Connecting film for photovoltaic battery piece

The invention belongs to the field of photovoltaic technology, and discloses a connecting film for a photovoltaic battery piece, which is used for fixing an electric conductor on the battery piece and comprises a base material layer and a water-based coating. The thickness of the base material layer is 10-200 [mu]m, and the base material layer is used for supporting the connecting film; the thickness of the water-based coating is 3-50 [mu]m, and the water-based coating is arranged on at least part of the surface of one side of the base material layer and used for at least bonding the electric conductor and the battery piece together. The softening point temperature of the water-based coating is lower than that of the base material layer. The connecting film for the photovoltaic battery piece is applied to a solar cell module, meets the technical requirement that the viscidity of the two faces of the connecting film for the photovoltaic battery piece is different, is used for bonding an electric conductor and