Description

JBD 2A Active Balance 200A 16s Smart BMS with 2A Active Balancer

Product Introduction

• Model Name: JBD-OH series, specifically for Lithium Iron Phosphate (LiFePO4) series.
• Design: Utilizes front-end acquisition chips and microcontroller (MCU) architecture.
• Customization: Some protection parameters can be adjusted via APP or PC

Configuration

• Number of Strings Supported: 51.2 (16s) and anything between 10 to 17 strings.
• Maximum Continuous Current: 40-200A.
• Communication Interfaces: Includes isolated 485 communication, CAN communication, and non-isolated UART interface.
• Temperature Monitoring: Supports 2 internal and 2 external temperature detection paths.
• Balance Function: 2A Active balancing supported.
• Additional Features: Optional Bluetooth module, parallel battery pack connection, and LCD display.

Parameter Settings

• Cell Specifications: 10-17 strings of Lithium Iron Phosphate (LiFePO4) batteries.
• Programable Voltage Range: Each cell operates within 2.30V to 3.75V. (We recommend 3v-3.6v for LiFePo4)
• Current: Supports continuous charging and discharging currents up to 200A.
• Protection Parameters: Detailed settings for over-voltage, under-voltage, over-current, and temperature protection.

Function Descriptions

• Overcharge and Over-discharge Protection: The BMS enters protection mode when voltage thresholds are crossed, turning off the MOSFETs to prevent charging or discharging until voltages return to safe levels.
• Over-current Protection: Includes protection and recovery mechanisms for both charging and discharging over-currents.
• Temperature Protection: Manages high and low-temperature conditions during charging and discharging.
• Balance Function: Manages cell voltage differences to ensure balanced charging and discharging.
• Capacity Calculation: Accurately calculates the State of Charge (SOC) by integrating current over time.
• Sleep Function: Reduces power consumption when the system is idle.

Communication

• Serial Communication: Supports UART and RS485 communication, with detailed setup instructions.
• CAN BUS: Provides configuration for CAN communication with specific baud rates and settings.

Main Materials and Components

• Chips and Components: Lists specific chips and components used, such as the OZ3717 front-end chip and HC32L072KATA MCU.
• Accessories: Includes various connectors and communication lines.

Environmental Suitability

• Operating Conditions: Designed to operate in temperatures ranging from -20°C to 75°C and relative humidity of 5% to 90%.
• Storage Conditions: Should be stored in clean, well-ventilated environments, avoiding direct sunlight and mechanical shock.

Packaging and Shipping

• Packaging Requirements: Must be moisture-proof and vibration-proof, with secure packaging to prevent movement.
• Transport Guidelines: The product should not be exposed to severe mechanical impacts or harsh environmental conditions during transport.

Precautions

• Usage Restrictions: Not generally suitable for series use unless customized. Short-circuit protection is not guaranteed under all conditions and requires specific testing.
• Assembly and Soldering: Requires careful handling to avoid damaging the circuit board and ensuring proper connections.

BMS DFE IC Features

Highly accurate Digital Front End (DFE) with High Side Driver

• Voltage, Current & Temperature + Control

14-bit Analog to Digital Converter (SAR ADC)

• High precision voltage measurement
  • Cell Voltage: 17 inputs, typical 5mV accuracy
  • Pack Current Sense
  • VPACK, VBAT, V5, and VMCU Voltage measurements
  • 3 External Temperature inputs with 2 selectable precision current sources
  • 1 Internal Temperature input
  • 1 Auxiliary: Direct ADC input

16-bit Analog to Digital Converter (∆ ADC)

• High precision current measurement and Coulomb Counting (CC)

High Side MOSFET drivers (Chg/Dsg)

• Compatible with 15V to 75V battery packs
• Hot-swap packs safely, soft start and charge management with Linear-Mode FET control
• Strong drive ability

Protections

• Over-Voltage Protection
• Discharge Current Protection
  • Discharge-Over-Current 1 (DOC1)
  • Discharge-Over-Current 2 (DOC2)
  • Short-Circuit (SC)
• Charge Current Protection
• Internal Die Over-Temperature Protection

Simultaneous Multi-Cell Balance

Cell-Tap-Open (CTO) Detection

SPI Serial Communications Bus Interface

Low Power Consumption

• Active mode: < 150uA (Without CC)
• Standby mode: < 12uA
• Shutdown mode: < 1uA

General Description

The OZ3717 is a highly integrated, low-cost Digital Front End (DFE) IC designed for 10 to 17 serial cells in battery packs for high cell count and battery-powered applications. It integrates a 14-bit high precision Successive Approximation (SAR) Analog to Digital Converter (ADC) for detecting cell voltages, temperature, and charge/discharge current. For Coulomb-Counting measurements, it uses a 16-bit Sigma-Delta (∆) current ADC.

The OZ3717 features a standalone safety engine that performs high accuracy and high reliability protections for safety events, including Over-Voltage (OV), Charge Over-Current (COC), Discharge Over-Current (DOC1 and DOC2), Short-Circuit (SC), and optional Under-Voltage (UV). The INT pin is activated to notify the Host microcontroller of a safety event. An external Host (Microcontroller) can release from these protection states.

The IC integrates a charge-pump circuit to drive high-side N-channel charge and discharge MOSFETs with strong driving capability for fast response. It also provides linear mode control for either charge FET or discharge FET, enabling automatic balancing and hot swapping for multiple battery packs.

The OZ3717 supports Cell Balance and Cell-Tap-Open (CTO) detection, which can be controlled by an external host. It also integrates Internal Over-Temperature protection to prevent overheating during extreme conditions.

Applications

• ESS/UPS
• Garden Tools, Power Tools
• E-Bikes, E-Scooters, Pedelec and Pedal-Assist Bicycles
• LEV (Light Electric Vehicles)