The battery of an electric vehicle stores DC power, while the power grid usually provides AC power. When AC charging, the on-board charger in the car converts AC power into DC power and stores it in the battery.

However, the power of the on-board charger is usually limited, resulting in a slow charging speed. The DC fast charging station directly converts AC power into DC power and transmits it directly to the vehicle battery at high power, bypassing the limitations of the on-board charger and achieving faster charging speed.

Is fast charging of electric vehicle charging connectors harmful to electric vehicle batteries?

Frequent use of DC fast charging may have a certain impact on electric vehicle batteries, mainly manifested in a slightly shortened battery life. This is because high-power charging will increase the battery temperature, accelerate the chemical reaction of the battery, and thus accelerate the aging of the battery.

However, modern electric vehicles are generally equipped with a battery management system (BMS) that can monitor and adjust the charging power and temperature to reduce the impact of fast charging on the battery.