The main job of BMS is to deal with tasks related to on-board batteries. Although the current battery manufacturing process has reduced the difference between the individual cells, there are still differences in internal resistance, capacity, voltage and so on between single lithium batteries, so in practical applications, each single battery inside the battery pack is prone to uneven heat dissipation or excessive charge and discharge. Over a long period of time, these batteries in poor working condition are likely to be damaged in advance, and the overall life of the battery pack will be greatly shortened. The main work of the BMS system is divided into two main tasks - the detection of the battery and the guarantee of battery safety.

                                                                       Power filter circuit

BMS is protected by means of high pressure control. The high voltage of the battery can reach 300-500V, far exceeding the safety voltage of the human body 36V, the risk is great, must do a good job of high voltage control, the most common is relay, high voltage interlock, insulation protection. Comprehensive high pressure protection control can effectively protect the personal safety of drivers, passengers and maintenance personnel.