The JK Smart BMS (Battery Management System) is an intelligent management system designed for large-capacity series Li-ion battery packs. It integrates various functions to ensure the safe and efficient operation of battery systems.
Function Description:
The BMS provides comprehensive battery management, including voltage acquisition, high-current active balancing, and multiple protection mechanisms. It safeguards against over-charge, over-discharge, over-current, and over-temperature conditions. A coulomb meter is integrated for accurate capacity tracking. For communication and remote monitoring, the BMS features Bluetooth connectivity and supports GPS remote functionality. It is versatile and can be applied to various battery chemistries, including Li-ion, Lithium Iron Phosphate (LiFePO4), and LTO batteries.
A key feature of the JK BMS is its energy transfer type active balancing technology, which holds independent intellectual property rights. This technology enables a maximum continuous balancing current of 2A. High-current active balancing is crucial for maximizing battery consistency, extending battery range, and slowing down battery aging.
The BMS is compatible with smart Android and iOS applications, allowing users to connect via Bluetooth. Through the app, users can monitor the battery's working status, modify operating parameters, and control charging and discharging switches. Its compact size, ease of operation, and full-featured design make it suitable for a wide range of applications, including small sightseeing vehicles, mobility scooters, shared cars, high-power energy storage systems, base stations, backup power, and solar power plants.
Important Technical Specifications (for JK-B1A8S20P/JK-B2A8S20P):
General:
- Operating Temperature Range: -20℃ to 70℃
- Power Requirements: 10~40V
- Power Consumption: 25mA@40V (balanced state), 20mA@40V (unbalanced state)
- Dimensions: 153 mm x 126 mm x 17.6 mm
- Weight: 349g
- Port Type: Common Port (for charge and discharge)
Battery Configuration:
- Li-ion Battery Strings: 3~8
- LiFePO4 Battery Strings: 4~8
- LTO Battery Strings: Not supported
- Single Cell Voltage Range: 1~5 V
- Voltage Acquisition Accuracy: ±5 mV
Current Management:
- Continuous Discharge Current: 200A
- Maximum Discharge Current: 350A
- Overcurrent Protection (Adjustable): 10~200 A
- The Main Circuit Resistance: 0.3mΩ
Balancing:
- Balancing Mode: Active Balancing
- Balancing Current: 1A (JK-B1A8S20P) / 2A (JK-B2A8S20P)
- Balance Trig. Volt.(V): Default 0.010V (adjustable)
- Start Balance Vol.(V): Default 3.00V (adjustable)
- Max Balance Cur.(A): Default 2.0A (adjustable)
Voltage Protection:
- Overcharge Protection Voltage (Adjustable): 1.2~4.35 V
- Overcharge Release Voltage (Adjustable): 1.2~4.35 V
- Over-discharge Protection Voltage (Adjustable): 1.2~4.35 V
- Over-discharge Recovery Voltage (Adjustable): 1.2~4.35 V
- Cell OVP(V): Default 3.600V (adjustable)
- Cell OVPR(V): Default 3.400V (adjustable)
- Cell UVP(V): Default 2.600V (adjustable)
- Cell UVPR(V): Default 3.000V (adjustable)
- Power Off Vol.(V): Default 2.50V (adjustable)
Temperature Management:
- Temperature Detection Ports: 3
- Temperature Protection: Yes
- Charge OTP(C): Default 60°C (adjustable)
- Charge OTPR(C): Default 55°C (adjustable)
- Charge UTP(C): Default -20°C (adjustable)
- Charge UTPR(C): Default -10°C (adjustable)
- Discharge Over-temperature Protection: Default 60°C (adjustable)
- Discharge Over-temperature Recovery: Default 55°C (adjustable)
- MOS Over-temperature Protection: 75°C (fixed)
- MOS Over-temperature Protection Recovery: 65°C (fixed)
Other Protections:
- Short Circuit Protection: Yes
- Overcurrent Release Time (Adjustable): 2~120S
- Charge OCP Delay(S): Default 30s (adjustable)
- Charge OCPR Time(S): Default 60s (adjustable)
- Discharge OCP Delay(S): Default 30s (adjustable)
- Discharge OCPR Time(S): Default 60s (adjustable)
- SCP Delay(us): Default 60s (adjustable)
- SCPR Time(S): Default 60s (adjustable)
Connectivity & Display:
- Coulometer: Yes
- Bluetooth: Support Android phone / iPhone
- GPS Ports: Support
- Other Interfaces (Customizable): RS485, CAN, Heating, LCD display
Usage Features:
- APP Control: The BMS features a smart APP for Android and iOS, allowing users to monitor battery status, modify parameters, and control charging/discharging switches via Bluetooth.
- Easy Power-up: The BMS does not have a physical power-on switch. It is designed for charging activation mode, meaning it powers on and starts working once a charger (with voltage 5V higher than battery voltage) is connected after battery assembly.
- Parameter Customization: Users can adjust various operating parameters through the APP, such as cell count, battery capacity, balancing trigger voltage, and protection thresholds. A separate password ("123456" by default) is required for parameter modification, distinct from the Bluetooth connection password ("1234" by default).
- Voltage and Current Calibration: The APP provides functions to calibrate the accuracy of BMS voltage and current measurements against manually measured values.
- Firmware Updates: While not explicitly detailed, the smart nature of the BMS suggests potential for firmware updates through the APP for improved functionality.
- Real-time Monitoring: The APP displays real-time battery status, including total voltage, current, individual cell voltages, temperatures (MOS, Battery T1, T2), battery power, remaining capacity, cycle count, and balancing status.
- Active Balancing: The BMS employs active balancing to maintain cell voltage consistency, which is crucial for battery longevity and performance.
- Multiple Battery Type Support: The BMS can be configured for Li-ion, LiFePO4, and LTO battery types with one-click settings in the APP, applying default parameters for each chemistry.
- Safety Alarms: The system generates alarms for various fault conditions, such as over-voltage, under-voltage, over-current, and over-temperature, and takes protective actions like turning off charging/discharging MOS.
Maintenance Features:
- Self-Test for Balancing Wires: The BMS performs a self-test of balancing wire resistances. If a resistance exceeds a certain value, it indicates a wrong connection or poor contact, and balancing will not initiate, preventing potential issues.
- Factory Reset: The APP includes a "Factory Restore" option to revert all settings to their default values, which can be useful for troubleshooting or reconfiguring the BMS.
- Clear Wiring Diagrams: The manual provides clear wiring diagrams for different battery configurations (e.g., 4S, 8S) to aid in correct installation and minimize errors.
- Pre-use Inspection Guidelines: The manual emphasizes the importance of inspecting the packaging for damage and carefully verifying all cable connections with a multimeter before powering on the BMS to prevent abnormal operation or damage.
- Environmental Storage Conditions: Specific guidelines are provided for storing packaged products, including temperature (0°C~35°C), humidity (not more than 80%), and avoiding corrosive gases, strong vibrations, and magnetic fields.
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