摘要
通过建立锂电池的热模型,分析了锂电池在不同倍率放电时的发热量。在液体冷却方式下对锂电池组进行了散热设计,模拟散热器在电池组1 C、3 C、5 C放电时流体温度和流量变化情况下的散热性能。仿真结果表明:采用液体冷却能有效降低电池组温度,电池之间的温度一致性好,但在大倍率放电时,单体电池内外温差比较大;而在不同工况下通过改变入口质量流量和优化设计,可以减小电池内外温度差,使电池工作在合理的温度范围内。
Through building the lithium battery thermal model, the calorific value of the lithium battery at different discharge rate was analyzed. The radiator of Lithium Battery Pack was designed with using liquid as heat transmission medium. Then the cooling performance of the changes of fluid temperature was simulated, and mass flow when the battery pack was discharged at 1 C, 3 C, 5 C rate. The simulation results show that the liquid cooling can effectively reduce the battery temperature and provide better temperature uniformity between the different batteries, but the difference between inside and outside temperatures of the single cell is large during high-rate discharge. However, the temperature difference could be deduced by the change of mass flow and optimal design,and the battery could be made to work in the reasonable range.
出处
《电源技术》
CAS
CSCD
北大核心
2015年第3期454-457,共4页
Chinese Journal of Power Sources
基金
国家自然科学基金(51176045)
湖南省新型工业化专项(2012gk4009)
