Battery piece welding device

Abstract

The utility model provides a battery piece welding device which comprises a conveying mechanism, a welding mechanism and an air cooling mechanism, a laying station, a welding station and a cooling station are sequentially arranged on a conveying path of the conveying mechanism, and battery pieces, welding strips and pressing tools are laid on the laying station according to a preset string forming rule; the welding mechanism is arranged at the welding station, and the welding mechanism is configured to heat the battery piece and the welding strip located at the welding station, so that the welding strip is welded to the battery piece after welding flux on the surface of the welding strip is heated and melted; and the air cooling mechanism is arranged at the cooling station and is configured to carry out air cooling on the battery pieces located at the cooling station. According to the battery piece welding device, the air cooling mechanism is arranged on the rear channel of the welding station, the air cooling mechanism can conduct air cooling on the welded battery piece and the welding strip, and therefore solidification of welding flux on the surface of the welding strip is accelerated, and the battery piece is prevented from being taken up when the pressing tool is taken away.

Description

Technical Field

[0001] This application relates to the field of photovoltaic cell module production equipment, and more particularly to a cell welding device. Background Art

[0002] When making a battery string, it is necessary to lay cells and solder tapes on a conveying mechanism. The conveying mechanism transports the laid cells and solder tapes to the lower part of a welding mechanism for stringing. After the solder on the solder tape melts, the solder tape is connected to the cells to obtain a battery string. To ensure the quality of the string, after laying the solder tape on the cells, it is also necessary to lay a pressing tool on the cells. The solder tape pressing tool presses the solder tape against the corresponding cells.

[0003] After completing the welding of the solder tape, it is necessary to remove the pressing tool from the battery string for recycling. However, since the solidification time of the solder on the surface of the solder tape is relatively long in the natural environment, when removing the pressing tool from the battery string, not all of the solder on the solder tape has cooled and solidified. The solder may adhere to the pressing tool when removing the pressing tool, causing the cells to be lifted when the pressing tool is removed, ultimately affecting the welding quality. Summary of the Utility Model

[0004] To solve the above technical problems, this application provides a cell welding device, which adopts the following technical solutions:

[0005] A cell welding device includes a conveying mechanism, a welding mechanism, and an air-cooling mechanism, where:

[0006] A laying station, a welding station, and a cooling station are sequentially arranged on the conveying path of the conveying mechanism. Cells, solder tapes, and pressing tools are laid on the laying station according to a predetermined stringing rule;

[0007] The welding mechanism is arranged at the welding station. The welding mechanism is configured to heat the cells and solder tapes at the welding station, so that the solder on the surface of the solder tape melts and the solder tape is welded to the cells;

[0008] The air-cooling mechanism is arranged at the cooling station. The air-cooling mechanism is configured to perform air cooling on the cells at the cooling station.

[0009] In the cell welding device provided by this application, an air-cooling mechanism is arranged after the welding station. The air-cooling mechanism can perform air cooling on the welded cells and solder tapes, accelerating the solidification of the solder on the surface of the solder tape, preventing the cells from being lifted when the pressing tool is removed. In addition, the air-cooling mechanism can also prevent the solder on the edge of the cells leaving the light box from being re-tinned due to the heat at the outlet of the light box.

[0010] In some embodiments, the air-cooling mechanism is installed on the conveying mechanism, or the air-cooling mechanism has an independent mounting bracket and is installed on the mounting bracket.

[0011] Installing the air cooling mechanism on the conveying mechanism can reduce the equipment cost. Setting the air cooling mechanism on the side of the conveying mechanism through an independent mounting bracket facilitates the installation and maintenance of the air cooling mechanism.

[0012] In some embodiments, the air cooling mechanism includes a gas collecting block and a blowing block, wherein: a gas collecting cavity is provided in the gas collecting block, and the gas collecting cavity is communicated with an external compressed air source; the blowing block is connected to the gas collecting block, a blowing cavity communicated with the gas collecting cavity is provided in the blowing block, a blowing surface facing the cooling station is provided on the blowing block, and a plurality of blowing holes communicated with the blowing cavity are provided on the blowing surface, and the blowing holes are used for blowing air towards the cooling station.

[0013] By setting the air cooling mechanism into a split structure composed of a gas collecting block and a blowing block, it facilitates the processing and forming of gas path structures such as the gas collecting cavity, the blowing cavity, and the blowing holes.

[0014] In some embodiments, the blowing surface is inclined, and an angle of 50° - 70° is formed between the blowing surface and the horizontal plane.

[0015] Setting the angle between the blowing surface and the horizontal plane to 50° - 70° can, on the one hand, ensure that the air flow blown out from the blowing holes reaches the battery sheet, and on the other hand, enable the air flow blown out from the blowing holes to cover the entire surface of the battery sheet, thereby ensuring the air cooling effect on the battery sheet.

[0016] In some embodiments, the air cooling mechanism further includes an air amplifier; the air inlet of the air amplifier is communicated with the compressed air source, and the air outlet of the air amplifier is communicated with the gas collecting cavity.

[0017] By setting an air amplifier communicated with the compressed air source, the compressed air source only needs to introduce a small amount of compressed air as a power source into the air amplifier, and the air amplifier can drive the surrounding air to flow into the gas collecting cavity, forming a high-pressure air flow, which is finally blown out through the blowing holes. In this way, the air circulation can be accelerated and the air consumption of the compressed air source can be reduced.

[0018] In some embodiments, two air amplifiers are provided, and two independent gas collecting cavities are arranged at intervals in the gas collecting block, and the air amplifiers are arranged in one-to-one correspondence with the two gas collecting cavities in the gas collecting block.

[0019] By synchronously introducing high-pressure air flows into the two gas collecting cavities in the gas collecting block through two air amplifiers, the air cooling effect and the air cooling uniformity of the air cooling mechanism can be enhanced.

[0020] In some embodiments, the length direction of the blowing block is parallel to the conveying direction of the conveying mechanism, and a plurality of blowing holes are arranged on the blowing surface along the length direction of the blowing block.

[0021] Further ensure that the air flow blown out from the blowing surface can cover the battery cells, improving the air cooling effect.

[0022] In some embodiments, the height of the lower edge of the blowing block is higher than the height of the upper surface of the pressing tooling located at the cooling station; and the blowing block is located in the edge area of the cooling station.

[0023] The blowing block blows air downward from above the pressing tooling, so that the air flow can pass through the hollow area on the pressing tooling and reach the battery cells, preventing the tooling from blocking the air flow.

[0024] In some embodiments, the battery cell welding device further includes a tooling blanking mechanism, which is arranged at the cooling station or at the subsequent process of the cooling station. The tooling blanking mechanism is used to remove the pressing tooling from the conveying mechanism.

[0025] By setting the tooling blanking mechanism, automatic blanking of the pressing tooling is realized.

[0026] In some embodiments, the conveying mechanism includes a conveyor belt and a support plate arranged below the conveyor belt and used to support the conveying surface of the conveyor belt; through holes are arranged on the conveyor belt, negative pressure adsorption holes are arranged on the support plate, and the negative pressure adsorption holes are connected to an air extraction device; heating elements are arranged on the support plates at the welding station and the cooling station.

[0027] By arranging through holes on the conveyor belt and negative pressure adsorption holes on the support plate, adsorption and positioning of the battery cells are realized, preventing the battery cells from sliding during conveying and welding, thereby improving the welding-in-series effect. The heating element on the support plate at the welding station can cooperate with the welding mechanism to heat the battery cells and the welding tape, thereby improving the welding efficiency. The heating element on the support plate at the cooling station can continuously heat the battery cells, so that the thermosetting glue on the surface of the battery cells can continue to cure, thereby accelerating the formation of the battery cell series. Of course, the heating temperature of the heating element on the support plate at the cooling station is lower than the melting point of the solder. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of a battery cell welding device in an embodiment of the present application;

[0029] Figure 2 It is a partial structural schematic diagram of a battery cell welding device in an embodiment of the present application;

[0030] Figure 3 It is a schematic structural diagram of the air cooling mechanism in the first perspective in an embodiment of the present application;

[0031] Figure 4 It is a schematic structural diagram of the air cooling mechanism in the second perspective in an embodiment of the present application;

[0032] Figure 5 Schematic diagram of the air-cooling mechanism in a third perspective in an embodiment of the present application;

[0033] Figure 6 is Figure 5 A-A sectional view of;

[0034] Figure 7 Schematic diagram of the structure of the battery cell welding device in another embodiment of the present application.

[0035] Figures 1 to 7 includes:

[0036] Conveyor mechanism 1;

[0037] Welding mechanism 2;

[0038] Air-cooling mechanism 3: air collecting block 31, air blowing block 32, air collecting cavity 33, air blowing cavity 34, air blowing surface 35, air blowing holes 36, air amplifier 37, connector 38;

[0039] Tooling blanking mechanism 4;

[0040] Laying station A, welding station B, cooling station C. Detailed implementation manners

[0041] To make the above objects, features and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0042] As Figures 1 to 2 shown, the battery cell welding device in the embodiment of the present application includes a conveyor mechanism 1, a welding mechanism 2 and an air-cooling mechanism 3, wherein:

[0043] On the conveying path of the conveyor mechanism 1, a laying station A, a welding station B and a cooling station C are sequentially arranged, and battery cells, welding tapes and pressing toolings are laid on the laying station A according to a predetermined stringing rule.

[0044] The welding mechanism 2 is arranged at the welding station B, and the welding mechanism 2 is configured to heat the battery cells and welding tapes at the welding station, so that the solder on the surface of the welding tape is heated and melted to weld the welding tape to the battery cells. The welding mechanism 2 can adopt existing heating devices such as a heating lamp box, for example, it can be a lamp box composed of infrared heating tubes and a frame, or a heating device formed by arranging an array of electric heating wires, or a hot air heating device composed of a hot air blowing pipeline.

[0045] The air-cooling mechanism 3 is arranged at the cooling station C, and the air-cooling mechanism 3 is configured to perform air cooling on the battery cells at the cooling station C.

[0046] The pressing tooling is a modular and reusable pressing component. In some implementation manners, the tooling includes a frame, on which multiple rows of mounting holes are provided, and elastic pressing heads are mounted in the mounting holes. The lower ends of the elastic pressing heads extend out of the tooling to elastically press the welding tape and the battery cell together, and each row of elastic pressing heads is used to press the welding tape and the battery cell together in the length direction of the welding tape. Or the tooling includes a pressing block, and the pressing block presses the welding tape and the battery cell together.

[0047] Since an air cooling mechanism is arranged at the subsequent stage of the welding station, the air cooling mechanism can implement air cooling on the welded battery cell and the welding tape, thereby accelerating the solidification of the solder on the surface of the welding tape, preventing the solder from adhering to the pressing tooling, causing the battery cell to be lifted when the pressing tooling is taken away, and preventing the edge welding tape of the battery cell leaving the light box from being re-tinned due to the heat at the outlet of the light box.

[0048] To reduce the equipment cost and the structural complexity of the equipment, optionally, the air cooling mechanism 3 is mounted on the conveying mechanism 2. Of course, to improve the independence of the air cooling mechanism 3 and facilitate the installation and maintenance of the air cooling mechanism 3, the air cooling mechanism 3 can also be arranged on the side of the conveying mechanism 2 through an independent mounting bracket.

[0049] As Figures 2 to 5 shown, optionally, the air cooling mechanism 3 includes an air collecting block 31 and a blowing block 32, wherein: an air collecting cavity 33 is arranged in the air collecting block 31, and the air collecting cavity 33 is communicated with an external compressed air source. The blowing block 32 is connected to the air collecting block 31, and a blowing cavity 34 communicated with the air collecting cavity 33 is arranged in the blowing block 32. The blowing block 32 has a blowing surface 35 facing the cooling station C, and a plurality of blowing holes 36 communicated with the blowing cavity 34 are arranged on the blowing surface 35, and the blowing holes 36 are used for blowing air towards the cooling station C.

[0050] By setting the air cooling mechanism 3 into a split structure composed of the air collecting block 31 and the blowing block 32, it is convenient to process and form the air path structures such as the air collecting cavity 33, the blowing cavity 34 and the blowing holes 36 therein.

[0051] As Figure 5 shown, optionally, the blowing surface 35 is inclined, and an included angle a of 50° to 70° is formed between the blowing surface 35 and the horizontal plane. The included angle a can be set to, for example, 50°, 55°, 58°, 59°, 60°, 61°, 65°, 68° and 70°, etc.

[0052] When the angle α between the air blowing surface 35 and the horizontal plane exceeds 70°, since the inclination angle of the air blowing surface 35 is too large, most of the air flow blown out from the air blowing holes 36 passes over the battery cell in a horizontal state or close to the horizontal state, and effective cooling of the battery cell cannot be implemented. When the angle α between the air blowing surface 35 and the horizontal plane is lower than 50°, since the inclination angle of the air blowing surface 35 is too small, the air flow blown out from the air blowing holes 36 can only cover a partial area of the battery cell, and full cooling of the battery cell cannot be implemented, resulting in the solder on some of the solder joints on the battery cell not being able to solidify quickly.

[0053] The angle between the air blowing surface 35 and the horizontal plane is set to 50° - 70°. On the one hand, it can ensure that the air flow blown out from the air blowing holes 36 can smoothly reach the battery cell. On the other hand, it enables the air flow blown out from the air blowing holes 36 to cover the entire surface of the battery cell, thereby ensuring the air cooling effect on the battery cell.

[0054] Continue to refer to Figures 2 to 5 As shown, optionally, the air cooling mechanism 3 further includes an air amplifier 37. The air inlet of the air amplifier 37 is connected to the compressed air source through a connector 38, and the air outlet of the air amplifier 37 is connected to the air collecting cavity 33. By providing the air amplifier 37 connected to the compressed air source, the compressed air source only needs to introduce a small amount of compressed air as the power source into the air amplifier 37, and the air amplifier 37 can drive the surrounding air to flow into the air collecting cavity 33, thereby forming a high-pressure and high-speed air flow, which is finally blown out through the air blowing holes 36. In this way, the air consumption of the compressed air source can be reduced, the cost can be lowered, and the air flow can be effectively accelerated to improve the cooling effect. The air amplifier can adopt a linear air amplifier. The structure and working principle of the air amplifier 37 are well-known to those skilled in the art and will not be elaborated here for the sake of brevity.

[0055] Optionally, there are two air amplifiers 37. For example, the two air amplifiers 37 are arranged at both ends of the air collecting block 31. Correspondingly, two independent air collecting cavities 33 are arranged at intervals in the air collecting block 31, and the two air amplifiers 37 are arranged in one-to-one correspondence with the two air collecting cavities 33 in the air collecting block 31.

[0056] By synchronously introducing high-pressure air flows into the two air collecting cavities 33 in the air collecting block 31 through the two air amplifiers 37, the air cooling effect and the air cooling uniformity of the air cooling mechanism 3 can be further enhanced.

[0057] Optionally, the length direction of the air blowing block 32 is parallel to the conveying direction of the conveying mechanism 1, and a plurality of air blowing holes 36 are arranged on the air blowing surface along the length direction of the air blowing block 32. With such a setting, it can be further ensured that the air flow blown out from the air blowing surface 35 can cover the battery cell and improve the air cooling effect.

[0058] In addition, by setting the length of the air blowing block 32, the air flow blown out from the air blowing surface 35 can cover one solar cell or cover two, three or more solar cells simultaneously.

[0059] Optionally, the height of the lower edge of the air blowing block 32 is higher than the height of the upper surface of the pressing fixture located at the cooling station C, and the air blowing block 32 is located in the edge area of the cooling station C. With such a setting, the air blowing block 32 can blow air downward from above the pressing fixture, so that the air flow blown out by the air blowing block 32 passes through the hollow area on the pressing fixture and reaches the solar cell, preventing the side wall of the fixture from blocking the air flow.

[0060] As Figure 7 shown, optionally, the solar cell welding device in the embodiment of the present application further includes a fixture blanking mechanism 4. The fixture blanking mechanism 4 is arranged at the cooling station C or at the subsequent process of the cooling station C. The fixture blanking mechanism 4 is used to remove the pressing fixture from the conveying mechanism, thereby realizing the automatic blanking and recycling of the pressing fixture.

[0061] The fixture blanking mechanism 4 can adopt various existing handling devices capable of handling the pressing fixture. For example, it can include a drive composed of a lifting and traversing servo module, and an electromagnet installed on the drive. The electromagnet is used to adsorb the fixture; or a magnetic adsorption component driven by a robotic arm.

[0062] Optionally, the conveying mechanism 1 includes a conveyor belt and a support plate arranged below the conveyor belt and used to support the conveying surface of the conveyor belt. Through holes are arranged on the conveyor belt, and negative pressure adsorption holes are arranged on the support plate. The negative pressure adsorption holes are connected to an air extraction device. The air extraction device extracts air from the through holes on the conveyor belt through the negative pressure adsorption holes, so that the conveyor belt generates an adsorption force, finally realizing the adsorption and positioning of the solar cell, preventing the solar cell from sliding during the conveying and welding processes, and thus improving the welding-in-series effect.

[0063] Optionally, heating elements are arranged on the support plates at the welding station B and the cooling station C. The heating element on the support plate at the welding station can cooperate with the welding mechanism 2 to heat the solar cell and the welding tape, thereby improving the welding efficiency. The heating element on the support plate at the cooling station C can continuously heat the solar cell, so that while the welding tape on the solar cell is cooled and temperature-reduced, through the heat conduction effect of the solar cell, the thermosetting glue on the surface of the solar cell continues to cure, thus accelerating the formation of the solar cell series. Of course, the heating temperature of the heating element on the support plate at the cooling station C is set to be lower than the melting point of the solder.

[0064] The above description of the present application is detailed enough and has a certain particularity. Those of ordinary skill in the art should understand that the description in the embodiments is only exemplary, and all changes made without departing from the true spirit and scope of the present application should fall within the protection scope of the present application. The scope of protection required by the present application is defined by the claims described, rather than by the above description in the embodiments.

Claims

1. A solar cell welding device, characterized in that, The battery cell welding device includes a conveying mechanism, a welding mechanism and an air cooling mechanism, where: On the conveying path of the conveying mechanism, a laying station, a welding station and a cooling station are sequentially arranged, and the battery cells, welding tapes and pressing toolings are laid on the laying station according to a predetermined stringing rule; The welding mechanism is arranged at the welding station, and the welding mechanism is configured to heat the battery cells and welding tapes located at the welding station, so that the solder on the surface of the welding tape is melted by heat and the welding tape is welded to the battery cells; The air cooling mechanism is arranged at the cooling station, and the air cooling mechanism is configured to perform air cooling on the battery cells located at the cooling station.

2. The solar cell welding device according to claim 1, wherein, The air cooling mechanism is installed on the conveying mechanism, or the air cooling mechanism has an independent mounting bracket, and the air cooling mechanism is installed on the mounting bracket.

3. The solar cell welding device according to claim 1, characterized in that, The air cooling mechanism includes an air collecting block and a blowing block, where: An air collecting cavity is arranged in the air collecting block, and the air collecting cavity is communicated with an external compressed air source; The blowing block is connected to the air collecting block, a blowing cavity communicated with the air collecting cavity is arranged in the blowing block, a blowing surface facing the cooling station is arranged on the blowing block, and a plurality of blowing holes communicated with the blowing cavity are arranged on the blowing surface, and the blowing holes are used for blowing air towards the cooling station.

4. The solar cell welding device according to claim 3, wherein The blowing surface is inclined, and an included angle of 50° to 70° is formed between the blowing surface and the horizontal plane.

5. The solar cell welding device according to claim 3, wherein The air cooling mechanism further includes an air amplifier; The air inlet of the air amplifier is communicated with the compressed air source, and the air outlet of the air amplifier is communicated with the air collecting cavity.

6. The solar cell welding device according to claim 5, wherein, There are two air amplifiers, and two independent air collecting cavities are arranged in the air collecting block at intervals, The air amplifiers are arranged in one-to-one correspondence with the two air collecting cavities in the air collecting block.

7. The solar cell welding device according to claim 5, characterized in that, The length direction of the blowing block is parallel to the conveying direction of the conveying mechanism, and a plurality of the blowing holes are arranged on the blowing surface along the length direction of the blowing block.

8. The solar cell welding device according to claim 3, wherein The height of the lower edge of the blowing block is higher than the height of the upper surface of the pressing tooling located at the cooling station; And the blowing block is located in the edge area of the cooling station.

9. The solar cell welding device according to claim 1, characterized in that, The battery cell welding device further includes a tooling blanking mechanism, and the tooling blanking mechanism is arranged at the cooling station or at the subsequent process of the cooling station, and the tooling blanking mechanism is used to remove the pressing tooling from the conveying mechanism.

10. The solar cell welding device according to claim 1, wherein The conveying mechanism includes a conveyor belt and a support plate arranged below the conveyor belt and used for supporting the conveying surface of the conveyor belt; Through holes are arranged on the conveyor belt, negative pressure adsorption holes are arranged on the support plate, and the negative pressure adsorption holes are connected with an air extraction device; Heating elements are arranged on the support plates located at the welding station and the cooling station.

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