Beading device for cylindrical batteries equipped with a position measurement unit

Abstract

The present invention relates to a beading device for cylindrical batteries, including a beading knife that forms a beading portion on the side of a cylindrical can, a backup roller that supports the cylindrical can on the other side of the can when the beading knife forms the beading portion on the cylindrical can, individual beading units including upper and lower CFBs (hereinafter referred to as "CFBs") with bearing structures arranged at the top and bottom, respectively, and a cam structure in which one or more of the individual beading units are arranged in a circle and rotate the individual beading units around the center axis of the circle, the device also including a position measuring unit that measures the position of at least one of the beading knife, the backup roller, and the upper and lower CFBs. The present invention also provides a beading method for cylindrical batteries using the device, a cylindrical can beaded using the beading device for cylindrical batteries, a cylindrical battery including the can, and an electrical device and a transportation means including the can.

Description

[Technical Field]

[0001] The present invention relates to a beading device for cylindrical batteries equipped with a position measurement unit, and more particularly to a beading device for cylindrical batteries equipped with a position measurement unit capable of measuring the positions of a beading knife, a backup roller, an upper cam, and a lower cam used when forming a beading portion on a cylindrical battery, and a method for forming a beading portion on a cylindrical battery using the same. [Background technology]

[0002] A lithium secondary battery includes a positive electrode coated with a positive electrode active material, a negative electrode coated with a negative electrode active material, an electrode assembly having a separator laminated thereon between the positive electrode and the negative electrode to prevent short circuits and to allow lithium ions (Li-ions) to move, a battery case that houses the electrode assembly, and an electrolyte that is injected into the battery case to allow the lithium ions to move.

[0003] Lithium secondary batteries are classified into cylindrical batteries or prismatic batteries, which have an electrode assembly housed in a cylindrical or prismatic metal case, and pouch batteries, which have an electrode assembly housed in a pouch-shaped case made of aluminum laminate sheet, depending on the shape of the battery case. Cylindrical batteries have the advantages of being relatively large in capacity and structurally safe.

[0004] A cylindrical battery includes a cylindrical can, a jelly roll electrode assembly housed inside the cylindrical can, a cap assembly coupled to the top of the cylindrical can, a beading portion for attaching the cap assembly, and a crimping portion for sealing the cylindrical battery. The cylindrical battery is manufactured by inserting the jelly roll electrode assembly into the cylindrical can, forming a beading portion on the can corresponding to the outer periphery of the top end of the jelly roll electrode assembly, installing a cap assembly equipped with a gasket, and crimping the top end of the can to size it.

[0005] FIG. 1 is a top view of a beading device according to the prior art.

[0006] Referring to FIG. 1, the prior art beading device has ten individual beading units 100 arranged in a circle and a cam structure that rotates the individual beading units 100 around the circular central axis (the central axis of the cam structure) 245. The individual beading units 100 receive cylindrical cans in an upright position from the previous process, with jelly roll electrode assemblies inserted inside. The previous process may also be a device in which the individual units rotate around another circular central axis, similar to the prior art beading device. These two rotating devices mesh at one point like gears, and transport the completed cylindrical batteries from each device to the next process. The previous process is omitted from FIG. 1.

[0007] In a conventional beading device, ten individual beading units 100 receive cylindrical cans in an upright position from the previous process at specific positions, such as position A in Figure 1. Then, the individual beading units 100 rotate clockwise to secure the transferred cylindrical can, and the backup rollers and beading knives move vertically and horizontally to specific positions, where the beading knives perform the beading operation. The backup rollers and beading knives then return to their initial positions, transferring the beaded cylindrical can to the next process (position B), completing one cycle. All ten individual beading units 100 rotate around a circular central axis 245 to perform the same operation at specific positions.

[0008] FIG. 2 is a partial perspective view of the upper part of a beading device according to the prior art, and FIG. 3 is a partial perspective view of the lower part of a beading device according to the prior art.

[0009] 1 to 3, in the individual beading unit 100, two bearings, an upper CFB (Cam Follower Bearing) 110 and a lower CFB 120, rotate along the outer periphery of a lower cam plate 220 disposed on the top of a cylindrical cam support part 210 and an upper cam plate 230 disposed on the top of the entire beading device. The upper CFB 110 is located on the top of the individual beading unit 100, and the lower CFB 120 is located on the bottom of the individual beading unit 100.

[0010] The individual beading unit 100 is continuously rotated by the upper CFB 110 and the lower CFB 120, and the device inside the individual beading unit 100 moves up and down to perform the beading work on the cylindrical can. In other words, the rotational movement of the two CFBs 110 and 120 is converted into the linear movement of the device inside the individual beading unit 100, so a rotating device like a beading device in the prior art is usually called a cam device or cam structure.

[0011] The upper CFB 110 and the lower CFB 120 move at a constant height while closely adhering to the upper surface of the horizontally arranged lower cam plate 220 and the lower surface of the upper cam plate 230, respectively. If the upper surface of the lower cam plate 220 and the lower surface of the upper cam plate 230 are uneven or have foreign matter attached, the upper CFB 110 and the lower CFB 120 cannot rotate while maintaining a constant height. Furthermore, if an abnormality occurs in the bearings of the upper CFB 110 and the lower CFB 120, the upper CFB 110 and the lower CFB 120 cannot rotate while maintaining a constant height. If the upper CFB 110 and the lower CFB 120 cannot rotate while maintaining a constant height for various reasons, the cam movement will prevent the internal devices of the individual beading unit 100 from performing normal linear motion, which may ultimately result in poor beading.

[0012] Figure 4 is a cross-sectional view of an entire individual beading unit 100 of a beading device according to the prior art, and Figure 5 is a partial cross-sectional view of an individual beading unit 100 of a beading device according to the prior art. Since the individual beading unit 100 is simply illustrated in Figures 2 and 3, the individual beading unit 100 will be described with reference to the cross-sectional views of Figures 4 and 5. Meanwhile, Figures 4 and 5 omit other devices in order to describe only the parts related to the present invention.

[0013] The individual beading unit 100 includes a cylindrical can support 140 that supports a cylindrical can 130 with a cylindrical battery, essentially an unassembled cylindrical can with a jelly roll electrode assembly inserted inside, a beading knife 150 that forms a bead on the top of the cylindrical can 130, and a backup roller 160 that is positioned symmetrically to the beading knife 150 with respect to the center of the cylindrical can 130.

[0014] The beading process is a process in which the side of the cylindrical can 130 is forcibly pressed inward and deformed using a circular beading knife 150. The lower part of the cylindrical can 130 is supported by the cylindrical can support part 140, and the rotating rollers 145 of the cylindrical can support part 140 rotate the cylindrical can 130. The beading knife 150 maintains a constant height and depth, forming a beading portion on the entire side of the rotating cylindrical can 130. Here, the depth refers to the length that the beading knife 150 bites into the side of the cylindrical can 130 during the beading process.

[0015] For example, even though the cylindrical can 130 is rotating, the beading knife 150 applies force only from one side, which may cause deformation of the cylindrical can 130. The cylindrical can support part 140 supports only the lower part of the cylindrical can 130. The cylindrical can guide 170 merely guides the upper part of the cylindrical can 130 and does not actually hold the cylindrical can 130 with strong force. The cylindrical can guide 170 is equipped with a suction part 175 that sucks in metal powder generated during the beading operation, so it cannot hold the cylindrical can 130 with strong force.

[0016] To prevent deformation of the cylindrical can 130 that may occur during the beading operation, a backup roller 160 is provided at a position symmetrical to the beading knife 150 with respect to the center of the cylindrical can 130. When the beading knife 150 contacts the cylindrical can 130 to form a beading portion, the backup roller 160 also contacts the cylindrical can 130 to support the cylindrical can 130.

[0017] As described above, the individual beading unit 100 rotates clockwise to fix the transferred cylindrical can 130, and the backup roller 150 and beading knife 160 move vertically and horizontally at a specific position, the beading knife 150 performs the beading operation, and then the backup roller 160 and beading knife 150 return to their initial positions, transferring the cylindrical can 130 for which the beading operation has been completed to the next process, thereby completing one cycle.

[0018] The newly transferred cylindrical cans are fixed upright on the cylindrical can support 140. The cylindrical can support 140 is connected to the lower CFB 120, which rotates at a fixed height, and therefore also rotates at a fixed height. The rotational movement here refers to the rotational movement along the outer periphery of the lower cam plate 220.

[0019] As the individual beading unit 100 rotates clockwise, the beading knife 150 and backup roller 160 descend and approach the cylindrical can 130. When the beading operation is completed, the beading knife 150 and backup roller 160 ascend while moving away from the cylindrical can 130. In terms of relative coordinates centered on the cylindrical can 130, the beading knife 150 and backup roller 160 move up and down in the y-axis direction and move towards or away from the cylindrical can 130 in the x-axis direction. The cylindrical can guide 170 moves up and down in the y-axis direction.

[0020] Typically, the beading portion provided on the cylindrical can 130 has a depth of 2 mm to 2.5 mm, and the beading operation is performed in a very short time. The beading knife 150 and the backup roller 160 move in the x-axis and y-axis directions in conjunction with the rotational movement of the upper CFB 110 due to cam movement. The specific means for linking the beading knife 150, backup roller 160, cylindrical can support portion 140, and cylindrical can guide 170 can be changed by cam movement, but this can be easily designed and changed by an ordinary engineer. Since these configurations are not essential to the present invention, detailed description thereof will be omitted.

[0021] The individual beading units 100 of the beading apparatus according to the prior art have the following problems.

[0022] 1) The upper CFB 110 and the lower CFB 120 must rotate while maintaining a constant height; otherwise, the positions of the cylindrical can support 140, beading knife 150, and backup roller 160 may be changed due to cam movement.

[0023] 2) Even if the cam movement operates normally, if the positions of the beading knife 150 and the backup roller 160 arranged inside the individual beading unit 100 are not normal, poor beading occurs.

[0024] The positions of the beading knife 150 and the backup roller 160 are most important for successfully performing the beading operation on the cylindrical can 130. The height from the bottom of the cylindrical can 130 (position in the y-axis direction) and the distance from the central axis of the cylindrical can 130 (position in the x-axis direction) are very important.

[0025] In conventional beading devices, the positions of the upper CFB 110, the lower CFB 120, the beading knife 150, and the backup roller 160, which are the most important factors that can cause beading defects, are not measured separately, and the operation is performed using a mechanical configuration or is manually observed by an operator on a regular or irregular basis.

[0026] The beading process is performed very quickly, resulting in a very large number of cylindrical cans 130. Although real-time observation of the most important factors that can cause beading defects is a very important factor in reducing beading defects, the prior art has overlooked this point.

[0027] Furthermore, because ten individual beading units 100 of the same type are operated simultaneously, the operation of any one or more units can cause continuous and repetitive failures, and with the current configuration, it is very difficult to identify the specific unit that is malfunctioning. For these reasons, many failures occur during actual beading work.

[0028] Patent documents 1 to 3, 5, and 6 all disclose jigs for fixing cylindrical batteries, and beading knives or backup rollers for beading processing. However, they appear to have failed to recognize the problem of defects caused by the positions of the CFB, beading knife, and backup roller, and therefore do not disclose sensors for measuring the positions of the CFB, beading knife, and backup roller.

[0029] Patent Document 4 relates to a technology for preventing horizontal deviation during the beading process, but does not recognize the problem of the position of the beading knife in the x-axis and y-axis directions or disclose a configuration for improving this problem.

[0030] Patent document 7 relates to a caulking machine for manufacturing ball joints and discloses one that includes a sensor means for detecting the position of a pushing assembly that presses the cap, but there appears to be no motivation to apply this to beading of cylindrical cans.

[0031] As described above, the prior art has been unable to recognize problems due to the positions of the upper and lower CFBs, beading knife, and backup roller, which are important factors in a beading device for cylindrical batteries, and has lacked a means for grasping or measuring these problems. [Prior art documents] [Patent documents]

[0032] [Patent Document 1] Korean Patent Publication No. 10-2022-0033187

[0033] [Patent Document 2] Patent No. 4989962

[0034] [Patent Document 3] Korean Patent Registration No. 10-1050314

[0035] [Patent Document 4] Korean Patent Registration No. 10-1345340

[0036] [Patent Document 5] Japanese Patent Application Laid-Open No. 1997-035693

[0037] [Patent Document 6] Japanese Patent Application Laid-Open No. 2007-123224

[0038] [Patent Document 7] Korean published utility model no. 20-2012-0004056 Summary of the Invention [Problem to be solved by the invention]

[0039] The present invention has been made to solve the above problems, and aims to provide a means for grasping or measuring the positions of the upper CFB, lower CFB, beading knife, and backup roller, which are important factors in a beading device for cylindrical batteries. [Means for solving the problem]

[0040] To achieve the above object, the present invention provides a beading device for cylindrical batteries, including a beading knife that forms a beading portion on the side of a cylindrical can, a backup roller that supports the cylindrical can on the other side of the cylindrical can when the beading knife forms a beading portion on the cylindrical can, and individual beading units including upper and lower CFBs (hereinafter referred to as "CFBs") with bearing structures arranged at the top and bottom, respectively, and a cam structure in which one or more of the individual beading units are arranged in a circle and rotate the individual beading units based on the central axis of the circle, the beading device also including a position measurement unit that measures the position of at least one of the beading knife, the backup roller, and the upper and lower CFBs.

[0041] The position measurement unit may include one or more of: a first position measurement unit that measures at least one of a first height relative to the cylindrical can and a first distance relative to the cylindrical can with respect to the beading knife; a second position measurement unit that measures at least one of a second height relative to the cylindrical can and a second distance relative to the cylindrical can with respect to the backup roller; a third position measurement unit that measures a third distance between the upper cam plate and the upper CFB; and a fourth position measurement unit that measures a fourth distance between the lower cam plate and the lower CFB.

[0042] The first to fourth position measurement units may be fixed at specific positions without rotation.

[0043] The first height and the second height are heights based on a specific point on the cylindrical can, the first distance and the second distance are distances based on the central axis of the cylindrical can, the third distance is the distance between the central axis of the bearing of the upper CFB and the lower surface of the upper cam plate, and the fourth distance is the distance between the central axis of the bearing of the lower CFB and the upper surface of the lower cam plate.

[0044] The cam structure includes a cylindrical cam support portion, a lower cam plate disposed on top of the cam support portion and having a circular or donut-shaped plate-like upper surface, an upper cam plate disposed on top of the cam structure and having a circular or donut-shaped plate-like lower surface, and a central support portion disposed in the center of the cam support portion and supporting the upper cam plate.

[0045] The individual beading units are arranged in a circular shape along the outer periphery of the upper cam plate and the lower cam plate and rotate around the central axis of the circle, with the upper CFB of each individual beading unit being in close contact with the lower surface of the upper cam plate and rotating around the outer periphery of the upper cam plate around the central axis of the circle, and the lower CFB of each individual beading unit being in close contact with the upper surface of the lower cam plate and rotating around the outer periphery of the lower cam plate around the central axis of the circle.

[0046] When the individual beading units rotate around the circular central axis, they can perform the following steps at the same specific position: i) receiving a cylindrical can in an upright position from the previous process; ii) moving a beading knife and a backup roller to a position for beading; iii) using the beading knife to form a bead on the cylindrical can; iv) returning the beading knife and the backup roller to their initial positions; and v) transferring the cylindrical can after the beading process has been completed to the next process.

[0047] When the beading knife forms a beading portion on the cylindrical can, the backup roller may be located symmetrically to the beading knife with respect to the central axis of the cylindrical can.

[0048] The individual beading unit may include a cylindrical can support portion that supports a lower portion of the cylindrical can, and a cylindrical can guide that guides an upper portion of the cylindrical can.

[0049] The first and second position measuring units may be fixed by separate supports, the third position measuring unit may be fixed to a side surface of the upper cam plate, and the fourth position measuring unit may be fixed to a side surface of the lower cam plate, wherein sensors of the third and fourth position measuring units may measure the position of separate measuring dogs coupled to the bearing central shaft of the upper CFB and the bearing central shaft of the lower CFB.

[0050] The present invention also provides a cylindrical battery beading method using the cylindrical battery beading device. Specifically, the cylindrical battery beading method includes the steps of: (i) receiving a cylindrical can in an upright position from a previous process; (ii) moving a beading knife and a backup roller to a beading position; (iii) forming a beading portion on the cylindrical can with the beading knife; (iv) returning the beading knife and the backup roller to their initial positions; and (v) transferring the cylindrical can after the beading process to the next process. Meanwhile, the measurement results of the position measurement unit can be obtained for each individual beading unit to check for or monitor the presence of defects.

[0051] The present invention also provides a cylindrical can beaded using the cylindrical battery beading device, a cylindrical battery including the cylindrical can, and an electric device and a vehicle including the cylindrical battery.

[0052] Furthermore, the present invention can provide a means for solving problems by arbitrarily combining the means for solving problems described above. [Effects of the Invention]

[0053] The present invention provides a beading device for cylindrical batteries, including a beading knife that forms a beading portion on a side of a cylindrical can, a backup roller that supports the cylindrical can on the other side of the can when the beading knife forms a beading portion on the cylindrical can, individual beading units including upper and lower CFBs with bearing structures disposed at the top and bottom, respectively, and one or more of the individual beading units arranged in a circle, and a cam structure that rotates the individual beading units around a central axis of the circle, the beading device for cylindrical batteries including a position measuring unit that measures the position of at least one of the beading knife, the backup roller, and the upper and lower CFBs; a beading method for cylindrical batteries using the same; a cylindrical can beaded using the beading device for cylindrical batteries, a cylindrical battery including the same, and an electric device and a means of transportation including the same.

[0054] The present invention can grasp or measure the positions of the upper and lower CFBs, beading knife, and backup roller, which are important factors in a beading device for cylindrical batteries, thereby significantly reducing defects in the beading process.

[0055] Furthermore, since it is possible to easily identify individual beading units where defects occur, it is also very easy to improve the same.

[0056] The present invention is also effective in improving the quality of work that is repeatedly performed using a cam, and is currently being applied to many processes to improve process efficiency. [Brief explanation of the drawings]

[0057] [Figure 1] 1 is a top view of a beading device according to the prior art;

[0058] [Figure 2] 1 is a partial perspective view of the top of a prior art beading device;

[0059] [Figure 3] 1 is a partial perspective view of the lower part of a prior art beading device;

[0060] [Figure 4] 1 is a cross-sectional view of an entire individual beading unit of a beading device according to the prior art;

[0061] [Figure 5] 1 is a partial cross-sectional view of an individual beading unit of a beading device according to the prior art;

[0062] [Figure 6] 1 is a top view of a beading device according to the present invention;

[0063] [Figure 7] 1 is a partial perspective view of the top of a beading apparatus according to the present invention;

[0064] [Figure 8] 1 is a partial perspective view of the lower part of a beading device according to the present invention;

[0065] [Figure 9] 4 is a cross-sectional view of a beading knife of an individual beading unit of a beading device according to the present invention and a horizontal position measuring unit for the beading knife.

[0066] [Figure 10] 1 is a cross-sectional view of a beading knife of an individual beading unit of a beading device according to the present invention and a vertical position measuring unit for the beading knife.

[0067] [Figure 11] 4 is a cross-sectional view of a backup roller of an individual beading unit of a beading device according to the present invention and a position measuring unit for the backup roller;

[0068] [Figure 12]1 is a cross-sectional view of an entire individual beading unit of a beading device according to the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0069] In this application, the terms "comprises," "has," "has," and the like are intended to specify the presence of features, numbers, steps, elements, components, or combinations thereof described in the specification, and should be understood as not precluding the possibility of the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

[0070] When a component is said to be "coupled" or "connected" to another component, it should be understood that it can be directly coupled or connected to the other component, but that there can also be other components in between. On the other hand, when a component is said to be "directly coupled" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions describing the relationship between components, such as "between" and "immediately between," or "adjacent to" and "directly adjacent to," should be interpreted similarly.

[0071] Furthermore, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted as having an ideal or overly formal meaning unless expressly defined in this application.

[0072] Hereinafter, with reference to the accompanying drawings, a detailed description will be given of an embodiment of the present invention that will enable a person skilled in the art to easily carry out the present invention. In describing the operation principle of the embodiment of the present invention in detail, detailed description of related well-known functions or configurations will be omitted if it is determined that such detailed description may unnecessarily obscure the gist of the present invention.

[0073] Furthermore, the same reference numerals are used throughout the drawings for parts having similar functions and actions. Throughout the specification, when a part is said to be connected to another part, this includes not only a direct connection but also an indirect connection via another element therebetween. Furthermore, unless otherwise specified, "including a certain element" does not mean that other elements are excluded, but that other elements may also be included.

[0074] Furthermore, descriptions that limit or add specific elements are applicable to all inventions and are not limited to a particular invention unless otherwise specified.

[0075] Furthermore, throughout the description of the present invention and the claims, the singular includes the plural unless otherwise stated.

[0076] Furthermore, throughout the description of the present invention and the claims, unless otherwise specified, "or" includes "and." Therefore, "including A or B" means three cases: including A, including B, or including both A and B.

[0077] Furthermore, all numerical ranges include the endpoints and all intermediate values ​​therebetween unless expressly stated to the contrary.

[0078] The present invention will be described in detail with reference to the accompanying drawings. The beading apparatus according to the present invention is the same as or similar to the beading apparatus according to the prior art, except that it is provided with a position measuring unit 300, and therefore a description of the overlapping parts will be omitted.

[0079] Figure 6 is a top view of a beading device according to the present invention, Figure 7 is a partial perspective view of the upper part of a beading device according to the present invention, Figure 8 is a partial perspective view of the lower part of a beading device according to the present invention, Figures 9 and 10 are cross-sectional views of a beading knife of an individual beading unit of a beading device according to the present invention and a position measurement unit for the same, Figure 11 is a cross-sectional view of a backup roller of an individual beading unit of a beading device according to the present invention and a position measurement unit for the same, and Figure 12 is a cross-sectional view of an entire individual beading unit of a beading device according to the present invention.

[0080] 6 to 12, the present invention provides a beading device for cylindrical batteries, including a beading knife 150 that forms a beading portion on a side of a cylindrical can 130, a backup roller 160 that supports the cylindrical can 130 on the other side of the cylindrical can 130 when the beading knife 150 forms a beading portion on the cylindrical can 130, and individual beading units 100 including upper and lower CFBs 110 and 120 having bearing structures disposed at the top and bottom, respectively, and a cam structure 200 in which one or more of the individual beading units 100 are arranged in a circle and rotate the individual beading units 100 based on a central axis 245 of the circle, and the beading device for cylindrical batteries includes a position measuring unit 300 that measures the position of at least one of the beading knife 150, the backup roller 160, and the upper and lower CFBs 110 and 120.

[0081] Each individual beading unit 100 may include additional bearings 115, 225 for supporting the individual beading unit 100 in addition to the upper CFB 110 and lower CFB 120. The position measurement unit 300 may be any device including a sensor for measuring distance, and may include a laser sensor, an eddy current sensor, etc. It may also be a sensor using a physical chip. A separate measurement dog capable of detecting the position of the sensor is attached to each individual measurement position, and the position can be measured using the measurement dog. The value measured by the sensor may also be converted to digital data and transmitted.

[0082] The position measuring unit 300 includes a first position measuring unit 310 that measures a first height 315 relative to the cylindrical can 130 and a first distance 317 relative to the cylindrical can 130 with respect to the beading knife 150, a second position measuring unit 320 that measures a second height 325 relative to the cylindrical can 130 and a second distance 327 relative to the cylindrical can 130 with respect to the backup roller 160, a third position measuring unit 330 that measures a third height between the upper cam plate 230 and the upper CFB 110, and a fourth position measuring unit 340 that measures a fourth height between the lower cam plate 220 and the lower CFB 120.

[0083] Specifically, the first height 315 and the second height 325 are heights based on a specific point on the cylindrical can 130, the first distance 317 and the second distance 327 are distances based on the central axis of the cylindrical can 130, the third height is the distance between the central axis of the bearing of the upper CFB 110 and the lower surface of the upper cam plate 230, and the fourth height is the distance between the central axis of the bearing of the lower CFB 120 and the upper surface of the lower cam plate 220.

[0084] When performing the beading operation, the beading knife 150, which maintains a constant height and depth, forms a beading portion on the entire side surface of the rotating cylindrical can 130. Since the physical size of the beading knives 150 is the same in all individual beading units 100, the first distance 317 determines the depth, which is the length that the beading knife 150 bites into the side surface of the cylindrical can 130 for the beading operation, and the first height 317 determines the height at which the beading portion is formed on the cylindrical can 130.

[0085] The first height 315, the first distance 317, the second height 325, and the second distance 327 are distances measured based on the respective support portions 312, 333, but since the position of the cylindrical can support portion 140 in the individual beading unit 100 is relatively fixed, they can be converted to distances based on the cylindrical can 130.

[0086] The first to fourth position measuring units 310 to 340 are fixed at specific positions without rotating even during the beading operation. Referring to Figure 6, the first position measuring unit 310 is disposed at the 6 o'clock position based on the position of the individual beading unit 100 in the cylindrical battery beading device, and the second position measuring unit 320 is disposed at the 3 o'clock position. The first position measuring unit 310 and the second position measuring unit 320 are fixed by separate supports 312 and 333.

[0087] The first and second position measurement units 310 and 320 are installed at positions where the beading knife 150 and the backup roller 160 move to perform beading. These positions are essentially the positions after and before beading, respectively, but the positions of the beading knife 150 and the backup roller 160 remain unchanged from the positions where beading is performed, so the desired measurement results can be obtained. Considering this, it can be seen that the first and second position measurement units 310 and 320 are not limited to their current positions, and can be placed at any position where the beading knife 150 and the backup roller 160 are located, as long as the positions are the same as the positions where beading is performed.

[0088] The first position measuring unit 310 and the second position measuring unit 320 are divided into a horizontal sensor 318 for measuring horizontal (x-axis) distance and a vertical sensor 316 for measuring vertical (y-axis) distance. The vertical sensor 316 in FIG. 9 is an eddy current sensor, while the horizontal sensor 318 and vertical sensor 316 in FIGS. 10 and 11 are both laser sensors. Specifically, the eddy current sensor in FIG. 9 measures the position of the bottom surface of the beading knife 150, and the horizontal sensor 318 in FIG. 10 measures the position of the rotation axis of the beading knife 150. The vertical sensor 316 in FIG. 11 measures the position of the bottom surface of the backup roller 150, and the horizontal sensor 318 in FIG. 11 measures the position of a separate measuring dog. However, because relative values ​​can be measured, the position relative to the cylindrical can 130 can be determined.

[0089] The sensors of the third position measuring unit 330 and the fourth position measuring unit 340 are both eddy current sensors. The types of sensors of the first position measuring unit 310 to the fourth position measuring unit 340 are not limited, and may be replaced with other sensors that measure distance or position.

[0090] 7 and 8, the third position measuring unit 330 is fixed to a side surface of the upper cam plate 230, and the fourth position measuring unit 340 is fixed to a side surface of the lower cam plate 220. The sensors of the third position measuring unit 330 and the fourth position measuring unit 340 measure the position of separate measuring dogs 335, 345 coupled to the bearing central shaft of the upper CFB 110 and the bearing central shaft of the lower CFB 120, respectively.

[0091] The cam structure 200 includes a cylindrical cam support part 210, a lower cam plate 220 disposed on the upper part of the cam support part 210 and having a circular or donut-shaped plate-like upper surface, an upper cam plate 230 disposed on the upper part of the cam structure 200 and having a circular or donut-shaped plate-like lower surface, and a central support part 240 disposed in the center of the cam support part 210 and supporting the upper cam plate 230.

[0092] The individual beading units 100 are arranged in a circular shape along the outer periphery of the upper cam plate 230 and the lower cam plate 220 and rotate based on the circular central axis 245, the upper CFB 110 of each individual beading unit 100 being in close contact with the lower surface of the upper cam plate 230 based on the circular central axis 245 and rotating along the outer periphery of the upper cam plate 230, and the lower CFB 120 of each individual beading unit 100 being in close contact with the upper surface of the lower cam plate 220 based on the circular central axis 245 and rotating along the outer periphery of the lower cam plate 220.

[0093] The individual beading units 100 arranged in a circular shape rotate around the circular central axis 245 due to the rotational movement of the upper CFB 110 and the lower CFB 120 of each individual beading unit 100. Individual coupling shafts (not shown) protruding from the central support part 240 are coupled to each individual beading unit 100 to achieve the rotational movement.

[0094] When the individual beading units 100 rotate around the circular central axis 245, at the same specific position, each unit can perform the following steps: i) receiving a cylindrical can in an upright position from the previous process; ii) moving the beading knife 150 and backup roller 160 to a position for beading; iii) the beading knife 150 forming a beading portion on the cylindrical can 130; iv) returning the beading knife 150 and backup roller 160 to their initial positions; and v) transferring the cylindrical can 130 for which the beading process has been completed to the next process.

[0095] When the beading knife 150 forms a beading portion on the cylindrical can 130 , the backup roller 160 may be located symmetrically to the beading knife 150 with respect to the central axis of the cylindrical can 130 .

[0096] The beading knife 150 must forcibly press the side of the cylindrical can 130 inward to deform it, so it uses a metal stronger than the cylindrical can 130, but the backup roller 150 is used to support the cylindrical can 130, so it is preferable that it is made of a metal with lower strength than the cylindrical can 130. In the case of a cylindrical can made of nickel-plated steel, it is preferable that the backup roller be made of a material with lower strength, such as brass.

[0097] The individual beading unit 100 may include a cylindrical can support 140 that supports the lower portion of the cylindrical can 130 and a cylindrical can guide 170 that guides the upper portion of the cylindrical can 130 .

[0098] The cylindrical can support part 140 includes a rotating roller 145 that not only supports the lower part of the cylindrical can 130 but also rotates the cylindrical can 130. The cylindrical can support part 140 moves while connected to the lower CFB 120. The cylindrical can guide 170 includes a suction part 175 that sucks in metal powder generated during the beading operation.

[0099] The present invention also provides a beading method for cylindrical batteries using the beading device for cylindrical batteries 130. Specifically, the beading method for cylindrical batteries 130 includes the steps of: i) receiving a cylindrical can in an upright position from a previous process; ii) moving a beading knife 150 and a backup roller 160 to a beading position; iii) forming a beading portion on the cylindrical can 130 with the beading knife 150; iv) returning the beading knife 150 and the backup roller 160 to their initial positions; and v) transferring the cylindrical can 130 after the beading process to the next process. Meanwhile, the measurement results of the position measurement unit 130 for the individual beading units 100 can be obtained to check or monitor for defects.

[0100] Those skilled in the art will be able to make various applications and modifications within the scope of the present invention based on the above content. [Explanation of symbols]

[0101] 100 Individual Beading Units

[0102] 110 Upper CFB

[0103] 115, 125 additional bearings

[0104] 120 Lower CFB

[0105] 130 Cylindrical can

[0106] 140 Cylindrical can support

[0107] 145 Rotating Roller

[0108] 150 Beading Knife

[0109] 160 Backup Roller

[0110] 170 Cylindrical can guide

[0111] 175 Suction part

[0112] 200 (210~245) Cam structure

[0113] 210 Cam support

[0114] 220 Lower cam plate

[0115] 230 Upper cam plate

[0116] 240 Central support part

[0117] 245 Circular central axis (central axis of cam structure)

[0118] 300(310, 320, 330, 340) Position measurement section

[0119] 310 1st position measurement section

[0120] 312, 322 Separate support part

[0121] 315 First Height

[0122] 316 Vertical Sensor

[0123] 317 1st distance

[0124] 318 Horizontal Sensor

[0125] 320 2nd position measurement section

[0126] 325 Second Height

[0127] 327 2nd distance

[0128] 330 Third position measurement section

[0129] 335, 345 Measuring Dog

[0130] 340 Fourth Position Measurement Unit

Claims

1. A beading knife that forms a beading portion on the side of a cylindrical can; a backup roller that supports the cylindrical can on the other side of the cylindrical can when the beading knife forms a beading portion on the cylindrical can; and Upper and lower CFBs (hereinafter referred to as "CFB") of bearing structures arranged at the top and bottom, respectively; and one or more of the individual beading units are arranged in a circular shape, and a cam structure that rotates the individual beading units around a central axis of the circle, A beading device for cylindrical batteries, comprising a position measuring unit that measures the position of at least one of the beading knife, the backup roller, and the upper and lower CFBs.

2. The position measurement unit a first position measuring unit configured to measure at least one of a first height relative to the cylindrical can and a first distance relative to the cylindrical can with respect to the beading knife; a second position measuring unit that measures at least one of a second height relative to the cylindrical can and a second distance relative to the cylindrical can with respect to the backup roller; a third position measurement unit that measures a third distance between the upper cam plate and the upper CFB; a fourth position measurement unit that measures a fourth distance between the lower cam plate and the lower CFB; 2. The cylindrical battery beading device according to claim 1, comprising one or more of the following:

3. The cylindrical battery beading device according to claim 2 , wherein the first to fourth position measurement units are fixed at specific positions without rotating.

4. the first height and the second height are heights based on a specific point on the cylindrical can; the first distance and the second distance are distances based on a central axis of the cylindrical can, the third distance is a distance between a bearing center axis of the upper CFB and a lower surface of the upper cam plate, The cylindrical battery beading device according to claim 2 , wherein the fourth distance is a distance between a bearing center axis of the lower CFB and an upper surface of the lower cam plate.

5. The cam structure includes: A cylindrical cam support portion; a lower cam plate disposed on the upper portion of the cam support portion and having a circular or donut-shaped upper surface; an upper cam plate disposed on the upper portion of the cam structure and having a circular or donut-shaped lower surface; a central support portion disposed at a center of the cam support portion and supporting the upper cam plate; The cylindrical battery beading device according to claim 2, comprising:

6. the individual beading units are arranged in a circle along the outer periphery of the upper cam plate and the lower cam plate, and rotate around a central axis of the circle; The upper CFB of each of the individual beading units is in close contact with the lower surface of the upper cam plate and rotates along the outer periphery of the upper cam plate based on the circular central axis, 6. The cylindrical battery beading device according to claim 5, wherein the lower CFB of each of the individual beading units is in close contact with an upper surface of the lower cam plate and rotates along an outer periphery of the lower cam plate based on the circular central axis.

7. When the individual beading units rotate around the circular central axis, at a specific identical position, each i) receiving the cylindrical can in an upright position from a previous step; ii) moving the beading knife and the backup roller into position for beading; iii) the beading knife forming a bead on the cylindrical can; iv) the beading knife and the backup roller returning to their initial positions; v) transferring the cylindrical can after the beading process to the next process; The cylindrical battery beading device according to claim 1 , which performs the above steps.

8. 2. The cylindrical battery beading device according to claim 1, wherein when the beading knife forms a beading portion on the cylindrical can, the backup roller is positioned symmetrically to the beading knife with respect to the central axis of the cylindrical can.

9. The individual beading units are a cylindrical can support portion that supports a lower portion of the cylindrical can; a cylindrical can guide for guiding an upper portion of the cylindrical can; 2. The cylindrical battery beading apparatus according to claim 1, comprising:

10. the first position measurement unit and the second position measurement unit are fixed by separate supports; the third position measurement unit is fixed to a side surface of the upper cam plate, The cylindrical battery beading device according to claim 5 , wherein the fourth position measuring unit is fixed to a side surface of the lower cam plate.

11. 11. The cylindrical battery beading device of claim 10, wherein each of the sensors of the third position measurement unit and the fourth position measurement unit measures the position relative to a separate measurement dog coupled to a bearing center axis of the upper CFB and a bearing center axis of the lower CFB.

12. A method for beading a cylindrical battery, comprising using the cylindrical battery beading device according to any one of claims 1 to 11.

13. The cylindrical battery beading method according to claim 12 , further comprising: determining whether or not there is a defect by obtaining the measurement result of the position measurement unit for each individual beading unit.

14. A cylindrical battery that has been beaded using the cylindrical battery beading device according to any one of claims 1 to 11.

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