This product is a comprehensive product, including the high voltage box, DC converter and car charger, the main functions are as follows: high pressure tank assembly (hereinafter referred to as PDU) is mainly used for placing relays, fuses, pre charge resistance of electrical parts, including fast charging relay, high pressure, high voltage pre charge relay accessories accessories relay, precharge resistor, PTC relay, PTC DCDC insurance, insurance, insurance, insurance, compressor slow charge, fast charge insurance, copper and so on.