Welding positioning device and battery manufacturing equipment

Abstract

The utility model provides a welding positioning device and battery manufacturing equipment, the welding positioning device comprises a first pressing plate, second pressing plates and a positioning block, the second pressing plates are arranged on one side of the first pressing plate in the thickness direction, the tops of two pole column assemblies of a battery top cover abut against the second pressing plates, and the positioning block is arranged on the second pressing plates. The first pressing plate and the second pressing plate are matched to form a welding channel, the welding channel exposes the to-be-welded area of the pole assembly, the outer side of each pole assembly abuts against a positioning block, and the positioning blocks limit the pole assemblies. According to the welding positioning device, the second pressing plate and the positioning block are matched, so that the pole assembly in the battery top cover can be accurately positioned, the stability of the pole assembly in the welding process is ensured, displacement in the welding process is avoided, the welding quality is improved, and the welding efficiency is improved. And the problem that in the prior art, a top cover is prone to shaking in the welding process, and consequently the welding precision is affected can be solved.

Description

Technical Field

[0001] This utility model relates to the technical field of battery manufacturing, specifically to a welding positioning device and battery manufacturing equipment. Background Technology

[0002] In the field of battery manufacturing, especially in the production of power / energy storage batteries, the assembly and welding of the top cover is a crucial step in ensuring battery performance and safety. However, this process often involves several key steps, and the precision of each step directly affects the quality and performance of the final product.

[0003] In existing technologies, the top cover is prone to wobbling during the welding process due to unstable positioning between the top cover, the cover plate, and the terminal assembly. This wobbling directly leads to misalignment between the center positions of the terminal assembly and the cover plate, resulting in decreased welding precision and affecting the battery's sealing and conductivity. For example, if the welding point between the terminal assembly and the cover plate in the top cover deviates due to wobbling, it may cause weak welding or even a cold weld. This not only reduces the battery's conductivity but may also cause internal short circuits, posing a serious threat to the battery's lifespan and safety.

[0004] As can be seen from the above, the welding process of the top cover in the existing technology is prone to shaking, resulting in low welding accuracy. Utility Model Content

[0005] The main purpose of this utility model is to provide a welding positioning device and battery manufacturing equipment to solve the problem that the top cover in the prior art is prone to shaking during the welding process, which affects the welding accuracy.

[0006] To achieve the above objectives, according to one aspect of the present invention, a welding positioning device is provided for positioning a battery top cover. The welding positioning device includes a first pressure plate, a second pressure plate, and a positioning block. The second pressure plate is disposed on one side of the first pressure plate in the thickness direction. The tops of the two terminal post assemblies of the battery top cover abut against the second pressure plate. The first pressure plate and the second pressure plate cooperate to form a welding channel, which exposes the area to be welded of the terminal post assembly. A positioning block is abutted against the outer side of each terminal post assembly, and the positioning block limits the terminal post assembly.

[0007] Furthermore, there are two second pressure plates, which are spaced apart along the length of the first pressure plate. Each pole post assembly has a positioning block on both sides along the width of the first pressure plate, and the two positioning blocks cooperate to clamp and fix the pole post assembly.

[0008] Furthermore, the end of the positioning block facing the pole assembly has two abutting portions spaced apart along the length of the first pressure plate, forming a clearance between the two abutting portions, and the abutting portions abut against the pole assembly.

[0009] Furthermore, the inner wall of the clearance opening is curved.

[0010] Furthermore, the abutting part abuts against the outer peripheral surface of the pole assembly; or the bottom surface of the positioning block has a positioning surface, and the height of the positioning surface gradually increases along the direction toward the pole assembly to form a slope structure, and the slope structure abuts against the connection area between the outer peripheral surface and the top surface of the pole assembly.

[0011] Furthermore, the positioning block has a protrusion on the side away from the first pressure plate along the thickness direction of the first pressure plate. The protrusion is disposed on the end of the positioning block away from the terminal assembly. The battery top cover includes a cover plate and a terminal assembly disposed on the cover plate. Both sides of the cover plate abut against the protrusion along the width direction of the first pressure plate.

[0012] Furthermore, the opening area of ​​the welding channel gradually increases along the direction away from the pole assembly to form a flared structure.

[0013] Furthermore, the first pressure plate has a first through hole, and the second pressure plate has a second through hole, with the first through hole and the second through hole communicating to form a welding channel.

[0014] Furthermore, the welding positioning device also includes a connecting member capable of elastic deformation, wherein the first pressure plate and the second pressure plate are connected by the connecting member; and / or the area of ​​the end of the second pressure plate connected to the first pressure plate is greater than the area of ​​the end of the second pressure plate away from the first pressure plate.

[0015] According to another aspect of the present invention, a battery manufacturing apparatus is provided, which includes the welding positioning device described above.

[0016] The welding positioning device using the technical solution of this utility model includes a first pressure plate, a second pressure plate, and a positioning block. The second pressure plate is disposed on one side of the thickness direction of the first pressure plate. The tops of the two terminal post assemblies of the battery top cover abut against the second pressure plate. The first pressure plate and the second pressure plate cooperate to form a welding channel, which exposes the welding area of ​​the terminal post assembly. A positioning block is disposed on the outer side of each terminal post assembly, and the positioning block limits the terminal post assembly.

[0017] As can be seen from the above, the welding positioning device of this application adopts a structure in which the second pressure plate and the positioning block cooperate. During the welding process of the top cover, the positioning block and the second pressure plate can accurately position the terminal assembly in the battery top cover, ensuring the stability of the terminal assembly during the welding process, avoiding displacement during welding, and thus improving the welding quality.

[0018] This application employs a welding channel formed on the second pressure plate. This allows for welding operations on the area to be welded to be performed through the welding channel when the second pressure plate abuts against the pole assembly, achieving a non-interference effect between welding and positioning. The structural design of this application ensures the positioning effect of the pole assembly and also improves welding accuracy. At the same time, the welding channel allows the welding action to be performed inside the welding channel, which helps to avoid the phenomenon of weld spatter and also prevents the welding process from being easily affected by external factors, thus playing a protective role and further improving the welding quality. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the installation structure of the welding positioning device provided in this application;

[0021] Figure 2 Exploded view of the battery structure provided in this application;

[0022] Figure 3 A side view of the mounting structure of the welding positioning device provided in this application;

[0023] Figure 4 A three-dimensional structural diagram of the positioning block provided in this application;

[0024] Figure 5 A structural diagram showing the step difference between the top end face of the pole assembly and the top end face of the adapter pole provided in this application;

[0025] Figure 6 A top view of the battery provided in this application.

[0026] The above figures include the following reference numerals:

[0027] 110. First pressure plate; 101. Welding channel; 111. First through hole; 120. Second pressure plate; 121. Second through hole; 20. Positioning block; 210. Abutting end; 211. Positioning surface; 212. Abutting part; 213. Clearance opening; 220. Protrusion; 30. Battery top cover; 301. Area to be welded; 310. Cover plate; 320. Terminal assembly; 330. Adapter terminal. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0030] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0031] Example 1

[0032] To address the problem that the top cover in the prior art is prone to shaking during the welding process, which affects the welding accuracy, this application provides a welding positioning device for positioning the battery top cover.

[0033] The battery top cover 30 includes a cover plate 310 and two terminal post assemblies 320 disposed on the cover plate 310. One terminal post assembly 320 is a positive terminal post and the other terminal post assembly 320 is a negative terminal post. Both terminal post assemblies 320 have a terminal post plate structure to facilitate the installation of the terminal post assembly 320 into the terminal post mounting groove on the cover plate 310, thereby realizing the positioning and installation of the terminal post assembly 320.

[0034] In this embodiment, the pole post assembly 320 protrudes from the pole post mounting groove along the height direction of the first pressure plate 110.

[0035] like Figures 1 to 4 As shown, the welding positioning device includes a first pressure plate 110, a second pressure plate 120, and a positioning block 20. The second pressure plate 120 is disposed on one side of the first pressure plate 110 in the thickness direction. The tops of the two terminal post assemblies 320 of the battery top cover 30 abut against the second pressure plate 120. The first pressure plate 110 and the second pressure plate 120 cooperate to form a welding channel 101. The welding channel 101 exposes the welding area 301 of the terminal post assembly 320. The outer side of each terminal post assembly 320 is abutted against by a positioning block 20, which limits the terminal post assembly 320.

[0036] The positioning block 20 abuts against the outer part of the pole post assembly 320 that protrudes into the pole post mounting groove, thereby positioning the pole post assembly 320.

[0037] Specifically, such as Figure 5As shown, the welding positioning device of this application adopts a structure in which the second pressure plate 120 and the positioning block 20 cooperate. During the welding process of the top cover, it is necessary to ensure that the top end face of the electrode assembly 320 and the top end face of the adapter electrode 330 have a step difference in the height direction of the battery top cover 30 (i.e., Figure 5 To ensure consistent height difference (H) between the two components, the second pressure plate 120 presses the terminal assembly 320 in the height direction to ensure its positioning relative to the adapter terminal 330. The positioning block 20 limits the terminal assembly 320 in the width direction to ensure its center position relative to the adapter terminal 330. This prevents the poor center position of the terminal assembly 320 and the adapter terminal 330 from affecting the pressing effect of the second pressure plate 120 on the terminal assembly 320, which would result in poor consistency of the height difference between the terminal assembly 320 and the adapter terminal 330. The positioning block 20 and the second pressure plate 120 can accurately position the terminal assembly 320 in the battery top cover 30, ensuring its stability during welding, avoiding displacement during welding, and thus improving welding quality.

[0038] The height H of the step difference is 0-1mm, with H preferably being 0.3mm.

[0039] It should be noted that when detecting step differences, one can perform actions such as... Figure 6 The height of the step difference is detected in eight directions indicated by the arrows on the positive and negative terminals to monitor the step difference in real time, thereby helping to ensure the consistency of the step difference. Specifically, the height of the step difference can be detected using a sensor.

[0040] Furthermore, after the positioning block 20 abuts against the terminal assembly 320, it is fixed to the frame of the battery manufacturing equipment by fasteners, thereby fixing the positioning block 20 to ensure that the positioning block 20 remains in contact with the terminal assembly 320.

[0041] In this embodiment, two pole post assemblies 320 are provided, and two corresponding second pressure plates 120 are provided. The two second pressure plates 120 are spaced apart along the length direction of the first pressure plate 110. The second pressure plates 120 are provided one-to-one with the pole post assemblies 320. The second pressure plates 120 press against the peripheral edge of the top end of the pole post assembly 320 to install and fix the pole post assembly 320, thereby limiting the height of the pole post assembly 320. The abutting force applied by the second pressure plates 120 to the pole post assembly 320 helps to improve the stability of the pole post assembly 320 when installed on the cover plate.

[0042] Wherein, the length direction of the first pressure plate 110 is Figure 1 As shown in the X direction, the width direction of the first pressure plate 110 is... Figure 1As shown in the Y direction, the height direction of the first pressure plate 110 is... Figure 1 The Z direction is shown.

[0043] In this embodiment, the welding channel 101 exposes the area 301 to be welded, which is the area 301 between the pole post assembly 320 and the adapter pole post 330. Welding the pole post assembly 320 and the adapter pole post improves the connection strength between them. Specifically, the pole post assembly 320 has a hole structure, and the adapter pole post 330 passes through the hole structure. A weld is formed between the outer peripheral surface of the adapter pole post 330 and the inner wall surface of the hole structure, and the weld forms the area 301 to be welded.

[0044] This application employs a welding channel 101 formed on the second pressure plate 120. This allows for welding operations on the area 301 to be welded to be performed through the welding channel 101 when the second pressure plate 120 abuts against the pole assembly 320. This achieves the effect of welding and positioning without interference. The structural design of this application ensures the positioning effect of the pole assembly 320. At the same time, the welding channel 101 provides welding space for the welding head, which is beneficial to improving welding accuracy. The welding channel 101 allows the welding action to be performed inside the welding channel 101, which helps to avoid the phenomenon of weld spatter and also prevents the welding process from being easily affected by external factors, thus playing a protective role and further improving the welding quality.

[0045] like Figure 3 and Figure 4 As shown, each pole post assembly 320 is provided with a positioning block 20 on both sides along the width direction of the first pressure plate 110, and the two positioning blocks 20 cooperate to clamp and fix the pole post assembly 320.

[0046] Two positioning blocks 20 are arranged on both sides of the pole post assembly 320 along the width direction of the first pressure plate 110. The two positioning blocks 20 can clamp and fix the pole post assembly 320 to limit the pole post assembly 320 and prevent the pole post assembly 320 from shifting in the horizontal direction.

[0047] Specifically, in this application, the end of the positioning block 20 facing the pole post assembly 320 is an abutment end 210. The abutment end 210 has two abutment portions 212 spaced apart along the length of the first pressure plate 110, and a clearance opening 213 is formed between the two abutment portions 212. The abutment portions 212 abut against the pole post assembly 320. The positioning block 20 with two abutment portions 212 can be used to position pole post assemblies 320 of different shapes, which is beneficial to improving the range of applications. At the same time, the structure of the clearance opening 213 between the two abutment portions 212 can also reduce the space occupied and avoid affecting the pressing effect of the second pressure plate 120.

[0048] In this embodiment, the inner wall surface of the clearance opening 213 is arc-shaped. This application utilizes the arc-shaped clearance opening 213 to better adapt to the shape of the pole post assembly 320, ensuring the stability and positional accuracy of the assembly. Simultaneously, the arc-shaped design reduces friction between the positioning block 20 and the pole post assembly 320, preventing damage to the assembly during positioning. This contributes to enhanced stability and improved positional accuracy of the pole post assembly 320 during positioning, reduced component damage, and improved welding quality and efficiency.

[0049] In one specific embodiment of this example, the abutting part 212 abuts against the outer peripheral surface of the pole assembly 320.

[0050] Specifically, the abutting part 212 directly abuts against the outer peripheral surface of the pole post assembly 320 to abut against the pole post assembly 320 and complete the clamping, limiting and fixing of the pole post assembly 320.

[0051] In another specific embodiment of this example, the bottom surface of the positioning block 20 has a positioning surface 211, and the height of the positioning surface 211 gradually increases along the direction toward the pole post assembly 320 to form an inclined structure. The inclined structure abuts against the connection area between the outer peripheral surface and the top surface of the pole post assembly 320.

[0052] Among them, the connection area between the top surface and the outer peripheral surface of the pole assembly 320 forms a connection corner structure.

[0053] Specifically, the positioning surface 211 is set at one end of the positioning block 20 facing the pole post assembly 320. The positioning surface 211 extends upward at an angle along the direction towards the pole post assembly 320. The positioning surface 211 abuts against the connecting corner structure to achieve the upper limit positioning of the pole post assembly 320 in the height direction and horizontal direction of the first pressure plate 110.

[0054] In this embodiment, the structure of the second pressure plate 120 and the positioning block 20 can achieve upper positioning of the pole post assembly 320 along the height direction and horizontal plane direction of the first pressure plate 110, ensuring that the pole post assembly 320 can be stably set on the cover plate 310, avoiding the phenomenon of shaking and displacement, which is conducive to ensuring the welding quality of the pole post assembly 320 and improving the welding accuracy.

[0055] like Figure 3 and Figure 4 As shown, the positioning block 20 along the thickness direction of the first pressure plate 110 has a protrusion 220 on the side away from the first pressure plate 110. The protrusion 220 is disposed on the positioning block 20 at the end away from the terminal assembly 320. The battery top cover 30 includes a cover plate 310 and a terminal assembly 320 disposed on the cover plate 310. The protrusion 220 abuts against both sides of the cover plate 310 along the width direction of the first pressure plate 110.

[0056] Specifically, when the pole post assembly 320 is placed on the cover plate 310, the limiting block moves toward the pole post assembly 320 and abuts against the pole post assembly 320. Both sides of the cover plate 310 abut against the protrusion 220. This design can further limit the displacement of the pole post assembly 320 during the welding process and ensure the welding accuracy.

[0057] In this embodiment, the structure of the protrusion 220 enables the locking and limiting cover plate 310, the abutting part 212 on the positioning block 20 abuts against the limiting pole assembly 320, and the protrusion 220 on the positioning block 20 limits the cover plate 310, thereby the positioning block 20 has the effect of limiting the pole assembly 320, which is beneficial to ensuring the installation accuracy of the overall structure of the pole assembly 320.

[0058] like Figure 1 As shown, the area of ​​the end of the second pressure plate 120 connected to the first pressure plate 110 is greater than the area of ​​the end of the second pressure plate 120 away from the first pressure plate 110.

[0059] Specifically, the area of ​​the end of the second pressure plate 120 connected to the first pressure plate 110 is large, which helps to improve the connection strength between the second pressure plate 120 and the first pressure plate 110. The area of ​​the end of the second pressure plate 120 away from the first pressure plate 110 needs to be suitable for matching with the top of the pole post assembly 320, so as to abut against the top surface of the pole post assembly 320 to limit the pole post assembly 320. In actual applications, the area of ​​the pole post assembly 320 is small, so the area of ​​the end of the second pressure plate 120 away from the first pressure plate 110 is small. At the same time, the end of the second pressure plate 120 away from the first pressure plate 110 can avoid occupying space on the pole post assembly 320, thereby improving the welding accuracy.

[0060] In this embodiment, the first pressure plate 110 and the second pressure plate 120 are connected by a connector, which can buffer external forces through elastic deformation. The connector can be a spring or an elastic washer, etc. Specifically, the cooperation between the second pressure plate 120 and the connector allows it to float relative to the first pressure plate 110. Thus, when pressing the pole post assembly 320, the second pressure plate 120 can completely abut against the pole post assembly 320 through its floating setting, further improving the stability of the pole post assembly 320 during the welding process.

[0061] In this embodiment, the welding channel 101 formed by the first pressure plate 110 and the second pressure plate 120 gradually increases in opening area in the direction away from the pole post assembly 320, forming a flared structure. This flared structure better accommodates the welding head of the welding equipment, ensuring that the welding head can accurately enter the area to be welded 301, thus improving welding accessibility and precision. The flared structure facilitates welding operations, providing a wider working space for the welding equipment, thereby improving welding convenience and efficiency.

[0062] In this embodiment, the first pressure plate 110 has a first through hole 111, and the second pressure plate 120 has a second through hole 121. The first through hole 111 and the second through hole 121 are connected to form a welding channel 101. The center lines of the first through hole 111 and the second through hole 121 are collinear to avoid interference during welding between their inner wall surfaces. The welding channel 101 formed by the connection of the first through hole 111 and the second through hole 121 simplifies the structural design and ensures that the welding head can accurately enter the area to be welded 301 for welding. During the welding process, the accurate entry of the welding head and the accessibility of the area to be welded 301 ensure welding quality and efficiency, while reducing the risk of component displacement and avoiding battery performance problems caused by poor welding.

[0063] Example 2

[0064] This embodiment provides a battery manufacturing equipment, which includes the welding positioning device from Embodiment 1.

[0065] In this embodiment, the battery manufacturing equipment also includes a frame for supporting the welding positioning device.

[0066] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0067] The welding positioning device of this application adopts a structure in which the second pressure plate 120 and the positioning block 20 cooperate. During the welding process of the top cover, the positioning block 20 and the second pressure plate 120 can accurately position the terminal assembly 320 in the battery top cover 30, ensuring the stability of the terminal assembly 320 during the welding process, avoiding displacement during welding, thereby improving the welding quality.

[0068] This application employs a welding channel 101 formed on the second pressure plate 120. This allows for welding operations on the area 301 to be welded to be performed through the welding channel 101 when the second pressure plate 120 abuts against the pole assembly 320. This achieves the effect of welding and positioning without interference. The structural design of this application ensures the positioning effect of the pole assembly 320 and also improves the welding accuracy. At the same time, the welding channel 101 allows the welding action to be performed inside the welding channel 101, which helps to avoid the phenomenon of weld spatter and also prevents the welding process from being easily affected by external factors, thus playing a protective role and further improving the welding quality.

[0069] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0070] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0071] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0072] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A welding positioning device, characterized in that, For positioning the battery top cover (30), the welding positioning device includes: First pressure plate (110); The second pressure plate (120) is disposed on one side of the thickness direction of the first pressure plate (110). The tops of the two pole post assemblies (320) of the battery top cover (30) are abutted by the second pressure plate (120). The first pressure plate (110) and the second pressure plate (120) cooperate to form a welding channel (101). The welding channel (101) exposes the welding area (301) of the pole post assembly (320). The positioning block (20) is provided on the outer side of each of the pole post assemblies (320), and the positioning block (20) limits the pole post assembly (320).

2. The welding positioning device according to claim 1, characterized in that, There are two second pressure plates (120), and the two second pressure plates (120) are spaced apart along the length direction of the first pressure plate (110); Each of the pole post assemblies (320) is provided with positioning blocks (20) on both sides along the width direction of the first pressure plate (110), and the two positioning blocks (20) cooperate to clamp and fix the pole post assembly (320).

3. The welding positioning device according to claim 1, characterized in that, The positioning block (20) has two abutting portions (212) spaced apart along the length of the first pressure plate (110) at one end facing the pole assembly (320), and a clearance opening (213) is formed between the two abutting portions (212), and the abutting portions (212) abut against the pole assembly (320).

4. The welding positioning device according to claim 3, characterized in that, The inner wall surface of the clearance opening (213) is an arc-shaped surface.

5. The welding positioning device according to claim 3, characterized in that, The abutting portion (212) abuts against the outer peripheral surface of the pole assembly (320); or The bottom surface of the positioning block (20) has a positioning surface (211), and the height of the positioning surface (211) gradually increases along the direction toward the pole post assembly (320) to form a slope structure. The slope structure abuts against the connection area between the outer peripheral surface and the top surface of the pole post assembly (320).

6. The welding positioning device according to claim 1, characterized in that, Along the thickness direction of the first pressure plate (110), the positioning block (20) has a protrusion (220) on the side opposite to the first pressure plate (110). The protrusion (220) is disposed on the positioning block (20) at one end away from the terminal assembly (320). The battery top cover (30) includes a cover plate (310) and the terminal assembly (320) disposed on the cover plate (310). The protrusion (220) abuts on both sides of the cover plate (310) along the width direction of the first pressure plate (110).

7. The welding positioning device according to claim 1, characterized in that, The welding channel (101) gradually increases in opening area in the direction away from the pole assembly (320) to form a flared structure.

8. The welding positioning device according to claim 1, characterized in that, The first pressure plate (110) has a first through hole (111), and the second pressure plate (120) has a second through hole (121). The first through hole (111) and the second through hole (121) are connected to form the welding channel (101).

9. The welding positioning device according to any one of claims 1 to 8, characterized in that, The welding positioning device further includes a connecting member capable of elastic deformation, wherein the first pressure plate (110) and the second pressure plate (120) are connected via the connecting member; and / or The area of ​​the end of the second pressure plate (120) connected to the first pressure plate (110) is greater than the area of ​​the end of the second pressure plate (120) away from the first pressure plate (110).

10. A battery manufacturing apparatus, characterized in that, The welding positioning device includes any one of claims 1 to 9.

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