HQ-BDU-A002 low voltage break module, including charge, discharge, charge heating and precharge relay control, and realize the top compatibility of low voltage and high current acquisition module; Charge and discharge and heating circuit set fuse protection; The whole machine has discharge control, charge control, charge heating control, power-on self-holding, precharge control. The internal module adopts the integrated design, and the upper and lower covers adopt the modular design concept to achieve the compatibility of different products.