This product is used inside the battery pack of new energy electric vehicles to control the on-off of each circuit and the collection of circuit electrical signals, including the drive motor circuit, the charging and discharging circuit, the power circuit for low-power electrical appliances, and so on. The internal main circuit of the product adopts a T2 copper bar structure, and the size of the copper bar is set according to the customer's current-carrying requirements; the product protection level meets the IPXXB level, which can meet almost all vehicle operating conditions.