Welding bottom plate, welding device and series welding machine

Abstract

The utility model discloses a welding bottom plate, a welding device and a series welding machine, the welding bottom plate comprises a glass substrate, the glass substrate comprises an incident surface and a reflecting surface which are arranged back to back, and the reflecting surface is provided with a light trapping structure; the reflecting film is arranged on the surface of the light trapping structure; the light trapping structure is used for being matched with the reflecting film to reflect light emitted by a welding lamp box in the series welding machine. The light trapping structure is arranged on the reflecting surface of the welding bottom plate, the reflecting film is arranged on the surface of the light trapping structure, and the light trapping structure and the reflecting film can be matched to reflect the infrared light incident through the incident surface. Infrared light which is emitted by a welding lamp box and penetrates through gaps between adjacent battery pieces can be reflected back to the battery pieces in the welding process, the light source utilization rate is effectively improved, and the overall heating efficiency and welding efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of photovoltaic cell manufacturing, and in particular to a welding base plate, a welding device and a string welding machine. Background Art

[0002] In the production process of battery strings, it is necessary to lay fixed welding tapes on the grid lines of multiple battery cells in the battery string, and then transport the battery string and the fixed-length welding tapes to the welding light box for welding. The welding light box heats the welding battery cells and welding tapes by emitting infrared light to the battery string, thereby realizing the series connection of the battery cells.

[0003] Since there are gaps between adjacent battery cells in a battery string and the length of a battery cell is smaller than the width of a welding base plate, infrared light may penetrate through the gaps between adjacent battery cells during the welding process of the battery string. The infrared light cannot fully irradiate the battery cell, and the partially penetrated infrared light cannot play a heating role, thereby reducing the utilization rate of the light source. Utility Model Content

[0004] The purpose of the present application is to provide a welding base plate, a welding device and a string welding machine to solve the technical problem in the prior art that during the welding process of the battery string, infrared light penetrates through the gaps between adjacent battery cells, the infrared light cannot be fully irradiated onto the battery cells, and the part of the infrared light that penetrates cannot play a heating role, thereby reducing the utilization rate of the light source.

[0005] To achieve the above purpose, a technical solution adopted in this application is:

[0006] A welding base plate is provided, which is applied to a string welding machine, and the welding base plate comprises:

[0007] A glass substrate, comprising an incident surface and a reflective surface disposed opposite to each other, wherein the reflective surface is provided with a light trapping structure;

[0008] A reflective film, arranged on the surface of the light trapping structure;

[0009] The light trapping structure is used to cooperate with the reflective film to reflect the light emitted by the welding light source in the string welding machine.

[0010] In one or more embodiments, the light trapping structure includes a plurality of pyramid-shaped microstructures arranged on the reflective surface, and the pyramid-shaped microstructures extend from the reflective surface in a direction away from the incident surface.

[0011] In one or more embodiments, the reflective surface is evenly covered with the pyramid-shaped microstructures.

[0012] In one or more embodiments, the reflective film is an aluminum film.

[0013] To achieve the above purpose, another technical solution adopted by this application is:

[0014] A welding device is provided, comprising:

[0015] The welding base plate as described in any one of the above embodiments;

[0016] A welding light box is arranged on one side of the incident surface of the welding base plate, the welding light box is arranged opposite to the welding base plate, and the welding light box is used to emit infrared light toward the welding base plate;

[0017] Wherein, a welding station for placing the battery string to be welded is formed between the welding base plate and the welding light box.

[0018] In one or more embodiments, a conveying unit is further included, and the conveying unit is used to convey the battery string to be welded to the welding station.

[0019] In one or more embodiments, the conveying unit includes a first conveyor belt and a second conveyor belt which are independent of each other and are respectively arranged on both sides of the welding station.

[0020] In one or more embodiments, the length of the battery string to be welded is greater than the distance between the first conveyor belt and the second conveyor belt, so that the battery string to be welded can be transported from the first conveyor belt to the second conveyor belt.

[0021] In one or more embodiments, the orthographic projection of the welding light box on the surface of the welding base plate covers the welding base plate.

[0022] To achieve the above purpose, another technical solution adopted by this application is:

[0023] A string welding machine is provided, comprising the welding device described in any one of the above embodiments.

[0024] Different from the prior art, the beneficial effects of this application are:

[0025] The reflective surface of the welding base plate of the present application is arranged with a light-trapping structure, and a reflective film is arranged on the surface of the light-trapping structure. The light-trapping structure and the reflective film can cooperate to reflect the infrared light incident through the incident surface. When applied to a string welding machine, the infrared light emitted by the welding light box that penetrates the gap between adjacent battery cells can be reflected back to the battery cells during the welding process, effectively improving the utilization rate of the light source;

[0026] When the welding device of the present application is in welding operation, the welding base plate can reflect the infrared light that penetrates the gap between adjacent battery cells back to the battery cells, thereby improving the light source utilization rate of the welding light box and improving the overall heating efficiency and welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a structural schematic diagram of an implementation method of a welding base plate of the present application;

[0029] Figure 2 It is a structural schematic diagram of an embodiment of the welding device of the present application;

[0030] Figure 3 yes Figure 2 Schematic diagram of the top view structure.

[0031] Reference numerals:

[0032] Welding base plate 100; glass substrate 101; incident surface 1011; reflecting surface 1012; light trapping structure 1013; pyramid-shaped microstructure 10131; reflecting film 102;

[0033] Welding light box 200;

[0034] 300 welding stations;

[0035] A battery string 400 to be welded; a battery cell 401;

[0036] Conveying unit 500 ; first conveyor belt 501 ; second conveyor belt 502 . DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work should fall within the scope of protection of this application.

[0038] At present, during the welding process of battery strings, part of the infrared light emitted by the welding light box will pass through the gaps between adjacent battery cells, resulting in a waste of light source.

[0039] In order to solve the above problems, the applicant has developed a new type of welding base plate, which can be applied under the welding light box. During the welding process, the welding base plate can reflect the infrared light penetrating through the gap between adjacent battery cells back to the battery cells, thereby effectively improving the light source utilization rate of the welding light box, reducing heat loss, and improving heating efficiency and welding efficiency.

[0040] Specifically, see Figure 1 , Figure 1 It is a structural schematic diagram of an implementation method of a welding base plate of the present application.

[0041] like Figure 1 As shown, the welding base plate 100 includes a glass substrate 101 , and the glass substrate 101 includes an incident surface 1011 and a reflective surface 1012 that are disposed opposite to each other.

[0042] The reflective surface 1012 is provided with a light trapping structure 1013, and a reflective film 102 is provided on the surface of the light trapping structure 1013. The light trapping structure 1013 is used to cooperate with the reflective film 102 to reflect the light emitted from the welding light box in the string welding machine and incident through the incident surface 1011.

[0043] In this embodiment, the light trapping structure 1013 includes a plurality of pyramid-shaped microstructures 10131 . The pyramid-shaped microstructures 10131 may be extended from the reflective surface 1012 in a direction away from the incident surface 1011 .

[0044] In other embodiments, other structures of the light trapping structure 1013 may also be used, such as a square or other uneven surface structure, which can reflect the infrared light incident through the incident surface 1011 and can achieve the effect of this embodiment.

[0045] In this embodiment, in order to maximize the utilization rate of the light source, the reflective surface 1012 is evenly covered with pyramid-shaped microstructures 10131; in other embodiments, the arrangement area of ​​the light-trapping structure 1013 can also be adjusted based on actual working conditions, which will not be repeated here.

[0046] In one embodiment, the light trapping structure 1013 can be integrally formed with the glass substrate 101. For example, the light trapping structure 1013 can be obtained by etching the glass substrate 101. Of course, in other embodiments, the light trapping structure 1013 can also be obtained by deposition or other methods, which can also achieve the effect of this embodiment.

[0047] In one embodiment, the reflective film 102 may be an aluminum film with a high reflectivity. In other embodiments, the reflective film 102 may also be made of other highly reflective materials, such as a silver film.

[0048] It can be understood that by arranging the light trapping structure 1013 and the reflective film 102 on the reflective surface 1012 of the welding base plate 100, the infrared light emitted by the welding light box that penetrates the gap between adjacent cells can be reflected back to the cells during the welding process, thereby effectively improving the utilization rate of the light source.

[0049] The present application also provides a welding device for welding the bottom plate 100 using the above-mentioned embodiments, see Figure 2 and Figure 3 , Figure 2 It is a structural schematic diagram of an embodiment of the welding device of the present application. Figure 3 yes Figure 2 Schematic diagram of the top view structure.

[0050] like Figure 2 As shown, the welding device includes a welding base plate 100 and a welding light box 200 which are arranged opposite to each other, wherein the welding light box 200 is arranged on one side of the incident surface 1011 of the welding base plate 100 , and the welding light box 200 is used to emit light in the direction of the welding base plate 100 .

[0051] In one embodiment, the light may be infrared light.

[0052] A welding station 300 for placing the battery string 400 to be welded is formed between the welding base plate 100 and the welding light box 200 .

[0053] To ensure the welding effect, in this embodiment, the orthographic projection of the welding light box 200 on the surface of the welding base plate 100 covers the welding base plate 100 , thereby ensuring that all parts of the battery cell 401 at the welding station 300 are irradiated by the infrared light of the welding light box 200 .

[0054] Furthermore, in order to improve welding efficiency, the welding device in this embodiment further includes a conveying unit 500 , and the conveying unit 500 is used to convey the battery string 400 to be welded to the welding station 300 .

[0055] Specifically, the conveying unit 500 includes a first conveying belt 501 and a second conveying belt 502 which are independent of each other and are disposed on both sides of the welding station 300 .

[0056] The length of the battery string 400 to be welded is greater than the distance between the first conveyor belt 501 and the second conveyor belt 502 , so that the battery string 400 to be welded can be transported from the first conveyor belt 501 to the second conveyor belt 502 .

[0057] In one embodiment, the length of the battery string 400 to be welded may be three times the length of the welding base plate 100 , thereby ensuring that the battery string 400 to be welded can be transported to the second conveyor belt 502 via the first conveyor belt 501 .

[0058] By using the first conveyor belt 501 and the second conveyor belt 502 that are independently arranged in two sections, it is easier to find out the cause compared to an integrated conveyor belt, thus reducing the time for repairing the machine and improving efficiency.

[0059] Based on the welding devices of the above-mentioned embodiments, during operation, the welding base plate 100 can reflect the infrared light penetrating the gap between adjacent battery cells 401 back to the battery cells 401, thereby improving the light source utilization rate of the welding light box 200 and improving the overall heating efficiency and welding efficiency.

[0060] The present application also provides a string welding machine, comprising a welding device according to any one of the above-mentioned embodiments. Compared with conventional string welding machines, the string welding machine has higher light source utilization rate, heating efficiency and welding efficiency.

[0061] For those skilled in the art, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0062] The foregoing description of the specific exemplary embodiments of the present application is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present application to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present application and its practical application, so that those skilled in the art can realize and utilize the various exemplary embodiments of the present application and various selections and changes. The scope of the present application is intended to be limited by the claims and their equivalents.

Claims

1. A welding base plate, characterized in that: Applied to a string welding machine, the welding base plate comprises: A glass substrate, comprising an incident surface and a reflective surface disposed opposite to each other, wherein the reflective surface is provided with a light trapping structure; A reflective film, arranged on the surface of the light trapping structure; The light trapping structure is used to cooperate with the reflective film to reflect the light emitted from the welding light box in the string welding machine and incident through the incident surface.

2. The welding base plate according to claim 1, characterized in that: The light trapping structure includes a plurality of pyramid-shaped microstructures arranged on the reflective surface, and the pyramid-shaped microstructures extend from the reflective surface in a direction away from the incident surface.

3. The welding base plate according to claim 2, characterized in that: The reflective surface is evenly covered with the pyramid-shaped microstructures.

4. The welding base plate according to claim 1, characterized in that: The reflective film is an aluminum film.

5. A welding device, characterized in that: Used for welding photovoltaic modules, the welding device comprises: The welded base plate according to any one of claims 1 to 4; A welding light box is arranged on one side of the incident surface of the welding base plate, the welding light box is arranged opposite to the welding base plate, and the welding light box is used to emit light toward the welding base plate; Wherein, a welding station for placing the battery string to be welded is formed between the welding base plate and the welding light box.

6. The welding device according to claim 5, characterized in that: It also includes a conveying unit, which is used to convey the battery string to be welded to the welding station.

7. The welding device according to claim 6, characterized in that: The conveying unit comprises a first conveying belt and a second conveying belt which are independent of each other and are arranged on both sides of the welding station.

8. The welding device according to claim 7, characterized in that: The length of the battery string to be welded is greater than the distance between the first conveyor belt and the second conveyor belt, so that the battery string to be welded can be transported to the second conveyor belt via the first conveyor belt.

9. The welding device according to claim 5, characterized in that: The orthographic projection of the welding light box on the surface of the welding base plate covers the welding base plate.

10. A string welding machine, characterized in that: A welding device comprising any one of claims 5 to 9.

Images