Over current protection is a crucial safety barrier for electric motorcycle batteries, which is used to restrain abnormal large current generated in the process of battery discharge and charging, and prevent battery damage and safety accidents caused by current overload. In the actual driving process of electric motorcycles, instantaneous high current will be generated during rapid acceleration, climbing, and heavy-load driving. In addition, circuit aging, line short circuit, and charger failure will also cause continuous over-current impact on the battery. Excessive current will lead to rapid battery heating, internal cell damage, wire burnout, and even trigger thermal runaway and fire accidents. The over current protection system can monitor and limit the current in real time to ensure the stable operation of the battery within the safe current range.

The over current protection system of electric motorcycle batteries has dual protection functions for charging current and discharging current, with high-precision real-time monitoring and rapid response capabilities. The BMS system collects the current data of the battery loop at millisecond intervals, and sets independent safe current thresholds for charging and discharging scenarios respectively. When the instantaneous discharge current generated by vehicle acceleration and load exceeds the safe range, the system will quickly adjust the current output, limit the power release, and avoid excessive current impact on the battery cells. When the charging current is abnormal due to charger failure or voltage fluctuation, the system will immediately cut off the charging circuit to prevent the battery from being burned by over-current charging.

Different from single over-current interception, the intelligent over current protection technology also has graded response and fault recording functions. For short-term instantaneous over-current caused by normal driving acceleration, the system adopts mild current limiting protection to ensure the normal power output of the vehicle without affecting the driving experience. For continuous abnormal over-current caused by circuit faults, the system will implement thorough power-off protection and record the fault code synchronously, which is convenient for subsequent maintenance and troubleshooting. For battery rental and subscription fleets, the over current protection function greatly improves the environmental adaptability of batteries, enables batteries to adapt to complex road conditions and high-intensity operation, reduces battery failure and safety accident rates, and provides solid technical support for the safe and stable operation of large-scale electric motorcycle fleets.