BMS 4S LiFePO4 120A 3,2V Smart Bluetooth

JBD BMS 4S 120A: Comprehensive Battery Protection & Smart Monitoring

For absolute control over your energy independence, you need a smart battery management system. This BMS acts as the intelligent brain of your 12V LiFePO4 battery. It ensures comprehensive protection against overcharging, deep discharge, or short circuits, while advanced JBD BMS technology with active balancing significantly extends the lifespan of individual cells.

The system supports a continuous charging current of 120A, enabling ultra-fast charging from powerful sources, and a continuous discharging current of 100A for reliable power even for demanding appliances. Thanks to the integrated Bluetooth, you can monitor the state of charge or cell voltages in real-time directly on your smartphone.

Technical Specifications

• Operating voltage range: 10.0 V ~ 14.6 V
• Constant charging current: 120 A
• Constant discharge current: 100 A
• Maximum charging voltage of the battery pack: 14.6 V
• Limit voltage for overcharge protection: 3.65 V
• Overcharge protection switch-on delay: 2000 ms
• Limit voltage for tripping overvoltage protection: 3.5 V
• Undervoltage protection tripping limit: 2.5 V
• Undervoltage protection tripping delay: 2000 ms
• Limit voltage for tripping underrun protection: 3.0 V
• Limit current for tripping the undercurrent protection during charging: 130 A
• Delay of current protection tripping during charging: 2 s
• Current protection tripping condition during charging: 32 s
• Current protection tripping limit current during discharge (I): 130 A
• Current protection tripping delay during discharge (I): 2 s
• Current protection tripping limit current during discharge (II): 400 A
• Tripping delay of current protection during discharge (II): 100 ms ~ 500 ms
• Discharge current protection tripping condition (I + II): recovery after 32 s
• Short-circuit protection tripping delay: 200 μs ~ 500 μs
• Short-circuit protection trip condition: load off and recovery
• Limit voltage for tripping balancing: 3.35 V ~ 3.45 V
• Limit voltage difference for balancing switching: 30 mV
• Balancing mode: charging balancing
• Balancing current: 40 mA ~ 60 mA
• Maximum temperature for activation of thermal protection during charging: 65 °C
• Maximum limit temperature for switching off the temperature protection during charging: 55 °C
• Lowest temperature for switching on temperature protection during charging: -5 °C
• Lowest temperature limit for switching off temperature protection during charging: 0 °C
• Maximum temperature for activation of thermal protection during discharge: 75 °C
• Maximum limit temperature for switching off thermal protection during discharge: 65 °C
• Lowest temperature for activation of thermal protection during discharge: -10 °C
• Limit lowest temperature for switching off thermal protection during discharge: 0 °C
• Internal resistance of the discharge circuit: 5 mΩ
• Current consumption in normal mode (with load): 20 mA
• Idle current consumption (no load): 200 μA
• Sleep mode switchover delay and conditions: after 10 s without current load, communication or protection mode
• Normal operating temperature range: -20 °C ~ 70 °C
• Storage temperature range at relative humidity <90%: -40 °C ~ 85 °C
• Dimensions (W × H × D): 102 × 138 × 18 mm

Before first use, the negative terminal of the battery must first be connected to the BMS. Then the balance connector, which is already connected to the individual battery cells, needs to be connected. Failure to follow this connection sequence may result in permanent damage to the BMS.

Connection cables are included in the BMS package. Bluetooth is integrated in the BMS.

Mobile app for JBD BMS

Monitor individual battery cell voltage, current or temperature and other parameters in real time. This Smart BMS has integrated Bluetooth technology that allows you to control and monitor your battery directly from your mobile phone or tablet. Use the QR code below to get the app.