混合动力发动机与动力电池冷却余热双向循环预热  

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

作　　者：丁鹏[1] 邹晔[1] 张美娟[1] 蒋豪 张鹏博 DING Peng;ZHOU Ye;ZHANG Meijuan;JIANG Hao;ZHNAG Pengbo(Wuxi Institute of Technology,Wuxi 214121,China)

机构地区：[1]无锡职业技术学院,中国无锡214121

出　　处：《汽车安全与节能学报》2021年第1期125-132,共8页Journal of Automotive Safety and Energy

基　　金：江苏省产学研合作项目(BY2020448);江苏省高校自然科学研究面上项目资助项目(17KJD470004)。

摘　　要：为了提高并联式混合动力汽车发动机和动力电池低温生存能力,探索发动机与电池冷却余热资源的利用新途径,提出了一种基于余热再利用的发动机和动力电池双向循环低温预热的新方法。建立发动机和动力电池余热数值模型,定量分析和研究余热系统的温升特点与温度分布状况,揭示了发动机与动力电池余热的传热规律,设计了基于相变材料的自动双向热控装置并进行了低温试验。结果表明:该方法实现了发动机与动力电池吸热冷却和发热加热的一体化应用,可将发动机冷却余热经热换器预热动力电池并使电池内部温度保持在29℃,又将动力电池冷却余热反向循环传输至发动机机体,使发动机内部冷却液温度预热至51℃,能够明显提高发动机和动力电池低温运行能力,节约了能量,验证了所提方法的优越性。A new way to utilize the waste heat resources of engine-battery cooling was explored and a twoway 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 lowtemperature 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.

关 键 词：混合动力汽车 发动机 动力电池 余热 循环预热 

分 类 号：U469.72[机械工程—车辆工程] U471.23[交通运输工程—载运工具运用工程]