CN219371046U

CN219371046U - Back plate glass and double-glass assembly with same

Info

Publication number: CN219371046U
Application number: CN202223523153.3U
Authority: CN
Inventors: 王全志; 尉元杰
Original assignee: Canadian Solar Manufacturing Changshu Inc; Atlas Sunshine Power Group Co Ltd
Current assignee: Canadian Solar Inc; Canadian Solar Manufacturing Changshu Inc
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-07-18
Anticipated expiration: 2032-12-27

Abstract

The utility model discloses back plate glass and a double-glass assembly with the same, wherein the back plate glass is used for the double-glass assembly, a lead hole and a stress dispersing structure are arranged in the middle area of the back plate glass, and the stress dispersing structure is positioned on two sides of the lead hole along the length direction of the back plate glass. According to the utility model, the dispersing structures are arranged on the two sides of the lead holes along the length direction of the back plate glass, so that stress born by the corresponding positions can be dispersed by the stress dispersing structures, and compared with the prior art, the probability of cracking of the back plate glass at the positions of the lead holes can be effectively reduced, and the stability of the double-glass assembly is further improved.

Description

Back plate glass and double-glass assembly with same

Technical Field

The utility model relates to the field of photovoltaics, in particular to back plate glass and a double-glass assembly with the same.

Background

The glass is used as an inorganic material, has excellent properties of good impact resistance, weather resistance, ultraviolet resistance, sand and dust resistance, salt fog resistance and the like, and can greatly reduce attenuation and failure of components caused by aging. The development of a double-glass assembly formed by clamping two back plate glass with solar cells is rapid in recent years, and along with the requirements of ultra-long, ultra-wide and ultra-thin client assemblies, the ultra-thin double-glass assembly product meets a new subject: and the mechanical load of the assembly is invalid, namely, the situation that glass breakage occurs in an airborne test of the assembly due to low strength of back plate glass and cover plate glass used by the double-glass assembly.

The current of the solar cell needs to be led out from the back of the assembly, and a lead hole for leading out the bus bar to be connected to the junction box needs to be arranged in the middle area of the back plate glass serving as back plate glass, so that a load failure point is easy to form at a position corresponding to the lead hole, and the probability of cracking of the back plate glass at the position is high.

In view of the foregoing, there is a need for an improved back sheet glass and dual glass assembly having the same that solves the above-mentioned problems.

Disclosure of Invention

In order to achieve the aim of the utility model, the utility model provides back plate glass and a double-glass assembly with the same.

In order to solve one of the technical problems, the following technical scheme is adopted:

the utility model provides a backplate glass for two glass components, backplate glass's middle zone is provided with the lead wire hole, backplate glass still includes stress dispersion structure, stress dispersion structure is located the lead wire hole is along backplate glass length direction's both sides.

Further, the stress dispersion structure includes an inner bump protruding from an inner wall of the lead hole toward an inside of the lead hole.

Further, the lead hole is a circular hole, and the relationship between the protruding length d1 of the inner bump in the radial direction of the lead hole and the thickness H of the back plate glass is: d1 is less than or equal to 1/2H and less than or equal to 2H.

Further, the thickness of the inner bump is the same as that of the back plate glass.

Further, the length L1 of the inner bump in the circumferential direction of the lead hole is related to the circumference C of the lead hole as follows: l1 is more than or equal to 1/8C and less than or equal to 1/4C.

Further, the stress dispersing structure further comprises a back bump protruding from the back surface of the back plate glass towards the back direction, and the back bump is arranged adjacent to the edge of the lead hole.

Further, the relationship between the protruding height H2 of the back bump in the back direction and the thickness H of the back plate glass is: h2 is more than or equal to 1/4H and less than or equal to 1/2H.

Further, the lead hole is a circular hole, and the relation between the width d2 of the back bump in the radial direction of the lead hole and the thickness H of the back plate glass is that 1/2H is less than or equal to d2 and less than or equal to 2H.

Further, the length L2 of the side edge of the back bump adjacent to the lead hole edge in the circumferential direction of the lead hole is in relation to the circumference C of the lead hole: l2 is more than or equal to 1/8 and less than or equal to 1/4.

The double-glass assembly comprises a solar cell and back plate glass arranged on the back side of the solar cell, wherein the structure of the back plate glass is as described above.

The beneficial effects of the utility model are as follows: according to the utility model, the dispersing structures are arranged on the two sides of the lead holes along the length direction of the back plate glass, so that stress born by the corresponding positions can be dispersed by the stress dispersing structures, and compared with the prior art, the probability of cracking of the back plate glass at the positions of the lead holes can be effectively reduced, and the stability of the double-glass assembly is further improved.

Drawings

FIG. 1 is a schematic plan view of a prior art back plate glass;

FIG. 2 is a schematic view of an embodiment of the back plate glass of the present utility model;

FIG. 3 is an enlarged schematic view of portion a of FIG. 2;

FIG. 4 is a schematic view of a portion of the structure of FIG. 3 taken along the line A-A';

FIG. 5 is a schematic view of another embodiment of the back plate glass of the present utility model;

FIG. 6 is an enlarged schematic view of section b of FIG. 5;

FIG. 7 is a schematic view of a portion of the structure of FIG. 5 taken along the line B-B';

FIG. 8 is a schematic view of an embodiment of a dual-glass assembly of the present utility model;

the back plate comprises 100-back plate glass, 11-long sides, 12-short sides, 10-lead holes, 101-inner bumps and 102-back bumps; 200-cover glass, 300-solar cell, 41-lower adhesive film and 42-upper adhesive film.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The inventors found that: for a dual-glass assembly, the lead hole on the back-sheet glass is one of the main locations of stress concentration under load, and thus cracking is prone to occur. Specifically, as shown in fig. 1, a back glass 100' having a substantially rectangular shape has a pair of long sides 11' and a pair of short sides 12', and is provided with lead holes 10' in its inner region, and the number of the lead holes 10' is usually three (only one is shown in the figure), and when a load is applied, the lead holes 10' are liable to cause a problem of stress concentration at both ends in the extending direction of the long sides 11', resulting in a fracture phenomenon, which becomes a load failure point.

Referring to fig. 2 to 7, a back sheet glass 100 according to a preferred embodiment of the present utility model is used as a back sheet for a dual glass assembly, the back sheet glass 100 includes a lead hole 10 located in a middle region, and stress dispersing structures located at both sides of the lead hole 10 along a length direction of the back sheet glass, and dispersing stress at the lead hole 10, thereby reducing a risk of breakage of the glass at the lead hole 10.

The shape of the back plate glass 100 is adjusted according to the overall shape of the typeset battery pieces, the back plate glass 100 currently in main stream is rectangular, and is provided with a pair of long sides 11 which are oppositely arranged and a pair of short sides 12 which are oppositely arranged, and the extending direction of the long sides 11 is the length direction of the back plate glass 100.

When a photovoltaic module is loaded, stress received by the back sheet glass 100 as a back sheet at positions of both ends of the lead holes 10 parallel to the long sides 11 is dispersed by the stress dispersing structure; compared with the prior art, the stress concentration degree can be greatly reduced, the probability of cracking of the back plate glass 100 at the position of the lead hole 10 can be effectively reduced, and the stability of the double-glass assembly is further improved.

Referring to fig. 2 to 4, in one embodiment, the stress dispersing structure includes an inner bump 101 protruding from the inner wall of the lead hole 10 toward the inside of the lead hole 10.

As shown in the drawing, the lead hole 10 is a circular hole, and preferably, the protruding length d1 of the inner bump 101 in the radial direction of the lead hole 10 is as follows: d1 is less than or equal to 1/2H and less than or equal to 2H.

In this embodiment, the thickness H of the back plate glass is about 1.6mm to 2mm, and in this case, the protruding length d1 of the inner bump 101 may be limited to 1mm to 3mm.

Further, the inner bump 101 has the same thickness as the back plate glass 100. As shown in fig. 4, the thickness H1 of the inner bump 101 in the direction perpendicular to the back plate glass 100 is equal to the thickness H of the back plate glass 100; the preparation is convenient. Of course, in other embodiments, the thickness H1 of the inner bump 101 may be smaller or larger than the thickness H of the back plate glass 100, but the front surface of the inner bump 101 cannot exceed the front surface of the back plate glass 100, so as not to affect the battery cells.

In addition, the relationship between the length L1 of the inner bump 101 in the circumferential direction of the lead hole 10 and the circumferential length C of the lead hole 10 is: l1 is more than or equal to 1/8C and less than or equal to 1/4C. The relation between the radius r and the perimeter C of the lead hole 10 is c=2×pi×r, and the radius r of the lead hole 10 is generally set in the range of 4mm to 6mm, and in a specific implementation, the radius r of the lead hole 10 may be set to 5mm, for example.

Referring to fig. 5 to 7, which are schematic diagrams of the back surface of the back plate glass 100, the stress dispersing structure includes back bumps 102 protruding from the back surface of the back plate glass 100 toward the back direction, and the inner bumps 101 are adjacent to two side edges of the lead holes 10 along the length direction of the back plate glass 100.

Specifically, as shown in the figure, the relationship between the protruding height H2 of the back bump 102 in the back direction and the thickness H of the back plate glass 100 is: h2 is more than or equal to 1/4H and less than or equal to 1/2H.

Further, the lead hole 10 is a circular hole, and the relation between the width d2 of the back bump in the radial direction of the lead hole 10 and the thickness H of the back plate glass is that 1/2H is less than or equal to d2 and less than or equal to 2H. In this embodiment, the thickness H of the back plate glass is about 1.6mm to 2mm, and in this case, the range of the width d2 of the back bump in the radial direction of the lead hole 10 may be limited to 1mm to 3mm.

In addition, the back bump 102 abuts against the side edge of the lead hole 10, and the length L2 in the circumferential direction of the lead hole is related to the circumference C of the lead hole 10 as follows: l2 is more than or equal to 1/8 and less than or equal to 1/4. The relation between the radius r and the perimeter C of the lead hole 10 is c=2×pi×r, and the radius r of the lead hole 10 is generally set in the range of 4mm to 6mm, and in a specific implementation process, the radius r of the lead hole 10 may be set to 5mm.

In other embodiments, the back plate glass 100 may also have both the inner bump 101 and the back bump 102. At this time, the dimensions of the inner bump 101 and the back bump 102 in each direction, such as the length and thickness, may be reduced appropriately compared to the embodiment of only the inner bump 101 or the back bump 10, which will not be further described herein.

Referring to fig. 8, the present utility model further provides a dual-glass assembly, which includes a solar cell 300, and the back sheet glass 100 disposed on the back side of the solar cell 300 as described above. Specifically, the double-glass assembly includes, in the direction from the back surface to the front surface, a back plate made of any one of the above back plate glasses 100, a lower adhesive film 41, a solar cell 300, an upper adhesive film 42, and a glass cover plate 100 in this order, and the multi-layer structure is formed by lamination.

The lead hole 10 on the back plate glass 100 is used for current extraction, and is used for passing through current extraction components such as bus bars and the like and extracting the current to the back surface so as to be connected with a junction box on the back surface of the back plate glass 100.

In summary, according to the back plate glass 100 of the present utility model, by arranging the dispersing structures on the two sides of the lead hole 10 along the length direction of the back plate glass 100, the stress born by the corresponding position is dispersed by the stress dispersing structures, so that the probability of cracking of the back plate glass 100 at the position of the lead hole 10 can be effectively reduced, and the stability of the dual-glass assembly is further improved.

It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and they are not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The utility model provides a backplate glass for two glass components, backplate glass's middle zone is provided with the lead wire hole, its characterized in that, backplate glass still includes stress dispersion structure, stress dispersion structure is located the lead wire hole is along backplate glass length direction's both sides.

2. The back plate glass of claim 1, wherein the stress-dispersing structure comprises an inner bump protruding from an inner wall of the wire hole toward an inside of the wire hole.

3. The back plate glass according to claim 2, wherein the lead hole is a circular hole, and the protruding length d1 of the inner bump in the lead hole radial direction is related to the thickness H of the back plate glass by: d1 is less than or equal to 1/2H and less than or equal to 2H.

4. A back plate glass according to claim 3, wherein the inner bump is the same thickness as the back plate glass.

5. A back plate glass according to claim 3, wherein the length L1 of each of the inner bumps in the circumferential direction of the lead hole is in relation to the circumferential length C of the lead hole: l1 is more than or equal to 1/8C and less than or equal to 1/4C.

6. The back sheet glass of any one of claims 1 to 5, wherein the stress-dispersing structure further comprises a back bump protruding from a back surface of the back sheet glass toward a back direction, the back bump being disposed adjacent to an edge of the lead hole.

7. The back plate glass according to claim 6, wherein the protruding height H2 of the back bump in the back direction is related to the thickness H of the back plate glass by: h2 is more than or equal to 1/4H and less than or equal to 1/2H.

8. The back plate glass according to claim 6, wherein the lead hole is a circular hole, and the relation between the width d2 of the back bump in the radial direction of the lead hole and the thickness H of the back plate glass is 1/2 H.ltoreq.d2.ltoreq.2H.

9. The back plate glass according to claim 6, wherein a length L2 of a side edge of each of the back bumps adjacent to the edge of the lead hole in the circumferential direction of the lead hole is in relation to a circumference C of the lead hole: l2 is more than or equal to 1/8 and less than or equal to 1/4.

10. A dual-glass assembly comprising a solar cell, wherein the dual-glass assembly further comprises a back-sheet glass according to any one of claims 1-9 disposed on the back side of the solar cell.