1. Introduction
The JIKONG JK-BD6A20S20P Smart Battery Management System (BMS) is an advanced active balance management system designed for Li-ion, LiFePO4, and LTO battery packs ranging from 8S to 24S configurations. This intelligent BMS provides comprehensive protection functions including overcharge, overcurrent, and short circuit protection, ensuring the safety and longevity of your battery. With a 100A continuous charge/discharge current and a 0.6A active balance current, it is suitable for various applications such as power BMS, energy storage BMS, and 3C digital BMS.
This manual provides detailed instructions for the proper installation, operation, and maintenance of your JIKONG JK-BD6A20S20P Smart BMS.
2. Product Overview
The JIKONG JK-BD6A20S20P BMS is engineered for high-efficiency performance and reliability. It features a robust design with selected core components, including a Jikong MCU and MOS, housed within a cooling aluminum alloy casing for optimal thermal management.
Key Features:
- Smart Management: Bluetooth (BT) connectivity for mobile app monitoring and control.
- Active Balancing: 0.6A active balance current for efficient cell voltage equalization.
- Comprehensive Protection: Overcharge, overcurrent, and short circuit protection.
- Rich Interfaces: Supports RS485/CAN communication, NTC temperature sensors, soft switch, SOC indicator, and key switch.
- High Current Capability: 100A continuous charge/discharge current, with a maximum discharge current of 200A.
Internal Structure:
Application Scenarios:
This BMS is versatile and can be used in a wide range of applications, including:
- E-bikes
- Electric Tricycles
- Low Speed Quads
- Forklifts
- Cleaning Cars
- Tourist Cars
- Industrial Drones
- Scooters
- RV Energy Storage
- Energy Storage Cabinets
- Power Banks
- Power Tools
3. Specifications
The following table details the technical specifications of the JIKONG JK-BD6A20S20P Smart BMS:
| Technical Index | Value (JK-BD6A20S20P) |
|---|---|
| Number of Battery Strings (Li-ion/LiFePO4/LTO) | 8S-24S |
| Balance Method | Active Balance (Full State On) |
| Balance Current | 0.6A |
| Conductive Resistance in Main Circuit | 1mΩ |
| Continuous Discharge Current | 100A |
| Continuous Charge Current | 100A |
| Maximum Discharge Current (MAX 200A) | 200A |
| Over Charge Protection Current (A) | 10-100A |
| Other Interfaces (Customized) | RS485, CANBUS, HEAT |
| Size (mm) | 162 x 102 x 20mm |
| Wiring Output | Common Port BMS |
| Single Cell Voltage Range | 1-5V |
| Voltage Detection Accuracy | ±5mV |
| Over Charge Protection Voltage | 1.2-4.35V Adjustable |
| Over Charge Release Voltage | 1.2-4.35V Adjustable |
| Over Current Detect Delay | 2-120S Adjustable |
| Over Discharge Protection Voltage | 1.2-4.35V Adjustable |
| Over Discharge Release Voltage | 1.2-4.35V Adjustable |
| Quantity of Temperature Detection | 3 Pcs |
| Temp Protection | Yes |
| Short Circuit Protection | Yes |
| Coulomb Counter | Yes |
| Bluetooth Function | Support for Android/iOS phone |
Physical Dimensions:
4. Package Contents
Upon opening your JIKONG JK-BD6A20S20P Smart BMS package, please verify that all the following items are included:
- 1 x JIKONG Smart BMS Unit
- 1 x Switch (50cm long)
- 1 x NTC Temperature Sensor (40cm long)
- 1 x Sampling Line B (70cm long)
- 1 x Sampling Line A (70cm long)
5. Setup & Installation
Proper installation is crucial for the safe and effective operation of your BMS. Please follow these instructions carefully. If you are unsure about any step, consult a qualified professional.
Safety Precautions:
- Always disconnect the battery pack from any power sources before installation.
- Wear appropriate personal protective equipment (PPE), including insulated gloves and eye protection.
- Ensure all connections are secure and properly insulated to prevent short circuits.
- Verify battery cell polarity before connecting balance wires. Incorrect connections can damage the BMS and battery.
Connection Points:
- B- (Battery Negative): Connects to the total negative terminal of your battery pack.
- P- (Power Negative): Connects to the negative terminal of your load (e.g., motor, inverter) and charger.
- B+ (Battery Positive): Connects to the total positive terminal of your battery pack.
- Balance Wires (B1-B24): Connect these wires to the positive terminals of each individual battery cell, starting from B1 (first cell positive) up to B24 (last cell positive). Ensure correct sequence.
- NTC (Temperature Sensor): Connect the provided NTC sensor to the designated port to monitor battery temperature.
- RS485/CAN: For communication with external systems or displays.
- GPS: For GPS module connection (if applicable).
- Display/Switch: For connecting an external display unit or a soft switch.
- Hot: For heating element control (if applicable).
Wiring Diagram:
Refer to the detailed wiring diagram below for connecting the BMS to your battery pack and external components. This diagram illustrates a 16-string cell configuration as an example. Adjust connections according to your specific battery string count (8S-24S).
- Connect the main negative cable (B-) from the BMS to the total negative terminal of your battery pack.
- Connect the main positive cable (B+) from the BMS to the total positive terminal of your battery pack.
- Connect the balance wires (B1, B2, ..., Bx) from the BMS to the positive terminal of each corresponding cell in sequence. Start with B1 for the first cell's positive, B2 for the second cell's positive, and so on, up to the last cell.
- Connect the NTC temperature sensors to the battery pack, typically placed between cells to monitor temperature variations. Plug the NTC cable into the designated port on the BMS.
- Connect the load (e.g., motor, inverter) and charger to the P- and P+ terminals of the BMS. P- is the discharge/charge negative, and P+ is the discharge/charge positive (which is typically the same as B+ in a common port BMS).
- If using, connect the soft switch, display, or communication modules (RS485/CAN) to their respective ports on the BMS.
6. Operation
Once installed, the JIKONG Smart BMS actively monitors and manages your battery pack. Its primary functions include:
- Cell Voltage Monitoring: Continuously tracks the voltage of each individual cell.
- Active Balancing: Equalizes cell voltages to maximize battery capacity and lifespan.
- Overcharge Protection: Prevents cells from being charged beyond their safe voltage limits.
- Overdischarge Protection: Prevents cells from being discharged below their safe voltage limits.
- Overcurrent Protection: Protects against excessive current during charge and discharge.
- Short Circuit Protection: Immediately cuts off current in case of a short circuit.
- Temperature Protection: Monitors battery temperature and takes action to prevent overheating or freezing.
Intelligent Interaction and Parameter Adjustment:
The JIKONG Smart BMS allows for free adjustment of multiple protection values through its dedicated mobile application or PC software. This includes parameters for overcharge, overdischarge, overcurrent, temperature, and balance settings. Before making any adjustments, it is recommended to thoroughly understand the internal parameters of the protection board.
Mobile App and PC Software:
The "JIKONG SMART BMS" Bluetooth APP provides a personal lithium battery steward on your mobile phone, displaying all kinds of information clearly. The app supports multiple languages and can be switched automatically with your mobile phone system. You can also use PC software or a JIKONG home storage display for monitoring and control.
The app and software provide detailed insights into your battery's status, including:
- Real-time voltage and current
- Individual cell voltages
- Battery temperature (NTC)
- State of Charge (SOC)
- Alarm status
- Cycle count
- Balance status
Balancing Performance:
The active balancing feature significantly reduces voltage differences between cells, as demonstrated in the example below for a 16-section 100AH series battery.
7. Maintenance
To ensure the long-term performance and reliability of your JIKONG Smart BMS, follow these maintenance guidelines:
- Keep Dry: Protect the BMS from moisture and water exposure.
- Temperature Control: Operate the BMS within its specified temperature range. Avoid extreme heat or cold.
- Inspect Connections: Periodically check all wiring connections (main power, balance wires, sensors) for tightness and corrosion. Loose connections can lead to poor performance or damage.
- Cleanliness: Keep the BMS unit clean and free from dust and debris. Use a soft, dry cloth for cleaning.
- Software Updates: Regularly check for and install any available firmware or software updates for the mobile app or PC software to ensure optimal performance and access to new features.
8. Troubleshooting
If you encounter issues with your JIKONG Smart BMS, consider the following troubleshooting steps:
- No Power/No Display:
- Check all main power connections (B-, B+, P-).
- Ensure the battery pack has sufficient voltage.
- Verify the display unit (if external) is correctly connected and powered.
- Balancing Issues:
- Check all individual balance wire connections (B1-Bx) for proper contact and sequence.
- Ensure the battery cells are not severely out of balance, which might require a longer balancing time.
- Verify balance settings in the mobile app or PC software.
- Protection Triggered (Overcharge, Overdischarge, Overcurrent, Short Circuit):
- Identify the specific protection triggered via the mobile app or display.
- For overcharge/overdischarge: Check individual cell voltages. Adjust charging/discharging parameters if necessary.
- For overcurrent: Reduce the load or check for short circuits in the load path.
- For short circuit: Immediately disconnect the load and inspect wiring for any direct shorts.
- For temperature protection: Ensure NTC sensors are correctly placed and the battery is operating within safe temperature limits.
- Bluetooth Connectivity Issues:
- Ensure Bluetooth is enabled on your mobile device.
- Make sure the BMS is powered on.
- Try restarting the mobile app and the BMS (by disconnecting and reconnecting power briefly).
- Ensure your mobile device is within range of the BMS.
If the problem persists after attempting these steps, please contact JIKONG customer support for further assistance.
9. User Tips
- Initial Setup: Double-check all balance wire connections before applying main power. A common mistake is incorrect balance wire sequencing.
- Monitoring: Regularly use the mobile app to monitor your battery's health, especially individual cell voltages and temperatures, to catch potential issues early.
- Parameter Customization: The adjustable protection parameters are powerful. Only modify them if you fully understand the implications for your specific battery chemistry and application. Refer to your battery cell manufacturer's specifications.
- Firmware: Keep an eye out for firmware updates for the BMS itself, as these can improve performance and add features.
10. Warranty & Support
For warranty information, technical support, or service inquiries regarding your JIKONG JK-BD6A20S20P Smart BMS, please contact your original point of purchase or JIKONG customer service directly. Ensure you have your product model number and any relevant purchase details available when seeking support.
JIKONG is committed to providing high-quality products and excellent customer service. For more information about JIKONG Technology, you can refer to their company profile:
Chengdu Jikong Technology Co., Ltd. has mastered four core technologies of active balance power battery management systems: active balance, wireless transmission, functional safety, and capacity management. The company has a strong development team and is certified by ISO9001.
