Apparatus and method for manufacturing cylindrical secondary battery cells

Abstract

Disclosed is an apparatus and method for manufacturing a cylindrical secondary battery cell. An apparatus for manufacturing a cylindrical secondary battery cell according to one embodiment of the present invention is an apparatus for manufacturing such a cylindrical secondary battery cell, the cylindrical secondary battery cell comprising: a battery can, an electrode assembly and an electrolyte are contained in the battery can; a cover plate, the cover plate is connected to the battery can; and a gasket, the gasket is located between the battery can and the cover plate. The apparatus for manufacturing a cylindrical secondary battery cell comprises: a supporting member, the cylindrical secondary battery cell is introduced into the supporting member so that the end of the battery can and the end of the gasket are arranged to face a preset direction, and the cover plate is arranged to contact the gasket; at least one fixing member, the at least one fixing member is used to fix the cylindrical secondary battery cell moved to a preset position by the supporting member; and a forming member, the forming member is located above the cylindrical secondary battery cell fixed by the fixing member and forms a curling portion by pressing the end of the battery can while rotating.

Description

Technical Field

[0001] This application claims priority to Korean Patent Application No. 10-2021-0005503 filed in Korea on January 14, 2021 and Korean Patent Application No. 10-2021-0158065 filed in Korea on November 16, 2021, respectively, the disclosures of which are incorporated herein by reference.

[0002] The present disclosure relates to a cylindrical secondary battery cell manufacturing apparatus and method, and more particularly, to a cylindrical secondary battery cell manufacturing apparatus and method that easily forms a crimping portion. Background Art

[0003] As the development and demand for mobile devices increase, the demand for secondary batteries as energy sources is rapidly increasing. Nickel-cadmium batteries or hydrogen-ion batteries have been used as conventional secondary batteries, but recently, lithium secondary batteries have been widely used because they have almost no memory effect compared to nickel-based secondary batteries, can be charged and discharged freely, have a very high self-discharge rate, and have a high energy density.

[0004] Lithium secondary batteries mainly use lithium oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively. Lithium secondary batteries include: an electrode assembly, in which a positive electrode plate and a negative electrode plate coated with positive electrode active materials and negative electrode active materials are respectively provided, and a separator is located between the positive electrode plate and the negative electrode plate; and a housing, in which the electrode assembly is sealed and contained together with an electrolyte solution (i.e., a battery housing).

[0005] Lithium secondary batteries include a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, and an electrolyte solution, and are classified into lithium ion batteries (LIBs), polymer lithium ion batteries (PLIBs), etc. according to the positive electrode active material and the negative electrode active material used. Generally, the electrodes of lithium secondary batteries are formed by coating the positive electrode or negative electrode active material onto a current collector (such as an aluminum or copper sheet, mesh, film, or foil) and then drying it.

[0006] Generally, secondary batteries may be classified into cylindrical, prismatic, or pouch-shaped secondary batteries according to the shape of a case accommodating secondary battery cells, and the cylindrical secondary batteries may be used as secondary battery modules by connecting a plurality of secondary battery cells in series or in parallel.

[0007] Referring to Korean Patent Application Publication No. 10-2018-0072990 as a prior art document, the main curling mold 240 moves downward to apply main pressure, and the auxiliary curling mold 250 applies auxiliary pressure to the open upper end portion 211 of the inclined metal can formed therein to form the curling portion 201.

[0008] However, as the size and thickness of the cylindrical secondary battery cell increase, when a curling portion is formed by a related art curling mold disclosed in a prior art document, a load applied to the curling mold increases, and a molding error also increases. Summary of the invention

[0009] Technical issues

[0010] The present disclosure is designed to solve the problems of the related art, and thus the present disclosure aims to provide a cylindrical secondary battery cell manufacturing apparatus and method for accurately forming a beading portion without error even when the size and thickness of the cylindrical secondary battery cell increase.

[0011] Technical Solution

[0012] According to one aspect of the present disclosure, a device for manufacturing a cylindrical secondary battery cell, the cylindrical secondary battery cell comprising a battery can containing an electrode assembly and an electrolyte solution, a cover plate connected to the battery can, and a gasket located between the battery can and the cover plate, the device comprising: a supporting member, into which the cylindrical secondary battery cell is inserted when an end of the battery can and an end of the gasket are arranged to face a preset direction and the cover plate contacts the gasket; at least one fixing member, the at least one fixing member being configured to fix the cylindrical secondary battery cell moved to a preset position by the supporting member; and a forming member, the forming member being located above the cylindrical secondary battery cell fixed by the fixing member, and rotating and pressing the end of the battery can to form a curling portion.

[0013] The gasket may be located inside and contacting the battery can, and the cap plate may be located inside and contacting the gasket, wherein the forming member presses an outer side of the battery can.

[0014] The supporting part may include: a receiving portion into which the cylindrical secondary battery cell is inserted; and a first moving portion configured to move the cylindrical secondary battery toward the fixing member.

[0015] An inner groove may be formed along a circumference of the battery can below the gasket, wherein the fixing member is inserted into the inner groove to fix the cylindrical secondary battery cell.

[0016] The fixing member may include a fixing protrusion formed to be inserted into the inner groove; and a second moving part coupled to the fixing protrusion to move the fixing protrusion.

[0017] The forming member may include: a supporting bracket, which contacts the cover plate; a rotating plate, which is rotatably connected to the supporting bracket and rotates around the supporting bracket; and a forming roller, which is connected to the rotating plate, rotates together with the rotating plate, and presses the end of the battery can to form the curling portion.

[0018] A pair of forming rollers are disposed around the support bracket and are coupled to the rotating plate at locations spaced apart from a center of the rotating plate.

[0019] The forming roller may include: a connecting rod coupled to the rotating plate; and a pressing rod coupled to the connecting rod, located around the supporting bracket, and pressing an end of the battery can.

[0020] The pressing lever may include a rotation shaft coupled to the connection lever, and a roller member coupled to the rotation shaft.

[0021] The inclined portion may be formed on a portion of the roller member that contacts the end of the battery can.

[0022] The forming member may be formed of a metal material.

[0023] According to another aspect of the present disclosure, a method for manufacturing a cylindrical secondary battery cell, the cylindrical secondary battery cell comprising a battery can containing an electrode assembly and an electrolyte solution, a cover plate connected to the upper side of the battery can, and a gasket located between the battery can and the cover plate, the method comprising the following steps: inserting the cylindrical secondary battery cell into a supporting member in a state where an end of the battery can and an end of the gasket are arranged to face a preset direction and the cover plate contacts the gasket; fixing the cylindrical secondary battery cell moved to a preset position by the supporting member by a fixing member; and forming a curling portion by positioning a forming member above the cylindrical secondary battery cell fixed by the fixing member and rotating and pressing the end of the battery can.

[0024] The shaping by pressing the end portion of the battery can may include coupling a shaping roller to a rotating plate and rotating together with the rotating plate to press the end portion of the battery can.

[0025] Beneficial Effects

[0026] According to an embodiment of the present disclosure, even when the size and thickness of a cylindrical secondary battery cell are increased, a beading portion may be accurately formed without error. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1is a diagram showing a cylindrical secondary battery cell of an embodiment before being formed by a cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure.

[0028] Figure 2 is a diagram showing a cylindrical secondary battery cell of another embodiment before being formed by the cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure.

[0029] Figure 3 is a diagram showing a state in which a cylindrical secondary battery cell is inserted into a supporting member in a cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure.

[0030] Figure 4 It is shown Figure 3 FIG. 1 is a diagram of a state in which a supporting member is lifted and a forming member is partially lowered.

[0031] Figure 5 It is shown Figure 4 A diagram of a state in which a fixing member is used to fix a cylindrical secondary battery cell.

[0032] Figure 6 It is shown Figure 5 FIG. 1 is a diagram of a state in which a forming member is completely lowered to rotate and press an end portion of a bottom can of a cylindrical secondary battery cell to form a curling portion.

[0033] Figure 7 It is shown Figure 6 A diagram showing a state in which the forming of the curling portion of a cylindrical secondary battery cell is completed and then the formed member is partially lifted.

[0034] Figure 8 It is shown Figure 7 FIG. 4 is a diagram showing a state in which the forming member is completely lifted, the fixing member is separated from the cylindrical secondary battery cell, and the supporting member is lowered.

[0035] Fig. 9 2 is a diagram showing a cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure. Figure 1 A diagram of the state of a cylindrical secondary battery cell.

[0036] Fig.10 2 is a diagram showing a cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure. Figure 2 A diagram of the state of a cylindrical secondary battery cell. DETAILED DESCRIPTION

[0037] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to the general and dictionary meanings, but are interpreted based on the meanings and concepts corresponding to the technical aspects of the present disclosure based on the principle that the inventor is allowed to appropriately define the terms for the best interpretation. Therefore, the descriptions presented here are only preferred examples for illustrative purposes and are not intended to limit the scope of the present disclosure, so it should be understood that other equivalents and modifications may be made thereto without departing from the scope of the present disclosure.

[0038] For the convenience and clarity of explanation, the size of each element or a specific part of an element shown in the drawings may be exaggerated, omitted or schematically drawn. Therefore, the size of each element does not substantially reflect its actual size. While describing the present disclosure, detailed descriptions of related known functions or configurations that may obscure the main points of the present disclosure are omitted.

[0039] Furthermore, in the present specification, it should be understood that when elements are “connected” or “coupled” to each other, the elements may be directly connected or coupled to each other or may be indirectly connected or coupled to each other through an intervening element therebetween.

[0040] Figure 1 is a diagram showing a cylindrical secondary battery cell of an embodiment before being formed by a cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure. Figure 2 is a diagram showing a cylindrical secondary battery cell of another embodiment before being formed by the cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure. Figure 3 is a diagram showing a state in which a cylindrical secondary battery cell is inserted into a supporting member in a cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure. Figure 4 It is shown Figure 3 FIG. 1 is a diagram of a state in which a supporting member is lifted and a forming member is partially lowered. Figure 5 It is shown Figure 4 A diagram of a state in which a fixing member is used to fix a cylindrical secondary battery cell. Figure 6 It is shown Figure 5 FIG. 1 is a diagram of a state in which a forming member is completely lowered to rotate and press an end portion of a bottom can of a cylindrical secondary battery cell to form a curling portion. Figure 7 It is shown Figure 6 A diagram showing a state in which the forming of the curling portion of a cylindrical secondary battery cell is completed and then the formed member is partially lifted. Figure 8 It is shown Figure 7 FIG. 4 is a diagram showing a state in which the forming member is completely lifted, the fixing member is separated from the cylindrical secondary battery cell, and the supporting member is lowered. Fig. 9 2 is a diagram showing a cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure. Figure 1 A diagram of the state of a cylindrical secondary battery cell. Fig.10 2 is a diagram showing a cylindrical secondary battery cell manufacturing apparatus according to an embodiment of the present disclosure. Figure 2 A diagram of the state of a cylindrical secondary battery cell.

[0041] Reference Figure 1 and 9 , the cylindrical secondary battery cell 400 includes a battery can 410 accommodating an electrode assembly and an electrolyte solution, a cap plate 420 coupled to the battery can 410 , and a gasket 430 located between the battery can 410 and the cap plate 420 .

[0042] When the gasket 430 is located between the battery can 410 and the cover plate 420, Figure 1 As shown, the end of the battery can 410 and the end of the gasket 430 can be bent together to form a Fig. 9 The curling portion 440 is shown, and thus, the cylindrical secondary battery cell 400 can be sealed.

[0043] Reference Figure 1 , an inner groove 411 is formed along the circumference of the battery can 410 of the cylindrical secondary battery cell 400 below the gasket 430 .

[0044] Figure 2 and Fig.10 The cylindrical secondary battery cell 400 is Figure 1 and Fig. 9 A modified embodiment of a cylindrical secondary battery cell 400. Figure 2 and Fig.10 , the positive terminal 450 is formed to be opposite to the curling portion 440 .

[0045] Reference Figure 2 and Fig.10 , the positive terminal 450 may include a terminal insertion portion 451. The terminal insertion portion 451 may be inserted into the battery can 410 through a through hole formed in the closed portion 412 of the battery can 410, and the lower end portion may be electrically connected to the central portion of the current collecting plate 470. The electrical connection may be formed by welding. Examples of welding may include laser welding, ultrasonic welding, and resistance welding.

[0046] The terminal insertion portion 451 may be coupled to the current collecting plate 470 by simultaneously passing through the battery can 410 and the insulator 480. When a lower edge portion of the terminal insertion portion 451 is pressed by a caulking jig, the positive terminal 450 may be riveted toward an inner surface of an upper end portion of the battery can 410 to be securely fixed to the through hole.

[0047] That is, due to the application of the compression jig, the lower peripheral end of the terminal insertion portion 451 can be bent toward the inner surface of the battery can 410. For this reason, the maximum width of the end of the terminal insertion portion 451 can be greater than the maximum width of the hole of the battery can 410 formed by the penetration of the terminal insertion portion 451.

[0048] The riveted structure of the positive terminal 450 may include a battery can 410 having a columnar shape with an open side, the positive terminal 450 riveted through a through hole formed in the bottom of the battery can 410 , and a rivet gasket 460 between the positive terminal 450 and the through hole.

[0049] The rivet gasket 460 may be formed of an insulating or elastic polymer resin. In one example, the rivet gasket 460 may be formed of polypropylene, polybutylene terephthalate, or polyvinyl fluoride, but is not limited thereto.

[0050] In another embodiment, the terminal insertion portion 451 may not be bent toward the inner surface of the battery can 410. For example, the terminal insertion portion 451 may have a substantially cylindrical shape passing through a hole formed at a substantially central portion of the top surface of the battery can 410.

[0051] The terminal insertion portion 451 may have, but is not limited to, a circular planar shape. The terminal insertion portion 451 may selectively have a polygonal shape, a star shape, or a shape having legs extending from the center.

[0052] The terminal insertion portion 451 of the positive terminal 450 may pass through the central hole of the insulator 480. The diameter of the central hole of the insulator 480 may be equal to or greater than the diameter of the terminal insertion portion 451. The terminal insertion portion 451 of the positive terminal 450 may pass through the central hole of the insulator 480 and may be electrically coupled to the current collecting plate 470.

[0053] The insulator 480 is located between the cell can 410 and the electrode assembly, or between the cell can 410 and the current collecting plate 470 above the electrode assembly.

[0054] A beading portion 440 and an inner groove 411 corresponding to the beading portion may be formed in the battery can 410. The inner groove 411 is formed by press-fitting the outer circumferential surface of the battery can 410 inwardly.

[0055] The inner groove 411 may support the electrode assembly so that the electrode assembly having a size substantially corresponding to the width of the battery can 410 is not separated from the battery can 410, and may also serve as a support on which the cover plate 420 is disposed. In addition, the inner groove 411 supports the outer peripheral surface of the gasket 430.

[0056] Reference Fig.10The beading portion 440 extends to the inside of the battery can 410 and is bent to surround and fix the edge of the cap plate 420 and the gasket 430. The beading portion 440 may be formed opposite to the positive terminal 450 with respect to the arrangement state of the battery can 410.

[0057] The lower current collecting plate 490 is connected to the lower portion of the electrode assembly. The lower current collecting plate 490 is formed of a conductive metal material such as aluminum, steel, copper, or nickel, and is electrically connected to the battery can 410. To this end, at least a portion of an edge portion of the lower current collecting plate 490 may be located and fixed between the inner surface of the battery can 410 and the gasket 430.

[0058] In one embodiment, at least a portion of the edge portion of the lower current collecting plate 490 may be welded to a portion of the inner groove 411 while being supported on a lower surface of the portion of the inner groove 411 formed in the battery can 410. In a modified embodiment, at least a portion of the edge portion of the lower current collecting plate 490 may be directly welded to the inner wall surface of the battery can 410.

[0059] In the cylindrical secondary battery cell manufacturing apparatus 10 according to an embodiment of the present disclosure, the end of the battery can 410 and the end of the gasket 430 are formed together to form a curling portion 440 so that Figure 1 Cylindrical secondary battery cell 400 or Figure 2 The cylindrical secondary battery cell 400 is sealed.

[0060] Referring to the drawings, a cylindrical secondary battery cell manufacturing apparatus 10 according to an embodiment of the present disclosure includes a support member 100, a fixing member 200, and a forming member 300. Figure 2 The cylindrical secondary battery cell 400 is inserted and formed in Figures 3 to 8 In, but Figure 1 The cylindrical secondary battery cell 400 may also be manufactured by the cylindrical secondary battery cell manufacturing apparatus 10 according to an embodiment of the present disclosure.

[0061] The cylindrical secondary battery cell 400 is inserted into the support member 100. Figure 2 As shown, the cylindrical secondary battery cell 400 is inserted into the support member 100 in a state where the end of the battery can 410 and the end of the gasket 430 may be arranged to face a preset direction (e.g., face upward) and the cap plate 420 contacts the gasket 430. The gasket 430 is located inside the battery can 410 and contacts the battery can 410, and the cap plate 420 is located inside the gasket 430 and contacts the gasket 430.

[0062] Before forming the beading portion 440 , the cylindrical secondary battery cell 400 is inserted into the support member 100 .

[0063] The support member 100 includes a receiving portion 110 and a first moving portion 120. An inner space is formed in the receiving portion 110, and the cylindrical secondary battery cell 400 is inserted into the inner space. The first moving portion 120 is provided to move the cylindrical secondary battery cell 400 toward the fixing member 200. Figure 3 and Figure 4 , for example, the first moving part 120 may upwardly move the cylindrical secondary battery cell 400. The first moving part 120 may include any of various motors or hydraulic pumps.

[0064] A pair of protrusions 121 may be formed on both ends of the first moving part 120 , and a preset space 122 may be formed between the pair of protrusions 121 . Figure 2 The positive terminal 450 of the cylindrical secondary battery cell 400 can be inserted into the space 122. In this way, when the positive terminal 450 is inserted into the space 122, interference between the positive terminal 450 and the first moving part 120 can be prevented, and because the positive terminal 450 is not pressed by the first moving part 120, damage to the positive terminal 450 can be prevented.

[0065] The fixing member 200 fixes the cylindrical secondary battery cell 400 moved to a preset position, for example, Figure 4 and 5 As shown, it is lifted by a support member 100.

[0066] The fixing member 200 is inserted into the inner groove 411 of the battery can 410 to fix the cylindrical secondary battery cell 400. One or more fixing members 200 may be provided, and for example, four fixing members 200 may be provided to press and fix four portions of the inner groove 411 of the battery can 410.

[0067] The fixing member 200 may include a fixing protrusion 210 and a second moving part 220. The fixing protrusion 210 is formed to be inserted into the inner groove 411 of the battery can 410, and is inserted into the groove 411 of the battery can 410 to fix the cylindrical secondary battery cell 400. The second moving part 220 is coupled to the fixing protrusion 210 to move the fixing protrusion 210. The second moving part 220 may include any of various motors or hydraulic pumps.

[0068] Reference Figure 6 The forming member 300 is located above the cylindrical secondary battery cell 400 fixed by the fixing member 200, and the forming member 300 rotates and presses the end of the battery can 400 to form a Fig.10 The curling portion 440 shown (the curling portion 440 is Fig. 9 and 10That is, when the forming member 300 rotates and presses the outer side of the battery can 410, the end of the battery can 410 and the end of the gasket 430 are bent together to form the curling portion 440.

[0069] The forming member 300 includes a support bracket 310 , a rotating plate 320 , and forming rollers 330 .

[0070] The support bracket 310 contacts the cover plate 420. Since the support bracket 310 serves as a central axis with respect to the rotating plate 320 and contacts the cover plate 420, the support bracket 310 is configured not to rotate in consideration of friction with the cover plate 420.

[0071] The rotating plate 320 is rotatably coupled to the supporting bracket 310 and rotates around the supporting bracket 310. A bearing may be coupled between the rotating plate 320 and the supporting bracket 310. There may be various methods of rotating the rotating plate 320 in a state where the supporting bracket 310 is fixed. For example, gear teeth (not shown) may be formed on the outer peripheral surface of the rotating plate 320, and a motor (not shown) that may be engaged with the gear teeth (not shown) may be provided so that the rotating plate 320 is rotated by the rotational force of the motor (not shown).

[0072] However, this is merely an example, and there may be more various methods of rotating the rotating plate 320 .

[0073] The forming roller 330 is coupled to the rotating plate 320 and rotates together with the rotating plate 320 , and presses the end of the battery can 410 to form the curling portion 440 .

[0074] Reference Figure 6 A pair of forming rollers 330 are disposed around the support bracket 310 and are coupled to the rotating plate 320 at a position spaced apart from the center of the rotating plate 320 .

[0075] Reference Figure 3 The forming roller 330 includes a connecting rod 331 and a pressing rod 332 .

[0076] The connection rod 331 is coupled to the rotating plate 320 at a position spaced apart from the center of the rotating plate 320. The connection rod 331 rotates as the rotating plate 320 rotates.

[0077] The pressing rod 332 is coupled to the connecting rod 331, is located around the support bracket 310, and presses the end of the battery can 410. That is, the pressing rod 332 rotates with the rotation of the connecting rod 331 to form the battery can 410 and the gasket 430, thereby forming the curling portion 440.

[0078] The pressing lever 332 may include a rotating shaft 335 and a roller member 336. The rotating shaft 335 is coupled to the connecting lever 331 and rotates. The roller member 336 is coupled to the rotating shaft 335 and rotates as the rotating shaft 335 rotates.

[0079] When the rotating plate 320 rotates around the supporting bracket 310, the roller member 336 may rotate together with the rotating plate 320. In this case, the roller member 336 Figure 3 Rotate in the horizontal direction.

[0080] The roller member 336 may rotate along with the rotation of the rotation shaft 335. Figure 3 Rotate in the vertical direction.

[0081] That is, the roller member 336 may be Figure 3 Rotate horizontally in the Figure 3 Rotate in the vertical direction.

[0082] Reference together Figure 3 and 6 , the inclined portion 337 may be formed on a portion of the roller member 336 that contacts the end of the battery can 410. The inclined portion 337 of the roller member 336 contacts the end of the battery can 410 to press the battery can 410. In this way, when the inclined portion 337 is formed on the roller member 336, the battery can 410 and the gasket 430 can be easily bent.

[0083] Since the forming member 300 needs rigidity to form the battery can 410 and the gasket 430, the forming member 300 may be formed of any of various metal materials. However, the material of the forming member 300 is not limited to the metal material.

[0084] The following description of the cylindrical secondary battery cell manufacturing method according to the embodiment of the present disclosure may also be applied to the cylindrical secondary battery cell manufacturing apparatus 10 according to the embodiment of the present disclosure.

[0085] The operation and effect of the cylindrical secondary battery cell manufacturing method according to the present disclosure will now be described with reference to the accompanying drawings. The same description made on the cylindrical secondary battery cell manufacturing apparatus 10 according to the embodiment of the present disclosure will be omitted.

[0086] Reference Figure 3 , in such Figure 2 The cylindrical secondary battery cell 400 is inserted into the support member 100 in a state where the ends of the battery can 410 and the gasket 430 are arranged to face a preset direction (eg, upward) and the cap plate 420 contacts the gasket 430 .

[0087] Reference Figure 4, the forming member 300 is lowered, and the supporting member 100 is lifted to a preset position, such as the position of the fixing member 200 .

[0088] Reference Figure 5 , the fixing member 200 moves from the outside of the cylindrical secondary battery cell 400 to the inside of the cylindrical secondary battery cell 400 and contacts the inner groove 411 of the battery can 410 to fix the cylindrical secondary battery cell 400 .

[0089] Reference Figure 6 , the forming member 300 is completely lowered and positioned on the cylindrical secondary battery cell 400 fixed by the fixing member 200. The support bracket 310 of the forming member 300 contacts the cover plate 420. The forming member 300 rotates and presses the end of the battery can 410 to form the curling portion 440. That is, the forming roller 330 is coupled to the rotating plate 320 and rotates together with the rotating plate 320 to press the end of the battery can 410, thereby forming Fig.10 The curled edge portion 440 is shown.

[0090] Reference Figure 7 , the forming of the curling portion 440 is completed, and the forming member 300 is lifted.

[0091] Reference Figure 8 , the forming member 300 and the fixing member 200 return to their original positions, and the support member 100 is also lowered to its original position. In this state, the cylindrical secondary battery cell 400 is pulled out from the support member 100.

[0092] Although the embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-mentioned specific embodiments. Various modified embodiments may be made by a person skilled in the art without departing from the scope of the present disclosure as claimed in the claims.

[0093] Industrial Applicability

[0094] The present disclosure relates to a cylindrical secondary battery cell manufacturing apparatus and method, and in particular, can be used in industries related to secondary batteries.

Claims

1. An apparatus for manufacturing a cylindrical secondary battery cell, the cylindrical secondary battery cell comprising a battery can containing an electrode assembly and an electrolyte solution, a cover plate coupled to the battery can, and a gasket located between the battery can and the cover plate, the apparatus comprising: a support member into which the cylindrical secondary battery cell is inserted in a state in which an end portion of the battery can and an end portion of the gasket are arranged to face a preset direction and the cover plate contacts the gasket; at least one fixing member configured to fix the cylindrical secondary battery cell moved to a preset position by the supporting member; as well as a forming member which is positioned above the cylindrical secondary battery cell fixed by the fixing member and rotates, and which presses an end of the battery can to form a curling portion, Wherein, the forming component comprises: a support bracket, the support bracket contacting the cover plate; a rotating plate rotatably coupled to the support bracket and rotating about the support bracket; and a forming roller coupled to the rotating plate and rotating together with the rotating plate to press the end of the battery can to form the curling portion, wherein a pair of forming rollers are disposed around the support bracket and coupled to the rotating plate at a position spaced from the center of the rotating plate, and The forming roller includes an inclined portion contacting the end of the battery can, and when the support bracket contacts the cover plate and the forming roller rotates around the support bracket, the inclined portion presses the end of the battery can to form the curling portion.

2. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 1, wherein: The gasket is located in the battery can and contacts the battery can, and the cover plate is located in the gasket and contacts the gasket, The forming member presses the outer side of the battery can.

3. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 1, wherein: The supporting member comprises: an accommodating portion into which the cylindrical secondary battery cell is inserted; and A first moving portion is configured to move the cylindrical secondary battery toward the fixing member.

4. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 3, wherein: A pair of protrusions are formed on both end portions of the first moving portion, and a preset space is formed between the pair of protrusions.

5. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 1, wherein: An inner groove is formed below the gasket along the periphery of the battery can, Wherein, the fixing member is inserted into the inner groove to fix the cylindrical secondary battery cell.

6. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 5, wherein: The fixing member comprises: a fixing protrusion formed to be inserted into the inner groove; and A second moving portion is coupled to the fixing protrusion to move the fixing protrusion.

7. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 1, wherein: An end portion of the battery can and an end portion of the gasket are bent together to form the beaded portion.

8. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 1, wherein: The forming roller comprises: a connecting rod coupled to the rotating plate; and A pressing rod, which is coupled to the connecting rod, is located around the supporting bracket and presses an end of the battery can.

9. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 8, wherein: The pressing rod comprises: a rotating shaft coupled to the connecting rod; and A roller member is coupled to the rotating shaft.

10. The apparatus for manufacturing a cylindrical secondary battery cell according to claim 9, wherein: The inclined portion is formed on a portion of the roller member that contacts an end portion of the battery can.

11. The apparatus for manufacturing a cylindrical secondary battery cell according to any one of claims 1 to 10, wherein: The formed member is formed of a metal material.

12. A method for manufacturing a cylindrical secondary battery cell, the cylindrical secondary battery cell comprising a battery can containing an electrode assembly and an electrolyte solution, a cover plate coupled to an upper side of the battery can, and a gasket between the battery can and the cover plate, the method comprising the following steps: inserting the cylindrical secondary battery cell into a supporting member in a state where an end portion of the battery can and an end portion of the gasket are arranged to face a preset direction and the cover plate contacts the gasket; Fixing the cylindrical secondary battery cell moved to a preset position by the supporting member by a fixing member; as well as forming a beaded portion by positioning a forming member over the cylindrical secondary battery cell fixed by the fixing member and rotating and pressing an end portion of the battery can, wherein forming the curling portion by pressing the end of the battery can comprises: coupling a forming roller to a rotating plate and rotating with the rotating plate to press the end of the battery can, The method further comprises the following steps: when the support bracket of the forming member contacts the cover plate and the forming roller rotates around the support bracket, the inclined portion of the forming roller presses the end of the battery can to form the curling portion.

13. The method for manufacturing a cylindrical secondary battery cell according to claim 12, further comprising the following steps: In a state where the molding member and the fixing member are returned to their original positions and the supporting member is lowered to its original position, the cylindrical secondary battery cell is pulled out from the supporting member.

14. The method for manufacturing a cylindrical secondary battery cell according to claim 12, wherein: An end portion of the battery can and an end portion of the gasket are bent together to form the beaded portion.

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