Small cylindrical lithium battery welding tool

Abstract

The small cylindrical lithium battery welding tool comprises a fixed bottom plate and a supporting frame, the supporting frame is movably installed at the upper end of the fixed bottom plate, a butt joint sliding seat is movably installed at the position, located on one side of the supporting frame, of the upper end of the fixed bottom plate, and a fixed clamping seat is fixedly installed at the position, located at the other end of the supporting frame, of the upper end of the fixed bottom plate; butt joint devices used for installing workpieces are arranged on one side of the butt joint sliding base and one side of the fixed clamping base, installation bases used in cooperation with the butt joint devices are arranged in the middles of the outer surfaces of the upper ends of the butt joint sliding base and the fixed clamping base, and the installation bases of the butt joint sliding base are movably connected with the butt joint devices through butt joint ejector rods; the tool can be fixed and in butt joint through workpieces of different lengths, positioning deformation of the large-size workpieces is prevented, the situation that the position needs to be adjusted and the focal length needs to be recalibrated during welding is avoided, workpiece concentricity does not need to be adjusted, deviation during welding is avoided, the welding efficiency is greatly improved, and the welding quality is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field related to battery processing technology, and more specifically relates to a small cylindrical lithium battery welding tool. Background Art

[0002] The small cylindrical lithium battery welding tool is a tool structure used for the sealing welding operation of the cylindrical lithium battery top cover. It can be used to assist in fixing the cylindrical lithium battery shell and its top cover structure. It is specifically a laser welding positioning tool with stable working performance, convenient switching between similar product welding processes, and a compact and lightweight tool structure.

[0003] The patent document with patent number CN110064878A discloses a battery module welding tool, including a bottom plate, a top plate, a left side plate, a right side plate, a front baffle and a rear baffle, a number of welding through holes are provided on the front baffle and the rear baffle, and a limiting groove is provided on the inner wall of the rear baffle; the left side plate is vertically connected to the left end of the bottom plate, the right side plate is vertically connected to the right end of the bottom plate, and the left and right ends of the rear baffle are respectively vertically connected to the left side plate and the right side plate; the top plate is movably connected to the left side plate, the right side plate and the rear baffle respectively; one end of the front baffle is hinged to the left side plate, and the other end is movably connected to the right side plate, and a locking piece is provided between the front baffle and the right side plate; the battery module welding tool is simple to operate, the assembly efficiency of the tool is high, the workpiece is easy to take, the operability of the employees is enhanced, the production time of the product is shortened, and the production efficiency can be greatly improved.

[0004] The above-mentioned tooling has certain deficiencies when performing lithium battery welding and fixing operations. The above-mentioned tooling structure can only meet the welding and fixing operations of block lithium batteries. When processing small cylindrical lithium batteries, it is necessary to perform rotational sealing welding on the battery top cover. The above-mentioned fixture cannot meet the use of its rotational welding, which reduces the welding quality of the top cover structure of the small cylindrical lithium battery; secondly, small cylindrical lithium batteries have different models, and small cylindrical lithium batteries of different models have different calibers, and the above-mentioned fixture cannot quickly complete the docking and fixing operations of small cylindrical lithium batteries with different calibers, which reduces its scope of application; secondly, when performing sealing welding operations on the top covers at both ends of the small cylindrical lithium battery, auxiliary support is required for the middle part of the small cylindrical lithium battery, and the above-mentioned tooling structure cannot meet the use of rotational auxiliary support, and cannot be adjusted arbitrarily according to the size and position of the middle structure of the lithium battery, which reduces its flexibility when used. Summary of the invention

[0005] The purpose of the present invention is to provide a small cylindrical lithium battery welding tool to solve the existing problems.

[0006] The problem to be solved by the present invention is:

[0007] 1. The above-mentioned tooling structure can only meet the welding and fixing operations of block lithium batteries. When processing small cylindrical lithium batteries, it is necessary to perform rotary sealing welding on the battery top cover. The above-mentioned fixture cannot meet the requirements of its rotary welding, which reduces the welding quality of the top cover structure of the small cylindrical lithium battery.

[0008] 2. Secondly, small cylindrical lithium batteries have different models, and small cylindrical lithium batteries of different models have different diameters. The above-mentioned fixture cannot quickly complete the docking and fixing operation of small cylindrical lithium batteries of different diameters, which reduces its scope of application;

[0009] 3. Secondly, when performing sealing welding operations on the top covers at both ends of the small cylindrical lithium battery, auxiliary support is required for the middle part of the small cylindrical lithium battery. However, the above-mentioned tooling structure cannot meet the requirements of the use of rotating auxiliary support, and cannot be adjusted arbitrarily according to the size and position of the middle structure of the lithium battery, which reduces its flexibility during use.

[0010] The purpose of the present invention can be achieved through the following technical solutions:

[0011] The cam is secured to the upper and lower surfaces of the support frame and is adapted to engage the support member so as to engage with the support member when the support member is in a free position.

[0012] As a further technical solution of the present invention, the support frame and the sliding seat are driven by a screw rod, a limiting slide groove is provided in the middle of the upper end of the support frame, and a docking slider used in conjunction with the limiting slide groove is provided in the middle of the lower end of the sliding seat. In order to meet the auxiliary fixation of cylindrical lithium batteries of different models, the two groups of sliding seats are provided to provide auxiliary support in the middle of the cylindrical lithium battery, while meeting the rotation welding of the cylindrical lithium battery. By rotating the screw rod, the screw rod drives the sliding seat using a threaded structure, and the two groups of sliding seats are moved in conjunction with the docking of the docking slider and the limiting slide groove, thereby adjusting the distance between the two groups of sliding seats, so that the sliding seat is stuck in the belly position of the cylindrical lithium battery structure.

[0013] As a further technical solution of the present invention, a pulley is provided at the lower part of the support frame, an upper roller is movably installed on one side of the sliding card seat, and a lower roller is movably installed on one side of the sliding card seat located below the upper roller. A double roller structure is formed by using the upper roller and the lower roller. When two groups of sliding card seats are placed on both sides of the columnar lithium battery structure, the upper roller and the lower roller will contact the surface of the columnar lithium battery structure. When the columnar lithium battery structure is rotationally welded, the upper roller and the lower roller perform a rotation operation. The setting of the upper roller and the lower roller can better adapt to columnar lithium battery structures of different sizes.

[0014] As a further technical solution of the present invention, a first spring is provided in the mounting seat of the docking slide for use with a docking push rod, a movable top ring is movably sleeved on the outer surface of the docking push rod, and a pressure sensor is provided at the end of the docking push rod. By utilizing the setting of the first spring, one end of the docking push rod has an elastic structure. When the columnar lithium battery structure is placed between the docking slide and the fixed seat, the pneumatic push rod is driven by the cylinder to push the docking slide, and a group of docking devices are driven to move through the docking slide to adjust the distance between the two groups of docking devices. The docking state of the docking device is judged by the pressure sensor. When the docking device completes the docking operation, the cylinder stops operating. The setting of the first spring can elastically dock one end of the columnar lithium battery structure through the docking push rod to improve its docking tightness.

[0015] As a further technical solution of the present invention, the docking device includes a docking sleeve and three groups of docking clips, the three groups of docking clips are distributed in a ring shape on the inner side of the docking sleeve, and the docking device is fixedly installed on the outer surface of one end of the docking top rod. The docking clips of the docking sleeve can meet the docking operation of columnar lithium battery structures with different calibers. The three groups of docking clips can fix the outer surface of the columnar lithium battery structure from three points respectively, and by adjusting the positions of the three groups of docking clips, the fixed use of structures with different calibers can be met.

[0016] As a further technical solution of the present invention, the docking clamp includes a threaded column and a telescopic column, the telescopic column is movably sleeved on the inner side of one end of the threaded column, the threaded column and the telescopic column are elastically connected by a spring, and a spherical clamp is fixedly installed on the outer surface of one end of the telescopic column. During operation, the threaded column and the docking sleeve pass through the threaded sleeve. The user rotates the threaded column according to the caliber of the columnar lithium battery structure, so that the threaded structure between the threaded column and the docking sleeve drives the spherical clamp to move, and the three groups of spherical clamps are respectively clamped on the outer surface of the columnar lithium battery structure to complete the fixing operation of the columnar lithium battery structure. The setting of the spring between the threaded column and the telescopic column makes the spherical clamp have an elastic fixing structure, thereby improving the fixing effect of the spherical clamp.

[0017] As a further technical solution of the present invention, a telescopic pin is movably installed on the inner side of the docking pin, and a limiting ring is movably sleeved between the telescopic pin and the docking pin. By utilizing the setting of the telescopic pin, when the user presses the docking pin, the telescopic pin can be ejected from the inside of the docking pin, and the end of the cylindrical lithium battery structure stuck in the docking sleeve can be ejected by utilizing the docking pin.

[0018] As a further technical solution of the present invention, one end of the telescopic top head is butt-jointed and fixed with a movable top ring, and a second spring is provided between the limiting ring and the telescopic top head. By utilizing the second spring and the limiting ring, the telescopic top head has an elastic reset structure, and when the butt-jointed top rod is released, the telescopic top head retracts into the inside of the butt-jointed top rod.

[0019] As a further technical solution of the present invention, a cylinder is fixedly installed at one end of the fixed base plate, and the cylinder and the docking slide are driven by a pneumatic push rod. The pneumatic push rod is driven by the cylinder to drive the pneumatic push rod, so that the pneumatic push rod drives the docking slide to move.

[0020] As a further technical solution of the present invention, the docking device of the fixed card seat and the motor are movably connected via a rotating rod, and the docking device is an annular structure as a whole.

[0021] Beneficial effects of the present invention:

[0022] 1. By setting up the cylinder and docking slide, when the small cylindrical lithium battery welding tool is used, the cylinder stroke and roller support structure are controlled by the pressure sensor, so that the tool can use workpieces of different lengths for fixing and docking, preventing large-size workpieces from being positioned and deformed, avoiding the need to adjust the position and recalibrate the focal length during welding, and avoiding the need to adjust the concentricity of the workpiece to avoid offset during welding, which greatly improves the welding efficiency and affects the welding quality. The product can be embedded in the automated assembly line by expanding the electronic control system, further improving the automation of laser welding, and replacing the original manual tooling clamping effect;

[0023] During operation, the user first adjusts the position between the docking slide and the fixed card seat according to the length of the small cylindrical lithium battery, inserts the two battery top covers into the docking device respectively, and then places the cylindrical lithium battery shell structure between the docking slide and the fixed card seat. By setting the first spring, one end of the docking push rod has an elastic structure. When the cylindrical lithium battery structure is placed between the docking slide and the fixed card seat, the pneumatic push rod is driven by the cylinder to push the docking slide, and a group of docking devices are driven to move through the docking slide to adjust the distance between the two groups of docking devices. The pressure sensor is used to judge The docking state of the disconnect docking device is disconnected. When the docking device completes the docking operation, the cylinder stops running. The setting of the first spring can elastically dock one end of the columnar lithium battery structure through the docking push rod to improve its docking tightness. When performing the rotational welding operation of the end cover, the motor is used to drive the rotating rod, so that the rotating rod drives the docking device on the fixed card seat to rotate, and the active docking sleeve is used to allow the battery main body structure to rotate between the docking slide and the fixed card seat while satisfying the fixed operation of the end cover structure, and cooperate with the laser welding machine to complete the rotational welding operation of the battery top cover.

[0024] 2. By setting a docking device, when the small cylindrical lithium battery welding tool is used, it can be flexibly applied to the docking operation of battery end cover structures with different calibers, thereby meeting the rotation welding of small cylindrical lithium batteries of different models and improving its scope of use;

[0025] During operation, the user rotates the threaded column according to the caliber of the cylindrical lithium battery structure, so that the threaded structure between the threaded column and the docking sleeve drives the spherical clamp to move, and the three groups of spherical clamps are respectively clamped on the outer surface of the cylindrical lithium battery structure to complete the fixing operation of the cylindrical lithium battery structure. The setting of the spring between the threaded column and the telescopic column makes the spherical clamp have an elastic fixing structure, which improves the fixing effect of the spherical clamp. At the same time, when repeatedly installing the battery top cover, by squeezing the battery end cover, the spring can be used to shrink the telescopic column inward, so that the spherical clamp can be adaptively adjusted in position, thereby quickly completing the installation operation of the battery top cover. The docking clamps of the docking sleeve can meet the docking operation of cylindrical lithium battery structures of different calibers. The three groups of docking clamps can fix the outer surface of the cylindrical lithium battery structure from three points respectively. By adjusting the position of the three groups of docking clamps, the fixed use of battery structures of different calibers can be met.

[0026] 3. By setting a support frame and a movable clamp, when the small cylindrical lithium battery welding tool is used, the use of the docking device is optimized so that it can meet the rotating auxiliary support of small cylindrical lithium batteries of different calibers, and has a double ball support structure to ensure the coaxiality of the workpiece after fixation;

[0027] During operation, in order to meet the auxiliary fixation of cylindrical lithium batteries of different models, the setting of two groups of sliding clamps can be used to provide auxiliary support for the middle part of the cylindrical lithium battery, and at the same time meet the use of rotary welding of the cylindrical lithium battery. By rotating the screw rod, the screw rod uses the threaded structure to drive the sliding clamp, and cooperates with the docking slider and the limiting slide groove to move the two groups of sliding clamps, thereby adjusting the distance between the two groups of sliding clamps, so that the sliding clamps are stuck in the abdominal position of the cylindrical lithium battery structure, and a double roller structure is formed by using the upper roller and the lower roller. When the two groups of sliding clamps are placed on both sides of the cylindrical lithium battery structure, the upper roller and the lower roller will contact the surface of the cylindrical lithium battery structure. When the cylindrical lithium battery structure is rotationally welded, the upper roller and the lower roller perform a rotating operation. The setting of the upper roller and the lower roller can better adapt to cylindrical lithium battery structures of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the overall structure of a small cylindrical lithium battery welding tool of the present invention;

[0030] Figure 2 This is an overall structural diagram of a support frame in a small cylindrical lithium battery welding tooling of the present invention;

[0031] Figure 3 This is an overall structural diagram of a sliding holder in a small cylindrical lithium battery welding tool of the present invention;

[0032] Figure 4 This is an overall structural diagram of a docking slide in a small cylindrical lithium battery welding tooling of the present invention;

[0033] Figure 5 This is a planar structural diagram of a butt joint in a small cylindrical lithium battery welding tooling of the present invention;

[0034] Figure 6 It is an internal structure diagram of a butt-jointed ejector rod in a small cylindrical lithium battery welding tool of the present invention.

[0035] In the figure: 1. slide rail; 2. fixed base plate; 3. support frame; 4. mounting seat; 5. cylinder; 6. docking slide seat; 7. pneumatic push rod; 8. docking device; 9. moving clamp; 10. fixed clamp seat; 11. motor; 12. pulley; 13. screw rod; 14. sliding clamp seat; 15. limiting slide groove; 16. telescopic top head; 17. docking slider; 18. lower roller; 19. upper roller; 20. limiting ring; 21. docking sleeve; 22. moving top ring; 23. first spring; 24. docking top rod; 25. docking clamp; 26. spherical clamp head; 27. telescopic column; 28. threaded sleeve; 29. ​​threaded column; 30. second spring. DETAILED DESCRIPTION

[0036] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0037] like Figure 1 As shown, a small cylindrical lithium battery welding tool comprises a fixed base plate 2 and a support frame 3, the support frame 3 is movably mounted on the upper end of the fixed base plate 2, the upper end of the fixed base plate 2 is located on one side of the support frame 3 and is movably mounted with a docking slide 6, and the upper end of the fixed base plate 2 is located on the other end of the support frame 3 and is fixedly mounted with a fixed card seat 10; one side of the docking slide 6 and the fixed card seat 10 are both provided with a docking device 8 for mounting a workpiece, and the middle position of the upper end outer surface of the docking slide 6 and the fixed card seat 10 is provided with a mounting seat 4 used to cooperate with the docking device 8, and the mounting seat 4 of the docking slide 6 and the docking device 8 are movably connected through a docking push rod 24; a movable card member 9 is movably mounted on the upper end outer surface of the support frame 3, and the movable card member 9 includes two groups of sliding card seats 14, which are symmetrically arranged between the two groups of sliding card seats 14, and one end of the fixed card seat 10 is provided with a motor 11 used to cooperate with the docking device 8, and the upper end outer surface of the fixed base plate 2 is fixedly mounted with a slide rail 1 used to cooperate with the docking slide 6 and the support frame 3.

[0038] In order to solve the support problem when welding cylindrical lithium batteries with different diameters, such as Figure 2 As shown, the support frame 3 and the sliding card seat 14 are driven by a screw rod 13, and a limiting slide groove 15 is provided at the middle position of the upper end of the support frame 3, and a docking slider 17 used in conjunction with the limiting slide groove 15 is provided at the middle position of the lower end of the sliding card seat 14. In order to meet the auxiliary fixation of cylindrical lithium batteries of different types, the two groups of sliding card seats 14 are set to provide auxiliary support in the middle of the cylindrical lithium battery, and at the same time meet the use of rotary welding of the cylindrical lithium battery. By rotating the screw rod 13, the screw rod 13 drives the sliding card seat 14 using the threaded structure, and cooperates with the docking slider 17 and the limiting slide groove 15 to make the two groups of sliding card seats 14 move, thereby adjusting the distance between the two groups of sliding card seats 14, so that the sliding card seat 14 is stuck in the belly position of the cylindrical lithium battery structure.

[0039] like Figure 3As shown, a pulley 12 is provided at the lower portion of the support frame 3, an upper roller 19 is movably installed on one side of the sliding card seat 14, and a lower roller 18 is movably installed on one side of the sliding card seat 14 located below the upper roller 19. A double roller structure is formed by using the upper roller 19 and the lower roller 18. When two groups of sliding card seats 14 are placed on both sides of the columnar lithium battery structure, the upper roller 19 and the lower roller 18 will contact the surface of the columnar lithium battery structure. When the columnar lithium battery structure is rotationally welded, the upper roller 19 and the lower roller 18 rotate. The setting of the upper roller 19 and the lower roller 18 can better adapt to columnar lithium battery structures of different sizes.

[0040] To solve the problem of rotational docking during welding of cylindrical lithium batteries, Figure 4 As shown, a first spring 23 for cooperating with a docking push rod 24 is provided in the mounting seat 4 of the docking slide 6. A movable push ring 22 is movably sleeved on the outer surface of the docking push rod 24. A pressure sensor is provided at the end of the docking push rod 24. The setting of the first spring 23 makes one end of the docking push rod 24 have an elastic structure. When the columnar lithium battery structure is placed between the docking slide 6 and the fixed base 10, the cylinder 5 drives the pneumatic push rod 7, so that the pneumatic push rod 7 pushes the docking slide 6, and drives a group of docking devices 8 to move through the docking slide 6 to adjust the distance between the two groups of docking devices 8. The docking state of the docking device 8 is judged by the pressure sensor. When the docking device 8 completes the docking operation, the cylinder 5 stops running. The setting of the first spring 23 can elastically dock one end of the columnar lithium battery structure through the docking push rod 24 to improve its docking tightness.

[0041] In order to solve the docking problem when welding cylindrical lithium batteries with different diameters, Figure 5 As shown, the docking device 8 includes a docking sleeve 21 and three groups of docking clamps 25. The three groups of docking clamps 25 are distributed in a ring shape on the inner side of the docking sleeve 21, and the docking device 8 is fixedly installed on the outer surface of one end of the docking top rod 24. The docking sleeve 21 is movably sleeved on one end of the docking top rod 24. The docking clamps 25 of the docking sleeve 21 can meet the docking operation of columnar lithium battery structures with different calibers. The three groups of docking clamps 25 can fix the outer surface of the columnar lithium battery structure from three points respectively. By adjusting the positions of the three groups of docking clamps 25, the fixed use of different calibers can be met.

[0042] like Figure 5As shown, the docking clamp 25 includes a threaded column 29 and a telescopic column 27. The telescopic column 27 is movably sleeved on the inner side of one end of the threaded column 29. The threaded column 29 and the telescopic column 27 are elastically connected by a spring. A spherical clamp 26 is fixedly installed on the outer surface of one end of the telescopic column 27. During operation, the threaded column 29 and the docking sleeve 21 pass through the threaded sleeve 28. The user rotates the threaded column 29 according to the caliber of the columnar lithium battery structure, so that the threaded column 29 and the docking sleeve 21 are driven by the threaded structure to move the spherical clamp 26, and the three groups of spherical clamps 26 are respectively clamped on the outer surface of the columnar lithium battery structure to complete the fixing operation of the columnar lithium battery structure. The setting of the spring between the threaded column 29 and the telescopic column 27 makes the spherical clamp 26 have an elastic fixing structure, thereby improving the fixing effect of the spherical clamp 26.

[0043] like Figure 6 As shown, a telescopic top head 16 is movably installed on the inner side of the docking top rod 24, and a limit ring 20 is movably sleeved between the telescopic top head 16 and the docking top rod 24. By utilizing the arrangement of the telescopic top head 16, when the user presses the docking top rod 24, the telescopic top head 16 can be ejected from the inside of the docking top rod 24, and the end of the cylindrical lithium battery structure stuck in the docking sleeve 21 can be ejected by utilizing the docking top rod 24.

[0044] One end of the telescopic top head 16 is fixedly docked with the movable top ring 22, and a second spring 30 is provided between the limiting ring 20 and the telescopic top head 16. By utilizing the second spring 30 and the limiting ring 20, the telescopic top head 16 has an elastic reset structure. When the docking top rod 24 is released, the telescopic top head 16 retracts into the inside of the docking top rod 24.

[0045] A cylinder 5 is fixedly mounted on one end of the fixed base plate 2. The cylinder 5 and the docking slide 6 are driven by a pneumatic push rod 7. The pneumatic push rod 7 is driven by the cylinder 5, so that the pneumatic push rod 7 drives the docking slide 6 to move.

[0046] The docking device 8 of the fixed card seat 10 and the motor 11 are movably connected through a rotating rod, and the docking device 8 is an annular structure as a whole;

[0047] When in use, the traditional tooling structure can only meet the welding and fixing operations of block lithium batteries. When processing small cylindrical lithium batteries, it is necessary to perform rotary sealing welding on the battery top cover. The above-mentioned fixture cannot meet the requirements of its rotary welding, which reduces the welding quality of the top cover structure of the small cylindrical lithium battery.

[0048] To this end, by setting the cylinder 5 and the docking slide 6, when the small cylindrical lithium battery welding tool is used, the stroke of the cylinder 5 and the roller support structure are controlled by the pressure sensor, so that the tool can use workpieces of different lengths for fixing and docking, to prevent large-size workpieces from being positioned and deformed, to avoid the need to adjust the position and recalibrate the focal length during welding, and to avoid the need to adjust the concentricity of the workpiece, to avoid offset during welding, which greatly improves the welding efficiency and affects the welding quality. The product can be embedded in the automated assembly line by expanding the electronic control system, to further improve the automation of laser welding, and to replace the original manual tool clamping effect;

[0049] During operation, the user first adjusts the position between the docking slide 6 and the fixed card seat 10 according to the length of the small cylindrical lithium battery, inserts the two battery top covers into the docking device 8 respectively, and then places the cylindrical lithium battery shell structure between the docking slide 6 and the fixed card seat 10. The first spring 23 is set so that one end of the docking push rod 24 has an elastic structure. When the cylindrical lithium battery structure is placed between the docking slide 6 and the fixed card seat 10, the cylinder 5 drives the pneumatic push rod 7 so that the pneumatic push rod 7 pushes the docking slide 6, and drives a group of docking devices 8 to move through the docking slide 6, and adjusts the distance between the two groups of docking devices 8. The pressure sensor The device judges the docking state of the docking device 8. When the docking device 8 completes the docking operation, the cylinder 5 stops running. The setting of the first spring 23 can elastically dock one end of the columnar lithium battery structure through the docking push rod 24 to improve its docking tightness. When performing the rotation welding operation of the end cover, the motor 11 is used to drive the rotating rod, so that the rotating rod drives the docking device 8 on the fixed card seat 10 to rotate. The active docking sleeve 21 is used to make it possible to rotate the battery main structure between the docking slide seat 6 and the fixed card seat 10 while satisfying the end cover structure fixing operation, and cooperate with the laser welding machine to complete the rotation welding operation of the battery top cover;

[0050] Secondly, small cylindrical lithium batteries have different models, and small cylindrical lithium batteries of different models have different diameters, and the above-mentioned fixture cannot quickly complete the docking and fixing operation of small cylindrical lithium batteries of different diameters, which reduces its scope of application;

[0051] To this end, by providing a docking device 8, when the small cylindrical lithium battery welding tool is used, it can be flexibly applied to the docking operation of battery end cover structures of different calibers, thereby satisfying the rotation welding of small cylindrical lithium batteries of different models and improving its scope of use;

[0052] During operation, the user rotates the threaded column 29 according to the caliber of the columnar lithium battery structure, so that the threaded structure between the threaded column 29 and the docking sleeve 21 drives the spherical clamp 26 to move, and the three groups of spherical clamps 26 are respectively clamped on the outer surface of the columnar lithium battery structure to complete the fixing operation of the columnar lithium battery structure. The setting of the spring between the threaded column 29 and the telescopic column 27 makes the spherical clamp 26 have an elastic fixing structure, which improves the fixing effect of the spherical clamp 26. At the same time, when repeatedly installing the battery top cover, by squeezing the battery end cover, the spring can be used to shrink the telescopic column 27 inward, so that the spherical clamp 26 can be adaptively adjusted in position, thereby quickly completing the installation operation of the battery top cover. The docking clamp 25 of the docking sleeve 21 can meet the docking operation of columnar lithium battery structures with different calibers. The three groups of docking clamps 25 can fix the outer surface of the columnar lithium battery structure from three points respectively. By adjusting the position of the three groups of docking clamps 25, the fixed use of battery structures with different calibers can be met.

[0053] Secondly, when performing sealing welding operations on the top covers at both ends of the small cylindrical lithium battery, it is necessary to provide auxiliary support for the middle part of the small cylindrical lithium battery, but the above-mentioned tooling structure cannot meet the use of rotating auxiliary support, and cannot be adjusted arbitrarily according to the size and position of the middle structure of the lithium battery, which reduces its flexibility when used;

[0054] To this end, by setting the support frame 3 and the movable clamp 9, when the small cylindrical lithium battery welding tool is used, the use of the docking device 8 is optimized so that it can meet the rotary auxiliary support of small cylindrical lithium batteries of different calibers, and has a double ball support structure to ensure the coaxiality of the workpiece after it is fixed;

[0055] During operation, in order to meet the auxiliary fixation of cylindrical lithium batteries of different models, the setting of two groups of sliding clamps 14 can be used to provide auxiliary support for the middle part of the cylindrical lithium battery, and at the same time meet the use of rotary welding of the cylindrical lithium battery. By rotating the screw rod 13, the screw rod 13 drives the sliding clamp 14 using the threaded structure, and cooperates with the docking slider 17 and the limiting slide groove 15 to make the two groups of sliding clamps 14 move, thereby adjusting the distance between the two groups of sliding clamps 14, so that the sliding clamp 14 is stuck in the abdominal position of the cylindrical lithium battery structure, and the upper roller 19 and the lower roller 18 are used to form a double roller structure. When the two groups of sliding clamps 14 are placed on both sides of the cylindrical lithium battery structure, the upper roller 19 and the lower roller 18 will contact the surface of the cylindrical lithium battery structure. When the cylindrical lithium battery structure is rotary welded, the upper roller 19 and the lower roller 18 are rotated. The setting of the upper roller 19 and the lower roller 18 can better adapt to cylindrical lithium battery structures of different sizes.

[0056] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A small cylindrical lithium battery welding tool, characterized in that: The invention comprises a fixed base plate (2) and a support frame (3), wherein the support frame (3) is movably mounted on the upper end of the fixed base plate (2), the upper end of the fixed base plate (2) is located on one side of the support frame (3) and is movably mounted with a docking slide (6), and the upper end of the fixed base plate (2) is located on the other end of the support frame (3) and is fixedly mounted with a fixed clamping seat (10); one side of the docking slide (6) and the fixed clamping seat (10) are both provided with a docking device (8) for mounting a workpiece, and the middle position of the upper end outer surface of the docking slide (6) and the fixed clamping seat (10) are both provided with a docking device (8) for cooperating with the docking device (8) so as to enable the workpiece to be mounted. The invention relates to a mounting seat (4) for docking, wherein the mounting seat (4) of the docking slide (6) and the docking device (8) are movably connected via a docking top rod (24); a movable card (9) is movably mounted on the outer surface of the upper end of the support frame (3), and the movable card (9) includes two groups of sliding card seats (14), and the two groups of sliding card seats (14) are symmetrically arranged; one end of the fixed card seat (10) is provided with a motor (11) used in conjunction with the docking device (8); and a slide rail (1) used in conjunction with the docking slide (6) and the support frame (3) is fixedly mounted on the outer surface of the upper end of the fixed base plate (2).

2. A small cylindrical lithium battery welding tool according to claim 1, characterized in that: The support frame (3) and the sliding seat (14) are driven by a screw rod (13); a limiting slide groove (15) is provided at the middle of the upper end of the support frame (3); and a docking slide block (17) used in conjunction with the limiting slide groove (15) is provided at the middle of the lower end of the sliding seat (14).

3. A small cylindrical lithium battery welding tool according to claim 1, characterized in that: A pulley (12) is provided at the lower part of the support frame (3); an upper roller (19) is movably mounted on one side of the sliding seat (14); and a lower roller (18) is movably mounted on one side of the sliding seat (14) below the upper roller (19).

4. A small cylindrical lithium battery welding tool according to claim 1, characterized in that: A first spring (23) for use with a docking push rod (24) is arranged in the mounting seat (4) of the docking slide seat (6); a movable push ring (22) is movably sleeved on the outer surface of the docking push rod (24); and a pressure sensor is arranged at the end of the docking push rod (24).

5. A small cylindrical lithium battery welding tool according to claim 1, characterized in that: The docking device (8) comprises a docking sleeve (21) and three groups of docking clamps (25), wherein the three groups of docking clamps (25) are distributed in an annular shape on the inner side of the docking sleeve (21), and the docking device (8) is fixedly mounted on the outer surface of one end of the docking top rod (24), and the docking sleeve (21) is movably sleeved on one end of the docking top rod (24).

6. A small cylindrical lithium battery welding tool according to claim 5, characterized in that: The docking clamp (25) comprises a threaded column (29) and a telescopic column (27), wherein the telescopic column (27) is movably sleeved on the inner side of one end of the threaded column (29), and the threaded column (29) and the telescopic column (27) are elastically connected via a spring, and a spherical clamp (26) is fixedly mounted on the outer surface of one end of the telescopic column (27). During operation, the threaded column (29) and the docking sleeve (21) are connected via a threaded sleeve (28).

7. A small cylindrical lithium battery welding tool according to claim 1, characterized in that: A telescopic head (16) is movably mounted on the inner side of the butt joint push rod (24), and a limiting ring (20) is movably sleeved between the telescopic head (16) and the butt joint push rod (24).

8. A small cylindrical lithium battery welding tool according to claim 7, characterized in that: One end of the telescopic top head (16) is butt-jointed and fixed to the movable top ring (22), and a second spring (30) is provided between the limiting ring (20) and the telescopic top head (16).

9. A small cylindrical lithium battery welding tool according to claim 1, characterized in that: A cylinder (5) is fixedly mounted on one end of the fixed base plate (2), and the cylinder (5) and the docking slide seat (6) are driven by a pneumatic push rod (7).

10. A small cylindrical lithium battery welding tool according to claim 1, characterized in that: The docking device (8) of the fixed card seat (10) and the motor (11) are movably connected via a rotating rod, and the docking device (8) is an annular structure as a whole.

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