Over discharge protection is a key safety and performance protection technology for electric motorcycle batteries, which effectively prevents battery damage and safety risks caused by excessive power depletion. In daily travel and commercial operation, many users often continue to drive after the battery is low, resulting in extreme battery discharge. Long-term over-discharge will cause irreversible damage to the lithium battery cells, lead to capacity attenuation, internal resistance increase, and battery bulging failure, and even affect the internal circuit structure, inducing short circuit and spontaneous combustion hazards. The over discharge protection system can intelligently monitor the battery power state, avoid excessive discharge, and maximize the protection of battery performance and service life.

The working principle of over discharge protection is based on the real-time data monitoring of the BMS intelligent management system. The system sets a scientific low-voltage threshold according to the battery capacity and voltage parameters. When the battery power is consumed to the warning threshold, the system will first push low-power reminder information to the user through the instrument panel and mobile app to remind the user to charge in time. If the user continues to use the vehicle and the battery voltage drops to the over-discharge protection threshold, the system will automatically cut off the discharge loop, stop the battery from continuing to output power, and enter the low-power sleep protection state. This mechanism can effectively prevent the battery cell voltage from being too low, avoid irreversible chemical damage inside the battery, and lock the remaining power to protect the battery core structure.

The over discharge protection function is particularly important for high-frequency commercial users such as takeaway and logistics riders. These users often work long hours and have high battery consumption, and are prone to over-discharge due to forgetting to charge or continuous overtime work. The intelligent over discharge protection system can effectively reduce the battery loss rate of commercial fleets and reduce the frequency of battery replacement and maintenance. After the battery enters the over-discharge sleep state, it can be automatically awakened after normal charging, without affecting subsequent normal use. For the battery rental and subscription industry, the popularization of over discharge protection technology greatly reduces the damage rate of circulating batteries, reduces the operation and maintenance cost of enterprises, and ensures the stability and safety of battery long-term cycle use, realizing a win-win situation for users and service providers.