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Heat was produced during the charge or discharge process. The performances and circle life will be seriously affected if the heat can not be dissipated immediately. Base on the models and theories of the batteries, analytical solution has been obtained conditioned on certain assumptions with the method of thermal-electrochemical model. According to the optimized chemical model, temperature distribution has been gained in the way of this model. Compared with the experimental results, the numerical results agree well in this paper. And it will give the strong evidence of the thermal performance and the dissipation measures.