对模块的一种失效模式提出了理论分析,并在分析的基础上对3块不同S O C状态的电池进行串联操作,并根据实际使用的状况对3串模块进行大电流放电测试,以此来模拟出实际的失效状态,并对失效电池进行分析,将解剖后的电池正负极以及隔膜进行分析,根据分析的结果对电池的分选配组以及电池管理系统提出相应的建议,希望以此来延长电池的使用寿命。
The battery test methods are the key issues to investigate the energy-storage characteristics and dynamic characteristics of electric vehicle(EV) batteries.In this paper,the research advances of existing battery test methods as well as driving cycles are reviewed.An electric vehicle model that consists of EV dynamics model,battery model and electric motor model is built.The dynamic characteristics of the battery in frequency domain are analyzed.Based on the EV model and the frequency domain characteristics of the battery,a driving cycle test procedure of EV battery is proposed.The battery test procedure is able to reflect the real-world characteristics of EV batteries,and can be used as a universal EV battery test method.
