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.
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
LF304 EVE
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
EVE 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
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
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.
EVE Energy is a technology-driven company focused on the development of lithium batteries. Their products are widely used in the IoT, EV and ESS. Eve Energy makes prismatic, pouch and cylindrical battery cells. Along with a range of other batteries, including Lithium metal non rechargeable batteries.
Company Website – www.evebattery.com EVE Energy Co., Ltd. (stock code: 300014)
Household ESS, Utility ESS, and Telecom ESS with products covering cells, modules, battery systems, battery management systems, and other comprehensive solutions
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