Bi-directional circulating preheating method based on waste heat reuse of engine and battery for hybrid electric vehicle

doi:10.3969/j.issn.1674-8484.2021.01.013

Abstract

Abstract:

A new way to utilize the waste heat resources of engine-battery cooling was explored and a two-way cycle preheating method of waste heat reuse was conceived to improve the low-temperature survivability of engine and power battery of parallel hybrid electric vehicle and to put forward a new method of low-temperature preheating of engine and power battery. The numerical model of engine and power battery waste heat was established, the rising characteristics and distribution of the temperature in the waste heat system were quantitatively analyzed and studied, revealing the heat transfer law of engine-power battery waste heat. An automatic bidirectional thermal control device based on phase change material was designed and the low temperature test was carried out. The results show that the proposed method realizes the integrated application of engine-power battery endothermic cooling and heating, the power battery can be preheated through the heat exchanger, keeping the internal temperature of the battery at 29 ℃, and can transfer the cooling waste heat of the power battery to the engine block in reverse circulation, so as to preheat the internal coolant temperature of the engine to 51 ℃. It can significantly improve the low temperature operation ability of the engine and the power battery with saving energy, verifying the advantages of the proposed method.

Key words: hybrid electric vehicle, engine, power battery, waste heat, preheat

CLC Number:

DING Peng, ZHOU Ye, ZHANG Meijuan, JIANG Hao, ZHNAG Pengbo. Bi-directional circulating preheating method based on waste heat reuse of engine and battery for hybrid electric vehicle[J]. Journal of Automotive Safety and Energy, 2021, 12(1): 125-132.

Figures/Tables 9

References 30

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项目	规格	项目	规格
发动机排量	1.4 L	电池容量	32 Ah
发动机最大功率	110 kW	电池电压	288 V
发动机冷却液流率	80 L / min	电池冷却液流速	12 L / min
换热器材料密度	910 kg / m³	换热器导热系数	0.29 W / m.K

项目	规格	项目	规格
发动机排量	1.4 L	电池容量	32 Ah
发动机最大功率	110 kW	电池电压	288 V
发动机冷却液流率	80 L / min	电池冷却液流速	12 L / min
换热器材料密度	910 kg / m³	换热器导热系数	0.29 W / m.K

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