申请人:Dongguan Amperex Technology Limited
公开号:US10686226B2
公开(公告)日:2020-06-16
The embodiment of the present application relates to the field of Li-ion battery and, in particular, to a thermal conductive adhesive and a secondary battery containing the thermal conductive adhesive. The thermal conductive adhesive is prepared through adding thermal conductive filling material in the hot melt adhesive system, which performs good thermal conductivity and adhering property, and can stably adhere the safety component with the cell, meanwhile transferring, via the thermal conductive adhesive, heat of the cell to the safety component rapidly, so that the safety component cuts off the circuit to protect the cell during overcharge; the thermal conductive adhesive has high initial viscosity, which increases good contact between the protection device and the cell through the adhesion, thereby reduces situations that the thermal conductive adhesive is separated from the cell due to inflation and deformation of the cell.
本申请的实施方案涉及锂离子电池领域,尤其涉及一种导热粘合剂和含有该导热粘合剂的二次电池。导热粘合剂是通过在热熔粘合剂体系中加入导热填充材料制备而成,具有良好的导热性和粘合性,可将安全元件与电芯稳定粘合,同时通过导热粘合剂将电芯的热量迅速传递给安全元件,使安全元件在过充电时切断电路,保护电芯;导热粘合剂具有较高的初始粘度,可通过粘合增加保护装置与电池之间的良好接触,从而减少导热粘合剂因电池膨胀和变形而与电池分离的情况。