Energy Storage Science and Technology ›› 2020, Vol. 9 ›› Issue (3): 993-1000.doi: 10.19799/j.cnki.2095-4239.2019.0212

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Test and analysis of internal temperature and heat generation characteristics of 811 type power battery

HU Feng, WANG Haimin(), CHEN Si   

  1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2019-09-23 Revised:2019-11-04 Online:2020-05-05 Published:2019-11-28
  • Contact: Haimin WANG E-mail:hmwang@usst.edu.cn

Abstract:

The 811 type ternary power battery cell with 21700 shape structure is taken as the research object. After low temperature cooling treatment, it is partially dismantled at the bottom of the single anode, and a thermocouple is arranged in the center of the battery to be arranged on the outer surface of the battery. The film type heat flow sensor quantifies the discharge heat generation rate of the battery at different ambient temperatures by using parameters such as heat flux density and internal temperature. The results show that when the battery is discharged in a low temperature environment, the battery will generate more heat and reduce the power output efficiency of the battery. It is known from the calculation result of the distribution ratio of the total heat generation rate of the battery discharge that a major portion of the heat generation when the battery is discharged is stored inside the battery.

Key words: power battery, heat flow test, temperature field, heat generation rate, built-in thermocouple

CLC Number: