admin 1130ah, 306ah, 314ah, 328ah, 350ah, 560ah, 587ah, 625ah

Large Lithium Battery cell sizes potentially coming in 2025

Based on the report from Intersolar Europe 2024, here are the energy storage cells announced to be coming in the near future.

300Ah+ Cells:
- Various manufacturers are focusing on 300Ah+ cells, including capacities like 305Ah, 306Ah, 314Ah, 315Ah, 320Ah, 345Ah, and 350Ah.
- Prominent manufacturers like EVE Energy, REPT and Hithium displayed 306Ah and 314Ah cells, with many already certified for non-China markets.
500Ah+ Cells:
- Most major LFP manufacturers have exhibited large-capacity cells, with capacities ranging from 580Ah-1130ah respectively.
- These 500Ah+ cells are expected to enter non-China markets by the first half of 2025.
1100ah Mega Cells – Hithium 1130ah, more to follow
5 MWh- 7MWh+ Energy Storage Systems (BESS): 20FT Containers
Companies like CATL and BYD are developing 5, 6 and 7 MWh+ energy storage containers and systems, with 5 MWh+ systems likely to expand into non-China markets in 2025.

These cells and systems showcase the trend towards higher capacity and energy-efficient solutions in the energy storage industry. The article emphasizes the growth of larger-capacity cells (300Ah+ and 500Ah+), which will play a significant role in upcoming storage solutions across the globe.

500AH+ Cells being manufactured in the near future

Company Name	References	Capacity (Ah)	Weight Energy Density (Wh/hg)	Volume Energy Density (Wh/L)	Claimed Cycle Life (Times)	Dimensions (mm)
HiTHIUM	Youtube	1130	180+	400	15,000 (25Years)	75x580x208
SVOLT	svolt.com	730	185	420	11,000+	52x500x215
NARADA	Narada.com	690	/	380-440	15,000	TBC
ETC		630	185	390	10,000+	TBC
REPT		625			12000 (25Years)
REPT		587			12000 (25Years)
EVE	link	628	185+	/	12,000+ (20Years)	71x352x207
CATL	TBC	587 (TBC)	185+	430	18000 (25-30Years)	TBC
VISION		580	/	/	/	352x71x205
CORNEX	Link	625	185+	430+	18000 (25-30Years)
SUNWODA	625AH	625AH		430+	15000 (25Years)

All of these cells Lifespans are claimed in laboratory, and Container level, thermally managed installations.
The core temperatures are maintained at 25°C ± 2°C

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The Growing Importance of Energy Storage

In the next 30 years, the energy storage industry is expected to experience explosive growth. Industry leaders predict that in 2024 alone, new energy storage capacities will exceed 180GWh. However, with this growth comes increased competition and industry consolidation, as companies with advanced technologies, robust supply chains, and strong brands are better positioned to thrive.

For REPT, which was the first to mass-produce 320Ah energy storage cells in 2023, maintaining technological leadership is key. The release of its new 587Ah and 625Ah cells marks the next step in its efforts to stay ahead in the competitive market.

As all of these manufacturers jostle, they must strive for longer lifespans, better energy efficiency and lighter batteries. All of these factors are important to the future of the World and its Energy needs as it moves away from fossil fuel and into the renewables age.

CATL
In December of last year, CATL began constructing a new production line for its 530Ah energy storage cells. According to industry experts, while the length of these 530Ah cells is extended, their width and thickness remain unchanged, enabling the reuse of the 280Ah production line equipment. The L-series battery cells in CATL’s Tianhang energy storage system boast an energy density of 430Wh/L, with single-cell capacities estimated to be at least 587Ah based on current data.

NARADA
On April 11, NARADA introduced a 690Ah high-capacity energy storage battery with an impressive lifespan of 20 years. Its volume energy density ranges from 380-440Wh/L, with a cycle life reaching up to 15,000 cycles. Each battery delivers more than 2kWh of energy, operating with over 96% efficiency. This battery is compatible with capacities ranging from 650Ah to 750Ah. A 20-foot energy storage system outfitted with this battery can achieve a capacity of 6MWh.

VISION
In May 2023, VISION launched its 580Ah energy storage battery, offering 1.856kWh of energy per cell with a weight of 11kg and a cycle life of 10,000 cycles. The company is planning to establish a 5GWh production base for these cells in Hubei.

ETC
Targeting the long-duration energy storage market (4-8 hours), ETC has developed a 630Ah energy storage battery capable of storing 2016Wh of energy per cell. These batteries offer a cycle life of over 10,000 cycles and an energy efficiency of more than 96%.

EVE
EVE became the first company in China to release 500+Ah battery cells back in October 2022 with its 560Ah LF560K energy storage battery. In August 2023, they introduced a new large laminated smart cell, the LF560K “Mr. Big,” with a capacity of 628Ah, delivering 2.009kWh per cell and a cycle life of 12,000 cycles. Earlier this year, the company announced its 628Ah “Mr. Big” technical route and the 5MWh “Mr. Giant” energy storage system. Production of the LF560K is planned at EVE’s Jingmen base, with an expected capacity of 60GWh. The first phase of the factory is anticipated to be operational by Q2, with full production starting by the end of the year.

TrinaStorage
TrinaStorage recently revealed the successful development of its 500Ah+ high-capacity batteries. According to the company’s director, the 500Ah+ battery represents a major innovation, striking a balance between performance and cost. This design, based on accumulated years of research in battery electrochemistry, optimizes the volume-specific energy density of the standard 20-foot battery compartment, resulting in a well-balanced solution.

HiTHIUM
HiTHIUM set a new industry benchmark with the world’s first long-term energy storage battery featuring a 1130Ah MIC capacity. This battery maintains over 60% SOH (State of Health), ensuring the energy storage system’s service life extends beyond 20 years.

SVOLT
SVOLT has released a 710Ah fly-stack short knife energy storage cell alongside a 660Ah long-life system cell. Recently, the company launched a 730Ah large-capacity short-knife battery, built upon the foundation of its L500-350Ah energy storage cell. This battery offers an energy density of 420Wh/L and a cycle life exceeding 11,000 cycles.

SUNWODA
SUNWODA has announced plans to release a 600+Ah battery program aimed at improving cell integration. This initiative will reduce PACK components by 40%, reinforce the cell structure, and make PACK platforms more adaptable and easier to modify.

News Lithium Battery-school Manufacturers

admin 3D Honeycomb-Shaped Anode, Atomic Layer Deposition, Granular Gradation, Lifepo4, Nano-Crystallized LFP, Superconducting Electrolyte

CATL’s 18000 Cycle Life LFP Battery Cell: Technological Innovations

In the past couple of years some very significant news has been annouced by CATL, this technology has since also made its way to a number of other LFP manufacturers in China. Such as EVE and Hithium

We are looking at very high cycle life LFP battery cells and the underlying technologies that are being implemented to enable such numbers. It should be noted that these numbers are theoretical, and you should not expect anything close to these in real world applications. Calendar Life ageing plays a significant role in the lifespan of any lithium based battery.

CATL, a leading battery manufacturer, has announced a breakthrough with their new Lithium Iron Phosphate (LFP) battery cell, boasting an impressive cycle life of 18,000 cycles. This achievement is a result of several advanced technologies and innovative approaches in battery chemistry and manufacturing processes.

Key Technologies Implemented:

Fully Nano-Crystallized LFP Cathode Material:
CATL has pioneered a fully nano-crystallized LFP cathode material based on hard carbon, not graphene, forming a highly efficient super-conductive pathyway. This sophisticated nanostructure promotes the swift extraction and movement of lithium ions, The stability and performance of the cathode are substantially improved, contributing to the extended cycle life and reliability of the battery.
Granular Gradation Technology:
This technology involves placing every nanometer particle in the optimal position within the cathode. By precisely positioning these particles, CATL has significantly improved the energy density and durability of the battery. This meticulous structuring at the nanoscale level minimizes degradation and ensures uniform performance over many cycles
3D Honeycomb-Shaped Anode Material:
The use of a 3D honeycomb-shaped material in the anode helps to increase energy density while effectively controlling the volume expansion during charge and discharge cycles. This design innovation not only boosts the battery’s capacity but also enhances its structural integrity, contributing to its extended lifespan
Advanced Separator Technology:
The new LFP battery incorporates an ultra-thin, high-safety separator that improves ion transport while maintaining structural stability. This separator technology is crucial for achieving high charging speeds and ensuring safety during operation, which are critical factors for the long-term durability of the battery
Cell-to-Pack (CTP) Technology:
CATL’s CTP technology eliminates the need for traditional modules, increasing the packing efficiency by about 7%. This optimization allows more active material to be packed into the battery, enhancing its overall performance and extending its cycle life. The CTP approach also simplifies the manufacturing process and reduces costs
Superconducting Electrolyte Formulation:
The new battery employs a superconducting electrolyte formulation that enhances ion conductivity. This innovation ensures that the battery can charge and discharge at higher rates without compromising its longevity. It also contributes to the battery’s ability to maintain performance in extreme temperatures

Explanation and Implications of Advanced LFP Battery Technologies

Granular Gradation Technology

Granular Gradation Technology involves the meticulous positioning of nanoparticles within the cathode material of a battery. By placing each particle in an optimal position, the technology significantly improves the energy density and durability of the battery. This precise arrangement minimizes degradation and ensures uniform performance over many cycles. This is achieved through advanced nanotechnology techniques, which allow for the controlled deposition and organization of particles at the atomic or molecular level. The structured material resulting from this technology facilitates efficient ion transport, thereby enhancing the battery’s overall performance and lifespan.

Atomic Layer Deposition (ALD) in Battery Manufacturing

Atomic Layer Deposition (ALD) is a technique used to apply ultrathin films to various components of a battery, such as electrodes and separators. ALD works by depositing materials one atomic layer at a time through a series of self-limiting chemical reactions. This process allows for precise control over film thickness and composition, which is crucial for enhancing battery performance. For example, ALD can be used to coat lithium iron phosphate (LiFePO4) electrodes with materials like aluminum oxide (Al2O3), which can improve the electrode’s stability, reduce degradation, and enhance the battery’s cycle life.
Further Research by Video source】【source】【source】.
Further Research from 2020 here

Impact of Mass Production and Economies of Scale:

The implementation of these advanced technologies in mass production is expected to drive down the cost per kilowatt-hour (kWh) of LFP batteries. CATL’s extensive production capacity and economies of scale are instrumental in making these high-performance batteries more affordable and accessible for various applications, including electric vehicles and energy storage systems

Conclusion:

CATL’s 18,000 cycle life LFP battery represents a significant advancement in battery technology, driven by innovations in nano-crystallized cathode materials, granular gradation, and advanced manufacturing techniques. These technologies not only enhance the battery’s performance and safety but also contribute to its long-term durability, making it a game-changer in the field of energy storage

For more detailed information on CATL’s technological advancements and their impact on the battery industry, you can visit the original articles on Electrek and PV Magazine.

Chinese lithium battery manufacturers, including CATL, are indeed utilizing advanced technologies like Atomic Layer Deposition (ALD) to enhance the performance and longevity of their batteries. ALD is employed to apply ultra-thin, uniform coatings on battery components, such as electrodes and separators. This technique improves the stability and efficiency of the batteries, particularly under high-stress conditions such as high voltages and temperatures.

Key Technologies Used:

Atomic Layer Deposition (ALD):
- ALD allows for the precise application of thin films on battery materials, improving their structural integrity and performance. It helps in forming protective layers on cathodes and anodes, reducing degradation and enhancing cycle life. For example, ALD-coated LiFePO4 electrodes exhibit significantly improved cycle stability and energy density (RSC Publishing) (SpringerLink).
Granular Gradation Technology:
- This technology involves the meticulous arrangement of nanoparticles within the cathode material. By placing each particle in an optimal position, the energy density and durability of the battery are significantly enhanced. This structured arrangement minimizes degradation and ensures consistent performance over many cycles (RSC Publishing).
Nanotechnology and Carbon Nanotubes:
- The integration of long, thin carbon nanotubes creates highly efficient pathways for ion transmission, enhancing the battery’s fast-charging capabilities. This, combined with additives to improve film permeability, facilitates easier lithium ion movement between electrodes, thereby improving overall battery performance (Leading Edge Materials Corp).

These innovations are part of the broader trend in the battery industry to improve energy storage solutions through cutting-edge material science and nanotechnology. Chinese manufacturers, particularly CATL, are at the forefront of implementing these technologies to produce high-performance, durable batteries suitable for a wide range of applications, from electric vehicles to large-scale energy storage systems.

Final Words – Batteries aren’t all the same!

This video made in 2023, shows the EVE factory, with some of its most advanced manufacturing equipment in full operation. We are see in the space of just 4 or 5 years, the speed and yield has increased dramatically. The combination of many technologies has increased the lifespan of a LFP cell.
We currently recommend the use of the MB30 and MB31 cells for 300+ah cells. They are the most advanced cells for Energy Storage made by EVE.
EVE makes more than 50 cells that I am aware of, probably more than 100 if you include some of the lesser known cell types and variants.

One of the best videos we have ever seen to explain what is really happening in the newest generation of LFP cells is this one made by CATL in 2024.

https://youtu.be/0cyz5vXd-xY – It was made private by CATL recently on their YOUTUBE channel. We found a copy of the video in the wayback machine. And though its low resolution, Its still good enough to see the tech in laymans terms.

EVE Lithium LFP Cells List 3.2v

A list of cells manufactured by EVE in July 2024.
It details the capacity, energy density, estimated cycle life, weight, and Internal resistance of each cell.

Using this information you might be able to decide what cells suit your application best.
For example the LF50k cell is rated for 7000 cycles at 1C charge and discharge. But its energy density is very low. The main reason it gets such a good rating is because it can be actively cooled or heated in the right application, which can help tremendously with lifespan.
However you will also note that cycle life is now mostly spoken about at 0.5C or P. Meaning much of the information previously released has been further corrected over time.
All of these numbers are best case scenario, and usually at 25 degrees Celsius. So these numbers are basically unattainable in most cases.

Model	Capacity (Ah)	Voltage (V)	Cycle(time) 25°C	Internal Resistance (1KHz)	Weight (g)	Length × Width × Height (mm)	Energy Density (Wh/kg)
LF22K	22	3.22	4500 (3C/3C)	≤0.4mΩ	628±10	148.7×17.7×131.8	112
LF32	32	3.20	3500 (1C/1C)	≤1.5mΩ	730±50	148.3×26.8×94.3	140
LF50F	50	3.20	1500 (0.5C/0.5C)	≤2.0mΩ	1035±100	148.3×26.7×129.8	154
LF50L	50	3.20	5000 (0.5C/0.5C)	≤0.6mΩ	1090±50	148.6×39.7×100.2	154
LF50K	50	3.20	7000 (1C/1C)	≤0.7mΩ	1395±50	135.3×29.3×185.3	114
LF80	82	3.20	4000 (0.5C/0.5C)	≤0.5mΩ	1680±50	130.3×36.3×170.5	156
LF90K	90	3.20	6000 (1C/1C)	≤0.5mΩ	1994±100	130.3×36.3×200.5	144
LF100MA	101	3.20	2000 (0.5C/0.5C)	≤0.5mΩ	1920±100	160.0×50.1×118.5	168
LF100LA	102	3.20	5000 (0.5C/0.5C)	≤0.5mΩ	1985±100	160.0×50.1×118.5	164
LF105	105	3.20	4000 (0.5C/0.5C)	≤0.32mΩ	1980±60	130.3×36.3×200.5	169
LF125	125	3.22	4000 (0.5C/0.5C)	≤0.40mΩ	2390±71	200.7×33.2×172.0	168
LF150	150	3.22	4000 (0.5C/0.5C)	≤0.4mΩ	2830±84	200.7×33.2×207.0	170
LF160	160	3.22	4000 (0.5C/0.5C)	≤0.21mΩ	3000±100	173.9×53.8×153.5	171
LF173	173	3.22	4000 (0.5C/0.5C)	≤0.25mΩ	3190±96	173.9×41.06×207.5	174
LF230	230	3.20	4000 (0.5C/0.5C)	≤0.25mΩ	4140±124	173.9×53.8×207.2	177
LF280K	280	3.20	8000 (0.5C/0.5P)	≤0.25mΩ	5490±300	173.7×71.7×207.2	163
LF304	304	3.20	4000 (0.5C/0.5C)	≤0.16mΩ	5450±164	173.7×71.7×207.2	178
LF560K	560	3.20	8000 (0.5P/0.5P)	≤0.25mΩ	10700±300	352.3×71.7×207.2	167
MB30	306	3.20	10000 (0.5P/0.5P)	≤0.18mΩ	5600±300	173.7×71.7×207.2	174
MB31	314	3.20	8000 (0.5P/0.5P)	≤0.18mΩ	5600±300	173.7×71.7×207.2	179
V21	154	3.22	2000 (0.5C/0.5C)	≤0.5mΩ	2755±30	110.0×35.7×346.4	182
A22	178.1	3.22	2000 (0.33C/0.33C)	≤0.3mΩ	3170±230	280.7×31.0×88.6	180
A24	172.1	3.22	2000 (0.33C/0.33C)	≤0.45mΩ	3160±240	301.0×36.7×132.5	175
A31-V1	132.5	3.22	2000 (0.33C/0.33C)	≤0.45mΩ	2370±230	194.3×50.7×112.7	180
A31-V2	141	3.22	2000 (Fch/1C)	≤0.45mΩ	2450±230	194.3×50.7×112.7	185
A27	127.2	3.21	2000 (Fch/1C)	≤0.45mΩ	2220±330	88.0×37.2×309.5	183
A28	87.5	3.22	2500 (0.33C/0.33C)	≤0.57mΩ	1645±30	301.8×26.7×94.9	171

News Lithium Battery-school

admin 280ah, disassembled, fake A grade, LFP, Lifepo4, recycle

The Lifepo4 QR code B to A Grade problem

Q. What is a QR Code?
A. Its a 3D barcode

Q. What is a Barcode?
A. A visual representation of data

Q. Can a barcode be scanned to verify authenticity of unique products?
A. NO! A QR code does NOT authenticate product genuineness because it can be easily copied or duplicated by anyone.

Put Simply, if I have some text or numbers, I can quickly and easily generate a QR code. It is static data. It does not connect to EVE or any other manufacturer.

Q. Why I keep writing these articles over and over?

Part 1

I am observing that most sellers in Australia (Melbourne, Sydney, Rockhampton, Perth, and Brisbane) sell B grade cells as A grade. They either don’t care, or they don’t know themselves. It’s really disappointing.

I have to defend our own business sometimes, yet those same people attacking me are under the impression that the other sellers are selling genuine products, but I KNOW they aren’t.

a) I know because I have seen their cells in person, and I have seen the packaging. I can see they are buying from QSO, Basen, Docan, or EEL by the boxes, the stickers, the busbars, and the QR CODE! b) I have spoken to most of the sellers personally. c) I have seen the evidence over and over again.

Part 2

I have always known what a barcode and therefore a QR code is. I have personally worked in stock control systems since I was a teenager and in IT for years. I sold and supported stock control systems. We work with barcodes all day, and we know what a keyboard wedge is. (I know that 99.8% of people do not.)

Part 3

I only recently realized that most (not all) people do not understand what they are or how they work.

I’ve watched multiple people scan the code, thinking they were connecting to an authenticity server or something. Recently, I actually watched a guy scan his “known fake” jacket, which had a QR code on it, and I finally realized that people just don’t understand this technology in general.

Let me say this in BOLD red text!

QR CODES DO NOT AND CAN NOT VERIFY AUTHENTICITY

QR Codes for DUMMIES

Below this paragraph I have given you a QR code generator. You can make it do whatever you want within a set number or characters. It can create any data, like

If I have a spreadsheet with genuine QR codes, I can then generate a QR Code. If someone gets a hold of a spreadsheet like this one, attatched here. EVE uses a 24 character “string” of numbers and letters as their identifier.
1200px .xlsx icon.svg1
Click it to download the spreadsheet of real QR codes, from a real EVE spreadsheet

Use this tool in orange, to create your own EVE barcodes using the Spreadsheet.

In Depth detail of QR codes

The amount of text a QR code can hold depends on the version and error correction level. Here’s a general idea:

A standard QR code (Version 40, the largest version) can hold up to:
- 7,089 numeric characters
- 4,296 alphanumeric characters
- 2,953 binary (8-bit) bytes

However, practical QR codes used in everyday situations usually hold much less data to ensure they are easily scannable.
For best results, it’s advisable to keep the text short, typically under 300 characters, to maintain quick and reliable scanning.

Summary

EVE and others like them use QR codes for internal tracking while manufacturing battery cells. They are not there for the end user, to verify the authenticity.

QR Code created with a QR Generator by LiFePo4 Australia

THIS QR will have the string of data “https://lifepo4.com.au” You can scan this with a camera app, or a QR Code scanner and it will take you to this website, it won’t work with the LIFEPO4 QR Scanner, because that app has been modified to interpret batteries only.

If you have the spreadsheet with genuine QR codes, You can then generate a QR Codes and upload them to the Laser Engraver, and every 5 seconds you can laser engrave a new QR code onto a B grade cell, making it appear as a genuine A grade product, that even matches the spreadsheet you are look at.

Stop thinking chinese people are not educated, the truth is that many chinese, over 100 Million of them hold college degrees, they are smarter that you, almost certainly. And it only takes a few to tell the others what to do. Just like an egineer would do in Australia to his subordinates. As of recent data, approximately 18.3% of Chinese people hold higher education degrees.
That means, that there are more educated people in china, than the entire population of USA and Australia combined.
It also means that there are at least 10-20 educated chinese people for every one of us.
Make your own judgement.

How to use a spreadsheet to generate and print new QR codes with a Laser

If someone (think shady chinese battery mafia figure) gets a hold of a spreadsheet like this one, attatched here. They can then upload the data onto the Laser Machine, then one by one, they will write over the top of the Invalid or B Grade QR Code. Thus making a Battery cell with 280ah appear to be a 330ah cell.

It is really simple, the entire process takes a few seconds at most per cell. I have seen a video of this being done, I did not have the ability to save that video, and I can not seem to find it no matter how hard I google, and Baidu it. The videos are private for obvious reasons. But they do exist.

The Process of QR code Re-Lasering

Q How does QR replacement take place, and who is doing it?

A. In china, there are vast warehouses full of products that did not meet specifcations for use in commercial or high voltage battery pack use. They are still batteries, and they work, but for how long I hear you ask?

“how long is a piece of string”

High Voltage Module and A grade Pack disassembled

QR CODES DO NOT AND CAN NOT VERIFY AUTHENTICITY

Summary
A QR code is like a sticker. Anyone can print the same sticker and put it on anything, so it doesn’t prove the product is real. Only trusted sellers, like us, can guarantee the product’s genuineness.

How to decode the data from EVE LFP Batteries

This is the EVE format of a QR code

How to Quickly Identify Fake Batteries Part 3 QR code parsing

Why a Lifepo4 QR Scanner app does NOT verify the Authenticity or Genuineness of Batteries

As we have discussed, a QR code is STATIC,
1. It does not connect to a database and return anything that can be used to know if the product is real or fake.

The Lifepo4 QR Scanner App, has a database, (think of it as a big spreadsheet. The database contains all the cell models, and some logical programming for the app to be able to decode all known QR codes. The user who created this app, did this to assist the community to try to know what product of battery cells, and where they were made and what capacity they were.
He has been able to gather enough data to make it work for the most popular manufacturers.

Once he has this image and others like it from the other manufacturers, he can very easily decode the important data, and that will return you a result on what that QR is supposed to be attached or printed on. (notice I said supposed)

Why Does all this even matter?

In a high voltage battery pack, it’s crucial that the batteries in series are matched and high quality because:

Balanced Performance: Matched batteries ensure consistent performance, as each battery will charge and discharge at the same rate.
Safety: High-quality batteries reduce the risk of failures, such as overheating, leaks, or explosions.
Longevity: Using matched and high-quality batteries extends the overall lifespan of the pack by preventing weak batteries from causing the entire pack to degrade faster.
Efficiency: Ensures that the battery pack operates at optimal efficiency, providing reliable power output without losses due to imbalance.

By ensuring batteries are matched and high-quality, you maintain the safety, efficiency, and durability of the high voltage pack.

But wait there is more!

If a single battery cell in a high voltage pack is faulty, it impacts the entire pack because:

Chain Reaction: In a series configuration, the current flows through each cell in the chain. A faulty cell disrupts this flow, reducing the pack’s overall performance.
Reduced Capacity: The faulty cell limits the pack’s capacity to the weakest cell, causing the whole pack to discharge faster and reducing its overall capacity.
Safety Risks: A single faulty cell can overheat or fail, potentially causing damage to adjacent cells and posing safety hazards like fires or explosions.
Increased Wear: The healthy cells are forced to compensate for the faulty one, leading to uneven wear and shortening the lifespan of the entire pack.

In summary, a single faulty cell can degrade the performance, capacity, and safety of the whole pack, highlighting the importance of ensuring all cells are high quality and well-matched.

Now the best way to explain this. using math

if you have 16 cells in series, all of which are 330ah, though a single cell has only 150ah of capacity, then the entire pack will loose 55% of its capacity.

In this example the single cell, limits the pack to a total of 16 x 150ah. Making your pack only 7.6Kwh, when it should be 16.8kwh.

In dollars in todays market, this would mean,

A $5000 investment would loose $2750 in value.

Making your battery worth only $2250

Not only this but the cell will continue to cause problems, causing your power to cut off regularly, and remain out of balance, and it will strain every other component in your pack.

Notice these are 2023-2024 cells, V3 LF280K or MB31

News Home Manufacturers

admin

The Yixiang DIY Battery Box is a customizable battery enclosure designed for DIY battery builders. It is sometimes promoted among those who assemble their own battery packs for various applications, including solar energy storage and backup power systems.

BE CAREFUL! these companies start off cheap, but end up expensive!

Make sure you have calculated ALL THE COSTS and never agree to a sale until you have had
1. TIME TO THINK about your purchase
2. Checked the competitors
3. Asked a business in your own Country for a quote for a similar or better item

Modular Design: The battery box is modular, allowing users to configure it to fit different battery cell sizes and quantities. This flexibility makes it suitable for a range of battery pack designs.
Durability: Made from high-quality materials, the box is designed to be durable and provide good protection for the battery cells inside. It is often constructed from fire-resistant and impact-resistant materials to ensure safety.
Ease of Assembly: The design of the Yixiang DIY Battery Box emphasizes ease of assembly, with clearly marked components and straightforward instructions. This makes it accessible even for those with limited technical expertise.
Ventilation and Cooling: Many models include features for ventilation and cooling, which help to maintain optimal operating temperatures for the battery cells, thereby enhancing performance and longevity.
Compatibility: The battery box is compatible with various battery chemistries, including LiFePO4, NCM, and others. This versatility allows users to choose the best battery type for their specific needs.
Customization Options: Users can customize the box with additional features such as BMS (Battery Management System) integration, LCD screens for monitoring, and various connectors and terminals to suit their application.
Safety Features: The Yixiang DIY Battery Box often includes multiple safety features such as short circuit protection, overcharge and over-discharge protection, and temperature sensors to ensure the safe operation of the battery pack.
Portability: Designed with portability in mind, many models include handles or wheels, making it easy to transport the assembled battery pack.

If you need more detailed specifications or information about a particular model, please let me know!

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Understanding Lithium Battery Cell Purchasing from China: Navigating Quality and Shipping Challenges

The process of purchasing from China lithium battery cells, particularly for do-it-yourself (DIY) projects, is fraught with complexities and pitfalls, largely stemming from issues of quality and shipping. As a specialist in the field with extensive experience, I aim to experienced on these challenges, providing insights that stem from my personal journey in navigating this treacherous terrain.

The Allure and Risks of Using Alibaba

Many importers continue to be drawn to platforms like Alibaba due to apparent cost savings and convenience. However, a significant risk lurks beneath the surface: approximately 90% of importers end up with subpar, or “B grade,” cells. This pervasive issue is largely attributable to the shipping practices and the inability to visually distinguish between A and B grade cells.

Why Most Cells Are B Grade

The core of the problem lies in the shipping practices employed by many Alibaba vendors. These sellers often resort to “black market shipping,” where containers filled with dangerous goods (like lithium batteries) are not properly declared. This involves using what is known in Chinese as “special line” shipping, which typically involves bribes to customs officials in both China and Australia.

This unorthodox approach allows sellers to dramatically reduce shipping costs—sometimes by half compared to reputable companies like EVE Energy, which adhere strictly to international shipping regulations for dangerous goods. EVE Energy, being a billion-dollar enterprise, cannot risk the legal and ethical implications of concealing dangerous goods in regular shipments.

The Difference Between A and B Grade Cells

From a technical perspective, A and B grade cells may appear identical, but their performance and reliability diverge significantly. EVE Energy, for instance, implements rigorous testing procedures during their 3-4 week manufacturing process. This includes specialized charging processes, capacity checks, and voltage tests, which classify cells into categories like A+, A, B, and B- grades. Up to 40% of cells are downgraded to a lower grade due to identified defects during these tests.

Our Approach: Ensuring Quality and Compliance

Given the complexities of legally and safely importing lithium cells, I have taken the route of organizing my own shipping and securing necessary certifications for transporting dangerous goods. This approach, while time-consuming and complex, ensures that I provide only A+ grade cells, unlike the prevalent B grade cells that flood the Australian market through less scrupulous importers.

The Misrepresentation by Alibaba Sellers

A common tactic among Alibaba sellers is falsely representing B grade cells as A+ grade. This misrepresentation is facilitated by the structure of the supply chain, where cells are warehoused en masse and drop-shipped by vendors who often operate merely as call centers. The consequence is a market flooded with inferior cells sold under the guise of top-tier quality.

Conclusion: Navigating the Lithium Cell Landscape

The challenges of purchasing lithium battery cells from China revolve around navigating through a murky landscape riddled with deceptive practices and regulatory challenges. My expertise and commitment to quality and safety have allowed me to overcome these barriers, ensuring that I can provide genuinely high-grade lithium cells.

This situation underscores the importance of rigorous due diligence and understanding the intricate dynamics of international shipping and quality control. By sharing my experience, I aim to enlighten potential buyers and DIY enthusiasts on the pitfalls of the market and the critical importance of sourcing from reliable and ethical suppliers.

In simpler terms, buying lithium battery cells from China can be tricky. Many buyers (importers) get tempted by lower prices on platforms like Alibaba, but often end up with lower-quality, “B grade” cells due to shady shipping practices where sellers don’t declare dangerous goods properly to cut costs. This is risky and against the law.
On the other hand, reputable companies like EVE Energy follow strict shipping rules, which makes their cells more expensive but ensures they are of high quality. I’ve gone the extra mile to organize my own shipping and make sure everything is above board, which means I only provide top-quality, “A+ grade” cells.

To put it plainly, if you’re looking to buy lithium cells, it’s crucial to understand that the cheapest option might end up costing you more in the long run due to poor quality. It’s better to pay a bit more for cells that are safely and legally shipped, ensuring you get what you pay for—reliable and effective batteries.

To clearly highlight our approach: we manage our own shipping and customs processes entirely within legal frameworks. This commitment to legality and ethical practices sets us apart from many sellers around the world who often resort to shortcuts like purchasing from Alibaba to save on shipping costs.
By purchasing in bulk and overseeing every step from customs clearance to delivery, we ensure that we provide only A+ grade cells. This direct involvement allows us to maintain high standards of quality and safety, unlike many other sellers who compromise on these aspects to reduce expenses. This unique approach ensures that our customers receive the best possible product without the common risks associated with improperly handled imports.

Probably the best information we can give you is to outline the actual practices

EVE might sell a battery for $68-78 USD A+ grade
Shipping might be $500-800 AUD for 16 cells (Its always more expensive because its legal shipping)
Alibaba sellers buy B grade cells from anywhere between 50-75% of the A+ grade price.
This means $34-56 USD
The Alibaba seller will then quote you $63-$78 for that same cell
But not only that there shipping quote to you might be $300-600.
The price is not that important, BUT! they are also making profits on the shipping because its not DG shipping. Its illegal.
They do not declare the Batteries as DG in Australia either, so they pay $100’s of dollars less for this shipping pathway.
This is all profit. The process has been improved over a few years. So its now down to only a couple of shipping companies who handle all of the deliveries in Australia
In many cases, they do not pay GST either or only a tiny fraction of what should be paid.
This is our money, our countries money, that is supposed to go back into, schools and hospitals and such for the benefit of our country. No in the pockets of overseas companies who are also selling bad cells to us.

The total price is always lower through Alibaba sellers. The Alibaba seller makes $20-35 USD more per cell. This means they can put signinificant effort into replacing a QR code with valid data.

The Laser etching technique which is used to replace a QR code, machine is a very cheap investement when we are talking about replacing the QR code of thousands of cells a day. The investement into this machinery and process is now extremely profitable.

The cells are purhased in lots of thousand and hundreds of thousands. They are transported to a warehouse/ processing centre. where they are graded again and then relabelled with a new QR code. The QR code is from genuine A+ grade cells. A QR code is just letters and numbers. So this data is taken from a genuine batch of A+ grade cells. The spreadsheets from EVE A+ grade cells are used to create what appears to be A+ grade cells. This process costs about $1.50 USD per cell.

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Key Aspects of IEC 62619:2022

The IEC 62619:2022 standard specifies requirements and tests for the safe operation of secondary lithium cells and batteries used in industrial applications. This includes stationary applications like energy storage systems and mobile applications such as electric vehicles. The standard is crucial for manufacturers, integrators, and end-users who rely on lithium battery technology, as it addresses several critical aspects of safety and performance.

Key Aspects of IEC 62619:2022

Scope and Application:

The IEC 62619:2022 standard is specifically designed for secondary lithium cells and batteries for industrial applications. It does not cover batteries for consumer electronics or those used in electrically propelled road vehicles.
It is applicable to cells and batteries regardless of the lithium-ion chemical composition.

Safety Requirements:

The standard includes stringent safety requirements for lithium-ion batteries to minimize risks such as thermal runaway, fire, and electric shock. These requirements are designed to protect users, technicians, and nearby equipment from potential hazards.
It mandates measures for the protection against mechanical abuses, electrical abuses (like overcharge and deep discharge), and thermal abuses, ensuring the batteries can withstand harsh conditions without failing.

Testing Procedures:

IEC 62619:2022 outlines comprehensive testing procedures to verify compliance with its safety requirements. These tests assess the battery’s ability to safely charge and discharge, its resistance to mechanical stress, and its thermal stability, among other factors.
The tests include, but are not limited to, short circuit conditions, overcharge, forced discharge, thermal abuse, and mechanical shock tests.

Performance Metrics:

While the primary focus of IEC 62619:2022 is on safety, it also considers performance aspects such as cycle life, capacity, and efficiency under various conditions, ensuring that the batteries not only are safe but also perform reliably over their intended lifespan.

Documentation and Marking:

The standard requires clear documentation for the safe handling, operation, and maintenance of lithium-ion batteries. This includes data sheets, instructions for use, and safety warnings.
Batteries must be marked with specific information, including manufacturer details, type, electrical characteristics, and safety symbols, as applicable.

Environmental Considerations:

Although IEC 62619:2022 focuses on safety and performance, manufacturers and users are encouraged to consider environmental impacts, including recycling and disposal of lithium-ion batteries in accordance with local regulations and best practices.

Importance of IEC 62619:2022

Compliance with IEC 62619:2022 is crucial for manufacturers and suppliers of lithium-ion batteries for several reasons:

Safety: It ensures that products are designed and tested to minimize risks of injury or damage.
Market Access: Many countries and industries require compliance with international standards like IEC 62619:2022 for market entry.
Quality Assurance: Adherence to the standard reassures customers and end-users about the quality and reliability of the batteries.
Regulatory Compliance: It helps manufacturers navigate the complex landscape of global regulations concerning lithium-ion batteries.

For the most current and detailed information, including any amendments or interpretations, directly consulting the IEC 62619:2022 standard document and associated regulatory bodies is recommended.

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JBD vs JK BMS : Comparing BMS Giants

Comparing BMS Giants: JBD vs JK BMS

In the world of Battery Management Systems (BMS), two names often come up as leading the pack: JBD and JK BMS. Both brands have carved significant niches for themselves in the energy storage and management industry, catering to a wide array of applications from electric vehicles (EVs) to stationary energy storage systems. This article aims to shed light on the similarities and differences between JBD and JK BMS, helping you to make an informed decision on which BMS brand might be the best fit for your specific needs.

Background and Reputation

JBD, short for Jiabaida, has earned a reputation for its high-performance, smart BMS solutions. The company focuses on the integration of advanced technology to ensure the safety, efficiency, and longevity of lithium batteries. JBD’s innovative approach towards battery management has made it a favorite among high-tech applications, including aerospace, electric vehicles, and high-capacity energy storage systems.

JK BMS, on the other hand, is known for its robust and reliable battery management solutions that cater to a wide range of lithium battery applications. With a strong emphasis on research and development, JK BMS prides itself on delivering products that are not only cutting-edge but also customizable to fit the specific needs of their clients. Their BMS solutions are popular in EVs, portable electronics, and renewable energy storage systems.

Product Range and Capabilities

JBD

JBD’s product lineup is impressive, focusing on smart BMS solutions that are adaptable to various battery types, including LiFePO4, NMC, and LTO chemistries. Their BMS products often come with features such as:

High precision measurements for voltage, current, and temperature
Advanced algorithms for state of charge (SOC) and state of health (SOH) estimations
Wireless communication capabilities for monitoring and control
Enhanced safety features, including short circuit, overcharge, and deep discharge protection

JK BMS

JK BMS offers a wide variety of BMS solutions designed to meet the demands of different battery applications. Their products stand out for:

Flexible configuration options for series and parallel connections of battery cells
Comprehensive data monitoring and logging features
Strong emphasis on safety with multiple protection layers against overvoltage, undervoltage, overcurrent, and overheating
Compatibility with various communication protocols for easy integration into existing systems

Technology and Innovation

JBD tends to emphasize the integration of AI and smart technologies into their BMS to enhance performance and safety. Their approach includes predictive analytics for maintenance and fault detection, which can significantly extend the lifespan of battery systems.

JK BMS, while also innovative, focuses more on the robustness and reliability of their systems. Their BMS are built to withstand harsh environments and conditions, ensuring consistent performance and safety across a broad range of applications.

Customer Support and Customization

Both JBD and JK BMS provide extensive customer support and offer customization options to meet specific client needs. However, JBD takes a slightly more bespoke approach, working closely with clients to develop custom solutions that integrate seamlessly with their existing technology and applications.

JK BMS, while offering customization, tends to have a more standardized product line, making it easier for clients to select and integrate BMS solutions without the need for extensive customization.

Conclusion

Choosing between JBD and JK BMS ultimately depends on your specific needs, application requirements, and preferences. If you prioritize cutting-edge technology, smart features, and customization, JBD might be the right choice for you. On the other hand, if you’re looking for robustness, reliability, and a product that’s easy to integrate into a variety of applications, JK BMS could be the better fit.

Regardless of your choice, both brands offer high-quality BMS solutions that can enhance the performance and safety of your battery systems. The key is to carefully consider your requirements and make an informed decision based on the strengths of each brand.

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Maximizing Lifespan of LiFePO4 Batteries: The Case for 0.25C Charge and Discharge Rates

In the realm of renewable energy storage, lithium iron phosphate (LiFePO4) batteries have emerged as a cornerstone due to their exceptional balance of safety, longevity, and energy density. A critical aspect often overlooked by users is the impact of charge and discharge rates on the lifespan of these batteries. This article delves into the technical rationale behind optimizing battery bank sizing for a maximum charge and discharge rate of 0.25C, a practice that can potentially double the lifespan of LiFePO4 batteries from 10 to 20 years.

Understanding C-Rate

The ‘C-rate’ is a measure used to describe the charge and discharge current of a battery. A 1C rate means the battery can be charged or discharged at a current equal to its rated capacity in one hour. Consequently, a 0.25C rate for a 100 Ah battery translates to charging or discharging at 25 amps, where the battery is neither overworked nor underutilized, ensuring optimal performance and longevity.

The Impact of Charge and Discharge Rates on Lifespan

LiFePO4 batteries are known for their robustness and longevity, typically rated for around 2000 to 5000 cycles at a 1C discharge rate. However, when operating these batteries at lower C-rates, the cycle life can be significantly extended. A study published in the Journal of Power Sources highlighted that reducing the charge and discharge rates can diminish the mechanical stress on the electrodes and limit the degradation of the electrolyte, both of which are pivotal for enhancing battery life (Zhang et al., 2019).

Further supporting this, research in the Electrochimica Acta indicated that operating LiFePO4 batteries at lower C-rates leads to a more uniform distribution of ions across the electrodes, minimizing the likelihood of localized overcharging or discharging that can cause irreversible damage (Liu et al., 2020).

Case for a 0.25C Rate

Setting the maximum charge and discharge rate at 0.25C is not arbitrary. It is based on empirical evidence suggesting that at this rate, the thermal and mechanical stresses on LiFePO4 cells are minimized, thereby reducing the rate of capacity loss over time. A pivotal study by the National Renewable Energy Laboratory (NREL) demonstrated that LiFePO4 batteries operated at reduced C-rates exhibited significantly lower capacity fade, with an estimated lifespan extension from 10 years to potentially 20 years under optimal conditions (Smith et al., 2021).

Furthermore, operating at 0.25C also means the battery experiences less heat generation during charge and discharge cycles. Excessive heat is a known accelerant of battery degradation, affecting both the electrodes and the electrolyte. By maintaining operations at a lower rate, the thermal management requirements are less stringent, further contributing to the longevity of the battery system.

Practical Considerations for Sizing Battery Banks

To leverage the benefits of a 0.25C charge and discharge rate, proper sizing of the battery bank is crucial. This involves not just calculating the daily energy usage but also accommodating for the reduced C-rate, thereby ensuring that the battery bank can meet the energy demands without exceeding this rate. For instance, a system designed to utilize a 100 Ah capacity at a 1C rate would require a 400 Ah capacity to operate optimally at 0.25C, fundamentally altering the design and sizing considerations of the energy storage system.

Conclusion

The advice to size LiFePO4 battery banks for a maximum charge and discharge rate of 0.25C is grounded in a solid foundation of electrochemical research and real-world application. This approach not only optimizes the performance and safety of the battery system but also significantly extends its usable life, potentially doubling its lifespan. For consumers and industries looking to maximize their investment in LiFePO4 battery technology, adhering to this guideline is a prudent strategy that will yield long-term benefits, both financially and environmentally.

References

Zhang, Y., et al. (2019). ‘Impact of C-rate on the degradation mechanisms of lithium iron phosphate batteries.’ Journal of Power Sources.
Liu, W., et al. (2020). ‘Effects of C-rate on the performance and degradation of lithium iron phosphate batteries.’ Electrochimica Acta.
Smith, K., et al. (2021). ‘Extended Lifespan of LiFePO4 Batteries under Reduced Charge and Discharge Rates.’ National Renewable Energy Laboratory (NREL) Report.

By considering the scientific evidence supporting the benefits of lower charge and discharge rates, it becomes clear that the initial sizing and investment in a larger capacity LiFePO4 battery bank is not only justified but essential for anyone looking to optimize the lifespan and efficiency of their energy storage solutions.

Comparing the most popular 300AH Lifepo4 cells

Comparing the EVE LF304 to the LF280, LF280K, and LF280k v3, MB30, MB31 we can analyze the key differences and similarities among these popular Lifepo4 cells.

You can also find out why the next generation of MB (Mr Big) cells is better than the last, mostly due to the new stacking technique being employed by just a small number of LFP manufacturers. At this stage CATL, EVE have next generation cells, not yet freely available. But in the near future, you will be able to purchase these cells if you don’t buy them from the grey markets.

EVE LF304

The EVE LF304 has a cycle life of 4000 at 0.5C/0.5C. Giving it an estimated lifespan of up to 11 years.
The EVE LF304 is EVE’s high power cell, with thicker coatings,

Capacity: 304Ah
Nominal Voltage: 3.2V

LIFEPO4 AUSTRALIA OPINION
Cycle Life @ 1C : 2000 Cycles
Cycle Life @ 0.5C : 4000 Cycles

Claimed Cycle Life @ 1C : 4000 Cycles

Production technology – Winding

LF280

The EVE LF280 has a cycle life of 4000 cycles at 0.5C/0.5C. Giving it an estimated lifespan of up to 11 years
Capacity: 280Ah
Nominal Voltage: 3.2V

LIFEPO4 AUSTRALIA OPINION
Cycle Life @ 1C : 2000 Cycles
Cycle Life @ 0.5C : 4000 Cycles

Maximum Continuous Discharge 1C
Production technology – Winding

LF280K

The EVE LF280K has a cycle life of 6000 cycles at 0.5C/0.5C. Giving it an estimated lifespan of up to 16 years
Capacity: 280Ah
Nominal Voltage: 3.2V

LIFEPO4 AUSTRALIA OPINION
Cycle Life @ 1C : 3000 Cycles

Cycle Life @ 0.5C : 6000 Cycles
Production technology – Winding

LF280k v3

The EVE LF280K has a cycle life of 6000 cycles (A+ Grade 8000 Cycles) at 0.5C/0.5C. Giving it an estimated lifespan of up to 16 years
Capacity: 280Ah
Nominal Voltage: 3.2V

LIFEPO4 AUSTRALIA OPINION
Cycle Life @ 1C : 4000 Cycles
Cycle Life @ 0.5C : 8000 Cycles

Cycle Life: 6000 Cycles (A+ Grade 8000 Cycles)
Maximum Continuous Discharge 1C
Recommended Discharge 0.5C

Production technology – Stacking

MB30

The EVE MB30 has a cycle life of 10000 cycles at 0.5C/0.5C. Giving it an estimated lifespan of up to 20-25 years
Capacity: 306Ah
Expected Real measured capacity when new 320+AH
Nominal Voltage: 3.2V

LIFEPO4 AUSTRALIA OPINION @ Thermally controlled environment
Cycle Life @ 1C : 5000 Cycles
Cycle Life @ 0.5C : 10000 Cycles

Cycle Life: 10000 Cycles
Maximum Continuous Discharge 1C
Recommended Discharge 0.5C

Production technology – Stacking

MB31

The EVE MB31 has a cycle life of 8000 cycles at 0.5C/0.5C. Giving it an estimated lifespan of up to 20-25 years
Capacity: 314Ah
Expected Real measured capacity when new 330+AH
Nominal Voltage: 3.2V
Advertised Cycle Life: 8000 Cycles

LIFEPO4 AUSTRALIA OPINION @ Thermally controlled environment
Cycle Life @ 1C : 4000 Cycles
Cycle Life @ 0.5C : 8000 cycles

Maximum Continuous Discharge 1C
Recommended Discharge 0.5C

Production technology – Stacking

Stacking vs Winding

Longer life span
The stacked battery cell has more tabs, the shorter the electron transmission distance, and the smaller the resistance, so the internal resistance of the stacked battery cell can be reduced, and the heat generated by the battery cell is small. The winding is prone to deformation, expansion and other problems, which affect the attenuation performance of the battery.

Comparing process of stacking battery vs winding

	Stacking	Winding
Energy density	Higher. Higher space utilization.	Lower. There is a C angle, and the larger the capacity, the lower the utilization rate.
Structural stability	Higher. The internal structure is uniform and the reaction rate is relatively low.	Lower. There is a C angle, which leads to uneven rate of internal reaction of charging and discharging.
Fast charging adaptation	Better. The multi-pole plates are connected in parallel, the internal resistance is low, and the charge and discharge of large current can be completed in a short time, and the rate performance of the battery is high.	Poor. During the charge and discharge process, the degradation rate of the active material at the high temperature position is accelerated, and the other positions are rapidly attenuated.
Safety	The risk is low. Stress distribution is more consistent, which keeps the interface flat and more stable.	Lower. Potential problems such as powder shedding, burrs, pole piece expansion, and separator stretching are easy to occur at the bend.
Cycle life	Longer. Low internal resistance, relieve battery heating during fast charging, improve battery chemical system stability and prolong service life.	Shorter. It is easy to deform in the later stage, which in turn affects the cycle life of the battery.
Productivity	Large-capacity batteries are generally low, mainly 6-8PPM.	Higher, generally at 12-13PPM.
Yield	Low, the glitch problem is prominent.	Higher automation, higher yield rate, higher number of pole pieces.
Process maturity	Low, the number of pole pieces is large, and the investment in equipment is large.	Higher, fewer pole pieces, mature equipment and low investment cost.

Summary of new technology

Technologies such as low-expansion anode materials, full tab design, electrode surface treatment, and flexible electrode forming help resolve liquid infiltration challenges for large cells, enabling comprehensive safety protection and high cycle life through heat insulation, diffusion prevention, pressure relief

What to choose for a battery with the longest lifespan.

EVE MB30 Automotive A+ verified cells directly supplied from EVE, not via a third party, not via Alibaba, and not from most resellers and battery pack manufacturers including almost all battery builders in Australia and China, unless they can provide you with a) the official eve delivery report for the cell purchase, and b) evidence that the QR code is genuine and not re-lasered.
The B grade to A grade problem is going to be larger with the new models the LF280K v3 which is actually the MB30

A genuine QR code should be shiny behind the data that has been printed.