Journal of Guangdong University of Technology ›› 2017, Vol. 34 ›› Issue (01): 45-49.doi: 10.12052/gdutxb.160057

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A Study of Heat Generation Behavior of 18650 Cylindrical Battery

Wang Zi-yuan, Zhang Guo-qing, Gao Guan-yong, Lyu You-fu   

  1. School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2016-04-05 Online:2017-01-09 Published:2017-01-09

Abstract:

With the continuous development of new energy vehicles, increasing the thermal safety of the power battery attracts more attention. The data of current, voltage, temperature and time of the 18650 single cell are tested under the constant current 1 C discharge rate, the theoretical calorific value of the cell estimated to be 3 901.51 J based on law of conservation of energy, and the average specific heat and the average heating power is calculated through experimental method to be respectively 5.37 J/(g·K) and 1.08 W. At the same time, the surface/section temperature image of the 18650 single cell through 1 C constant current discharge is simulated by the way of computer simulation. Compared with the experimental data and verified, the error of the maximum temperature is less than or equal to 1℃, which lays a theoretical foundation for the follow-up evaluation of the electric vehicle thermal disaster.

Key words: battery heat generation, heat safety, energy conservation

CLC Number: 

  • TK112

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