CN215451424U

CN215451424U - MBB solar cell and solar cell module

Info

Publication number: CN215451424U
Application number: CN202122155008.3U
Authority: CN
Inventors: 李吉; 时宝; 江中强; 陈刚
Original assignee: Zhejiang Aiko Solar Energy Technology Co Ltd; Guangdong Aiko Technology Co Ltd; Tianjin Aiko Solar Energy Technology Co Ltd; Zhuhai Fushan Aixu Solar Energy Technology Co Ltd
Current assignee: Zhejiang Aiko Solar Energy Technology Co Ltd; Guangdong Aiko Technology Co Ltd; Tianjin Aiko Solar Energy Technology Co Ltd; Zhuhai Fushan Aixu Solar Energy Technology Co Ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-01-07
Anticipated expiration: 2031-09-07

Abstract

The utility model belongs to the technical field of solar cells, and particularly relates to an MBB solar cell and a solar cell module.

Description

MBB solar cell and solar cell module

Technical Field

Background

MBB cells use a multi-master grid design, e.g., 6, 7, 9, 12 master grids. The current collection capacity of the main grid is improved, internal loss is reduced, the shading area is reduced, the effective light receiving area is increased, and the power of the component is improved by at least one gear.

The conventional MBB battery mainly adopts a design scheme of a bonding pad and a narrow main grid, and a large amount of silver paste needs to be consumed in the printing process, so that the production cost is greatly increased. Therefore, designing a low-cost MBB cell has been one of the issues of intense research by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides an MBB solar cell, and aims to solve the technical problem that production cost is greatly increased due to the fact that a large amount of silver paste needs to be consumed in the printing process of the conventional MBB solar cell.

The MBB solar cell comprises a cell substrate, a plurality of main grids, auxiliary grids and pad structures, wherein the main grids, the auxiliary grids and the pad structures are arranged on the cell substrate, the main grids and the auxiliary grids are perpendicular to each other, the end parts of the main grids are connected with the pad structures, and a plurality of hollow parts are arranged inside the main grids.

Furthermore, the hollow parts are distributed in an array form.

Further, the shape of the hollow-out part is round and/or square.

Furthermore, the pad structure comprises a collecting part, a short grid connecting grid and two short grids, wherein the short grids are connected with the collecting part through the short grid connecting grid, and the approaching distance of the short grids from the approaching part to the far part from the collecting part is gradually increased.

Further, the sub-grid is connected to the collecting part by a first sub-grid connection grid, and the width of the first sub-grid connection grid gradually decreases from the approach to the distance from the collecting part.

Furthermore, the auxiliary grid is connected with the short grid through a second auxiliary grid connecting grid, and the width of the second auxiliary grid connecting grid is gradually reduced from close to far away from the short grid.

Furthermore, the auxiliary grid is connected with the main grid through a third auxiliary grid connecting grid, and the width of the third auxiliary grid connecting grid is gradually reduced from the close to the far away from the main grid.

The utility model also provides a solar cell module comprising the MBB solar cell.

The MBB solar cell has the beneficial effects that the MBB solar cell comprises a cell substrate, a plurality of main grids, auxiliary grids and a pad structure, wherein the main grids, the auxiliary grids and the pad structure are arranged on the cell substrate, the main grids and the auxiliary grids are perpendicular to each other, the end parts of the main grids are connected with the pad structure, a plurality of hollow parts are arranged inside the main grids, and in the process of welding components, as the welding parts are mainly positioned at the position of the pad structure and the position of a non-pad structure has no requirement on welding tension, the hollow parts are arranged inside the main grids, so that the quality of the cell can be ensured, and the consumption of silver paste can be reduced, and the production cost is greatly reduced.

Drawings

FIG. 1 is a schematic diagram of an MBB cell provided by an embodiment of the present invention;

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

fig. 3 is an enlarged view of a portion B of fig. 2.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

The utility model provides an MBB solar cell, which comprises a cell substrate 1, and a plurality of main grids 2, auxiliary grids 3 and pad structures 4 which are arranged on the cell substrate 1, wherein the main grids 2 and the auxiliary grids 3 are arranged vertically, the end parts of the main grids 2 are connected with the pad structures 4, a plurality of hollowed-out parts 21 are arranged inside the main grids 2, and in the process of welding a component, as the welding parts are mainly positioned at the positions of the pad structures 4 and the positions of the non-pad structures have no requirement on welding tension, the hollowed-out parts 21 are arranged inside the main grids 2, so that the quality of a cell piece can be ensured, and the consumption of silver paste can be reduced, and the production cost can be greatly reduced.

Example one

Referring to fig. 1, in one embodiment, an MBB solar cell is provided, which includes a cell substrate 1, a plurality of main grids 2, sub-grids 3 and pad structures 4 disposed on the cell substrate 1, where the main grids 2 and the sub-grids 3 are disposed perpendicular to each other, an end of the main grid 2 is connected to the pad structure 4, and a width of the main grid 2 is smaller than a width of the pad structure 4,

referring to fig. 3, a plurality of hollow portions 21 are disposed inside the main grid 2. In the assembly welding process, because the welding part is mainly located the position of pad structure 4, no pad structure position does not have the requirement to welding pulling force, that is to say, main bars 2 position does not have the requirement to welding pulling force, then is equipped with fretwork portion 21 in main bars 2 inside, can reduce silver thick liquid consumption when guaranteeing the battery piece quality to greatly reduced manufacturing cost.

In the present embodiment, referring to fig. 3, the hollow portions 21 are distributed in an array. Specifically, the hollow portions 21 are provided in plural, and are arranged in a plurality of rows and columns in an evenly distributed manner.

In this embodiment, the shape of the hollow portion 21 is circular and/or square, and the shape is regular and easy to process. It should be noted that, in other embodiments, the shape of the hollow portion 21 may be other types such as a triangle.

Specifically, referring to fig. 2, the pad structure 4 includes a collecting portion 41, a short grid connection grid 42, and two short grids 43, the short grids 43 are connected to the collecting portion 41 through the short grid connection grid 42, and the short grids 43 gradually increase from a close distance to a distance away from the collecting portion 41. The pad structure 4 forms a U-shaped area, the problem of hidden cracking of assembly welding can be effectively solved, and meanwhile, the silver consumption can be further reduced through the hollow design.

The short gate connecting gates 42 may be trapezoidal, and preferably are isosceles trapezoids.

In the present embodiment, referring to fig. 2, the sub-grid 3 is connected to the collecting part 41 through a first sub-grid connecting grid 52, the sub-grid 3 is in conductive connection with the collecting part 41, and the width of the first sub-grid connecting grid 52 gradually decreases from the close to the far away from the collecting part 41. For example, the first sub-grid connection grid 52 may have a trapezoidal configuration.

Referring to fig. 2, the sub-gate 3 is connected to the short gate 43 through a second sub-gate connection gate 51, the sub-gate 3 is electrically connected to the short gate 43, and the width of the second sub-gate connection gate 51 gradually decreases from the close to the far away from the short gate 43. For example, the second sub-gate connection gate 51 may be disposed in a trapezoid shape.

Referring to fig. 3, the auxiliary grid 3 is connected to the main grid 2 through a third auxiliary grid connecting grid 53, the auxiliary grid 3 is in conductive connection with the main grid 2, and the width of the third auxiliary grid connecting grid 53 gradually decreases from the close to the far away from the main grid 2. For example, the third sub-gate connecting gate 53 may be disposed in a trapezoid shape.

Example two

A second embodiment provides a solar cell module, which includes the MBB solar cell according to the first embodiment. By adopting the solar cell module of the MBB solar cell according to the first embodiment, in the module welding process, as the welding part is mainly positioned at the position of the pad structure 4, the position of the non-pad structure has no requirement on the welding tension, that is, the position of the main grid 2 has no requirement on the welding tension, the hollow part 21 is arranged in the main grid 2, the quality of the cell piece can be ensured, and the consumption of silver paste can be reduced, so that the production cost is greatly reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The MBB solar cell is characterized by comprising a cell substrate, a plurality of main grids, auxiliary grids and a pad structure, wherein the main grids, the auxiliary grids and the pad structure are arranged on the cell substrate, the main grids are perpendicular to the auxiliary grids, the end portions of the main grids are connected with the pad structure, and a plurality of hollow portions are arranged inside the main grids.

2. The MBB solar cell of claim 1, wherein the voids are distributed in an array.

3. The MBB solar cell of claim 1, wherein the hollowed-out portion is circular and/or square in shape.

4. The MBB solar cell of claim 1, wherein the pad structure comprises a collector portion, a short grid connection grid, and two short grids, the short grids are connected with the collector portion through the short grid connection grid, and the short grids gradually increase in distance from the collector portion to the collector portion.

5. The MBB solar cell of claim 4, wherein the sub-grid is connected to the collection portion by a first sub-grid connection grid, the first sub-grid connection grid gradually decreasing in width from near to far from the collection portion.

6. The MBB solar cell of claim 4, wherein the sub-grid is connected to the short grid by a second sub-grid connection grid, the second sub-grid connection grid gradually decreasing in width from near to far from the short grid.

7. The MBB solar cell of claim 1, wherein the secondary grid is connected to the primary grid by a third secondary grid connection grid, the third secondary grid connection grid gradually decreasing in width from proximal to distal to the primary grid.

8. A solar cell module comprising the MBB solar cell of any one of claims 1 to 7.