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CPCM/液冷复合电池散热系统均匀性研究
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Abstract:
为了缓解CPCM散热系统复合液冷模块后导致温度均匀性变差的问题，构建一种CPCM/液冷复合的电池散热系统仿真模型，将CPCM模块划分为蓄热区和导热区，填充不同EG分数的CPCM，同时研究了分区处理对CPCM潜热回收的效率及均匀性影响。仿真结果表明，引入液冷模块后，能够很好的控制电池最高温度，但电池温差明显增大，主要表现在单体电池径向温差较大；通过增大CPCM模块划分距离d调整分区位置可以在保证电池散热要求的同时改善温度均匀性，但划分距离的增大不利于潜热回收的效率和均匀性；通过提高导热区CPCM的EG填充分数，可以提高潜热回收的效率和均匀性，但同时牺牲了大量的相变潜热。
In order to alleviate the problem of poor temperature uniformity caused by the combination of liq-uid cooling and CPCM heat dissipation system, a CPCM/liquid cooling composite battery heat dissi-pation system simulation model is constructed. The CPCM module is divided into heat storage zone and heat conduction zone, and filled with CPCM with different EG fractions. At the same time, the ef-fect of zoning treatment on the efficiency and uniformity of CPCM latent heat recovery is studied. The simulation results show that the maximum temperature of the battery can be well controlled after the introduction of the liquid cooling module, but the temperature difference of the battery is significantly increased, mainly in the large radial temperature difference of the single cell; Adjust-ing the partition position by increasing the partition distance d of the CPCM module can improve the temperature uniformity while ensuring the heat dissipation requirements of the battery, but the increase of the partition distance is not conducive to the efficiency and uniformity of the latent heat recovery; The efficiency and uniformity of latent heat recovery can be improved by increasing the EG filling fraction of CPCM in the heat conduction zone, but a large amount of latent heat of phase change is sacrificed at the same time.
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