Welding device and photovoltaic module

Abstract

The utility model provides a welding device and a photovoltaic module, relates to the field of photovoltaic technology, and can reduce the risks of dislocation between a back plate layer and an adhesive film layer of the photovoltaic module and damage to corners of a battery piece layer in the process of welding the photovoltaic module. The welding device comprises a bearing platform used for bearing a photovoltaic module, and the photovoltaic module sequentially comprises a battery piece layer, an adhesive film layer and a back plate layer from top to bottom; the frame body comprises a first frame and a second frame, the first frame and the second frame are crossed, and the photovoltaic module is located in the frame body; the pinch plate device is located on the inner side of the outer wall of the first frame, the distance between the edge, close to the second frame, of the pinch plate device and the second frame is smaller than or equal to a first distance in the first direction, and the distance between the edge, away from the first frame, of the pinch plate device and the first frame is larger than a second distance in the second direction; the distance between the pinch plate device and the bearing platform is the sum of the thickness of the backboard layer and the thickness of the adhesive film layer, and the distance between the edge, away from the first frame, of the pinch plate device and the first frame is smaller than or equal to the third distance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of photovoltaic, in particular to a welding device and a photovoltaic module. BACKGROUND

[0002] The photovoltaic module includes a backboard layer, an adhesive film layer, a cell piece layer and the like. In the production process of the photovoltaic module, the welding device can be used to weld the photovoltaic module.

[0003] Before welding, a flexible film needs to be covered on the photovoltaic module. In the welding process, the flexible film needs to be vacuumized, and then the vacuum is broken after the welding is completed. The whole process can cause the dislocation between the backboard layer and the adhesive film layer of the photovoltaic module, and also can cause the damage to the corners of the cell piece layer. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a welding device and a photovoltaic module, which can reduce the risk of dislocation between the backboard layer and the adhesive film layer of the photovoltaic module and damage to the corners of the cell piece layer in the process of welding the photovoltaic module.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, a welding device is provided, the welding device comprising: a bearing platform configured to bear a photovoltaic module, the photovoltaic module comprising, from top to bottom, a cell piece layer, an adhesive film layer, and a backboard layer; a frame comprising a first frame and a second frame, the first frame intersecting the second frame, and the photovoltaic module being located inside the frame; a clamping plate device located on the inner side of the outer wall of the first frame, in a first direction, the distance between the edge of the clamping plate device close to the second frame and the second frame being less than or equal to a first distance, the first distance being the distance between the edge of the cell piece layer and the second frame in the first direction, in a second direction, the distance between the edge of the clamping plate device away from the first frame and the first frame being greater than a second distance, the distance between the edge of the clamping plate device away from the first frame and the first frame being less than or equal to a third distance, the second distance being the distance between the edge of the adhesive film layer and the first frame in the second direction, the third distance being the distance between the edge of the cell piece layer and the first frame in the second direction, in a third direction of the frame, the distance between the clamping plate device and the bearing platform being equal to the sum of the thickness of the backboard layer and the thickness of the adhesive film layer, the first direction being the extension direction of the first frame, the second direction being the extension direction of the second frame, the third direction being perpendicular to a target plane, and the target plane being the plane in which the first direction and the second direction lie.

[0007] In combination with the first aspect, in some embodiments of the first aspect, in the second direction, the distance between the edge of the clamping plate device and the edge of the cell piece layer is 0mm-5mm.

[0008] In some embodiments of the first aspect, the height of the buckling device in the third direction is greater than or equal to the height of the cell sheet layer.

[0009] In some embodiments of the first aspect, the length of the buckling device in the first direction is greater than or equal to the length of the cell sheet layer of the photovoltaic module in the first direction.

[0010] In some embodiments of the first aspect, the welding device further comprises a clamp, the clamp being located on the inner side of the second frame, and the clamp being configured to fix the adhesive film layer and the backboard layer.

[0011] In some embodiments of the first aspect, the clamp is connected with the second frame.

[0012] In some embodiments of the first aspect, the clamp is separated from the second frame.

[0013] In some embodiments of the first aspect, the buckling device is connected with the first frame.

[0014] In some embodiments of the first aspect, the buckling device is separated from the first frame, and the welding device further comprises a buckling cooperation device configured to cooperate with the buckling device to fix the adhesive film layer and the backboard layer.

[0015] The second aspect provides a photovoltaic module welded by the welding device of the first aspect and any one of the embodiments.

[0016] Based on the welding device, the first direction is the extension direction of the first frame, and the second direction is the extension direction of the second frame. Due to the buckling device, the distance between the edge of the buckling device and the second frame in the first direction is less than or equal to the first distance, the first distance is the distance between the edge of the cell sheet layer and the second frame in the first direction, the width of the buckling device in the second direction is greater than the second distance, the width of the buckling device is less than or equal to the third distance, the second distance is the distance between the edge of the adhesive film layer and the first frame in the second direction, and the third distance is the distance between the edge of the cell sheet layer and the first frame in the second direction. In the third direction of the frame body, the distance between the buckling device and the bearing platform is the sum of the thickness of the backboard layer and the thickness of the adhesive film layer. Therefore, the buckling device can buckle and press the cell sheet layer and the adhesive film layer of the photovoltaic module, thereby reducing the risk of misalignment between the backboard layer and the adhesive film layer of the photovoltaic module. At the same time, the edge of the cell sheet layer can be protected, thereby reducing the pressure on the edge of the cell sheet layer when the flexible film is vacuumized, and reducing the risk of damaging the edge of the cell sheet layer. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1A top view of a welding device provided for the present application;

[0018] Figure 2 A cross-sectional view of a welding device provided for the present application;

[0019] Figure 3 A top view of another welding device provided for the present application

[0020] Figure 4 A cross-sectional view of another welding device provided for the present application;

[0021] Figure 5 A cross-sectional view of another welding device provided for the present application. DETAILED DESCRIPTION

[0022] In the description of the present application, "a plurality" means two or more than two, unless otherwise specified. "At least one of the following (s)" or similar expressions means any combination of the items, including any combination of single item (s) or multiple items. For example, at least one of a, b, or c, can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, c can be single or multiple.

[0023] In addition, in order to facilitate the clear description of the technical scheme of the embodiments of the present application, in the embodiments of the present application, "first", "second" and the like are used to distinguish the same items or similar items with basically the same function and role. The skilled in the art can understand that "first", "second" and the like do not limit the quantity and execution order, and "first", "second" and the like do not necessarily mean different.

[0024] At the same time, in the embodiments of the present application, the words such as "exemplary" or "for example" are used to represent as an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. In fact, the words such as "exemplary" or "for example" are intended to present the relevant concept in a specific way, and to facilitate understanding.

[0025] It can be understood that the "embodiments" mentioned throughout the specification mean that the specific features, structures or characteristics related to the embodiments are included in at least one embodiment of the present application. Therefore, the various embodiments throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in any suitable manner in one or more embodiments. It can be understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the execution order, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0026] It can be understood that some optional features in the embodiments of the present application can be implemented independently in some scenarios without relying on other features, such as the scheme currently based on, to solve the corresponding technical problems and achieve the corresponding effects, or can be combined with other features according to the needs in some scenarios. Correspondingly, the devices given in the embodiments of the present application can also implement these features or functions accordingly, which will not be described here.

[0027] In the present application, the same or similar parts between various embodiments can be mutually referred to, unless otherwise specified. In various embodiments and various implementation methods in the embodiments, the terms and / or descriptions between different embodiments and various implementation methods in the embodiments are consistent and can be mutually referred to, unless otherwise specified and logically conflicted. The technical features in different embodiments and various implementation methods in the embodiments can be combined to form new embodiments, implementation manners, implementation methods, or implementation methods according to their inherent logical relationship. The following embodiments of the present application do not constitute a limitation on the protection scope of the present application.

[0028] The photovoltaic module includes a back plate layer, an adhesive film layer, a cell piece layer and the like. In the process of producing the photovoltaic module, the photovoltaic module can be welded by using a welding device.

[0029] The process of the welding procedure of the photovoltaic module by using the existing welding device is as follows: placing the layers of the photovoltaic module → covering a flexible film → vacuumizing → laser welding → breaking the vacuum → removing the flexible film → discharging. However, two key problems may occur when the photovoltaic module is welded by using the above-mentioned scheme: 1. After the welding of the photovoltaic module is completed, the action of removing the flexible film may cause the relative displacement between the adhesive film and the back plate, so that the creepage distance of the photovoltaic module does not meet the design requirement and affects the subsequent packaging of the photovoltaic module; 2. The action of covering the flexible film and vacuumizing may cause damage to the corners of the cell piece, including the explicit damage (the cell piece appears to be cornered in the welding procedure) or the implicit damage (the module appears to be cornered in the subsequent packaging process after the welding).

[0030] Therefore, the whole process may cause the displacement between the back plate layer and the adhesive film layer of the photovoltaic module, and may also cause the damage to the corners of the cell piece layer.

[0031] To solve the above-mentioned problems, the utility model provides a kind of welding device, Figure 1 The plan view of the welding device provided by the utility model is shown in Figure 1 As shown, the welding device 10 includes: a frame body 101, including a first frame 1011 and a second frame 1012, the first frame 1011 and the second frame 1012 intersect, and the photovoltaic module is located inside the frame body 101.

[0032] The frame 101 can be made of metal, ceramic, or other materials, and the present application does not make specific limitations in this regard.

[0033] As shown in Figure 1 The first frame 1011 can be perpendicular to the second frame 1012, or the first frame 1011 can be intersected with the second frame 1012 at an acute angle or an obtuse angle, and the present application does not make specific limitations in this regard.

[0034] As shown in Figure 1 The length of the first frame 1011 can be greater than the length of the second frame 1012. Of course, the length of the first frame 1011 can be less than or equal to the length of the second frame 1012, and the present application does not make specific limitations in this regard.

[0035] Figure 2 The present application provides a kind of welding device 10 sectional view, as shown in Figure 2 The welding device 10 further includes: a bearing platform 102 for carrying photovoltaic module, photovoltaic module from top to bottom includes cell piece layer, adhesive film layer and backboard layer in sequence.

[0036] The cell piece layer can include a plurality of cell pieces.

[0037] The bearing platform 102 can be made of metal, ceramic or glass, or other materials, and the present application does not make specific limitations in this regard.

[0038] The shape of the bearing platform 102 can be circular, triangular or rectangular, or other shapes, and the present application does not make specific limitations in this regard.

[0039] The buckle plate device 103 is located on the inner side of the outer wall of the first frame 1011.

[0040] Figure 3 The present application provides another kind of welding device top view, as shown in Figure 3 In the first direction, the distance L3 between the edge of the buckle plate device 103 close to the second frame and the second frame 1012 is less than the first distance L4, and the distance L3 between the edge of the buckle plate device 103 close to the second frame and the second frame 1012 can also be equal to the first distance L4.

[0041] The first distance L4 is the distance between the edge of the cell piece layer and the second frame 1012 in the first direction.

[0042] The first direction is the extension direction of the first frame 1011.

[0043] As shown in Figure 2As shown, in the second direction, the distance L5 between the edge of the buckle device 103 away from the first frame and the first frame is greater than the second distance L6, and the distance L5 between the edge of the buckle device 103 away from the first frame and the first frame is less than or equal to the third distance L7.

[0044] The second distance L6 is the distance between the edge of the adhesive film layer and the first frame 1011 in the second direction.

[0045] The third distance L7 is the distance between the edge of the battery cell layer and the first frame 1011 in the second direction.

[0046] The second direction is the extension direction of the second border 1012.

[0047] In the second direction, the distance between the edge of the buckle device 103 and the edge of the battery cell layer is 0mm-5mm. For example, the distance between the edge of the buckle device 103 and the edge of the battery cell layer can be 0mm, 1mm, 2mm, 3mm, 4mm, or 5mm. The smaller the distance between the edge of the buckle device 103 and the edge of the battery cell layer, the less pressure the edge of the battery cell will experience after vacuuming the flexible film, and the lower the risk of damage to the corners of the battery cell.

[0048] like Figure 2 As shown, in the third direction of the frame 101, the distance L1 between the buckle device 103 and the support platform 102 is equal to the sum of the thickness of the back panel layer and the thickness of the adhesive film layer, L2.

[0049] The third direction is perpendicular to the target plane, which is the plane containing the first and second directions.

[0050] In the third direction, the height of the buckle device 103 is greater than or equal to the height of the battery cell layer. Thus, after vacuuming the flexible film, the pressure on the edges of the battery cells can be reduced, thereby lowering the risk of damage to the cell edges and corners.

[0051] In some embodiments, the length of the buckle device 103 in the first direction may be less than the length of the solar cell layer of the photovoltaic module in the first direction. For example, the length of the buckle device 103 in the first direction may be 5cm, 6cm or 7cm. In this way, by making the buckle device 103 have a shorter length in the first direction, costs can be saved.

[0052] In some other embodiments, the length of the snap-on device 103 in the first direction is greater than or equal to the length of the cell layer of the photovoltaic module in the first direction. Thus, by making the snap-on device 103 have a longer length in the first direction, the length of the adhesive film layer in the photovoltaic module can be increased by the snap-on device 103 in the first direction, thereby further reducing the risk of misalignment between the backsheet layer and the adhesive film layer of the photovoltaic module.

[0053] In some embodiments, as shown in Figure 1 The clamping plate device 103 is connected with the first frame 1011.

[0054] In this embodiment, the process of welding the photovoltaic assembly by the welding device 10 is as follows: placing the layers of the photovoltaic assembly → clamping the adhesive film by the clamping plate device 103 → covering the flexible film → vacuumizing → laser welding → breaking the vacuum → removing the flexible film → removing the clamping device → discharging.

[0055] In some other embodiments, Figure 4 In some other embodiments, as shown in Figure 4 The clamping plate device 103 is separated from the first frame 1011, and the welding device 10 further comprises a clamping plate cooperation device 105 which cooperates with the clamping plate device 103 to fix the adhesive film layer and the back plate layer.

[0056] The clamping plate cooperation device 105 can be integrally formed with the clamping plate device 103, or the clamping plate cooperation device 105 can be assembled with the clamping plate device 103 to form an integral whole.

[0057] The distance between the integral whole formed by the clamping plate device 103 and the clamping plate cooperation device 105 and the first frame 1011 can be any distance.

[0058] In this embodiment, the process of welding the photovoltaic assembly by the welding device 10 is as follows: fixing the adhesive film and the back plate in the photovoltaic assembly by the clamping plate device 103 and the clamping plate cooperation device 105 → placing the layers of the photovoltaic assembly → covering the flexible film → vacuumizing → laser welding → breaking the vacuum → removing the flexible film → discharging → removing the clamping plate device 103 and the clamping plate cooperation device 105.

[0059] In some other embodiments, Figure 5 In some other embodiments, as shown in Figure 5 The welding device 10 further comprises a clamp 104 which is located at the inner side of the second frame 1012 and is used to fix the adhesive film layer and the back plate layer.

[0060] The number of the clamp 104 can be one or more.

[0061] The clamp 104 can be clamped at any position of the photovoltaic assembly on the side of the second frame 1012, for example, the central position or the edge position, and the utility model does not make specific limitation on this.

[0062] In some embodiments, the clamp 104 is connected with the second frame 1012. For example, the clamp 104 can be connected with the second frame 1012 in a hinged or bolted manner. In this way, the integrity of the welding device 10 can be improved.

[0063] The clamp 104 can be a jaw-type clamp or a buckle-type clamp, and of course, the clamp 104 can have other structures, which are not specifically limited in the present application.

[0064] In yet some embodiments, as shown in Figure 5 The clamp 104 is separated from the second frame 1012. In this way, the position of the clamp 104 relative to the second frame 1012 can be changed, and the flexibility of using the clamp 104 can be improved.

[0065] The clamp 104 can be a buckle-type clamp or a bolt-type clamp, and of course, the clamp 104 can have other structures, which are not specifically limited in the present application.

[0066] In practical applications, the welding device 10 further includes other devices not shown in the drawings of the present application, such as a laser emitter, a heat sink, etc.

[0067] Based on the welding device 10 provided by the present application, the first direction is the extension direction of the first frame 1011, and the second direction is the extension direction of the second frame 1012. Due to the buckle device 103, the edge of the buckle device 103 is less than or equal to the first distance from the second frame 1012 in the first direction, the first distance is the distance between the edge of the battery sheet layer and the second frame 1012 in the first direction, the width of the buckle device 103 is greater than the second distance in the second direction, the width of the buckle device 103 is less than or equal to the third distance, the second distance is the distance between the edge of the adhesive film layer and the first frame 1011 in the second direction, and the third distance is the distance between the edge of the battery sheet layer and the first frame 1011 in the second direction. In the third direction of the frame body 101, the distance between the buckle device 103 and the bearing platform 102 is the sum of the thickness of the back plate layer and the thickness of the adhesive film layer. Therefore, the buckle device 103 can buckle and press the battery sheet layer and the adhesive film layer of the photovoltaic module, and reduce the risk of misalignment between the back plate layer and the adhesive film layer of the photovoltaic module. At the same time, the edge of the battery sheet layer can be protected, the pressure on the edge of the battery sheet layer when the flexible film is vacuumized can be reduced, and the risk of damaging the edge of the battery sheet layer can be reduced.

[0068] Although the present application has been described in connection with various embodiments thereof with reference to the drawings, it will be apparent to those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite articles "a" or "an" do not exclude a plurality. A single processor or other unit can fulfil the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

[0069] Although the present application has been described in connection with specific features thereof, it will be apparent to those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Accordingly, it is intended that all such alternatives, modifications and variations be included within the scope of the present application as defined by the following claims. It will be obvious to those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope thereof. Thus, although the present application has been described in connection with specific embodiments thereof, it will be evident for a person skilled in the art that modifications and variations are possible without departing from the scope of the application as defined by the appended claims.​

Claims

1. A welding device, characterized in that, The welding device comprises: a bearing platform for bearing a photovoltaic assembly, the photovoltaic assembly comprising, from top to bottom, a cell sheet layer, a film layer and a backboard layer; a frame comprising a first frame and a second frame, the first frame intersecting the second frame, the photovoltaic assembly being located inside the frame; a buckle plate device located on the inner side of the outer wall of the first frame, in a first direction, the distance between the buckle plate device close to the edge of the second frame and the second frame being less than or equal to a first distance, the first distance being the distance between the edge of the cell sheet layer and the second frame in the first direction, in a second direction, the distance between the edge of the buckle plate device away from the edge of the first frame and the first frame being greater than a second distance, the distance between the edge of the buckle plate device away from the edge of the first frame and the first frame being less than or equal to a third distance, the second distance being the distance between the edge of the film layer and the first frame in the second direction, the third distance being the distance between the edge of the cell sheet layer and the first frame in the second direction, in a third direction of the frame, the distance between the buckle plate device and the bearing platform being equal to the sum of the thickness of the backboard layer and the thickness of the film layer, the first direction being the extension direction of the first frame, the second direction being the extension direction of the second frame, the third direction being perpendicular to a target plane, the target plane being the plane in which the first direction and the second direction lie.

2. The welding device of claim 1, wherein, In the second direction, the distance between the edge of the buckle plate device and the edge of the cell sheet layer is 0mm-5mm.

3. The welding device of claim 1, wherein, In the third direction, the height of the buckle plate device is greater than or equal to the height of the cell sheet layer.

4. The welding device of claim 1, wherein, The length of the buckle plate device in the first direction is greater than or equal to the length of the cell sheet layer of the photovoltaic assembly in the first direction.

5. The welding device of claim 1, wherein, The welding device further comprises a clamp, the clamp being located on the inner side of the second frame, the clamp being used for fixing the film layer and the backboard layer.

6. The welding device of claim 5, wherein, The clamp is connected with the second frame.

7. The welding device of claim 5, wherein, The clamp is separated from the second frame.

8. The welding device according to any of claims 1-7, characterized in that The buckle plate device is connected with the first frame.

9. The welding device according to any of claims 1-7, characterized in that The buckle plate device is separated from the first frame, and the welding device further comprises: a buckle plate cooperation device cooperating with the buckle plate device to fix the film layer and the backboard layer.

10. A photovoltaic module, characterized by, The photovoltaic assembly is welded by the welding device of any one of claims 1-9.

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