High-conductivity photovoltaic solder strip

Abstract

The utility model relates to the technical field of photovoltaic accessories, in particular to a high-conductivity photovoltaic solder strip, which comprises an upper solder strip and a lower solder strip, the upper solder strip and the lower solder strip are fixedly connected through integral forming, two ends of the upper solder strip and the lower solder strip are fixedly connected with welding heads, one side of the upper solder strip, which is far away from the lower solder strip, is provided with a concave groove, and the concave groove is communicated with the concave groove. Protruding blocks are fixedly connected to the outer walls of the two opposite sides of the welding head, and a layer of reflecting particles is arranged on the inner groove wall of the concave groove. According to the high-conductivity photovoltaic welding strip provided by the utility model, the photovoltaic welding strip is arranged into two layers, and conductive components are added into the conductive welding strip at the bottom layer, so that the efficiency of the process of conveying electric energy from one end to the other end can be improved regardless of the welding length of the welding strip, and the conductivity of the welding strip is further improved; the requirement for high conductivity of the solder strip is met, light is reflected in the sunken groove, the part of light is refracted to a photovoltaic panel of the photovoltaic module for photovoltaic absorption, efficient utilization of photovoltaic energy is improved, and waste of photovoltaic resources is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic accessories, in particular to a high-conductivity photovoltaic welding strip. Background Art

[0002] Photovoltaic welding ribbon is an important component of photovoltaic modules and is mainly used for connection in photovoltaic cells. Photovoltaic welding ribbon is an important raw material in the welding process of photovoltaic modules. Its quality will directly affect the current collection efficiency of photovoltaic modules and have a great impact on the power of photovoltaic modules. It is an electrical connection component and is used for series or parallel connection of photovoltaic cells. It plays an important role in conductive collection to improve the output voltage and power of photovoltaic modules.

[0003] The current photovoltaic welding ribbon is composed of a single layer of tin and copper, and the electrical conductivity of tin is poor, which makes the current photovoltaic welding ribbon have poor electrical conductivity, affecting the efficiency of the photovoltaic welding ribbon for power transmission. In addition, since the surface of the current welding ribbon is generally a flat surface, the sunlight shining on the surface of the welding ribbon is directly reflected, and the shining light cannot be effectively reflected onto the photovoltaic panel. This part of the energy cannot be effectively utilized, which not only causes a waste of resources. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a high-conductivity photovoltaic welding ribbon, which has the advantage of improving the conductivity of the welding ribbon, and solves the problem that the current photovoltaic welding ribbon is composed of a single layer of tin and copper, and the conductivity of tin is poor, which makes the current photovoltaic welding ribbon have poor conductivity and affects the efficiency of the photovoltaic welding ribbon for power transmission.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions, a technical solution adopted by a high-conductivity photovoltaic welding strip is: it includes an upper welding strip and a lower welding strip, the upper welding strip and the lower welding strip are fixedly connected by integral molding, both ends of the upper welding strip and the lower welding strip are fixedly connected with welding heads, a recessed groove is provided on the side of the upper welding strip away from the lower welding strip, and bumps are fixedly connected to the outer walls on opposite sides of the welding head, and a layer of reflective particles is provided on the inner wall of the recessed groove.

[0008] As a preferred solution, the cross section of the recessed groove is V-shaped, and the groove body angle of the recessed groove is 20°-40°.

[0009] As a preferred solution, the convex block is arranged in the form of a rectangular convex cone, and a plurality of the convex blocks are provided and are evenly distributed in an array.

[0010] As a preferred solution, the thickness of the lower welding strip is 6 μm-9 μm, and the thickness of the upper welding strip (1) is 10 μm-16 μm.

[0011] As a preferred solution, the groove depth of the concave groove is 5 μm-9 μm.

[0012] As a preferred solution, the material composition of the lower welding strip includes 35wt% copper, 50wt% aluminum, and 15wt% silver.

[0013] As a preferred solution, the width of the concave groove is 5 μm-8 μm.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a high-conductivity photovoltaic welding strip, which has the following beneficial effects.

[0016] 1. This kind of high-conductivity photovoltaic welding strip is divided into two layers, wherein the bottom conductive welding strip is added with a conductive component, so that no matter how long the welding strip is, the efficiency of transmitting electrical energy from one end to the other end can be improved, so that the conductive performance of the welding strip is further improved, and the demand for high conductivity of the welding strip is met.

[0017] 2. This kind of high-conductivity photovoltaic welding strip has multiple recessed grooves on its surface. The recessed grooves are used to refract light so that when the light hits the welding strip, it will not be directly reflected back to its original direction, but will be reflected in the recessed grooves. This part of the light will then be refracted onto the photovoltaic panel of the photovoltaic module for photovoltaic absorption, thereby improving the efficient use of photovoltaic energy and reducing the waste of photovoltaic resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional schematic diagram of the welding strip structure of the utility model;

[0019] Figure 2 It is a three-dimensional schematic diagram of the upper welding strip and the lower welding strip structure of the utility model;

[0020] Figure 3 It is a three-dimensional schematic diagram of the welding head structure of the utility model;

[0021] Figure 4 For this utility model Figure 2 A schematic diagram of the enlarged structure at point A;

[0022] Figure 5 For this utility model Figure 3 Schematic diagram of the enlarged structure at B.

[0023] In the figure: 1. upper welding strip; 2. lower welding strip; 3. welding head; 4. recessed groove; 5. bump; 6. reflective particles. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0025] Embodiment 1

[0026] See also Figure 1-5 The utility model discloses a high-conductivity photovoltaic welding strip, comprising an upper welding strip 1 and a lower welding strip 2. The upper welding strip 1 and the lower welding strip 2 are fixedly connected by integral molding. The two ends of the upper welding strip 1 and the lower welding strip 2 are fixedly connected with welding heads 3. A recessed groove 4 is provided on the side of the upper welding strip 1 away from the lower welding strip 2. The outer walls on the opposite sides of the welding head 3 are fixedly connected with protrusions 5. The welding head 3 and the connection position of the welding strip are inclined surfaces, and the front end is flat and a protrusion 5 is arranged on its surface. The thickness of the welding head 3 is less than the thickness of the welding strip. In the process of welding with the photovoltaic module, the problem of excessive welding stress caused by the same thickness as the welding strip can be reduced, and the stability of welding can be improved. The protrusion 5 can melt during welding to provide welding strength at the connection position with the photovoltaic module, further improving the stability of welding. A layer of reflective particles 6 is provided on the inner groove wall of the recessed groove 4. The reflective particles 6 are reflective glass particles with a smooth surface, which can better and faster reflect light to the photovoltaic module, thereby reducing the waste of resources and improving the utilization rate.

[0027] The cross section of the concave groove 4 is V-shaped, and the V-shaped concave groove 4 can better reflect the light, so that the light will not be reflected out. By setting the angle, most of the light can be reflected to the photovoltaic module to generate electricity, thereby improving the utilization of photovoltaic energy. The groove body angle of the concave groove 4 is 20°-40°, and the convex block 5 is set in a rectangular convex cone. There are several convex blocks 5, and they are evenly distributed in an array. Several convex blocks 5 are evenly distributed. During welding, these convex blocks 5 melt and expand a welding layer, which can better connect with the photovoltaic module. The convex block 5 is made of conductive material, which ensures the transmission of electric energy after welding. The thickness of the lower welding strip 2 is 6μm-9μm, and the thickness of the upper welding strip 1 is 10 μm-16μm, the groove depth of the recessed groove 4 is 5μm-9μm, and the width of the recessed groove 4 is 5μm-8μm. The recessed groove 4 is opened on the surface of the upper welding strip 1, so that the light irradiated on the surface of the welding strip can be better reflected to the photovoltaic module for energy collection, thereby reducing the waste of resources and improving the utilization rate of photovoltaics. The material composition of the lower welding strip 2 includes 35wt% copper, 30wt% tin, 20wt% aluminum, and 15wt% silver. Adding aluminum and silver with stronger conductivity to the inside of the lower welding strip 2 of the welding strip to form an alloy can effectively improve the conductivity of the welding strip, so that the welding strip can more efficiently and stably transmit the electric energy generated by the photovoltaic module to the photovoltaic cell for storage, so that the welding strip has high conductivity.

[0028] The working principle of the utility model is: when in use, the upper welding strip 1 and the lower welding strip 2 of the photovoltaic welding strip are integrated, and then the photovoltaic module and the battery are connected through the welding head 3. During the welding process, the surface protrusion 5 of the welding head 3 melts during welding, and can be better welded and fixed with the photovoltaic module, thereby improving the stability of welding. Afterwards, when the photovoltaic device is used, the light is projected into the concave groove 4 on the surface of the upper welding strip 1, and the light is reflected inside the concave groove 4, and the reflection path of the light is further changed through the reflective particles 6, so that this part of the light is reflected onto the photovoltaic panel as much as possible for photovoltaic absorption, thereby improving the utilization rate of the light and improving the resource utilization of the photovoltaic module.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.

Claims

1. A high-conductivity photovoltaic welding ribbon, comprising an upper welding ribbon (1) and a lower welding ribbon (2), characterized in that: The upper welding strip (1) and the lower welding strip (2) are fixedly connected by integral molding; welding heads (3) are fixedly connected at both ends of the upper welding strip (1) and the lower welding strip (2); a concave groove (4) is provided on a side of the upper welding strip (1) away from the lower welding strip (2); protrusions (5) are fixedly connected to the outer walls on opposite sides of the welding head (3); and a layer of reflective particles (6) is provided on the inner groove wall of the concave groove (4).

2. A high conductivity photovoltaic ribbon according to claim 1, characterized in that: The cross section of the recessed groove (4) is V-shaped, and the groove body angle of the recessed groove (4) is 20°-40°.

3. A high conductivity photovoltaic ribbon according to claim 1, characterized in that: The convex block (5) is arranged in the form of a rectangular convex cone, and a plurality of the convex blocks (5) are provided and are evenly distributed in an array.

4. A high-conductivity photovoltaic welding ribbon according to claim 1, characterized in that: The thickness of the lower welding strip (2) is 6 μm-9 μm, and the thickness of the upper welding strip (1) is 10 μm-16 μm.

5. The high-conductivity photovoltaic ribbon according to claim 1, characterized in that: The groove depth of the concave groove (4) is 5 μm-9 μm.

6. A high-conductivity photovoltaic welding ribbon according to claim 1, characterized in that: The width of the concave groove (4) is 5 μm-8 μm.

Images