1. Product Overview
The JIKONG JKBMS V19 is an intelligent protection board designed for large-capacity series lithium battery packs. It integrates advanced features such as voltage acquisition, high-current active balancing, overcharge, over-discharge, overcurrent, over-temperature protection, coulomb metering, Bluetooth communication, and host computer monitoring. This system is suitable for various battery types including LiFePO4, ternary lithium, and LTO batteries.
The BMS utilizes energy transfer active balancing technology, capable of achieving a continuous balance current of 1A or 2A, depending on the model. This technology significantly enhances battery consistency, extends battery life, and delays aging. A dedicated mobile application (APP) for Android and iOS operating systems allows users to monitor battery status, modify parameters, and control charge/discharge switches via Bluetooth. The compact design, ease of operation, and comprehensive functionality make it ideal for high-power energy storage systems, base station backup power supplies, and solar power station battery packs.
2. Specifications
2.1. Functional Characteristics
- LED Bluetooth status indicator
- APP Bluetooth remote operation
- Battery capacity calculation
- Supports PC operations
- High precision voltage acquisition (±3mV)
- High precision current acquisition
- Support information screen display
- Accurate time logging
- Support RS485 communication
- Support CAN communication
- Support heating function
- Alarm dry contact function
- Charge overcurrent protection
- Charge overvoltage protection
- Charge over temperature protection
- Low temperature protection during charge
- Discharge overcurrent protection
- Discharge undervoltage protection
- Discharge over temperature protection
- Short circuit protection
- Battery parallel current limiting function
2.2. Technical Parameters
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage | 20-70 | V |
| Standby Power Consumption | 12 | mW |
| Operating Power Consumption | 1100 | mW |
| Operating Temperature | -30 to 70 | °C |
| Maximum Number of Collection Strings | 16 | Strings |
| Maximum Balancing Current | 1A / 2A | A |
| Maximum Charging Current | 100A / 150A / 200A | A |
| Maximum Discharge Current | 100A / 150A / 200A | A |
| Maximum Instantaneous Current | 200A / 300A / 400A | A |
| Maximum Internal Loop Resistance | 1mΩ / 0.45mΩ / 0.35mΩ | mΩ |
| Protective Plate Size | 300 × 100 × 24 | mm |
| Finished Weight | 1000 | g |
2.3. Product Dimensions
The main BMS board has dimensions of 300mm (length) × 100mm (width) × 24mm (height).
3. Components and Interfaces
The JKBMS V19 includes a main board and an interface board, designed for user convenience and comprehensive functionality.
3.1. Packing List
3.2. Main Board Connectors
The main board features various connectors for power input, output, and communication. Refer to the detailed diagram for specific pin definitions.
3.3. Interface Board
The interface board provides LED indicators, a reset switch, DIP switches for addressing, dry contacts, and communication ports (CAN, RS485). These components facilitate monitoring, configuration, and external device control.
4. Installation and Wiring
The JIKONG JKBMS V19 is suitable for 7-16 series lithium battery packs. The specific wiring method depends on the number of cells in your battery pack. Always ensure all connections are secure before powering on the BMS.
4.1. General Installation Steps
- Connect all necessary cables to the BMS.
- Insert the cables into the corresponding ports on the BMS.
- Connect the B- (total negative electrode) and P- (total positive electrode) lines to the battery pack.
- Important: If your setup includes two B8 cables, only the first B8 line needs to be connected. The second B8 cable is not required.
4.2. Wiring Diagrams
5. Device Activation
Before powering on the protection board, carefully verify the following:
- Confirm that the balance cables are correctly connected.
- Ensure that the P- and B- connections are correct.
- Verify that the protection board is securely fixed to the battery cells.
Once all checks are complete, you can power on the protection board. The BMS does not have a physical power-on switch. It is designed for charging activation mode, meaning the charger voltage must be 2V higher than the battery voltage. After the battery assembly is complete, connect the charger to activate the protection board.
Alternatively, the BMS can be activated via a key or display. If you have an optional display screen and button, simply insert the cable into the display interface and press the button to activate the device.
6. Operation
6.1. APP Installation and Usage
The JIKONG BMS features a mobile application for Android and iOS devices, allowing for remote monitoring and parameter adjustments. To install the APP, scan the QR code below. Android Version 7 or higher is required.
The APP provides a multi-screen display for data connection, allowing you to view voltage, current, temperature, SOC, alarms, and cycle counts at a glance. You can also use PC software or a dedicated JIKONG home storage display for monitoring.
6.2. Active Equalization
The BMS employs active equalization to transfer energy from high-voltage cells to low-voltage cells, ensuring battery consistency. Before using this function, set basic battery parameters in the APP, including cell count, battery capacity, and trigger equalization differential pressure (default value can be retained). The default balance current is 1A/2A. It is recommended that the balance current does not exceed 0.2C of the battery capacity. The balancing function can be turned off via the APP if not needed.
6.3. Heating Function
The BMS includes a standard heating function with a 10A current, utilizing a resistance heater or heating film to warm the battery at low temperatures. This prevents reduced battery activity and charging/discharging failures in cold conditions. Users can activate or deactivate this function via the APP. For secondary protection, it is recommended to install a normally closed temperature control switch (45-65°C) in series with the heating circuit.
6.4. Dry Contact Function
Two dry contacts are provided to control external devices such as alarms or fans. When the BMS detects an over-temperature, overcharge, or over-discharge state, the alarm interface can switch the status of the dry contact to trigger an alarm or activate a fan for cooling. Trigger conditions can be configured via the APP.
6.5. Communication Functions (RS485, CAN, Parallel)
The BMS supports CAN and RS485 communication. The default CAN communication rate is 250K. Users can select the appropriate protocol in the APP based on their inverter brand and specifications. There are two RS485 communication interfaces: RS485-1 for inverter communication and RS485-2 for parallel connection and communication with an upper computer. The default baud rate is 115200. The communication address for parallel operation (0-15) is set using DIP switches on the interface board.
6.6. Intelligent Sleep
The BMS features an intelligent sleep function to reduce energy consumption when in standby (charging/discharging current less than 1A for 26 consecutive hours). This function can be enabled or disabled via the APP. To reactivate the BMS from sleep, press the button or connect a charger.
7. Protection Features and Troubleshooting
The JIKONG JKBMS V19 is equipped with multiple protection mechanisms to ensure the safety and longevity of your battery system. Most protection parameters can be adjusted via the mobile APP.
7.1. Overvoltage Protection (Charge)
The BMS will stop charging if any cell's voltage exceeds the set overvoltage protection value. Charging resumes when all cell voltages drop below the recovery threshold. Parameters are adjustable in the APP.
7.2. Undervoltage Protection (Discharge)
If any cell's voltage drops below the set undervoltage protection value during discharge, the BMS will cut off discharge. Discharge resumes when all cell voltages rise above the recovery threshold. An automatic shutdown voltage is also configurable to protect cells from deep discharge.
7.3. Overcurrent Protection (Charge & Discharge)
The BMS monitors charging and discharging currents. If the continuous current exceeds the set limit for a specified delay, the BMS will interrupt the operation. It will resume after the overcurrent release time. Parameters for continuous current, delay, and release time are adjustable in the APP.
7.4. Overtemperature Protection
The BMS protects against overtemperature during both charging and discharging. If the temperature exceeds the set limit, the BMS will stop the respective operation. It resumes when the temperature drops below the recovery threshold. All temperature parameters are adjustable in the APP.
7.5. Low Temperature Protection (Charge)
To prevent damage from charging at low temperatures, the BMS will stop charging if the temperature falls below the set low temperature protection value. Charging resumes when the temperature rises above the recovery threshold. In extremely cold environments, using the heating function is recommended.
7.6. Short Circuit Protection
The BMS includes short circuit protection. While the trigger current is fixed, the delay and recovery time can be adjusted via the APP. If a short circuit occurs during charging or discharging, the BMS will interrupt the operation and resume after the recovery time. Adjusting the delay can help prevent false triggers due to high instantaneous currents from certain loads or chargers.
7.7. Emergency Switch
In case of critical faults like over-temperature, over-discharge, over-charge, or cell string drops, activating the emergency switch via the APP will allow the BMS to continue charge and discharge operations for 30 minutes. This feature is designed to provide a temporary operational window to prevent critical situations, such as being stranded on the road.
7.8. Charge Current Limiting
The BMS features a standard charge current limiting function. If an overcurrent condition occurs during charging, the BMS will limit the charging current to approximately 10A to protect the battery.
8. User Tips
- Regularly check the LED indicators on the interface board to quickly assess the BMS's operational status and remaining battery power.
- Utilize the mobile APP for precise parameter adjustments and real-time monitoring to optimize battery performance and longevity.
- For parallel battery pack configurations, ensure each BMS has a unique address set via the DIP switches and use the JIKONG upper computer for centralized monitoring.
- In cold climates, enable the heating function and consider installing an external temperature control switch for enhanced battery protection.
- If experiencing frequent short-circuit protection triggers, try adjusting the short circuit protection delay in the APP, especially when connecting loads with high inrush currents.
9. Support
For detailed parameter settings, advanced troubleshooting, and comprehensive technical information, please refer to the complete user manual PDF provided by JIKONG. This document contains in-depth explanations and diagrams not fully covered in this summary.
For further assistance, please contact JIKONG customer support.
