%0 Journal Article
%T 8 kW车载动力电池直冷系统实验研究<br>Experimental Research on an 8 kW Direct Cooling Unit for Power Battery Used in a Vehicle
%J 制冷学报
%D 2019
%X 电池冷却机组性能的优异对于动力电池在整车上安全、高效、可靠运行至关重要。基于制冷剂直接冷却的方式，本文设计并研制了一套8 kW动力电池冷却机组，并在某纯电动重卡上进行了实验验证及装车验证。结果表明：当电池底部的冷板表面温度在5~10 ℃时，电池芯体的最高温度能够降到35 ℃以下；采用双压缩机联合制冷方式，机组制冷性能达7.8 kW；采用分液头加毛细管的分液方式能够保证15块电池冷板进出口温差维持在5 ℃以内；通过循环充放电实验，在0.8C倍率充电、1C倍率放电的条件下，电芯温度皆可在40 ℃以下；在外界高温环境下，该机组能够在20 min内将电池芯体的平均温度降至28 ℃左右；此外，分析了制冷剂充注量、H型热力膨胀阀开度等因素对机组性能的影响，制定了机组的控制策略并加以评估。<br>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
%K 电池冷却 直冷系统 冷板 控制策略 实验研究<br>battery cooling direct cooling system cooling plate control strategy experimental research
%U http://www.zhilengxuebao.com/zlxb/ch/reader/view_abstract.aspx?file_no=20190203&flag=1