20S 40A JBD Li-ion Smart BMS

Product Description:

The 20S 40A JBD Li-ion Smart BMS is an advanced Battery Management System built for 72V lithium-ion battery packs (20 cells in series). It combines robust safety features with smart monitoring and control capabilities via UART, RS485, or Bluetooth (optional module required). This BMS includes passive balancing, temperature sensing, and data logging support, making it ideal for smart energy systems, electric vehicles, solar battery banks, and more.

Key Features:

• Supports 20S (72V nominal) Li-ion battery configuration

• 40A continuous discharge current

• Smart communication: UART, RS485, optional Bluetooth

• Full protection: overcharge, over-discharge, overcurrent, short circuit, temperature

• Passive balancing for improved battery health

• Multiple NTC temperature sensor support

• Real-time monitoring and data logging via PC or Android app

• EEPROM memory for system configuration and fault logs

Technical Specifications:

• Battery Type: Lithium-ion (3.7V nominal per cell)

• Series Configuration: 20S

• Nominal Voltage: 72V

• Maximum Charge Voltage: 84.0V (4.2V × 20 cells)

• Continuous Discharge Current: 40A

• Balance Current: ~30–60mA

• Overcharge Protection Voltage: ~4.20V ± 0.025V per cell

• Overdischarge Protection Voltage: ~2.8V ± 0.08V per cell

• Short Circuit Protection: Yes

• Overcurrent Protection: Configurable

• Temperature Protection: Yes (NTC sensor support)

• Communication Interfaces: UART / RS485 / Bluetooth (external module)

• Software Support:

  • PC Software: via USB to UART adapter

  • Android App: via Bluetooth module

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

Applications:

• Electric bikes, scooters, and motorcycles

• 72V solar and off-grid battery storage systems

• DIY lithium-ion battery packs

• Portable power stations and backup systems

• Smart energy monitoring and automation