CN216015387U

CN216015387U - Photovoltaic module

Info

Publication number: CN216015387U
Application number: CN202122071261.0U
Authority: CN
Inventors: 赵亚婷; 邓士锋; 卢国伟; 刘衿因; 杨智; 许涛
Original assignee: CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc; Atlas Sunshine Power Group Co Ltd
Current assignee: CSI Cells Co Ltd; Canadian Solar Inc; Canadian Solar Manufacturing Changshu Inc
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-03-11
Anticipated expiration: 2031-08-30

Abstract

The utility model provides a photovoltaic module, which comprises an upper packaging glass, a transparent adhesive film, a solar cell panel, a color adhesive film and a lower packaging glass which are sequentially stacked, wherein the solar cell panel comprises a plurality of cell groups and a bus bar for leading out the current in the cell groups; the thickness of the position, corresponding to the bus bar, of the solar panel is not more than that of the color adhesive film; when the upper packaging glass, the transparent adhesive film, the solar cell panel, the colored adhesive film and the lower packaging glass are subjected to laminating treatment through a laminating process, the solder strip cannot penetrate through the colored adhesive film, so that a user cannot see the solder strip from the back of the photovoltaic module, the appearance effect of the finally formed photovoltaic module is enhanced, and the insulation effect of the photovoltaic module is enhanced.

Description

Photovoltaic module

Technical Field

The utility model relates to a photovoltaic power generation field especially relates to a photovoltaic module.

Background

Sunlight electric energy is clean, pollution-free and available energy, and is inexhaustible. In the present day of the gradual shortage of fossil energy, the selection of solar photovoltaic energy as an alternative energy is one of the important ways to solve the energy crisis.

Solar cells are devices that convert solar energy into electrical energy using the photovoltaic effect. With the development of solar cell technology and the demand of the market, the demand for high power is high. The existing industry attracts much attention by a heterojunction HJT technology, and a silicon-based heterojunction solar cell with an intrinsic layer can ensure high conversion efficiency, reduce the thickness of a silicon wafer to 100 mu m, effectively reduce the consumption of silicon materials and reduce the cost.

Based on the problem that the silicon-based heterojunction solar cell panel is not resistant to water vapor, a double-glass packaging method is generally adopted, a ground power station is generally in a double-sided mode, transparent EVA is adopted on the front side and the back side of the silicon-based heterojunction solar cell panel, and the power generation capacity of the back side of a formed photovoltaic module can be effectively utilized. However, for some roof assemblies, the back of the photovoltaic assembly has no power generation requirement, and the back can use a colored adhesive film and adopt a double-glass single-side packaging mode.

However, the diameter of the circular solder strip used in the photovoltaic module is generally 0.32-0.35 mm, and the thickness of the bus bar is 0.2-0.4 mm. The thickness of the current back color film is generally 0.55-0.65 mm. The thickness that photovoltaic module head and the tail and middle busbar add the solder strip is about 0.52 ~ 0.75mm, simultaneously, will weld the in-process soldering tin of taking to weld on the busbar and have some to pile up, lead to on the heterojunction solar cell panel with the thickness of the corresponding position department of busbar to increase slightly, about 0.57mm ~ 0.8mm, exceeded the thickness of colored glued membrane. Simultaneously, be line contact between circular solder strip and the colored glued membrane, when the lamination, the contact site pressure of colored glued membrane and circular solder strip increases, easily leads to the colored glued membrane damaged to the solder strip crosses colored glued membrane direct and encapsulates the glass contact down after the lamination, can have outward appearance and insulating problem.

In view of the above, there is a need to provide a new photovoltaic module to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photovoltaic module to the photovoltaic module of two glass single faces, can effectively improve photovoltaic module's outward appearance problem, and improve photovoltaic module's insulating properties.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a photovoltaic module comprises upper packaging glass, a transparent adhesive film, a solar panel, a colored adhesive film and lower packaging glass which are sequentially stacked, wherein the solar panel comprises a plurality of cell groups and a bus bar for leading out current in the cell groups; the thickness of the solar panel at the position corresponding to the bus bar is not more than that of the color adhesive film.

As a further improved technical solution of the present invention, the thickness of the position where the solar cell panel corresponds to the bus bar is 0.35mm to 0.65 mm.

As the utility model discloses further modified technical scheme, solar cell panel is still including connecting the battery piece group with the solder strip of busbar, solder strip have with busbar looks welded weld part, solar cell panel with the thickness of the corresponding position department of busbar does the lower extreme of weld part is apart from the distance of the upper end of busbar.

As a further improved technical solution of the present invention, the lower surface of the welding portion is a plane.

As a further improved technical scheme of the utility model, the cross-section of weld part is the platykurtic.

As a further improved technical proposal of the utility model, the thickness of the welding part is 0.1mm ~ 0.2 mm.

As a further improved technical scheme of the utility model, the solder strip still has and is located the busbar with connecting portion between the battery piece group, connecting portion with the weld part is connected, just the sectional area of connecting portion with the sectional area of weld part is the same.

As a further improved technical scheme of the utility model, the cross-section of connecting portion is circular.

As a further improved technical scheme of the utility model, the colored glued membrane is white EVA membrane.

As the utility model discloses further modified technical scheme, transparent adhesive film is transparent EVA membrane or transparent POE membrane or transparent EPE membrane.

The utility model has the advantages that: the utility model provides a photovoltaic module, through making solar cell panel with the thickness of the corresponding position department of busbar is not more than the thickness of colored glued membrane is carrying out the lamination through lamination technology to last encapsulation glass, transparent adhesive film, solar cell panel, colored glued membrane, lower encapsulation glass and is handled, the solder strip can't run through colored glued membrane, thereby the user certainly photovoltaic module's the back can not be seen the solder strip, the reinforcing finally forms photovoltaic module's outward appearance effect, and reinforcing photovoltaic module's insulating effect.

Drawings

Fig. 1 is a schematic structural diagram of a photovoltaic module according to the present invention;

FIG. 2 is a schematic diagram of a solar panel of the photovoltaic module of FIG. 1;

FIG. 3 is an enlarged view taken at A in FIG. 2;

fig. 4 is a schematic structural view of a cell stack in fig. 2;

FIG. 5 is an enlarged view at B in FIG. 4;

fig. 6 is a cross-sectional view of the welding portion according to an embodiment of the present invention.

Wherein: 100. a photovoltaic module; 1. upper packaging glass; 2. a transparent adhesive film; 3. a solar panel; 31. a battery piece group; 31a, a first cell stack; 31b, a second cell stack; 31c, a third cell stack; 31d, a third cell stack; 311. a battery piece; 32. a bus bar; 33. welding a strip; 331. welding the part; 332. a connecting portion; 4. a colored glue film; 5. and a lower encapsulation glass.

Detailed Description

The present invention will be described in detail with reference to the embodiments shown in the drawings, and fig. 1 to 6 show the preferred embodiments of the present invention. It should be noted that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the equivalent transformation or substitution of the function, method, or structure based on these embodiments is within the protection scope of the present invention.

Terms such as "upper," "above," "lower," "below," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the photovoltaic assembly in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The photovoltaic assembly may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1, the present invention provides a photovoltaic module 100, which includes an upper package glass 1, a transparent adhesive film 2, a solar panel 3, a color adhesive film 4, and a lower package glass 5 stacked in sequence. The upper packaging glass 1 is connected with the front surface of the solar panel 3 through the transparent adhesive film 2, and the back surface of the solar panel 3 is connected with the lower packaging glass 5 through the colored adhesive film 4.

The utility model discloses in, with solar cell panel 3 specifically explains for the example heterojunction solar cell panel 3, certainly, does not use this as the limit. It can be understood that the technical solution of the present invention can also be applied to solar panels 3 of other structures.

As shown in fig. 2, the solar cell panel 3 includes a plurality of cell groups 31, and a bus bar 32 for guiding out a current in the cell groups 31.

As shown in fig. 4, each of the cell groups 31 includes a plurality of cell sheets 311 connected in sequence by solder strips. That is, two adjacent battery sheets 311 in each battery sheet group 31 are electrically connected by a welding strip.

Specifically, the plurality of cell groups 31 include a cell group as a positive electrode output and a cell group as a negative electrode output. And the cell groups as the positive electrode output and the cell groups as the negative electrode output are sequentially and alternately arranged.

In the present embodiment, the cell groups to be the positive electrode output and the cell groups to be the negative electrode output are alternately arranged in sequence. Of course, this is not a limitation, and in other embodiments, the cell groups for positive output and the cell groups for negative output may be alternately arranged in sequence.

In one embodiment, the cell set as the positive electrode output includes two cell sets, which are respectively expressed as: first cell group 31a and second cell group 31b, and first cell group 31a and second cell group 31b are symmetrically disposed by bus bar 32, and are electrically connected by bus bar 32. Similarly, the battery piece group as the negative output includes two, which are respectively recorded as: third cell group 31c and fourth cell group 31d, and third cell group 31c and fourth cell group 31d are symmetrically disposed with bus bar 32, and are electrically connected by bus bar 32. The ends of the adjacent cell groups as the positive electrode output and the negative electrode output, which are located on the same side, are electrically connected through a bus bar 32. Of course, this is not a limitation.

Specifically, as shown in fig. 3, the cell group 31 and the bus bar 32 are electrically connected by a solder strip 33, and the solder strip 33 is soldered to the lower side of the bus bar 32 to enhance the appearance of the photovoltaic module 100.

Further, the thickness of the solar cell panel 3 at the position corresponding to the bus bar 32 is not greater than the thickness of the color adhesive film 4, so that when the upper package glass 1, the transparent adhesive film 2, the solar cell panel 3, the color adhesive film 4 and the lower package glass 5 are laminated through a laminating process, the solder strip 33 at the position corresponding to the bus bar 32 cannot penetrate through the color adhesive film 4, so that a user cannot see the solder strip 33 from the back of the photovoltaic module 100, the appearance effect of the finally formed photovoltaic module 100 is enhanced, and the insulation effect of the photovoltaic module 100 is enhanced.

Further, the solder ribbon 33 connecting the cell group 31 and the bus bar 32 has a solder portion 331 soldered to the bus bar 32, and the thickness of the solar cell panel 3 at the position corresponding to the bus bar 32 is the distance from the lower end of the solder portion 331 to the upper end of the bus bar 32.

It is understood that, when the connection between the soldering part 331 and the bus bar 32 is achieved by thermally melting the soldering part 331, the thickness of the solar cell panel 3 at the position corresponding to the bus bar 32 is slightly smaller than the sum of the thickness of the soldering part 331 and the thickness of the bus bar 32. When the soldering portion 331 and the bus bar 32 are connected by the hot-melted solder, the thickness of the solar cell panel 3 at the position corresponding to the bus bar 32 is the sum of the thickness of the soldering portion 331, the thickness of the solder deposited and solidified, and the thickness of the bus bar 32.

Further, the thickness of the solar cell panel 3 at the position corresponding to the bus bar 32 is 0.35mm to 0.65mm, and the thickness of the current back color adhesive film 4 is generally 0.55mm to 0.65mm, so that when the upper package glass 1, the transparent adhesive film 2, the solar cell panel 3, the color adhesive film 4, and the lower package glass 5 are laminated through a lamination process, the solder strip 33 cannot penetrate through the color adhesive film 4, so that a user cannot see the solder strip 33 from the back of the photovoltaic module 100, the appearance effect of the finally formed photovoltaic module 100 is enhanced, and the insulation effect of the photovoltaic module 100 is enhanced.

Further, the thickness of the welding portion 331 is 0.1mm to 0.2mm, that is, the thickness of the solar cell panel 3 at the position corresponding to the bus bar 32 is reduced by reducing the thickness of the welding portion 331, so that the thickness of the solar cell panel 3 at the position corresponding to the bus bar 32 is not greater than the thickness of the color adhesive film 4.

Further, as shown in fig. 3 and 5, the lower surface of the welding portion 331 is a plane, that is, before the upper sealing glass 1, the transparent adhesive film 2, the solar panel 3, the color adhesive film 4 and the lower sealing glass 5 are laminated through the laminating process, the side of the welding portion 331 contacting the color adhesive film 4 is a plane, and the contact area between the welding portion 331 and the color adhesive film 4 is increased, so that the pressure of the welding portion 331 on the color adhesive film 4 during the laminating process is reduced, and the welding portion 331 is further prevented from penetrating through the color adhesive film 4.

Referring to fig. 6, in one embodiment, the welding portion 331 has a flat cross-section, and the welding portion 331 can be pressed flat by using a tool to press. Of course, this is not a limitation.

Further, the welding strip 33 further has a connecting portion 332 located between the bus bar 32 and the cell group 31, the connecting portion 332 is connected to the welding portion 331, and the cross-sectional area of the connecting portion 332 is the same as that of the welding portion 331, so that the cross-sectional area of the welding portion 331 is not changed, that is, the power is not affected on the basis of reducing the thickness of the welding portion 331.

In one embodiment, the connecting portion 332 has a circular cross-section. Of course, this is not a limitation.

In a specific embodiment, the color adhesive film 4 is a white EVA film, which has a high reflectivity and can effectively increase the power of the front side of the photovoltaic module 100.

Further, the transparent adhesive film 2 is a transparent EVA film, a transparent POE film, or a transparent EPE film. Of course, this is not a limitation.

Furthermore, the thicknesses of the upper packaging glass 1 and the lower packaging glass 5 are both 1.6 mm-2.0 mm. The upper sealing glass 1 and the lower sealing glass 5 may be patterned glass or float glass.

To sum up, the utility model provides a photovoltaic module 100, through making solar cell panel 3 with the thickness of the corresponding position department of busbar 32 is not more than during the lamination treatment is carried out to last encapsulation glass 1, cellophane membrane 2, solar cell panel 3, colored glued membrane 4, lower encapsulation glass 5 through lamination process to the thickness of colored glued membrane 4, with the solder strip 33 of the corresponding position department of busbar 32 can't run through colored glued membrane 4, thereby the user certainly photovoltaic module 100's the back can not be seen solder strip 33, the reinforcing finally forms photovoltaic module 100's outward appearance effect, and reinforcing photovoltaic module 100's insulating effect.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A photovoltaic module comprises upper packaging glass, a transparent adhesive film, a solar panel, a colored adhesive film and lower packaging glass which are sequentially stacked, wherein the solar panel comprises a plurality of cell groups and a bus bar for leading out current in the cell groups; the method is characterized in that: the thickness of the solar panel at the position corresponding to the bus bar is not more than that of the color adhesive film.

2. The photovoltaic module of claim 1, wherein: the thickness of the solar cell panel at the position corresponding to the bus bar is 0.35 mm-0.65 mm.

3. The photovoltaic module of claim 1, wherein: the solar cell panel further comprises a welding strip for connecting the cell group with the bus bar, the welding strip is provided with a welding part welded with the bus bar, and the thickness of the position of the solar cell panel corresponding to the bus bar is the distance between the lower end of the welding part and the upper end of the bus bar.

4. The photovoltaic module of claim 3, wherein: the lower surface of the welding part is a plane.

5. The photovoltaic module of claim 3, wherein: the cross section of the welding part is flat.

6. The photovoltaic module of claim 3, wherein: the thickness of the welding part is 0.1 mm-0.2 mm.

7. The photovoltaic module of any one of claims 3-6, wherein: the welding strip is provided with a bus bar and a connecting part between the battery piece groups, the connecting part is connected with the welding part, and the sectional area of the connecting part is the same as that of the welding part.

8. The photovoltaic module of claim 7, wherein: the cross section of the connecting part is circular.

9. The photovoltaic module of claim 1, wherein: the colored glue film is a white EVA film.

10. The photovoltaic module of claim 1, wherein: the transparent adhesive film is a transparent EVA film, a transparent POE film or a transparent EPE film.