Pressing plate device for fixing welding strip

Abstract

The utility model relates to the technical field of photovoltaic cell welding, in particular to a pressing plate device for fixing a welding strip, which comprises a rigid pressing plate and a metal component, the rigid pressing plate is provided with a stress surface and a functional surface; and the metal component is directly or indirectly fixed on the functional surface and is used for directly acting on a welding strip on the surface of the photovoltaic battery piece. According to the utility model, the metal component is arranged on the rigid pressing plate, when the photovoltaic cell is welded, the metal component directly acts on the surface of the welding strip, the contact surface of the metal component and the welding strip is small, the metal component is not easy to stain, and the pollution damage to the surface of the photovoltaic cell is reduced; meanwhile, the metal component also has a certain elastic deformation capability, so that the metal component can be in close contact with the welding strip, the possibility of deformation of the welding strip is reduced, and the welding quality is ensured; and the metal component is long in service life and low in maintenance cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic cell piece welding technical field, especially in kind for the fixed pressure plate device of welding strip. BACKGROUND

[0002] With the continuous progress of photovoltaic cell piece technology, the efficiency of photovoltaic module is improved, and the demand for high-quality welding equipment and materials is promoted. The production of photovoltaic module needs to connect the cell piece through the welding strip, and the process is mainly the welding connection of the welding strip and the cell piece. The welding process requires the welding strip and the cell piece to be closely attached. In the automatic production, specific devices are needed to achieve this purpose in order to fix the position of the welding strip and make the welding strip closely attached to the cell piece at the welding position.

[0003] The existing market adopts a pressure needle carrier, including a pressure plate and a spring pressure needle. The spring pressure needle is fixed on the pressure plate. By placing the pressure needle carrier on the cell piece with the welding strip placed in advance, the spring pressure needle applies pressure to the welding strip and the cell piece, thereby fixing the welding strip on the cell piece and preparing for the subsequent laser or infrared welding process. However, the pressure needle carrier has the following disadvantages:

[0004] First, the pressure needle carrier is easy to deform when released, and the position of the welding strip cannot be effectively controlled, which may cause the welding strip to deviate from the welding position.

[0005] Second, the service life of the spring pressure needle is short, and the pressure needle is easy to deform during mass production, affecting the effect of fixing the welding strip. Under the condition of laser high-temperature welding, the welding strip is easy to stick, directly damaging the photovoltaic cell piece product.

[0006] Third, the number of pressure needles is large, and the light blocking area is large, which may affect the laser welding effect. When the welding strip is welded between the two adjacent pressure needles, it may arch due to thermal expansion and contraction. If the number of pressure needles is small, the effect of fixing the welding strip is not good, the welding strip and the cell piece are not well attached, and the welding quality is also reduced.

[0007] Therefore, the utility model develops a pressure plate device for fixing the welding strip to solve the problems in the prior art. CONTENT OF THE UTILITY MODEL

[0008] The utility model aims to provide a pressure plate device for fixing the welding strip to solve the destructive problems caused by the pressure needle carrier in the prior art, which are reflected in the deformation of the welding strip, the deformation of the spring pressure needle, and the damage to the photovoltaic cell piece.

[0009] The technical scheme of the utility model is: a pressure plate device for fixing the welding strip, comprising:

[0010] A rigid pressure plate has a stress surface and a functional surface.

[0011] A metal member is directly or indirectly fixed on the functional surface and used to directly act on the solder strip on the surface of the photovoltaic cell sheet.

[0012] Preferably, the metal member is connected with the rigid pressing plate through a support.

[0013] Preferably, the support is an elastic support with elastic deformation ability.

[0014] Preferably, the support is configured as a point-like flexible member, and a plurality of the point-like flexible members are distributed in an array on the functional surface.

[0015] The metal member is arranged at the end of the point-like flexible member away from the rigid pressing plate, and the metal member is a continuous metal wire.

[0016] Preferably, the support is configured as a strip-like flexible member, and a plurality of the strip-like flexible members are distributed in parallel on the functional surface.

[0017] The metal member is arranged at the end of each strip-like flexible member away from the rigid pressing plate, and the metal member is a continuous metal wire.

[0018] Preferably, the support is configured as a point-like flexible member, and a plurality of the point-like flexible members are distributed in an array on the functional surface.

[0019] The metal member is arranged at the end of each point-like flexible member away from the rigid pressing plate, and the metal member connected with the point-like flexible member distributed in the same linear direction is configured as a discontinuous metal wire.

[0020] Preferably, the lower end surface of the support is in a concave arc shape, and the outer wall of the metal member is attached and fixed.

[0021] Preferably, the metal member distributed in the same linear direction is perpendicular to the solder strip on the surface of the photovoltaic cell sheet.

[0022] Preferably, the upper end of each metal member has a connecting part embedded in the support.

[0023] Preferably, the outer surface of the metal member is coated with a coating layer for preventing the adhesion of solder paste and welding volatiles.

[0024] Preferably, the end surface of the rigid pressing plate has a plurality of hollowed-out areas.

[0025] Preferably, the rigid pressing plate is in a light-transmitting shape.

[0026] Compared with the prior art, the utility model has the advantages of:

[0027] (1) The utility model discloses a metal component is arranged on rigid pressing plate, and when photovoltaic cell piece is welded, the metal component is directly acted on the surface of solder strip, the contact area of metal component and solder strip is small, and it is not easy to be contaminated, and the pollution damage to the surface of photovoltaic cell piece is reduced, and simultaneously because metal component also has the ability of elastic deformation, can reduce the possibility of deformation of solder strip, guarantee the welding quality, and the service life of metal component is long, and the maintenance cost is low.

[0028] (2) The support between rigid pressing plate and metal component is further added, and the support can be constructed as a point or a strip, and because of the flexible material of the support, the solder strip can be effectively fixed on the photovoltaic cell piece, and the deformation of solder strip due to thermal expansion and cold shrinkage in the welding process is prevented, so that the solder strip is separated from the welding position.

[0029] (3) The outer surface of the metal component is coated with a coating that prevents solder paste and welding volatiles from sticking, ensuring the welding effect and facilitating maintenance. At the same time, by opening a hollow area on the rigid pressing plate, the welding volatiles can be easily discharged, and the hollow area can also effectively avoid the problem of laser blocking during laser welding, without any adverse effects on the welding effect. The setting of the hollow area can also reduce the amount of rigid pressing plate used, reducing production costs. BRIEF DESCRIPTION OF DRAWINGS

[0030] The utility model will be further described in connection with the drawings and examples:

[0031] Figure 1 It is a schematic diagram of the pressing plate device for solder strip fixation described in embodiment 1 of the utility model;

[0032] Figure 2 It is a schematic diagram of the pressing plate device for solder strip fixation described in embodiment 1 of the utility model in the application scenario;

[0033] Figure 3 It is a schematic diagram of the pressing plate device for solder strip fixation described in embodiment 2 of the utility model;

[0034] Figure 4 It is a schematic diagram of the pressing plate device for solder strip fixation described in embodiment 3 of the utility model;

[0035] Figure 5 It is a partial enlarged view of the pressing plate device for solder strip fixation described in embodiment 3 of the utility model;

[0036] Figure 6 It is a schematic diagram of the metal component and the support connected by the connecting part;

[0037] Figure 7 It is a partial enlarged view of the metal component and the support connected by the connecting part.

[0038] 1, rigid pressing plate, 11, force receiving surface, 12, functional surface, 13, hollowed-out area;

[0039] 2, support member, 2a, point-like flexible member, 2b, strip-like flexible member;

[0040] 3, metal member, 31, connecting portion;

[0041] 4, photovoltaic cell;

[0042] 5, solder strip. DETAILED DESCRIPTION

[0043] The content of the present application will be further described in detail below in combination with specific embodiments:

[0044] In order to facilitate understanding, the application scenario of the present application will be described first. The production of photovoltaic modules requires the connection between photovoltaic cell through solder strips. The surface of the photovoltaic cell has grid lines. The solder strip needs to be closely attached to the grid lines on the surface of the photovoltaic cell before welding. Therefore, it needs to be realized through a pressing plate device.

[0045] Embodiment 1

[0046] As shown in Figure 1 A pressing plate device for fixing photovoltaic cells includes a rigid pressing plate 1, a support member 2, and a metal member 3.

[0047] The rigid pressing plate 1 has a force receiving surface 11 and a functional surface 12. The force receiving surface 11 is used to bear the external applied pressure. In the actual application scenario, the force receiving surface 11 is the upper end surface of the rigid pressing plate 1. The functional surface 12 is the lower end surface of the rigid pressing plate 1, which is used to install other functional components. As for the material of the rigid pressing plate 1, glass, polycarbonate (PC), acrylic (acrylic, PMMA), quartz, fluoropolymer (such as PTFE), and various metals or ceramics, etc. high-temperature-resistant rigid materials can be selected. The end surface of the rigid pressing plate 1 has a plurality of hollowed-out areas 13. Since volatile waste gas will be generated during the welding process, the hollowed-out areas 13 can be used to exhaust the waste gas generated during welding, and can also effectively avoid the problem of laser blocking during laser welding, without any adverse effects on the welding effect. At the same time, the setting of the hollowed-out areas 13 can also reduce the amount of the rigid pressing plate 1, thereby reducing the production cost. In order to further facilitate laser welding or laser-induced welding without the phenomenon of light blocking, the rigid pressing plate 1 is made of light-transmitting material, which is light-transmitting, so that the light source can penetrate and directly irradiate the welding area.

[0048] As shown in Figure 1As shown, the support member 2 is installed on the functional surface 12 of the rigid pressure plate 1. The support member 2 is an elastic support member with elastic deformation capability, which can generally be rubber, spring, etc., or a combination of rigid / flexible materials and springs. Of course, in other embodiments, since the metal component 3 itself has a certain deformation capability, the support member 2 can also be made of rigid material directly.

[0049] In this embodiment, the support member 2 is constructed as a dot-shaped flexible member 2a, and multiple dot-shaped flexible members 2a are arranged in an array on the functional surface 12. Since laser welding is generally used when welding photovoltaic cells 4, in order to ensure that the laser can efficiently irradiate the welding strip 5, in this embodiment, the support member 2 can be made of a light-transmitting material, such as polyurethane (PU), polyvinyl alcohol (PVA), polyester (PET), silicone, fluororubber (such as FEP), etc., which are heat-resistant and have good light transmittance.

[0050] Metal component 3 is installed at the end of support 2 away from rigid pressure plate 1, thus achieving an indirect connection between metal component 3 and rigid pressure plate 1. Metal component 3 acts directly on the solder ribbon 5 on the surface of photovoltaic cell 4, ensuring the solder ribbon 5 adheres tightly to the surface of photovoltaic cell 4. In this embodiment, metal component 3 is installed at the end of the dotted flexible components 2a distributed in the same straight direction away from rigid pressure plate 1. Metal component 3 is made of continuous metal wire, and the material can be high-toughness, high-temperature resistant materials such as tungsten carbide or stainless steel. The outer surface of metal component 3 is coated with a coating to prevent solder paste and welding volatiles from adhering, ensuring welding effect and facilitating maintenance. The coating material can be diamond-like carbon (DLC), titanium carbide (TiCN), or similar materials.

[0051] In this embodiment, the metal component 3 is connected to the rigid pressure plate 1 via the support member 2. The support member 2 has a certain degree of flexibility, which can effectively fix the welding strip 5 onto the photovoltaic cell 4, preventing the welding strip 5 from deforming due to thermal expansion and contraction during the welding process and thus detaching from the welding position. Of course, in other embodiments, since the metal component 3 itself has a certain elastic deformation capability, it can make the metal component 3 in close contact with the welding strip 5, reducing the possibility of deformation of the welding strip 5 and ensuring welding quality. Therefore, the metal component 3 can be directly connected to the functional surface 12 of the rigid pressure plate 1.

[0052] like Figure 2 As shown, in the application scenario, the entire pressure plate device acts directly on the welding ribbon 5 on the surface of the photovoltaic cell 4. The metal components 3, distributed in the same straight direction, are perpendicular to the welding ribbon 5 on the surface of the photovoltaic cell 4. The contact area between the metal components 3 and the welding ribbon 5 is small, making it less prone to contamination and reducing pollution damage to the surface of the photovoltaic cell 4. During operation, welding is achieved by irradiating the welding ribbon 5 with a laser. Since waste gas is generated during the welding process, it can be discharged from the hollow area 13 of the rigid pressure plate 1.

[0053] Example 2

[0054] like Figure 3 As shown, a pressure plate device for fixing photovoltaic cells includes a rigid pressure plate 1, a support member 2, and a metal component 3.

[0055] In this embodiment, the support member 2 is constructed as a strip-shaped flexible member 2b, and multiple strip-shaped flexible members 2b are distributed in parallel on the functional surface 12; a metal component 3 is provided at the end of each strip-shaped flexible member 2b away from the rigid pressure plate 1, and the metal component 3 is made of continuous metal wire.

[0056] The only difference between this embodiment and embodiment 1 is the distribution of the support members 2. However, in actual application scenarios, both can effectively enable the metal components 3 to act on the welding strip 5, so that the welding strip 5 and the photovoltaic cell 4 are tightly bonded.

[0057] Example 3

[0058] like Figure 4 As shown, a pressure plate device for fixing photovoltaic cells includes a rigid pressure plate 1, a support member 2, and a metal component 3.

[0059] The support member 2 is constructed as a point-like flexible member 2a, and multiple point-like flexible members 2a are arranged in an array on the functional surface 12; each point-like flexible member 2a is provided with a metal component 3 at the end away from the rigid pressure plate 1, and the metal component 3 connected to the point-like flexible members 2a distributed in the same straight direction is constructed as a discontinuous metal wire.

[0060] Combination Figure 5 As shown, since the outer contour of the metal component 3 is arc-shaped, in order to meet the efficient fixed connection between the metal component 3 and the support 2, the lower end face of the support 2 is set as an inward arc shape, so that the outer wall of the metal component 3 can be attached and bonded for fixation.

[0061] In other implementations, such as Figure 6 , Figure 7 As shown, each metal component 3 has a connecting part 31 at its upper end. The connecting part 31 is embedded in the support member 2 to achieve a fixed connection between the metal component 3 and the support member 2.

[0062] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application, therefore, from any point of view, the examples should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A pressure plate device for fixing welding strips, characterized in that, include: A rigid pressure plate (1) has a force-bearing surface (11) and a functional surface (12); Metal component (3) is directly or indirectly fixed on the functional surface (12) and used to directly act on the welding strip (5) on the surface of the photovoltaic cell (4).

2. The pressure plate device for fixing welding strips according to claim 1, characterized in that: The metal component (3) is connected to the rigid pressure plate (1) via the support member (2).

3. A pressure plate device for fixing welding strips according to claim 2, characterized in that: The support member (2) is an elastic support member with elastic deformation capability.

4. A pressure plate device for fixing welding strips according to claim 2, characterized in that: The support member (2) is constructed as a point-shaped flexible member (2a), and multiple point-shaped flexible members (2a) are arranged in an array on the functional surface (12); The metal component (3) is provided at the end of the point-shaped flexible member (2a) distributed in the same straight direction away from the rigid pressure plate (1), and the metal component (3) is made of continuous metal wire.

5. A pressure plate device for fixing welding strips according to claim 2, characterized in that: The support member (2) is constructed as a strip-shaped flexible member (2b), and multiple strip-shaped flexible members (2b) are distributed in parallel on the functional surface (12); Each of the strip-shaped flexible members (2b) is provided with the metal component (3) at one end away from the rigid pressure plate (1), and the metal component (3) is made of continuous metal wire.

6. A pressure plate device for fixing welding strips according to claim 2, characterized in that: The support member (2) is constructed as a point-shaped flexible member (2a), and multiple point-shaped flexible members (2a) are arranged in an array on the functional surface (12); Each of the point-shaped flexible elements (2a) is provided with a metal component (3) at one end away from the rigid pressure plate (1). The metal component (3) connected to the point-shaped flexible elements (2a) distributed in the same straight direction is constructed as a discontinuous metal wire.

7. A pressure plate device for fixing welding strips according to any one of claims 4-6, characterized in that: The lower end face of the support member (2) is concave arc-shaped, which allows the outer wall of the metal component (3) to be attached and bonded for fixation.

8. A pressure plate device for fixing welding strips according to any one of claims 4-6, characterized in that: The metal components (3) distributed in the same straight direction are perpendicular to the solder strips (5) on the surface of the photovoltaic cell (4).

9. A pressure plate device for fixing welding strips according to claim 6, characterized in that: Each of the metal components (3) has a connecting part (31) at its upper end, the connecting part (31) being embedded in the support member (2).

10. A pressure plate device for fixing welding strips according to any one of claims 4-6, characterized in that: The outer surface of the metal component (3) is coated with a coating to prevent solder paste and welding volatiles from sticking together.

11. A pressure plate device for fixing welding strips according to claim 1, characterized in that: The rigid pressure plate (1) has several hollow areas (13) on its end face.

12. A pressure plate device for fixing welding strips according to claim 1, characterized in that: The rigid pressure plate (1) is translucent.

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