Solar cell and photovoltaic module

Patent metadata

Field	Value
Publication number	US-2025338672-A1
Application number	US-202519097523-A
Country	US
Kind code	A1
Filing date	Apr 1, 2025
Priority date	Apr 28, 2024
Publication date	Oct 30, 2025
Grant date	—

Abstract

A solar cell includes a solar cell body, a plurality of fingers, and a plurality of first interconnection structures. At least a part of regions of different first interconnection structures distributed at intervals along a second direction are collinear with a same connection line of a plurality of connection lines. A quantity of connection lines located on the same target surface is N1, a quantity of first interconnection structures intersecting with a target line segment located on the target surface is N2, and N2<½N1. The target line segment is a connection line segment between a midpoint of an edge that has a larger length in two edges of the target surface extending along a first direction and being arranged opposite to each other and a vertex-angle endpoint corresponding to an edge that has a smaller length in the two edges.

First claim

What is claimed is:

1 . A solar cell, comprising:
a solar cell body, wherein the solar cell body has at least one target surface, the at least one target surface is at least one of a first surface or a second surface opposite to the first surface; a plurality of fingers arranged along a second direction on the at least one target surface, wherein the plurality of fingers each extends along a first direction perpendicular to the second direction; and a plurality of first interconnection structures arranged in an array along the first direction and the second direction on the at least one target surface, wherein each of the plurality of first interconnection structures is electrically connected to at least one of the plurality of fingers, wherein first interconnection structures arranged along the second direction comprise regions that are collinear with a same connection line of a plurality of connection lines arranged along the first direction, wherein a quantity of connection lines intersecting with a vector line segment having an inclination angle substantially equals to 45 degrees is greater than a quantity of first interconnection structures intersecting with the vector line segment.

2 . The solar cell according to claim 1 , wherein a ratio between a thickness of the solar cell body and a thickness of the first interconnection structure is greater than or equal to 0.005 and less than or equal to 0.1; or
a ratio between a cross-sectional area of the solar cell body and a cross-sectional area of the first interconnection structures is greater than or equal to 0.0003 and less than or equal to 0.02.

3 . The solar cell of according to claim 1 , wherein a quantity of first interconnection structures intersecting with a target line segment is less than one half of a quantity of connection lines located on the target surface, and wherein the target line segment connects a midpoint of a first edge along a first direction of the target surface and a vertex-angle endpoint corresponding to a second edge of the target surface opposite to the first edge, the first edge is longer than the second edge.

4 . The solar cell according to claim 3 , wherein the quantity of first interconnection structures intersecting with the target line segment is 0.

5 . The solar cell according to claim 3 , wherein a distance between a geometric center of one the plurality of first interconnection structures intersecting with the target line segment or the vector line segment and a median line of the solar cell along the second direction is greater than a distance between the geometric center of one of the plurality of first interconnection structures intersecting with the target line segment or the vector line segment and an edge of the solar cell along the second direction.

6 . The solar cell according to claim 3 , wherein the solar cell is absent of a busbar, the target surface comprises a middle region and an edge region arranged along the second direction, at least a portion of the plurality of fingers in the edge region is in electrical contact with the first interconnection structure.

7 . The solar cell according to claim 6 , wherein the solar cell has a back contact substrate structure, the plurality of fingers comprise a plurality of first fingers and a plurality of second fingers with opposite polarities, the plurality of first fingers and the plurality of second fingers are alternately distributed along the second direction, at least a portion of the plurality of first fingers in the edge region are in electrical contact with respective first interconnection structures of the plurality of first interconnection structures, and at least a portion of the plurality of second fingers in the edge region are in electrical contact with respective first interconnection structures of the plurality of first interconnection structures.

8 . The solar cell according to claim 6 , further comprising:
a plurality of second interconnection structures arranged on the target surface, each of the plurality of second interconnection structures is electrically connected to at least one of the plurality of fingers, a size of the plurality of second interconnection structures is less than a size of the plurality of first interconnection structures, at least a portion of regions of each of the plurality of second interconnection structures are located on a same straight line, and are collinear with the connection line; a portion of the plurality of fingers located on the same target surface are connection electrodes and are in contact with the plurality of first interconnection structures, and a remaining portion of the plurality of fingers are in contact with the plurality of second interconnection structures; and at least one of the connection electrodes located in the edge region is in contact with the plurality of first interconnection structures, different first interconnection structures in contact with a same connection electrode are distributed along the first direction, a distance between two adjacent connection electrodes along the second direction is different from a distance between geometric centers of two adjacent first interconnection structures in contact with a same connection electrode.

9 . The solar cell according to claim 8 , wherein a quantity of the plurality of second interconnection structures intersecting with the target line segment or the vector line segment is less than the quantity of connection lines on the target surface and is greater than a third of the quantity of connection lines on the target surface.

10 . The solar cell according to claim 1 , further comprising:
a plurality of busbars corresponding to connection lines arranged on a target surface along the first direction, wherein each of the plurality of busbars extends along the second direction and is electrically connected to (1) a respective one of a plurality of fingers having a same polarity as the plurality of busbars, and (2) at least one of the plurality of first interconnection structures.

11 . The solar cell according to claim 10 , wherein the plurality of busbars are connection electrodes, wherein at least one of the connection electrodes is in contact with the plurality of first interconnection structures, wherein first interconnection structures in contact with a same connection electrode are distributed along the second direction, and wherein a distance between two adjacent connection electrodes along the first direction is different from a distance between geometric centers of two adjacent first interconnection structures in contact with the same connection electrode.

12 . A solar cell, comprising:
a solar cell body, wherein the solar cell body has at least one target surface, the at least one target surface is at least one of a first surface or a second surface opposite to the first surface; a plurality of fingers arranged along a second direction on the at least one target surface, wherein the plurality of fingers each extends along a first direction perpendicular to the second direction; and a plurality of first interconnection structures arranged in an array along the first direction and the second direction on the at least one target surface, wherein each of the plurality of first interconnection structures is electrically connected to at least one of the plurality of fingers, wherein first interconnection structures arranged along the second direction comprise regions that are collinear with a same connection line of a plurality of connection lines arranged along the first direction, wherein a quantity of connection lines on the target surface is greater than a quantity of the first interconnection

Assignees

• Longi Green Energy Technology Co Ltd

Inventors

• Li Zhenguo
• Tong Hongbo
• Deng Shengjie
• Li Jinyu
• Yu Long
• Qiu Jialiang
• Fan Kai

Classifications

• H10F19/908

  for back-contact photovoltaic cells · CPC title

• H10F77/219

  Arrangements for electrodes of back-contact photovoltaic cells · CPC title

• H10F77/937

  Busbar structures for modules · CPC title

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• H10F19/902

  for series or parallel connection of photovoltaic cells · CPC title