Aoleaby Aoleaby
JK Smart BMS B1A8S10P User Manual
Active Balance Battery Management System
1. Product Overview
The JK Smart BMS B1A8S10P is an advanced active balance battery management system designed to optimize the performance and extend the lifespan of various battery types, including Li-Ion, LiFePO4, and LTO. It features real-time monitoring, active energy transfer equalization, and comprehensive protection functions.

Image: Front view of the JK Smart BMS B1A8S10P, showing the main terminals and QR code for app download.
Applications
This BMS is suitable for a wide range of applications requiring reliable battery management, including:
- E-bikes and Electric Tricycles
- Low Speed Quads and Forklifts
- Cleaning Cars and Tourist Cars
- Industrial Drones and Scooters
- RV Energy Storage and Energy Storage Cabinets
- Power Banks and Power Tools

Image: Visual representation of various applications where the JK Smart BMS can be utilized, such as electric vehicles and energy storage systems.
2. Key Features
- Active Balance: Real-time active energy transfer equalization with supercapacitor as the medium, ensuring battery consistency and extending lifespan.
- High Balance Current: Capable of achieving 1A continuous balanced current.
- Wide Voltage Range: Single cell voltage range 1V~5V, with equalization accuracy of ±5mV.
- Comprehensive Protection: Protects against over-charge, over-discharge, over-current, short circuit, and low temperature charging cutoff.
- Mobile App Connectivity: Equipped with mobile phone Bluetooth communication and a dedicated app for real-time battery status monitoring (Android and iOS compatible).
- Scalability: Supports balanced cascading for up to 24 battery packs.
- Battery Type Compatibility: Suitable for lithium iron phosphate, ternary lithium, lithium titanate, and other battery types.

Image: Diagram highlighting key features and specifications of the B1A8S10P model, including balance current, battery strings supported, and charge/discharge current.
Security Protection
The JK Smart BMS incorporates six essential security protections to ensure the safe operation and longevity of your battery system:
- Overcharge Protection: Prevents over-charging, which can affect battery life.
- Short Circuit Protection: Automatic protection when a short circuit is detected.
- Over-discharge Protection: Prevents the battery from running out completely.
- Over-current Protection: Prevents the current from exceeding the battery's safe range.
- All-in Protection: Designed to prevent cable drop or poor contact.
- Over-temperature Protection: Prevents the battery from overheating.

Image: Visual representation of the six security protection features, showing how the BMS safeguards the battery against various hazards.
3. Package Contents
Upon opening the package, please verify that all the following components are included:
- 1 x BMS with BT built-in
- 1 x Temperature sensor (NTC 40cm)
- 1 x Balance wires (70cm)
- 1 x Active switch (50cm)
- 1 x Heating cable (Only for BMS with Heat Function)
- 1 x Operate manual

Image: A visual breakdown of the package contents, including the BMS unit, wires, switch, temperature sensor, and manual.
4. Setup and Installation
General Connection Guidelines
Connect the balance wires to the corresponding battery cells, ensuring correct polarity and sequence. The main battery positive (B+) and negative (B-) terminals should be connected to the BMS. The active switch is used to activate or deactivate the BMS. Refer to the wiring diagram provided in the included operate manual for detailed connection instructions specific to your battery configuration.
Heating Cable Installation (If applicable)
For BMS models with the heating function, follow these steps:
- The green 5PIN cable of the heating cable needs to be linked to the heating pad.
- The black and red cables are linked to the smart charger.
- After the smart charger links the BMS, it detects the temperature of the battery through the BMS, automatically monitoring the charging status of the battery.
5. Operation Guide
Mobile Application (APP) Usage
The JK Smart BMS features a dedicated mobile application for real-time monitoring and parameter adjustment. The app is available for both Android and iOS operating systems.
- Monitor Data: View real-time battery data, including voltage, current, temperature, and cell balance status.
- Modify Parameters: Adjust various BMS settings to suit your specific battery requirements.
- Control Balance Switch: Remotely control the BMS balance function.
To download the official JK Smart BMS APP, scan the QR code found on the product or visit the following link: http://qr17.cn/BApbC0

Image: A visual representation of the Smart BT APP interface, showing real-time battery data monitoring and control options.
Heating Function Operation
The heating function is designed to protect your battery in cold environments:
- If the battery temperature falls below the low-temperature charge protection threshold (settable within the app), charging will be turned off, and heating will be activated.
- The heating power depends on the battery voltage and the resistance value of the heating film.
- The system uses 1 internal and/or 2 external temperature sensors to detect battery temperature.
Parallel Use of BMS
The BMS supports parallel use for increased capacity or power. Refer to the detailed instructions in the included manual for proper configuration when connecting multiple BMS units in parallel.
6. Maintenance
To ensure the longevity and optimal performance of your JK Smart BMS and battery system, consider the following maintenance tips:
- Regularly monitor battery cell consistency through the mobile application.
- Ensure all connections are secure and free from corrosion.
- Keep the BMS unit clean and free from dust or debris.
- Avoid exposing the BMS to extreme temperatures or moisture beyond its operating specifications.
- Periodically check for firmware updates through the app to ensure you have the latest features and bug fixes.
7. Troubleshooting
If you encounter issues with your JK Smart BMS, consider the following common troubleshooting steps:
- No Power/No Indication: Check all power connections (B+, B-, P-). Ensure the active switch is in the ON position.
- App Connection Issues: Verify Bluetooth is enabled on your mobile device. Ensure the BMS is powered on and within range. Restart the app or your phone.
- Unbalanced Cells: The active balance feature should address minor imbalances. If significant imbalance persists, check balance wire connections to individual cells.
- Protection Triggered (Over-voltage, Under-voltage, Over-current): The BMS will cut off power to protect the battery. Check the app for specific fault codes or warnings. Address the root cause (e.g., reduce load, check charger).
- Heating Function Not Working: Ensure the heating cable is correctly connected to both the heating pad and the smart charger. Verify the low-temperature charge protection setting in the app.
For persistent issues, refer to the detailed troubleshooting section in the full manual or contact customer support.
8. Technical Specifications
The following table provides detailed technical specifications for the JK Smart BMS B1A8S10P and related models:
| Item | BD4A17S4P | BD4A20S4P | BD6A17S6P | BD6A20S6P | BD6A24S6P | BD6A24S8P | BD6A20S10P | BD6A24S10P | B1A8S10P | B1A17S12P |
|---|---|---|---|---|---|---|---|---|---|---|
| Li-Ion String supported | 7-20S | 7-24S | 7-20S | 7-24S | 7-24S | 7-24S | 7-20S | 7-24S | 4S-8S | 7-24S |
| LiFePO4 String supported | 8-17S | 8-20S | 8-17S | 8-20S | 8-20S | 8-20S | 8-17S | 8-20S | 4S-8S | 8-20S |
| LTO String supported | 12-17S | 12-20S | 12-17S | 12-20S | 12-20S | 12-20S | 12-17S | 12-20S | 6S-8S | 12-20S |
| Active balance current | 0.4A | 0.4A | 0.6A | 0.6A | 0.6A | 0.6A | 0.6A | 0.6A | 1A | 0.6A |
| Inner resistance of main chip | 2.8mΩ | 2.8mΩ | 1.53mΩ | 1.53mΩ | 1.2mΩ | 1.2mΩ | 1mΩ | 1mΩ | 10mΩ | 0.65mΩ |
| Continuous discharge current | 40A | 60A | 60A | 80A | 80A | 100A | 100A | 120A | 100A | 120A |
| Continuous charge current | 40A | 60A | 60A | 80A | 80A | 100A | 100A | 120A | 100A | 120A |
| Peak discharge current (2X) | 80A | 100A | 150A | 150A | 200A | 200A | 250A | 250A | 200A | 250A |
| Over current limit (ADJ) | 10-40A | 10-60A | 10-60A | 10-80A | 10-80A | 10-100A | 10-100A | 10-120A | 10-100A | 10-120A |
| Other interface (Default) | RS485 | RS485 | ||||||||
| Other interface (Customized) | CANBUS/HEAT | CANBUS/HEAT | ||||||||
| Overall dimension (L*W*H mm) | 110*73*18 | 116*83*18 | 133*81*18 | 162*102*20 | 189*94*24 | |||||
| Item | B1A20S12P | B1A20S15P | B1A24S15P | B2A20S20P | B2A24S20P | BD4A8S4P | B1A8S20P | B1A8S20P | B2A8S20P | B5A25S6P |
|---|---|---|---|---|---|---|---|---|---|---|
| Li-Ion String supported | 7-20S | 7-20S | 7-24S | 7-20S | 7-24S | 3-8S | 3-8S | 3-8S | 8-25S | 8-25S |
| LiFePO4 String supported | 8-20S | 8-20S | 8-24S | 8-20S | 8-24S | 4-8S | 4-8S | 4-8S | 8-25S | 8-25S |
| LTO String supported | 12-20S | 12-20S | 12-24S | 12-20S | 12-24S | 6-8S | 6-8S | 6-8S | 12-25S | 12-25S |
| Active balance current | 1A | 1A | 2A | 0.4A | 0.4A | 1A | 2A | 2A | 5A | 5A |
| Inner resistance of main chip | 0.65mΩ | 0.65mΩ | 0.47mΩ | 0.47mΩ | 0.47mΩ | 2.8mΩ | 0.3mΩ | 0.3mΩ | / | / |
| Continuous charge current | 120A | 150A | 200A | 40A | 100A | 20A | 100A | 1000A | 500A | 500A |
| Continuous discharge current | 120A | 150A | 200A | 40A | 100A | 20A | 100A | 1000A | 500A | 500A |
| MAX discharge current (2X) | 250A | 300A | 350A | 60A | 200A | 350A | / | / | / | / |
| Over current limit (ADJ) | 10-100A | 10-150A | 10-200A | 10-40A | 10-100A | 10-20A | 10-100A | 10-1000A | 10-500A | 10-500A |
| Other interface (Default) | RS485 | RS485 | ||||||||
| Other interface (Customized) | CANBUS/HEAT | CANBUS/HEAT | ||||||||
| Overall dimension (L*W*H mm) | 162*102*20 | 162*102*20 | 110*73*18 | 153*136*18 | 189*94*24 | |||||
| Wiring diagram | Common Port | Split Port | ||||||||
| Single cell voltage supported | 1-5V | |||||||||
| Voltage equalization accuracy | ±5mV | |||||||||
| Overcharge protection voltage | 1.2-4.35V Adjustable | |||||||||
| Overcharge release voltage | 1.2-4.35V Adjustable | |||||||||
| Overcurrent release delay time | 2-120S Adjustable | |||||||||
| Over-discharge protection voltage | 1.2-4.35V Adjustable | |||||||||
| Over-discharge release voltage | 1.2-4.35V Adjustable | |||||||||
| Temperature sensor | 3pcs | |||||||||
| Temperature protection | YES | |||||||||
| Short circuit protection | YES | |||||||||
| Coulometer | YES | |||||||||
| Bluetooth | YES | |||||||||
| LCD supported | YES | |||||||||
| RS485 supported | YES | |||||||||

Image: A comprehensive table detailing the technical specifications for various JK Smart BMS models, including string support, balance current, and protection features.
General Product Specifications
- Package Dimensions: 1.18 x 0.79 x 0.39 inches
- Item Weight: 1.76 pounds
- Manufacturer: Aoleaby
- Country of Origin: China
- Item Model Number: Aoleaby (B1A8S10P variant)
9. Warranty and Support
For warranty information and technical support, please refer to the documentation included with your purchase or contact the seller directly. Ensure you have your product model number (B1A8S10P) and purchase details ready when seeking assistance.
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