11S-20A LiFePO₄ (LFP) BMS — JBD Model

Overview

The JBD 11S-20A BMS is designed for lithium iron phosphate (LiFePO₄) battery packs with 11 cells in series. It supports continuous currents up to 20A and provides essential protection and balancing functions to keep your battery pack safe and healthy.

Specifications

• Cell Configuration: 11S (11 cells in series)

• Battery Chemistry: LiFePO₄ (LFP)

• Nominal Voltage: ~35.2V (3.2V nominal per cell × 11)

• Maximum Continuous Current: 20A

• Peak Current: Typically higher for short bursts (e.g., 30A – 40A)

• Balancing: Passive balancing of individual cells

• Balance Current: Approximately 30-50mA (model dependent)

• Protection Features:

  • Over-voltage protection

  • Under-voltage protection

  • Over-current protection

  • Short-circuit protection

  • Temperature protection (over- and under-temperature)

• Communication Interfaces:

  • Optional Bluetooth module (for monitoring and configuration)

  • UART / RS485 / CAN (depending on version)

• Operating Temperature Range: -20°C to +70°C

Features

• Continuous real-time monitoring of each cell voltage

• Automatic cell balancing during charging

• Safety cut-offs to prevent battery damage

• Compact and robust design from JBD, widely trusted in DIY and commercial battery projects

• Optional Bluetooth connectivity for mobile app monitoring (via JBD BMS app)

Applications

• Electric bicycles and scooters

• Solar energy storage systems

• Portable power stations

• DIY lithium iron phosphate battery packs

• Low-to-medium power electric vehicles

Important Notes

• Designed exclusively for LiFePO₄ batteries — do not use with other chemistries.

• Proper wiring and connection to all cell terminals is critical for safe operation.

• Ensure the BMS current rating (20A) fits your application’s load and charging requirements.

• Cooling may be required in high-temperature or high-load environments.

• JBD BMS units often support firmware updates and Bluetooth monitoring—check your specific model’s documentation.