4S-50A LiFePO₄ (LFP) BMS — JBD Model

Overview
The JBD 4S-50A BMS is designed for 4-series LiFePO₄ battery packs with a nominal voltage of 12.8V. It supports continuous discharge currents up to 50A and provides comprehensive protection, passive balancing, and smart communication features for safe battery operation.

Specifications

• Cell Configuration: 4S (4 cells in series)

• Battery Chemistry: LiFePO₄ (LFP)

• Nominal Voltage: 12.8V (3.2V × 4)

• Maximum Continuous Current: 50A

• Peak Current: Typically 70A to 90A (short bursts)

• Balancing Type: Passive balancing

• Balance Current: Approximately 30mA to 80mA

• Protection Features:

  • Over-voltage protection

  • Under-voltage protection

  • Over-current protection

  • Short-circuit protection

  • Over-temperature protection

  • Under-temperature protection

• Communication:

  • Bluetooth (optional)

  • UART / RS485 / CAN

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

Features

• Individual cell voltage monitoring and balancing

• Automatic passive cell balancing during charging

• Full protection for voltage, current, and temperature extremes

• Bluetooth-enabled monitoring and configuration via JBD app (model dependent)

• Compact and durable design suitable for small to mid-power battery packs

Applications

• 12.8V LiFePO₄ battery packs

• Electric scooters, power tools, and compact EVs

• Solar energy storage and off-grid power solutions

• Portable battery packs and backup systems

• DIY 4S LiFePO₄ battery projects

Important Notes

• Intended for LiFePO₄ (3.2V per cell) chemistry only

• Proper wiring of balance leads and main terminals is essential

• Charger and load currents should remain within 50A continuous rating

• Bluetooth and smart features available depending on model

• Adequate cooling recommended under sustained high load