Automatic sealing mechanism for cylindrical battery

Abstract

The present application relates to the technical field of cylindrical battery sealing technology, and discloses an automatic sealing mechanism for cylindrical batteries, which comprises a sealing base, wherein the sealing base comprises a column; a hollow sleeve is sleeved on the outer side of the column, and the upper inner wall of the hollow sleeve is provided with a first taper surface. The cylindrical battery is placed in the hollow sleeve, the column supports the bottom of the cylindrical battery, the locking assembly is started and drives the hollow sleeve to rise, the hollow sleeve cooperates with the second taper surfaces of the plurality of arc-shaped plates through the first taper surface to make the plurality of arc-shaped plates gather to lock the cylindrical battery, and the cylindrical battery is limited at a position coaxial with the column, and the pressing head assembly is started to seal the cylindrical battery in the plurality of arc-shaped plates. The position of the cylindrical battery can be accurately limited, the sealing precision of the cylindrical battery is effectively improved, the defective rate of the cylindrical battery sealing is reduced, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of cylindrical battery sealing technology, and more specifically to an automatic sealing mechanism for cylindrical batteries. Background Technology

[0002] Lithium-ion batteries are a type of battery that uses lithium metal or lithium alloys as the positive / negative electrode materials and a non-aqueous electrolyte solution. Due to the highly reactive chemical properties of lithium metal, its processing, storage, and use require very strict environmental control. With the development of science and technology, cylindrical lithium-ion batteries have now become the mainstream type of new energy battery.

[0003] Lithium-ion battery packaging processes fall into four main categories: prismatic, blade, cylindrical, and pouch. Cylindrical packaging, due to its unique advantages, has become increasingly popular in recent years. Cylindrical battery sealing can be achieved through welding and push-sealing. Due to the cost of welding equipment and the potential for welding defects, push-sealing offers a relatively higher cost-performance ratio. Currently, push-sealing commonly uses cylinders or pneumatic-hydraulic booster cylinders as power sources, four guide rods for guidance, and an integral slide table to drive the pressure head downwards. The clamps typically employ two semi-circular conformals and pneumatic clamping. However, this method cannot precisely define the position of the cylindrical battery, easily causing it to shift under pressure, leading to poor sealing and increased production costs. Summary of the Invention

[0004] The purpose of this invention is to overcome the problem of high defect rate when sealing cylindrical batteries in the prior art, and to provide an automatic sealing mechanism for cylindrical batteries. This automatic sealing mechanism for cylindrical batteries has the effect of improving the accuracy and pass rate of sealing cylindrical batteries.

[0005] To achieve the above objectives, the present invention provides an automatic sealing mechanism for cylindrical batteries, comprising:

[0006] Pier sealing base, the pier sealing base comprising:

[0007] Column;

[0008] A hollow sleeve is fitted onto the outside of the column, and a first conical surface is provided on the upper inner wall of the hollow sleeve;

[0009] Multiple arc-shaped plates are disposed above the hollow sleeve, and the multiple arc-shaped plates are coaxial. The bottom of the multiple arc-shaped plates extends into the interior of the hollow sleeve and is sleeved on the outer side of the top of the column. The outer side wall of the multiple arc-shaped plates is provided with a second conical surface that mates with the first conical surface.

[0010] A locking assembly is used to drive the hollow sleeve to rise in order to lock the cylindrical battery.

[0011] The pressure head assembly is disposed above the sealing base and is used to cooperate with the plurality of arc-shaped plates to seal the cylindrical battery.

[0012] Optionally, the locking assembly includes:

[0013] A base plate, wherein the column is disposed on top of the base plate;

[0014] A hollow mounting base is disposed on the top of the base plate and sleeved on the outside of the column and the plurality of arc-shaped plates;

[0015] Multiple guide grooves are formed circumferentially on the top of the hollow mounting base;

[0016] Multiple baffles are arranged circumferentially on the side wall of the hollow mounting base;

[0017] Multiple guide seats are respectively disposed inside multiple guide grooves, and one end of each guide seat is fixedly connected to the outer wall of the corresponding arc-shaped plate;

[0018] Multiple first springs, one end of which is connected to the other end of the corresponding guide seat, and the other end of which is connected to the corresponding baffle.

[0019] Optionally, the locking assembly further includes:

[0020] A drive plate is disposed inside the hollow mounting base, and an opening is provided on the drive plate, with the column located inside the opening;

[0021] The first wedge surface is disposed on the top of the drive plate;

[0022] The second wedge surface is disposed at the bottom of the hollow sleeve, and the first wedge surface and the second wedge surface fit together and cooperate with each other;

[0023] A locking cylinder is disposed outside the hollow mounting base and located at the high end of the first wedge surface. The output end of the locking cylinder passes through the hollow mounting base and is connected to the drive plate.

[0024] Optionally, the curved plate comprises three.

[0025] Optionally, the automatic pier sealing mechanism further includes:

[0026] The first guide rail is located at the bottom of the base plate and is slidably connected to the base plate.

[0027] A first sliding module is disposed on the side of the base plate and connected to the base plate, for driving the base plate to move along the extension direction of the first guide rail.

[0028] Optionally, the pressure head assembly includes:

[0029] Workbench;

[0030] Multiple sealing heads are arranged below the workbench and above the hollow mounting base, distributed along the extension direction of the first guide rail;

[0031] Multiple hollow columns are fixedly inserted through the worktable;

[0032] Multiple pressing columns are respectively installed inside the multiple hollow columns, and the bottom of the pressing column is connected to the corresponding pier sealing head;

[0033] Multiple reset components are disposed on the top of the worktable and connected to the top of the corresponding pressing column, for driving the corresponding pressing column to reset;

[0034] A drive component, disposed above the pressing column, is used to drive the pressing column to push the corresponding sealing head downward.

[0035] Optionally, the reset component includes:

[0036] A reset plate is fixedly sleeved on the side wall of the pressing column;

[0037] A guide hole is formed on the worktable;

[0038] The guide rod has one end connected to the bottom of the reset plate and the other end extending into the interior of the guide hole;

[0039] A second spring is sleeved on the outside of the guide rod. One end of the second spring is connected to the bottom of the reset plate, and the other end of the second spring is connected to the top of the worktable.

[0040] Optionally, the driving component includes:

[0041] A support frame is provided on top of the workbench;

[0042] The second guide rail is located at the top of the support frame;

[0043] The skateboard is slidably connected to the second guide rail;

[0044] The pressing lever is positioned above the pressing column;

[0045] An electric cylinder is disposed on the top of the slide plate, and the output end of the electric cylinder passes through the slide plate and is connected to the top of the pressing rod;

[0046] The second sliding module is disposed on the side wall of the support frame and connected to the slide plate, for driving the slide plate to move along the extension direction of the second guide rail.

[0047] Optionally, the driving component further includes:

[0048] Multiple first limiting seats, each having a first limiting hole, are distributed correspondingly to multiple pressing columns;

[0049] The first limiting cylinder is disposed on the side wall of the slide plate;

[0050] A first limiting plug is disposed at the output end of the first limiting cylinder. The first limiting plug is used to cooperate with the first limiting hole to limit the position of the slide plate.

[0051] Optionally, the automatic pier sealing mechanism further includes:

[0052] The second limiting seat is disposed on the side of the base plate away from the first sliding module, and the second limiting seat has a second limiting hole.

[0053] Multiple second limit cylinders are disposed at the bottom of the worktable and are distributed correspondingly to the multiple sealing heads;

[0054] Multiple second limit plugs are respectively disposed at the output ends of multiple second limit cylinders. The second limit plugs are used to cooperate with the second limit holes to limit the position of the base plate.

[0055] Through the above technical solution, the automatic sealing mechanism for cylindrical batteries provided by this invention places the cylindrical battery inside a hollow sleeve, with the column supporting the bottom of the battery. The locking assembly is activated, driving the hollow sleeve to rise. The hollow sleeve, through its first conical surface, engages with the second conical surfaces of multiple arc-shaped plates, causing the arc-shaped plates to converge and lock the cylindrical battery, thus confining it to a position coaxial with the column. The pressure head assembly is then activated to seal the cylindrical battery within the multiple arc-shaped plates. This method of locking the cylindrical battery using the first conical surface of the hollow sleeve and the second conical surfaces of the multiple arc-shaped plates achieves precise positioning of the battery, effectively improving the sealing accuracy, reducing the defect rate, and lowering production costs. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention.

[0057] Figure 2 It is based on Figure 1 Enlarged view of region A in the middle;

[0058] Figure 3 This is a schematic diagram of the structure of the sealing base in an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention.

[0059] Figure 4 It is based on Figure 3 Enlarged view of region B in the middle;

[0060] Figure 5 This is a schematic diagram of the hollow sleeve in an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention.

[0061] Figure 6 This is a schematic diagram of the connection between the column and the arc plate in an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention.

[0062] Figure 7 This is a schematic diagram of an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention.

[0063] Figure 8 It is based on Figure 7 Enlarged view of region C in the middle;

[0064] Figure 9 It is based on Figure 7 Enlarged schematic diagram of region D in the middle;

[0065] Figure 10 A schematic diagram showing the connection between the reset plate and the pressing column in an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention;

[0066] Figure 11 This is a cross-sectional view of an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention.

[0067] Figure 12 It is based on Figure 11 Enlarged schematic diagram of region E in the middle;

[0068] Figure 13 It is based on Figure 11 Enlarged schematic diagram of region F in the middle;

[0069] Figure 14 It is based on Figure 11 A magnified diagram of region G in the middle.

[0070] Explanation of reference numerals in the attached figures

[0071] 1. Electric cylinder 2. Slide plate

[0072] 3. Second sliding module 4. Worktable

[0073] 5. First sliding module; 6. Hollow mounting base

[0074] 7. First guide rail; 8. Second limit cylinder

[0075] 9. Support frame; 10. Second guide rail

[0076] 11. First limit cylinder 12. Pressing rod

[0077] 13. Locking cylinder 14. Base plate

[0078] 15. Curved plate 16. First ring plate

[0079] 17. Baffle plate; 18. Second limit seat

[0080] 19. Guide groove; 20. First spring

[0081] 21. Guide seat; 22. Hollow sleeve

[0082] 23. Opening 24. Driver board

[0083] 25. First wedge surface 26. Second wedge surface

[0084] 27. Column body; 28. Second limit plug

[0085] 29. Second limiting hole; 30. First limiting seat

[0086] 31. First limiting hole; 32. First limiting plug

[0087] 33. Reset plate 34. Pressing column

[0088] 35. Second spring 36. Hollow column

[0089] 37. Pier sealing head; 38. Piston hole

[0090] 39. Guide rod 40. Guide hole

[0091] 41. Annular groove 42. Cover groove

[0092] 43. First conical surface 44. Second conical surface Detailed Implementation

[0093] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0094] Figure 1 This is a schematic diagram of an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the hollow sleeve in an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention. Figure 6 This is a schematic diagram showing the connection between the column and the arc-shaped plate in an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention. Figure 11This is a cross-sectional view of an automatic sealing mechanism for a cylindrical battery according to an embodiment of the present invention. Figure 12 It is based on Figure 11 A magnified view of region E in the middle. Figure 1 , Figure 5 , Figure 6 , Figure 11 as well as Figure 12 The automatic pier sealing mechanism may include a pier sealing base and a pressure head assembly. Specifically, the pier sealing base may include a column 27, a hollow sleeve 22, multiple arc-shaped plates 15, and a locking assembly. Specifically, the hollow sleeve 22 may include a first conical surface 43, and the arc-shaped plates 15 may include a second conical surface 44.

[0095] A hollow sleeve 22 is fitted onto the outer side of the column 27, and a first conical surface 43 is provided on the upper inner wall of the hollow sleeve 22. Multiple arc-shaped plates 15 are disposed above the hollow sleeve 22, and the multiple arc-shaped plates 15 are coaxial. The bottom of the multiple arc-shaped plates 15 extends into the interior of the hollow sleeve 22 and fits onto the top outer side of the column 27. The outer wall of the multiple arc-shaped plates 15 is provided with a second conical surface 44 that mates with the first conical surface 42. A locking assembly is used to drive the hollow sleeve 22 upward to lock the cylindrical battery. A pressure head assembly is disposed above the sealing base and is used to mate with the multiple arc-shaped plates 15 to seal the cylindrical battery.

[0096] When sealing a cylindrical battery, the battery to be sealed is placed inside the sealing base and positioned at the top of the column 27. The locking assembly is activated, causing the hollow sleeve 22 to rise. Since the bottoms of multiple arc-shaped plates 15 extend into the hollow sleeve 22, the second conical surfaces 44 of the arc-shaped plates 15 engage with the first conical surface 43 of the inner wall of the hollow sleeve 22. Therefore, as the hollow sleeve 22 rises, the first conical surface 43 causes the multiple arc-shaped plates 15 to converge along their central axis, thereby achieving the deformation, sealing, and fixation of the cylindrical battery's side. The pressure head assembly is then activated to seal the cylindrical battery.

[0097] Traditional lithium battery packaging often uses two semi-circular conformals and pneumatic clamping. However, this method cannot guarantee precise positioning of the cylindrical battery's sealing axis over long periods, requiring two sets of cylinders to be height-synchronized. Furthermore, the cylindrical battery is prone to displacement under pressure, leading to poor sealing and increased production costs. In this embodiment of the invention, the first conical surface 43 of the hollow sleeve 22 and the second conical surfaces 44 of multiple arc-shaped plates 15 work together to concentrate and secure the cylindrical battery, achieving stable and precise positioning coaxial with the central axis of the multiple arc-shaped plates 15. This facilitates precise sealing of the cylindrical battery by the pressure head assembly, reducing the defect rate and lowering production costs. Additionally, the bottom ends of the multiple arc-shaped plates 15 are fitted onto the outer top of the column 27, which defines the maximum closing position of the cylindrical battery's side, improving the closing accuracy and further ensuring the sealing quality of the cylindrical battery.

[0098] In this embodiment of the invention, the central axis of the plurality of arc plates 15 is coaxial with the axis of the column 27, thereby stably confining the cylindrical battery at the axial position of the column 27, further improving the sealing accuracy and quality of the cylindrical battery.

[0099] In this embodiment of the invention, such as Figure 1 , Figure 3 and Figure 4 As shown, the locking assembly may include a base plate 14, a hollow mounting base 6, multiple guide grooves 19, multiple baffles 17, multiple guide seats 21, and multiple first springs 20.

[0100] A column 27 is positioned on top of a base plate 14, and a hollow mounting base 6 is positioned on top of the base plate 14, fitting around the column 27 and the outer sides of multiple arc-shaped plates 15. Multiple guide grooves 19 are circumferentially formed on the top of the hollow mounting base 6, and multiple baffles 17 are circumferentially formed on the sidewalls of the hollow mounting base 6. Multiple guide seats 21 are respectively disposed inside the multiple guide grooves 19, with one end of each guide seat 21 connected to the outer sidewall of the corresponding arc-shaped plate 15. One end of each multiple first spring 20 is connected to the other end of the corresponding guide seat 21, and the other end of each first spring 20 is connected to the corresponding baffle 17.

[0101] When sealing a cylindrical battery, the battery is placed between three curved plates 15. The battery pushes the curved plates 15, and the reaction force of the first spring 20 on the corresponding guide seat 21 clamps and restricts the battery. This, combined with the hollow sleeve 22's restraint of the curved plates 15, ensures the battery is precisely positioned along the axis of the cylinder 27. When the hollow sleeve 22 closes the side of the battery, the first spring 20 cushions the convergence of the curved plates 15, ensuring the stability and accuracy of their movement.

[0102] In this embodiment of the invention, such as Figure 3 , Figure 5 and Figure 6 As shown, the hollow mounting base 6 may include a hollow base body and a ring. Specifically, the ring is disposed on the top of the hollow base body and is bolted to the hollow base body. A guide groove 19 is formed on the top of the ring, and a baffle 17 is disposed on the outer side wall of the ring.

[0103] In this embodiment of the invention, such as Figure 3 As shown, the guide seat 21 may include a T-shaped plate. Specifically, the vertical section of the T-shaped plate is located inside the guide groove 19, and the horizontal section of the T-shaped plate is located at the top of the annulus.

[0104] In this embodiment of the invention, such as Figure 3 , Figure 5 and Figure 6 As shown, the hollow mounting base 6 may also include a first annular plate 16. Specifically, the first annular plate 16 may include multiple movable slots.

[0105] The first ring plate 16 is located at the top of the ring and is bolted to the ring. The bottom of the first ring plate 16 has a movable groove that moves in conjunction with the horizontal section of the T-shaped plate.

[0106] The first ring plate 16 can limit the movement direction of the guide seat 21 and the arc plate 15, and protect the arc plate 21.

[0107] In this embodiment of the invention, such as Figure 5 , Figure 6 and Figure 12 As shown, the locking assembly may further include a drive plate 24, a first inclined surface 25, a second wedge surface 26, and a locking cylinder 13. Specifically, the drive plate 24 may include an opening 23.

[0108] A drive plate 24 is disposed inside the hollow mounting base 6, and an opening 23 is provided on the drive plate 24. The column 27 is located inside the opening 23. A first wedge surface 25 is disposed on the top of the drive plate 24, and a second wedge surface 26 is disposed on the bottom of the hollow sleeve 22. The first wedge surface 25 and the second wedge surface 26 are fitted together and cooperate with each other. A locking cylinder 13 is disposed outside the hollow mounting base 6 and is located at the high end of the first wedge surface 25. The output end of the locking cylinder 13 passes through the hollow mounting base 6 and is connected to the drive plate 24.

[0109] When the hollow sleeve 22 needs to be raised, the locking cylinder 13 is activated, pushing the drive plate 24 to move along the lower end of the first wedge surface 25. During this movement, the contact area between the second wedge surface 26 and the first wedge surface 25 gradually increases, thereby causing the hollow sleeve 22 to rise gradually. As the hollow sleeve 22 rises, it causes multiple arc-shaped plates 15 to gradually converge, thus achieving the purpose of tightening and fixing the sides of the cylindrical battery. The combination of the first wedge surface 25 and the second inclined surface 26 allows for a gradual and stable rise of the hollow sleeve 22, while also providing a simple drive structure that is easy to operate and control.

[0110] In this embodiment of the invention, the specific number of arc-shaped plates 15 can be various forms known to those skilled in the art, such as two or three. However, in a preferred example of the invention, considering the accuracy and stability of the arc-shaped plates 15 in clamping the cylindrical battery, the number of arc-shaped plates 15 can include three. Furthermore, the three arc-shaped plates 15 have a self-aligning function, which can further improve the sealing accuracy of the cylindrical battery.

[0111] In this embodiment of the invention, such as Figure 1 and Figure 7 As shown, the automatic sealing mechanism may also include a first guide rail 7 and a first sliding module 5.

[0112] The first guide rail 7 is disposed at the bottom of the base plate 14 and is slidably connected to the base plate 14. The first sliding module 5 is disposed on the side of the base plate 14 and is connected to the base plate 14, and is used to drive the base plate 14 to move along the extension direction of the first guide rail 7.

[0113] When sealing a cylindrical battery, the battery to be sealed is placed inside the hollow mounting base 6. Then, the first sliding module 5 is activated, moving the hollow mounting base 6 directly below the pressure head assembly, which then seals the battery. After the battery is sealed, the first sliding module 5 is activated again, moving the hollow mounting base 6 out of direct contact with the pressure head assembly to facilitate subsequent sealing operations of other cylindrical batteries.

[0114] In this embodiment of the present invention, the specific structure of the first sliding module 5 can be in various forms known to those skilled in the art, such as including but not limited to the method of directly driving the base plate 14 to move with a cylinder, or the method of driving the ball screw to rotate with a servo motor to move the base plate 14.

[0115] In this embodiment of the invention, such as Figure 1 , Figure 2 and Figure 10 As shown, the pressure head assembly may include a worktable 4, multiple sealing pressure heads 37, multiple hollow columns 36, multiple pressing columns 24, multiple reset components, and a drive component.

[0116] Multiple sealing heads 37 are positioned below the worktable 4 and above the hollow mounting base 6, distributed along the extension direction of the first guide rail 7. Multiple hollow columns 36 are fixedly inserted through the worktable 4, and multiple pressing columns 34 are respectively disposed inside the hollow columns 26, with the bottom of each pressing column 34 connected to its corresponding sealing head 37. Multiple reset components are located at the top of the worktable 4 and connected to the top of the corresponding pressing block 34, used to drive the corresponding pressing block 34 to reset. A drive component is located above the pressing block 34, used to drive the pressing column 34 to push the corresponding sealing head 37 downwards.

[0117] When the hollow mounting base 6 moves directly below the sealing head 37, the drive assembly activates and pushes the corresponding pressing post 34 and sealing head 37 downwards to seal the cylindrical battery. After sealing, the reset assembly resets the pressing post 34 and sealing head 37, awaiting the next sealing operation. Using multiple sealing heads 37 allows for gradual sealing of the cylindrical battery, improving the sealing quality. Furthermore, during multiple sealing operations with the multiple sealing heads 37, the side deformation and closing of the cylindrical battery are also gradual, further improving the sealing quality.

[0118] In this embodiment of the invention, the specific number of sealing heads 37 can be of various forms known to those skilled in the art, such as two or three. However, in a preferred example of the invention, considering the effectiveness and reliability of sealing the cylindrical battery, the specific number of sealing heads 37 can be as follows: Figure 7 As shown. Specifically, in Figure 7 In this context, the sealing head 37 of the pier may include three.

[0119] In this embodiment of the invention, such as Figure 10 As shown, the hollow column 36 may include a hollow cylinder and a second ring plate.

[0120] The hollow cylinder moves through the workbench 4, and the second ring plate is located on the top of the workbench 4 and connected to the top of the hollow cylinder. The second ring plate is bolted to the workbench 4 for easy disassembly, replacement, and maintenance.

[0121] In this embodiment of the invention, such as Figure 11 and Figure 13 As shown, the pressure head assembly may also include a groove, annular groove 41, cover groove 42, multiple plunger holes 38, and multiple plunger springs.

[0122] The bottom of the pressing post 34 has a groove, and the top of the sealing head 37 is located inside the groove. The bottom of the sealing head 37 has a cover groove 42 for engaging with the cap of the cylindrical battery to seal it. An annular groove 41 is formed on the side wall of the sealing head 37, and multiple plunger holes 38 are cylindrically formed on the side wall of the pressing post 34, with one end of each plunger hole 38 communicating with the annular groove 41. Multiple plunger springs are respectively disposed inside the multiple plunger holes 38 and the annular groove 41 to fix the sealing head 37. By using the plunger holes 38 and plunger springs to limit and fix the sealing head 37, it is easy to disassemble and replace the sealing head 37, thus meeting the sealing requirements of different types of cylindrical batteries and having wider versatility.

[0123] In this embodiment of the invention, such as Figure 10 , Figure 11 and Figure 14 As shown, the reset assembly may include a reset plate 33, a guide hole 40, a guide rod 39, and a second spring 35.

[0124] The reset plate 33 is fixedly sleeved on the side wall of the pressing column 34. The guide hole 40 is opened on the worktable 4. One end of the guide rod 39 is connected to the bottom of the reset plate 33, and the other end of the guide rod 39 extends into the interior of the guide hole 40. The second spring 35 is sleeved on the outside of the guide rod 39. One end of the second spring 35 is connected to the bottom of the reset plate 33, and the other end of the second spring 35 is connected to the top of the worktable 4.

[0125] When the driving assembly presses down on the pressing column 34, it moves the reset plate 33 synchronously. The reset plate 33 then moves the guide rod 39 along the guide hole 40 and compresses the second spring 35. When the driving assembly resets, the pressing column 34 is released from its restraint, and the second spring 35 drives the reset plate 33 and the pressing column 34 to reset. By using the guide rod 39 and the guide hole 40 in conjunction, the movement direction of the pressing column 34 can be limited, ensuring that the pressing column 34 can drive the corresponding sealing head 37 to accurately seal the cylindrical battery. In addition, the guide rod 39 can also limit the compression direction of the second spring 35 to ensure the smooth compression of the second spring 35, thereby driving the reset plate 33 to reset stably.

[0126] In this embodiment of the invention, the structure of the reset plate 33 can be of various forms known to those skilled in the art, such as a long plate, a circular plate, etc. However, in a preferred embodiment of the invention, considering the reset effect of the reset plate 33, the shape of the reset plate 33 can be as follows: Figure 10 As shown. Specifically, in Figure 10 In this configuration, the reset plate 33 may include a cross shape. Specifically, the number of guide rods 39, guide holes 40, and second springs 35 may include four sets, with the four sets of guide rods 39, guide holes 40, and second springs 35 located at the four ends of the cross shape, further improving the stability of the reset plate 33 in compressing the second springs 35 and in resetting.

[0127] In this embodiment of the invention, such as Figure 1 and Figure 7 As shown, the drive assembly may include a support frame 9, a second guide rail 10, a slide plate 2, an electric cylinder 1, and a second sliding module 3.

[0128] A support frame 9 is mounted on top of the workbench 4, and a second guide rail 10 is mounted on top of the support frame 9. A slide plate 2 is slidably connected to the second guide rail 10, and a pressing rod 12 is mounted above the pressing column 34. An electric cylinder 1 is mounted on top of the slide plate 2, and its output end passes through the slide plate 2 and connects to the top of the pressing rod 12. A second sliding module 3 is mounted on the side wall of the support frame 9 and connected to the slide plate 2, used to drive the slide plate 2 to move along the extension direction of the second guide rail 10.

[0129] When sealing the cylindrical battery inside the hollow mounting base 6, first locate the pressing post 34 directly opposite the hollow mounting base 6. Then, activate the second sliding module 3 to drive the sliding plate 2 and the electric cylinder 1 to slide along the second guide rail 10 until they are above the pressing post 34 directly opposite the hollow mounting base 6. Finally, activate the electric cylinder 1 and push the pressing post 34 through the pressing rod 12, thereby sealing the cylindrical battery. Similarly, the cylindrical battery can be sealed multiple times to improve the quality of the sealing.

[0130] In this embodiment of the invention, the number of support frames 9 and second guide rails 10 can be various forms known to those skilled in the art, such as one, two, etc. However, in this embodiment of the invention, considering the stability and reliability of the movement of the electric cylinder 1, the number of support frames 9 and second guide rails 10 can be as follows: Figure 7 As shown. Specifically, in Figure 7 In this configuration, the support frame 9 and the second guide rail 10 comprise two components. The two support frames 9 are arranged in parallel, and the two second guide rails 10 are respectively disposed on the top of the two support frames 9. The slide plate 2 is slidably connected to the two second guide rails 10.

[0131] In this embodiment of the invention, considering the reliability of the pressing rod 12 pressing the top of the pressing post 34, the bottom of the pressing rod 12 is hemispherical.

[0132] In this embodiment of the invention, the electric cylinder 1 may further include a pressure sensor and a displacement sensor. Specifically, the pressure sensor and displacement sensor are disposed inside the electric cylinder 1 to monitor and control the distance the output end of the electric cylinder 7 moves and the pressure on the pressing column 34, thereby further improving the quality and accuracy of sealing the cylindrical battery.

[0133] In this embodiment of the present invention, the specific structure of the second sliding module 3 can be in various forms known to those skilled in the art, such as including but not limited to the method of directly driving the slide plate 2 to move with a cylinder, or the method of driving the ball screw to rotate with a servo motor to move the slide plate 2.

[0134] In this embodiment of the invention, such as Figure 7 and Figure 8 As shown, the drive assembly may further include multiple first limiting seats 30, first limiting cylinders 11, and first limiting plugs 32. Specifically, the first limiting seat 30 may include a first limiting hole 31.

[0135] The first limiting seat 30 has a first limiting hole 31, and multiple first limiting seats 30 are distributed correspondingly to multiple pressing rods 12. The first limiting cylinder 11 is disposed on the side wall of the slide plate 2, and the first limiting plug 32 is disposed at the output end of the first limiting cylinder 11. The first limiting plug 32 is used to cooperate with the first limiting hole 31 to limit the position of the slide plate 2.

[0136] When the electric cylinder 1 moves directly above the corresponding pressing post 34, the first limiting plug 32 moves directly above the corresponding first limiting seat 30. The first limiting cylinder 11 is activated and pushes the first limiting plug 32 downward until it enters the interior of the corresponding first limiting hole 31, thereby achieving precise positioning of the electric cylinder 1 and ensuring the stability of the electric cylinder 1 during operation.

[0137] In this embodiment of the invention, considering that the position where the electric cylinder 1 needs to work corresponds to the pressing column 34, the first limiting seat 30 may include three.

[0138] In this embodiment of the invention, such as Figure 8 As shown, the bottom of the first limiting plug 32 is provided with an arc surface. Specifically, when the first limiting plug 32 moves into the interior of the corresponding first limiting hole 31, the arc surface has a certain guiding effect, so that the first limiting plug 32 can completely enter the interior of the corresponding first limiting hole 31, and at the same time, the position of the electric cylinder 1 can be finely adjusted to achieve precise operation of the electric cylinder 1.

[0139] In this embodiment of the invention, such as Figure 7 and Figure 9 As shown, the automatic sealing mechanism may further include a second limiting seat 18, a plurality of second limiting cylinders 8, and a plurality of second limiting plugs 28. Specifically, the second limiting seat 18 may include a second limiting hole 29.

[0140] The second limiting seat 18 is located on the side of the base plate 14 away from the first sliding module 5, and the second limiting seat 18 has a second limiting hole 29. Multiple second limiting cylinders 8 are located at the bottom of the worktable 4 and are distributed correspondingly to multiple sealing heads 37. Multiple second limiting plugs 28 are respectively located at the output ends of the multiple second limiting cylinders 8, and the second limiting plugs 28 are used to cooperate with the second limiting holes 29 to limit the position of the base plate 14.

[0141] When the cylindrical battery moves directly below the corresponding sealing head 37, the corresponding second limiting cylinder 8 is activated and drives the corresponding second limiting plug 28 into the interior of the second limiting hole 29 to limit the position of the cylindrical battery, thereby further improving the sealing accuracy of the cylindrical battery.

[0142] In this embodiment of the invention, considering that the working position of the hollow mounting base 6 corresponds to the sealing head 37, the second limiting cylinder 8 and the second limiting plug 28 may include three.

[0143] In this embodiment of the invention, such as Figure 9 As shown, the bottom of the second limiting plug 28 is provided with an arc surface. Specifically, when the second limiting plug 28 moves into the interior of the second limiting hole 29, the arc surface has a certain guiding function, so that the second limiting plug 28 can completely enter the interior of the corresponding second limiting hole 29, and at the same time, it can also finely adjust the position of the hollow mounting base 6 to achieve precise operation of the hollow mounting base 6.

[0144] Through the above technical solution, the automatic sealing mechanism for cylindrical batteries provided by the present invention places the cylindrical battery inside the hollow sleeve 22, with the column 27 supporting the bottom of the cylindrical battery. The locking assembly is activated, driving the hollow sleeve 22 to rise. The hollow sleeve 22, through its first conical surface 43, engages with the second conical surfaces 44 of multiple arc-shaped plates 15, causing the multiple arc-shaped plates 15 to converge and lock the cylindrical battery, thus confining the cylindrical battery to a position coaxial with the column 27. The pressure head assembly is activated to seal the cylindrical battery within the multiple arc-shaped plates 15. By using the first conical surface 43 of the hollow sleeve 22 and the second conical surfaces 44 of the multiple arc-shaped plates 15 to lock the cylindrical battery, precise positioning of the cylindrical battery can be achieved, thereby effectively improving the sealing accuracy of the cylindrical battery, reducing the defect rate of the sealed cylindrical battery, and lowering production costs.

[0145] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention. Furthermore, it should be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0146] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. An automatic sealing mechanism for cylindrical batteries, characterized in that, include: Pier sealing base, the pier sealing base comprising: Column (27); A hollow sleeve (22) is fitted on the outside of the column (27), and a first conical surface (43) is provided on the upper inner wall of the hollow sleeve (22). Multiple arc-shaped plates (15) are disposed above the hollow sleeve (22), and the multiple arc-shaped plates (15) are coaxial. The bottom of the multiple arc-shaped plates (15) extends into the interior of the hollow sleeve (22) and is sleeved on the top outer side of the column (27). The outer side wall of the multiple arc-shaped plates (15) is provided with a second conical surface (44) that cooperates with the first conical surface (43). A locking assembly is used to drive the hollow sleeve (22) to rise in order to lock the cylindrical battery; The pressure head assembly is disposed above the sealing base and is used to cooperate with the plurality of the arc plates (15) to seal the cylindrical battery.

2. The automatic pier sealing mechanism according to claim 1, characterized in that, The locking assembly includes: The base plate (14) has the column (27) positioned on top of it; A hollow mounting base (6) is disposed on the top of the base plate (14) and sleeved on the outside of the column (27) and the plurality of arc plates (15); Multiple guide grooves (19) are circumferentially formed on the top of the hollow mounting base (6); Multiple baffles (17) are circumferentially arranged on the side wall of the hollow mounting base (6); Multiple guide seats (21) are respectively disposed inside multiple guide grooves (19), and one end of the guide seat (21) is fixedly connected to the outer wall of the corresponding arc plate (15); Multiple first springs (20) have one end connected to the other end of the corresponding guide seat (21) and the other end connected to the corresponding baffle (17).

3. The automatic pier sealing mechanism according to claim 2, characterized in that, The locking assembly further includes: A drive plate (24) is disposed inside the hollow mounting base (6), and an opening (23) is provided on the drive plate (24), and the column (27) is located inside the opening (23); The first wedge surface (25) is disposed on the top of the drive plate (24); The second wedge surface (26) is disposed at the bottom of the hollow sleeve (22), and the first wedge surface (25) and the second wedge surface (26) are fitted together and cooperate with each other; A locking cylinder (13) is disposed outside the hollow mounting base (6) and located at the high end of the first wedge surface (25). The output end of the locking cylinder (13) passes through the hollow mounting base (6) and is connected to the drive plate (24).

4. The automatic pier sealing mechanism according to claim 1, characterized in that, The arc-shaped plate (15) comprises three.

5. The automatic pier sealing mechanism according to claim 2, characterized in that, The automatic pier sealing mechanism also includes: The first guide rail (7) is located at the bottom of the base plate (14) and is slidably connected to the base plate (14); The first sliding module (5) is disposed on the side of the base plate (14) and connected to the base plate (14) for driving the base plate (14) to move along the extension direction of the first guide rail (7).

6. The automatic pier sealing mechanism according to claim 5, characterized in that, The pressure head assembly includes: Workbench (4); Multiple sealing heads (37) are arranged below the workbench (4) and above the hollow mounting base (6), distributed along the extension direction of the first guide rail (7); Multiple hollow columns (36) are fixedly inserted through the worktable (4); Multiple pressing columns (34) are respectively disposed inside multiple hollow columns (36), and the bottom of the pressing column (34) is connected to the corresponding sealing head (37); Multiple reset components are disposed on the top of the worktable (4) and connected to the top of the corresponding pressing column (34) for driving the corresponding pressing column (34) to reset; A drive assembly is disposed above the pressing column (34) for driving the pressing column (34) to push the corresponding sealing head (37) downward.

7. The automatic pier sealing mechanism according to claim 6, characterized in that, The reset component includes: The reset plate (33) is fixedly sleeved on the side wall of the pressing column (34); A guide hole (40) is formed on the worktable (4); The guide rod (39) is connected at one end to the bottom of the reset plate (33) and at the other end extends into the interior of the guide hole (40); The second spring (35) is sleeved on the outside of the guide rod (39). One end of the second spring (35) is connected to the bottom of the reset plate (33), and the other end of the second spring (35) is connected to the top of the worktable (4).

8. The automatic pier sealing mechanism according to claim 6, characterized in that, The driving component includes: A support frame (9) is provided on top of the workbench (4); The second guide rail (10) is disposed on the top of the support frame (9); The slide plate (2) is slidably connected to the second guide rail (10); The pressing lever (12) is positioned above the pressing column (34); An electric cylinder (1) is disposed on the top of the slide plate (2), and the output end of the electric cylinder (1) passes through the slide plate (2) and is connected to the top of the pressing column (34); The second sliding module (3) is disposed on the side wall of the support frame (9) and connected to the slide plate (2) for driving the slide plate (2) to move along the extension direction of the second guide rail (10).

9. The automatic pier sealing mechanism according to claim 8, characterized in that, The driving component also includes: Multiple first limiting seats (30) are provided, and first limiting holes (31) are provided on the first limiting seats (30). The multiple first limiting seats (30) are distributed correspondingly to the multiple pressing rods (12). The first limiting cylinder (11) is disposed on the side wall of the slide plate (2); The first limiting plug (32) is disposed at the output end of the first limiting cylinder (11). The first limiting plug (32) is used to cooperate with the first limiting hole (31) to limit the position of the slide plate (2).

10. The automatic pier sealing mechanism according to claim 6, characterized in that, The automatic pier sealing mechanism also includes: The second limiting seat (18) is located on the side of the base plate (14) away from the first sliding module (5), and a second limiting hole (29) is opened on the second limiting seat (18). Multiple second limit cylinders (8) are disposed at the bottom of the worktable (4) and are distributed correspondingly to multiple sealing heads (37); Multiple second limit plugs (28) are respectively disposed at the output ends of multiple second limit cylinders (8), and the second limit plugs (28) are used to cooperate with the second limit hole (29) to limit the position of the base plate (14).

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