锂离子电池电阻预评估方法研究

Pre-evaluation method for internal impedance of lithium-ion battery

通过四探针法原理对电极极片电阻进行了测试评价,并通过测试组装电池的交流阻抗,建立起极片电阻与电池电阻的对应关系,从而实现对电池电阻的预评估。该方法为锂离子电池配方设计和提升电池性能提供了依据。

The electrodes resistance was measured by four-probe method, the corresponding relationship between the electrode resistance and the internal resistance of the battery was established by testing the ac impedance of the assembled battery. Then the pre-evaluation of the internal resistance of the battery was achieved. A basis for the formulation design of lithium ion battery and the improvement of battery performance were provided by this method.