1. Introduction
This manual provides essential instructions for the safe and efficient operation of your RYRMCVPVCT JK-B1A8S20P Smart Battery Management System (BMS). This device is designed for LiFePO4, Li-Ion, and LTO battery packs, offering active balancing, protection features, and smart monitoring via a 3.2-inch LCD display and a dedicated mobile application.
2. Safety Information
- Always ensure proper wiring connections according to the provided diagrams. Incorrect wiring can damage the BMS or battery pack.
- Work in a well-ventilated area.
- Wear appropriate personal protective equipment (PPE), including safety glasses and insulated gloves.
- Do not short-circuit the battery terminals.
- Keep the BMS away from water, moisture, and flammable materials.
- Ensure the battery pack voltage and cell count are compatible with the BMS specifications.
- In case of smoke, unusual odors, or excessive heat, immediately disconnect the battery pack and seek professional assistance.
3. Product Overview
The JK-B1A8S20P is a smart active balancer BMS designed to manage and protect your battery pack. It features a 3.2-inch LCD display for real-time monitoring and Bluetooth connectivity for advanced settings via a mobile application.
3.1. Components
Figure 1: JK-B1A8S20P BMS unit (left) and its accompanying 3.2-inch LCD display (right).
The BMS unit (left) is the main control board, while the 3.2-inch LCD display (right) provides a visual interface for monitoring battery parameters.
Figure 2: Exploded view illustrating the internal components of the BMS, including the cooling aluminum alloy casing, MOS transistors, JIKONG MCU, NTC temperature sensor, and sampling line connections.
The internal design features cooling aluminum alloy for heat dissipation, MOS transistors for power switching, a JIKONG MCU for intelligent control, an NTC thermistor for temperature sensing, and a sampling line for cell voltage monitoring.
3.2. Packing List
Figure 3: Contents of the product package, including the BMS unit, sampling line, NTC temperature sensor, and switch key.
The package typically includes:
- BMS unit x 1
- Sampling line x 1 (long 70cm)
- NTC temperature sensor x 1 (long 40cm)
- Switch key x 1 (long 50cm)
- 3.2-inch Display x 1
4. Setup and Installation
Careful installation is crucial for the proper functioning and safety of your battery system. Follow these steps for setup:
- Prepare the Battery Pack: Ensure all individual cells in your battery pack are at a similar voltage level before connecting the BMS.
- Connect Sampling Lines: Connect the sampling lines from the BMS to each cell of your battery pack in the correct order (B- to B1, B1 to B2, etc., up to B8 for an 8S system). Refer to the wiring diagram provided with your BMS for precise connections.
- Connect NTC Sensor: Attach the NTC temperature sensor to a central cell or a location that accurately reflects the battery pack's temperature.
- Connect Main Power Cables: Connect the main negative (B-) and positive (P-) terminals of the BMS to your battery pack and load/charger, respectively. Ensure correct polarity.
- Connect Switch Key: Plug in the switch key cable to the designated port on the BMS. This switch controls the power to the BMS.
- Connect LCD Display: Connect the 3.2-inch LCD display to the BMS via its dedicated cable.
- Power On: Once all connections are secure, turn on the BMS using the switch key. The LCD display should illuminate and show battery parameters.
- Mobile App Setup: Download the official JK BMS mobile application. You can scan the QR code on the BMS unit or visit http://qr17.cn/BApbC0 to download the app. Pair your BMS via Bluetooth to access advanced settings and real-time monitoring.
5. Operating Instructions
5.1. Active Balancing Function
The JK-B1A8S20P features an active balancing system. Active balancing transfers energy from cells with higher voltage to those with lower voltage, minimizing energy loss and extending battery life. This process operates continuously during charging, discharging, or idle states until cell voltages are within a set range. The 1A active balance current ensures efficient balancing for larger capacity battery packs.
5.2. LCD Display Monitoring
The 3.2-inch LCD display provides real-time information on your battery pack, including:
- Total battery voltage
- Individual cell voltages
- Current (charge/discharge)
- State of Charge (SOC) percentage
- Temperature
- BMS status and error codes
5.3. Mobile Application (APP)
The dedicated JK BMS mobile application (available for Android) allows for comprehensive monitoring and configuration:
- Real-time Data: View detailed battery parameters, including individual cell voltages, temperatures, current, and historical data.
- Parameter Settings: Adjust various BMS protection parameters such as overcharge voltage, over-discharge voltage, overcurrent limits, and temperature thresholds.
- Firmware Updates: Perform firmware updates for the BMS (if available).
- Bluetooth Communication: Connect to the BMS wirelessly via Bluetooth for convenient access.
6. Maintenance
- Regular Monitoring: Periodically check the battery parameters via the LCD display or mobile app to ensure normal operation.
- Connection Checks: Ensure all wiring connections remain secure and free from corrosion.
- Cleanliness: Keep the BMS unit and display clean and free from dust and debris. Use a dry, soft cloth for cleaning.
- Temperature Management: Ensure the battery pack and BMS operate within their specified temperature ranges to prevent damage and prolong lifespan.
7. Troubleshooting
This section addresses common issues you might encounter with your BMS.
| Problem | Possible Cause | Solution |
|---|---|---|
| BMS not powering on / LCD blank | Loose connections, switch key off, battery voltage too low. | Check all wiring, ensure switch key is on, verify battery voltage. |
| Overcharge Protection triggered | Charging voltage too high, individual cell overvoltage. | Reduce charging voltage, check cell balance, adjust overcharge protection settings in the app. |
| Over-discharge Protection triggered | Battery discharged too low, individual cell undervoltage. | Charge the battery, check cell balance, adjust over-discharge protection settings in the app. |
| Overcurrent Protection triggered | Excessive load current. | Reduce load, check for short circuits, adjust overcurrent protection settings in the app. |
| Bluetooth connection issues | BMS not powered, app not installed, Bluetooth disabled on phone, interference. | Ensure BMS is on, reinstall app, enable Bluetooth, try connecting in close proximity. |
8. Specifications
The following table details the technical specifications for the RYRMCVPVCT JK-B1A8S20P BMS.
Figure 4: Detailed product parameters for various JIKONG BMS models. Refer to the 'JK-B1A8S20P' column for this specific model.
| Technical Index | Specification (JK-B1A8S20P) |
|---|---|
| Number of Battery Strings (Li-ion) | 3S-8S |
| Number of Battery Strings (LiFePO4) | 4S-8S |
| Number of Battery Strings (LTO) | 6S-8S |
| Balance Method | Active Balance (Full State On) |
| Balance Current | 1A |
| Conductive Resistance in Main Circuit | 0.3mΩ |
| Continuous Discharge Current | 200A |
| Continuous Charge Current | 100A |
| Maximum Discharge Current (MAX 2min) | 300A |
| Over Charge Protection Current (ADJ) | 10-200A |
| Other Interfaces (Customized) | RS485 |
| Other Interfaces (Customized) | CANBUS HEAT |
| Size/mm | 153*126*18mm |
| Wiring Output | Common Port |
| Single Cell Voltage Range | 1-5V |
| Voltage Acquisition 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 | 1Pcs |
| Temp Protection | Yes |
| Short Circuit Protection | Yes |
| Coulomb Counter | Yes |
| Bluetooth Function | Support for Android iOS |
9. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Refer to your purchase documentation for specific warranty terms and contact details.
Manufacturer: RYRMCVPVCT
Model: JK-B1A8S20P