US 2017/0365731 A1 · MAIN-GATE-FREE AND HIGH-EFFICIENCY BACK-CONTACT SOLAR CELL MODULE, MAIN-GATE-FREE AND HIGH-EFFICIENCY BACK-CONTACT ASSEMBLY, AND PREPARATION PROCESS THEREOF

Abstract

The present application relates to the field of solar cells, and in particular to a main-gate-free and high-efficiency back-contact solar cell module, assembly, and a preparation process thereof. The main-gate-free and high-efficiency back-contact solar cell module comprises solar cells and an electrical connection layer, a backlight side of the solar cells having P-electrodes connected to a P-type doping layer and N-electrodes connected to an N-type doping layer, wherein the electrical connection layer comprises a number of small conductive gate lines, part of which are connected to the P-electrodes on the backlight side of the solar cells while the other part of which are connected to the N-electrodes on the backlight side of the solar cells; and, the small conductive gate lines are of a multi-section structure. The present application has the following beneficial effects: the usage of silver paste is decreased, and the cost is reduced; moreover. The arrangement of small conductive gate lines in a multi-section structure reduces the series resistance and the transmission distance of a filling factor, so that the efficiency is improved and the stress on the cells from the small conductive gate lines can be effectively reduced.

Claims22

Dependent claims

A main-gate-free and high-efficiency back-contact solar cell module, comprising solar cells and an electrical connection layer, a backlight side of the solar cells having P-electrodes connected to a P-type doping layer and N-electrodes connected to an N-type doping layer, wherein the electrical connection layer comprises a number of small conductive gate lines, part of which are connected to the P-electrodes on the backlight side of the solar cells while the other part of which are connected to the N-electrodes on the backlight side of the solar cells;

and the small conductive gate lines are of a multi-section structure.

A method for preparing a main-gate-free and high-efficiency back-contact solar cell assembly, comprising the following steps:

Step 1:
connecting solar cell modules in series to form a solar cell layer, an electrical connection layer on a backlight side of each of the solar cell modules having a number of small conductive gate lines connected to P-electrodes and a number of small conductive gate lines connected to N-electrodes, the small conductive gate lines being of a multi-section structure;
electrically connecting a number of leads to electrodes or small conductive gate lines of a first solar cell, and aligning a second solar cell with the first solar cell so that P-electrodes on the second solar cell and N-electrodes on the first solar cell are on a same lead;
and, electrically connecting the leads to electrodes or small conductive gate lines of the second solar cell, and repeating the above operations to form a series connection structure, so as to form a solar cell layer;
and
Step 2:
successively stacking and laminating fronting material, packaging material, the solar cell layer, packaging material and backing material to obtain a solar cell assembly.

4 more elements

The method for preparing a main-gate-free and high-efficiency back-contact solar cell assembly according to 18, wherein a solar cell string is prepared in accordance with the Step 1, and the solar cell string comprises at least one solar cell;

and, busbar electrodes are arranged on two sides of the solar cell string, and the busbar electrodes are connected in series to form a solar cell layer.

Dependencies are inferred from the claim text.

Main-gate-free and high-efficiency back-contact solar cell module, main-gate-free and high-efficiency back-contact assembly, and preparation process thereof

Life of this patent

Main-gate-free and high-efficiency back-contact solar cell module, main-gate-free and high-efficiency back-contact assembly, and preparation process thereof

Life of this patent

Abstract

Claims22