1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your new BMS (Battery Management System) Circuit Board Controller for Xiaomi M365 and M365 Pro Electric Scooters. This product is designed to manage and protect your scooter's battery, ensuring safe and efficient performance.
2. Important Safety Warnings
⚠️ Potential Fire Risk: Please strictly follow this instruction manual for charging and storage to prevent potential fire risks. Improper handling can lead to serious injury or damage.
Always ensure that all connections are secure and correctly installed before operating the scooter. If you are unsure about any step, consult a qualified technician.
3. Product Overview
The BMS Circuit Board Controller is a critical component for your electric scooter's battery health and safety. It provides multiple layers of protection and ensures proper battery function.
3.1 Components Included
- 1 x Battery Motherboard (BMS Circuit Board)
- 2 x Flexible Edge Strips (for battery cell connections)
- 1 x Interface Board (B-10S-FPC)
- Associated wiring harnesses
Figure 1: Complete set of BMS Circuit Board Controller, two edge strips, and an interface board.
3.2 Key Features
- Short Circuit Protection: Prevents damage from accidental short circuits.
- Over-Discharge Protection: Protects the battery from being drained too low, extending its lifespan.
- Overheat Protection: Monitors battery temperature to prevent overheating.
- Overcharge Protection: Safeguards against overcharging, which can damage the battery.
- Overload Protection: Manages current draw to prevent excessive load on the battery.
- Controlled by original chip for stable and reliable performance.
Figure 2: Scooter Battery Motherboard highlighting its comprehensive protection features.
4. Specifications
| Attribute | Value |
|---|---|
| Voltage | 36V |
| Type | BMS Circuit Board Controller Dashboard / M365 Battery Motherboard |
| Compatibility | Xiaomi M365, Xiaomi M365 Pro |
| Origin | Mainland China |
| Package Length | 22 cm |
| Package Width | 11 cm |
| Package Height | 1 cm |
| Package Weight | 0.15 kg |
Figure 3: Product dimensions for the BMS circuit board, edge strips, and interface board.
5. Setup and Installation
Replacing the BMS circuit board requires careful attention to detail. It is recommended that this procedure be performed by individuals with experience in electronics repair or electric scooter maintenance.
5.1 General Installation Guidance
- Power Off: Ensure the electric scooter is completely powered off and disconnected from any charging source.
- Access Battery Compartment: Carefully open the scooter's battery compartment. This usually involves removing screws from the deck or base.
- Disconnect Old BMS: Identify the existing BMS circuit board. Disconnect all wiring harnesses and battery cell connections from the old board. Take photos of the original wiring for reference if needed.
- Remove Old Components: Remove the old BMS board, edge strips, and interface board.
- Install New Components: Install the new BMS circuit board, flexible edge strips, and interface board in their respective positions.
- Connect Wiring: Reconnect all wiring harnesses and battery cell connections to the new BMS board. Ensure that all connections are firm and correctly oriented.
- Secure Components: Secure the new components within the battery compartment.
- Close Compartment: Carefully close and secure the battery compartment.
5.2 Important Note on Charging Problems
If you are experiencing a charging problem, it is crucial to replace the entire set (Battery Motherboard, Edge strips, and Interface board). Replacing only one component may not resolve the issue, especially if the charging protection mechanism differs from the previous version.
Video 1: Demonstration of the BMS Circuit Board components and its short circuit protection feature.
6. Operating Instructions
The BMS Circuit Board Controller operates automatically once correctly installed. Its primary function is to continuously monitor and protect the battery during charging, discharging, and storage. There are no user-adjustable settings on the board itself.
- The board will automatically engage short circuit, over-discharge, overheat, overcharge, and overload protections as needed.
- Ensure your scooter's display and charging indicators function correctly after installation to confirm proper operation.
7. Maintenance
The BMS circuit board itself requires minimal maintenance. However, regular checks of the battery and its connections are recommended.
- Visual Inspection: Periodically inspect the BMS board and all connected wires for any signs of damage, corrosion, or loose connections.
- Cleanliness: Keep the battery compartment clean and free from dust, dirt, and moisture.
- Battery Health: Monitor your scooter's battery performance. A properly functioning BMS will help maintain battery health, but the battery itself has a finite lifespan.
8. Troubleshooting
8.1 Common Issues and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Scooter not charging after BMS replacement | Incompatible charging protection with previous version; only partial replacement of components. | Ensure the entire set (Battery Motherboard, Edge strips, and Interface board) is replaced. If the new components have different charging protection logic than the old ones, a partial replacement will not work. |
| Scooter not powering on | Loose connections; faulty BMS board; battery issue. | Check all wiring connections. Verify the battery is charged. If issues persist, the BMS board or battery may be faulty. |
| Error codes on scooter display | BMS fault; communication error. | Refer to your scooter's main user manual for specific error code meanings. Recheck BMS connections. |
9. User Tips
- The BMS functions to control the battery motherboard and provides the necessary interface edge for connections.
- Using this BMS ensures efficient control of the battery motherboard and proper functioning of your electric scooter.
- This BMS is specifically designed for compatibility with Xiaomi M365 and M365 Pro models.
10. Warranty and Support
For warranty information and technical support, please refer to the seller's policies or contact the point of purchase. Keep your proof of purchase for any warranty claims.
