Experimental study on power battery thermal managment system based on thermoelectric-coupling liquid-cooling

doi:10.3969/j.issn.1674-8484.2022.03.015

Abstract

Abstract:

A thermoelectric-coupled liquid-cooling battery thermal-management system was designed to prolong the cycle life and endurance mileage of pure electric vehicle power batteries and improve the safety of the whole vehicle. An experimental test bench was built to analyze the thermal characteristics of the battery pack in the process of discharge and preheating. The heat dissipation performances of the battery pack were studied by changing the voltage, the flow rate, the coolant temperature, and the other parameters. The experimental results show that the maximum temperature of the battery is kept below 41 ℃ when the battery is charged and discharged by 1C to 2C cycle at 35 ℃. Compared with natural convection cooling and liquid cooling, the thermoelectric cooling system reduces by 10 ℃ and 7 ℃ respectively. The maximum temperature difference between single battery and battery pack is within 5 ℃ and 8 ℃ respectively, which always keeps the battery in the appropriate temperature range.

Key words: vehicle safety, new energy vehicles, lithium batteries, cooling systems, thermal managment system, liquid cooling, thermoelectric units

CLC Number:

TM912

SHAN Chunxian, XIA Dengfu, LIU Zhaoyang, TANG Aikun. Experimental study on power battery thermal managment system based on thermoelectric-coupling liquid-cooling[J]. Journal of Automotive Safety and Energy, 2022, 13(3): 535-540.

Figures/Tables 15

References 16

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磷酸铁锂电池	标准电压	3.2 V
	充电截止电压	3.65 V
	放电截止电压	2.5 V
	标准容量	50 Ah
	最大放电电流	150 A
	最大充电电流	75 A
	内阻	≤3 mΩ
TEC- 12706	最大工作电流	6 A
	标准工作电压	12 V
	几何尺寸	30 mm×30 mm×3.5 mm
液冷板	几何尺寸	378 mm×145 mm×6 mm

磷酸铁锂电池	标准电压	3.2 V
	充电截止电压	3.65 V
	放电截止电压	2.5 V
	标准容量	50 Ah
	最大放电电流	150 A
	最大充电电流	75 A
	内阻	≤3 mΩ
TEC- 12706	最大工作电流	6 A
	标准工作电压	12 V
	几何尺寸	30 mm×30 mm×3.5 mm
液冷板	几何尺寸	378 mm×145 mm×6 mm

设备名称	量程	精度	型号	生产厂家
充放电仪器	30 V, 100 A	0.01%	CT-4001	深圳新威
温度巡检仪	-100~200 ℃	0.20%	AT4532	常州安柏
蠕动泵	0.3~6 L/min	3.00%	WT600S	保定雷弗
恒温水箱	-5~100 ℃	±0.1 ℃	DC0506	上海助蓝
恒温箱	-5~65 ℃	±0.1 ℃	SHP150	上海精宏
直流电源	10 V, 100 A	0.3%	DP3010B	迈斯泰克

设备名称	量程	精度	型号	生产厂家
充放电仪器	30 V, 100 A	0.01%	CT-4001	深圳新威
温度巡检仪	-100~200 ℃	0.20%	AT4532	常州安柏
蠕动泵	0.3~6 L/min	3.00%	WT600S	保定雷弗
恒温水箱	-5~100 ℃	±0.1 ℃	DC0506	上海助蓝
恒温箱	-5~65 ℃	±0.1 ℃	SHP150	上海精宏
直流电源	10 V, 100 A	0.3%	DP3010B	迈斯泰克