CN216528906U

CN216528906U - Laminated tile battery piece with hollow structure

Info

Publication number: CN216528906U
Application number: CN202122598268.8U
Authority: CN
Inventors: 王韫清; 王鹏; 陈良水; 从海泉
Original assignee: Huansheng Photovoltaic Jiangsu Co Ltd
Current assignee: Huansheng Photovoltaic Jiangsu Co Ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-05-13
Anticipated expiration: 2031-10-27

Abstract

The utility model provides a laminated tile battery piece with a hollow structure, which comprises a plurality of main grids and auxiliary grids which are connected with each other, wherein a plurality of hollow points are distributed in a front area formed by the connection points of the main grids and the auxiliary grids. The utility model has the beneficial effects that the problems that the existing hollowed-out design is a high-density small hole design, and bubbles are generated in the subsequent conductive adhesive printing step, so that the contact effect of the conductive adhesive and a battery piece is poor, the conductive performance and the tensile force of the battery piece are adversely affected, the reliability is seriously lost, and the production efficiency is reduced are solved, and the utility model provides the laminated tile battery piece with the hollowed-out structure, wherein the strip-shaped hollowed-out design is adopted, so that the bubble risk caused by air pressure in the conductive adhesive printing process possibly generated by the high-density small hole design is reduced, the reliability of the battery piece is improved, and the production efficiency is improved; meanwhile, the contact area between the front area and the conductive adhesive can be further increased through the strip-shaped hollow design, so that the contact resistance is reduced, and the pulling force is improved.

Description

Laminated tile battery piece with hollow structure

Technical Field

The utility model belongs to the technical field of manufacturing of crystalline silicon solar cells and laminated assemblies, and particularly relates to a laminated cell with a hollow structure.

Background

At present, in the industry of manufacturing crystalline silicon solar cells and laminated assemblies, a front area formed by connecting points of main grids and auxiliary grids of conventional laminated solar cells is designed to be solid, and from the perspective of reducing cost, a front area hollow design is developed in manufacturing production. However, the current hollow design is a high-density small hole design, and the design has the following defects: in the subsequent production and use process, in the step of printing the conductive adhesive, the phenomenon of generating bubbles can occur, so that the contact effect of the conductive adhesive and the battery piece is poor, adverse effects are caused on the conductivity and the tensile force of the battery piece, the reliability is seriously failed, and the production efficiency is reduced.

Therefore, based on the above requirements, the utility model provides a laminated tile battery piece with a hollow structure, which is different from a common hollow design in that a strip-shaped hollow design is adopted, so that the risk of bubbles caused by air pressure in the printing process of conductive adhesive possibly generated by high-density small hole design is reduced, the reliability performance of the battery piece is improved, and the production efficiency is improved; simultaneously, the contact area of the front area and the conductive adhesive can be further increased through the strip-shaped hollow design, so that the contact resistance is reduced, and the pulling force is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that the prior art hollow design proposed in the background technology is a high-density small hole design, and bubbles are generated in the subsequent conductive adhesive printing step, so that the contact effect of the conductive adhesive and a battery piece is poor, the conductive performance and the tensile force of the battery piece are adversely affected, the reliability is seriously lost, and the production efficiency is reduced; simultaneously, the contact area of the front area and the conductive adhesive can be further increased through the strip-shaped hollow design, so that the contact resistance is reduced, and the pulling force is improved.

In order to solve the technical problems, the utility model adopts the technical scheme that:

a laminated tile battery piece with a hollow structure comprises a plurality of main grids and auxiliary grids which are connected with each other, wherein a plurality of hollow points are distributed in a front area formed by connecting points of the main grids and the auxiliary grids which are connected with each other.

Furthermore, the shape of the hollow-out point is a strip shape.

Furthermore, the arrangement mode of each hollow-out point is parallel to each other.

Further, the spacing hollowed-out width between the hollowed-out points is 0.1 mm.

Further, the hollow depth of the hollow points is 8-12 um.

Further, the proportion of the hollow structure formed by the hollow points in the front area is 20%.

Compared with the prior art, the utility model has the advantages and positive effects that: the laminated tile battery piece with the hollow structure is different from the common hollow design in that a long strip-shaped hollow design is adopted, so that the risk of bubbles caused by air pressure in the printing process of conductive adhesive possibly generated by high-density small hole design is reduced, the reliability of the battery piece is improved, and the production efficiency is improved; simultaneously, the contact area of the front area and the conductive adhesive can be further increased through the strip-shaped hollow design, so that the contact resistance is reduced, and the pulling force is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of a laminated cell with a hollow structure according to an embodiment of the present invention;

fig. 2 is a schematic hollow design diagram of a laminated cell with a hollow structure according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Referring to fig. 1-2, an embodiment of the present invention provides a laminated cell with a hollow structure, including a plurality of interconnected main grids and auxiliary grids, and is characterized in that:

a plurality of hollow points are distributed in the front area formed by the connecting points of the main grid and the auxiliary grid.

Specifically, the shape of the hollow point is a strip. Specifically, the strip-shaped hollow design is adopted, so that the risk of bubbles caused by air pressure in the printing process of the conductive adhesive possibly generated by the high-density small hole design is reduced, the reliability of the battery piece is improved, and the production efficiency is improved; simultaneously, the contact area of the front area and the conductive adhesive can be further increased through the strip-shaped hollow design, so that the contact resistance is reduced, and the pulling force is improved.

Preferably, the arrangement mode of each hollow-out point is parallel to each other. Specifically, each hollowed-out point is arranged in parallel, so that the contact area of each hollowed-out point and the conductive adhesive is the same, no difference is generated, and the conductive adhesive printing process is prevented from being influenced due to the fact that the contact area is not uniform.

Preferably, the spacing of the hollow points is 0.1 mm. Specifically, the hollow width between each hollow point should not be too large, so as to avoid forming hollow gap.

Preferably, the hollowed-out depth of the hollowed-out points is 8-12 um.

Preferably, the proportion of the hollow structures formed by the hollow points in the front area is 20%.

Example 1

The utility model provides a laminated tile battery piece of hollow out construction, the front region that the tie point that main bars and auxiliary grid interconnect constitutes distributes and has a plurality of fretwork points, and the shape of fretwork point is rectangular shape, and the arrangement mode is mutual parallel arrangement, and the fretwork width of being separated by between each fretwork point is 0.1mm, and the fretwork degree of depth is 10um, and the hollow out construction that the hollow out point constitutes accounts for the proportion in front region and is 20%. When conducting conductive adhesive printing, compare with high-density type aperture design, the area of contact of frontal region and conductive adhesive increases, and the gassing reduces, uses the consumption of silver thick liquid to reduce, and manufacturing cost reduces, and production efficiency improves.

The utility model has the advantages and beneficial effects that:

1. the laminated tile battery piece with the hollow structure is different from the common hollow design in that a long strip-shaped hollow design is adopted, so that the risk of bubbles caused by air pressure in the printing process of conductive adhesive possibly generated by high-density small hole design is reduced, the reliability of the battery piece is improved, and the production efficiency is improved; simultaneously, the contact area of the front area and the conductive adhesive can be further increased through the strip-shaped hollow design, so that the contact resistance is reduced, and the pulling force is improved.

2. According to the laminated tile battery piece with the hollow structure, silver paste is not over-inked at the hollow position in the conductive adhesive printing process, so that the consumption of the front silver paste is saved, the consumption can reach 3-5mg, and the production cost of the battery piece is reduced.

3. According to the laminated cell piece with the hollow structure, due to the fact that the silver paste has ductility, after the laminated cell piece is hollow, due to the fact that the conductive adhesive needs to be printed during welding of the laminated assembly, the conductive adhesive is fluidic, certain extrusion force exists between the small pieces during lamination, the conductive adhesive can penetrate into the small hollow holes, and therefore the contact area of the conductive adhesive and the main grid is increased, the overall series resistance of the assembly is reduced, the power of the assembly is improved, and the power of the assembly can reach 1-1.5W. Meanwhile, the conducting resin at the hollow-out position is bonded more stably, the tension between the small strips is improved, and the reliability of the assembly is further improved.

4. According to the laminated tile battery piece with the hollow structure, the hollow design is adopted, air can be exhausted from two ends in the bonding process of the conductive adhesive, and the problem of abnormal bubbles after the conductive adhesive is bonded due to the airtight air pressure of the traditional high-density small hole design is solved, so that the failure risk of the battery piece is reduced.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the utility model and are not to be construed as limiting the utility model. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. The utility model provides a hollow out construction's stack tile battery piece, includes a plurality of interconnect's main bars and vice bars, its characterized in that:

a plurality of hollow points are distributed in the front area formed by the connecting points of the main grid and the auxiliary grid;

the shape of the hollow-out point is a strip;

the arrangement mode of the hollow points is parallel to each other;

the spacing hollowed-out width between the hollowed-out points is 0.1 mm;

the hollow depth of the hollow points is 8-12 um;

the proportion of the hollow structure formed by the hollow points in the front area is 20%.