If your electric vehicle (EV) stops charging mid-way from a fast charger, it could be due to several reasons:
Battery capacity:
Fast chargers are designed to charge EV batteries at a higher rate than standard chargers. However, if your EV battery is already partially charged, the fast charger may automatically slow down or stop the charging process to prevent overcharging or overheating. This is because the battery's capacity to accept a high rate of charge decreases as it gets closer to a full charge. Therefore, even if you start charging with a fast charger, the charging speed may slow down as the battery capacity increases.
Power output:
Fast chargers require a high level of power output to operate, which may exceed the capacity of the charging station or the power grid in some cases. If the charging station or the power supply experiences a sudden surge or drop in voltage or current, the fast charger may stop charging or reduce the charging rate to avoid damage to the battery or the charging system. This can happen if you use a fast charger during peak hours, extreme weather conditions, or in an area with poor power infrastructure.
Cable or connector issues:
Fast chargers use specialized cables and connectors that are designed to handle higher currents and voltages than standard chargers. However, if the cable or connector is damaged, loose, or incompatible with your EV, it may cause a charging interruption or failure. This can happen if the cable is pulled, twisted, or exposed to extreme weather or physical stress, or if the connector pins are dirty, corroded, or bent. In some cases, the EV's software may also detect a cable or connector issue and stop the charging process for safety reasons.
EV software or hardware issues:
If your EV has outdated software, glitches, or hardware defects, it may not be able to communicate with the fast charger properly, which can cause a charging interruption or failure. This can happen if the EV's battery management system (BMS) or charging control unit (CCU) malfunctions, or if the EV's firmware is not compatible with the fast charger's software. In some cases, you may need to update your EV's software or bring it to a certified mechanic or dealer for diagnosis and repair.
In conclusion, if your EV stops charging mid-way from a fast charger, it could be due to battery capacity, power output, cable or connector issues, or EV software/hardware issues. To troubleshoot the issue, you can check the charging cable and connector, use a different fast charger or charging station, monitor the charging rate and battery level, or seek professional help if needed.