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

Overview:
The 7S 20A JBD Li-ion BMS is a reliable battery management system designed for 7-series lithium-ion battery packs, providing 20 amps continuous discharge current. Manufactured by JBD (JingBangDian), it offers comprehensive battery protection and cell balancing to ensure safety and extend battery life.

Key Specifications:

• Battery Configuration: 7 cells 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: Around 2.8 V per cell (over-discharge protection)

• Continuous Discharge Current: 20 A

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

• Short Circuit Protection: Immediate shutdown (microseconds response time)

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

• Quiescent (Idle) Current: Very low microampere range

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

• Physical Dimensions: Compact size; dimensions vary by specific JBD model

• Communication Interface: Some JBD models include UART or Bluetooth for monitoring and configuration

• Protection Features: Overcharge, over-discharge, overcurrent, short circuit, cell balancing, temperature protection (on some models)

Additional Features:

• Configurable Settings: Many JBD BMS units allow configuration of parameters such as overcurrent thresholds and balancing voltage via software or Bluetooth.

• Compatibility: Designed primarily for Lithium-ion (Li-ion) and NMC batteries. May support other chemistries with adjusted settings.

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

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