7S 20A JBD Li-ion Battery Management System (BMS)

Overview:
The 7S 20A JBD Li-ion BMS is a high-quality battery management system designed to protect and manage 7-series lithium-ion battery packs with a continuous discharge current rating of 20 amps. Manufactured by JBD (JingBangDian), it ensures battery safety, longevity, and efficient operation through comprehensive protection and cell balancing.

Key Specifications:

• Battery Configuration: 7 cells connected in series (7S)

• Nominal Voltage: Approximately 25.9 V (3.7 V per cell × 7)

• Maximum Charge Voltage: 29.4 V (4.2 V per cell max)

• Discharge Cutoff Voltage: About 2.8 V per cell (over-discharge protection)

• Continuous Discharge Current: 20 A

• Peak/Overcurrent Protection: Typically triggers between 30–40 A

• Short Circuit Protection: Instantaneous shutdown with microseconds response time

• Cell Balancing: Passive balancing with 30–80 mA current per cell

• Quiescent Current: Ultra-low microampere range to preserve battery life

• Operating Temperature Range: -20°C to +60/65°C

• Physical Dimensions: Compact size, varies by model

• Communication Interface: Many JBD models include UART or Bluetooth for real-time monitoring and configuration

• Protection Features: Overcharge, over-discharge, overcurrent, short circuit, cell balancing, and temperature protection (depending on model)

Additional Features:

• Configurable Settings: Adjustable parameters for overcurrent, overvoltage, undervoltage, and balancing via software or Bluetooth on compatible models.

• Chemistry Compatibility: Optimized for Lithium-ion (Li-ion) and NMC battery chemistries.

• Port Design: Available with separate or combined ports for charging and discharging based on the model.

Applications:
Suitable for electric bikes, scooters, portable energy storage systems, power tools, and other lithium-ion battery-powered applications requiring 7S battery management at 20A continuous current.