Patent ID: 9660131
Date: 2017-05-23
CPC Classifications: C09J,H01L,Y02E,Y10T

Claim:
1. A method of manufacturing a solar cell module comprising a structure with connected solar cells, wherein the method comprises the steps of: (a) providing an electric conductor connecting member comprising a metal foil that has a first adhesive layer on a front side of the metal foil and a second adhesive layer on a back side of the metal foil, wherein neither adhesive layer is a solder layer; (b) arranging a first part of the electric conductor connecting member on a surface electrode of a first solar cell in the order of (1) metal foil, (2) first adhesive layer, and (3) surface electrode of the first solar cell; (c) hot pressing the first part of the electric conductor connecting member and the surface electrode of the first solar cell so that the metal foil of the first part of the electric conductor connecting member and the surface electrode of the first solar cell are electrically connected and bonded together; (d) arranging a second part of the electric conductor connecting member on a surface electrode of a second solar cell in the order of (1) metal foil, (2) second adhesive layer, and (3) surface electrode of the second solar cell; and (e) hot pressing the second part of the electric conductor connecting member and the surface electrode of the second solar cell so that the metal foil of the second part of the electric conductor connecting member and the surface electrode of the second solar cell are electrically connected and bonded together, wherein a ten-point height of roughness profile Rz1 (μm) on a surface of the surface electrode of the first solar cell facing the metal foil and a ten-point height of roughness profile Rz2 (μm) on a surface of the surface electrode of the second solar cell facing the metal foil are between 2 μm and 30 μm, and wherein the surface electrodes of the first solar cell and the second solar cell are bus electrodes, wherein a thickness of the first adhesive layer and the second adhesive layer satisfies the condition specified by the following formula (1), wherein in formula (1), t represents the thickness (μm) of the first adhesive layer and the second adhesive layer, and Rz represents a ten-point height of roughness profile (μm) of a surface of the surface electrode of the first solar cell facing the first adhesive layer and a surface of the surface electrode of the second solar cell facing the second adhesive layer.