Back-contact solar cell and solar cell module including same

A solar cell module, comprising a plurality of first back-contact solar cells and a plurality of second back-contact solar cells;

• wherein each of the plurality of first back-contact solar cells comprises:
• a substrate including a light-receiving surface and a back surface opposite to the light-receiving surface;
• wherein the substrate has a center region and connecting regions on opposite sides of the center region;
• a plurality of positive electrodes and a plurality of negative electrodes disposed on the back surface of the substrate;
• a plurality of auxiliary positive electrodes respectively corresponding to the plurality of positive electrodes, disposed on the light-receiving surface or disposed on both the light-receiving surface and a side surface of each of the connecting regions, and configured to be electrically connected to the plurality of positive electrodes, wherein each of the plurality of positive electrodes is electrically connected to a respective one of the auxiliary positive electrodes;
• and
• a plurality of auxiliary negative electrodes respectively corresponding to the plurality of negative electrodes, disposed on the light-receiving surface or disposed on both the light-receiving surface and the side surface of each of the connecting regions, and configured to be electrically connected to the plurality of negative electrodes, wherein each of the plurality of negative electrodes is electrically connected to a respective one of the auxiliary negative electrodes;
• wherein each of the plurality of second back-contact solar cells comprises:
• a plurality of positive electrodes and a plurality of negative electrodes disposed on a back surface of a substrate and no electrodes disposed on a light-receiving surface of the substrate;
• wherein:
• at least one of connecting regions of an individual first back-contact solar cell is overlapped with a part of an individual second back-contact solar cell for electrical connection;
• and
• the plurality of first back-contact solar cells are spaced apart, the plurality of positive electrodes of each second back-contact solar cell are electrically connected to the plurality of auxiliary positive electrodes of an adjacent first back-contact solar cell respectively;
• and
• the plurality of negative electrodes of each second back-contact solar cell are electrically connected to the plurality of auxiliary negative electrodes of an adjacent first back-contact solar cell.

A solar cell module, comprising:

• a plurality of back-contact solar cells, wherein each of the plurality of back-contact solar cells comprises:
• a substrate including a light-receiving surface and a back surface opposite to the light-receiving surface;
• wherein the substrate has a center region and connecting regions on opposite sides of the center region;
• a plurality of positive electrodes and a plurality of negative electrodes disposed on the back surface of the substrate;
• a plurality of auxiliary positive electrodes respectively corresponding to the plurality of positive electrodes, disposed on a side surface of each of the connecting regions, and configured to be electrically connected to the plurality of positive electrodes, wherein each of the plurality of positive electrodes is electrically connected to a respective one of the auxiliary positive electrodes;
• and
• a plurality of auxiliary negative electrodes respectively corresponding to the plurality of negative electrodes, disposed on the side surface of each of the connecting regions, and configured to be electrically connected to the plurality of negative electrodes, wherein each of the plurality of negative electrodes is electrically connected to a respective one of the auxiliary negative electrodes;
• wherein a first portion of an individual auxiliary positive electrode is disposed on the side surface of an individual connecting region and a second portion of the individual auxiliary positive electrode is configured to electrically connect to the first portion of the individual auxiliary positive electrode and an individual positive electrode;
• a first portion of an individual auxiliary negative electrode is disposed on the side surface of an individual connecting region and a second portion of the individual auxiliary negative electrode is configured to electrically connect to the first portion of the individual auxiliary negative electrode and an individual negative electrode;
• the plurality of back-contact solar cells are arranged successively, side surfaces of connecting regions of adjacent back-contact solar cells are attached together;
• the plurality of auxiliary positive electrodes of the adjacent back-contact solar cells are electrically connected, and the plurality of negative electrodes of the adjacent back-contact solar cells are electrically connected.