Design and performance study of integrated thermal management system for electric vehicles based on energy storage box

doi:10.3969/j.issn.1674-8484.2026.02.010

Abstract

Abstract:

An integrated thermal management system based on an energy storage tank incorporating highly integrated circuit was developed to meet the temperature control needs of the passenger compartment and the battery in high and low temperature environments and to reduce the energy consumption of the thermal management system. The influence of the energy storage tank on the thermal management system's performance was investigated across various operating conditions. The results show that the energy storage tank can reduce system energy consumption by storing energy. At -20 °C and 40 °C, and the initial temperature of the energy storage tank is set to 17.6 °C and 22.2 °C, respectively, the system's energy consumption is reduced by approximately 34.44% and 28.27%; Compared to a distributed thermal management system, the integrated system reduces hundred kilometer power consumption by 3.56% during winter, improves the coefficient of performance (COP) by 18.55%, and effectively mitigates temperature fluctuations under step conditions. Consequently, the integrated design of energy storage tank is an important means of improving the energy efficiency and temperature stability of vehicle thermal management systems.

Key words: electric vehicle, energy storage tank, integrated thermal management

CLC Number:

U469.72

WU Xiangcheng, GUO Junxuan, CHEN Huayu, SU Liangbin, LU Jin. Design and performance study of integrated thermal management system for electric vehicles based on energy storage box[J]. Journal of Automotive Safety and Energy, 2026, 17(2): 244-252.

Figures/Tables 15

References 24

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工况	K_p	K_i	K_d
夏季	180~220	0.9~1.1	12~18
冬季	72~88	4.5~5.5	8~12

工况	K_p	K_i	K_d
夏季	180~220	0.9~1.1	12~18
冬季	72~88	4.5~5.5	8~12

整车	质量/ kg	1 260
	迎风面积/ m²	2.4
	滚动阻力系数	0.01
	空气阻力系数	0.3
驱动电机	峰值功率/ kW	82.8
	峰值扭矩/ N·m	250
	峰值转速/ (r·min^-1)	6 000
动力电池	类型	磷酸铁锂电池
	串并联	96/1
	容量/ Ah	50
	电压/ V	350
储能箱	保温材料	保温泡棉
	冷却液	乙二醇
	传热系数/ (W·m^-2·K^-1)	0.6

整车	质量/ kg	1 260
	迎风面积/ m²	2.4
	滚动阻力系数	0.01
	空气阻力系数	0.3
驱动电机	峰值功率/ kW	82.8
	峰值扭矩/ N·m	250
	峰值转速/ (r·min^-1)	6 000
动力电池	类型	磷酸铁锂电池
	串并联	96/1
	容量/ Ah	50
	电压/ V	350
储能箱	保温材料	保温泡棉
	冷却液	乙二醇
	传热系数/ (W·m^-2·K^-1)	0.6

θ_amb / ℃	θ_init / ℃	t_targ / s	E_cons / (kWh)
40	22.2	169	0.307
40	34.1	244	0.342
40	40.0	297	0.428
-20	17.6	292	0.651
-20	-0.8	479	0.781
-20	-20.0	627	0.993