Back contact laminated solar cell string and back contact laminated solar cell module

Abstract

The invention discloses a back contact laminated solar cell string and a back contact laminated solar cell module. The back contact laminated solar cell string comprises a plurality of back contact solar cell pieces which are overlapped and arranged in sequence and are serially connected with one another, the positive electrode and the negative electrode of each back contact solar cell piece are arranged on the back face of each back contact solar cell piece respectively, a plurality of through holes are formed in the edge of one side of each back contact solar cell piece, a penetrating electrode is formed inside each through hole, and one of the positive electrode and the negative electrode of each back contact solar cell piece is led out to the front face of each back contact solar cellpiece through the corresponding penetrating through electrode; an overlapped region exists in every two adjacent back contact solar cell pieces, the through hole of the back contact solar cell piece positioned below is formed in the corresponding overlapped region, and every two adjacent back contact solar cell pieces are serially connected through the penetrating electrode of the back contact solar cell piece positioned below; an insulating adhesive layer is arranged between every two adjacent back contact solar cell pieces, and each insulating adhesive layer is positioned in the corresponding overlapped region. The insulating adhesive layers can reduce the hidden crack risk of the battery pieces.

Description

technical field [0001] The present invention generally relates to the field of photovoltaics, specifically to the field of back-contact solar cell components, and in particular to a back-contact stacked solar cell string and a back-contact stacked solar cell component. Background technique [0002] Stacked module (also called shingled module) technology is a new type of module design scheme. The battery sheets are superimposed and arranged, and connected into a battery string through conductive glue, solder paste and other materials, and then after series-parallel typesetting, the layers Pressed into components. By improving the interconnection structure design of the cells, more cells can be arranged in a limited area, improving the utilization of the space area and the power generation of the components. [0003] At present, back-contact solar cells (such as IBC, MWT, and EWT solar cells) have received widespread attention. Since there are no busbars on the front, or even...

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