Method for improving bonding force between battery piece and adhesive film

The invention discloses a method for improving the binding power of a battery piece and an adhesive film. The method specifically comprises the following steps: preparing a heterojunction battery comprising a battery main body, a transparent conductive film layer and a metal electrode; using plasma processing equipment to excite plasma to form a plasma excitation source, and using the plasma excitation source to process the surface of the transparent conductive film layer within a preset time; performing secondary plasma treatment on the surface of the transparent conductive film layer treated within the preset time; forming a metal electrode on the outer side of the transparent conductive film layer subjected to secondary plasma treatment, drying and curing to obtain a corresponding heterojunction cell, and sorting the heterojunction cell; the packaging adhesive film is prepared on the outer side of the transparent conductive film layer of the screened heterojunction battery, and lamination treatment is carr