【摘要】 基于红外热成像技术以及可视化测试手段,探究了三元软包锂电池在不同工作条件下表面温度变化特性以及生热规律。以环境温度,放电倍率,极耳夹持方式为三种变量条件,将其中两者耦合进行控制变量实验,通过监测电池表面温升情况,寻找该款电池的最佳工作的方式。保证电池在一定的工作温度下进行不同倍率放电实验,发现随着放电倍率的升高,生热量增多,电池表面温度升高;导电夹夹持极耳与铜片夹持极耳相比会导致极耳处过流不足,生热量急剧增加,电池表面温升显著,不利于电池散热,结合各组实验结果得出该款电池的最佳工作温度为25℃,面对放电倍率高的工况应该加强优化散热系统,这对散热优化方案的提出具有指导意义。更多还原

【Abstract】 Based on infrared thermal imaging technology and visual testing methods, the characteristics of surface temperature change and heat generation of ternary soft-packed lithium battery under different working conditions were explored. Among the three variable conditions of ambient temperature, discharge rate, and clamping method of lugs, two of them were coupled to conduct a controlled variable experiment. By monitoring the temperature rise of the battery surface, the best working condition for the battery was determined, at which the battery can discharge at different rates at a certain working temperature. It is found that as the discharge rate increases, the heat generation increases and the surface temperature of the battery rises. Compared with the copper-sheet clamping tab, the conductive clip clamping tab results in insufficient overcurrent at the pole ear and quick heat buildup at the surface of the battery. Therefore, this clamping method is not conducive to the heat dissipation of the battery. Combined with the experimental results, the best working temperature of the battery is 25 ℃. To cope with the working condition of high discharge rate, heat dissipation shall be enhanced. This research provides a guide for a heat dissipation optimization scheme.更多还原