CAJ | 학술논문

为解决电池模块内部单体电池间的温度不均匀性而影响电池的使用性能和寿命的问题，本文中采用了一种往复流冷却方式，使冷却空气流动方向周期性逆转，以降低单向流空气冷却方式时单体电池沿空气流方向的温度梯度。结果表明，采用往复流冷却方式后，在1C和13.33C放电倍率下，电池温度均匀性分别提高了12.1%和62.4%，电池模块的使用性能和安全性得到改善，电池使用寿命得以提高。同时，文中还利用计算流体动力学虚拟试验与正交优化相结合，对影响往复流散热性能的往复流入口的速度与温度和往复周期3个参数进行了优化，并揭示了它们对电池最高温度和温差的影响规律。
위해결전지모괴내부단체전지간적온도불균균성이영향전지적사용성능화수명적문제，본문중채용료일충왕복류냉각방식，사냉각공기류동방향주기성역전，이강저단향류공기냉각방식시단체전지연공기류방향적온도제도。결과표명，채용왕복류냉각방식후，재1C화13.33C방전배솔하，전지온도균균성분별제고료12.1%화62.4%，전지모괴적사용성능화안전성득도개선，전지사용수명득이제고。동시，문중환이용계산류체동역학허의시험여정교우화상결합，대영향왕복류산열성능적왕복류입구적속도여온도화왕복주기3개삼수진행료우화，병게시료타문대전지최고온도화온차적영향규률。
For solving the problem of the temperature unevenness among individual cells in battery module affecting service performance and lifespan of battery, a reciprocating air-flow cooling mode is adopted in this paper, with which the direction of cooling air flow is reversed periodically to reduce the temperature gradient in battery a-long air-flow direction in conventional cooling mode with unidirectional air flow. The results show that with recipro-cating flow cooling mode, the temperature evenness of battery increases by 12. 1% and 62. 4% respectively under 1C and 13. 33 C discharge current rates, so the service performance and safety of battery greatly improved with its service life extended. In addition, an optimization is also carried out on three parameters affecting heat dissipation performance, i. e. the velocity and temperature of air flow at inlet and reversal frequency, with the law of their in-fluence on the highest temperature and temperature difference of battery revealed.