Photovoltaic welding device

Abstract

The photovoltaic welding device comprises a hold-down device, the hold-down device comprises a cavity, a telescopic film is arranged below the cavity, the hold-down device comprises an inflation inlet, and the telescopic film is made to bulge downwards by inflating the inflation inlet; a to-be-welded part is arranged on the bearing table; the lifting device is arranged on the bearing table or the hold-down clamp to enable the bearing table and the hold-down clamp to move close to or away from each other; and the non-contact welding assembly is arranged above the telescopic film. According to the non-contact type welding device, welding is conducted, the mode that the telescopic film is pressed downwards through inflation is adopted, pressing of the welding strip of the to-be-welded piece and the battery piece is achieved, the pressing position comprises the welding spot position, the pressure is more uniform, fragment or hidden crack of the battery piece is avoided, and the good welding effect is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of solar cell processing, and relates to a photovoltaic welding device. BACKGROUND

[0002] At present, welding of a solar cell can be carried out by using wave soldering, infrared soldering, laser soldering and the like. Different heat sources are used to heat so as to weld a solder strip and grid lines of a solar cell together.

[0003] No matter what kind of welding is used, in order to achieve the welding effect, the solder strip and the grid lines of the solar cell need to be closely attached. At present, a press is usually used to press the solder strip, and the press needs to avoid the welding spot so as to complete the welding. The welding spot is prone to be pressed tightly, or the solar cell is prone to be cracked. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a photovoltaic welding device which can press the solar cell and the solder strip tightly and avoid cracking the solar cell.

[0005] In order to achieve the above technical purpose, the application provides a photovoltaic welding device which comprises a press, the press comprises a cavity, a stretchable film is arranged below the cavity, the press comprises an air inlet, the stretchable film is inflated downward by inflating the air inlet; a bearing table is further arranged, the bearing table is provided with a welding piece; a lifting device is arranged on the bearing table or the press, so that the bearing table and the press move close to or away from each other; and a non-contact welding assembly is arranged above the stretchable film.

[0006] In an embodiment of the photovoltaic welding device, the non-contact welding assembly is a laser processing assembly or an infrared lamp tube processing assembly.

[0007] In an embodiment of the photovoltaic welding device, the stretchable film is a transparent stretchable film.

[0008] In an embodiment of the photovoltaic welding device, the non-contact welding assembly is a laser processing assembly, the transparent stretchable film has a transmittance of laser of more than 90%; or the non-contact welding assembly is an infrared lamp tube processing assembly, and the transparent stretchable film has a transmittance of infrared light of more than 90%.

[0009] In an embodiment of the photovoltaic welding device, the non-contact welding assembly is arranged above the press.

[0010] In an embodiment of the photovoltaic welding device, a top plate is arranged above the cavity, and the top plate is a transparent material top plate.

[0011] In an embodiment of the photovoltaic welding device, the top plate is a transparent stretchable film or glass.

[0012] The non-contact welding assembly of the photovoltaic welding device of one embodiment is a laser processing assembly or an infrared lamp tube processing assembly, which is arranged in the cavity. The stretchable film of the photovoltaic welding device of one embodiment can be polybutylene terephthalate, polyhexamethylene terephthalate-co-sebacate, COPA, silicone, polyvinylidene chloride-polyolefin blend, polyamide, thermoplastic polyolefin elastomer, modified high-density polyethylene PE, epoxy resin with curing agent, or composite resin including polyvinylidene chloride. The stretchable film covers the bearing table of the photovoltaic welding device of one embodiment.

[0013] The non-contact welding assembly of the photovoltaic welding device of one embodiment is a microwave heating welding assembly or an electromagnetic induction heating welding assembly.

[0014] The above technical solutions achieve the following technical effects.

[0015] The non-contact welding device is used for welding in the application, and the inflation mode of the stretchable film is used to press the welding strip and the battery piece, the pressing position includes the welding point position, the pressure is more uniform, the fragments or hidden cracks of the battery piece are avoided, and good welding effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 The structure schematic diagram of a photovoltaic welding device of one embodiment of the application is shown in the figure.

[0018] Figure 2 The structure schematic diagram of a photovoltaic welding device of one embodiment of the application is shown in the figure.

[0019] Figure 3 The structure schematic diagram of one state of the welding device of one embodiment of the application is shown in the figure.

[0020] Figure 4 The structure schematic diagram of another state of the welding device of one embodiment of the application is shown in the figure.

[0021] Figure 5 The structure schematic diagram of another state of the welding device of one embodiment of the application is shown in the figure.

[0022] Figure 6 The structure schematic diagram of a photovoltaic welding device of one embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0023] In order to make the above objectives, features and advantages of the present application more clear and easy to understand, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0024] In the following description, a lot of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other different ways from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0025] Secondly, the present application is described in detail in combination with the schematic diagram, when the embodiments of the present application are described, the cross-sectional view of the device structure will be partially enlarged without the general proportion for the convenience of description, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in the actual manufacture.

[0026] At present, the welding of solar cells needs to paste the solder strip and the grid line electrode of the solar cell piece closely, at present, the solder strip is usually pressed down by a press, the press needs to avoid the welding spot to complete the welding, the pressing at the welding spot is prone to be not tight, or the cell piece is prone to be cracked and other problems. The present application provides a photovoltaic welding device, which aims to solve the above problems.

[0027] The present application provides a photovoltaic welding device, referring to Figure 1 , which comprises a press 10, the press 10 comprises a cavity 11, a stretchable film 12 is arranged below the cavity 11, and a gas inlet 13 is further included. The stretchable film 12 can be inflated downward by inflating the gas inlet 13. Among them, Figure 1 The lower right corner of the press 10 is shown as a cross section, and the rest is normally displayed.

[0028] Further comprising a bearing table 20, the bearing table 20 is provided with a to-be-welded piece 1. Among them, the press 10 is arranged above the bearing table 20, when the stretchable film is inflated downward by the gas inlet, the solder strip and the cell piece of the to-be-welded piece are pressed tightly. The to-be-welded piece of the present application can be a single cell piece, a string of cell strings or a whole panel assembly. The welding device of the present application can perform the welding of the above to-be-welded pieces. Referring to Figure 1 , in a specific embodiment, the to-be-welded piece is the cell piece and the solder strip arranged according to the photovoltaic module panel type. In actual use, it can also include the encapsulating material film and glass arranged below the cell piece and the solder strip. Among them, the encapsulating material film is EVA or POE, and the glass is photovoltaic glass.

[0029] The non-contact welding assembly is arranged above the stretchable film 12. The non-contact welding assembly can be a laser processing assembly, an infrared lamp tube processing assembly, a microwave heating welding assembly, or an electromagnetic induction heating assembly.

[0030] The non-contact welding device of the application uses inflation to press the stretchable film downward, so as to press the welding strip and the battery piece to be welded, and the pressing position includes the welding point position, and the pressure is more uniform.

[0031] As a preferred embodiment, the stretchable film 12 is a transparent stretchable film. As understood by those skilled in the art, when welding by the laser processing assembly, transparent means transparent to laser, or in other words, the transmittance of laser is good, for example, the transmittance is 90% or even 95% or more. When welding by the infrared lamp tube processing assembly, transparent means transparent to infrared light, or in other words, the transmittance of infrared light is good, for example, the transmittance is 90% or even 95%.

[0032] Specifically, the stretchable film can be polybutylene terephthalate, polyhexamethylene terephthalate-co-sebacate copolymer, COPA, silica gel, polyvinylidene chloride-polyolefin blend, polyamide, thermoplastic polyolefin elastomer, modified high-density polyethylene PE, epoxy resin with curing agent, or composite resin including polyvinylidene chloride.

[0033] As another preferred embodiment, the top plate 14 above the cavity is also a transparent material top plate, for example, a transparent stretchable film, or glass, etc. When the laser or the infrared lamp tube is arranged above the press, the laser or the infrared light can be transmitted. The top plate 14 can be a light-transmitting glass top plate. When welding by the laser processing assembly, transparent means transparent to laser, or in other words, the transmittance of laser is good, for example, the transmittance is 90% or even 95% or more. When welding by the infrared lamp tube processing assembly, transparent means transparent to infrared light, or in other words, the transmittance of infrared light is good, for example, the transmittance is 90% or even 95%.

[0034] As a preferred embodiment, the welding device of the application further comprises a lifting module, and the lifting module 30 is arranged on the bearing table 20. Referring to Figure 2 The lifting module 30 is arranged below the bearing table 20, and the bearing table 20 is lifted up by the ball screw structure, or the bearing table 20 is lowered.

[0035] The single cell, the solder strip, or the cell string and the solder strip, or the whole cell plate and the solder strip, are conveyed to the carrier table 20. Then, the carrier table 20 is lifted by the lifting module 30 to be close to or contact the extensible membrane 12 of the press 10. Then, the cavity 11 is inflated through the inflation port 13, and the extensible membrane 12 is inflated to press the solder strip and the cell. Then, the soldering is performed by laser or infrared light. After the soldering is completed, the inflation is released, and then the carrier table 20 is lowered by the lifting module 30, and then the soldered material is transferred away. Alternatively, after the soldering is completed, the carrier table 20 is lowered by the lifting module 30, and the inflation is released at the same time or after the lowering. In some other embodiments, the cavity 11 is always inflated, and the extensible membrane 12 is always inflated before the soldered material of the carrier table 20 contacts and leaves the press. After the material is loaded, the carrier table 20 is lifted by the lifting module 30, the inflated extensible membrane 12 presses the solder strip and the cell, and then the soldering is performed. After the soldering is completed, the carrier table 20 is lowered by the lifting module 30, and the soldered material is removed.

[0036] The present application is not limited to this, and the lifting module can also be arranged on the press to lift or lower the press. As long as the press and the carrier table can move close to or away from each other, it is acceptable. As in the previous embodiment, the press can be lowered to be close to or contact the extensible membrane of the soldered material, and then inflated to inflate the extensible membrane to press the solder strip and the cell, and then soldered. After the soldering is completed, the press is lifted, and the inflation is released before or at the same time or after the press is lifted. Alternatively, the cavity is always inflated when the press is close to and away from the soldered material.

[0037] Referring to Figures 3 to 5 , the structural schematic diagram of the soldering device in different states is shown. Figure 3 is the state of the press without inflation; Figure 4 is the state of the press with inflation; Figure 5 is the state of the press pressing the soldered material in the inflation state.

[0038] As understood by those skilled in the art, the extensible membrane 12 should cover the soldered material to provide pressure. More preferably, referring to Figure 6 , the extensible membrane 12 covers the carrier table 20 to avoid the pressure difference at the edge, and can provide more stable pressure.

[0039] As an optional embodiment, when laser soldering or infrared soldering is used, the laser processing assembly and the infrared lamp processing assembly can be arranged above the press. When infrared soldering is used, the infrared lamp processing assembly can be arranged in the cavity. Such arrangement makes the soldering heat source closer to the soldered material, and achieves better soldering effect. It can be understood that the laser processing assembly can also be arranged in the cavity.

[0040] The above description is only the preferred embodiment of the present application, although the present application has been disclosed as above with the preferred embodiment, however, not to limit the present application. Any skilled person in the art, without departing from the scope of the technical scheme of the present application, can utilize the above disclosed methods and technical contents to make many possible changes and modifications to the technical scheme of the present application, or modify as equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical scheme of the present application, still belongs to the scope of protection of the technical scheme of the present application.

Claims

1. A photovoltaic welding device, characterized by: The press includes a cavity, and a stretchable film is arranged below the cavity. The press includes an inflation port. The stretchable film is inflated downward by inflating the inflation port. The device also includes a support platform, and the support platform is provided with a welding object. A lifting device is arranged on the support platform or the press, so that the support platform and the press move close to or away from each other. A non-contact welding assembly is arranged above the stretchable film.

2. A photovoltaic welding device according to claim 1, wherein: The non-contact welding assembly is a laser processing assembly or an infrared lamp tube processing assembly.

3. A photovoltaic welding device according to claim 2, wherein: The stretchable film is a transparent stretchable film.

4. A photovoltaic welding device according to claim 3, wherein: When the non-contact welding assembly is a laser processing assembly, the transmittance of the transparent stretchable film to laser is above 90%. When the non-contact welding assembly is an infrared lamp tube processing assembly, the transmittance of the transparent stretchable film to infrared light is above 90%.

5. A photovoltaic welding device as defined in claim 3, wherein: The non-contact welding assembly is arranged above the press.

6. A photovoltaic welding device according to claim 5, wherein: A top plate is arranged above the cavity, and the top plate is a transparent material top plate.

7. A photovoltaic welding device according to claim 6, wherein: The top plate is a transparent stretchable film or glass.

8. A photovoltaic welding device as defined in claim 4, wherein: The non-contact welding assembly is arranged in the cavity.

9. A photovoltaic welding device as defined in claim 3, wherein: The stretchable film is polybutylene terephthalate, polyhexamethylene terephthalate-co-sebacate, COPA, silica gel, polyvinylidene chloride-polyolefin blend, polyamide, thermoplastic polyolefin elastomer, modified high-density polyethylene PE, epoxy resin with curing agent, or composite resin including polyvinylidene chloride.

10. A photovoltaic welding device according to any one of claims 1 to 9, characterized in that: The stretchable film covers the support platform.

11. A photovoltaic welding device according to claim 1, wherein: The non-contact welding assembly is a microwave heating welding assembly or an electromagnetic induction heating welding assembly.

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