Using high-power DC charging technology, the battery of an electric vehicle is quickly replenished with energy, and the charging power and speed are usually controlled by the vehicle-side BMS system.
Supercharging (super charging) is a high-power DC charging technology designed to significantly shorten the charging time of electric vehicles. Its working principle and core features are as follows:
1. High-power DC charging
Supercharging converts the AC power of the power grid into DC power through a DC charging pile, and directly delivers it to the battery system of the electric vehicle at high voltage (usually not less than 1000 volts) and high current (at least 400 amps). This high-power input enables the battery to quickly replenish energy in a short period of time, such as increasing the power from 20% to 80% in 10 minutes.
2. Application of liquid cooling technology
In order to cope with the heat generated during high-power charging, supercharging systems usually use liquid cooling technology. The liquid cooling system removes heat by circulating a coolant (such as water, oil or fluorocarbon) to ensure stable temperature during charging. This not only improves charging efficiency, but also extends battery life and reduces noise.
3. Control of the vehicle-side BMS system
The charging speed and power of supercharging are monitored and adjusted in real time by the vehicle-side BMS system (battery management system). The BMS system dynamically adjusts the charging parameters according to the battery status (such as temperature, voltage and current) to ensure the safety and efficiency of the charging process.
4. Comparison with traditional charging technology
Slow charging: The AC power is converted to DC power through the AC charging pile and the on-board charger. The charging speed is slow and it usually takes 6 to 8 hours to fully charge.
Fast charging: The DC charging technology is used, and the charging speed is fast. 80% of the charging capacity can be completed within 1 hour.
Supercharging: As an upgraded version of fast charging, it further shortens the charging time and is suitable for scenes that require fast energy replenishment, such as highway service areas.
5. Future development trend
With the advancement of technologies such as high-voltage platforms and solid-state batteries, supercharging technology is expected to become more popular and become one of the key technologies to solve the anxiety of electric vehicle charging. Its high efficiency, safety and low noise characteristics will promote its widespread application in commercial areas and highway service areas.
Summary: Supercharging achieves rapid energy replenishment for electric vehicles through high-power DC charging and liquid cooling technology, combined with the intelligent control of the vehicle-side BMS system. It is an important direction for the future development of charging technology.