摘要
随着电动汽车行业的蓬勃发展,动力电池组热安全问题越来越突出,需要有高温散热和低温加热的有效措施。与高温散热相比,电池组低温加热关注较少。根据传热学原理,建立了电热丝的换热模型,利用该模型设计并加工了一个加热箱。加热箱通过并联电热丝通电后加热空气:在箱子进口为恒定20℃空气,加热不足8 min,出口温度可达到90℃。再用加热箱出口的高温空气加热低温电池组:加热箱与电池箱串联后,置于-15℃环境中,加热约21 min,电池组表面温度达到0℃。证明了利用电热丝加热的高温空气为低温电池组加热是一种有效的方法。
With the booming development of the modern vehicle industry,the safety problems caused by heat generation of batteries become more severe,thus an effective cooling and heating device is necessary.Compared with most studies on thermal dissipation for batteries in high temperature,there are little studies on heating batteries in low temperature.According to thermal principles,a heat transfer model of hot wires was established.With this model,an electric air-heated box made of 11 electric heating wires in parallel was designed and produced.The Air with constant 20 ℃ was input into the box.Less than 8 minutes later,the output air temperature could be raised to 90 ℃.And then the high temperature air was used to heat the low temperature batteries.The box and the battery pack in series were put in the thermostat at-15 ℃.About 21 minutes later,the battery-surface temperature could be raised to 0 ℃.Therefore it is effective that the high temperature air heated by hot wires was used to heat the low temperature batteries.
出处
《电源技术》
CAS
CSCD
北大核心
2013年第7期1184-1187,共4页
Chinese Journal of Power Sources
基金
国家高技术研究发展计划("863"计划)项目(2011-AA11A235)
关键词
动力电池组
电动车
电热丝
加热
空气
battery pack
electric vehicle
heating wire
heating
air
