Purpose: 120a connector for charging and discharging interface of new battery box and new energy storage bag. The power change connector is an important part of the quick change battery system. It is a special connector for realizing the rapid electrical connection and separation between the whole vehicle and the quick change battery system. It is mainly composed of quick change plug, quick change socket and relevant cables. In the application of new energy vehicle power exchange mode, the power exchange connector is the only electrical interface of the battery pack, which needs to provide mixed connection of high voltage, low voltage, communication and grounding at the same time.