Cylindrical battery sealing and welding device

Abstract

The utility model provides a cylindrical battery sealing welding device which comprises a support, a compensation mechanism lifting mechanism, a pressing driving mechanism and a welding gun, and a compensation mechanism is arranged on the support and used for compensating height difference in the cylindrical battery welding process. The lifting mechanism is arranged at the movable end of the compensation mechanism, is used for placing the cylindrical battery and can rotate on the lifting mechanism; the pressing driving mechanism is arranged on the support, located on the side, away from the lifting mechanism, of the cylindrical battery and used for pressing the cylindrical battery and driving the cylindrical battery to rotate. The welding gun is arranged on the support, the position of the welding gun corresponds to the sealing position of the cylindrical battery, and the welding gun is used for conducting sealing welding on the rotating cylindrical battery; the device can effectively compensate the height difference of the cylindrical battery in the welding process, ensures that the focus of the battery is kept on the same point during welding, effectively controls the state consistency of a molten pool, reduces the safety risk, and improves the welding quality and consistency.

Description

Technical Field

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

[0002] Battery welding and sealing is a crucial step in the battery manufacturing process. In today's rapidly developing technological world, batteries are the core power source for many electronic devices, and their performance and quality directly affect the operation and lifespan of these devices. The welding and sealing process is an important safeguard to ensure stable and reliable battery performance. During battery production, welding and sealing are necessary to precisely connect and seal the battery casing with components such as terminals.

[0003] CN102672408A discloses a welding fixture, which includes a positioning mechanism, a battery pressing mechanism, and a driving mechanism. The positioning mechanism includes a positioning seat, two positioning shafts fixed on the positioning seat, and four positioning bearings respectively sleeved at both ends of the two positioning shafts. The battery pressing mechanism includes a fixed base, a first telescopic driving member fixed on the fixed base, a guide shaft fixedly connected to the drive shaft of the first telescopic driving member, and two guide bearings respectively sleeved at both ends of the guide shaft. The driving mechanism includes a first support seat, a rotating driving member fixed on the first support seat, a first clamping copper head fixedly connected to the drive shaft of the rotating driving member, a second support seat, a second telescopic driving member fixed on the second support seat, and a second clamping copper head connected to the drive shaft of the second telescopic driving member.

[0004] In the aforementioned prior art, after the welding fixture clamps the battery and positions it, the battery rotates while welding. There will be a certain runout tolerance when the battery rotates, and there will also be a certain error when assembling the cover plate and the battery shell. This causes the roundness of the cylindrical battery to change after the cover is closed. The large runout during rotation will cause changes in the defocusing amount, ultimately leading to an unstable molten pool, defects such as porosity, incomplete welding, and poor airtightness in the weld, which will affect the quality of the product. Utility Model Content

[0005] In view of this, the present invention proposes a cylindrical battery sealing welding device, which can effectively compensate for the height difference that occurs during the welding process of cylindrical batteries, ensure that the focus of the battery is kept at the same point during welding, effectively control the consistency of the molten pool state, close the abnormalities such as defocusing amount fluctuation, false welding, and weld penetration caused by circular runout, reduce safety risks, and thus improve welding quality and consistency.

[0006] The technical solution of this utility model is achieved as follows: This utility model provides a cylindrical battery sealing and welding device, including a bracket, a compensation mechanism, a lifting mechanism, a pressing drive mechanism, and a welding torch, wherein...

[0007] The compensation mechanism is mounted on the support and is used to compensate for the height difference during the welding of cylindrical batteries;

[0008] The lifting mechanism is located on the movable end of the compensation mechanism, is used to hold the cylindrical battery, and can rotate on the lifting mechanism;

[0009] The clamping drive mechanism is mounted on the bracket and located on the side of the cylindrical battery away from the lifting mechanism. It is used to clamp the cylindrical battery and drive the cylindrical battery to rotate.

[0010] The welding torch is mounted on a support, and its position corresponds to the sealing position of the cylindrical battery, for use in sealing the rotating cylindrical battery.

[0011] Based on the above technical solutions, preferably, the compensation mechanism includes a pusher and a top plate, wherein the pusher is vertically mounted on the support, and the telescopic end of the pusher is fixedly connected to the center of the top plate. When the telescopic end of the pusher moves, it pushes the top plate to move along the vertical direction of the support.

[0012] Based on the above technical solutions, preferably, the compensation mechanism further includes several guide components, wherein,

[0013] Several guide components are vertically mounted on the bracket and distributed around the pusher component, and the guide components are centrally symmetrically distributed with respect to the axis of the pusher component's telescopic end.

[0014] Several guide components have their ends away from the support plate passing through the top plate and extending outwards, and are slidably connected to the top plate to guide the movement of the top plate.

[0015] Based on the above technical solutions, preferably, the lifting mechanism includes multiple support rollers, wherein,

[0016] Multiple support rollers are all located on the side of the top plate away from the pusher, and the multiple support rollers are spaced apart from each other;

[0017] The axis of each support roller is parallel to the axis of the cylindrical battery, and each support roller can rotate around its own axis. The cylindrical battery is placed between multiple support rollers.

[0018] Based on the above technical solutions, preferably, the center distance between two adjacent support rollers on the same side is greater than one-half of the diameter of the cylindrical battery and less than two-thirds of the diameter of the cylindrical battery.

[0019] Based on the above technical solutions, preferably, the clamping drive mechanism includes an elastic component, a clamping wheel, and a drive component, wherein,

[0020] The elastic component is vertically mounted on the bracket and located on the side of the cylindrical battery away from the top plate and facing the top plate. The elastic component is provided with a movable end that can elastically extend and retract along the vertical direction of the bracket.

[0021] The clamping wheel is rotatably connected to the movable end of the elastic component, and the clamping wheel is arranged parallel to the axis of the cylindrical battery and abuts against the outside of the cylindrical battery.

[0022] The driving component is located on the movable end of the elastic component, and the output shaft of the driving component is fixedly connected to the axis of the clamping wheel, which is used to drive the clamping wheel to rotate the cylindrical battery.

[0023] Based on the above technical solutions, preferably, the elastic component includes a sleeve, an elastic element, and a connector, wherein,

[0024] The sleeve is vertically mounted on the support and is hollow inside;

[0025] The elastic element is located inside the sleeve;

[0026] One end of the connector is slidably connected inside the sleeve and abuts against the end face of the elastic element. The connector serves as the movable end of the elastic component.

[0027] The elastic element pushes the connector to make the pressure wheel abut against the surface of the cylindrical battery.

[0028] Based on the above technical solutions, the preferred embodiment also includes an industrial camera, a first ranging probe, and a second ranging probe, wherein...

[0029] An industrial camera is mounted on a bracket and is aligned with and opposite to the axis of the cylindrical battery to take pictures of the end face of the cylindrical battery.

[0030] Both the first and second ranging probes are mounted on the side of the welding torch. The acquisition end of the first ranging probe faces the surface of the cylindrical battery and is used to measure the position of the cylindrical battery during welding. The acquisition end of the second ranging probe faces the surface of the top plate and is used to measure the height of the top plate.

[0031] Based on the above technical solutions, preferably, both the support roller and the clamping roller are made of PEEK.

[0032] Based on the above technical solutions, preferably, the pushing component is one of a cylinder, a hydraulic cylinder, or an electric push rod.

[0033] The cylindrical battery sealing and welding device of this invention has the following advantages over the prior art:

[0034] (1) The compensation mechanism can effectively compensate for the height difference that may occur in the cylindrical battery during the welding process, ensuring that the focus of the battery is kept at the same point during welding. This can effectively control the consistency of the molten pool state, close the defocusing fluctuation caused by circular runout, close abnormalities such as false welding and weld penetration, reduce safety risks, and thus improve welding quality and consistency.

[0035] (2) By applying a certain clamping force to the battery through the elastic force of the elastic component, the stability of the battery during the welding process is not only ensured, but also prevented the battery from sliding or shifting during rotation.

[0036] (3) By using an industrial camera, a first ranging probe and a second ranging probe together, it is possible to effectively detect cells with abnormal roundness and size, improve the quality of the welding process, and reduce cost losses. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 these drawings without creative effort.

[0038] Figure 1 This is a perspective view of the cylindrical battery sealing and welding device of this utility model.

[0039] Figure 2 This is a perspective view of the compensation mechanism of the cylindrical battery sealing and welding device of this utility model;

[0040] Figure 3 This is a front view of the cylindrical battery sealing and welding device of this utility model;

[0041] Figure 4 This is another perspective view of the cylindrical battery sealing and welding device of this utility model;

[0042] Figure 5 This is a cross-sectional view of the elastic component of the cylindrical battery sealing and welding device of this utility model;

[0043] Figure 6 This is a schematic diagram of the battery roundness fitting curve of the cylindrical battery sealing and welding device of this utility model.

[0044] Figure 7 This is a schematic diagram showing the battery roundness fitting curve of the cylindrical battery sealing and welding device of this utility model.

[0045] Figure 8 This is a schematic diagram (NG) of the fitting curve of the actual compensation height value of the cylindrical battery sealing and welding device of this utility model.

[0046] Figure 9 A schematic diagram showing the fitting curve of the actual compensation height value of the cylindrical battery sealing and welding device of this utility model.

[0047] Figure 10This is a schematic diagram showing the fitting curve of the defocus deviation value of the cylindrical battery sealing and welding device of this utility model.

[0048] Figure 11 This is a schematic diagram showing the fitting curve of the defocus deviation value of the cylindrical battery sealing and welding device of this utility model. Detailed Implementation

[0049] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0050] like Figure 1-5 As shown, this utility model discloses a cylindrical battery sealing and welding device, comprising a support 1, a compensation mechanism 2, a lifting mechanism 3, a pressing drive mechanism 4, and a welding torch 5. The compensation mechanism 2 is mounted on the support 1 and is used to compensate for height differences during cylindrical battery welding. The lifting mechanism 3 is mounted on the movable end of the compensation mechanism 2 and is used to place the cylindrical battery, and can rotate on the lifting mechanism 3. The pressing drive mechanism 4 is mounted on the support 1 and located on the side of the cylindrical battery away from the lifting mechanism 3, used to press the cylindrical battery and drive it to rotate. The welding torch 5 is mounted on the support 1, and its position corresponds to the sealing position of the cylindrical battery, used for sealing and welding the rotating cylindrical battery.

[0051] It should be noted that the cylindrical battery is placed on the lifting mechanism 3, and the cylindrical battery is pressed by the clamping drive mechanism 4, which drives the cylindrical battery to rotate along its axis on the lifting mechanism 3. The welding torch 5 performs sealing welding on the rotating cylindrical battery. The compensation mechanism 2 can effectively compensate for the height difference that may occur in the cylindrical battery during the welding process. Since there may be dimensional deviations or assembly errors in the battery manufacturing process, the compensation mechanism 2 can automatically adjust to ensure that the focus of the battery is kept at the same point during welding. This can effectively control the consistency of the molten pool state, close the defocusing fluctuation caused by circular runout, close abnormalities such as false welding and weld penetration, improve welding quality, reduce safety risks, and thus improve welding quality and consistency.

[0052] In a preferred embodiment, the compensation mechanism 2 in this embodiment includes a pusher 21 and a top plate 22. The pusher 21 is vertically mounted on the support 1, and the telescopic end of the pusher 21 is fixedly connected to the center of the top plate 22. When the telescopic end of the pusher 21 moves, it pushes the top plate 22 to move vertically along the support 1.

[0053] It is understandable that the pusher 21 is one of a cylinder, a hydraulic cylinder, or an electric push rod.

[0054] It should be noted that the pusher 21 is installed at the center of the top plate 22, so that the force is more even when the pusher 21 pushes the top plate 22 to move, making the structure more stable. At the same time, in this embodiment, an electric push rod is preferred. The electric push rod combines the transmission principle of an electric motor and a lead screw. When the cylindrical battery is placed on the lifting mechanism 3, the compensation mechanism 2 starts to operate. By precisely controlling the extension and retraction of the pusher 21, the height of the top plate 22 can be adjusted to maintain the optimal distance between it and the end face of the cylindrical battery to be welded. This ensures that the heat distribution at the welding point is uniform and the molten pool is stable when the welding gun 5 performs sealing welding, thereby effectively avoiding welding defects such as porosity and incomplete welding, and improving the quality of the product.

[0055] The compensation mechanism 2 in this embodiment also includes several guide members 23. The guide members 23 are all vertically arranged on the support 1 and are distributed around the pusher 21. The guide members 23 are centrally symmetrically distributed with respect to the axis of the telescopic end of the pusher 21. The end of each guide member 23 away from the support 1 passes through the top plate 22 and extends outward, and is slidably connected to the top plate 22 to guide the movement of the top plate 22.

[0056] Specifically, in this embodiment, there are four guide members 23. The four guide members 23 are distributed at each corner of the top plate 22 and are centrally symmetrically distributed. This ensures that the top plate 22 receives uniform support force during movement, thereby effectively preventing the top plate 22 from tilting or shaking. Furthermore, the sliding connection between the guide members 23 and the top plate 22 allows the top plate 22 to move stably along the vertical direction of the support 1, significantly enhancing the overall stability of the compensation mechanism 2 and thus improving the accuracy and quality of welding.

[0057] Understandably, the guide component 23 is made of high-strength, wear-resistant metal material, such as stainless steel or alloy steel. Its surface is precision machined and polished to ensure smooth sliding connection with the top plate 22, reduce frictional resistance, and minimize the impact on the welding of the cylindrical battery.

[0058] The lifting mechanism 3 in this embodiment includes multiple rollers 31, wherein the multiple rollers 31 are all disposed on the side of the top plate 22 away from the pusher 21, and the multiple rollers 31 are spaced apart; the axis of each roller 31 is parallel to the axis of the cylindrical battery, and each roller 31 can rotate around its own axis, and the cylindrical battery is placed between the multiple rollers 31.

[0059] Specifically, in this embodiment, there are four support rollers 31. The four support rollers 31 are located at each corner of the top plate 22 and are not in the same position as the guide member 23. The four support rollers 31 are centrally symmetrically distributed, which can ensure that the cylindrical battery receives uniform support force during the lifting process, thereby effectively preventing the battery from tilting or slipping and ensuring the stability of the lifting. In addition, the four support rollers 31 are spaced apart, so that the lifting mechanism 3 can adapt to cylindrical batteries of different sizes and specifications.

[0060] It is understood that the roller 31 can be made of high-strength, wear-resistant plastic or metal materials, such as nylon or stainless steel. In this embodiment, it is specifically made of PEEK material, and its surface is precision machined and smoothed to ensure a low coefficient of friction and smooth rotation when in contact with the cylindrical battery surface.

[0061] Among them, the center distance between two adjacent support rollers 31 on the same side is greater than one-half of the diameter of the cylindrical battery and less than two-thirds of the diameter of the cylindrical battery.

[0062] It should be noted that this design ensures that the cylindrical battery will not fall or become unstable when placed between the support rollers 31 due to the small gap between the rollers; at the same time, the center distance is less than two-thirds of the diameter of the cylindrical battery, which ensures that the battery has sufficient contact area on the support rollers, reduces damage to the battery surface caused by excessive local pressure, and thus improves the stability of the lifting.

[0063] In a preferred embodiment, the clamping drive mechanism 4 in this embodiment includes an elastic component 41, a clamping wheel 42, and a drive member 43. The elastic component 41 is vertically mounted on the bracket 1 and is located on the side of the cylindrical battery away from the top plate 22 and facing the top plate 22. The elastic component 41 has a movable end that can elastically extend and retract along the vertical direction of the bracket 1. The clamping wheel 42 is rotatably connected to the movable end of the elastic component 41 and is arranged parallel to the axis of the cylindrical battery, abutting against the outer side of the cylindrical battery. The drive member 43 is mounted on the movable end of the elastic component 41, and the output shaft of the drive member 43 is fixedly connected to the axis of the clamping wheel 42, for driving the clamping wheel 42 to rotate the cylindrical battery.

[0064] It should be noted that the elastic component 41 is vertically mounted on the bracket 1 and located on the side of the cylindrical battery away from the top plate 22. This allows the elastic component 41 to adaptively adjust according to the height and shape of the cylindrical battery, ensuring that the clamping roller 42 always maintains close contact with the battery surface. Through the elastic force of the elastic component 41, a certain clamping force is applied to the battery, which not only ensures the stability of the battery during the welding process but also prevents the battery from sliding or shifting during rotation. When the drive component 43 is working, it drives the clamping roller 42 to rotate around its axis, thereby causing the cylindrical battery to rotate together. This allows the welding torch 5 to form a uniform weld on the battery surface, improving the welding quality.

[0065] Specifically, the clamping roller 42 is made of PEEK, which enables the clamping roller 42 to maintain stable performance and reduce wear during long-term contact and rotation with the cylindrical battery surface, thereby extending the service life of the clamping roller 42. In addition, the PEEK material itself has good self-lubricating properties, which can reduce the coefficient of friction between the clamping roller 42 and the cylindrical battery surface, making the battery rotate more smoothly, reducing heat and wear caused by friction, and also helping to improve welding quality.

[0066] In this embodiment, the elastic component 41 includes a sleeve 411, an elastic element 412, and a connector 413. The sleeve 411 is vertically mounted on the bracket 1 and is hollow inside. The elastic element 412 is disposed inside the sleeve 411. One end of the connector 413 is slidably connected inside the sleeve 411 and abuts against the end face of the elastic element 412. The connector 413 serves as the movable end of the elastic component 41. The elastic element 412 pushes the connector 413 to cause the pressure roller 42 to abut against the surface of the cylindrical battery.

[0067] It should be noted that the elastic component 41, through the elastic deformation capability of the elastic element 412, can automatically adapt to changes in the height or shape of the cylindrical battery surface, ensuring that the clamping wheel 42 always applies a stable clamping force; this is beneficial for improving welding quality and reducing welding defects caused by unstable clamping force.

[0068] Specifically, in this embodiment, there are two elastic components 41, which are arranged in parallel at intervals. The clamping wheel 42 is rotatably mounted on two connecting parts 413. The driving component 43 is mounted on one side of the connecting part 413, and the output shaft of the driving component 43 is fixedly connected to the axis of the clamping wheel 42 to drive the clamping wheel 42 to rotate. This double support structure enables the clamping wheel 42 to maintain a more stable posture when subjected to external forces, reducing the swaying or displacement caused by single-sided support, which helps to improve welding quality and reduce the generation of welding defects.

[0069] It is understandable that the drive unit 43 can be an electric motor or a geared motor.

[0070] This embodiment also includes an industrial camera 6, a first ranging probe 7, and a second ranging probe 8. The industrial camera 6 is mounted on the bracket 1 and is aligned with the axis of the cylindrical battery, and is positioned opposite to it, for taking pictures of the end face of the cylindrical battery. The first ranging probe 7 and the second ranging probe 8 are both mounted on the side of the welding torch 5. The acquisition end of the first ranging probe 7 faces the surface of the cylindrical battery and is used to measure the position of the cylindrical battery during welding. The acquisition end of the second ranging probe 8 faces the surface of the top plate 22 and is used to measure the height of the top plate 22.

[0071] It should be noted that the industrial camera 6 takes pictures of the battery end face and generates a curve based on the roundness data and the battery rotation speed as the horizontal axis; it is sent to the PLC; the servo compensation base is controlled to move up and down according to the simulated curve to compensate for the height difference; the first ranging probe 7 is installed on the side of the welding gun 5 to monitor the position change of the battery fixing point during the actual welding process and generate a curve; the second ranging probe 8 detects the height change of the top plate 22.

[0072] This embodiment also includes a compensation algorithm and an NG algorithm. The industrial camera 6 captures the roundness fitting curve of the battery end face and sets the fitting compensation height value to H. The first ranging probe 7 detects the height of the battery apex during the welding process, obtains the defocus deviation value at each welding time point, and fits a curve based on the defocus deviation value at each welding time point, setting the defocus deviation value to Z. The second ranging probe 8 detects the actual compensation height change of the top plate 22 during the welding process, obtains the actual compensation height value at each welding time point, and fits a curve based on the actual compensation height value at each welding time point, setting the actual compensation height value to Y. The cell welding result is determined by calculation based on the different fitted curves.

[0073] like Figure 6 and Figure 7 As shown, the battery's roundness fitting curve is used for calculation. If the maximum fitting compensation height minus the minimum fitting compensation height is ≥1.2mm, i.e. H(max)-H(min)≥1.0mm, then the roundness parameter of the battery is determined to be unacceptable and the battery is discharged to the scrap area.

[0074] like Figure 10 and Figure 11 As shown, the defocus deviation value fitting curve is used for calculation. If the maximum defocus deviation value minus the minimum defocus deviation value is ≥0.2mm, that is, Z(max)-Z(min)≥0.5mm, then the defocus deviation parameter NG of the battery is determined to be unacceptable and the battery is discharged to the scrap area.

[0075] like Figure 8 and Figure 9As shown, calculations are performed based on the fitting curve of the actual compensation height value and the fitting curve of the battery roundness. If the fitting compensation height value minus the actual compensation value is ≥0.5mm at the same time point, i.e., △H-△Z≥0.5mm, then the compensation is deemed to have failed, and the battery is discharged to the scrap area.

[0076] This process effectively detects cells with abnormal roundness and size by combining vision with algorithms. These cells can be reworked, improving the process quality and reducing cost losses. Furthermore, the first ranging probe 7 and the second ranging probe 8 can detect the actual circular runout during the welding process, which reflects the welding stability and helps to screen out defective products.

[0077] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cylindrical battery sealing and welding device, characterized in that, It includes a support (1), a compensation mechanism (2), a lifting mechanism (3), a clamping drive mechanism (4), and a welding torch (5), wherein, The compensation mechanism (2) is set on the bracket (1) to compensate for the height difference during the welding of the cylindrical battery; The lifting mechanism (3) is located on the movable end of the compensation mechanism (2) for placing the cylindrical battery and can rotate on the lifting mechanism (3); The clamping drive mechanism (4) is mounted on the bracket (1) and located on the side of the cylindrical battery away from the lifting mechanism (3), and is used to clamp the cylindrical battery and drive the cylindrical battery to rotate. The welding torch (5) is set on the bracket (1), and the position of the welding torch (5) corresponds to the sealing position of the cylindrical battery, and is used to seal the rotating cylindrical battery.

2. The cylindrical battery sealing and welding device as described in claim 1, characterized in that: The compensation mechanism (2) includes a pusher (21) and a top plate (22). The pusher (21) is vertically mounted on the support (1), and the telescopic end of the pusher (21) is fixedly connected to the center of the top plate (22). When the telescopic end of the pusher (21) moves, it pushes the top plate (22) to move vertically along the support (1).

3. The cylindrical battery sealing and welding device as described in claim 2, characterized in that: The compensation mechanism (2) further includes several guide components (23), wherein, Several guide members (23) are vertically arranged on the bracket (1) and are distributed around the pusher (21). The guide members (23) are centrally symmetrically distributed with respect to the axis of the extension and retraction end of the pusher (21). Several guide members (23) have one end away from the bracket (1) that passes through the top plate (22) and extends outward, and are slidably connected to the top plate (22) to guide the movement of the top plate (22).

4. The cylindrical battery sealing and welding device as described in claim 2, characterized in that: The lifting mechanism (3) includes multiple support rollers (31), wherein, Multiple rollers (31) are all located on the side of the top plate (22) away from the pusher (21), and the multiple rollers (31) are spaced apart from each other; The axis of each support roller (31) is parallel to the axis of the cylindrical battery, and each support roller (31) can rotate around its own axis. The cylindrical battery is placed between multiple support rollers (31).

5. The cylindrical battery sealing and welding device as described in claim 4, characterized in that: The center distance between two adjacent support rollers (31) on the same side is greater than one-half the diameter of the cylindrical battery and less than two-thirds the diameter of the cylindrical battery.

6. The cylindrical battery sealing and welding device as described in claim 4, characterized in that: The clamping drive mechanism (4) includes an elastic component (41), a clamping wheel (42), and a drive component (43), wherein, The elastic component (41) is vertically mounted on the bracket (1) and located on the side of the cylindrical battery away from the top plate (22) and facing the top plate (22). The elastic component (41) is provided with a movable end that can elastically extend and retract along the vertical direction of the bracket (1). The clamping wheel (42) is rotatably connected to the movable end of the elastic component (41), and the clamping wheel (42) is arranged parallel to the axis of the cylindrical battery and abuts against the outside of the cylindrical battery. The drive unit (43) is located on the movable end of the elastic component (41), and the output shaft of the drive unit (43) is fixedly connected to the axis of the clamping wheel (42) to drive the clamping wheel (42) to rotate the cylindrical battery.

7. The cylindrical battery sealing and welding device as described in claim 6, characterized in that: The elastic component (41) includes a sleeve (411), an elastic element (412), and a connector (413), wherein, The sleeve (411) is vertically mounted on the bracket (1) and is hollow inside; The elastic element (412) is disposed inside the sleeve (411); One end of the connector (413) is slidably connected inside the sleeve (411) and abuts against the end face of the elastic member (412). The connector (413) serves as the movable end of the elastic component (41). The elastic element (412) pushes the connector (413) to make the pressure wheel (42) abut against the surface of the cylindrical battery.

8. The cylindrical battery sealing and welding device as described in claim 2, characterized in that: It also includes an industrial camera (6), a first ranging probe (7), and a second ranging probe (8), wherein, An industrial camera (6) is mounted on a bracket (1) and is aligned with the axis of the cylindrical battery and is positioned opposite to it. It is used to take pictures of the end face of the cylindrical battery. The first ranging probe (7) and the second ranging probe (8) are both set on the side of the welding torch (5). The acquisition end of the first ranging probe (7) is set facing the surface of the cylindrical battery and is used to measure the position of the cylindrical battery during welding. The acquisition end of the second ranging probe (8) is set facing the surface of the top plate (22) and is used to measure the height position of the top plate (22).

9. The cylindrical battery sealing and welding device as described in claim 6, characterized in that: The support roller (31) and the pressure roller (42) are both made of PEEK.

10. The cylindrical battery sealing and welding device as described in claim 2, characterized in that: The pusher (21) is one of a cylinder, a hydraulic cylinder or an electric push rod.

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