Insulating adhesive, tab assembly, battery cell, and electric device

Abstract

An insulating adhesive includes a base layer and a surface layer. Along the thickness direction of the base layer, at least one side of the base layer is connected to the surface layer. A thickness ratio of the surface layer to the base layer is 1 to 4, and a melt index of the surface layer (at 230° C., 2.16 kg) is 4 g/10 min to 20 g/10 min. By setting the melt index of the surface layer and the thickness ratio of the surface layer to the base layer, the flowability upon melting of the surface layer is improved, and the thickness of the surface layer is increased, thereby expanding the adhesive overflow mass formed upon melting of the surface layer, enhancing the encapsulation tensile strength of the insulating adhesive under normal temperature conditions, improving the encapsulation reliability of the battery cell under normal temperature conditions.

Dependencies are inferred from the claim text.