Welding device

Abstract

The utility model provides a kind of welding device, and welding device includes workbench and laser welding machine, workbench includes rotary table and base, rotary table is set on base, and laser welding machine is fixed on base;Rotary table is placed with foamed nickel and bipolar plate, bipolar plate is stacked above foamed nickel, and laser welding machine welds foamed nickel and bipolar plate, and rotary table can rotate on base to change the welding position of foamed nickel and bipolar plate;Laser welding machine has high welding precision and high efficiency, and foamed nickel and bipolar plate can be welded by using laser welding machine, and the welding line is as small as possible, to prevent its protrusion, to affect the overall surface, finally affect the output performance of battery;In addition, rotary table can rotate on base to change the welding position of foamed nickel and bipolar plate, which greatly reduces the labor intensity of operator, because operator only needs to rotate rotary table to realize the welding of foamed nickel and bipolar plate by laser welding machine.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a welding device. Background Technology

[0002] An electrolytic cell stack is a device composed of multiple individual cells stacked in series, primarily used for electrolyzing water to produce hydrogen or oxygen. The bipolar plates and nickel foam of each individual cell need to be welded. If resistance welding is used, the high temperature and long operation time result in low efficiency, and the protruding weld lines affect the overall surface finish, ultimately impacting the cell's output performance.

[0003] Due to the large size of the bipolar plate (approximately 600 mm), the operator's range of motion is large, increasing labor intensity; the welding temperature is high, making operation unsafe. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art, such as the protruding welding line affecting the output performance of the battery and increasing the labor intensity of the operator, and to provide a welding device.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A welding apparatus for welding nickel foam and bipolar plates, the welding apparatus including a worktable and a laser welding machine, the worktable including a rotary table and a base, the rotary table being disposed on the base, and the laser welding machine being fixed on the base;

[0007] The rotary table is used to place nickel foam and bipolar plates, with the bipolar plates stacked on top of the nickel foam. The laser welding machine is used to weld the nickel foam and bipolar plates. The rotary table can rotate relative to the base to provide multiple welding zones.

[0008] In this solution, the laser welding machine offers high welding precision and efficiency. Using a laser welding machine to weld nickel foam and bipolar plates allows for the finest possible weld lines, preventing them from protruding and affecting the overall weld surface, ultimately impacting the battery's output performance. Consequently, this application optimizes the overall weld surface quality, thereby improving the battery's output performance. Furthermore, the rotary table can rotate on the base to change the welding position of the nickel foam and bipolar plates. This design significantly reduces the operator's workload, as the operator only needs to rotate the rotary table to easily weld the nickel foam and bipolar plates in multiple welding areas using the laser welding machine.

[0009] Preferably, the welding device includes a rotating mechanism, one end of which is connected to a rotary table and the other end is connected to a base, and is located between the rotary table and the base.

[0010] In this design, the rotating mechanism facilitates the rotation of the rotary table. Furthermore, by operating the rotating mechanism, it is possible to reliably fix the rotating mechanism to the corresponding welding area or welding device when the rotary table needs to be stopped, and it also helps to reduce the space occupied by the welding device.

[0011] Preferably, the welding apparatus further includes a pressure plate that covers the bipolar plate and applies pressure to the nickel foam and the bipolar plate.

[0012] In this design, the pressure plate helps prevent the nickel foam and bipolar plate from shaking freely, thereby improving the welding effect of the nickel foam and bipolar plate. It also helps to prevent the weld lines from protruding and becoming unsightly.

[0013] Preferably, the welding apparatus further includes a clamping device, which is mounted on a rotary table and acts on a pressure plate.

[0014] In this design, the clamping device further prevents the nickel foam and bipolar plate from swaying freely, thereby improving the welding effect of the nickel foam and bipolar plate. Furthermore, the clamping device acts on the pressure plate rather than directly on the bipolar plate, which helps protect the bipolar plate from damage. Preferably, multiple clamping devices are evenly spaced along the circumferential direction of the rotary table at its edge.

[0015] In this scheme, the above-mentioned arrangement can make the pressure plate, nickel foam, bipolar plate and rotary table uniform and balanced, preventing them from tilting to one side, thereby further improving the welding effect; in addition, the arrangement of multiple clamping devices can make the nickel foam and bipolar plate firmly placed on the rotary table; the clamping devices are located at the edge of the rotary table to prevent the clamping devices from affecting the welding work.

[0016] Preferably, the pressure plate is provided with multiple air inlet pipes that pass through the pressure plate to deliver argon or nitrogen to the welding area.

[0017] In this solution, the argon or nitrogen gas introduced into the welding environment can isolate the air and prevent oxidation. Oxidizing compounds will reduce the strength, toughness and corrosion resistance of the weld line.

[0018] Preferably, the welding apparatus further includes a positioning mechanism fixed on the rotary table and used to position the nickel foam and the bipolar plate.

[0019] In this solution, the positioning mechanism facilitates the positioning of the nickel foam and the bipolar plate, making it easier to position the nickel foam and the bipolar plate on the rotary table. This not only improves welding efficiency but also ensures the accuracy of the welding position of the laser welding machine.

[0020] Preferably, multiple positioning mechanisms are provided, and the multiple positioning mechanisms are evenly spaced along the circumferential direction of the rotary table at the edge of the rotary table;

[0021] When the rotary table rotates to the point where any positioning mechanism is on the same radial line as the laser welding machine, the rotary table is configured to stop rotating, and the laser welding machine corresponds to the welding area of ​​the nickel foam and the bipolar plate and performs welding on the current welding area.

[0022] The rotary table is configured to resume rotation after the laser welding machine completes welding of the current welding area, until the next positioning mechanism is on the same radial line as the laser welding machine on the rotary table.

[0023] In this design, multiple positioning mechanisms indicate multiple welding areas. This arrangement allows the nickel foam and bipolar plates to be firmly welded together. Furthermore, when the positioning mechanisms are aligned with the laser welding machine on the same radial line as the rotary table, they can identify the location of the welding areas for welding purposes. In addition, the positioning mechanisms are evenly distributed along the edge of the rotary table to prevent them from interfering with the welding process and to ensure the balance of the worktable.

[0024] Preferably, along the circumferential direction of the rotary table, the width of the welding area is less than the width between two adjacent clamping devices.

[0025] In this design, the above arrangement ensures that the welding area is completely covered by the area between two adjacent clamping devices. In other words, the welding work is carried out in an area where the nickel foam and the bipolar plate are pressed very stably, resulting in a better welding effect. In addition, this arrangement allows the laser welding machine to be made smaller, thus occupying less space.

[0026] Preferably, the pressure plate is provided with a handle, which can be operated to drive the rotary table to rotate.

[0027] In this design, the handle makes it easier for operators to apply force to the pressure plate, reducing the labor intensity of operators and facilitating the rotation of the rotary table.

[0028] The positive and progressive effects of this utility model are as follows: The laser welding machine has high welding precision and high efficiency. Using a laser welding machine to weld nickel foam and bipolar plates can make the welding line as thin as possible, preventing it from protruding and affecting the overall surface, and ultimately affecting the output performance of the battery. Accordingly, this application can optimize the quality of the overall weld surface, thereby optimizing the output performance of the battery. In addition, the rotary table can rotate on the base to change the welding position of nickel foam and bipolar plates. This setting greatly reduces the labor intensity of the operator, because the operator only needs to rotate the rotary table to realize the welding of nickel foam and bipolar plates in multiple welding areas by the laser welding machine. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the welding device according to an embodiment of the present invention.

[0030] Figure 2 This is a perspective view of a welding apparatus according to an embodiment of the present invention. Figure 3 This is a top view of a welding apparatus according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the structure of a laser welding machine according to an embodiment of the present invention.

[0032] Figure 5 This is another structural schematic diagram of a laser welding machine according to an embodiment of the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] Welding equipment 100

[0035] Workbench 1

[0036] Rotary table 11

[0037] Base 12

[0038] Laser welding machine 2

[0039] Rotating mechanism 3

[0040] Pressure plate 4

[0041] Intake pipe 41

[0042] Handle 42

[0043] Welding area 43

[0044] Clamping device 5

[0045] Positioning mechanism 6

[0046] Nickel Foam 200

[0047] Bipolar plate 300 Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings and by way of embodiments, but the present invention is not limited to the scope of the embodiments thereon.

[0049] like Figure 1-5As shown, this embodiment provides a welding apparatus 100 for welding nickel foam 200 and bipolar plate 300. The welding apparatus 100 includes a worktable 1 and a laser welding machine 2. The worktable 1 includes a rotary table 11 and a base 12. The rotary table 11 is disposed on the base 12, and the laser welding machine 2 is fixed on the base 12. The rotary table 11 is used to place nickel foam 200 and bipolar plate 300, with the bipolar plate 300 stacked on top of the nickel foam 200. The laser welding machine 2 is used to weld nickel foam 200 and bipolar plate 300. The rotary table 11 can rotate relative to the base 12 to provide multiple welding areas 43.

[0050] In this embodiment, the laser welding machine 2 has high welding precision and efficiency. Using the laser welding machine 2 to weld the nickel foam 200 and the bipolar plate 300 can make the welding line as thin as possible, preventing it from protruding and affecting the overall weld surface, which in turn affects the output performance of the battery. Accordingly, this application can optimize the quality of the overall weld surface, thereby optimizing the output performance of the battery. In addition, the rotary table 11 can rotate on the base 12 to change the welding position of the nickel foam 200 and the bipolar plate 300. This setting greatly reduces the labor intensity of the operator, because the operator only needs to rotate the rotary table 11 to easily realize the welding of the nickel foam 200 and the bipolar plate 300 in multiple welding areas 43 by the laser welding machine 2.

[0051] It should be noted that the order of the bipolar plate 300 stack and the nickel foam 200 cannot be changed; the laser welding machine 2 remains stationary, while the rotary table 11 rotates to different positions to perform welding work; such as Figure 3 As shown, the rotating platform 11 has a circular surface and the base 12 has a square surface, with the circular surface inscribed within the square area of ​​the base 12.

[0052] Furthermore, it should be noted that the two sides of the bipolar plate 300 have staggered grooves; the groove area is smaller than that of the nickel foam 200; the nickel foam 200 is a gas diffusion layer, ensuring the transmission of gas and liquid between the bipolar plate 300 and the catalyst layer, and providing effective electron conduction; at the same time, it has high conductivity, so that current can be transmitted quickly and efficiently, reducing energy loss.

[0053] like Figure 1-3 As shown, the welding device 100 includes a rotating mechanism 3, one end of which is connected to the rotating table 11 and the other end is connected to the base 12, and is located between the rotating table 11 and the base 12.

[0054] In this embodiment, the rotation mechanism 3 is provided to facilitate the rotation of the rotary table 11; in addition, by operating the rotation mechanism 3, the rotation mechanism 3 can be reliably fixed on the welding device 100 when the rotary table 11 needs to stop rotating, and the space occupied by the welding device 100 is reduced.

[0055] It should be noted that the rotating mechanism 3 can also be located in other positions, as long as it can enable the rotating platform 11 to rotate relative to the base 12; in addition, the rotating mechanism 3 can enable the rotating platform 11 to rotate, and can be an intelligent rotating mechanism or a rotating shaft.

[0056] like Figure 1-3 As shown, the welding apparatus 100 also includes a pressure plate 4, which covers the bipolar plate 300 and provides pressure to press down the nickel foam 200 and the bipolar plate 300.

[0057] In this embodiment, the pressure plate 4 helps to prevent the nickel foam 200 and the bipolar plate 300 from shaking randomly, thereby improving the welding effect of the nickel foam 200 and the bipolar plate 300 and preventing the weld line from protruding and unsightly to a certain extent.

[0058] It should be noted that the pressure plate 4 is heavy to increase the pressure of the pressure plate 4 on the bipolar plate 300 and the nickel foam 200, thereby improving the stability of the nickel foam 200 and the bipolar plate 300 during the welding process; in addition, the size of the pressure plate 4 is larger than the size of the bipolar plate 300, that is, the pressure plate 4 can cover the entire bipolar plate 300.

[0059] like Figure 1-5 As shown, the welding device 100 also includes a clamping device 5, which is mounted on the rotary table 11 and acts on the pressure plate 4.

[0060] In this embodiment, the clamping device 5 further prevents the nickel foam 200 and the bipolar plate 300 from shaking randomly, thereby further improving the welding effect of the nickel foam 200 and the bipolar plate 300. In addition, the clamping device 5 acts on the pressure plate 4 instead of directly on the bipolar plate 300, which helps to protect the bipolar plate 300 from damage.

[0061] It should be noted that the clamping device 5 can rotate together with the rotary table 11; in addition, the clamping device only needs to be able to perform the clamping function.

[0062] like Figure 1-3 As shown, multiple clamping devices 5 are evenly spaced along the circumferential direction of the rotary table 11 at the edge of the rotary table 11.

[0063] In this embodiment, the above-mentioned arrangement can make the pressure plate 4, nickel foam 200, bipolar plate 300 and rotary table 11 uniform and balanced under force, preventing them from tilting to one side, thereby further improving the welding effect; in addition, the arrangement of multiple clamping devices 5 can make the nickel foam 200 and bipolar plate 300 firmly placed on the rotary table 11; the clamping devices 5 are arranged on the edge of the rotary table 11 to prevent the clamping devices 5 from affecting the welding work.

[0064] like Figure 1-3 As shown, the pressure plate 4 is provided with multiple air inlet pipes 41, which pass through the pressure plate 4 to deliver argon or nitrogen to the welding area 43.

[0065] In this embodiment, the argon or nitrogen gas introduced into the welding environment can isolate the air and prevent oxidation. Oxidizing compounds will reduce the strength, toughness and corrosion resistance of the weld line.

[0066] like Figure 1-3 As shown, the welding device 100 also includes a positioning mechanism 6, which is fixed on the rotary table 11 and is used to position the nickel foam 200 and the bipolar plate 300.

[0067] In this embodiment, the positioning mechanism 6 is useful for positioning the nickel foam 200 and the bipolar plate 300, and can make it easier to position the nickel foam 200 and the bipolar plate 300 on the rotary table 11. This can improve welding efficiency and ensure the accuracy of the welding position of the laser welding machine 2.

[0068] It should be noted that the positioning mechanism 6 can rotate together with the rotary table 11.

[0069] like Figure 1-3 As shown, multiple positioning mechanisms 6 are evenly spaced along the circumferential direction of the rotary table 11 at the edge of the rotary table 11.

[0070] When the rotary table 11 rotates to the point where the positioning mechanism 6 and the laser welding machine 2 are on the same radial line as the rotary table 11, the laser welding machine 2 corresponds to the welding area 43 of the nickel foam 200 and the bipolar plate 300, and performs welding on the welding area 43.

[0071] In this embodiment, multiple positioning mechanisms 6 indicate multiple welding areas 43. This arrangement allows the nickel foam 200 and the bipolar plate 300 to be firmly welded together. Moreover, when the positioning mechanisms are on the same radial line as the laser welding machine 2 on the rotary table 11, the position of the welding area 43 can be marked for welding. In addition, the positioning mechanisms 6 are evenly arranged on the edge of the rotary table 11 to prevent the positioning mechanisms 6 from affecting the welding work, while ensuring the balance of the worktable 1.

[0072] It should be noted that there are preferably four positioning mechanisms 6, and correspondingly, there are also four welding areas 43; and when the positioning mechanism 6 is aligned with the laser welding machine 2, the welding area 43 is determined.

[0073] like Figure 1-3 As shown, along the circumferential direction of the rotary table 11, the width of the welding area 43 is less than the width between two adjacent clamping devices 5.

[0074] In this embodiment, the above-mentioned arrangement ensures that the welding area 43 is completely covered by the area between the two adjacent pressing devices 5. In other words, the welding work is carried out in the area where the nickel foam 200 and the bipolar plate 300 are pressed particularly stably, resulting in a good welding effect. In addition, this arrangement allows the size of the laser welding machine 2 to be set relatively small, thus occupying less space.

[0075] like Figure 1-3 As shown, the pressure plate 4 is provided with a handle 42, and pushing the handle 42 can make the rotary table 11 rotate.

[0076] In this embodiment, the handle 42 makes it easier for the operator to apply force to the pressure plate 4, thereby reducing the operator's labor intensity and making it more conducive to the rotation of the rotary table 11. In addition, as mentioned above, when the rotating mechanism 3 is an intelligent rotating mechanism and a malfunction occurs, the handle 42 can still make the rotary table 11 rotate.

[0077] It should be noted that the handle 42 can also be replaced by other mechanisms that can make the rotary table 11 rotate, and the handle 42 can also be set on the worktable 1 or the clamping device 5.

[0078] In addition, such as Figure 1 As shown, the working process of the welding device 100 is as follows:

[0079] 1. Using the positioning mechanism 6, place the bipolar plate 300 and the nickel foam 200 on the rotating table 11 in sequence. The bipolar plate 300 is stacked on top of the nickel foam 200. Place the pressure plate 4 on top of the bipolar plate 300 to press down the bipolar plate 300 and the nickel foam 200. Finally, use the clamping device 5 to press them down.

[0080] 2. Using the positioning mechanism 6 to align with the laser welding machine 2, the welding area 43 of the bipolar plate 300 and the foamed nickel 200 is positioned.

[0081] 3. Connect the argon inlet pipe 41 to the pressure plate 4, adjust the output gas pressure, and deliver argon or nitrogen to the welding area of ​​the foam nickel 200 and the bipolar plate 300.

[0082] 4. Turn on the laser of laser welding machine 2, check the welding point, and start welding;

[0083] 5. Push the handle 42 to rotate the rotating table 11 around the base 12, or start the rotating mechanism to make the rotating table 11 rotate around the base 12, and perform welding in the welding areas 43 located by the four positioning mechanisms 6 in sequence;

[0084] 6. Check the welding results, loosen the clamping device 5, and take out the product.

[0085] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0086] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A welding apparatus for welding nickel foam and bipolar plates, characterized in that, The welding device includes a worktable and a laser welding machine. The worktable includes a rotary table and a base. The rotary table is disposed on the base, and the laser welding machine is fixed on the base. The rotary table is used to place the nickel foam and the bipolar plate, with the bipolar plate stacked on top of the nickel foam. The laser welding machine is used to weld the nickel foam and the bipolar plate. The rotary table is rotatable relative to the base to provide multiple welding areas.

2. The welding apparatus as described in claim 1, characterized in that, The welding device further includes a rotating mechanism, one end of which is connected to the rotating table and the other end is connected to the base, and is located between the rotating table and the base.

3. The welding apparatus as described in claim 1, characterized in that, The welding apparatus further includes a pressure plate that covers the bipolar plate to apply pressure to the nickel foam and the bipolar plate.

4. The welding apparatus as described in claim 3, characterized in that, The welding apparatus further includes a clamping device, which is mounted on the rotating table and acts on the pressure plate.

5. The welding apparatus as described in claim 4, characterized in that, The clamping device is configured as a plurality of devices, which are evenly spaced along the circumferential direction of the rotary table at the edge of the rotary table.

6. The welding apparatus as described in claim 3, characterized in that, The pressure plate is provided with multiple air inlet pipes, which pass through the pressure plate to deliver argon or nitrogen gas to the welding area.

7. The welding apparatus as described in claim 4, characterized in that, The welding apparatus further includes a positioning mechanism, which is fixed on the rotating table and used to position the nickel foam and the bipolar plate.

8. The welding apparatus as described in claim 7, characterized in that, in, The positioning mechanism is configured as a plurality of them, and the plurality of positioning mechanisms are evenly spaced along the circumferential direction of the rotary table at the edge of the rotary table; When the rotary table rotates to the point where any of the positioning mechanisms and the laser welding machine are on the same radial line of the rotary table, the rotary table is configured to stop rotating, and the laser welding machine corresponds to the welding area of ​​the nickel foam and the bipolar plate, and performs welding on the current welding area; The rotary table is configured to resume rotation after the laser welding machine completes welding of the current welding area, until the next positioning mechanism is on the same radial line as the laser welding machine on the rotary table.

9. The welding apparatus as described in claim 8, characterized in that, Along the circumferential direction of the rotary table, the width of the welding area is less than the width between two adjacent clamping devices.

10. The welding apparatus as described in claim 5, characterized in that, The pressure plate is equipped with a handle, which can be operated to drive the rotary table to rotate.

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