锂电池包内部液冷板的换热效率及温度分布是决定包内电芯温度控制及温差差异的关键因素，因此液冷板的结构设计及布局一直都是电池热管理系统开发的最关键对象。提出一种适用于锂电池包内液冷系统的新型高效换热斜翅片型液冷板结构，并应用正交试验法对该结构进行了全特征结构参数研究。选取电池表面最高温度、电池表面温差及液冷板压降作为响应量，通过极差分析获得对响应量最敏感的结构参数——斜翅片高度。应用数值模拟手段和性能评估指标(PEC)就斜翅片高度和入口雷诺数对液冷板整体散热性能的影响进行研究分析。结果表明：传统直流道中增加斜翅片结构可以引起扰流，并增大液冷板有效对流换热面积，极大提升液冷板的换热性能；相比于传统直流道液冷板，较高的斜翅片往往会带来一定的压降损失，但其优秀的散热性能可以弥补这一额外损失。

The heat exchange efficiency and temperature distribution of liquid-cooling plate inside the lithium battery pack are the key factors determining the temperature control of battery cells inside the pack and the difference in temperature. Therefore, the structural design and layout of liquid-cooling plate has always been the most critical object in the development of battery thermal management system. A new high-efficiency heat exchange oblique-fin-typed liquid-cooling plate structure was proposed to be suitable for the liquid cooling system in lithium battery pack, and the orthogonal test method was used to study the structure with full characteristic structural parameters. The maximum battery surface temperature, the temperature difference between the battery surface and the liquid-cooling plate pressure drop were selected as response quantities. The structural parameter that was the most sensitive to the amount of response, the height of oblique fin, was thus obtained by polar analysis. Finally, the numerical simulation and performance evaluation criteria(PEC) were applied to fully investigate and analyze the effects of oblique fin height and inlet Reynolds number on the overall thermal performance of liquid-cooling plate. The results show that increasing the oblique fin structure in the traditional DC channel can effectively cause disturbed flow and increase the effective convective heat exchange area of liquid-cooling plate, which greatly improves the heat exchange performance of liquid-cooling plate. Compared to the traditional DC channel liquid-cooling plates, higher oblique fins tend to bring a certain amount of pressure drop loss, but its excellent heat dissipation performance can compensate for the extra loss.