Welding tool for back contact solar cell module

Abstract

The welding tool for the back contact solar cell module comprises a plurality of frame structures, each frame structure comprises a main beam, a plurality of supporting rods are detachably connected to the two sides of each main beam, a plurality of connectors are detachably connected to the supporting rods, pressing block assemblies are installed on the connectors, the connectors and the main beams are arranged in parallel, and the pressing block assemblies are arranged on the main beams. According to the utility model, the plurality of frame structures are arranged in parallel and pressed downwards, so that single-type welding strips on the surface of the back contact solar cell module can be welded, welding of other types of welding strips is not influenced, and the plurality of frame structures are arranged in a crossed manner and pressed downwards, so that all welding strips on the surface of the back contact solar cell module can be welded; and the interconnection efficiency of the back contact solar cell assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cell production, in particular to a welding tool for back-contact solar cell components. Background Art

[0002] Back-contact solar cells are designed with both the positive and negative electrodes located on the back of the cell, interconnected by solder ribbons. Back-contact solar cells not only completely eliminate light shading losses from the front-facing grid electrodes, but also maximize the use of incident light, minimizing optical losses, increasing effective power generation area, improving conversion efficiency, and also offering a more aesthetically pleasing appearance.

[0003] like Figure 1 As shown, in the process of interconnecting the welding ribbons of the back-contact solar cell module, since the positive and negative electrodes of the back-contact solar cell are arranged alternately, the corresponding positive and negative electrode welding ribbons need to be placed and welded step by step to electrically connect the adjacent back-contact solar cell cells. In the prior art, such as application No. 201621171369X, entitled "A Secondary Pick-up and Placement Mechanism for Solar Cell Welding Ribbons", the holding mechanism is a whole piece, which will block the negative electrode welding ribbon when welding the positive electrode welding ribbon, affecting the step-by-step placement and welding of the positive and negative electrode welding ribbons.

[0004] Based on this, a welding tool for back-contact solar cell modules is designed, which can solve the problem of mutual interference between positive and negative electrode welding strips during placement, promote the production of back-contact solar cell modules, and improve welding quality. Utility Model Content

[0005] The present invention aims to overcome the defects in the above-mentioned prior art and provide a welding tool for back-contact solar cell modules, which can solve the problem of mutual interference when the positive and negative electrode welding strips are placed, promote the production of back-contact solar cell modules, and improve the welding quality.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a welding tool for back-contact solar cell modules, including several frame structures, the frame structure includes a main beam, several support rods are detachably connected on both sides of the main beam, several connecting heads are detachably connected on the support rods, and a pressure block assembly is installed on the connecting head, and the connecting head and the main beam are arranged parallel to each other.

[0007] As a preferred solution of the present invention, an installation space is formed between adjacent support rods, and at least one support rod can be placed in the installation space.

[0008] As a preferred solution of the present invention, adjacent frame structures are arranged in parallel or cross-arranged through support rods.

[0009] As a preferred solution of the present invention, the support rod is arranged perpendicular to the main beam.

[0010] As a preferred solution of the present invention, the connector includes a connecting portion, one end of the connecting portion is connected to the support rod, the other end of the connecting portion is connected to the mounting portion, and a circular hole is formed in the middle of the mounting portion.

[0011] As a preferred solution of the present invention, the pressing block assembly includes a pressing block, an elastic member and a limiting member. The limiting member is arranged at the upper end of the pressing block to limit the pressing block downward.

[0012] As a preferred solution of the present invention, the pressing block includes a long axis, the long axis passes through the circular hole, and the bottom of the long axis forms a pressing piece.

[0013] As a preferred solution of the present invention, the elastic member is located between the pressing member and the mounting portion.

[0014] As a preferred solution of the present invention, a notch is formed in the middle of the bottom of the pressing piece.

[0015] As a preferred solution of the present invention, a stopper is included, and the stopper is located between the elastic member and the mounting portion.

[0016] The beneficial effects of the utility model are:

[0017] 1. In the present invention, multiple frame structures are arranged in parallel and pressed down to achieve welding of a single type of welding ribbon on the surface of the back-contact solar cell module without affecting the welding of other types of welding ribbons. Multiple frame structures are arranged crosswise and pressed down in sequence to achieve welding of all welding ribbons on the surface of the back-contact solar cell module, thereby improving the efficiency of interconnection of the back-contact solar cell modules.

[0018] 2. The pressing block assembly of the present invention can move linearly upward when subjected to the reaction force of the back-contact solar cell, thereby reducing the bending deformation that occurs during the welding process of the back-contact solar cell, reducing the occurrence of fragments and hidden cracks, and improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the back contact solar cell module ribbon interconnection;

[0020] Figure 2 It is a structural diagram of the utility model;

[0021] Figure 3 It is a schematic diagram of the use of the utility model;

[0022] Figure 4 It is a structural diagram of the briquetting assembly of the utility model;

[0023] Figure 5 This is an exploded schematic diagram of the briquetting assembly of the utility model;

[0024] Figure 6 It is a structural diagram of the briquetting of the utility model;

[0025] Figure 7 This is another structural schematic diagram of the briquetting assembly of the utility model;

[0026] Reference numerals in the figure: 1. frame structure, 2. pressing block assembly, 3. first back-contact solar cell, 4. second back-contact solar cell, 5. first welding ribbon, 6. second welding ribbon, 11. main beam, 12. placement space, 13. support rod, 14. connector, 21. pressing block, 22. elastic member, 23. stopper, 24. limiting member, 141. connecting portion, 142. mounting portion, 143. circular hole, 211. long axis, 212. pressing member, 213. annular notch, 2121. notch. DETAILED DESCRIPTION

[0027] The utility model is described in detail below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, it is a schematic diagram of the structure of the interconnected welding ribbons of the back-contact solar cell assembly, wherein the back-contact solar cell assembly includes a plurality of first back-contact solar cells 3 and second back-contact solar cells 4. The first back-contact solar cells 3 and the second back-contact solar cells 4 are connected into a cell string through the cross-arranged first welding ribbons 5 and second welding ribbons 6.

[0029] Among them, the first welding ribbon 5 connects the positive connecting electrode of the first back-contact solar cell 3 and the negative connecting electrode of the second back-contact solar cell 4, and the second welding ribbon 6 connects the negative connecting electrode of the first back-contact solar cell 3 and the positive connecting electrode of the second back-contact solar cell 4. The same can also be done vice versa, that is, the first welding ribbon 5 connects the negative connecting electrode of the first back-contact solar cell 3 and the positive connecting electrode of the second back-contact solar cell 4, and the second welding ribbon 6 connects the positive connecting electrode of the first back-contact solar cell 3 and the negative connecting electrode of the second back-contact solar cell 4.

[0030] based on Figure 1 In order to meet the need of interconnecting the welding strips, the welding tool in the present invention is provided.

[0031] like Figure 2-Figure 5As shown in the figure, the welding tooling for the back-contact solar cell module includes several frame structures 1. The frame structure 1 is in the shape of a rich character. The frame structure 1 includes a main beam 11. On both sides of the main beam 11, several support rods 13 are detachably connected. On the support rods 13, several connectors 14 are detachably connected. A pressing block assembly 2 is installed on the connectors 14. The connectors 14 and the main beam 11 are arranged in parallel.

[0032] Furthermore, the detachable connections between the main beam 11 and the support rods 13, and between the support rods 13 and the connectors 14 are not limited to bolt connections, plug connections and snap connections. The detachable connections facilitate adjusting the distances between adjacent support rods 13 and adjacent connectors 14 to adapt to the welding between different back-contact solar cells.

[0033] Specifically, in a single frame structure 1, the position of the support rod 13 corresponds to the position of the first solder tape 5 or the second solder tape 6 between the first back-contact solar cell 3 and the second back-contact solar cell 4. When the pressing block assembly 2 on the side of the frame structure 1 facing the solder tape presses down, it can press the solder tape tightly on the connecting electrode on the surface of the back-contact solar cell and achieve welding. Therefore, the downward pressure of a single frame structure 1 can achieve the welding of the first solder tape 5 or the second solder tape 6 between the first back-contact solar cell 3 and the second back-contact solar cell 4, and the cooperation of several frame structures 1 can achieve the welding of the first solder tape 5 and the second solder tape 6.

[0034] An installation space 12 is formed between adjacent support rods 13. At least one support rod 13 can be placed in the installation space 12. On the one hand, the existence of the installation space 12 provides a basis for the cross arrangement between the frame structures 1. On the other hand, the existence of the installation space 12 makes it so that when a single frame structure 1 presses down, it will only act on one type of solder tape, such as the first solder tape 5 or the second solder tape 6, without affecting the interconnection of other solder tapes between the solder tapes. The support rod 13 is arranged perpendicular to the main beam 11, determining the positional relationship between the support rod 13 and the main beam 11, which facilitates the assembly between the support rod 13 and the main beam 11.

[0035] As Figure 3 shown, adjacent frame structures 1 are arranged side by side or cross-arranged through the support rods 13.

[0036] Specifically, when several frame structures 1 are arranged side by side and pressed down, it can achieve the welding of one type of solder tape, such as the first solder tape 5 or the second solder tape 6, between the first back-contact solar cell 3 and the second back-contact solar cell 4. When several frame structures 1 are cross-arranged and pressed down in sequence, it can achieve the welding of the first solder tape 5 and the second solder tape 6 between the first back-contact solar cell 3 and the second back-contact solar cell 4.

[0037] In the present invention, several frame structures 1 are arranged in parallel and pressed down to achieve welding of a single type of welding ribbon on the surface of the back-contact solar cell assembly without affecting the welding of other types of welding ribbons. Several frame structures 1 are arranged crosswise and pressed down to achieve welding of all welding ribbons on the surface of the back-contact solar cell assembly, thereby improving the efficiency of interconnection of the back-contact solar cell assembly.

[0038] like Figure 4-Figure 6 As shown, the connector 14 includes a connecting portion 141 , one end of the connecting portion 141 is connected to the support rod 13 , and the other end of the connecting portion 141 is connected to the mounting portion 142 , and a circular hole 143 is formed in the middle of the mounting portion 142 .

[0039] The pressing block assembly 2 includes a pressing block 21 , an elastic member 22 and a limiting member 24 . The limiting member 24 is provided at the upper end of the pressing block 21 to limit the pressing block 21 downward.

[0040] The pressing block 21 includes a long axis 211 , which passes through the circular hole 143 , and a pressing piece 212 is formed at the bottom of the long axis 211 .

[0041] The elastic member 22 is located between the pressing member 212 and the mounting portion 142 . The elastic member 22 is preferably a spring, but may also be other elastic components.

[0042] For ease of understanding, in this embodiment, the limiting member 24 is configured as a retaining ring. The upper end of the long axis 211 forms an annular notch 213 that surrounds the long axis 211. The retaining ring is engaged with the annular notch 213 to limit the pressure block 21. Of course, the limiting member 24 can also be configured as a bolt that is screwed into the upper end of the long axis 211 to limit the pressure block 21.

[0043] Specifically, the stopper 24 engages the annular notch 213 to limit the downward movement of the pressure block 21 within the connector 14. The elastic member 22, located between the pressure member 212 and the mounting portion 142, controls the unlimited upward movement of the pressure member 212 within the connector 14. The elastic member 22 is compressed when subjected to the force of the pressure member 212. Simultaneously, the compressed elastic member 22 generates a reaction force acting on the pressure member 212, preventing the pressure member 212 from moving upward without restriction within the connector 14. The compression amount of the pressure block 21 is between 0 and 3 mm, and the preload of the elastic member 22 is set between 0.3 and 1 N.

[0044] Due to the presence of the elastic member 22, when the pressing member 212 presses the welding ribbon and is subjected to the reaction force of the back contact solar cell, the pressing member 212 can move upward in the connector 14, thereby preventing the back contact solar cell from bending and deforming during the welding process, reducing the occurrence of back contact solar cell fragments and hidden cracks, and improving the welding quality.

[0045] The bottom of the pressing piece 212 is generally flat, but in order to prevent the bottom of the pressing piece 212 from completely contacting the welding strip and reducing the processing accuracy of the pressing piece 212, a bowl-shaped notch 2121 can also be processed in the middle of the bottom of the pressing piece 212.

[0046] The pressing block assembly of the utility model can move linearly upward when subjected to the reaction force of the back contact solar cell, thereby reducing the bending deformation occurring during the welding process of the back contact solar cell, reducing the occurrence of fragments and hidden cracks, and improving the welding quality.

[0047] like Figure 7 As shown, a stopper 23 can be further provided between the elastic member 22 and the mounting portion 142 , and the stopper 23 further limits the upward movement distance of the pressing member 212 , while reducing the height of the elastic member 22 , thereby preventing the elastic member 22 from becoming unstable due to excessive force.

[0048] Specific implementation of welding tooling for back contact solar cell modules:

[0049] Before the welding ribbon and the back-contact solar cell are welded, the pressing block structure 2 maintains a certain distance from the surface of the back-contact solar cell. When the welding ribbon is pulled and placed on the back-contact solar cell, the frame structure 1 moves downward, and the pressing block structure 2 presses the welding ribbon against the connecting electrode of the back-contact solar cell to achieve welding. After welding is completed, the frame structure 1 rises away from the surface of the back-contact solar cell, and then returns to the loading station to repeat the action.

[0050] The above description of the disclosed embodiments will enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

[0051] Although this article uses the following figures more frequently: 1, frame structure, 2, pressing block assembly, 3, first back-contact solar cell, 4, second back-contact solar cell, 5, first welding ribbon, 6, second welding ribbon, 11, main beam, 12, placement space, 13, support rod, 14, connector, 21, pressing block, 22, elastic member, 23, stopper, 24, limiting member, 141, connecting portion, 142, mounting portion, 143, circular hole, 211, long axis, 212, pressing member, 213, annular notch, 2121, notch and other terms, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A welding tool for back contact solar cell modules, characterized by: The invention comprises a plurality of frame structures (1), wherein the frame structures (1) comprise a main beam (11), wherein both sides of the main beam (11) are detachably connected to a plurality of support rods (13), wherein the support rods (13) are detachably connected to a plurality of connectors (14), wherein the connectors (14) are mounted with a pressure block assembly (2), and wherein the connectors (14) and the main beam (11) are arranged in parallel.

2. The welding tool for back contact solar cell modules according to claim 1, characterized in that: An accommodating space (12) is formed between adjacent support rods (13), and at least one support rod (13) can be placed in the accommodating space (12).

3. The welding tool for back contact solar cell module according to claim 2, characterized in that: Adjacent frame structures (1) are arranged in parallel or cross-arranged via support rods (13).

4. The welding tool for back contact solar cell module according to claim 3, characterized in that: The support rod (13) is arranged perpendicular to the main beam (11).

5. The welding tool for back-contact solar cell modules according to claim 1, characterized in that: The connector (14) comprises a connecting portion (141), one end of the connecting portion (141) is connected to the support rod (13), the other end of the connecting portion (141) is connected to the mounting portion (142), and a circular hole (143) is formed in the middle of the mounting portion (142).

6. The welding tool for back contact solar cell module according to claim 5, characterized in that: The pressing block assembly (2) comprises a pressing block (21), an elastic member (22) and a limiting member (24); the limiting member (24) is arranged at the upper end of the pressing block (21) to limit the pressing block (21) downward.

7. The welding tool for back contact solar cell module according to claim 6, characterized in that: The pressing block (21) comprises a long axis (211), the long axis (211) passes through the circular hole (143), and a pressing piece (212) is formed at the bottom of the long axis (211).

8. The welding tool for back contact solar cell module according to claim 7, characterized in that: The elastic member (22) is located between the pressing member (212) and the mounting portion (142).

9. The welding tool for back-contact solar cell modules according to claim 8, characterized in that: A notch (2121) is formed in the middle of the bottom of the pressing piece (212).

10. The welding tool for back contact solar cell module according to claim 6, characterized in that: It comprises a stopper (23), wherein the stopper (23) is located between the elastic member (22) and the mounting portion (142).

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