A welding device and welding apparatus

Abstract

The application provides a welding device and welding equipment, comprising a lifting mechanism, a mounting rack, a heating plate and a plurality of pressing needles, wherein: the mounting rack is connected to the driving end of the lifting mechanism, and the lifting mechanism is used to drive the mounting rack to lift; the heating plate is connected to the mounting rack, and the bottom of the heating plate is provided with a flat heating surface; the plurality of pressing needles are arranged in the heating plate in an up-and-down floating manner, the pressing needles are arranged in rows, and under the action of no external force, the pressing surface of the pressing needles protrudes downward from the heating surface; when the lifting mechanism drives the mounting rack to descend, each row of pressing needles is used to press a corresponding welding strip and a battery piece together, and the pressing needles avoid the welding points on the battery piece; and the heating plate is used to press the battery piece to the welding strip through the heating surface and heat the battery piece. The welding device of the application can arrange the pressing needles in the heating plate in an up-and-down floating manner, and after the pressing needles press the battery piece and the welding strip downward, the heating plate can continue to descend until it is tightly attached to the battery piece. The battery piece is heated in a contact mode by the heating plate, and the heating uniformity can be improved.

Description

Technical Field

[0001] This application relates to the field of photovoltaic equipment, specifically a welding apparatus and welding equipment. Background Technology

[0002] During the battery string welding process, after the solder joints of the battery cells are made, the battery cells and solder strips are arranged in a predetermined order and the solder strips cover the solder joints of the corresponding battery cells.

[0003] Existing welding equipment typically includes a light box containing lamps. The lamps are spaced above the solar cells and welding strips. The infrared light emitted by the lamps welds the welding strips and solar cells. However, due to the certain distance between the lamps and the solar cells and welding strips, the energy emitted by the lamps is affected by the external environment and will be lost to varying degrees, resulting in uneven welding temperature and affecting the welding quality of the solar cells and welding strips. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a welding apparatus, the detailed technical solution of which is as follows:

[0005] A welding apparatus includes a lifting mechanism, a mounting frame, a heating plate, and a plurality of pressure pins, wherein:

[0006] The mounting bracket is connected to the drive end of the lifting mechanism, which is used to drive the mounting bracket to move up and down.

[0007] The heating plate is connected to the mounting bracket, and the bottom of the heating plate has a flat heating surface;

[0008] Several pressure pins are floating up and down inside the heating plate. The pressure pins are arranged in a row, and when no external force is applied, the pressing surface of the pressure pins protrudes downward from the heating surface.

[0009] When the lifting mechanism drives the mounting frame to descend, each row of pressure pins is used to press a corresponding welding strip and battery cell together, and the pressure pins avoid the welding points on the battery cell. The heating plate is used to press the battery cell onto the welding strip and heat the battery cell through the heating surface.

[0010] The welding apparatus provided in this application features a pressure pin on the heating plate that can float up and down. Therefore, after the pressure pin presses down to clamp the battery cell and welding strip, the heating plate can continue to descend until its heating surface is in close contact with the battery cell. This allows the heating plate to perform contact heating of the battery cell, reducing heat loss, improving heating uniformity, and ultimately enhancing the welding effect.

[0011] In some embodiments, the heating plate is provided with a plurality of stepped holes that penetrate the heating plate vertically and correspond one-to-one with the pressure needles, and the pressure needles are inserted into the corresponding stepped holes; the upper end of the pressure needle extends upward out of the stepped hole, and the upper end of the pressure needle is provided with a first limiting sleeve, the diameter of the first limiting sleeve being larger than the diameter of the upper opening of the stepped hole, and the lower end of the pressure needle having a pressing part that protrudes outward from the side wall of the pressure needle; a first spring is sleeved on the pressure needle, the upper end of the first spring abutting against the stepped surface of the stepped hole, and the lower end of the first spring abutting against the pressing part of the pressure needle; when the pressing part of the pressure needle presses the battery cell, the first spring is compressed and contracts, and the pressing part of the pressure needle retracts upward into the stepped hole; when the pressing part of the pressure needle releases the battery cell, the first spring is depressurized and rebounds, and the pressing part of the pressure needle extends downward out of the stepped hole.

[0012] By configuring the installation method of the pressure pin and fitting a first spring onto it, the pressure pin can elastically press against the battery cell at the corresponding welding strip, ensuring sufficient pressure while preventing damage to the battery cell. Furthermore, when the pressure pin presses against the battery cell, it retracts upwards into the stepped hole, ensuring the heating surface of the heating plate is in close contact with the battery cell. When the pressure pin releases the battery cell, the first spring depressurizes and rebounds, pushing the pressure pin's pressing part downwards back out of the stepped hole, achieving automatic reset.

[0013] In some embodiments, a heating rod is provided inside the heating plate; or, an electromagnetic heating component is provided inside the heating plate; or, a heating wire is wound inside the heating plate; or, graphene is etched on the heating plate.

[0014] Several heating structures are provided for heating a heating plate. Among them, heating rods, heating wires, and graphene, when energized, generate Joule heat due to their own resistance, thus heating the heating plate. Graphene, as an ultra-thin two-dimensional material, etched onto the upper surface of the heating plate, can significantly improve the heating uniformity. When the electromagnetic heating component is energized, it uses an alternating magnetic field to generate eddy currents within the heating plate to heat it, also achieving uniform heating.

[0015] In some embodiments, the heating plate is vertically and horizontally connected to the mounting bracket via at least two floating connection components.

[0016] Since the heating plate can be connected to the mounting bracket by at least two floating connection components, it can adaptively deflect and float according to the force when pressed onto the battery cell, ultimately ensuring that the heating surface of the heating plate can be horizontally and tightly attached to the battery cell.

[0017] In some embodiments, the floating connection assembly includes a connecting seat, a guide pin, and a second spring, wherein: the connecting seat is fixedly connected to the heating plate, and the connecting seat is provided with a guide hole and a floating hole that pass through vertically, the guide hole being arranged above the floating hole, wherein the diameter of the guide hole is smaller than the diameter of the floating hole; the upper end of the guide pin is fixedly connected to the mounting bracket, and the lower end of the guide pin is provided with a limiting head that protrudes outward from the side wall of the guide pin, the limiting head being located in the floating hole and being able to move up and down in the floating hole, the diameter of the limiting head being larger than the diameter of the guide hole; the second spring is sleeved on the guide pin, the upper end of the second spring abutting against the mounting bracket, and the lower end of the second spring abutting against the connecting seat.

[0018] By configuring the floating connection components, the heating plate can be suspended floatingly on the mounting frame under the elastic pull of the floating connection components.

[0019] In some embodiments, there are gaps between the guide pin and the inner wall of the guide hole, and between the limiting head of the guide pin and the inner wall of the floating hole.

[0020] It provides deflection space for the heating plate, ensuring that the heating plate can smoothly deflect and float 360°.

[0021] In some embodiments, the connector includes a heat insulation block and a connecting block, wherein: the heat insulation block is fixedly connected to the heating plate, and a first through hole is provided in the heat insulation block; the connecting block is fixedly connected to the heat insulation block, and a guide hole and a second through hole are provided on the connecting block, the guide hole is arranged above the second through hole, and the second through hole and the first through hole are vertically connected to form a floating hole.

[0022] This achieves heat insulation between the heating plate and other mechanisms above it, preventing the heating plate from heating the other mechanisms above.

[0023] In some embodiments, the connecting block is detachably mounted on the heat insulation block to facilitate the disassembly and maintenance of the heating plate.

[0024] In some embodiments, the lifting mechanism includes a frame and a lifting drive unit mounted on the frame, wherein the mounting frame is slidably connected to the frame and connected to the drive end of the lifting drive unit, and the lifting drive unit is used to drive the mounting frame to slide up and down on the frame.

[0025] It improves the stability of the mounting bracket during lifting and prevents the mounting bracket from deflecting.

[0026] This application also provides a welding device, including a heating table and the welding apparatus described in any of the above claims. The heating table is located below the welding apparatus and is used to support and heat the battery cell and the welding strip. The welding strip is located below the battery cell, and the welding apparatus is used to weld the battery cell and the welding strip on the heating table.

[0027] The welding equipment provided in this application allows the welding device to press down on the battery cells and welding strip after the welding strip and battery cells are laid on the heating table. The heating surface of the heating plate of the welding device can be pressed against the battery cells to perform contact heating, thereby improving the heating uniformity and ultimately improving the welding effect of the welding strip. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the welding apparatus in an embodiment of this application from one viewpoint.

[0029] Figure 2 This is a schematic diagram of the welding apparatus in an embodiment of this application from another perspective;

[0030] Figure 3 This is a schematic diagram of the mounting bracket and heating plate in an embodiment of this application from one view.

[0031] Figure 4 This is a schematic diagram of the mounting bracket and heating plate in an embodiment of this application from another perspective;

[0032] Figure 5 This is a cross-sectional view of the mounting bracket and heating plate in an embodiment of this application.

[0033] Figure 6 for Figure 5 A magnified view of a portion of region A in the middle;

[0034] Figure 7 This is a schematic diagram of the structure of the heat insulation block in the embodiments of this application;

[0035] Figure 8 This is a schematic diagram of the connection block in an embodiment of this application.

[0036] Figures 1 to 8 Includes:

[0037] Lifting mechanism 1, frame 11, lifting drive unit 12;

[0038] Mounting bracket 2;

[0039] Heating plate 3, stepped hole 31;

[0040] 4. Pressing needle; 41. First limiting sleeve; 42. Pressing part;

[0041] First spring 5;

[0042] Floating connection assembly 6, connecting seat 61, guide pin 62, second spring 63, heat insulation block 611, connecting block 612, guide hole 613, floating hole 614, limit head 621;

[0043] 100 solar cells, 200 welding strips. Detailed Implementation

[0044] To make the above-mentioned objects, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0045] like Figures 1 to 5 As shown, the welding apparatus of this application includes a lifting mechanism 1, a mounting frame 2, a heating plate 3, and several pressure pins 4, wherein:

[0046] Mounting bracket 2 is connected to the drive end of lifting mechanism 1, which is used to drive mounting bracket 2 to rise and fall.

[0047] The heating plate 3 is connected to the mounting bracket 2, and the bottom of the heating plate 3 has a flat heating surface.

[0048] Several pressure pins 4 are floating up and down inside the heating plate 3. The pressure pins 4 are arranged in a row, and the pressing surface of the pressure pins 4 protrudes downward from the heating surface when no external force is applied.

[0049] When the lifting mechanism 1 drives the mounting frame 2 to descend, each row of pressure pins 4 is used to press a corresponding welding strip 200 and the battery cell together, and the pressure pins 4 avoid the welding points on the battery cell. The heating plate 3 is used to press the battery cell onto the welding strip and heat the battery cell through the heating surface.

[0050] The welding apparatus provided in this application can be used to weld battery strings. During welding, the welding strip in the battery string is located below the battery cells. The pressure pins 4 on the heating plate 3 can be floated up and down on the heating plate 3. Therefore, after the pressure pins 4 press down to press the battery cells and welding strips 200, the heating plate 3 can continue to descend until the heating surface of the heating plate 3 is in close contact with the battery cells. In this way, the heating plate 3 can perform contact heating of the battery cells, reduce heat loss, improve heating uniformity, and ultimately improve the welding effect.

[0051] When the pressure pin 4 presses down on the battery cell, it avoids the solder joints on the battery cell. This way, after the heating surface of the heating plate 3 presses against the battery cell, the heating surface can face the solder joints to fully heat the solder joints and ensure the welding effect.

[0052] like Figures 5 to 6 As shown, optionally, the heating plate 3 is provided with a plurality of stepped holes 31 that penetrate the heating plate 3 vertically and correspond one-to-one with the pressure needles 4, and the pressure needles 4 are inserted into the corresponding stepped holes 31.

[0053] The upper end of the pressure needle 4 extends upward through the stepped hole 31. A first limiting sleeve 41 is provided at the upper end of the pressure needle 4. The diameter of the first limiting sleeve 41 is larger than the diameter of the upper opening of the stepped hole 31. The lower end of the pressure needle 4 has a pressing part 42 that protrudes outward from the side wall of the pressure needle 4. The pressing part 42 is a cylinder with a diameter larger than that of the pressure needle 4. A first spring 5 is sleeved on the pressure needle 4. The upper end of the first spring 5 abuts against the stepped surface of the stepped hole 31, and the lower end of the first spring 5 abuts against the pressing part 42 of the pressure needle 4. When the pressing part 42 of the pressure needle 4 presses the battery cell, the first spring 5 is compressed and retracts, and the pressing part 42 of the pressure needle 4 retracts upward into the stepped hole 31. When the pressing part 42 of the pressure needle 4 releases the battery cell, the first spring 5 is depressurized and rebounds, and the pressing part 42 of the pressure needle 4 extends downward again through the stepped hole 31 under the push of the first spring 5.

[0054] By setting the installation method of the pressure needle 4 and sleeve the first spring 5 on the pressure needle 4, the pressure needle 4 can elastically press the battery cell at the corresponding welding strip, thus preventing the pressure needle 4 from damaging the battery cell while ensuring the pressing force.

[0055] Furthermore, when the pressing part 42 of the pressing needle 4 presses the battery cell, it is pressed upward and retracts into the stepped hole 31, thereby ensuring that the heating plate 3 can continue to descend until the heating surface of the heating plate 3 is in close contact with the battery cell, thus implementing contact heating of the battery cell. When the pressing part 42 of the pressing needle 4 releases the battery cell, the first spring 5 loses pressure and rebounds, which can push the pressing part 42 of the pressing needle 4 to extend downward again into the stepped hole 31, realizing automatic reset.

[0056] In order to enable the heating plate 3 to have heating performance, a heating rod is provided inside the heating plate 3; or, an electromagnetic heating component is provided inside the heating plate 3; or, a heating wire is wound inside the heating plate 3; or, graphene is etched on the heating plate 3.

[0057] When electricity is applied, the heating rods, heating wires, and graphene generate Joule heat due to their own resistance, which heats the heating plate 3. Uniform heating of the heating plate 3 can be achieved by evenly distributing multiple heating rods within it, or by evenly winding the heating wires along an S-shaped path within it. Furthermore, as an ultrathin two-dimensional material, the uniformity of heating the heating plate 3 can be further enhanced by uniformly etching graphene onto its upper surface.

[0058] When the electromagnetic heating component is powered on, it uses an alternating magnetic field to generate eddy currents in the heating plate 3 to heat the heating plate 3, and it can also achieve uniform heating of the heating plate 3.

[0059] like Figures 3 to 5 As shown, optionally, the heating plate 3 can be connected to the mounting bracket 2 in a floating manner via at least two (e.g., the two in the figure) floating connection assemblies 6.

[0060] Since the heating plate 3 can be connected to the mounting frame 2 by at least two floating connection components 6, the heating plate 3 can generate adaptive deflection and floating according to the force when pressed onto the battery cell, thus ensuring that the heating surface of the heating plate 3 is tightly attached to the battery cell, further improving the heating uniformity of the battery cell.

[0061] Optionally, the floating connection assembly 6 includes a connecting seat 61, a guide pin 62, and a second spring 63. The connecting seat 61 is fixedly connected to the heating plate 3. The connecting seat 61 has a vertically penetrating guide hole 613 and a floating hole 614. The guide hole 613 is positioned above the floating hole 614, and its diameter is smaller than that of the floating hole 614. The upper end of the guide pin 62 is fixedly connected to the mounting bracket 2. The lower end of the guide pin 62 has a limiting head 621 protruding outward from the side wall of the guide pin 62. The limiting head 621 is also a cylinder with a diameter larger than that of the guide pin 62. The limiting head 621 is located within the floating hole 614 and can move vertically within the floating hole 614. The diameter of the limiting head 621 is larger than that of the guide hole 613. The second spring 63 is sleeved on the guide pin 62. The upper end of the second spring 63 abuts against the mounting bracket 2, and the lower end of the second spring 63 abuts against the connecting seat 61.

[0062] By configuring the floating connection component 6, the heating plate 3 can be suspended on the mounting frame 2 in a floating manner under the elastic pull of the floating connection component 6.

[0063] Optionally, gaps exist between the guide pin 62 and the inner wall of the guide hole 613, and between the limiting head 621 of the guide pin 62 and the inner wall of the floating hole 614. This arrangement allows the guide pin 62 to swing to a certain extent, thereby providing deflection space for the heating plate 3 and ensuring that the heating plate 3 can achieve 360° deflection and floating.

[0064] like Figure 3 , Figure 5 and Figures 7 to 8 As shown, optionally, the connecting base 61 includes a heat insulation block 611 and a connecting block 612, wherein: the heat insulation block 611 is fixedly connected to the heating plate 3, and a first through hole A is provided in the heat insulation block 611. The connecting block 612 is fixedly connected to the heat insulation block 611, and a guide hole 613 and a second through hole B are provided on the connecting block 612. The guide hole 613 is arranged above the second through hole B, and the second through hole B and the first through hole A are vertically connected to form a floating hole 614.

[0065] By setting the connecting seat 61 as a split structure consisting of heat insulation block 611 and connecting block 612, heat insulation block 611 can thermally isolate the heating plate 3 from other mechanisms above, preventing the heating plate 3 from heating other mechanisms above and reducing heat loss of the heating plate 3.

[0066] The insulation block 611 can be, for example, a PEEK (polyether ether ketone) block, a PTFE (polytetrafluoroethylene) block, or an epoxy resin block.

[0067] Optionally, the connecting block 612 can be detachably mounted on the heat insulation block 611. For example, both the heat insulation block 611 and the connecting block 612 have screw holes, and the connecting block 612 is fixed to the heat insulation block 611 by bolts or screws.

[0068] This setup allows for easy disassembly and maintenance of the heating plate 3.

[0069] Of course, the floating connection assembly 6 can also use other existing elastic connection components capable of deflection and floating, such as a guide post spring consisting of a spring and a guide post. Specifically, the mounting bracket 2 is provided with a through hole, through which the guide post can be raised and lowered onto the mounting bracket 2. The upper end of the guide post extends upward through the mounting bracket 2, and the upper end of the guide post has a second limiting sleeve for limiting its position. The diameter of the second limiting sleeve is larger than the inner diameter of the through hole on the mounting bracket 2. The second limiting sleeve can prevent the guide post from falling off the mounting bracket 2. The lower end of the guide post is fixedly connected to the heating plate 3, and the spring is sleeved on the guide post. The two ends of the spring abut against the mounting bracket 2 and the heating plate 3, respectively. In addition, there is a gap between the guide post and the inner wall of the through hole.

[0070] like Figures 1 to 2 As shown, optionally, the lifting mechanism 1 includes a frame 11 and a lifting drive unit 12 mounted on the frame 11. The mounting frame 2 is slidably connected to the frame 11 and connected to the drive end of the lifting drive unit 12. The lifting drive unit 12 drives the mounting frame 2 to slide and move up and down on the frame 11. To ensure smooth lifting of the mounting frame 2, a linear guide rail pair can be provided between the mounting frame 2 and the frame 11. The linear guide rail pair guides the lifting of the mounting frame 2, thus improving the stability of the lifting of the mounting frame 2 and preventing deflection during lifting.

[0071] The lifting mechanism 1 can adopt various existing linear drive mechanisms that can drive the mounting frame 2 to lift and slide, such as a screw drive mechanism consisting of a motor, a lead screw and a lead screw nut, or the lifting mechanism 1 can directly adopt a cylinder or an electric cylinder.

[0072] This application also provides a welding device, including a heating table and the welding apparatus in any of the above embodiments. The heating table is located below the welding apparatus and is used to support and heat the battery cell and the welding strip. The welding strip is located below the battery cell, and the welding apparatus is used to weld the battery cell and the welding strip on the heating table.

[0073] The welding equipment provided in this application, after the welding strip and battery cell are laid on the heating platform, allows the pressure pin 4 of the welding device to press down firmly on the battery cell and welding strip, while the heating surface of the heating plate 3 of the welding device can adhere closely to the battery cell to perform contact heating, thereby improving heating uniformity and ultimately enhancing the welding effect. Heating rods and other heating devices can be embedded inside the heating platform to achieve the heating function, and the heating platform can assist in heating the welding strip and battery cell to aid in welding.

[0074] This application provides a sufficiently detailed and specific description. Those skilled in the art should understand that the descriptions in the embodiments are merely exemplary, and all changes made without departing from the true spirit and scope of this application should fall within its protection scope. The scope of protection claimed in this application is defined by the claims, not by the above descriptions in the embodiments. Without contradiction, some optional components in one embodiment can also be used in another embodiment, and some preferred structures of the same component in one embodiment are also applicable to another embodiment. Furthermore, there may be slight differences in the wording of the names of certain components in different embodiments; these slight differences will not affect the understanding of the technical solution of the present invention by those skilled in the art.

Claims

1. A welding apparatus, characterized in that, The welding device includes a lifting mechanism, a mounting frame, a heating plate, and several pressure pins, wherein: The mounting bracket is connected to the drive end of the lifting mechanism, which is used to drive the mounting bracket to move up and down. The heating plate is connected to the mounting bracket, and the bottom of the heating plate has a flat heating surface; A plurality of pressure pins are floatingly disposed within the heating plate. The pressure pins are arranged in a row, and when no external force is applied, the pressing surface of the pressure pins protrudes downward from the heating surface. When the lifting mechanism drives the mounting frame to descend, each row of pressure pins is used to press a corresponding welding strip and battery cell together, and the pressure pins avoid the welding points on the battery cell. The heating plate is used to press the battery cell onto the welding strip and heat the battery cell through the heating surface.

2. The welding apparatus as described in claim 1, characterized in that, The heating plate is provided with a plurality of stepped holes that penetrate the heating plate vertically and correspond one-to-one with the pressure needles, and the pressure needles are inserted into the corresponding stepped holes; The upper end of the pressure needle extends upward through a stepped hole, and a first limiting sleeve is provided at the upper end of the pressure needle. The diameter of the first limiting sleeve is larger than the diameter of the upper opening of the stepped hole. The lower end of the pressure needle has a pressing part that protrudes outward from the side wall of the pressure needle. A first spring is sleeved on the pressure needle, with the upper end of the first spring abutting against the stepped surface of the stepped hole and the lower end of the first spring abutting against the pressing part of the pressure needle. When the pressing part of the pressure needle presses the battery cell, the first spring is compressed and contracts, and the pressing part of the pressure needle retracts upward into the stepped hole; When the pressing part of the pressure needle releases the battery cell, the first spring loses pressure and rebounds, and the pressing part of the pressure needle extends downward out of the stepped hole.

3. The welding apparatus as described in claim 1, characterized in that, The heating plate is provided with a heating rod; or, the heating plate is provided with an electromagnetic heating component; or, the heating plate is wound with a heating wire; or, the heating plate is etched with graphene.

4. The welding apparatus as described in claim 1, characterized in that, The heating plate is connected to the mounting bracket by at least two floating connection components, allowing it to float up and down.

5. The welding apparatus as described in claim 4, characterized in that, The floating connection assembly includes a connecting seat, a guide pin, and a second spring, wherein: The connecting seat is fixedly connected to the heating plate. The connecting seat is provided with a guide hole and a floating hole that pass through vertically. The guide hole is arranged above the floating hole, wherein the diameter of the guide hole is smaller than the diameter of the floating hole. The upper end of the guide pin is fixedly connected to the mounting bracket, and the lower end of the guide pin is provided with a limiting head that protrudes outward from the side wall of the guide pin. The limiting head is located in the floating hole and can move up and down in the floating hole. The diameter of the limiting head is larger than the diameter of the guide hole. The second spring is sleeved on the guide pin, with its upper end abutting against the mounting bracket and its lower end abutting against the connecting seat.

6. The welding apparatus as described in claim 5, characterized in that, There are gaps between the guide pin and the inner wall of the guide hole, and between the limiting head of the guide pin and the inner wall of the floating hole.

7. The welding apparatus as described in claim 5, characterized in that, The connecting base includes a heat insulation block and a connecting block, wherein: The heat insulation block is fixedly connected to the heating plate, and a first through hole is provided inside the heat insulation block; The connecting block is fixedly connected to the heat insulation block. The connecting block is provided with a guide hole and a second through hole that are vertically connected. The guide hole is arranged above the second through hole, and the second through hole and the first through hole are vertically connected to form the floating hole.

8. The welding apparatus as described in claim 7, characterized in that, The connecting block is detachably mounted on the heat insulation block.

9. The welding apparatus as claimed in claim 1, characterized in that, The lifting mechanism includes a frame and a lifting drive unit mounted on the frame. The mounting bracket is slidably connected to the frame and connected to the drive end of the lifting drive unit. The lifting drive unit is used to drive the mounting bracket to slide up and down on the frame.

10. A welding device, characterized in that, The device includes a heating table and a welding apparatus as described in any one of claims 1-9, wherein the heating table is located below the welding apparatus, the heating table is used to support and heat the battery cell and the welding strip, the welding strip is located below the battery cell, and the welding apparatus is used to weld the battery cell and the welding strip on the heating table.

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