储能科学与技术2024，Vol.13Issue(7)：2181-2191,11.DOI:10.19799/j.cnki.2095-4239.2024.0369
兼顾高/低温环境性能的动力电池热管理系统设计
Thermal management system for power battery in high/low-temperature environments
摘要
Abstract
Thermal characteristics have an important impact on the performance of electric vehicles.Low-temperature environments greatly affect the capacity and lifespan of lithium batteries,whereas high-temperature environments can lead to thermal runaway.In order to ensure the safe and efficient operation of lithium batteries in high-and low-temperature environments,this study proposes a thermal management system that takes into account high and low temperatures.By disassembling a battery's heat storage module,which is composed of thermal insulation materials and phase change materials,heat dissipation and heat preservation can be realized in high-and low-temperature weather.Modeling and simulation were done using Star CCM+software.The research results showed that the static time of the power battery was maintained above 0℃ for up to 17 h after discharging at different rates.The holding time of the power battery at low temperature was increased by about eightfold compared with the condition without thermal management,and the holding time was increased by nearly threefold compared with the holding time when phase change materials were used alone,and the need to add an insulation layer was verified.In practical applications,it was shown that an electric vehicle could be started directly after parking,which would prevent frequent preheating.Under high-temperature conditions,removing the heat storage module and using air cooling for heat dissipation saves energy and further strengthens the system's capacity for heat dissipation.After discharging at a 1C—3C rate,the maximum temperature of the battery pack after the addition of the thermal management heat dissipation system was reduced by 34%,42%,and 48%,respectively,compared with the maximum temperature of the battery pack without heat dissipation measures,and the addition of fins had a significant effect on the cooling of the battery.The maximum temperature at the 1C—3C discharge ratio was 4.8%,5.4%,and 6.7%lower than that without fins,respectively.The higher the discharge ratio,the greater the heat dissipation effect.关键词
电动汽车/电池热管理/相变材料/热管/保温Key words
electric vehicles/battery thermal management/phase change materials/heat pipes/heat preservation分类
通用工业技术引用本文复制引用
刘松燕,王卫良,彭世亮,吕俊复..兼顾高/低温环境性能的动力电池热管理系统设计[J].储能科学与技术,2024,13(7):2181-2191,11.基金项目
华能集团总部科技项目(HNKJ22-H105),珠海市产学研合作项目(2220004003010). （HNKJ22-H105）
