Device for controlling coating of photovoltaic welding strip

Abstract

The utility model discloses a device for controlling a photovoltaic solder strip coating. The device comprises an air knife main body and an air knife bottom cover, the air knife main body and the air knife bottom cover are tightly connected in a matched mode through a connecting assembly, a cavity, an air outlet and a profiling opening are formed through the internal structure of the air knife main body and the internal structure of the air knife bottom cover, and an air inlet is further formed in the device. The air inlet is sequentially communicated with the cavity and the air outlet, the air outlet is communicated with the profiling opening, and the photovoltaic welding strip passes through the profiling opening. Through the design of the utility model, the effects of accurately and effectively controlling the size and smoothness of the tin alloy coating of the welding strip and the like are realized.

Description

Technical Field

[0001] The present invention relates to the field of photovoltaic technology, and in particular to a device for controlling a photovoltaic welding ribbon coating. Background Art

[0002] The welding ribbon is an important raw material in the welding process of photovoltaic modules. It is mainly used to connect the solar cells of photovoltaic modules. The quality of the welding ribbon will affect the current collection efficiency of the photovoltaic module and have a relatively large impact on the power of the photovoltaic module. The production of photovoltaic welding ribbon generally includes two processes: calendering and tin coating. During the tin coating stage, since the existing busbar itself is wide and thin, the coating thickness is uneven, and tin particles will be generated on the surface. The applicant found in actual work that conventional wind knife and other devices have certain technical difficulties and there is a problem that the thickness of the busbar coating cannot be evenly controlled. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a device for controlling the coating of photovoltaic solder strips to solve the technical problems of uneven coating thickness and easy generation of surface tin particles that cannot be solved in the prior art.

[0004] The utility model provides a device for controlling the coating of a photovoltaic welding strip, comprising: a wind knife body and a wind knife bottom cover, wherein the wind knife body and the wind knife bottom cover are tightly connected through a connecting component, and the internal structures of the wind knife body and the wind knife bottom cover are utilized to form a cavity, an air outlet and a profiling port, and the device is also provided with an air inlet, which is connected with the cavity and the air outlet in sequence, and the air outlet leads to the profiling port, and the profiling port is used to pass the photovoltaic welding strip.

[0005] Based on the structural design of the new wind knife device, the thickness of the busbar coating can be effectively and evenly controlled.

[0006] In one of the above embodiments, the air inlet may be arranged on the wind knife body or on the wind knife bottom cover, or may be formed by utilizing the internal structure of the wind knife body and the wind knife bottom cover.

[0007] Furthermore, the wind knife body has a convex structure, and the wind knife bottom cover has a corresponding concave structure, and the convex structure and the concave structure cooperate to form a cavity, an air outlet and a contoured port.

[0008] Furthermore, in the cavity formed by the cooperation of the protruding structure and the recessed structure, the cavity space tends to shrink from the air inlet end to the air outlet end.

[0009] Furthermore, a gap formed by the cooperation between the protruding structure and the recessed structure is an air outlet, and the air outlet leads to the contoured opening.

[0010] In one of the above embodiments, the cavity and the air outlet are both annular.

[0011] In one of the above embodiments, the profiling opening is an ellipse or an irregular shape consisting of half an ellipse and half a rectangle.

[0012] In one of the above embodiments, the connection component is a countersunk screw.

[0013] In one of the above embodiments, the air inlet is connected to a trachea quick-connect connector.

[0014] One or more of the above embodiments of the present invention have at least one or more of the following beneficial effects:

[0015] 1. The structural design of this scheme is reasonable. By cleverly designing the air inlet, the booster chamber, the air outlet, etc., and designing the air outlet in a ring shape, the size of the tin alloy coating of the soldering strip can be accurately and effectively controlled;

[0016] 2. The wind knife and the contoured port design of this solution make the surface of the solder strip after it passes through and cool down smoother than the products produced by other devices, and make the method of adjusting the contoured wind knife simpler and more efficient.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The disclosure of the present invention will become easier to understand with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0019] Figure 1 It is a schematic diagram of the structure of the busbar coating;

[0020] Figure 2 It is a conventional air knife structure in the prior art;

[0021] Figure 3 This is a schematic diagram of the splitting of the wind knife body and the wind knife bottom cover in one embodiment of the utility model;

[0022] Figure 4 It is a schematic diagram of the installation of the wind knife body and the wind knife bottom cover in one embodiment of the utility model;

[0023] Figure 5 yes Figure 2 Bottom view of

[0024] Figure 6 It is a schematic diagram of the airflow direction in one embodiment of the utility model;

[0025] Figure 7 It is a complete working schematic diagram of an embodiment of the utility model;

[0026] Figure 8 It is a schematic diagram of the configuration of the profiling port in another embodiment of the utility model.

[0027] Explanation of the reference numerals: 1-air knife body, 2-air knife bottom cover, 3-countersunk screw, 4-installation positioning hole, 5-air inlet, 6-cavity, 7-air outlet, 8-profiling port, 9-trachea quick connector, 10-welding strip. DETAILED DESCRIPTION

[0028] Some embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0029] like Figure 1 and 2 As shown, the existing busbars in the photovoltaic industry are both wide and thin. For example, when tinning the two relatively wide sides of the busbar, the conventional air knife cannot control the coating on the two sides of the busbar with a smaller width, and it is easy to blow the tin alloy on the two wider sides to both sides, resulting in thicker coating on the sides, and the thickness of the entire busbar coating cannot be evenly controlled.

[0030] The utility model aims to provide a novel device for controlling the coating of photovoltaic solder strips. Based on the structural design of a novel wind knife device, the thickness of the busbar coating can be effectively and evenly controlled to reduce the generation of surface tin particles.

[0031] The present invention will be described in detail below through specific embodiments.

[0032] Example 1

[0033] like Figure 3-5As shown, the device includes two parts: a wind knife body 1 and a wind knife bottom cover 2. The wind knife body 1 and the wind knife bottom cover 2 are tightly connected by countersunk screws 3, and the components of the two parts are locked together, and the internal contact parts have good airtightness. Among them, the wind knife body 1 is also provided with two air inlets 5 and four installation positioning holes 4, and the installation positioning holes 4 fix the device on the adjustable slide. A convex structure is provided inside the wind knife body 1, and a concave structure corresponding to the convex part is provided inside the wind knife bottom cover 2. After the components of the two parts are locked, the convex structure and the concave structure cooperate to form a cavity 6, an air outlet 7 and a contoured port 8.

[0034] In a preferred embodiment, the air inlet 5 can also be arranged on the wind knife bottom cover or formed by utilizing the internal structure of the wind knife body 1 and the wind knife bottom cover 2 .

[0035] In a preferred embodiment, the interior of the wind knife body 1 is configured as a recessed structure, and the interior of the wind knife bottom cover 2 is configured as a raised structure, and the two parts are then locked.

[0036] In a preferred embodiment, the interior of the wind knife body 1 and the wind knife bottom cover 2 can also be respectively provided with mutually matching concave and convex structures, thereby locking the two parts to form the air inlet, cavity and air outlet structures in Example 1.

[0037] Depend on Figure 4 It can be seen that for the cavity 6 formed by the cooperation of the convex structure and the concave structure, the cross-sectional area of ​​the cavity 6 tends to decrease from the air inlet 5 end to the air outlet 7 end, and the air therein also tends to decrease accordingly. The purpose is to allow the gas to enter from the large port and exit from the small port, thereby forming a pressurized effect.

[0038] Preferably, the cross-sectional area of ​​the raised portion of the edge of the raised structure decreases gradually from the raised base to the raised head.

[0039] The air outlet 7 is formed by a certain gap formed by the convex head part of the convex structure and the concave structure. In the present embodiment, it is located at the lower part of the cavity 6 and is connected with the cavity 6. The airflow in the cavity 6 is transported to the contoured port 8 through the air outlet 7.

[0040] As for the contoured port 8, in the present embodiment, the middle parts of the wind knife body 1 and the wind knife bottom cover 2 are pre-set with corresponding shapes. After the two components are locked, the heads of the corresponding raised parts and the roots of the recessed parts cooperate to form a complete contoured port 8. One end of the air outlet 7 has an opening in the contoured port for conveying the airflow into the contoured port.

[0041] Figure 6The airflow direction in an embodiment of the utility model is shown. It can be seen from the figure that after the wind knife body 1 and the wind knife bottom cover 2 are locked, the airflow passes through the air inlet 5 in the wind knife body 1 and then enters the cavity 6. The airflow is pressurized by utilizing the structural characteristics in the cavity 6, and then enters the contoured port 8 through the air outlet 7. It can be seen from the figure that the edge of the convex structure in the wind knife body 1 and the concave structure of the wind knife bottom cover 2 cooperate to form a cavity, and the edge of the convex structure is designed in a wavy shape, and preferably can also be designed in a plane consistent with the surface of the concave structure, and finally connected with the air outlet 7 in a pointed shape.

[0042] Preferably, the structure of the cavity 6 and the air outlet 7 are both configured as an annular structure.

[0043] By adopting the technical solution of the present application, the surface of the solder strip after cooling is smoother than that of products produced by other devices, and the method of adjusting the contoured air knife is simpler and more efficient, and it is sufficient to ensure that the solder strip is centered at the center of the air knife. Since the present application adopts a design corresponding to the cross-sectional profile of the solder strip, there is no dead angle when the air knife is working, and each angle of the solder strip can be affected by the same wind pressure, which can ensure the consistency of the product coating.

[0044] In a preferred embodiment, the 0.3*4 mm welding strip used in the embodiment of the present application uses an air knife with a diameter of 3.3*7 mm.

[0045] Figure 7 It is a complete working diagram of an embodiment of the utility model, which is provided with an air pipe quick-plug connector 9, which is used to connect the required compressed gas to flow into the cavity 6 through the air inlet 6 for pressurization, and the air flow releases the pressurized gas from the air outlet 7 to blow the tin alloy liquid on the surface of the welding strip 10 passing through the profiling port 8 along the specified direction to the tin furnace or other containers.

[0046] By adopting the structure of the embodiment of the utility model, since all positions of the soldering strip can be taken into account, the tin alloy liquid on the surface of all soldering strips passing through the device is cooled and has a smooth appearance, which can reduce a lot of tin particles, and the adjustment of the contoured wind knife is simpler and easier to use.

[0047] In one embodiment of the present invention, the contoured opening 8 can be configured to be elliptical.

[0048] Preferably, Figure 8 As shown, it can also be formed by an irregular figure consisting of half an ellipse and half a rectangle. The design purpose is to make it easier for welding strips of different product shapes to pass through, and at the same time, it can produce a better control effect on the coating thickness and smoothness for products of these shapes.

[0049] In other embodiments of the utility model, the setting of the contoured port is not limited to the shape structure mentioned in the embodiments of the present application, and can be changed accordingly based on the shape of the welding strip. Based on the design of the annular air outlet mentioned in the present application, its purpose is to accurately and effectively control the size of the tin alloy coating of the welding strip, and to ensure that each surface and each angle of the welding strip can be affected by the wind knife.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A device for controlling the coating of a photovoltaic ribbon, characterized in that: It includes a wind knife body and a wind knife bottom cover, wherein the wind knife body and the wind knife bottom cover are tightly connected through a connecting component, and the internal structures of the wind knife body and the wind knife bottom cover are utilized to form a cavity, an air outlet and a contour port. The device is also provided with an air inlet, which is connected with the cavity and the air outlet in turn, and the air outlet leads to the contour port, and the contour port is used to pass the photovoltaic welding strip.

2. The device according to claim 1, characterized in that The air inlet may be arranged on the wind knife body or on the wind knife bottom cover, or may be formed by utilizing the internal structure of the wind knife body and the wind knife bottom cover.

3. The device according to claim 2, characterized in that The wind knife body has a convex structure, and the wind knife bottom cover has a corresponding concave structure. The convex structure and the concave structure cooperate to form a cavity, an air outlet and a contoured port.

4. The device according to claim 3, characterized in that In the cavity formed by the cooperation of the protruding structure and the recessed structure, the cavity space tends to shrink from the air inlet end to the air outlet end.

5. The device according to claim 4, characterized in that The gap formed by the cooperation between the convex structure and the concave structure is an air outlet, and the air outlet leads to the contour opening.

6. The device according to any one of claims 1 to 5, characterized in that The cavity and the air outlet are both annular.

7. The device according to any one of claims 1 to 5, characterized in that The profiling opening is an ellipse or an irregular shape consisting of half an ellipse and half a rectangle.

8. The device according to any one of claims 1 to 5, characterized in that The connecting component is a countersunk screw.

9. The device according to any one of claims 1 to 5, characterized in that: The air inlet is connected to a trachea quick-connect connector.

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