BMS 14S Li-Ion 120A 3.7V Smart Bluetooth

Smart BMS Jiabaida 14S 120A

This BMS (balancing management system) is designed for 14S batteries. You can monitor and edit the battery readings with the device using Bluetooth connection and an app on your phone, or via USB connection with a PC. The Smart BMS is manufactured by Jiabaida (JBD) and will provide your battery with overcharge and discharge protection as well as temperature protection.

Technical Specifications:

• Operating voltage range: 37.8 V ~ 59.5 V
• Constant charging current: 120 A
• Constant discharging current: 120 A
• Maximum battery pack charging voltage: 58.8 V
• Overcharge protection tripping limit voltage: 4.25 V
• Overcharge protection tripping delay: 2000 ms
• Overcharge protection tripping limit voltage: 4.15 V
• Limit voltage for undercharge protection tripping: 2.7 V
• Undercharge protection tripping delay: 2000 ms
• Limit voltage for undercharge protection tripping: 3.0 V
• Limit current for charging current protection tripping: 130 A
• Charging current protection tripping delay: 7 s ~ 13 s
• Current protection tripping condition during charging: 32 s
• Current protection tripping limit current during discharging (I): 130 A
• Current protection tripping delay during discharging (I): 7 s ~ 13 s
• Current protection tripping limit current during discharging (II): 600 A ~ 700 A
• Tripping delay of current protection during discharge (II): 100 ms ~ 500 ms
• Tripping condition of current protection during discharge (I + II): recovery after 32 s
• Tripping delay of short-circuit protection: 200 μs ~ 600 μs
• Tripping condition of short-circuit protection: load tripping and recovery
• Limit voltage for tripping balancing: 3.95 V ~ 4.05
• Limit voltage difference for switching on balancing: 30 mV
• Balancing mode: balancing while charging
• Balancing current: 40 mA ~ 60 mA
• Maximum temperature for switching on thermal protection while charging: 65 °C
• Limit maximum temperature for switching off thermal protection while charging: 55 °C
• Lowest temperature for switching on temperature protection when charging: -5 °C
• Lowest limit temperature for switching off temperature protection when charging: 0 °C
• Highest temperature for switching on temperature protection when discharging: 75 °C
• Highest limit temperature for switching off temperature protection when discharging: 65 °C
• Lowest temperature for switching on thermal protection during discharge: -10 °C
• Lowest limit temperature for switching off thermal protection during discharge: 0 °C
• Internal resistance of the discharge circuit: 5 mΩ
• Self-current consumption in normal mode (with load): 20 mA
• Self-current consumption in quiescent mode (without load): 200 μA
• Sleep mode switching 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

The BMS package includes connection cables, temperature sensor and Bluetooth module (or integrated BT depending on the BMS model).

• 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.