CN213752732U

CN213752732U - Busbar and photovoltaic module

Info

Publication number: CN213752732U
Application number: CN202022917755.1U
Authority: CN
Inventors: 丁佳伟; 焦方凯; 刘振阳; 申盼
Original assignee: Taizhou Lerri Solar Technology Co Ltd
Current assignee: Taizhou Longi Solar Technology Co Ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-07-20
Anticipated expiration: 2030-12-08

Abstract

The application discloses busbar and photovoltaic module, the busbar includes: the welding structure comprises a conductive body, an insulating layer and a welding piece, wherein the insulating layer is arranged on the surface of the conductive body and is provided with a connecting hole; the welding piece is located in the connecting hole and is in conductive connection with the conductive body. The insulating layer is arranged on the conductive body, the conductive body is in conductive connection with the welding strip, and the color of the insulating layer is the same as at least one of the color of the welding strip and the color of the battery piece, so that the appearance color of the photovoltaic module is reduced to at most two colors, the glare problem of the photovoltaic module is inhibited, and the appearance aesthetic feeling of the photovoltaic module is improved.

Description

Busbar and photovoltaic module

Technical Field

The application relates to the technical field of solar cells, in particular to a bus bar and a photovoltaic module.

Background

The photovoltaic module comprises a cell, a punching welding strip and a bus bar. The punching welding strip is used for connecting two adjacent battery pieces, the bus bar is connected with the punching welding strip, and the bus bar is located below the battery pieces and the punching welding strip.

Because the cell pieces and the punched welding strips are black and the bus bars are silvery white, the photovoltaic module is easy to cause the problem of glare.

SUMMERY OF THE UTILITY MODEL

Therefore, the present invention provides a bus bar and a photovoltaic module, which at least partially solve the above-mentioned problems.

The utility model provides a bus bar, bus bar includes:

a conductive body;

the insulating layer is arranged on the surface of the conductive body and provided with a connecting hole;

and the welding piece is positioned in the connecting hole and is in conductive connection with the conductive body.

Most preferably, the electrically conductive body is a flexible member.

As an achievable optimum, the weld is deposited on the connection hole.

And as an achievable optimal mode, the welding piece is embedded and matched with the connecting hole.

As an implementable optimum, the weld protrudes from the connection hole.

And the welding parts are arranged in an optimal mode, the insulating layer comprises a plurality of connecting holes, and each connecting hole corresponds to one welding part.

As an achievable optimum, the connection holes are arranged at equal intervals along the length direction of the insulating layer.

The utility model also provides a photovoltaic module, photovoltaic module includes above-mentioned arbitrary the busbar.

As an achievable optimal mode, the solar cell module further comprises a welding strip and a cell slice, wherein the cell slice and the welding strip are positioned on the insulating layer; two adjacent battery pieces are connected through the welding strip, the welding strip is connected with the welding piece of the bus bar, and the color of the insulating layer of the bus bar is the same as that of at least one of the battery pieces and the welding strip.

And as an optimal mode which can be realized, the battery piece and the welding strip have the same color.

In the embodiment, the insulating layer is arranged on the conductive body, the conductive body is in conductive connection with the welding strip, and the color of the insulating layer is the same as at least one of the welding strip and the battery piece, so that the appearance color of the photovoltaic module is reduced to at most two colors, the glare problem of the photovoltaic module is inhibited, and the appearance aesthetic feeling of the photovoltaic module is improved; when the battery piece is subjected to external pressure, the conductive body can buffer the battery piece due to the plasticity of the conductive body, so that the battery piece is prevented from being hidden or damaged; the welding part is in embedded fit with the connecting hole, so that the contact area of the welding part and the welding strip is maximized, and the stability of the connection of the bus bar and the welding strip is improved; a plurality of welding piece is located between solder strip and the busbar, further improves busbar and solder strip joint strength.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural view of a photovoltaic module according to an embodiment of the present application;

FIG. 2 is a partial sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural view of a bus bar according to an embodiment of the present application;

fig. 4 is a sectional view taken along line B-B of fig. 3.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. It should be noted that, for the convenience of description, only the portions relevant to the application are shown in the drawings.

In the description of the present application, it is to be understood that the terms "radial," axial, "" upper "inner," "outer," and the like refer to an orientation or positional relationship based on that shown in the drawings, which is for convenience in describing the present application and simplifying the description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "disposed" and "connected" are to be understood in a broad sense, e.g. either fixedly or detachably or integrally connected: may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

Fig. 1 shows a schematic structural diagram of a photovoltaic module, and fig. 2 shows a partial sectional view of the photovoltaic module in the direction a-a.

The photovoltaic module comprises a bus bar 30, a solder strip 20 and a plurality of battery pieces 10, wherein the solder strip 20 is used for connecting two adjacent battery pieces 10. The bus bar 30 is used for collecting the electric energy converted by the cell 10, and the solder strip 20 is connected to the bus bar 30.

The bus bar 30 includes a conductive body 31, an insulating layer 33, and a solder 32. The insulating layer 33 is disposed on the surface of the conductive body 31, a connection hole 321 is disposed on the insulating layer 33, the solder 32 is disposed on the connection hole 321, and the solder 32 is electrically connected to the conductive body 31. The insulating layers 33 may be disposed on one surface or both surfaces of the conductive body 31, and if the insulating layers 33 are disposed on both surfaces of the conductive body 31, one of the insulating layers 33 is selected to be opened with the connection hole 321, and the other insulating layer 33 is not opened with the connection hole 321. The color of the insulating layer 33 may be the same as that of the solder ribbon 20, or the color of the insulating layer 33 may be the same as that of the battery cell 10.

As shown in fig. 2, two adjacent battery plates 10 are spaced apart and located at different heights, a welding strip 20 is located between the two battery plates 10, and the welding strip 20 connects the two battery plates 10. The bus bar 30 is positioned below the battery piece 10 and the solder strip 20, and the welding part 32 of the bus bar 30 is connected with the solder strip 20, so that the bus bar 30 is electrically connected with the solder strip 20, and the electric energy converted by the battery piece 10 can be conducted to the bus bar 30. In addition, the color of the insulating layer 33 is the same as at least one of the solder strip 20 and the battery piece 10, so that the appearance color of the photovoltaic module is reduced to at most two colors, the glare problem of the photovoltaic module is inhibited, and the aesthetic feeling of the appearance of the photovoltaic module is improved.

In a preferred embodiment, the battery piece 10 is the same color as the solder strip 20.

Referring to fig. 1 and 2, in the present embodiment, the photovoltaic module includes a bus bar 30, a solder ribbon 20, and a plurality of cells 10. Two adjacent battery pieces 10 are arranged at intervals and are located at different heights, the welding strip 20 is located between the two battery pieces 10, and the welding strip 20 connects the two battery pieces 10. The bus bar 30 is positioned under the battery plate 10 and the solder strip 20, the solder part 32 of the bus bar 30 is connected with the solder strip 20,

the color of the cell piece 10 is black, the color of the welding strip 20 is black, the color of the bus bar 30 is also black, and the colors of the three are the same, so that the appearance color of the photovoltaic module is reduced to one, the problem of glare of the photovoltaic module is thoroughly solved, and the appearance aesthetic feeling of the photovoltaic module is further improved.

In a preferred embodiment, the conductive body 31 is a flexible member.

In the present embodiment, the conductive body 31 may be a gold foil, a silver foil, a copper foil, or the like, which has good plasticity and conductivity. The battery sheet 10 is made of a silicon material, and has high hardness and high brittleness. The cell 10 is placed on the conductive body 31, when the cell 10 is under external pressure, the conductive body 31 can buffer the cell 10 due to the plasticity of the conductive body, so that the cell 10 is prevented from being hidden or damaged, and the structural strength of the photovoltaic module is improved.

In a preferred embodiment, the weldment 32 is deposited onto the attachment holes 321.

Referring to fig. 3 and 4, in the present embodiment, the bus bar 30 includes a conductive body 31, an insulating layer 33, and a solder 32. The conductive body 31 may be gold foil, silver foil, copper foil, or the like; the material of the insulating layer 33 may be polyimide, polyethylene terephthalate, polybutylene terephthalate, polyarylate, or the like; the solder 32 may be tin or tin-lead alloy, etc.

The insulating layer 33 is disposed on the surface of the conductive body 31, a connection hole 321 is disposed on the insulating layer 33, the solder 32 is disposed on the connection hole 321, and the solder 32 is electrically connected to the conductive body 31. Considering that the conductive body 31 has good conductivity and poor welding performance, and the welding member 32 has good welding performance, it is difficult to weld the conductive body 31 and the welding member 32. The present embodiment employs electroplating or electroless plating to connect the solder 32 and the conductive body 31, so that the two are firmly connected together.

In some preferred embodiments, the welding member 32 is insert-fitted with the connection hole 321.

Referring to fig. 3 and 4, in the present embodiment, the bus bar 30 includes a conductive body 31, an insulating layer 33, and a solder 32. The insulating layer 33 is provided on the surface of the conductive body 31, and a connection hole 321 is provided in the insulating layer 33, and the solder 32 is located in the connection hole 321. For example, the cross section of the connecting hole 321 is circular, the welding member 32 is cylindrical, and the diameter of the connecting hole 321 is equal to that of the welding member 32, so that the welding member 32 can be embedded in the space; or, the cross section of the connecting hole 321 is rectangular, the welding member 32 is quadrangular, the long side of the connecting hole 321 is equal to the length of the welding member 32, and the short side of the connecting hole 321 is equal to the width of the welding member 32, so that the welding member 32 can be embedded in the space.

The welding part 32 is matched with the connecting hole 321 in an embedding manner, so that the contact area of the welding part 32 and the welding strip 20 is maximized, and the stability of connection of the bus bar 30 and the welding strip 20 is improved.

Further, the welding members 32 protrude from the connecting holes 321.

Referring to fig. 3 and 4, in the present embodiment, the height of the welding member 32 is greater than the depth of the connection hole 321, so that the welding member 32 protrudes from the connection hole 321. When the bus bar 30 is welded to the welding strip 20, the part of the welding part 32 protruding from the connecting hole 321 is beneficial to welding with the welding strip 20, so that a good welding seam is formed between the welding part 32 and the welding strip 20, and the welding quality of the two is ensured.

Referring to fig. 1-4, in some preferred embodiments, the bus bar 30 includes several weldments 32. The insulating layer 33 includes a plurality of connection holes 321, the connection holes 321 are arranged along a length direction of the insulating layer 33, and each connection hole 321 corresponds to one solder part 32. When the bus bar 30 is welded with the welding strip 20, the welding parts 32 are positioned between the welding strip 20 and the bus bar 30, so that the connection strength of the bus bar 30 and the welding strip 20 is further improved, and the stable connection of the bus bar 30 and the welding strip 20 is ensured.

Further, the connection holes 321 are arranged at equal intervals along the length direction of the insulating layer 33.

The insulating layer 33 includes a plurality of connection holes 321, the connection holes 321 are arranged at equal intervals along the length direction of the insulating layer 33, and each connection hole 321 corresponds to one solder part 32. Between the solder strip 20 and the bus bar 30, the welding parts 32 are arranged at equal intervals along the length direction of the solder strip 20 or the bus bar 30, so that the connecting acting force of the solder strip 20 and the bus bar 30 is equal everywhere, the local connection acting force is prevented from being too large, and the connection stability of the bus bar 30 and the solder strip 20 is improved.

The above embodiments are merely illustrative of the technical solutions of the application and not restrictive, and although the present application is described in detail with reference to the embodiments, those of ordinary skill in the art should understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bus bar, comprising:

a conductive body;

2. The bus bar of claim 1, wherein the conductive body is a flexible member.

3. The bus bar of claim 1, wherein the weld is deposited on the connection hole.

4. The bus bar of claim 1, wherein the weldment is insert-fitted with the connection hole.

5. The bus bar of claim 4, wherein the weldment protrudes from the connection hole.

6. The bus bar of claim 1, comprising a plurality of the solder members, wherein the insulating layer comprises a plurality of the connection holes, one for each of the solder members.

7. The bus bar according to claim 6, wherein the connection holes are arranged at equal intervals in a length direction of the insulating layer.

8. A photovoltaic module comprising the bus bar according to any one of claims 1 to 7.

9. The photovoltaic module of claim 8, further comprising a solder ribbon and a cell sheet, the cell sheet and the solder ribbon being located on the insulating layer; two adjacent battery pieces are connected through the welding strip, the welding strip is connected with the welding piece of the bus bar, and the color of the insulating layer of the bus bar is the same as that of at least one of the battery pieces and the welding strip.

10. The photovoltaic module of claim 9, wherein the cell pieces and the solder ribbon are the same color.