CN220731542U

CN220731542U - Solar cell

Info

Publication number: CN220731542U
Application number: CN202322436559.6U
Authority: CN
Inventors: 洪成浩; 闫用用; 刘向东; 周锦凤; 王建明; 章康平; 介雷; 胥星星
Original assignee: Yidao New Energy Technology Co ltd
Current assignee: Yidao New Energy Technology Co ltd
Priority date: 2023-09-06
Filing date: 2023-09-06
Publication date: 2024-04-05
Anticipated expiration: 2033-09-06

Abstract

The embodiment of the application provides a solar cell, which comprises: a battery sheet main body; the main grids are arranged on the surface of the battery piece main body, the extending direction of the main grids is a first direction, the main grids are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction; the thin grids are arranged on the surface of the battery piece main body, the extending direction of the thin grids is the second direction, the thin grids are arranged at intervals along the first direction, and the thin grids are lapped on the main grid; and the anti-breaking grids are arranged at the joint of the main grid and the fine grid, the extending direction of the anti-breaking grids is the second direction, and the anti-breaking grids are positioned at one side of the main grid along the first direction. In the solar cell, the anti-breaking grid is arranged on one side of the main grid along the first direction, so that the total structural length of the anti-breaking grid on the surface of the solar cell is reduced, the silver paste consumption of the anti-breaking grid is effectively reduced, and the structural complexity and cost of the cell are reduced.

Description

Solar cell

Technical Field

The application belongs to the technical field of solar cells, and particularly relates to a solar cell.

Background

When the solar cell is illuminated, current is generated, and the current is collected mainly by the grid lines arranged on the surface of the cell. A fine grid for collecting current and a main grid for collecting current collected by the fine grid are generally arranged on the surface of the battery piece. Further, in order to reduce the influence of the broken grid phenomenon of the battery assembly on the performance of the battery piece in the series welding process, an anti-broken grid is printed at the joint of the main grid and the fine grid on the surface of the battery piece for current transmission.

In the prior art, the main material of the anti-breaking grid is silver paste, the shape of the anti-breaking grid is generally designed into octagon or hexagon, and the anti-breaking grid is symmetrically arranged on two sides of the main grid along the extending direction of the fine grid. In order to obtain the highest possible photoelectric conversion efficiency, the current solar cell structural design has entered the times of multiple main grids and fine grids, and the number of breakage-preventing grids on the surface of the cell has also increased. Thus, not only can the consumption of silver paste for preventing the breakage of the grid on the battery piece be increased, but also the structural complexity and the cost of the battery piece can be increased.

Disclosure of Invention

The application aims at providing a solar cell with an anti-breaking grid so as to solve the problem that the unit consumption of silver paste in the existing anti-breaking grid design is high.

In order to solve the technical problems, the application is realized as follows:

the application discloses solar cell piece includes:

a battery sheet main body;

the plurality of main grids are arranged on the surface of the battery piece main body, the extending direction of the main grids is a first direction, the plurality of main grids are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction;

the thin grids are arranged on the surface of the battery piece main body, the extending direction of the thin grids is the second direction, the thin grids are arranged at intervals along the first direction, and the thin grids are lapped on the main grid;

and the anti-breaking grids are arranged at the lap joint part of the main grid and the fine grid, the extending direction of the anti-breaking grids is the second direction, and the anti-breaking grids are positioned at one side of the main grid along the first direction.

Optionally, a plurality of the breaking preventing grids are alternately arranged on both sides of the main grid along the first direction.

Optionally, the width of the anti-breaking grating along the first direction gradually decreases from one end close to the main grating to one end far away from the main grating.

Optionally, the orthographic projection shape of the anti-breaking grid on the surface of the battery piece main body is isosceles trapezoid.

Optionally, the length of the anti-breaking grating along the second direction ranges from 0.4mm to 0.9 mm.

Optionally, the width of the anti-breaking grating near one end of the main grating along the first direction ranges from 0.03mm to 0.08 mm.

Optionally, the width of the anti-breaking grating at the end far from the main grating along the first direction is consistent with the width of the fine grating.

The anti-breaking grid is made of silver paste.

Optionally, a plurality of the main gates are equally spaced along the second direction.

Optionally, a plurality of the fine grids are equally spaced along the first direction.

Compared with the prior art, the beneficial effects of the solar cell disclosed in the application are as follows:

through with the anti-breaking grid is in one of them side of main grid along the first direction, reduced the structure total length of anti-breaking grid on solar wafer surface, effectively reduced the silver thick liquid consumption of anti-breaking grid, reduced the structure complexity and the cost of battery piece.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic view of a solar cell of the present utility model;

FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;

FIG. 3 is a schematic view of the structure of the breakage-proof gate of the present utility model;

FIG. 4 is an enlarged schematic view of another embodiment of the present utility model;

fig. 5 is a schematic view of a broken gate structure according to another embodiment of the present utility model.

Reference numerals: 1-a battery piece main body; 2-main grid; 3-fine grid; 4-breaking-preventing grid.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The embodiment of the application provides a solar cell, the solar cell includes along the first direction prevent disconnected bars of arranging in one of them side of main bars, prevent disconnected bars can reduce the influence of the disconnected bars phenomenon that battery pack appears in the series welding in-process to cell performance.

Referring to fig. 1, a schematic structural diagram of a solar cell of the present application is shown; referring to fig. 2, an enlarged schematic view of the portion a of fig. 1 is shown. The direction indicated by the broken line L1 is a first direction, and the direction indicated by the broken line L2 is a second direction.

As shown in fig. 1 and 2, the solar cell may specifically include: the battery piece body 1 is provided with main grids 2 arranged on the surface of the battery piece body 1, and the main grids 2 extend along a first direction and are arranged at intervals along a second direction, and the second direction is perpendicular to the first direction; the thin grids 3 are arranged on the surface of the battery piece main body, the thin grids 3 extend along the second direction and are arranged at intervals along the first direction, and the thin grids 3 are lapped on the main grid 2; and the anti-breaking grating 4 is arranged at the lap joint part of the main grating 2 and the fine grating 3, the extending direction of the anti-breaking grating 4 is the second direction, and the anti-breaking grating is positioned at one side of the main grating 2 along the first direction.

In this embodiment of the application, through setting up the broken gate 4 in the wherein one side of main grid 2 along the first direction, reduced the structure total length of broken gate 4 on solar wafer main part 1 surface, effectively reduced the silver thick liquid consumption of broken gate, reduced the structure complexity and the cost of battery piece.

In a specific application, on two sides of any main grid 2 on the surface of the battery piece main body 1, the anti-breaking grid 4 can be firstly arranged on the left side of the main grid 2 from top to bottom along the first direction, the next can be arranged on the right side of the main grid 2, the next can be continuously arranged on the left side of the main grid 2, and so on. By the arrangement, the influence of broken grids formed in the series welding process of the main grid 2 and the fine grid 3 on the performance of the battery piece can be avoided, the total length of the structure of the broken-preventing grid 4 on the surface of the main body of the battery piece can be effectively reduced, and the consumption of broken-preventing grid silver paste is reduced.

In the embodiment of the present application, as shown in fig. 3, the width of the breakage preventing gate 4 in the first direction gradually decreases from the end close to the main gate 2 to the end far from the main gate 2. By the arrangement, the effect of current transmission of the anti-breaking grid 4 is met, the distribution area of the anti-breaking grid on the surface of the battery piece main body can be further reduced, and the unit consumption of silver paste of the anti-breaking grid is reduced.

In a specific application, as shown in fig. 3, the orthographic projection shape of the anti-breaking grid 4 on the surface of the battery piece main body 1 may be isosceles trapezoid, so that the regular shape design can reduce the anti-breaking printing difficulty and improve the aesthetic property of the solar battery piece.

In the embodiment of the application, the length of the breaking preventing grating 4 along the second direction ranges from 0.4mm to 0.9mm, and the width of the breaking preventing grating along the first direction, which is close to one end of the main grating 2, ranges from 0.03mm to 0.08 mm.

In a specific application, the length of the break-preventing grating 4 in the second direction may be set to 0.4mm, 0.5mm, 0.7mm, 0.9mm, etc., and the width in the first direction at the end near the main grating 2 may be set to 0.03mm, 0.05mm, 0.06mm, 0.08mm, etc., and the width in the first direction at the end far from the main grating 2 may be set to coincide with the width of the fine grating 3 (e.g., 0.03mm, 0.05mm, 0.06mm, 0.08mm, etc.). The structure size of the anti-breaking grid of the prior art is more matched with that of the anti-breaking grid, and the anti-breaking grid can be more matched with the printing equipment commonly seen in the market at present.

In the embodiment of the present application, as shown in fig. 2, the plurality of main grids 2 are disposed at equal intervals along the second direction, and the plurality of fine grids 3 are disposed at equal intervals along the first direction.

In a specific application, the plurality of main grids 2 are arranged at equal intervals along the second direction, the plurality of fine grids 3 are arranged at equal intervals along the first direction, the intervals between the main grids 2 are larger than the intervals between the fine grids 3, and the number of the fine grids 3 is larger than that of the main grids 2. By the arrangement, the non-uniformity of the electrical performance of the battery piece at different positions can be reduced, and the photoelectric conversion efficiency of the battery piece is improved.

In another embodiment of the present application, as shown in fig. 4 and 5, the front projection shape of the anti-breaking grid 4 on the surface of the battery plate main body 1 is a hexagon symmetrical to the main grid 2, and is disposed at the overlapping position of the main grid 2 and the fine grid 3 along the first direction at intervals. The length of the breakage preventing grating 4 in the second direction ranges from 0.8mm to 1.8mm, the width of the breakage preventing grating 4 in the first direction at the end close to the main grating 2 ranges from 0.03mm to 0.08mm, the width of the breakage preventing grating in the first direction at the side far away from the main grating 2 is consistent with the width of the fine grating 3, and the width of the breakage preventing grating in the first direction at the end close to the main grating is larger than the width far away from the main grating. Because the current battery plates are all of dense grid design, under the condition that continuous deviation does not occur to cause welding grid breakage, current produced by the battery plates can be transmitted from the nearby thin grid to the welding strip, and the grid breakage cannot be displayed. Therefore, the design reduces the total length of the structure of the anti-breaking grid on the surface of the solar cell on the premise of not affecting the electrical performance of the cell, effectively reduces the silver paste consumption of the anti-breaking grid, and reduces the structural complexity and cost of the cell.

In a specific application, the length of the break-preventing grating 4 in the second direction may be set to 0.8mm, 1.0mm, 1.4mm, 1.8mm, etc., and the width in the first direction at the end near the main grating 2 may be set to 0.03mm, 0.05mm, 0.06mm, 0.08mm, etc., and the width in the first direction at the end far from the main grating 2 may be set to coincide with the width of the fine grating 3 (0.03 mm, 0.05mm, 0.06mm, 0.08mm, etc.). The structure size of the anti-breaking grid of the prior art is more matched with that of the anti-breaking grid, and the anti-breaking grid can be more matched with the printing equipment commonly seen in the market at present.

By the solar cell in the embodiment, the total structural length of the anti-breakage grid on the surface of the solar cell is reduced. Because the current solar cell thin grid density is relatively high, under the condition that the grid breakage is caused by welding due to no continuous deviation, the current generated by the cell can be transmitted to the welding strip from a nearby path, and the grid breakage cannot be displayed. Therefore, the method and the device can ensure the reliability of the solar cell, simultaneously effectively reduce the silver paste unit consumption of the breakage-proof grid, and also reduce the structural complexity and cost of the cell.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A solar cell, comprising:

a battery sheet main body;

2. The solar cell according to claim 1, wherein a plurality of the breakage preventing grids are alternately arranged on both sides of the main grid in the first direction.

3. The solar cell according to claim 1, wherein the width of the breakage preventing grid in the first direction gradually decreases from an end closer to the main grid to an end farther from the main grid.

4. The solar cell according to claim 1, wherein the orthographic projection of the anti-breakage grid on the surface of the cell body is isosceles trapezoid.

5. The solar cell according to claim 1, wherein the length of the anti-breakage grid in the second direction ranges between 0.4mm and 0.9 mm.

6. The solar cell of claim 1, wherein the width of the break-preventing grid along the first direction at an end near the primary grid is in a range of 0.03mm to 0.08 mm.

7. The solar cell of claim 1, wherein the width of the break-preventing grid at an end remote from the main grid in the first direction is consistent with the width of the fine grid.

8. The solar cell according to any one of claims 1-7, wherein the breakage-proof grid material is silver paste.

9. The solar cell according to claim 1, wherein a plurality of the main grids are disposed at equal intervals along the second direction.

10. The solar cell of claim 1, wherein a plurality of the fine grids are equally spaced along the first direction.