The core structure of a DC fast charging pile includes four major units: power module, control system, charging interface, and safety protection. The power module uses IGBT or SiC semiconductor devices to convert grid AC power into high-voltage DC power, supporting a maximum output power of 480kW. The intelligent control system interacts with the vehicle BMS in real time through the CAN bus communication protocol, dynamically adjusts the charging parameters, and ensures that 80% of the power supply is completed within 10-30 minutes. The charging gun head is equipped with a temperature sensor and an electronic lock, combined with multiple safety mechanisms such as leakage protection and overvoltage protection, to ensure the safety of the entire operation process.
Its working principle is based on the intelligent charging strategy of "vehicle pile collaboration". After the charging gun is connected, the pile end first communicates with the vehicle BMS through a "handshake" to confirm the battery status and charging requirements. Subsequently, the power module automatically adjusts the output voltage (200-1000V) and current (up to 1200A) based on the battery SOC status, using a charging curve of "constant current first and then constant voltage" to ensure charging efficiency and extend battery life. The unique liquid cooling technology of CAMC can control the temperature rise of the power module within 45 ℃, ensuring stability during long-term high load operation.
In terms of application scenarios, CAMC DC fast charging piles have been widely used in highway service areas, urban public charging stations, and commercial complexes. Provide various configuration solutions such as single gun, dual gun, and group charging for different operational needs. The specially developed "photovoltaic storage and charging" integrated system can combine photovoltaic power generation and energy storage batteries to achieve off grid power supply in weak areas of the power grid. With the popularity of 800V high-voltage platform models, the new generation of supercharging stations is shortening the charging time to 5-10 minutes, allowing electric travel to truly achieve a "refueling" and convenient experience.
