▎ 摘　　要

NOVELTY - Graphene/polymer composite thermally conductive insulating film comprises an insulating layer, a thermal conductive layer and a protective layer stacked in sequence. The insulating layer includes a first polymer substrate film and a thermally conductive filler dispersed in the first polymer substrate film. The thermally conductive filler includes aluminum nitride, silicon carbide, and aluminum oxide. The thermally conductive layer includes a second polymer substrate film and a thermally conductive material dispersed in the second polymer substrate film. The thermally conductive material includes nanographene, carbon nanotubes and modified boron nitride. The modified boron nitride is obtained by doping nano graphene and carbon nanotubes in boron nitride. The protective layer includes a third polymer substrate film. USE - The thermally conductive insulating film is useful for heat dissipation of energy vehicle battery packs. ADVANTAGE - The thermally conductive insulating film: has excellent heat-conducting performance, and mechanical property, which can satisfy the user requirement. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing graphene/polymer composite thermally conductive insulating film comprising uniformly dispersing the heat conducting filler in the first polymer material, preparing film, obtaining the insulating layer film, uniformly dispersing the heat conducting material in the second polymer material, preparing film, obtaining the heat conducting layer film, making the third polymer material into film, obtaining protective layer film, combining the insulating layer film, heat conducting layer film and protective layer film to obtain the graphene/polymer composite thermally conductive insulating film.