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Automotive Engineering ›› 2023, Vol. 45 ›› Issue (11): 2047-2057.doi: 10.19562/j.chinasae.qcgc.2023.11.006

Special Issue: 新能源汽车技术-电驱动&能量管理2023年

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Multi-objective Optimization of Lithium Battery Composite Cooling Structure Based on Heat Pipes and Liquid Cooling Plate

Zhiyong Duan1,Jing Ma2()   

  1. 1.School of Energy and Electrical Engineering,Chang’an University,Xi’an  710018
    2.School of Automobile,Chang’an University,Xi’an  710018
  • Received:2023-07-06 Revised:2023-08-29 Online:2023-11-25 Published:2023-11-27
  • Contact: Jing Ma E-mail:jingma@chd.edu.cn

Abstract:

To meet the temperature consistency requirements of lithium batteries after packaging, this paper proposes a composite cooling structure based on heat pipe (HP) and liquid cooling plate (CP). Using numerical simulation to compare the cooling performance of two different channels (Channel I and Channel II) in the CPs, the results show that Channel II has better cooling performance. Then, four structural factors that exert substantial influence on the cooling performance of Channel II are selected as design variables by the orthogonal experiment method, and the battery module temperature difference and coolant pressure drop are set as the objective functions. The Kriging surrogate model between the design variables and the objective functions is established, and the NSGA-II genetic algorithm is used for the optimization. Compared to the initial structure, the optimized Channel II results in a 10.52% reduction and a 50.14% reduction in temperature difference and coolant pressure drop, respectively, with only a 0.68% increase in maximum temperature. The methods and conclusions of this paper can provide a reference for the design and optimization of lithium battery cooling structure based on HP-CP.

Key words: lithium battery, heat pipe, liquid cooling plate, orthogonal design, multi-objective optimization