Tab welding device

Abstract

The utility model belongs to the technical field of battery manufacturing, and discloses a tab welding device which comprises a welding mechanism, a feeding mechanism and a pressing mechanism. The feeding mechanism comprises a first driving assembly, a carrying table and a positioning assembly, the carrying table is arranged on the first driving assembly, the positioning assembly can position the battery cell body and the top cover, and the first driving assembly is used for driving the battery cell body to move to the welding position of the welding mechanism. And the pressing mechanism is arranged on the first driving assembly and can clamp a tab and a top cover switching piece on the battery cell body. According to the tab welding device, the tab and the top cover adapter plate can be reliably positioned, and the assembling efficiency and the welding efficiency of the tab and the top cover adapter plate are improved.

Description

Technical Field

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

[0002] In battery production, welding the cell tabs to the top cover is a crucial step in battery assembly. Currently, ultrasonic welding of the cell tabs is mainly used. This involves stacking the cell tabs and the adapter plates of the top cover terminals together, pressing them down with a pressure head. Under pressure, the friction between the cell tabs and the adapter plates causes molecular-layer fusion. However, for some cells with shorter tabs, ultrasonic welding is not feasible. In such cases, laser welding is necessary after pressing the tabs and adapter plates together with a clamping block.

[0003] Existing welding equipment lacks reliability in assembling and clamping the battery cell tabs and top cover adapter pieces, and is inconvenient to operate, which affects the welding efficiency and assembly efficiency of the battery cell tabs and top cover.

[0004] Therefore, there is an urgent need for a tab welding device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a tab welding device that can reliably position the tab and the top cover adapter, thereby improving the assembly and welding efficiency of the tab and the top cover adapter.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Electrode welding apparatus, comprising:

[0008] Welding mechanism;

[0009] The feeding mechanism includes a first driving component, a platform, and a positioning component. The platform is disposed on the first driving component, and the positioning component is capable of positioning the battery cell body and the top cover. The first driving component is used to drive the battery cell body to move to the welding position of the welding mechanism.

[0010] A clamping mechanism, disposed on the first drive assembly, is capable of clamping the tabs and top cover adapter plates on the battery cell body.

[0011] As a preferred embodiment of the electrode welding device provided by this utility model, the positioning component includes a plurality of first limiting members, the plurality of first limiting members are disposed on the platform, the plurality of first limiting members enclose an accommodating space, and the battery cell body is limited within the accommodating space;

[0012] A third limiting member is located on one side of one of the first limiting members, and the top cover is positioned between the third limiting member and the corresponding first limiting member.

[0013] As a preferred embodiment of the electrode welding device provided by this utility model, the first driving component includes a guide rail and a mounting plate, the mounting plate being movably disposed on the guide rail, and the clamping mechanism and the platform being disposed on the mounting plate respectively.

[0014] As a preferred embodiment of the electrode welding device provided by this utility model, the clamping mechanism includes a support base, a first pressure head and a second pressure head. The first pressure head and the second pressure head are adjustablely arranged on the support base in the Z direction. The first pressure head and the second pressure head can clamp and position the electrode and the top cover adapter piece in the Z direction.

[0015] As a preferred embodiment of the electrode welding device provided by this utility model, the clamping mechanism further includes a second driving component and a transmission component. The second driving component is disposed on the bearing seat and connected to the second pressure head, and can adjust the height of the second pressure head in the Z direction.

[0016] The first pressure head and the second pressure head are connected by the transmission assembly, which drives the first pressure head to move in the opposite direction to the movement direction of the second pressure head.

[0017] As a preferred embodiment of the electrode welding device provided by this utility model, the transmission assembly includes a first connecting rod, a second connecting rod, and a rotating shaft. The first connecting rod and the second connecting rod are arranged crosswise, and the crosswise position is rotatably connected to the bearing seat through the rotating shaft. The two ends of the first connecting rod are respectively connected to the first pressure head and the second pressure head, and the two ends of the second connecting rod are respectively connected to the first pressure head and the second pressure head.

[0018] As a preferred embodiment of the electrode welding device provided by this utility model, the clamping mechanism further includes a slide rod, which is arranged along the Z direction and installed on the bearing seat. The first pressure head and the second pressure head are slidably connected to the slide rod.

[0019] As a preferred embodiment of the electrode welding device provided by this utility model, the platform is provided with a clearance hole, and the second pressure head can extend from the side of the platform away from the electrode through the clearance hole and abut against the electrode.

[0020] As a preferred embodiment of the electrode welding device provided by this utility model, the welding mechanism includes a welding head and a lifting assembly. The welding head is height-adjustable on the lifting assembly in the Z direction, and the welding head faces the electrode and the top cover adapter piece.

[0021] As a preferred embodiment of the electrode welding device provided by this utility model, the electrode welding device further includes a worktable, on which the first driving component and the welding mechanism are respectively disposed.

[0022] The beneficial effects of this utility model are:

[0023] The electrode welding device provided by this utility model includes a feeding mechanism, a clamping mechanism, and a welding mechanism. The feeding mechanism includes a first driving component, a platform, and a positioning component. The platform is mounted on the first driving component, and the positioning component positions the battery cell body and the top cover. The first driving component drives the battery cell body to the welding position of the welding mechanism. The clamping mechanism is mounted on the first driving component and clamps the electrode and top cover adapter piece on the battery cell body. The positioning component and the clamping mechanism ensure the stability and reliability of the positioning between the electrode and the top cover adapter piece, thereby improving the assembly efficiency of the electrode and the top cover adapter piece. The welding mechanism can weld the electrode and the top cover adapter piece. The first driving component can adjust the relative position between the platform and the welding mechanism, and also adjust the relative position between the clamping mechanism and the welding mechanism. Through the first driving component, the electrode and the top cover adapter piece to be welded can be moved simultaneously and accurately to the welding mechanism, facilitating subsequent welding of the electrode and the top cover adapter piece by the welding mechanism and improving welding efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the electrode welding device provided in an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A magnified view of a section marked A in the middle;

[0027] Figure 3 This is a schematic diagram of the structure of the platform and positioning assembly provided in this embodiment of the utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the first driving component and the pressing mechanism provided in this embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the pressing mechanism provided in an embodiment of the present invention.

[0030] In the picture:

[0031] 10. Battery cell body; 20. Terminal post; 30. Tab;

[0032] 100. Feeding mechanism; 110. First drive assembly; 111. Guide rail; 112. Mounting plate; 120. Platform; 121. Clearance hole; 122. Clearance notch; 130. First limiting component; 150. Third limiting component; 151. Clamping groove;

[0033] 200. Clamping mechanism; 210. Bearing seat; 211. First clearance hole; 212. Second clearance hole; 213. Vertical bearing part; 214. Horizontal connecting part; 220. First pressure head; 221. Through port; 230. Second pressure head; 240. Second drive assembly; 250. Transmission assembly; 251. First connecting rod; 252. Second connecting rod; 253. Rotating shaft; 260. Slide rod;

[0034] 300. Welding mechanism; 310. Welding head; 311. Support; 320. Lifting assembly; 321. Housing; 322. Opening;

[0035] 400. Workbench. Detailed Implementation

[0036] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connect," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] Figure 1A schematic diagram of the electrode welding device provided in an embodiment of this utility model is shown. (Refer to...) Figure 1 This embodiment provides a tab welding device. The tab welding device includes a feeding mechanism 100, a clamping mechanism 200, a welding mechanism 300, and a worktable 400. The tab welding device can position the battery cell, and position the battery cell body 10, tab 30, top cover, and top cover adapter piece of the battery cell, and realize the welding of the tab 30 and the top cover adapter piece.

[0046] In this embodiment, the tab 30 is disposed on the cell body 10. A top cover is vertically disposed on one side of the tab 30, and a terminal post 20 is disposed through the top cover. The top cover adapter includes a vertical portion and a horizontal portion. The vertical portion is connected to the terminal post 20, and the horizontal portion is stacked together with the tab 30. This arrangement facilitates the connection and assembly of the cell's top cover onto the cell body 10, thereby improving subsequent welding efficiency.

[0047] The feeding mechanism 100 includes a first drive assembly 110, a platform 120, and a positioning assembly. The platform 120 is mounted on the first drive assembly 110, and the positioning assembly can clamp the tab 30 and the top cover on the battery cell body 10. A clamping mechanism 200 is mounted on the first drive assembly 110 and can clamp and position the tab 30 and the top cover adapter piece. Through the positioning assembly and the clamping mechanism 200, the stability and reliability of the positioning between the tab 30 and the top cover adapter piece can be ensured, thereby improving the assembly efficiency of the tab 30 and the top cover adapter piece.

[0048] The welding mechanism 300 is used to weld the tab 30 and the top cover adapter piece. The first drive assembly 110 can adjust the relative position between the platform 120 and the welding mechanism 300, and also adjust the relative position between the clamping mechanism 200 and the welding mechanism 300. Through the first drive assembly 110, the tab 30 and the top cover adapter piece to be welded can be moved simultaneously and accurately to the welding mechanism 300, so as to facilitate the subsequent welding of the tab 30 and the top cover adapter piece by the welding mechanism 300 and improve the welding efficiency.

[0049] The feeding mechanism 100, the clamping mechanism 200, and the welding mechanism 300 are all mounted on the worktable 400, thereby improving the integration of the electrode welding device.

[0050] Figure 2 Show Figure 1 A magnified view of a section marked A in the middle; Figure 3 A schematic diagram of the platform and positioning assembly provided in an embodiment of this utility model is shown. (Refer to...) Figures 1-3The positioning component includes multiple first limiting members 130, which are disposed on the platform 120 and enclose an accommodating space, within which the battery cell body 10 is positioned. In this embodiment, there are at least four first limiting members 130, which are respectively disposed on the bearing surface of the platform 120. After the battery cell body 10 is placed on the bearing surface, the four first limiting members 130 are respectively disposed at both ends of the battery cell body 10 along the X and Y directions.

[0051] In this embodiment, the first limiting member 130 has an L-shaped structure, including an integrally formed first horizontal portion and a first vertical portion. The first vertical portion abuts against the side of the battery cell body 10, and the first horizontal portion is finely connected to the platform 120. In this embodiment, a first oblong hole is provided on the first horizontal portion. By passing a first bolt through and connecting it to a first preset hole on the platform 120, the first limiting member 130 can be fixed on the platform 120. The first bolt can be adjusted and fixed along the long axis of the first oblong hole.

[0052] To be more specific, continue to refer to Figure 3 The positioning component includes a third limiting member 150. The third limiting member 150 is disposed on one side of one of the first limiting members 130, specifically on the side of the first limiting member 130 closest to the tab 30. During assembly, the top cover is placed vertically and positioned between the third limiting member 150 and the corresponding first limiting member 130, with the top cover adapter plate on the top cover facing the cell body 10, so that the top cover adapter plate and the tab 30 connected to the cell body 10 are stacked.

[0053] The third limiting member 150 is provided with a clamping groove 151, in which the electrode post 20 can be embedded. In this embodiment, there are two third limiting members 150, which can respectively fix the two electrode posts 20 on the battery cell body 10. The third limiting member 150 is specifically L-shaped, including an integrally formed third horizontal part and a third vertical part. The clamping groove 151 is formed in the third vertical part, and the third horizontal part is finely connected to the platform 120 in the X direction. In this embodiment, a third oblong hole is formed on the third horizontal part. By passing a third bolt through and connecting it to the third oblong hole and the second preset hole on the platform 120, the third limiting member 150 can be fixed on the platform 120. The third bolt can be adjusted along the long axis of the third oblong hole. It should be noted that the long axis of the third waist-shaped hole is set parallel to the X direction, so that the position of the two third limiting members 150 can be finely adjusted according to the distance between the two pole posts 20.

[0054] It should be noted that in this embodiment, the X direction is perpendicular to the Y direction, the X direction is the width direction of the cell body 10, and the Y direction is the length direction of the cell body 10.

[0055] Continue to refer to Figure 1 and Figure 3 The platform 120 has a clearance notch 122 on its side. This clearance notch 122 facilitates the removal of the battery cell body 10, which helps to achieve automated feeding and thus improves assembly and welding efficiency.

[0056] Continue to refer to Figure 1 The first driving assembly 110 includes a guide rail 111 and a mounting plate 112. The guide rail 111 is disposed on the worktable 400, and the mounting plate 112 is movably connected to the guide rail 111 via a slider or the like. The clamping mechanism 200 and the platform 120 are respectively disposed on the mounting plate 112. In this embodiment, the guide rail 111 is arranged parallel to the X direction, and there are two guide rails 111, which are parallel to each other and spaced apart in the Y direction. The slider of the mounting plate 112 can be driven by a motor or other driving components, and the specific type and structure of the driving components are not limited in this embodiment.

[0057] Figure 4 This diagram shows a structural schematic of the first driving component and the clamping mechanism provided in an embodiment of the present invention. Figure 5 A schematic diagram of the clamping mechanism provided in an embodiment of this utility model is shown. (Refer to...) Figure 1 , Figure 2 , Figure 4 and Figure 5 The clamping mechanism 200 provided in this embodiment includes a support base 210, a first pressure head 220, and a second pressure head 230. The support base 210 has an L-shaped structure and includes an integrally formed vertical support portion 213 and a horizontal connecting portion 214. The horizontal connecting portion 214 is fixedly disposed on the mounting plate 112, and the vertical support portion 213 is disposed parallel to the Z-direction. The first pressure head 220 and the second pressure head 230 are disposed on the vertical support portion 213 of the support base 210 with adjustable spacing in the Z-direction. The first pressure head 220 and the second pressure head 230 can clamp and position the electrode tab 30 and the top cover adapter piece in the Z-direction. In this embodiment, the example of the first pressure head 220 being located above the second pressure head 230 is described.

[0058] Specifically, the pressing mechanism 200 further includes a second drive assembly 240 and a transmission assembly 250. The drive end of the second drive assembly 240 is fixedly mounted on the vertical support portion 213, and its output end is connected to the bottom of the second pressure head 230, enabling adjustment of the height of the second pressure head 230 in the Z direction. The first pressure head 220 and the second pressure head 230 are connected via the transmission assembly 250, which can drive the first pressure head 220 to move in the opposite direction to the movement direction of the second pressure head 230. In this embodiment, the second drive assembly 240 can specifically be a servo motor.

[0059] When the second pressure head 230 moves upward under the drive of the second drive assembly 240, the first pressure head 220 can move downward under the movement of the second pressure head 230 and the transmission action of the transmission assembly 250, thereby clamping the tab 30. When the second pressure head 230 moves downward under the drive of the second drive assembly 240, the first pressure head 220 can move upward under the movement of the second pressure head 230 and the transmission action of the transmission assembly 250, thereby releasing the tab 30.

[0060] Optionally, the clamping mechanism 200 further includes a slide bar 260, which is arranged along the Z-direction and mounted on the support base 210. The first pressure head 220 and the second pressure head 230 are slidably connected to the slide bar 260. In this embodiment, there are two slide bars 260, which are parallel to each other and spaced apart in the X-direction. Both slide bars 260 pass through the first pressure head 220 and the second pressure head 230 simultaneously. Through the slide bars 260, the first pressure head 220 and the second pressure head 230 can be limited, so that the first pressure head 220 and the second pressure head 230 can only move along the Z-direction.

[0061] Specifically, refer to Figure 5The transmission assembly 250 and the first pressure head 220 are located on opposite sides of the vertical support portion 213. The transmission assembly 250 includes a first connecting rod 251, a second connecting rod 252, and a rotating shaft 253. The first connecting rod 251 and the second connecting rod 252 are arranged intersectingly, and the points where the first connecting rod 251 and the second connecting rod 252 intersect are rotatably connected to the vertical support portion 213 via the same rotating shaft 253. The vertical support portion 213 has a first clearance hole 211 and a second clearance hole 212. Both the first clearance hole 211 and the second clearance hole 212 are elongated slots, both parallel to the Z direction, and spaced apart in the X direction. The top end of the first connecting rod 251 passes through the first clearance hole 211 and connects to the first end of the first pressure head 220 in the X direction. The bottom end of the first connecting rod 251 passes through the second clearance hole 212 and connects to the second end of the second pressure head 230 in the X direction. The top end of the second connecting rod 252 passes through the second clearance hole 212 and connects to the second end of the first pressure head 220 in the X direction. The bottom end of the second connecting rod 252 passes through the first clearance hole 211 and connects to the first end of the second pressure head 230 in the X direction. It should be noted that the first end of the first pressure head 220 and the first end of the second pressure head 230 in the X direction correspond to each other in the Z direction; the second end of the first pressure head 220 and the second end of the second pressure head 230 in the X direction correspond to each other in the Z direction.

[0062] Preferably, the first pressure head 220 is provided with weight-reducing holes. This design reduces the weight of the first pressure head 220, preventing deformation of the first connecting rod 251 and the second connecting rod 252 due to the excessive weight of the first pressure head 220 after prolonged use.

[0063] Continue to refer to Figure 2 and Figure 3 The platform 120 is provided with a clearance hole 121. The second pressure head 230 can extend from the side of the platform 120 away from the electrode tab 30 through the clearance hole 121 and abut against the electrode tab 30.

[0064] Continue to refer to Figure 1 The welding mechanism 300 includes a welding head 310 and a lifting assembly 320. The welding head 310 is height-adjustable on the lifting assembly 320 in the Z direction, and the welding head 310 faces the tab 30 and the top cover adapter piece to achieve welding of the tab 30 and the top cover adapter piece.

[0065] Specifically, the lifting assembly 320 includes a housing 321, a drive motor, and a lead screw assembly. The motor and lead screw assembly are housed within the housing 321, with the lead screw assembly connected to the output end of the drive motor and positioned within the housing 321 along the Z-direction. The bracket 311 of the welding head 310 extends into the housing 321 through an opening 322 and is connected to the output end of the lead screw assembly. The opening 322 is elongated, with its length parallel to the Z-direction, and can limit and guide the movement of the bracket 311. The bracket 311 can be adjusted in height in the Z-direction by the drive motor, the lead screw assembly, and the limiting and guiding action of the opening 322, allowing it to descend and enabling the welding head 310 to weld the tab 30 and the top cover adapter plate.

[0066] It should be noted that the first pressure head 220 has a through-hole 221, which can avoid the welding head 310, and the welding head 310 can pass through the through-hole 221 to weld the tab 30 and the top cover adapter piece.

[0067] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A tab welding apparatus characterized by, include: Welding mechanism (300); The feeding mechanism (100) includes a first driving component (110), a platform (120) and a positioning component. The platform (120) is disposed on the first driving component (110). The positioning component is capable of positioning the battery cell body (10) and the top cover. The first driving component (110) is used to drive the battery cell body (10) to move to the welding position of the welding mechanism (300). A clamping mechanism (200) is disposed on the first drive assembly (110) and is capable of clamping the tabs (30) and the top cover adapter on the battery cell body (10).

2. The electrode tab welding device according to claim 1, characterized in that, The positioning component includes: Multiple first limiting members (130) are disposed on the platform (120), and the multiple first limiting members (130) enclose an accommodating space, and the battery cell body (10) is limited within the accommodating space; A third limiting member (150) is located on one side of one of the first limiting members (130), and the top cover is located between the third limiting member (150) and the corresponding first limiting member (130).

3. The electrode welding device according to claim 1, characterized in that, The first drive assembly (110) includes a guide rail (111) and a mounting plate (112), the mounting plate (112) being movably disposed on the guide rail (111), and the clamping mechanism (200) and the platform (120) being disposed on the mounting plate (112).

4. The electrode welding device according to claim 1, characterized in that, The clamping mechanism (200) includes a support base (210), a first pressure head (220), and a second pressure head (230). The first pressure head (220) and the second pressure head (230) are arranged on the support base (210) with an adjustable distance in the Z direction. The first pressure head (220) and the second pressure head (230) can clamp and position the electrode tab (30) and the top cover adapter piece in the Z direction.

5. The electrode welding apparatus according to claim 4, characterized in that, The pressing mechanism (200) further includes a second drive assembly (240) and a transmission assembly (250). The second drive assembly (240) is disposed on the support base (210) and connected to the second pressure head (230), and can adjust the height of the second pressure head (230) in the Z direction. The first pressure head (220) and the second pressure head (230) are connected by the transmission assembly (250), and the transmission assembly (250) drives the first pressure head (220) to move in the opposite direction to the movement direction of the second pressure head (230).

6. The electrode welding apparatus according to claim 5, characterized in that, The transmission assembly (250) includes a first connecting rod (251), a second connecting rod (252), and a rotating shaft (253). The first connecting rod (251) and the second connecting rod (252) are arranged crosswise, and the crosswise position is rotatably connected to the bearing seat (210) through the rotating shaft (253). The two ends of the first connecting rod (251) are respectively connected to the first pressure head (220) and the second pressure head (230), and the two ends of the second connecting rod (252) are respectively connected to the first pressure head (220) and the second pressure head (230).

7. The electrode welding apparatus according to claim 4, characterized in that, The pressing mechanism (200) further includes a slide rod (260), which is arranged along the Z direction and mounted on the support (210). The first pressure head (220) and the second pressure head (230) are slidably connected to the slide rod (260).

8. The tab welding apparatus of claim 4, wherein The platform (120) is provided with a relief hole (121), and the second pressure head (230) can extend from the side of the platform (120) away from the electrode (30) through the relief hole (121) and abut against the electrode (30).

9. The electrode welding apparatus according to claim 1, characterized in that, The welding mechanism (300) includes a welding head (310) and a lifting assembly (320). The welding head (310) is height-adjustable on the lifting assembly (320) in the Z direction, and the welding head (310) faces the electrode tab (30) and the top cover adapter piece.

10. The electrode tab welding apparatus according to any one of claims 1-9, characterized in that, The electrode welding device further includes a worktable (400), on which the first drive assembly (110) and the welding mechanism (300) are respectively disposed.

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