Photovoltaic welding strip and photovoltaic module

Abstract

The utility model relates to the technical field of photovoltaic modules, in particular to a photovoltaic welding strip and a photovoltaic module. The photovoltaic welding strip comprises a first section body, and the first section body comprises a first base body, a first alloy layer and a black coating. The first alloy layer is connected with the first base body, the first alloy layer is located below the first base body, the first alloy layer and the first base body jointly form a circumferential side face, and the side, away from the first base body, of the first alloy layer is a bottom face. The black coating is coated on the peripheral side surface, and the bottom surface is configured to be connected with the front surface of the battery piece. According to the photovoltaic solder strip, the usage amount of the first alloy layer can be reduced, and the cost is saved; and meanwhile, the welding performance of the photovoltaic welding strip is improved, and the product yield is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic components, in particular to a photovoltaic welding tape and a photovoltaic component. Background Art

[0002] With the continuous development of photovoltaic technology, photovoltaic modules are widely used in residents' rooftop projects because of their beautiful appearance and better matching with the color of building roofs.

[0003] At present, the cross-section of the welding ribbon in photovoltaic modules is a standard circle. By covering the surface of the circular welding ribbon with an alloy layer on all sides and then applying a black coating on the outer surface of the alloy layer, not only will the use of the alloy layer increase, but also the cost will also be increased. At the same time, the welding ribbon coated with the black coating will also affect the welding performance of the welding ribbon, which may easily cause the problem of cold soldering in photovoltaic modules and reduce the product yield.

[0004] Therefore, it is urgent to design a photovoltaic welding ribbon and a photovoltaic module to solve the above technical problems. Utility Model Content

[0005] The first purpose of the present utility model is to provide a photovoltaic welding ribbon, which can reduce the usage of the first alloy layer and save costs; at the same time, improve the welding performance of the photovoltaic welding ribbon and improve the product yield.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a photovoltaic welding ribbon, comprising:

[0008] A first section, comprising a first substrate, a first alloy layer and a black coating;

[0009] The first alloy layer is connected to the first substrate, the first alloy layer is located below the first substrate, the first alloy layer and the first substrate together form a peripheral side surface, and the side of the first alloy layer facing away from the first substrate is a bottom surface;

[0010] The black coating is applied to the peripheral side surface, and the bottom surface is configured to be connected to the front surface of the battery cell.

[0011] As an optional technical solution for a photovoltaic welding strip, the photovoltaic welding strip also includes a second section, the second section includes a second substrate and a second alloy layer, the second alloy layer is coated on the second substrate, the first substrate and the second substrate are integrally formed, and the second alloy layer is configured to be connected to the back of the battery cell.

[0012] As an optional technical solution for a photovoltaic welding ribbon, the first segment and the second segment are both provided in plurality, and the first segment and the second segment are alternately provided.

[0013] As an optional technical solution for a photovoltaic welding strip, the photovoltaic welding strip also includes a second segment and a connecting segment, one end of the connecting segment is connected to the first segment, and the other end is connected to the second segment, the second segment has the same structure as the first segment, and the first segment and the second segment are centrally symmetrically arranged about the connecting segment, the bottom surface of the first segment is configured to be connected to the front side of the battery cell, and the bottom surface of the second segment is configured to be connected to the back side of the battery cell.

[0014] As an optional technical solution for a photovoltaic welding ribbon, the connecting section is coated with the black coating, and the connecting section is located between two adjacent solar cells.

[0015] As an optional technical solution for a photovoltaic welding ribbon, the distance between the bottom end of the black coating and the extension line of the bottom surface is H.

[0016] As an optional technical solution for a photovoltaic welding ribbon, the first substrate is circular, the first alloy layer is connected to the first substrate, and the cross-section formed by the first alloy layer and the first substrate is arched;

[0017] Alternatively, the first substrate is arched, and the first alloy layer is connected to the bottom of the first substrate.

[0018] As an optional technical solution for a photovoltaic welding ribbon, the first substrate includes a copper wire, and the first alloy layer includes a tin-lead-bismuth alloy layer or a tin-bismuth-silver alloy layer.

[0019] The second purpose of the present invention is to provide a photovoltaic module, which can reduce the usage of the first alloy layer and save costs; at the same time, improve the welding performance of the photovoltaic welding ribbon and improve the product yield.

[0020] To achieve this purpose, the present invention adopts the following technical solutions:

[0021] The utility model provides a photovoltaic assembly, which comprises a battery cell and the photovoltaic welding strip described in any one of the above technical solutions, wherein the bottom surface of the first segment is connected to the front surface of the battery cell.

[0022] As an optional technical solution for a photovoltaic module, the photovoltaic module also includes a solid glue layer, which includes a first coating part and a second coating part connected to each other, the first coating part is coated on the peripheral side and is located outside the black coating; the second coating part is connected to the battery cell.

[0023] The beneficial effects of the present invention include at least:

[0024] The utility model provides a photovoltaic welding ribbon, comprising a first segment, the first segment comprising a first substrate, a first alloy layer, and a black coating. The first alloy layer is connected to the first substrate and positioned below the first substrate. The first alloy layer and the first substrate together form a peripheral side surface, and the side of the first alloy layer facing away from the first substrate is a bottom surface. The black coating is applied to the peripheral side surface, and the bottom surface is configured to connect to the front surface of a solar cell.

[0025] In the above, by disposing a first alloy layer below the first substrate and applying a black coating to the surrounding side surface formed by the first alloy layer and the first substrate, the bottom surface is connected to the front surface of the battery cell. Since the bottom surface is the first alloy layer and is not coated with the black coating, the welding performance with the battery cell can be improved, reducing or avoiding the risk of cold solder joints, and improving product yield. Furthermore, because the first alloy layer is located below the first substrate, it does not wrap around the copper wire like in the prior art. This reduces the amount of the first alloy layer used, achieving cost savings.

[0026] The utility model provides a photovoltaic component, which can reduce the usage of the first alloy layer and save costs; at the same time, improve the welding performance of the photovoltaic welding strip and increase the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0028] Figure 1 This is a cross-sectional schematic diagram of the photovoltaic welding ribbon provided in Example 1 of the present utility model;

[0029] Figure 2 This is a schematic structural diagram of the photovoltaic welding ribbon provided in the first embodiment of the present invention;

[0030] Figure 3 This is a cross-sectional schematic diagram of the photovoltaic welding ribbon, battery cell and solid adhesive layer provided in the first embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of a photovoltaic module provided in Example 1 of the present utility model;

[0032] Figure 5 This is a cross-sectional schematic diagram of the photovoltaic welding ribbon provided in the second embodiment of the present utility model;

[0033] Figure 6This is a schematic structural diagram of the photovoltaic welding strip provided in the second embodiment of the present invention.

[0034] Reference numerals

[0035] 100, first section; 110, first substrate; 120, first alloy layer; 130, black coating; 140, peripheral side surface; 150, bottom surface;

[0036] 200, second segment; 210, connecting segment;

[0037] 300, battery cell;

[0038] 400, solid adhesive layer; 410, first coating portion; 420, second coating portion;

[0039] 500, front film; 600, back film. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0043] In the description of the present utility model, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0044] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0045] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0046] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0047] Example 1

[0048] This embodiment provides a photovoltaic welding ribbon, which can reduce the usage of the first alloy layer and save costs; at the same time, it improves the welding performance of the photovoltaic welding ribbon and increases the product yield.

[0049] like Figure 1As shown, the photovoltaic ribbon primarily comprises a first segment 100, which includes a first substrate 110, a first alloy layer 120, and a black coating 130. The first alloy layer 120 is connected to and positioned below the first substrate 110. Together, the first alloy layer 120 and the first substrate 110 form a peripheral side surface 140. The side of the first alloy layer 120 facing away from the first substrate 110 forms a bottom surface 150. The black coating 130 is applied to the peripheral side surface 140, and the bottom surface 150 is configured to connect to the front surface of the solar cell 300.

[0050] Based on the above design, in this embodiment, a first alloy layer 120 is provided below the first substrate 110, and a black coating 130 is applied to the peripheral side surface 140 formed by the first alloy layer 120 and the first substrate 110, so that the bottom surface 150 is connected to the front surface of the battery cell 300. In this way, since the bottom surface 150 is the first alloy layer 120 and is not coated with the black coating 130, the welding performance with the battery cell 300 can be improved, the risk of cold welding can be reduced or avoided, and the product yield can be improved. At the same time, since the first alloy layer 120 is located below the first substrate 110, it is not covered around the copper wire as in the prior art, which can reduce the amount of the first alloy layer 120 used, thereby achieving the purpose of cost savings.

[0051] Optionally, the peripheral side surface 140 in this embodiment is arranged in an arched shape. Specifically, as shown in FIG. Figure 1 As shown, the first substrate 110 is circular, the first alloy layer 120 is connected to the first substrate 110, and the cross section formed by the first alloy layer 120 and the first substrate 110 is arched. Of course, the operator can also set the peripheral side surface 140 to other different shapes according to actual needs, which will not be detailed here.

[0052] like Figure 2 As shown, in this embodiment, the photovoltaic welding strip also includes a second section 200, the second section 200 includes a second substrate and a second alloy layer, the second alloy layer is coated on the second substrate, the first substrate 110 and the second substrate are integrally formed, and the second alloy layer is configured to be connected to the back of the battery cell 300.

[0053] The second base body is coated with a second alloy layer, which improves the stability and reliability of the welding between the second alloy layer and the back of the battery cell 300, reducing or avoiding the risk of cold welding. The second segment 200 is not coated with a black coating 130, which further ensures the welding performance between the second segment 200 and the back of the battery cell 300.

[0054] It is understandable that in this embodiment, the peripheral side surface 140 of the first segment 100 is coated with the black coating 130 , while the second segment 200 is not coated with the black coating 130 , so that the photovoltaic ribbon can be applied to single-sided cells 300 .

[0055] Optionally, in this embodiment, the first substrate 110 and the second substrate can both be set as copper wires, and the first alloy layer 120 and the second alloy layer can both be set as tin-lead-bismuth alloy layers or tin-bismuth-silver alloy layers.

[0056] like Figure 2 As shown, in this embodiment, the first segment 100 and the second segment 200 are both provided in plurality, and the first segment 100 and the second segment 200 are alternately provided, thereby completing the series connection of the plurality of battery cells 300 to form a battery string.

[0057] like Figure 1 As shown, in this embodiment, the distance between the bottom end of the black coating 130 and the extension line of the bottom surface 150 is H. The setting of the distance H can minimize the contact between the black coating 130 and the battery cell 300, thereby ensuring the welding performance of the first alloy layer 120 and the battery cell 300 and reducing the risk of cold welding.

[0058] Exemplarily, the distance H can be set to between 0.1 mm and 1.0 mm. For example, the distance H can be set to values ​​such as 0.1 mm, 0.5 mm, and 1.0 mm.

[0059] like Figure 3-Figure 4 As shown, this embodiment also provides a photovoltaic module, characterized in that the photovoltaic module includes a battery cell 300 and the above-mentioned photovoltaic welding ribbon, and the bottom surface 150 of the first section 100 of the photovoltaic welding ribbon is connected to the front surface of the battery cell 300.

[0060] Specifically, the bottom surface 150 of the first section 100 of the photovoltaic ribbon is connected to the front surface of the cell 300, and the second section 200 is connected to the back surface of the cell 300, thereby forming a single-glass black photovoltaic module. It is understood that the cell 300 here is a single-sided cell 300.

[0061] like Figure 3-Figure 4 As shown, the photovoltaic module in this embodiment also includes a solid adhesive layer 400. The solid adhesive layer 400 includes a first coating portion 410 and a second coating portion 420 that are interconnected. The first coating portion 410 is coated on the peripheral side surface 140 and is located outside the black coating 130. The second coating portion 420 is connected to the cell 300. The solid adhesive layer 400 can securely adhere the photovoltaic ribbon to the cell 300, thereby preventing relative displacement between the photovoltaic ribbon and the cell 300 and improving stability. In addition, the provision of the solid adhesive layer 400 can provide a certain degree of protection for the photovoltaic ribbon, reducing or preventing paint peeling and whitening of the photovoltaic ribbon after stretching or friction, and preventing the black coating 130 from falling on the cell 300 and contaminating the photovoltaic module, thereby ensuring the power generation efficiency of the photovoltaic module.

[0062] like Figure 4 As shown, the photovoltaic module further includes a front adhesive film 500 and a back adhesive film 600, the front adhesive film 500 is arranged on the front of the battery cell 300, and the back adhesive film 600 is arranged on the back of the battery cell 300. For example, as Figure 4 As shown, between two adjacent battery cells 300 in a battery string, the front adhesive film 500 of one battery cell 300 is set on the front of the battery cell 300 and covers the first segment 100 of the photovoltaic welding tape, and the back adhesive film 600 of the other battery cell 300 is set on the back of the battery cell 300 and covers the second segment 200 of the photovoltaic welding tape. Then, after the lamination process, the battery cell 300 and the photovoltaic welding tape are interconnected and welded.

[0063] Optionally, the cell 300 in this embodiment can be configured as a busbarless cell.

[0064] Since the photovoltaic module has the photovoltaic welding ribbon, the photovoltaic module can reduce the usage of the first alloy layer 120 and save costs; at the same time, the welding performance of the photovoltaic welding ribbon is improved, thereby increasing the product yield.

[0065] The preparation method of the photovoltaic module in this embodiment is as follows:

[0066] Spraying or brushing black pigment on the photovoltaic ribbon to form a black coating 130;

[0067] The black coating 130 is dried, and then the photovoltaic ribbon is laid on the cell 300;

[0068] Printing a solid adhesive layer 400 on the laid photovoltaic ribbon to bond the photovoltaic ribbon to the cell 300 and fix the photovoltaic ribbon;

[0069] Prepare several battery strings and connect them by welding using black bus bars;

[0070] Lay the back glass or back panel, and seal the edges and laminate them.

[0071] Example 2

[0072] like Figure 5-Figure 6As shown, this embodiment also provides a photovoltaic ribbon. The main difference between this photovoltaic ribbon and the one in the first embodiment is that the photovoltaic ribbon in this embodiment further includes a second segment 200 and a connecting segment 210. The structure of the second segment 200 is different from that in the first embodiment. Specifically, one end of the connecting segment 210 is connected to the first segment 100, and the other end is connected to the second segment 200. The second segment 200 has the same structure as the first segment 100, and the first and second segments 100 and 200 are centrally symmetrically arranged about the connecting segment 210. The bottom surface 150 of the first segment 100 is configured to connect to the front surface of the cell 300, while the bottom surface 150 of the second segment 200 is configured to connect to the back surface of the cell 300. The connecting segment 210 is coated with a black coating 130 and is located between two adjacent cells 300.

[0073] Since the first segment 100 and the second segment 200 of this embodiment have the same structure, but are arranged slightly differently, namely, the first segment 100 and the second segment 200 are arranged centrally and symmetrically about the connecting segment 210, and the connecting segment 210 is also coated with a black coating 130, this allows the bottom of the first segment 100 to connect to the front side of the cell 300, and the bottom of the second segment 200 to connect to the back side of the cell 300. The connecting segment 210 is located between two adjacent cells 300, and thus is suitable for double-glass black photovoltaic modules. It can be understood that the cell 300 in this case is bifacial.

[0074] The connecting segment 210 in this embodiment can be defined as a part of the first segment 100 and a part of the second segment 200 .

[0075] like Figure 5 As shown, the first substrate 110 in this embodiment is arched, and the first alloy layer 120 is connected to the bottom of the first substrate 110. Compared with the structure of the photovoltaic ribbon in Example 1, this can further save the amount of the first alloy layer 120, thereby achieving the purpose of cost saving.

[0076] The remaining structures of the photovoltaic welding strip in this embodiment are the same as those in the first embodiment and will not be described in detail here.

[0077] Obviously, the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

[0078] Note that throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. Throughout this specification, the schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. Photovoltaic welding ribbon, characterized in that, include: A first section (100), comprising a first substrate (110), a first alloy layer (120) and a black coating (130); The first alloy layer (120) is connected to the first substrate (110), the first alloy layer (120) is located below the first substrate (110), the first alloy layer (120) and the first substrate (110) together form a peripheral side surface (140), and the side of the first alloy layer (120) facing away from the first substrate (110) is a bottom surface (150); The black coating (130) is coated on the peripheral side surface (140), and the bottom surface (150) is configured to be connected to the front surface of the battery cell (300).

2. The photovoltaic welding ribbon according to claim 1, characterized in that: The photovoltaic welding strip further includes a second section (200), the second section (200) including a second substrate and a second alloy layer, the second alloy layer is coated on the second substrate, the first substrate (110) and the second substrate are integrally formed, and the second alloy layer is configured to be connected to the back side of the cell (300).

3. The photovoltaic welding ribbon according to claim 2, characterized in that: The first segment body (100) and the second segment body (200) are both provided in plurality, and the first segment body (100) and the second segment body (200) are alternately provided.

4. The photovoltaic welding ribbon according to claim 1, characterized in that: The photovoltaic welding strip further includes a second segment (200) and a connecting segment (210), one end of the connecting segment (210) is connected to the first segment (100), and the other end is connected to the second segment (200), the second segment (200) and the first segment (100) have the same structure, and the first segment (100) and the second segment (200) are centrally symmetrically arranged about the connecting segment (210), the bottom surface (150) of the first segment (100) is configured to be connected to the front side of the battery cell (300), and the bottom surface (150) of the second segment (200) is configured to be connected to the back side of the battery cell (300).

5. The photovoltaic welding ribbon according to claim 4, characterized in that: The connecting section (210) is coated with the black coating (130), and the connecting section (210) is located between two adjacent battery cells (300).

6. The photovoltaic welding ribbon according to any one of claims 1 to 5, characterized in that: The distance between the bottom end of the black coating (130) and the extension line of the bottom surface (150) is H.

7. The photovoltaic welding ribbon according to any one of claims 1 to 5, characterized in that: The first substrate (110) is circular, the first alloy layer (120) is connected to the first substrate (110), and the cross-section formed by the first alloy layer (120) and the first substrate (110) is arched; Alternatively, the first substrate (110) is arched, and the first alloy layer (120) is connected to the bottom of the first substrate (110).

8. The photovoltaic welding ribbon according to any one of claims 1 to 5, characterized in that: The first substrate (110) includes copper wire, and the first alloy layer (120) includes a tin-lead-bismuth alloy layer or a tin-bismuth-silver alloy layer.

9. A photovoltaic module, characterized in that The photovoltaic assembly comprises a cell (300) and a photovoltaic welding strip according to any one of claims 1 to 8, wherein the bottom surface (150) of the first segment (100) is connected to the front surface of the cell (300).

10. The photovoltaic module according to claim 9, characterized in that: The photovoltaic module further comprises a solid glue layer (400), the solid glue layer (400) comprising a first coating portion (410) and a second coating portion (420) connected to each other, the first coating portion (410) being coated on the peripheral side surface (140) and located outside the black coating layer (130); and the second coating portion (420) being connected to the cell sheet (300).

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