Welding positioning mechanism and welding equipment

Abstract

The utility model relates to the technical field of battery manufacturing, and discloses a welding positioning mechanism which comprises a driving module and a positioning module in driving connection with the driving module. The driving module comprises a first driving unit for driving the positioning module to press down and a second driving unit for driving the positioning module to rotate; the positioning module comprises a positioning unit, a first floating unit and a second floating unit, the first floating unit and the second floating unit are arranged on the positioning unit, the first floating unit is used for providing a floating space for rotating movement of the positioning unit, and the second floating unit is used for providing a floating space for pressing movement of the positioning unit. The utility model has the following technical effects: the arrangement of the first floating unit avoids the scratch of the top cover caused by the relative friction between the positioning unit and the battery top cover in the rotating process; and the second floating unit is arranged to prevent the positioning unit from generating indentations on the top cover due to overlarge force in the downward pressing process, so that the quality and the aesthetic property of the product are improved. The utility model further discloses welding equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery manufacturing, and particularly relates to a welding positioning mechanism and welding equipment. Background Art

[0002] At present, with the continuous popularization and development of electric vehicles, the market demand for lithium-ion batteries is also increasing. In order to meet the growing market demand, while increasing the output of lithium batteries, it is also necessary to improve the quality of lithium battery production at the same time. In the production process of lithium batteries, in order to improve production efficiency, automated side welding is usually used to achieve full welding between the battery top cover and the aluminum shell of the battery body. The specific welding process is as follows: the support mechanism supports and fixes the battery body, and the upper positioning mechanism presses down the battery top cover to fix the battery top cover on the aluminum shell of the battery body. During welding, the support mechanism and the upper positioning mechanism rotate simultaneously, so that the welding mechanism performs welding operations around the battery, and finally completes the full weld.

[0003] Two problems are prone to occur when full welding between the battery top cover and the battery aluminum shell using this welding method. First, since the support mechanism and the upper positioning mechanism are driven to rotate by different rotation drive components, there is relative movement between the two during the rotation process, which will cause friction between the upper positioning mechanism and the battery top cover, resulting in scratches on the battery top cover, affecting both the quality and the appearance; second, the upper positioning mechanism is prone to excessive downward pressure during the downward pressure process, resulting in indentations on the battery top cover, affecting the quality and appearance of the product.

[0004] The existing upper positioning mechanism adopts a method of setting a buffer component on the pressing block to buffer the downward pressure of the pressing block, thereby reducing the impact of the upper positioning mechanism on the battery top cover during the downward pressure process. However, the problem of the upper positioning mechanism affecting the battery top cover during the rotation process has not been solved. Utility Model Content

[0005] To address the shortcomings of the prior art, the present invention provides a welding positioning mechanism. By providing a first floating unit, this mechanism prevents scratches on the battery cover caused by relative friction between the positioning unit and the battery cover during rotation. By providing a second floating unit, this mechanism prevents indentations on the battery cover caused by excessive downward pressure from the positioning unit, thereby improving the quality and aesthetics of the battery product. The present invention also provides welding equipment.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical aspects:

[0007] In a first aspect, the utility model provides a welding positioning mechanism, comprising a driving module and a positioning module drivingly connected to the driving module;

[0008] The driving module includes a first driving unit for driving the positioning module to press down and a second driving unit for driving the positioning module to rotate;

[0009] The positioning module includes a positioning unit and a first floating unit and a second floating unit provided on the positioning unit. The first floating unit is used to provide a floating space for the rotational movement of the positioning unit, and the second floating unit is used to provide a floating space for the downward movement of the positioning unit.

[0010] As a further description of the technical solution of the present invention, the first floating unit includes a first floating component that can float along the X direction and a second floating component that can float along the Y direction. The first floating component is connected to the second floating component, and the second floating component is connected to the positioning unit.

[0011] As a further description of the technical solution of the present utility model, the first floating assembly includes a first mounting bracket, a first slide rail and a first spring, and the second floating assembly includes a second mounting bracket, a second slide rail and a second spring;

[0012] The first slide rail is arranged on the first mounting bracket along the X direction, the second mounting bracket is slidably connected to the first slide rail, and opposite ends of the second mounting bracket in the X direction are respectively connected to the first mounting bracket via first springs, and the springing direction of the first spring is the same as the sliding direction of the second mounting bracket;

[0013] The second slide rail is arranged on the second mounting bracket along the Y direction, the positioning unit is slidably connected to the second slide rail, and the opposite ends of the positioning unit in the Y direction are respectively connected to the second mounting bracket through second springs, and the elastic direction of the second spring is the same as the sliding direction of the positioning unit.

[0014] As a further description of the technical solution of the present invention, the positioning unit includes a first pressure block and a second pressure block, the first pressure block forms a accommodating cavity with an opening facing downward, the second pressure block is connected to the top wall of the accommodating cavity through a second floating unit, and the height of the lower surface of the first pressure block is higher than the height of the lower surface of the second pressure block.

[0015] As a further description of the technical solution of the present invention, the second floating unit includes a plurality of third springs arranged along the Z direction, and two ends of the third springs are respectively connected to the second pressure block and the top wall of the accommodating cavity.

[0016] As a further description of the technical solution of the present invention, the positioning unit also includes a third pressure block, which is located on the outer periphery of the second pressure block and connected to the side wall of the accommodating cavity. The height of the lower surface of the third pressure block is between the height of the lower surface of the first pressure block and the height of the lower surface of the second pressure block.

[0017] As a further description of the technical solution of the present invention, the first pressing block is made of high-temperature resistant metal material, and the second pressing block and the third pressing block are both made of elastic material.

[0018] As a further description of the technical solution of the present invention, the height difference between the first pressing block and the third pressing block is smaller than the height difference between the second pressing block and the third pressing block.

[0019] In a second aspect, the utility model provides a welding device, comprising a supporting mechanism, a welding mechanism and the above-mentioned welding positioning mechanism, wherein the welding positioning mechanism is located above the supporting mechanism, and the welding mechanism is located to the side of the supporting mechanism.

[0020] As a further description of the technical solution of the present invention, the support mechanism includes a support platform and a drive motor for driving the support platform to rotate.

[0021] In summary, the present invention has at least the following advantages:

[0022] 1. The welding positioning mechanism provided by the present invention can effectively improve the problem of scratches on the battery top cover caused by the relative friction between the positioning unit and the battery top cover during rotation by arranging a first floating unit on the positioning unit, thereby improving the production quality and aesthetics of the battery; and effectively improve the problem of indentations on the battery top cover caused by excessive force during the downward pressing of the positioning unit by arranging a second floating unit on the positioning unit, thereby further improving the quality and aesthetics of the battery product.

[0023] 2. The welding equipment provided by the present invention, with the cooperation of the welding positioning mechanism and the supporting mechanism, realizes the fixation of the battery body and the battery top cover. Through the synchronous rotation of the welding positioning mechanism and the supporting mechanism, the welding mechanism completes the full welding operation between the aluminum shell on the battery body and the battery top cover. The setting of the welding positioning mechanism effectively prevents the battery top cover from being scratched and indented during the welding process, thereby improving the quality of the welding operation. At the same time, the quality and aesthetics of the product are also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural diagram of the welding positioning mechanism of Example 1 of the present utility model;

[0025] Figure 2This is a front view of the positioning module of Example 1 of the present utility model;

[0026] Figure 3 This is a side view of the positioning module of Example 1 of the present utility model;

[0027] Figure 4 This is a bottom view of the positioning module of Example 1 of the present utility model;

[0028] Figure 5 This is a front view of the positioning unit of Example 2 of the present utility model;

[0029] Figure 6 This is an axial view of the positioning unit of Example 2 of the present utility model;

[0030] Figure 7 This is a bottom view of the positioning unit of Example 2 of the present utility model;

[0031] Figure 8 This is a partial front view of the positioning unit of Example 2 of the present utility model (1);

[0032] Figure 9 This is a partial front view (2) of the positioning unit of Example 2 of the present utility model;

[0033] Figure 10 This is a structural schematic diagram of the welding equipment of Example 3 of the present utility model.

[0034] Markings in the figure:

[0035] 100, support mechanism; 101, support platform; 102, drive motor; 200, welding mechanism; 300, welding positioning mechanism;

[0036] 1. Driving module; 11. First driving unit; 12. Second driving unit;

[0037] 2. Positioning module; 21. Positioning unit; 211. First pressure block; 2111. Accommodating cavity; 212. Second pressure block; 213. Third pressure block; 22. First floating unit; 221. First floating assembly; 2211. First mounting bracket; 2212. First slide rail; 2213. First spring; 222. Second floating assembly; 2221. Second mounting bracket; 2222. Second slide rail; 2223. Second spring; 23. Second floating unit; 231. Third spring;

[0038] h0, reference plane height; h1, height of the lower surface of the first pressing block; h2, height of the lower surface of the second pressing block; h3, height of the lower surface of the third pressing block;

[0039] d1, height difference between the first pressing block and the third pressing block; d2, height difference between the second pressing block and the third pressing block. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0041] 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 rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1

[0043] refer to Figures 1 to 4 The welding positioning mechanism provided in this embodiment includes a drive module 1 and a positioning module 2 that is drivably connected to the drive module 1. The drive module 1 includes a first drive unit 11 for driving the positioning module 2 downward and a second drive unit 12 for driving the positioning module 2 in rotation. The drive end of the first drive unit 11 is connected to the fixed end of the second drive unit 12, and the drive end of the second drive unit 12 is connected to the positioning module 2. In some embodiments, the first drive unit 11 can be a robotic arm or a downward drive cylinder, and the second drive unit 12 can be a rotation drive motor.

[0044] The positioning module 2 includes a positioning unit 21, and a first floating unit 22 and a second floating unit 23 disposed on the positioning unit 21. The first floating unit 22 is used to provide floating space for the positioning unit 21's rotational movement, and the second floating unit 23 is used to provide floating space for the positioning unit 21's downward movement. It is understood that the rotational movement of the positioning unit 21 is horizontal, and accordingly, the floating direction of the first floating unit 22 is also horizontal; the downward movement of the positioning unit 21 is vertical, and accordingly, the floating direction of the second floating unit 23 is also vertical. By providing floating space for the positioning unit 21 during the rotation process through the first floating unit 22 and the downward movement process through the second floating unit 23, scratches and indentations on the battery top cover during the full welding process can be avoided, effectively improving the production quality and aesthetics of the battery product.

[0045] As a further optimization, the first floating unit 22 includes a first floating assembly 221 that floats in the X direction and a second floating assembly 222 that floats in the Y direction. The first floating assembly 221 is connected to the second floating assembly 222, which is then connected to the positioning unit 21. It can be understood that the rotational motion trajectory of the positioning unit 21 is equivalent to a circle centered at the center of the positioning unit 21. Assuming a point along the circumference of the circle is used as a reference point, the X direction points toward the center of the circle, and the Y direction is perpendicular to the X direction. The Y direction points outward from the circle. The combined buoyancy force in the X and Y directions points precisely in the direction of the tangent of the circle. Therefore, the combined action of the first floating assembly 221 and the second floating assembly 222 provides a rotational buoyancy force for the positioning unit 21, thereby reducing relative friction between the positioning unit 21 and the battery cover during rotation, effectively preventing scratches on the battery cover during welding, and thus improving the aesthetics and quality of the battery product.

[0046] As one embodiment, the first floating assembly 221 includes a first mounting frame 2211, a first slide rail 2212, and a first spring 2213. The second floating assembly 222 includes a second mounting frame 2221, a second slide rail 2222, and a second spring 2223. The first mounting frame 2211 is connected to the driving end of the second driving unit 12. The first slide rail 2212 is disposed on the first mounting frame 2211 along the X-direction. The second mounting frame 2221 is slidably connected to the first slide rail 2212. The opposite ends of the second mounting frame 2221 in the X-direction are respectively connected to the first mounting frame 2211 via first springs 2213. The springing direction of the first spring 2213 is the same as the sliding direction of the second mounting frame 2221. The second slide rail 2222 is arranged on the second mounting frame 2221 along the Y direction, and the positioning unit 21 is slidingly connected to the second slide rail 2222. The opposite ends of the positioning unit 21 in the Y direction are respectively connected to the second mounting frame 2221 through the second spring 2223, and the elastic direction of the second spring 2223 is the same as the sliding direction of the positioning unit 21.

[0047] It can be understood that the first slide rail 2212 provides space for the second mounting frame 2221 to move back and forth along the X direction, the first spring 2213 can control the amplitude of the second mounting frame 2221 moving back and forth along the X direction, the elastic amplitude of the first spring 2213 is equivalent to the movement amplitude of the second mounting frame 2221, and the positioning unit 21 is indirectly connected to the second mounting frame 2221, so the elastic amplitude of the first spring 2213 is equivalent to the floating amplitude of the positioning unit 21 in the X direction; the second slide rail 2222 provides space for the positioning unit 21 to move back and forth along the Y direction, the second spring 2223 can control the amplitude of the positioning unit 21 moving back and forth along the Y direction, so the elastic amplitude of the second spring 2223 is equivalent to the floating amplitude of the positioning unit 21 in the Y direction.

[0048] The welding positioning mechanism provided in this embodiment improves the problem of scratches on the battery top cover caused by the relative friction between the positioning unit and the battery top cover during rotation by providing a first floating unit, and improves the problem of indentations on the battery top cover caused by excessive force during the downward pressing of the positioning unit by providing a second floating unit, thereby effectively improving the quality of the product; through the cooperation of the first floating component and the second floating component, a floating force in the rotational direction can be provided to the positioning unit, reducing the mutual friction between the positioning unit and the battery top cover, avoiding scratches on the battery top cover, and improving the aesthetics and quality of the battery product.

[0049] Example 2

[0050] As a further optimization of Example 1, refer to Figures 5 to 9 The positioning unit 21 includes a first pressing block 211 and a second pressing block 212. The first pressing block 211 forms a accommodating cavity 2111 with an opening facing downward. The second pressing block 212 is located in the accommodating cavity 2111. The second pressing block 212 is connected to the top wall of the accommodating cavity 2111 through the second floating unit 23. The height h1 of the lower surface of the first pressing block 211 is higher than the height h2 of the lower surface of the second pressing block 212. Figure 8 , h0 represents the reference plane height, assuming the reference plane height h0 is 0, the distance between the lower surface of the first pressing block 211 and the reference plane is the height h1 of the lower surface of the first pressing block 211, and the distance between the lower surface of the second pressing block 212 and the reference plane is the height h2 of the lower surface of the second pressing block 212.

[0051] It should be noted that when the positioning unit 21 is pressed down, the second pressing block 212 first contacts the battery top cover, and the second floating unit 23 provides space for the second pressing block 212 to move in the vertical direction. During the process of continuing to press down, the second pressing block 212 slowly moves upward in the vertical direction due to the reaction force of the battery top cover. When the movement amplitude of the second pressing block 212 reaches the floating amplitude provided by the second floating unit 23, the second pressing block 212 stops moving. At this time, the height h2 of the lower surface of the second pressing block 212 is basically the same as the height h1 of the lower surface of the first pressing block 211, so that the first pressing block 211 contacts the battery top cover.

[0052] The interaction between the second pressing block 212 and the second floating unit 23 can reduce the pressure exerted by the second pressing block 212 on the battery top cover, thereby preventing the battery top cover from being deformed due to excessive downward pressure from the second pressing block 212, thereby causing an indentation. Since the first pressing block 211 only contacts the battery top cover when the second pressing block 212 stops moving, the force exerted by the first pressing block 211 on the battery top cover is very small and is not likely to cause deformation of the battery top cover. Therefore, by establishing a sequential contact relationship between the second pressing block 212 and the first pressing block 211 and the battery top cover, the problem of the battery top cover being indented by the positioning unit 21 during the downward pressure process can be solved.

[0053] In some embodiments, the number of second pressing blocks 212 may be two, corresponding to the positions of the two battery poles, respectively, so as to better protect the battery tabs from the impact of the downward pressing operation and improve the quality of the battery product.

[0054] In one embodiment, the second floating unit 23 includes a plurality of third springs 231 arranged along the Z direction. The ends of the third springs 231 are respectively connected to the second pressure block 212 and the top wall of the accommodating cavity 2111. It is understood that the spring amplitude of the third springs 231 along the Z direction corresponds to the floating amplitude of the second pressure block 212 along the Z direction, where the Z direction is the vertical direction.

[0055] As a further optimization, the positioning unit 21 also includes a third pressure block 213. The third pressure block 213 is located on the periphery of the second pressure block 212 and connected to the side wall of the accommodating cavity 2111. The height h3 of the lower surface of the third pressure block 213 is between the height h1 of the lower surface of the first pressure block 211 and the height h2 of the lower surface of the second pressure block 212. It can be understood that the third pressure block 213 is embedded between the first pressure block 211 and the second pressure block 212, and the third pressure block 213 is fixedly connected to the first pressure block 211. A gap exists between the third pressure block 213 and the second pressure block 212, so that it does not interfere with the upward and downward movement of the second pressure block 212.

[0056] In this embodiment, the first pressing block 211 is made of a high-temperature resistant metal material, such as steel, and the second pressing block 212 and the third pressing block 213 are both made of an elastic material, such as PEEK. Since the first pressing block 211 is made of a high-temperature resistant metal material and the second and third pressing blocks 212, 213 are made of an elastic material, the first pressing block 211 is located at the outermost layer, which can protect the second and third pressing blocks 212, 213 during the welding process, preventing them from being damaged by the laser beam from the welding mechanism. Furthermore, the first pressing block 211 is the last to come into contact with the battery cover, and the interaction force between the first pressing block 211 and the battery cover is very small. Even if the first pressing block 211 is made of a rigid material, the impact on the battery cover is also minimal. By making the second and third pressing blocks 212, 213 of an elastic material, it is possible to further prevent indentations on the battery cover during the downward pressing operation, further improving the quality and aesthetics of the product.

[0057] In some embodiments, the height difference d1 between the first pressing block 211 and the third pressing block 213 is smaller than the height difference d2 between the second pressing block 212 and the third pressing block 213. In this embodiment, the height difference d1 between the first pressing block 211 and the third pressing block 213 is 0.2 mm, and the height difference d2 between the second pressing block 212 and the third pressing block 213 is 0.8 mm.

[0058] It can be understood that, since the height h1 of the lower surface of the first pressing block 211 is greater than the height h3 of the lower surface of the third pressing block 213 and greater than the height h2 of the lower surface of the second pressing block 212, during the pressing process, the second pressing block 212 first contacts the battery top cover. As the pressing force increases, the third spring 231 is compressed, and the second pressing block 212 moves upward. When the moving distance of the second pressing block 212 reaches the compressible limit of the third spring 231, the second pressing block 212 stops moving. At this time, the height difference between the second pressing block 212 and the third pressing block 213 is eliminated, and the third pressing block 213 is pressed downward. The second pressing block 212 and the third pressing block 213 are in contact with the battery top cover. Since the second pressing block 212 and the third pressing block 213 are made of elastic materials, when the positioning unit 21 continues to press downward under the driving action of the first driving unit 11, the second pressing block 212 and the third pressing block 213 can both be slightly deformed, thereby eliminating the height difference between the third pressing block 213 and the first pressing block 211, so that the first pressing block 211 also contacts the battery top cover, and the first pressing block 211 and the battery top cover can reach a state of mutual adhesion, thereby well protecting the second pressing block 212 and the third pressing block 213 from damage by the welding mechanism.

[0059] The welding positioning mechanism provided in this embodiment reduces the pressure of the second pressing block on the battery top cover through the interaction between the second pressing block and the second floating unit, thereby avoiding undesirable phenomena such as indentation on the battery top cover; by setting the first pressing block to a high-temperature resistant metal material and setting the second and third pressing blocks to an elastic material, it can not only further reduce the extrusion force of the second and third pressing blocks on the battery top cover, but also protect the second and third pressing blocks from damage by the welding mechanism, thereby improving the quality and quality of the battery product and enhancing the product aesthetics.

[0060] Example 3

[0061] refer to Figure 10 The welding device provided in this embodiment includes a support mechanism 100, a welding mechanism 200, and the welding positioning mechanism 300 of Embodiment 1 or 2. The welding positioning mechanism 300 is located above the support mechanism 100, and the welding mechanism 200 is located to the side of the support mechanism 100. Specifically, the support mechanism 100 includes a support table 101 and a drive motor 102 for driving the support table 101 to rotate.

[0062] During the welding operation, the support mechanism 100 positions and fixes the battery body, and then the welding positioning mechanism 300 presses down to fix the battery top cover on the battery body. As the support mechanism 100 and the welding positioning mechanism 300 rotate synchronously, the welding mechanism 200 welds around the battery so that the battery top cover is fully welded to the aluminum shell of the battery body.

[0063] The welding equipment provided in this embodiment, by providing a welding positioning mechanism, can prevent scratches and indentations on the battery top cover during the welding process, thereby improving the production quality of the welding operation and, at the same time, improving the quality and aesthetics of the battery product.

[0064] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0065] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate 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 solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0066] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above contents. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A welding positioning mechanism, characterized in that: It comprises a driving module (1) and a positioning module (2) drivingly connected to the driving module (1); The driving module (1) comprises a first driving unit (11) for driving the positioning module (2) to press downward and a second driving unit (12) for driving the positioning module (2) to rotate; The positioning module (2) comprises a positioning unit (21) and a first floating unit (22) and a second floating unit (23) arranged on the positioning unit (21), wherein the first floating unit (22) is used to provide a floating space for the rotational movement of the positioning unit (21), and the second floating unit (23) is used to provide a floating space for the downward movement of the positioning unit (21).

2. The welding positioning mechanism according to claim 1, characterized in that: The first floating unit (22) comprises a first floating component (221) capable of floating along the X direction and a second floating component (222) capable of floating along the Y direction, the first floating component (221) being connected to the second floating component (222), and the second floating component (222) being connected to the positioning unit (21).

3. The welding positioning mechanism according to claim 2, characterized in that: The first floating assembly (221) includes a first mounting frame (2211), a first slide rail (2212), and a first spring (2213); the second floating assembly (222) includes a second mounting frame (2221), a second slide rail (2222), and a second spring (2223); The first slide rail (2212) is arranged on the first mounting frame (2211) along the X direction, the second mounting frame (2221) is slidably connected to the first slide rail (2212), and the opposite ends of the second mounting frame (2221) in the X direction are respectively connected to the first mounting frame (2211) via first springs (2213), and the springing direction of the first spring (2213) is the same as the sliding direction of the second mounting frame (2221); The second slide rail (2222) is arranged on the second mounting frame (2221) along the Y direction, the positioning unit (21) is slidably connected to the second slide rail (2222), and the two opposite ends of the positioning unit (21) in the Y direction are respectively connected to the second mounting frame (2221) through second springs (2223), and the elastic direction of the second spring (2223) is the same as the sliding direction of the positioning unit (21).

4. The welding positioning mechanism according to claim 1, characterized in that: The positioning unit (21) comprises a first pressing block (211) and a second pressing block (212); the first pressing block (211) is formed with a accommodating cavity (2111) with an opening facing downward; the second pressing block (212) is connected to the top wall of the accommodating cavity (2111) via a second floating unit (23); and the height (h1) of the lower surface of the first pressing block (211) is higher than the height (h2) of the lower surface of the second pressing block (212).

5. The welding positioning mechanism according to claim 4, characterized in that: The second floating unit (23) includes a plurality of third springs (231) arranged along the Z direction, and two ends of the third springs (231) are respectively connected to the second pressing block (212) and the top wall of the accommodating cavity (2111).

6. The welding positioning mechanism according to claim 4, characterized in that: The positioning unit (21) further comprises a third pressing block (213), the third pressing block (213) being located on the periphery of the second pressing block (212) and connected to the side wall of the accommodating cavity (2111), and the height (h3) at which the lower surface of the third pressing block (213) is located is between the height (h1) at which the lower surface of the first pressing block (211) is located and the height (h2) at which the lower surface of the second pressing block (212) is located.

7. The welding positioning mechanism according to claim 6, characterized in that: The first pressing block (211) is made of high-temperature resistant metal material, and the second pressing block (212) and the third pressing block (213) are both made of elastic material.

8. The welding positioning mechanism according to claim 6, characterized in that: A height difference (d1) between the first pressing block (211) and the third pressing block (213) is smaller than a height difference (d2) between the second pressing block (212) and the third pressing block (213).

9. A welding device, characterized in that: The invention comprises a supporting mechanism (100), a welding mechanism (200) and a welding positioning mechanism (300) according to any one of claims 1 to 8, wherein the welding positioning mechanism (300) is located above the supporting mechanism (100), and the welding mechanism (200) is located on the side of the supporting mechanism (100).

10. The welding device according to claim 9, characterized in that The supporting mechanism (100) comprises a supporting platform (101) and a driving motor (102) for driving the supporting platform (101) to rotate.

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