【摘要】 如何有效防止热失控及热蔓延是锂离子电池模组设计的重点。为探究不同散热设计对锂离子电池模组热蔓延的控制能力,以钛酸锂电池模组为实验对象,对自然对流、表面液冷、极耳强迫风冷3种方式的热蔓延阻隔能力进行了研究。通过对比发现,有效抑制热蔓延的关键是增大热蔓延传播路径的阻力与提高散热能力,而表面散热的阻断方式更直接,可以实现对热蔓延的阻隔,效果远远优于极耳散热。更多还原

【Abstract】 How to prevent thermal runaway and thermal spread effectively is important in the design of lithium-ion battery modules. In order to explore the control ability of different heat dissipation design on the thermal spread of lithium-ion battery module, taking lithium titanate battery modules as the experimental object, the thermal spread blocking ability of natural convection, surface liquid cooling, and tab forced air cooling were studied. Through comparison, it is found that the key to suppressing thermal spread effectively is to increase the resistance of the spreading path and improve the heat dissipation capacity. The blocking method of surface cooling is more direct,which can block thermal spread, and the effect is far better than that of tab cooling.更多还原