Welding device and welding system

Abstract

The utility model provides a welding device and a welding system, and belongs to the technical field of batteries. The welding device comprises a base part and a pressing head assembly. The base part is used for supporting a first to-be-welded part and a second to-be-welded part which are stacked, and the second to-be-welded part is located above the first to-be-welded part; the pressure head assembly comprises a sleeve piece, a lens piece and a negative pressure pipeline; the sleeve part is located above the base part, and a welding opening in the bottom end of the sleeve part abuts against the top face of a second to-be-welded part in a sealed mode. The lens part is embedded in the sleeve part, and the lens part is used for transmitting the laser beam so that the laser beam can irradiate a second to-be-welded part in the welding opening; the negative pressure pipeline is connected with the sleeve piece and used for vacuumizing the interior of the sleeve piece. According to the welding device, slag splashing and weld joint air holes can be reduced, the fusion depth can be greatly increased, the required fusion depth can be achieved with low laser power, and therefore heat input generated during laser welding is greatly reduced, and the welding cost is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a welding apparatus and welding system. Background Technology

[0002] In related technologies, battery covers and electrodes are usually connected by laser welding. However, during the laser welding process, metal spatter is inevitable. The scattered spatter may fall between the electrodes and cause short circuit risk, posing a safety hazard to the battery product. Utility Model Content

[0003] This application provides a welding apparatus and welding system that can solve the problem of metal spatter during laser welding of battery cover plates and electrode sheets.

[0004] The technical solution is as follows:

[0005] On the one hand, a welding apparatus is provided, the welding apparatus comprising: a base member and a pressure head assembly;

[0006] The base component is used to support the stacked first and second components to be welded, with the second component to be welded located above the first component to be welded.

[0007] The pressure head assembly includes a sleeve, a lens, and a negative pressure pipeline;

[0008] The sleeve is located above the base, and the weld joint at the bottom end of the sleeve is sealed against the top surface of the second part to be welded.

[0009] The lens element is embedded in the sleeve element, and the lens element is used to transmit a laser beam so that the laser beam irradiates the second workpiece to be welded inside the welding joint;

[0010] The negative pressure pipeline is connected to the sleeve, and the negative pressure pipeline is used to evacuate the inside of the sleeve.

[0011] In some embodiments, the sleeve is further provided with a first flexible sealing ring, which is located outside the weld joint.

[0012] In some embodiments, the first flexible sealing ring is trumpet-shaped.

[0013] In some embodiments, the axis of the sleeve is perpendicular to the top surface of the second part to be welded, and the weld joint and the lens part are located at the two ends of the axial direction of the sleeve.

[0014] In some embodiments, the pressure head assembly further includes a mounting flange located on the outside of the lens element, and the mounting flange is coaxially and fixedly connected to the sleeve element.

[0015] In some embodiments, the pressure head assembly further comprises a second flexible sealing ring, which is located between at least two of the lens piece, the sleeve piece and the mounting flange.

[0016] In some embodiments, the welding device further comprises a lifting assembly, the pressure head assembly is connected with the lifting assembly, and the lifting assembly is used to drive the pressure head assembly to ascend or descend.

[0017] In some embodiments, the lifting assembly comprises a lifting plate and a lifting driving unit, the lifting plate is located above the base piece, and the pressure head assembly is connected with the lifting plate; the lifting plate is connected with the lifting driving unit, and the lifting driving unit is used to drive the lifting plate to ascend or descend.

[0018] In some embodiments, the first piece to be welded is a battery cover plate, the second piece to be welded is an adapter connecting piece, the battery cover plate is provided with a pole column, the adapter connecting piece is welded with the pole column, and the adapter connecting piece is used to connect a pole piece.

[0019] In another aspect, a welding system is provided, which comprises the welding device described in the application and a laser welder.

[0020] The technical scheme provided in the application has at least the following beneficial effects:

[0021] In the welding device, the first piece to be welded and the second piece to be welded are stacked on the base piece, the sleeve piece is sealed against the second piece to be welded, the sleeve piece is surrounded by itself and the second piece to be welded to form a sealed space, the sealed space is vacuumized by the negative pressure pipeline, a local vacuum environment is created in the welding area of the second piece to be welded, the laser beam of the laser welder can be transmitted to the welding area of the second piece to be welded through the lens piece without obstruction, and the second piece to be welded and the first piece to be welded are laser welded in the vacuum environment, so that the gas interference and oxidation effect can be eliminated, thereby being beneficial to reducing the spatter of molten slag, weld pores and greatly improving the penetration, so that the required penetration can be achieved with lower laser power, thereby greatly reducing the heat input generated during laser welding and reducing the welding cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical schemes in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 FIG. 1 is a structural schematic diagram of a welding device provided by an embodiment of the present application;

[0024] Figure 2 FIG. 2 is an exploded structural diagram of the welding device provided by the embodiment of the present application;

[0025] Figure 3 FIG. 3 is a partial structural schematic diagram of a sleeve provided by the embodiment of the present application;

[0026] Figure 4 FIG. 4 is a connection structural schematic diagram of the sleeve, a lens and a mounting flange provided by the embodiment of the present application;

[0027] Figure 5 FIG. 5 is a structural schematic diagram of a welding device provided by another embodiment of the present application;

[0028] Figure 6 FIG. 6 is a structural schematic diagram of a first piece to be welded provided by the embodiment of the present application.

[0029] The reference signs in the drawings represent respectively:

[0030] 100, a first piece to be welded;

[0031] 100a, an inner side surface; 100b, an outer side surface;

[0032] 1001, a pole; 1002, a plastic support; 1003, a metal cover plate;

[0033] 200, a second piece to be welded;

[0034] 300, a laser beam;

[0035] 1, a base piece;

[0036] 11, a positioning groove; 12, a support block;

[0037] 2, a pressure head assembly;

[0038] 21, a sleeve; 2101, a welding port; 211, a first flexible sealing ring; 212, a flange fixing portion; 213, a stepped mounting portion; 22, a lens; 23, a negative pressure pipeline; 24, a mounting flange; 25, a second flexible sealing ring; 26, a first mounting screw; 27, a second mounting screw;

[0039] 3, a lifting assembly;

[0040] 31, a lifting plate; 32, a lifting driving unit; 33, a device base. DETAILED DESCRIPTION

[0041] The exemplary embodiments will be described in detail herein with reference to the attached drawings. In the following description, unless otherwise indicated, like numbers in the attached drawings refer to the same or similar elements. The following detailed description includes specific details for the purpose of providing a thorough understanding of the exemplary embodiments. However, it will be apparent to those skilled in the art that the exemplary embodiments can be practiced without these specific details. In some instances, well-known structures and components are not described in detail in order to avoid obscuring the understanding of the exemplary embodiments.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the drawings, and are only used for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Figure 1 The orientation or positional relationship shown is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] It should be understood that in the present application, "connected", "connected" can mean a mechanical connection relationship or a physical connection relationship, that is, A and B are connected or A and B are connected, which means that there is a fastening member (such as a screw, a bolt, a rivet, etc.) between A and B, or A and B are in contact with each other and A and B are difficult to separate.

[0044] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meaning as commonly understood by one of ordinary skill in the art.

[0045] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings.

[0046] In one aspect, in combination with Figure 1 and Figure 2 As shown in the drawings, the present embodiment provides a welding device, which comprises a base member 1 and a pressure head assembly 2.

[0047] The base member 1 is used to support the first and second to-be-welded members 100 and 200 in a stacked manner, and the second to-be-welded member 200 is located above the first to-be-welded member 100.

[0048] The pressure head assembly 2 comprises a sleeve piece 21, a lens piece 22 and a negative pressure pipeline 23; the sleeve piece 21 is located above the base piece 1, and a welded interface 2101 at the bottom end of the sleeve piece 21 is sealed and abuts on the top surface of the second to-be-welded piece 200; the lens piece 22 is embedded on the sleeve piece 21, and the lens piece 22 is used for transmitting the laser beam 300 so that the laser beam 300 irradiates on the second to-be-welded piece 200 in the welded interface 2101; and the negative pressure pipeline 23 is connected with the sleeve piece 21, and the negative pressure pipeline 23 is used for vacuumizing the inside of the sleeve piece 21.

[0049] The welding device of the embodiment is used for laser welding of the first to-be-welded piece 100 and the second to-be-welded piece 200, and the sleeve piece 21 is sealed and abuts on the second to-be-welded piece 200, so that the sleeve piece 21 is surrounded by itself and the second to-be-welded piece 200 to form a sealed space. The sealed space is vacuumized by the negative pressure pipeline 23, so that a local vacuum environment is created in the welding area of the second to-be-welded piece 200. At this time, the laser beam 300 of the laser welding machine can be transmitted to the welding area of the second to-be-welded piece 200 through the lens piece 22 without obstruction. Laser welding is performed on the second to-be-welded piece 200 and the first to-be-welded piece 100 in the vacuum environment, which can eliminate gas interference and oxidation effect, thereby being beneficial to reducing slag splashing and welding pores, improving product quality and safety performance of the welding product, and greatly improving the penetration depth. The required penetration depth can be achieved with lower laser power, thereby greatly reducing heat input generated during laser welding and reducing welding cost.

[0050] The advantages of laser welding in a vacuum environment mainly include the following aspects: inhibiting oxidation pollution, avoiding contact between the molten pool and air, forming a high-quality welding seam with more purity and no oxidation inclusion; reducing welding defects, reducing gas residues in the vacuum environment, and significantly reducing pores and cracks; improving energy utilization rate, eliminating air scattering and plasma interference on the laser, making energy more concentrated, and the welding seam penetration depth more stable; being suitable for special materials, especially suitable for welding of easily oxidized metals such as titanium, aluminum and magnesium, and high-precision electronic components, and being suitable for a wider range. In addition, vacuum welding does not require subsequent cleaning treatment, and the process is efficient and environmentally friendly.

[0051] In some possible implementations, the welding device is suitable for laser welding of a battery cover plate and an adapter connecting sheet of a cylindrical battery or a square battery (for reference Figure 6 The pole 1001 in the battery cover plate can be connected with the adapter metal sheet and the pole or the roll core inside the battery.

[0052] For example, when the welding device is used for soft welding of a square battery, the sleeve piece 21 is sealed and abuts on the second to-be-welded piece 200, and the sleeve piece 21 is surrounded by itself and the second to-be-welded piece 200 to form a sealed space. The sealed space is vacuumized by the negative pressure pipeline 23, so that a local vacuum environment is created in the welding area of the second to-be-welded piece 200. At this time, the laser beam 300 of the laser welding machine can be transmitted to the welding area of the second to-be-welded piece 200 through the lens piece 22 without obstruction. Laser welding is performed on the second to-be-welded piece 200 and the first to-be-welded piece 100 in the vacuum environment, which can eliminate gas interference and oxidation effect, thereby being beneficial to reducing slag splashing and welding pores, improving product quality and safety performance of the welding product, and greatly improving the penetration depth. The required penetration depth can be achieved with lower laser power, thereby greatly reducing heat input generated during laser welding and reducing welding cost. Figure 5As shown, the welding device includes two pressing head assemblies 2, and the positions of the two pressing head assemblies 2 correspond to the positive and negative electrode posts 1001 of the rectangular battery cover plate, so that the positive and negative electrode posts 1001 of the rectangular battery cover plate can be welded simultaneously.

[0053] In some possible implementation manners, the top surface of the base piece 1 is provided with a positioning groove 11, and the first and second pieces to be welded 100 and 200 are located in the positioning groove 11.

[0054] In some possible implementation manners, the lens piece 22 is a glass lens or a resin lens. The lens piece 22 can be a flat lens or an optical lens having a special light processing effect on the laser beam 300, for example, the lens piece 22 can be used to adjust the transmission direction, focal point position, focal length, and the like of the laser beam 300.

[0055] In combination with Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the sleeve piece 21 is further provided with a first flexible sealing ring 211 located outside the welding port 2101.

[0056] In order to improve the vacuum sealing property of the sleeve piece 21, especially the sealing property of the abutting gap between the sleeve piece 21 and the second piece to be welded 200, the first flexible sealing ring 211 is arranged outside the welding port 2101. When the negative pressure pipeline 23 performs vacuumization on the sleeve piece 21, a negative pressure cavity much lower than the external atmospheric pressure is formed inside the sleeve piece 21, the external atmospheric pressure will act on the first flexible sealing ring 211 and cause the first flexible sealing ring 211 to deform inwardly, and the first flexible sealing ring 211 is pressed against the top surface of the second piece to be welded 200 to completely seal the abutting gap between the sleeve piece 21 and the second piece to be welded 200.

[0057] In addition, the first flexible sealing ring 211 is arranged outside the welding port 2101, and the sidewall of the sleeve piece 21 can be used to isolate the first flexible sealing ring 211 from the high-temperature molten pool, thereby increasing the service life and working reliability of the first flexible sealing ring 211.

[0058] Exemplarily, the first flexible sealing ring 211 is made of rubber material.

[0059] In some embodiments, the first flexible sealing ring 211 is trumpet-shaped. Through the trumpet-shaped first flexible sealing ring 211, the deformation sealing effect of the first flexible sealing ring 211 can be improved.

[0060] In combination with Figure 1 and Figure 2As shown, in some embodiments, the axis of the sleeve member 21 is perpendicular to the top surface of the second welding object 200, and the welding port 2101 and the lens member 22 are respectively located at the axial two ends of the sleeve member 21.

[0061] Through the above arrangement, the sleeve member 21 only needs to be arranged as a cylindrical structure, which is simple in structure and reliable in performance. The laser beam 300 can be arranged along the axial direction of the sleeve member 21, and the industrial layout is simple and efficient.

[0062] In combination Figure 2 As shown, in some embodiments, the pressure head assembly 2 further comprises a mounting flange 24, which is located outside the lens member 22 and is fixedly connected with the sleeve member 21 coaxially. The mounting flange 24 is a hollow annular structure, which facilitates the passage of the laser beam 300.

[0063] In this embodiment, the lens member 22 is press-fitted on the axial end of the sleeve member 21 by the mounting flange 24, which is simple in structure, good in sealing performance, and has good maintenance convenience.

[0064] In some possible implementations, referring to Figure 2 、 4 As shown, the mounting flange 24 is fixedly connected on the axial end of the sleeve member 21 by a plurality of first mounting screws 26. The plurality of first mounting screws 26 are uniformly and spacedly arranged along the circumferential direction of the mounting flange 24.

[0065] In combination Figure 4 As shown, in some embodiments, the pressure head assembly 2 further comprises a second flexible sealing ring 25, which is located between at least two of the lens member 22, the sleeve member 21 and the mounting flange 24.

[0066] Through the above arrangement, the gap between at least two of the lens member 22, the sleeve member 21 and the mounting flange 24 is sealed by the second flexible sealing ring 25, which can ensure the sealing performance of the sleeve member 21 and the working stability of the welding device.

[0067] In some possible implementations, referring to Figure 4 As shown, the inner wall of the axial top end of the sleeve member 21 is provided with a stepped mounting portion 213, the lens member 22 is located on the stepped mounting portion 213, the bottom surface of the lens member 22 abuts against the top surface of the stepped mounting portion 213, and the outer peripheral surface of the lens member 22 abuts against the inner peripheral surface of the stepped mounting portion 213, so as to realize the installation and positioning of the lens member 22. Moreover, the top surface of the lens member 22 is flush with the top surface of the sleeve member 21.

[0068] The bottom surface of the mounting flange 24 abuts with the top surface of the lens piece 22 and the top surface of the sleeve piece 21 respectively, and the second flexible sealing ring 25 is located at the intersection position of the bottom surface of the mounting flange 24, the outer peripheral surface of the lens piece 22 and the inner peripheral surface of the stepped mounting portion 213, so that the flexible sealing ring 25 can simultaneously seal the joint gaps of the three surfaces.

[0069] Exemplarily, the bottom surface of the mounting flange 24 is provided with an annular mounting groove recessed upward, and at least part of the second flexible sealing ring 25 is contained in the annular mounting groove.

[0070] Another example, the cross-sectional shape of the second flexible sealing ring 25 includes, but is not limited to, O-shaped, Y-shaped, X-shaped, V-shaped and the like.

[0071] In combination Figure 5 As shown, in some embodiments, the welding device further comprises a lifting assembly 3, the pressure head assembly 2 is connected with the lifting assembly 3, and the lifting assembly 3 is used to drive the pressure head assembly 2 to rise or fall.

[0072] Through the above arrangement, the pressure head assembly 2 can be raised or lowered by the lifting assembly 3, so as to facilitate the loading and unloading of the first and second to-be-welded pieces 100 and 200 on the base piece 1.

[0073] In combination Figure 5 As shown, in some embodiments, the lifting assembly 3 comprises a lifting plate 31 and a lifting driving unit 32, the lifting plate 31 is located above the base piece 1, and the pressure head assembly 2 is connected with the lifting plate 31; the lifting plate 31 is connected with the lifting driving unit 32, and the lifting driving unit 32 is used to drive the lifting plate 31 to drive the pressure head assembly 2 to rise or fall.

[0074] Through the above arrangement, the lifting plate 31 can drive the pressure head assembly 2 to rise and fall stably under the driving of the lifting driving unit 32, and the lifting plate 31 can support multiple pressure head assemblies 2 at the same time, meeting the synchronous lifting demand of multiple pressure head assemblies 2 on multiple welding stations.

[0075] Exemplarily, the lifting driving unit 32 includes, but is not limited to, a hydraulic cylinder, an air cylinder, a linear motor, a worm gear device, a gear and rack device and the like.

[0076] In some possible implementations, the outer side of the sleeve piece 21 in the pressure head assembly 2 is provided with a flange fixing portion 212, and the pressure head assembly 2 can be connected with the lifting plate 31 by the flange fixing portion 212. Exemplarily, the flange fixing portion 212 is connected with the lifting plate 31 by multiple second mounting screws 27.

[0077] In some possible implementation manners, the lifting assembly 3 further comprises a device base 33, the device base 33 is located below the base piece 1, the lifting driving unit 32 is located on the device base 33, and the base piece 1 is installed and supported above the device base 33 through the support block 12.

[0078] In combination Figure 6 As shown in the drawings, in some embodiments, the first piece to be welded 100 is a battery cover plate, the second piece to be welded 200 is a adapter connecting piece, the battery cover plate is provided with a pole 1001, and the adapter connecting piece is welded with the pole 1001, and the adapter connecting piece is used to connect a pole piece.

[0079] Through the above arrangement, the welding device of the embodiment can complete laser welding of the battery cover plate and the adapter connecting piece, can reduce slag splashing and welding seam porosity, and can greatly improve the penetration, so that the required penetration can be achieved with lower laser power, greatly reducing the heat input generated during laser welding and reducing the welding cost.

[0080] In some possible implementation manners, the battery cover plate comprises an inner side surface 100a and an outer side surface 100b, wherein the inner side surface 100a faces the inner side of the battery, and the outer side surface 100b faces the outer side of the battery. The pole 1001 penetrates the inner side surface 100a and the outer side surface 100b, and the adapter connecting piece is welded at the end of the pole 1001 corresponding to the inner side surface 100a, so that the adapter connecting piece can electrically connect the pole lug of the roll core or the pole piece inside the battery with the pole 1001.

[0081] Exemplarily, the battery cover plate comprises a plastic support 1002 and a metal cover plate 1003, the plastic support 1002 is located on the inner side surface 100a, and the metal cover plate 1003 is located on the outer side surface 100b.

[0082] On the other hand, the embodiment provides a welding system, which comprises the welding device of the present application and a laser welding machine. The welding system of the embodiment adopts the welding device of the present application, and has all the beneficial technical effects of all the embodiments herein.

[0083] It should be noted that, in the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", and "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0084] In the present application, unless specifically stated and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0085] In the description of the present application, the description of the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example" or "some examples" means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the present application.

[0086] The above description is only some embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the principles of the present application shall be included in the protection scope of the present application.

Claims

1. A welding apparatus, characterized in that, The welding device includes: a base component (1) and a pressure head assembly (2); The base component (1) is used to support the stacked first weldable component (100) and second weldable component (200), and the second weldable component (200) is located above the first weldable component (100). The pressure head assembly (2) includes a sleeve (21), a lens (22), and a negative pressure pipeline (23); The sleeve (21) is located above the base (1), and the weld joint (2101) at the bottom end of the sleeve (21) is sealed and abuts against the top surface of the second part to be welded (200); The lens component (22) is embedded in the sleeve component (21), and the lens component (22) is used to transmit a laser beam (300) so that the laser beam (300) irradiates the second workpiece (200) to be welded in the welding joint (2101); The negative pressure pipeline (23) is connected to the sleeve (21), and the negative pressure pipeline (23) is used to evacuate the inside of the sleeve (21).

2. The welding apparatus according to claim 1, characterized in that, The sleeve (21) is provided with a first flexible sealing ring (211), which is located outside the weld joint (2101).

3. The welding apparatus according to claim 2, characterized in that, The first flexible sealing ring (211) is trumpet-shaped.

4. The welding apparatus according to claim 1, characterized in that, The axis of the sleeve (21) is perpendicular to the top surface of the second part to be welded (200), and the welding joint (2101) and the lens part (22) are located at the two ends of the axial direction of the sleeve (21).

5. The welding apparatus according to claim 4, characterized in that, The pressure head assembly (2) also includes a mounting flange (24), which is located on the outside of the lens element (22) and is coaxially fixedly connected to the sleeve element (21).

6. The welding apparatus according to claim 5, characterized in that, The pressure head assembly (2) further includes a second flexible sealing ring (25) located between at least two of the lens element (22), the sleeve element (21), and the mounting flange (24).

7. The welding apparatus according to any one of claims 1 to 6, characterized in that, The welding device also includes a lifting assembly (3), the pressure head assembly (2) is connected to the lifting assembly (3), and the lifting assembly (3) is used to drive the pressure head assembly (2) to rise or fall.

8. The welding apparatus according to claim 7, characterized in that, The lifting assembly (3) includes a lifting plate (31) and a lifting drive unit (32). The lifting plate (31) is located above the base component (1). The pressure head assembly (2) is connected to the lifting plate (31). The lifting plate (31) is connected to the lifting drive unit (32). The lifting drive unit (32) is used to drive the lifting plate (31). The lifting plate (31) drives the pressure head assembly (2) to rise or fall.

9. The welding apparatus according to claim 1, characterized in that, The first part to be welded (100) is a battery cover plate, and the second part to be welded (200) is an adapter connecting piece. The battery cover plate is provided with a terminal post (1001). The adapter connecting piece is welded to the terminal post (1001). The adapter connecting piece is used to connect the electrode sheet.

10. A welding system, characterized in that, The welding system includes: the welding apparatus according to any one of claims 1 to 9, and a laser welding machine.

Images