CN219180526U

CN219180526U - Punched type reflective welding strip for laminated tile assembly and laminated tile assembly

Info

Publication number: CN219180526U
Application number: CN202223099706.7U
Authority: CN
Inventors: 程中广; 闵耀焰
Original assignee: Wuxi Sveck Technology Co ltd
Current assignee: Wuxi Sveck Technology Co ltd
Priority date: 2022-11-22
Filing date: 2022-11-22
Publication date: 2023-06-13
Anticipated expiration: 2032-11-22

Abstract

The utility model belongs to the photovoltaic module welding technology, and particularly relates to a punched reflective welding strip for a laminated tile module and the laminated tile module. The punched reflective welding strip for the shingle assembly comprises a front welding area, a back welding area and a series welding area positioned between the front welding area and the back welding area, hollow areas are respectively arranged between the series welding area and the front welding area as well as between the series welding area and the back welding area, the hollow areas are arranged at intervals, and connecting areas are arranged between the adjacent hollow areas. The reflective welding strip disclosed by the utility model reserves a series welding area when being formed, only needs to be punched to form a hollowed area, the material use efficiency can reach 75% -90%, the loss of a base material is greatly reduced, and the reflective welding strip is not required to be additionally connected with a battery piece in series after being welded, so that the loss of the base material is reduced, and meanwhile, one welding procedure can be reduced; the surface of the welding strip has a light reflection function, light rays irradiated to the surface of the welding strip can be reflected to adjacent battery pieces, the original wasted area is utilized, and the power of the tile-overlapping assembly is improved.

Description

Punched type reflective welding strip for laminated tile assembly and laminated tile assembly

Technical Field

The utility model belongs to the photovoltaic module welding technology, and particularly relates to a punched reflective welding strip for a laminated tile module and the laminated tile module.

Background

The laminated tile assembly is an important assembly mode in the photovoltaic assembly, and the front faces of the battery pieces for the assembly are not provided with main grids, so that the series welding of welding belts is not needed, and the battery pieces are connected by means of conductive adhesive. But the series connection of the battery strings still needs welding belts with specific specifications to form a series or parallel battery pack, and the welding belts used for welding the stacked tile assemblies are the stacked tile welding belts.

At present, most of the laminated welding strips are thin and wide foil welding strips, one type of welding strips is required to reserve a safe space for a battery string, the middle of the welding strips is required to be hollowed out, the hollowed-out part occupies 43% -62% of the whole area, as shown in the attached drawing 1, but the welding strips are required to be additionally used for series connection after being welded with battery pieces, the working procedure is relatively complex, the substrate loss is large, the cost is high, a gap of 6-10 mm is reserved between the battery pieces, the part basically has no conversion rate and belongs to the loss area, and therefore, the existing welding scheme has a larger lifting space.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a punching type reflective welding strip for a laminated tile assembly and the laminated tile assembly. The reflective welding strip disclosed by the utility model reserves a series welding area when being formed, only needs to be punched to form a hollowed area, the material use efficiency can reach 75% -90%, the loss of a base material is greatly reduced, and the reflective welding strip is not required to be additionally connected with a battery piece in series after being welded, so that the loss of the base material is reduced, and meanwhile, one welding procedure can be reduced; the surface of the welding strip has a light reflection function, light rays irradiated to the surface of the welding strip can be reflected to adjacent battery pieces, the original wasted area is utilized, and the power of the tile-overlapping assembly is improved.

In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the utility model is as follows:

in a first aspect, an embodiment of the present utility model provides a punched reflective solder strip for a shingle assembly, including a front welding area, a back welding area, and a series welding area therebetween, wherein hollow areas are respectively disposed between the series welding area and the front welding area and between the series welding area and the back welding area, the hollow areas are disposed at intervals, and a connection area is disposed between adjacent hollow areas.

Further, the punching type reflective welding strip is integrally formed by a copper base material, and triangular grooves which are regularly distributed are formed in the upper surface of the punching type reflective welding strip.

Further, the upper surfaces of the front welding area and the series welding area are provided with a first welding layer with the thickness of 1-10 mu m, and the lower surfaces of the front welding area and the series welding area are provided with a second welding layer with the thickness of 25+/-10 mu m.

Further, the whole thickness of the punching type reflective welding strip is 0.05-0.15 mm, and the width is 4-30 mm; the width of the front welding area is 2+/-1 mm, and the width of the back welding area is 4+/-2 mm; the width of the hollow area is 5+/-3 mm, and the length of the hollow area is 25+/-10 mm; the width of the connecting region is 2+/-1 mm.

Further, the head and the tail of the series welding area are respectively outwards protruded for 3-10 mm to form protruding parts.

Further, the upper surface of the back welding area is provided with a third welding layer with the thickness of 20-70 mu m, the lower surface of the back welding area is provided with a fourth welding layer with the thickness of 25+/-10 mu m, and the thickness of the third welding layer is not smaller than the groove depth of the triangular groove. Preferably, the triangular grooves have a groove depth of 40+ -20 μm.

Further, the triangular groove is provided with two reflecting surfaces, the two reflecting surfaces form a V-shaped section with an included angle of 120 DEG + -20 DEG, and the reflecting surfaces are formed by a copper base material and a reflecting coating with a thickness of 1-15 mu m coated on the copper base material.

In a second aspect, an embodiment of the present utility model provides a tile stacking assembly, including the punched light-reflecting solder strip and the battery pieces, where the battery pieces are arranged in a tile stacking manner, and the punched light-reflecting solder strip is disposed at a position where the two battery pieces overlap.

Further, the lower surface of the front welding area of the punching type reflective welding strip is welded with the front surface of the first battery piece, and the upper surface of the back welding area is welded with the back surface of the second battery piece.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

the punched reflective welding strip reserves a series welding area when being formed, only needs to be punched to form a hollowed area, the use efficiency of a base material can reach 75% -90%, the loss of the base material is greatly reduced, the material consumption cost is reduced, the welding strip is not required to be additionally used for series connection after the punched reflective welding strip is welded with a battery piece, the loss proportion of the base material is reduced, one welding procedure can be reduced, and the production efficiency of a laminated tile assembly is improved; the surface of the welding strip has a light reflection function, light rays irradiated to the surface of the welding strip can be reflected to adjacent battery pieces, the original wasted area is utilized, and the power of the tile-overlapping assembly is improved.

The sizes of all areas of the punching type reflective solder strip can be adjusted according to the sizes and arrangement modes of the battery pieces, so that the material loss can be reduced to the greatest extent, the processing steps are reduced, the production efficiency is improved, the reflective lines on the surface of the solder strip can utilize the blank areas among the battery pieces to the greatest extent, the light source of the part can be fully utilized, and the assembly efficiency is improved.

The punching type reflective welding strip can meet the welding with the anode and the cathode of the battery piece, ensure the reflective effect of the front surface of the welding strip, avoid the interference of the welding strip on the battery piece and prevent the edge of the battery piece from being broken.

Drawings

Fig. 1 is a schematic view of a prior art solder strip.

Fig. 2 is a schematic structural view of a punched solder strip according to an embodiment of the present utility model.

Fig. 3 is an enlarged detail view of the punched solder strip i of fig. 2.

Fig. 4 is a right side view of the punched solder strip of fig. 2.

Fig. 5 is an enlarged detail view of the punched solder strip ii of fig. 4.

Fig. 6 is a schematic view of the construction of a shingle assembly according to an embodiment of the present utility model.

Fig. 7 is a B-B cross-sectional view of the shingle assembly of fig. 6.

Reference numerals illustrate: 1-front side welding area; 2-a backside bond pad; 3-series welding area; 4-hollow areas; a 5-linkage region; 6-triangular grooves; 7-a boss; 8-a first battery piece; 9-a second battery piece; 13-a first solder layer; 31-a second solder layer; 20-a third solder layer; 21-a fourth solder layer; 61-reflective surface.

Detailed Description

In the description of the present utility model, it should be understood that the azimuth or positional relationship indicated by the azimuth words such as "inner, outer", "upper, lower", "left, right", etc. are generally based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these azimuth words do not indicate or imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth without restricting the scope of protection of the present utility model.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Example 1

As shown in fig. 2-5, a punched reflective welding strip for a shingle assembly comprises a front welding area 1, a back welding area 2 and a series welding area 3 between the front welding area 1 and the back welding area 2, hollow areas 4 are respectively arranged between the series welding area 3 and the front welding area 1 and between the series welding area 3 and the back welding area 2, the hollow areas 4 are arranged at intervals, and a connecting area 5 is arranged between every two adjacent hollow areas 4.

The punching type reflector strip is integrally formed by adopting a copper base material, and the upper surface of the punching type reflector strip is provided with triangular grooves 6 which are regularly distributed.

The hollow area 4 is a welding strip with the part removed by stamping or other processing modes, and has the function of leaving enough safety space for the battery piece, when the battery piece is subjected to thermomechanical deformation under the influence of external environment, the welding strip in the area can play a role similar to a buffer tube, and the connecting area generates deformation, so that the pressure caused by the volume change of the battery piece is eliminated, and the hollow area 4 has the function of reducing the mechanical strength of the connecting area 5, so that the connecting area 5 is easier to deform, and the battery piece is better protected.

The front bonding region 1 and the series bonding region 3 have a first solder layer 13 having a thickness of 1 to 10 μm on the upper surface and a second solder layer 31 having a thickness of 25.+ -.10 μm on the lower surface. Wherein the thickness of the first solder layer 13 is smaller than the groove depth of the triangular groove 6. Wherein the thickness of the first solder layer 13 may be selected from 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 8 μm, 9 μm, 10 μm, etc., and is set as needed. The thickness of the second solder layer 31 is preferably 25 μm, and can be adjusted accordingly as needed.

The back bonding region 2 has a third solder layer 20 having a thickness of 20 to 70 μm on the upper surface and a fourth solder layer 21 having a thickness of 25.+ -.10 μm on the lower surface, and the thickness of the third solder layer 20 is not less than the groove depth of the triangular groove 6. Preferably, the triangular grooves 6 have a groove depth of 40±20 μm, and the fourth solder layer 21 has the same thickness as the second solder layer 31.

Wherein the thickness of the third solder layer 20 is selected from 20 μm, 25 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, etc., and is set as needed; the depth of the triangular grooves 6 is preferably 40 μm, and can be adjusted as required.

The head and the tail of the series welding area 3 are respectively outwards protruded by 3-10 mm to form the protruding parts 7, and only the protruding parts 7 at the two ends of the welding strip series welding area 3 are required to be subjected to lap welding during series welding.

The triangular groove 6 is provided with two light reflecting surfaces 61, the light reflecting surfaces 61 form a V-shaped section with an intersecting angle of 120 DEG + -20 DEG, and the light reflecting surfaces are formed by a copper base material and a light reflecting coating with a thickness of 1-15 mu m coated on the copper base material. Wherein the included angle of the V-shaped section is preferably 120 DEG, the thickness of the reflective coating can be selected from 1 mu m, 2 mu m, 3 mu m, 4 mu m, 5 mu m, 6 mu m, 7 mu m, 8 mu m, 10 mu m, 12 mu m, 14 mu m, 15 mu m and the like, and the reflective coating can be correspondingly adjusted according to requirements.

The whole thickness of the punched light-reflecting welding strip is 0.05-0.15 mm, and the width is 4-30 mm; the width of the front welding area 1 is 2+/-1 mm, and the width of the back welding area 2 is 4+/-2 mm; the width of the single hollowed-out area 4 is 5+/-3 mm, and the length is 25+/-10 mm; the width of the connection region 5 is 2.+ -.1 mm.

For example, the cell string spacing of a certain assembly factory is 12mm, the cell type is 180, the arrangement is 12 x 6, the welding strip can be designed to be 20mm in total width, the front welding zone 1 is 2mm in width, the back welding zone 2 is 4mm in width, the hollowed-out zone 4 is 4mm in width and 26.5 mm in length, thus the width of the string welding zone 3 is 20-2-4-4*2 =6 mm, the width of the connecting zone 5 is 2mm, the length of one period welding strip is 543mm, and the length of one period string welding zone is 552mm.

In this state, the utilization rate of the copper substrate is 62% and is 27% higher than that of the welding strip in the prior art of fig. 1 (35%) by adopting the laminated tile light-reflecting welding strip of the embodiment. Meanwhile, the triangular grooves 6 with reflecting surfaces are arranged on the front surfaces (namely the upper surfaces) of the welding strips, so that the solder consumption can be reduced by about 24%, and the material loss is greatly reduced.

In addition, the solder strip can provide a light reflecting effect by using a blank area of about 60%, and the overall efficiency of the assembly can be improved by 0.5% -1%.

Example 2

As shown in fig. 6-7, a tile-stacking assembly includes the punched-type solder strip and the battery pieces in embodiment 1, in which the battery pieces are arranged in a tile-stacking manner, and the punched-type solder strip is disposed at the overlapping position between the two battery pieces.

Specifically, the lower surface of the front surface welding area 1 of the punching type light reflection welding belt is welded with the front surface of the first battery piece 8, and the upper surface of the back surface welding area 2 is welded with the back surface of the second battery piece 9.

Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same, and although the present utility model has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present utility model without departing from the spirit and scope of the technical solution of the present utility model, and all such modifications and equivalents are intended to be encompassed in the scope of the claims of the present utility model.

Claims

1. The utility model provides a tile subassembly is with punching type reflector welding area, its characterized in that includes positive welded zone (1), back welded zone (2) and is located series welding zone (3) between the two, be provided with fretwork district (4) between series welding zone (3) and positive welded zone (1) and back welded zone (2) respectively, fretwork district (4) interval sets up, is provided with connecting region (5) between adjacent fretwork district (4).

2. The punched solder strip for shingle assemblies according to claim 1, wherein the punched solder strip is integrally formed of a copper base material and has triangular grooves (6) arranged regularly on its upper surface.

3. The punched reflective solder strip for a shingle assembly according to claim 1, wherein the front surface bonding area (1) and the series bonding area (3) have a first solder layer (13) with a thickness of 1-10 μm on the upper surface and a second solder layer (31) with a thickness of 25±10 μm on the lower surface.

4. The punched type reflector strip for a shingle assembly according to claim 1, wherein the punched type reflector strip has an overall thickness of 0.05-0.15 mm and a width of 4-30 mm; the width of the front welding area (1) is 2+/-1 mm, and the width of the back welding area (2) is 4+/-2 mm; the width of the hollowed-out area (4) is 5+/-3 mm, and the length is 25+/-10 mm; the width of the connecting area (5) is 2+/-1 mm.

5. The punched reflector strip for a shingle assembly according to claim 1, wherein the head and the tail of the series welding area (3) respectively protrude outwards by 3-10 mm to form a protruding part (7).

6. The punched reflective solder strip for a shingle assembly according to claim 2, wherein the upper surface of the back bonding region (2) has a third solder layer (20) having a thickness of 20 to 70 μm, the lower surface has a fourth solder layer (21) having a thickness of 25±10 μm, and the thickness of the third solder layer (20) is not less than the groove depth of the triangular groove (6).

7. Punching type reflector strip for a shingle assembly according to claim 2, characterized in that the triangular groove (6) has two reflector surfaces (61), the two reflector surfaces (61) forming a V-shaped cross section with an angle of 120 ° ± 20 °, the reflector surfaces being formed by a copper substrate and a reflector coating applied thereon with a thickness of 1-15 μm.

8. A shingle assembly comprising punched light reflective solder strips and battery cells according to any one of claims 1 to 7, wherein the battery cells are arranged in shingle arrangement, and the punched light reflective solder strips are disposed at the overlapping position between the two battery cells.

9. The shingle assembly according to claim 8, wherein the lower surface of the front bonding pad (1) of the punched reflector tape is bonded to the front side of the first cell (8), and the upper surface of the back bonding pad (2) is bonded to the back side of the second cell (9).