Photovoltaic soldering strip

Abstract

The utility model provides a kind of photovoltaic welding strip, it is related to solar module technical field, photovoltaic welding strip includes welding strip body and the conductive coating being set on welding strip body, the conductive coating on welding strip body is used to connect with the fine grid of battery piece body, and the conductive coating is located on the side of the side of welding strip body and battery piece body contact side.The conductive coating is arranged on the contact side of welding strip body and battery piece body, and the conductive connection of welding strip and battery piece can be directly heated, the material cost of welding strip is reduced, the production process is simplified, and the yield of product is improved, effectively solve the technical problems existing in prior art.

Description

Technical Field

[0001] This utility model relates to the field of solar module technology, and in particular to a photovoltaic welding strip. Background Technology

[0002] A solar cell is a thin film of photoelectric semiconductors that generates electricity directly using sunlight. It is also known as a "solar chip" or "photovoltaic cell". As long as the illuminance conditions are met, it can output voltage and generate current instantly when there is a circuit. In physics, it is called solar photovoltaic (PV).

[0003] Currently, existing photovoltaic welding strips are wrapped with a welding coating, and metallization welding is achieved through heating, resulting in high material costs for the welding strips.

[0004] Therefore, the aforementioned technical issues still need further resolution. Utility Model Content

[0005] The purpose of this invention is to provide a photovoltaic welding ribbon to alleviate the technical problems existing in the aforementioned related technologies.

[0006] This utility model provides a photovoltaic welding ribbon, comprising: The solder ribbon body and the conductive coating disposed on the solder ribbon body, wherein the conductive coating on the solder ribbon body is used to connect with the fine grid of the battery cell body, and the conductive coating is located on the side of the solder ribbon body that is in contact with the battery cell body.

[0007] The purpose of this application and the technical problems to be solved can also be further achieved by the following technical measures.

[0008] Optionally, in the aforementioned photovoltaic ribbon, the radial cross-sectional shape of the ribbon body is either circular or polygonal.

[0009] Optionally, in the aforementioned photovoltaic ribbon, the polygon is one of a triangle, a quadrilateral, or a pentagon.

[0010] Optionally, the aforementioned photovoltaic welding strip further includes: An anti-oxidation layer is applied to wrap the solder ribbon body. The conductive coating is located on the side of the anti-oxidation layer that is in contact with the battery cell body.

[0011] Optionally, in the aforementioned photovoltaic ribbon, the anti-oxidation layer is made of silver, aluminum, tin-bismuth-silver alloy, silver-aluminum alloy, tin-lead-bismuth alloy, or tin-silver-copper alloy.

[0012] Optionally, the aforementioned photovoltaic ribbon is wherein the ribbon body is made of copper.

[0013] Optionally, in the aforementioned photovoltaic ribbon, the conductive coating is prepared using a thermoplastic conductive adhesive.

[0014] Optionally, in the aforementioned photovoltaic ribbon, the cross-sectional shape of the ribbon body along the radial direction is circular; The arc of the conductive coating is 10°-180°.

[0015] Optionally, in the aforementioned photovoltaic ribbon, the cross-sectional shape of the ribbon body along the radial direction is a polygon; Wherein, the polygon is an equilateral polygon, and the ratio of one side length of the polygon to the length of the conductive coating is 0.1-1.

[0016] Optionally, in the aforementioned photovoltaic ribbon, the thermoplastic conductive adhesive has a matrix and conductive particles; The matrix is ​​made of polyolefin, the conductive particles are metal powder, the metal powder is one of copper, nickel or silver, and the diameter of the conductive particles is 1-20µm.

[0017] By employing the above technical solution, the photovoltaic welding strip of this application has at least the following advantages: The photovoltaic welding ribbon provided in this application embodiment has a conductive coating on the contact side between the welding ribbon body and the cell body. By reducing the thickness of the oxide layer and adding a layer of thermoplastic conductive adhesive material, the welding ribbon and the cell can be directly heated to achieve conductive connection, which reduces the material cost of the welding ribbon, simplifies the production process, and improves the product yield. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a photovoltaic welding strip with a circular radial cross-sectional shape provided for an embodiment of this utility model; Figure 2 A schematic diagram of a photovoltaic welding strip with a triangular radial cross-sectional shape provided for an embodiment of this utility model; Figure 3 A schematic diagram of a photovoltaic welding strip with a quadrilateral radial cross-sectional shape provided for an embodiment of this utility model; Figure 4 This is a schematic diagram of a photovoltaic welding strip with a pentagonal radial cross-sectional shape, provided for an embodiment of the present invention.

[0020] icon: 1. Solder strip substrate; 2. Conductive coating; 3. Anti-oxidation layer. Detailed Implementation

[0021] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example like Figures 1-4 As shown, the photovoltaic welding ribbon proposed in the embodiments of this utility model includes: The welding ribbon body and the conductive coating 2 disposed on the welding ribbon body, the conductive coating 2 on the welding ribbon body is used to connect with the fine grid of the battery cell body, and the conductive coating 2 is located on the side of the welding ribbon body that is in contact with the battery cell body.

[0025] Specifically, the solder ribbon is used to connect the photovoltaic module cells, playing a crucial role in conductivity and electrostatic concentration. A conductive coating 2 is applied to the contact side between the solder ribbon and the cell. By reducing the thickness of the oxide layer and adding a layer of thermoplastic conductive adhesive, direct heating is possible to achieve a conductive connection between the solder ribbon and the cell, reducing the material cost of the solder ribbon, simplifying the production process, and improving product yield. Furthermore, it significantly saves material costs and avoids excessive material waste.

[0026] like Figures 1-4 As shown, in a specific implementation, the radial cross-sectional shape of the welding strip body is either circular or polygonal.

[0027] Specifically, this structural design allows technicians to select the shape of the solder strip body according to actual needs, thereby improving the overall conductivity of the device.

[0028] like Figures 2-4 As shown, in a specific implementation, the polygon is one of a triangle, a quadrilateral, or a pentagon.

[0029] Specifically, the polygonal design increases the contact area between the conductive coating 2 and the battery cell body, thereby improving the overall conductivity and electrical connection of the device.

[0030] like Figures 1-4 As shown, in specific implementation, it also includes: Anti-oxidation layer 3 wraps around the solder ribbon body; The conductive coating 2 is located on the side of the anti-oxidation layer 3 that is in contact with the battery cell body.

[0031] Specifically, this structural design can improve the electrical conductivity of the device and enhance its oxidation resistance.

[0032] In specific implementation, the anti-oxidation layer 3 is made of silver, aluminum, tin-bismuth-silver alloy, silver-aluminum alloy, tin-lead-bismuth alloy or tin-silver-copper alloy.

[0033] In specific implementation, the welding strip body is made of copper material.

[0034] Specifically, the welding strip body is made of copper, which possesses excellent electrical conductivity, corrosion resistance, and economic benefits. Furthermore, copper welding strips offer the advantage of strong welds. Copper's superior electrical conductivity makes copper welding strips perform exceptionally well in electrical connections, ensuring smooth current transmission, reducing energy loss, and improving equipment operating efficiency. In addition, copper welding strips perform excellently during the welding process, ensuring strong welds and avoiding incomplete or false welds, thereby improving the power and efficiency of photovoltaic modules. Secondly, copper welding strips have good corrosion resistance, extending the service life of equipment. Copper is relatively stable in the natural environment and is not easily oxidized, which reduces the frequency of maintenance and replacement during use, lowering long-term operating costs. Finally, copper welding strips have high economic value. Copper is a common metal material with relatively stable prices and easy availability, giving copper welding strips an advantage in production and maintenance costs.

[0035] In a specific implementation, the conductive coating 2 is prepared using a thermoplastic conductive adhesive.

[0036] Specifically, thermoplastic conductive adhesives offer excellent static conductivity, acting as a protective energy absorption layer. Thermoplastic conductive adhesives are simple to process (the preparation and processing of thermoplastic conductive adhesives are relatively simple, easily automated, and reduce production costs), reusable (the base resin molecules of thermoplastic conductive adhesives have long molecular chains and few branches, resulting in good fluidity during high-temperature curing, thus allowing for reuse), and also possess good heat resistance (the good fluidity during high-temperature curing allows them to withstand higher operating temperatures and exhibits good heat resistance).

[0037] like Figure 1 As shown, in a specific implementation, the cross-sectional shape of the welding strip body along the radial direction is circular; The arc of the conductive coating 2 is 10°-180°.

[0038] Specifically, when technicians use a welding strip body with a circular cross-sectional shape, the curvature of the conductive coating 2 is 10°-180°. Technicians can select the curvature of the conductive coating 2 according to actual needs to improve the overall conductivity of the device.

[0039] like Figures 2-4 As shown, in a specific implementation, the cross-sectional shape of the welding strip body along the radial direction is a polygon; The polygon is an equilateral polygon, and the ratio of one side length of the polygon to the length of the conductive coating 2 is 0.1-1.

[0040] Specifically, when technicians use a welding strip body with a polygonal cross-sectional shape, the ratio of the length of the conductive coating 2 to the length of one side of the polygon is 0.1-1. Technicians can select the curvature of the conductive coating 2 according to actual needs to improve the overall conductivity of the device.

[0041] In a specific implementation, the thermoplastic conductive adhesive has a matrix and conductive particles; The matrix is ​​made of polyolefin, the conductive particles are metal powder, the metal powder is one of copper, nickel or silver, and the diameter of the conductive particles is 1-20µm.

[0042] Specifically, thermoplastic conductive adhesives mainly consist of a resin matrix, conductive particles, dispersing additives, and auxiliaries. The resin matrix primarily includes epoxy resin, acrylate resin, and polyurethane. After curing, these resin matrices form the molecular framework structure of the conductive adhesive, providing mechanical and adhesive properties, and enabling the conductive filler particles to conduct electricity.

[0043] Conductive particles are typically metal powders, such as powders of gold, silver, copper, aluminum, zinc, iron, and nickel, as well as graphite and some conductive compounds. These conductive particles need to have good conductivity and their particle size needs to be within a suitable range so that they can be added to the conductive adhesive matrix to form conductive pathways.

[0044] Dispersing additives and auxiliaries are used to improve the performance and processability of conductive adhesives. For example, when carbon black is used as a conductive filler, it needs to be ball-milled to improve its dispersibility and conductivity in the resin. Other auxiliaries include curing agents, diluents, and plasticizers, which are used to adjust the curing speed, viscosity, and other physicochemical properties of the conductive adhesive.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A photovoltaic welding strip, characterized in that, include: The solder ribbon body and the conductive coating disposed on the solder ribbon body, wherein the conductive coating on the solder ribbon body is used to connect with the fine grid of the battery cell body, and the conductive coating is located on the side of the solder ribbon body that is in contact with the battery cell body.

2. The photovoltaic welding strip according to claim 1, characterized in that, The cross-sectional shape of the welding strip body along the radial direction is either circular or polygonal.

3. The photovoltaic welding strip according to claim 2, characterized in that, The polygon is one of a triangle, a quadrilateral, or a pentagon.

4. The photovoltaic welding strip according to claim 1 or 3, characterized in that, Also includes: An anti-oxidation layer is applied to wrap the solder ribbon body. The conductive coating is located on the side of the anti-oxidation layer that is in contact with the battery cell body.

5. The photovoltaic welding strip according to claim 4, characterized in that, The anti-oxidation layer is made of silver, aluminum, tin-bismuth-silver alloy, silver-aluminum alloy, tin-lead-bismuth alloy, or tin-silver-copper alloy.

6. The photovoltaic welding strip according to claim 1, characterized in that, The welding strip body is made of copper.

7. The photovoltaic welding strip according to claim 1, characterized in that, The conductive coating is prepared using thermoplastic conductive adhesive.

8. The photovoltaic welding strip according to claim 2, characterized in that, The cross-sectional shape of the welding strip body along the radial direction is circular; The arc of the conductive coating is 10°-180°.

9. The photovoltaic welding strip according to claim 3, characterized in that, The cross-sectional shape of the welding strip body along the radial direction is a polygon; The polygon is an equilateral polygon, and the ratio of one side length of the polygon to the length of the conductive coating is 0.1-1.

10. The photovoltaic welding strip according to claim 7, characterized in that, The thermoplastic conductive adhesive has a matrix and conductive particles; The matrix is ​​made of polyolefin, the conductive particles are metal powder, the metal powder is one of copper, nickel or silver, and the diameter of the conductive particles is 1-20µm.

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