8S-40A LiFePO₄ (LFP) BMS — JBD Model

Overview
The JBD 8S-40A BMS is designed for 8-series LiFePO₄ (LFP) battery packs, with a nominal voltage of 25.6V. It supports continuous discharge currents up to 40A and provides reliable battery protection, passive balancing, and optional smart communication features like Bluetooth or UART.

Specifications

• Cell Configuration: 8S (8 cells in series)

• Battery Chemistry: LiFePO₄ (LFP)

• Nominal Voltage: 25.6V (3.2V × 8)

• Maximum Continuous Current: 40A

• Peak Current: 50A to 60A (short bursts)

• Balancing Type: Passive balancing

• Balance Current: Approx. 30mA–80mA

• Protection Features:

  • Over-voltage protection

  • Under-voltage protection

  • Over-current protection

  • Short-circuit protection

  • Over-temperature protection

  • Under-temperature protection

• Communication Options (varies by model):

  • Bluetooth

  • UART / RS485 / CAN

• Operating Temperature Range: -20°C to +60°C

Features

• Real-time monitoring of each cell voltage

• Automatic passive balancing during charging

• Full protection for voltage, current, and temperature issues

• Bluetooth support via JBD/Xiaoxiang app (on supported models)

• Compact, efficient design for medium-power applications

Applications

• 25.6V LiFePO₄ battery packs

• Medium-power electric bikes, scooters, and mobility devices

• Solar energy storage and backup systems

• DIY battery projects requiring 40A discharge

• Portable power packs and inverter systems

Important Notes

• Only for use with LiFePO₄ (3.2V per cell) batteries

• Balance and power connections must be wired correctly

• Ensure load and charger current are within 40A continuous rating

• Optional features depend on model variant (e.g., Bluetooth, UART)

• Adequate cooling is recommended for prolonged high-load use