动力电池包微环境湿热特性与凝露演变分析

doi:10.19562/j.chinasae.qcgc.2025.06.006

Abstract

Abstract:

Under the coupled effect of external environment and its own operating conditions， condensation may occur inside the power battery pack. The accumulation of condensation can turn into water accumulation， posing a serious threat to the safe operation of the battery pack. By conducting temperature and humidity characteristic tests on the power battery pack and utilizing CFD numerical simulation analysis methods， the evolution process of temperature and humidity characteristics inside the battery pack and the mechanism of condensation generation are studied. The inflow of coolant instantaneously increases the likelihood of condensation while high-power operation of the module can inhibit the formation of condensation. High-temperature and high-humidity environment is detrimental to the normal operation of the battery pack， which not only may lead to localized high temperatures inside the battery pack but also increase the risk of condensation. This research provides a reference for the design and optimization of environmental humidity and heat management inside power battery packs.

Key words: power battery pack, model experiment, the hygrothermal characteristics, simulation analysis, condensation

Jiqing Chen,Pu Huang,Xinping Jiang,Jihong Chen,Fengchong Lan. Analysis of Hygrothermal Characteristics and Condensation Evolution in the Micro-environment of Power Battery Packs[J].Automotive Engineering, 2025, 47(6): 1072-1085.

Figures/Tables 28

References 24

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测点		T_a	T_b	T_c	T_d
加热与冷却阶段温度误差/℃	均值	3.33	2.37	2.12	0.78
	标准差	1.13	0.88	1.05	0.58
	最大值	-5.97	3.4	3.5	-5.35
冷却阶段温度误差/℃	均值	0.24	0.46	1.12	0.57
	标准差	0.21	0.32	0.6	0.2
	最大值	1.02	-1.1	2.02	-1.08
搁置阶段温度误差/℃	均值	0.87	0.73	0.5	1.08
	标准差	0.16	0.26	0.21	0.18
	最大值	-1.09	-1.1	0.98	-1.53

测点		RH_a	RH_b	RH_c	RH_d
加热与冷却阶段湿度误差/%	均值	5.26	2.05	0.61	5.51
	标准差	3.85	0.89	0.47	1.96
	最大值	-10.45	-4.47	3.14	-8.82
冷却阶段湿度误差/%	均值	1.58	0.92	1.73	1.23
	标准差	0.53	0.72	0.98	0.66
	最大值	2.61	-2.95	-3.88	-3.27
搁置阶段湿度误差/%	均值	0.8	1.68	1.07	2.89
	标准差	0.26	1.01	1.02	1.81
	最大值	1	-3.11	3.13	4.74

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Analysis of Hygrothermal Characteristics and Condensation Evolution in the Micro-environment of Power Battery Packs

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