Charging pile, power supply, battery pack chassis, power control, maximum current up to 20a, lithium battery connector, battery pack connector, acquisition board and control board in BMS, need higher power transmission, up to 20A or higher. This product provides two pin positions with a diameter of 4.0, and is crown spring structure, with stable transmission, At the same time, there are 4 to 6 signal channels that can provide signal control, temperature control and risk disconnection signal channels for the battery. Lithium battery waterproof connector power signal 3 + 4-core round plug combination plug electric motorcycle waterproof connector calf electric vehicle charging plug socket female charging interface