In order to ensure the safe development of New Energy Vehicle(NEV), an in-depth study is conducted on the power batteries to effectively identify the main causes of battery failure and put forward targeted suggestions. Firstly, the main categories of power battery failure are analyzed and a power battery fault tree is established based on the fault tree by combining 16 existing domestic standards. Secondly, based on the hierarchical analysis method, a power battery fault hierarchy analysis model is constructed and the weights of each index are determined by the expert survey method. Finally, the optimization suggestions for the power battery are made according to the calculation results. The article intends to provide theoretical basis and guidance suggestions for the development of power battery reliability design of new energy vehicles.

New Energy Vehicles (NEV)  /  Power Battery  /  FTA  /  AHP  /  Reliability