【摘要】 动力电池热管理的目标不仅是保证电池模组在合适的温度范围内工作,而且要尽量保证模组内部温度均匀。液冷板是电池模组主动液体冷却系统的一个重要组成部分,此前对电池热管理的研究大多集中在液冷板流道结构及冷板排布方式对电池模组温度分布的影响,而忽略了冷却液的沿程温升对模组温度均匀性的影响。根据间壁式传热原理,提出采用液冷侧非线性强化传热的方式,以实现热源侧壁面温度均匀分布的均温液冷板结构。以某一动力电池模组液冷散热要求为例,构建了非线性传热强化液冷均温板模型,并进行了相应的数值模拟。结果表明,提出的均温液冷板能有效实现动力电池模组均温性要求。更多还原

【Abstract】 The aims of power battery thermal management include controlling the battery temperature not only within the proper range but also with the relative uniformity. The liquid cold plate is an important component of the active liquid cooling system of the battery. Previous studies on battery thermal management mostly focused on the effects of the flowing channel structure and layout of the cold plate on temperature distribution of the battery module. However,the effect of coolant temperature rise along the flowing direction on the battery temperature uniformity is neglected. Based on the fundamental principles of the recuperative heat transfer,the nonlinear heat transfer enhancement method in the coolant channel was employed with a view of controlling the temperature uniformity. A liquid cold plate structure with the nonlinear heat transfer enhancement was proposed to satisfy the cooling requirements of a battery module,and the numerical simulation of heat transfer performance was carried out. The results show that the proposed liquid cold plate can effectively achieve the temperature uniformity.更多还原