EV Charging Stations

This block diagram presents the complete hardware architecture of a new energy EV charger, adopting a dual-MCU layered control framework. The upper billing & HMI layer is based on GD32F527/GD32H757, connected with LCD TFT, high-speed USB, SD card, SDRAM and Nor Flash. It communicates with 2G/4G, Wi-Fi/BLE modules and CAN transceivers via UART and CAN buses. The lower charging control layer uses GD32F527/GD32F427, linking sensors, charging gun and protection circuits through CAN, I2C and SPI interfaces. The system is powered by 380V AC input with multiple G553 AC/DC digital power modules. All functional layers exchange data through multi-node CAN buses to realize coordinated operation of HMI, charging control and power conversion units.