Experimental Research on an 8 kW Direct Cooling Unit for Power Battery Used in a Vehicle
The performance of the battery cooling unit is critical to the safe, efficient, and reliable operation of the power battery in a vehicle. Based on the process of refrigerant direct cooling, an 8-kW power battery cooling unit for use in a pure electric truck was designed and developed. The performanc...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2019-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2019.02.020 |
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| Summary: | The performance of the battery cooling unit is critical to the safe, efficient, and reliable operation of the power battery in a vehicle. Based on the process of refrigerant direct cooling, an 8-kW power battery cooling unit for use in a pure electric truck was designed and developed. The performance of this unit was tested in both a lab and the truck itself. The results showed that if the temperature of the cooling plate located at the bottom of the battery was between 5 and 10 ℃, the highest temperature in the battery core could be reduced to 35 ℃. In addition, the refrigeration capacity could reach 7.8 kW with dual compressor cooling system. The temperature difference between the inlets and outlets of 15 cooling plates was less than 5 ℃ when the distributor and capillary were combined. In a high-temperature environment, the vehicle battery cooling unit used in the truck could maintain an average battery-core temperature of less than 28 ℃. Different inlet temperatures of cooling plates could be controlled within a range of 7–10 ℃, whereas the outlet temperature could be controlled within 9–13 ℃, which is very effective for the cooling of battery. In addition, the influence of refrigerant charge and the opening degree of the H-type thermal expansion valve on the performance of the unit were analyzed, and the control strategy of the unit was formulated and evaluated. |
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| ISSN: | 0253-4339 |