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Need help?Do you have a question about the Xiaomi M365PRO and is the answer not in the manual?
Details the wiring diagram for the Xiaomi M365 model.
Details the wiring diagram for the Xiaomi M365PRO model.
Provides links to video guides for the installation process.
Explains the function and purpose of each configurable BMS parameter.
Lists the standard default values for all configurable BMS settings.
Details the wiring diagram for the Xiaomi M365 model.
Details the wiring diagram for the Xiaomi M365PRO model.
Provides links to video guides for the installation process.
Explains the function and purpose of each configurable BMS parameter.
Lists the standard default values for all configurable BMS settings.
This document describes a repair Battery Management System (BMS) designed for Xiaomi Mijia M365 and M365PRO electric scooters. This repair BMS serves as a replacement for a faulty original BMS or for upgrading the battery by replacing cells with higher capacity ones. It can also be used for custom-built 10s battery packs. The repair BMS is designed to be recognized as a standard component by Xiaomi Mijia M365/M365PRO scooters, maintaining all original functionalities. Additionally, it offers flexible configuration of various parameters such as battery capacity, discharge curve, serial number, and maximum current.
The repair BMS is a crucial component for managing the battery pack of Xiaomi electric scooters. Its primary function is to monitor and control the charging and discharging processes, ensuring the safety and longevity of the battery cells. It continuously monitors individual cell voltages, overall battery voltage, current, and temperature. In case of anomalies, it triggers protective measures to prevent damage to the battery or the scooter.
The BMS includes an "Activity and error indicator" which flashes every half second during normal operation. If an error occurs, it displays a specific error code, which can be referenced in the "Troubleshooting" section for diagnosis. Temperature sensors integrated into the BMS provide real-time temperature data, displayed in the smartphone application. If these sensors detect an excessive temperature, the BMS temporarily disables charging and discharging to protect the battery. A thermal fuse is also present, which irreversibly melts at a critical battery temperature, completely cutting off BMS power and, consequently, battery charge and discharge. Current fuses are designed to irreversibly burn out at critical overcurrents if the software protection fails to activate.
The BMS supports Li-ion and Li-pol battery types and is exclusively designed for 10s battery configurations. It manages continuous discharge and charge currents, and also facilitates cell balancing to ensure uniform voltage across all cells.
The repair BMS offers extensive customization and monitoring capabilities through a dedicated smartphone application called "M365 BMS Tool," available for both Android and iPhone. This application allows users to configure numerous parameters, which is particularly useful when replacing a faulty original BMS, upgrading to higher capacity cells, or assembling a custom battery pack.
Installation: The installation process involves connecting the BMS to the battery pack and the scooter's electrical system. Specific wiring diagrams are provided for both Xiaomi M365 and M365PRO models. It is crucial to follow the wiring sequence precisely to avoid irreparable damage to the BMS and voiding the warranty. The steps include connecting the black power wire to the negative lead, the red power wire to the positive lead, and then connecting the balancing wires in a specific order (B0 to B10 for M365, B0 to B9 for M365PRO). Temperature sensors and the thermal fuse must be installed using a thermal compound or neutral sealant. A connector for the rear light wire needs to be soldered, and finally, the battery is connected to the scooter. To initiate the BMS for the first time, the charger must be connected to the scooter, and a blinking indicator LED on the board confirms a successful start.
Configuration: The "M365 BMS Tool" application provides a comprehensive interface for configuring various battery parameters.
The repair BMS is designed with several features that aid in maintenance and troubleshooting, ensuring the continued safe operation of the battery pack.
Troubleshooting: The manual provides a dedicated troubleshooting section to address common issues:
Warranty and Technical Support: The manufacturer explicitly states that returns are not accepted, and warranty is no longer provided due to instances of incorrect installation by unqualified customers. However, the quality of the BMS is affirmed by years of installations. For technical support and questions not covered in the manual, users are directed to a special Telegram group: "Xiaomi M365/PRO/1S custom electronics by Denis Yurev." This community-based support mechanism allows users to seek assistance from experienced individuals and the developer directly.
General| Category | Electric Scooter |
|---|---|
| Max Speed | 25 km/h |
| Max Range | 45 km |
| Weight | 14.2 kg |
| Max Load | 100 kg |
| Tire Size | 8.5 inches |
| Display | LED Display |
| Motor Power | 600 W |
| Battery Capacity | 474 Wh |
| Charging Time | 8 hours |
| Braking System | Disc Brake + Regenerative Braking |
| Lights | Rear: LED |
