Beading device for cylindrical battery additionally including position measurement device

Abstract

The present invention relates to a beading device for a cylindrical battery, the beading device additionally including a position measurement device. The beading device comprises: a beading knife that forms a beading portion on one side of a cylindrical can; a backup roller that supports the cylindrical can from the other side of the cylindrical can while the beading knife is forming the beading portion on the cylindrical can; individual beading units including an upper CFB and a lower CFB having bearing structures and disposed in the upper and lower portions, respectively; and a cam structure in which one or more of the individual beading units are arranged in a circle and rotated about the central axis of the circle, wherein the beading device additionally includes the position measurement device for measuring the position of at least one of the beading knife, the backup roller, or the upper CFB and the lower CFB.

Description

Beading device for a cylindrical battery with an added position measuring unit

[0001] The present invention relates to a beading device for a cylindrical battery with an added position measuring unit. Specifically, the invention relates to a cylindrical battery beading device with an added position measuring 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 in a cylindrical battery, and a method for forming a beading portion in a cylindrical battery using the device.

[0002] A lithium secondary battery includes an electrode assembly including a positive electrode coated with a positive electrode active material, a negative electrode coated with a negative electrode active material, a separator positioned between the positive electrode and the negative electrode to prevent short circuiting and enable movement of lithium ions (Li-ions), a battery case that accommodates the electrode assembly, and an electrolyte that is injected into the inside of the battery case to enable movement of lithium ions.

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

[0004] A cylindrical battery comprises a cylindrical can, a jelly-roll electrode assembly accommodated inside the cylindrical can, a cap assembly coupled to the top of the cylindrical can, a beading portion for mounting 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 in the can corresponding to the upper outer surface of the jelly-roll electrode assembly, installing a cap assembly equipped with a gasket, and then crimping and sizing the top of the can.

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

[0006] Referring to FIG. 1, a beading device according to the prior art is a cam structure in which ten individual beading units (100) are arranged in a circle and rotate the individual beading units (100) based on the central axis of the circle (the central axis of the cam structure, 245). The individual beading units (100) receive a cylindrical can having a jelly-roll electrode assembly inserted therein from the previous step process in an upright state. The previous step process may also be a device in which the individual units rotate based on the central axis of another circle, similar to the beading device according to the prior art. These two rotating devices mesh at one position like gears meshing to transport the cylindrical battery completed in each device to the next step. The previous step process is omitted in FIG. 1.

[0007] Among the beading devices according to the prior art, ten individual beading units (100) receive a cylindrical can in an upright state from the previous process at a specific location, position A in FIG. 1. Thereafter, the individual beading units (100) rotate clockwise to fix the received cylindrical can, and the backup roller and the beading knife move up and down and horizontally to a specific location, the beading knife performs the beading work, and then the backup roller and the beading knife return to the initial position and the cylindrical can with the completed beading work is transferred to the next process (position B), thereby completing one cycle. All ten individual beading units (100) rotate around the circular central axis (245) and perform the same work at a specific location.

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

[0009] Referring to FIGS. 1 to 3, each of the individual beading units (100) has two bearings, an upper CFB (Cam Follower Bearing) (110) and a lower CFB (120), which rotate along the outer periphery of a lower cam plate (220) positioned on the upper portion of a cylindrical cam support member (210) and an upper cam plate (230) positioned on the upper portion of the entire beading device. The upper CFB (110) is positioned on the upper portion of the individual beading unit (100), and the lower CFB (120) is positioned on the lower portion of the individual beading unit (100).

[0010] As the individual beading unit (100) continuously rotates by the upper CFB (110) and the lower CFB (120), the devices inside the individual beading unit (100) move up and down to perform the beading work of the cylindrical can. That is, the rotational movement of the two CFBs (110, 120) is connected to the linear movement of the devices inside the individual beading unit (100), and devices that rotate like the beading device according to the prior art are typically called cam devices or cam structures.

[0011] The upper CFB (110) and the lower CFB (120) move at a constant height by closely contacting the upper surface of the lower cam plate (220) and the lower surface of the upper cam plate (230), which are arranged horizontally, 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 substances attached to them, the upper CFB (110) and the lower CFB (120) cannot rotate while maintaining a constant height. In addition, if there is a problem with 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 due to various causes, the devices inside the individual beading unit (100) also cannot perform normal linear motion due to the cam movement, which may eventually result in defective beading.

[0012] Fig. 4 is a cross-sectional view of the entire individual beading unit (100) of a beading device according to the prior art, and Fig. 5 is a cross-sectional view of a portion of the individual beading unit (100) of the beading device according to the prior art. In Figs. 2 and 3, the individual beading unit (100) is schematically omitted for brevity, and the individual beading unit (100) will be described through the cross-sectional views of Figs. 4 and 5. Meanwhile, in Figs. 4 and 5, other devices are omitted in order to describe only the portions related to the present invention.

[0013] An individual beading unit (100) includes a cylindrical can support (140) that supports a cylindrical battery, a cylindrical can (130) having a jelly-roll electrode assembly inserted therein, which is substantially not yet assembled, a beading knife (150) for creating a bead on the upper portion of the cylindrical can (130), and a backup roller (160) that is positioned symmetrically with respect to the beading knife (150) with respect to the center of the cylindrical can (130).

[0014] The beading process is a process of forcibly deforming the side surface of a cylindrical can (130) inward by a circular beading knife (150). The lower portion of the cylindrical can (130) is supported by the cylindrical can support member (140), and the rotating roller (145) of the cylindrical can support member (140) rotates the cylindrical can (130). A beading portion is formed on the entire side surface of the rotating cylindrical can (130) by the beading knife (150) that maintains a constant height and depth. Here, the depth refers to the length that the beading knife (150) digs into the side surface of the cylindrical can (130) for the beading process.

[0015] Although the cylindrical can (130) is rotating, force is applied only on one side by the beading knife (150), so there is a risk that the cylindrical can (130) may be deformed. The cylindrical can support (140) supports only the lower part of the cylindrical can (130). The cylindrical can guide (170) only guides the upper part of the cylindrical can (130) and does not actually fix it with a strong force. The cylindrical can guide (170) is provided with a suction part (175) that sucks up metal powder generated during the beading operation, so it cannot strongly fix the cylindrical can (130).

[0016] In order to prevent deformation of the cylindrical can (130) that may occur during the beading process, 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 cylindrical can (130) received, the backup roller (150) and the beading knife (160) move up and down and horizontally to a specific position, the beading knife (150) performs the beading operation, and then the backup roller (160) and the beading knife (150) return to the initial position and transfer the cylindrical can (130) with the completed beading operation to the next process, completing one cycle.

[0018] The cylindrical can newly received from the previous step process is fixed in an erected state on the cylindrical can support member (140). Since the cylindrical can support member (140) is connected to the lower CFB (120) that rotates at a constant height, it also rotates at a constant height. The rotational motion referred to here is a rotational motion that moves along the outer periphery of the lower cam plate (220).

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

[0020] Typically, the beading section provided in 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 along the x-axis and y-axis in conjunction with the rotational motion of the upper CFB (110) by the cam movement. The linked operation of the beading knife (150), the backup roller (160), the cylindrical can support (140), and the cylindrical can guide (170) may be modified in specific means according to the cam movement, but this can be easily designed and modified by a person skilled in the art, and since the configuration thereof is not a core configuration of the present invention, a detailed description thereof will be omitted.

[0021] Among the bidding devices according to the prior art, the individual bidding unit (100) has the following problems.

[0022] 1) The upper CFB (110) and the lower CFB (120) must rotate while maintaining a constant height. If not, the positions of the cylindrical can support (140), beading knife (150), and backup roller (160) may change due to cam movement.

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

[0024] In order for the beading operation of the cylindrical can (130) to proceed normally, the positions of the beading knife (150) and the backup roller (160) are most important. The height from the bottom of the cylindrical can (130) (y-axis position) and the distance from the center axis of the cylindrical can (130) (x-axis) are very important.

[0025] The beading device according to the prior art does not separately measure the positions of the upper CFB (110), lower CFB (120), beading knife (150), and backup roller (160), which are the most important elements that can cause beading defects, but performs the work by mechanical configuration or the worker manually observes them regularly / irregularly.

[0026] The beading process is very fast, and consequently, the number of cylindrical cans (130) produced is also very high. Real-time observation of the most critical factors that can cause beading defects is a crucial factor in reducing them, yet prior art has overlooked this point.

[0027] Moreover, since ten individual bidding units (100) of the same type operate simultaneously, any malfunction in any one unit can result in continuous and repetitive failures. However, with the current configuration, it is very difficult to identify a specific unit with a malfunction. For this reason, many failures actually occur in bidding operations.

[0028] Patent Documents 1 to 3, 5, and 6 all disclose jigs for securing cylindrical batteries, beading knives, and backup rollers for beading processing. However, they appear to fail to recognize defects caused by the positions of the CFB, beading knife, and backup roller, and thus 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 disclose a configuration that recognizes or improves the problem of the x-axis and y-axis positions of the beading knife.

[0030] Patent Document 7 relates to a caulking machine for manufacturing ball joints, and discloses that it includes a sensor means for detecting the position of a press-fit assembly that presses a cap, but there appears to be no motivation for applying this to the beading of cylindrical cans.

[0031] In this way, the prior art does not recognize the problems according to the positions of the upper CFB, lower CFB, beading knife, and backup roller, which are important factors in the beading device of a cylindrical battery, and also lacks the means to identify or measure these factors.

[0032] Republic of Korea Patent Publication No. 2022-0033187 (Patent Document 1)

[0033] Japanese Patent Publication No. 4989962 ('Patent Document 2')

[0034] Republic of Korea Patent Publication No. 1050314 ('Patent Document 3')

[0035] Republic of Korea Patent Publication No. 1345340 ('Patent Document 4')

[0036] Japanese Patent Publication No. 1997-035693 (Patent Document 5)

[0037] Japanese Patent Publication No. 2007-123224 (Patent Document 6)

[0038] Republic of Korea Publication of Utility Model No. 2012-0004056 (Patent Document 7)

[0039] The present invention is intended to solve the above-mentioned problems, and aims to provide a means for identifying or measuring the positions of the upper CFB, lower CFB, beading knife, and backup roller, which are important factors in a beading device for a cylindrical battery.

[0040] In order to achieve the above object, the present invention provides a cylindrical battery beading device including a beading knife for creating a beading portion on a side surface of a cylindrical can, a backup roller for supporting the cylindrical can on the other side surface of the cylindrical can when the beading knife creates a beading portion on the cylindrical can, an individual beading unit including an upper CFB and a lower CFB having a bearing structure respectively disposed at the upper and lower portions, and a cam structure in which at least one of the individual beading units is arranged in a circle and rotates the individual beading units based on a central axis of the circle, wherein the cylindrical battery beading device is further provided with a position measuring unit for measuring a position with respect to at least one of the beading knife, the backup roller, and the upper CFB and the lower CFB.

[0041] The position measuring unit may include at least one of a first position measuring unit that measures at least one of a first height 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 and a second distance relative to the cylindrical can with respect to the backup roller, a third position measuring unit that measures a third height relative to the upper cam plate with respect to the upper CFB, and a fourth position measuring unit that measures a fourth height relative to the lower cam plate with respect to the lower CFB.

[0042] The first position measuring unit to the fourth position measuring unit may be fixed at a specific position without rotating.

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

[0044] The above cam structure includes a cylindrical cam support, a lower cam plate disposed above the cam support and having a circular or donut-shaped upper surface, an upper cam plate disposed above the cam structure and having a circular or donut-shaped lower surface, and a central support disposed at the center of the cam support 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, and the upper CFB of each individual beading unit is in close contact with the lower surface of the upper cam plate around the central axis of the circle and rotates along the outer periphery of the upper cam plate, and the lower CFB of each individual beading unit is in close contact with the upper surface of the lower cam plate around the central axis of the circle and rotates along the outer periphery of the lower cam plate.

[0046] When the individual beading unit above rotates based on the central axis of the circle above, the following processes can be performed at specific identical locations: i) a process of receiving a cylindrical can in an upright state from a previous process, ii) a process of moving a beading knife and a backup roller to a position for beading, iii) a process of forming a beading portion for the cylindrical can, iv) a process of returning the beading knife and a backup roller to the initial position, and v) a process of transferring a cylindrical can with completed beading work to a next process.

[0047] When the beading knife creates a bead portion in the cylindrical can, the backup roller may be positioned symmetrically with respect to the beading knife with respect to the central axis of the cylindrical can.

[0048] The above individual beading unit may be further provided with a cylindrical can support member that supports the lower portion of the cylindrical can and a cylindrical can guide that guides the upper portion of the cylindrical can.

[0049] The first position measuring unit and the second position measuring unit may be fixed by separate supports, the third position measuring unit may be fixed to the side of the upper cam plate, and the fourth position measuring unit may be fixed to the side of the lower cam plate. At this time, the sensors of the third position measuring unit and the fourth position measuring unit may measure the position with respect to separate measuring dogs connected to the bearing center axis of the upper CFB and the bearing center axis of the lower CFB, respectively.

[0050] The present invention also provides a method for beading a cylindrical battery using the beading device for the cylindrical battery. Specifically, the method for beading a cylindrical battery includes: i) a step of receiving a cylindrical can in an upright state from a previous step; ii) a step of moving a beading knife and a backup roller to a position for beading; iii) a step of forming a beading portion with the beading knife on the cylindrical can; iv) a step of returning the beading knife and the backup roller to an initial position; and v) a step of transferring the cylindrical can, on which the beading work has been completed, to a next step. Meanwhile, the measurement results of the position measuring unit for each individual beading unit can be identified or monitored to determine or monitor whether there is a defect.

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

[0052] The present invention can also provide a problem solving means by arbitrarily combining the above problem solving means.

[0053] The present invention relates to a beading device for a cylindrical battery, comprising: a beading knife for creating a beading portion on the side surface of a cylindrical can; a backup roller for supporting the cylindrical can on the other side surface of the cylindrical can when the beading knife creates a beading portion on the cylindrical can; an individual beading unit including an upper CFB and a lower CFB having bearing structures respectively disposed at the upper and lower portions; and a cam structure for rotating the individual beading units around a central axis of the circle, wherein the cylindrical battery beading device is provided with a position measuring unit for measuring a position of at least one of the beading knife, the backup roller, and the upper CFB and the lower CFB; a method for beading a cylindrical battery using the same; a cylindrical can beaded using the beading device for the cylindrical battery and a cylindrical battery including the same; an electric device including the same; and a means of transportation.

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

[0055] In addition, it is easy to identify individual bidding units where defects occur, making it very easy to improve them.

[0056] The present invention is also excellent in improving the quality of work that is repeatedly performed in a cam format, and is currently applied to many processes to improve process efficiency.

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

[0058] Fig. 2 is a perspective view of the upper part of a beading device according to the prior art.

[0059] Fig. 3 is a perspective view of a lower portion of a beading device according to the prior art.

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

[0061] Fig. 5 is a cross-sectional view of a portion of an individual beading unit among beading devices according to the prior art.

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

[0063] Fig. 7 is a perspective view of the upper part of the beading device according to the present invention.

[0064] Fig. 8 is a perspective view of a lower portion of a beading device according to the present invention.

[0065] Fig. 9 is a cross-sectional view of a beading knife of an individual beading unit and a horizontal position measuring unit thereof among the beading devices according to the present invention.

[0066] Fig. 10 is a cross-sectional view of a beading knife of an individual beading unit and a vertical position measuring unit thereof among the beading devices according to the present invention.

[0067] Fig. 11 is a cross-sectional view of a backup roller of an individual beading unit and a position measuring unit thereof among the beading devices according to the present invention.

[0068] Figure 12 is a cross-sectional view of the entire individual beading unit among the beading devices according to the present invention.

[0069] In this application, the terms “includes,” “has,” or “comprises” are intended to specify the presence of a feature, number, step, component, part, or combination thereof described in the specification, but should be understood not to preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0070] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components in between. Conversely, when a component is referred to as being "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. Other expressions that describe the relationship between components, such as "between" and "directly between" or "adjacent to" and "directly adjacent to", should be interpreted similarly.

[0071] Additionally, 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 the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning within the context of the relevant art, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0072] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those with ordinary skill in the art can easily implement the present invention. However, when describing the operating principles of preferred embodiments of the present invention in detail, if a detailed description of a related known function or configuration is judged to unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0073] Additionally, the same drawing reference numerals are used for parts with similar functions and actions throughout the drawings. Throughout the specification, when a part is said to be connected to another part, this includes not only direct connections but also indirect connections with other elements intervening. Furthermore, inclusion of a component does not exclude other components unless specifically stated otherwise, but rather implies the inclusion of additional components.

[0074] Additionally, the description that concretizes or adds components may be applied to all inventions unless there are special limitations, and is not limited to the description of a specific invention.

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

[0076] Additionally, throughout the description and claims of the present invention, the term "or" includes "and" unless otherwise stated. Therefore, "comprising A or B" means all three cases of including A, including B, or including A and B.

[0077] Additionally, all numerical ranges include the extreme values ​​and all intermediate values ​​between them, unless explicitly stated otherwise.

[0078] The present invention will be described in detail with reference to the drawings. The bidding device according to the present invention is identical or similar to the bidding device according to the prior art except that a position measuring unit (300) is added, and therefore, description of overlapping parts will be omitted.

[0079] FIG. 6 is a top view of a beading device according to the present invention, FIG. 7 is a perspective view of an upper part of a beading device according to the present invention, FIG. 8 is a perspective view of a lower part of a beading device according to the present invention, FIGS. 9 and 10 are cross-sectional views of a beading knife of an individual beading unit and a position measuring unit thereof in a beading device according to the present invention, FIG. 11 is a cross-sectional view of a backup roller of an individual beading unit and a position measuring unit thereof in a beading device according to the present invention, and FIG. 12 is a cross-sectional view of an entire individual beading unit in a beading device according to the present invention.

[0080] Referring to FIGS. 6 to 12, the present invention provides a beading device for a cylindrical battery, comprising: a beading knife (150) for creating a beading portion on a side surface of a cylindrical can (130); a backup roller (160) for supporting the cylindrical can (130) on the other side surface of the cylindrical can (130) when the beading knife (150) creates a beading portion on the cylindrical can (130); an individual beading unit (100) including an upper CFB (110) and a lower CFB (120) having bearing structures respectively arranged at the upper and lower portions; and a cam structure (200) for rotating the individual beading units (100) around a central axis (245) of the circle, wherein at least one of the beading knife (150), the backup roller (160), and the upper CFB (110) and the lower CFB (120) is rotated. A beading device for a cylindrical battery is provided, to which a position measuring unit (300) for measuring a position is added.

[0081] Each individual beading unit (100) may be equipped with additional bearings (115, 225) for supporting each individual beading unit (100) in addition to the upper CFB (110) and the lower CFB (120). The position measuring unit (300) may be any device that includes a sensor for measuring distance, and may include a laser sensor, an eddy current sensor, etc. In addition, it may be a sensor using a physical tip. A separate measuring dog capable of detecting the position of the sensor may be attached to each measuring position, and the position may be measured with the measuring dog as a target. In addition, the value measured by the sensor may be converted into a digital form and transmitted.

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

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

[0084] When performing a beading operation, a beading portion is formed on the entire side of a rotating cylindrical can (130) by a beading knife (150) that maintains a constant height and depth. In all individual beading units (100), the physical size of the beading knife (150) is the same, and the depth, which is the length that the beading knife (150) digs into the side of the cylindrical can (130) for the beading operation, is determined by the first distance (317), and the height at which the beading portion is formed in the cylindrical can (130) is determined by the first height (317).

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

[0086] The first position measuring unit (310) to the fourth position measuring unit (340) above are fixed to a specific position without rotating even while the beading operation is in progress. Referring to FIG. 6, the first position measuring unit (310) is positioned at 6 o'clock based on the position of the individual beading unit (100) in the beading device of the cylindrical battery, and the second position measuring unit (320) is positioned at 3 o'clock. The first position measuring unit (310) and the second position measuring unit (320) are fixed by separate support members (312, 333).

[0087] The first position measuring unit (310) and the second position measuring unit (320) are installed at the positions where the beading knife (150) and the backup roller (160) move to perform the bidding. In reality, each position is after the bidding is performed and before the bidding is performed, but since the positions of the beading knife (150) and the backup roller (160) remain unchanged from the positions where the bidding is performed, the desired measurement results can be obtained. In consideration of this, it can be seen that the first position measuring unit (310) and the second position measuring unit (320) are not limited to the current positions, and can be installed anywhere as long as the beading knife (150) and the backup roller (160) are the same positions where the bidding 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 the horizontal (x-axis) distance and a vertical sensor (316) for measuring the vertical (y-axis) distance. The vertical sensor (316) of Fig. 9 is an eddy current sensor, and the horizontal sensors (318) and vertical sensors (316) of Figs. 10 and 11 both represent laser sensors. Specifically, the eddy current sensor of Fig. 9 measures the position of the lower surface of the beading knife (150), and the horizontal sensor (318) of Fig. 10 measures the position of the rotational axis of the beading knife (150). The vertical sensor (316) of Fig. 11 measures the position of the lower surface of the backup roller (150), and the horizontal sensor (318) of Fig. 11 measures the position of a separate measuring dog. However, since a relative value can be measured, the position with respect to the cylindrical can (130) can be determined through this.

[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 any sensor that measures distance or position can be replaced.

[0090] Referring to FIGS. 7 and 8, the third position measuring unit (330) is fixed to the side of the upper cam plate (230), and the fourth position measuring unit (340) is fixed to the side of the lower cam plate (220). Each sensor of the third position measuring unit (330) and the fourth position measuring unit (340) measures the position with respect to separate measuring dogs (335, 345) coupled to the bearing center axis of the upper CFB (110) and the bearing center axis of the lower CFB (120), respectively.

[0091] The above cam structure (200) includes a cylindrical cam support (210), a lower cam plate (220) disposed on the upper portion of the cam support (210) and having a circular or donut-shaped upper surface, an upper cam plate (230) disposed on the upper portion of the cam structure (200) and having a circular or donut-shaped lower surface, and a central support (240) disposed at the center of the cam support (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 central axis (245) of the circle, and the upper CFB (110) of each of the individual beading units (100) is in close contact with the lower surface of the upper cam plate (230) based on the central axis (245) of the circle and rotates along the outer periphery of the upper cam plate (230), and the lower CFB (120) of each of the individual beading units (100) is in close contact with the upper surface of the lower cam plate (220) based on the central axis (245) of the circle and rotates along the outer periphery of the lower cam plate (220).

[0093] The individual beading units (100) arranged in a circle rotate around the central axis (245) of the circle by the rotational movement of the upper CFB (110) and the lower CFB (120) of each of the individual beading units (100). In fact, individual coupling axes (not shown in the drawing) protruding from the central support (240) are coupled with each of the individual beading units (100) to create the rotational movement.

[0094] When the individual beading unit (100) above rotates based on the central axis (245) of the circle, at a specific identical position, i) a process of receiving a cylindrical can in an upright state from the previous step process, ii) a process of moving a beading knife (150) and a backup roller (160) to a position for beading, iii) a process of forming a beading portion with respect to the cylindrical can (130), iv) a process of returning the beading knife (150) and a backup roller (160) to the initial position, and v) a process of transferring the cylindrical can (130) on which the beading work has been completed to the next process can be performed.

[0095] When the beading knife (150) creates a beading portion in the cylindrical can (130), the backup roller (160) can be positioned symmetrically with respect to the beading knife (150) with respect to the central axis of the cylindrical can (130).

[0096] The beading knife (150) must forcibly deform the side of the cylindrical can (130) inwardly, so it uses a metal stronger than the cylindrical can (130). However, the backup roller (150) is intended to support the cylindrical can (130), so it is preferable to use a metal with lower strength than the cylindrical can (130). In the case of a cylindrical can using nickel-plated steel, it is preferable to use a material with lower strength, such as brass, for the backup roller.

[0097] The individual beading unit (100) may be further provided with 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 (140) includes a rotation roller (145) that supports the lower portion of the cylindrical can (130) and rotates the cylindrical can (130). The cylindrical can support (140) is coupled to the lower CFB (120) and moves. The cylindrical can guide (170) is provided with a suction unit (175) that sucks up metal powder generated during the beading process.

[0099] The present invention also provides a method for beading a cylindrical battery using the beading device of the cylindrical battery (130). Specifically, the method for beading a cylindrical battery (130) includes: i) a step of receiving a cylindrical can in an upright state from a previous step; ii) a step of moving a beading knife (150) and a backup roller (160) to a position for beading; iii) a step of forming a beading portion with the beading knife (150) on the cylindrical can (130); iv) a step of returning the beading knife (150) and the backup roller (160) to their initial positions; and v) a step of transferring the cylindrical can (130) on which the beading work has been completed to a next step. Meanwhile, the measurement result of the position measuring unit (130) for the individual beading unit (100) can be identified or monitored to determine or monitor whether there is a defect.

[0100] Anyone with ordinary knowledge in the field to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

[0101] (Explanation of symbols)

[0102] 100: Individual bidding unit

[0103] 110: Upper CFB

[0104] 115, 125: Additional bearings

[0105] 120: Lower CFB

[0106] 130: Cylindrical can

[0107] 140: Cylindrical can support

[0108] 145: Rotating roller

[0109] 150: Beading Knife

[0110] 160: Backup roller

[0111] 170: Cylindrical can guide

[0112] 175: Suction

[0113] 200: Cam structure (210 to 245)

[0114] 210: Cam support

[0115] 220: Lower cam plate

[0116] 230: Upper cam plate

[0117] 240: Central support

[0118] 245: Central axis of the circle (central axis of the cam structure)

[0119] 300: Position measurement unit (310, 320, 330, 340)

[0120] 310: First position measurement unit

[0121] 312, 322: Separate support

[0122] 315: First height

[0123] 316: Vertical sensor

[0124] 317: 1st Street

[0125] 318: Horizontal sensor

[0126] 320: Second position measurement unit

[0127] 325: Second height

[0128] 327: Second Street

[0129] 330: Third position measurement unit

[0130] 335, 345: Measuring Dog

[0131] 340: 4th position measurement unit

Claims

1. A beading knife to create a beaded portion on the side of a cylindrical can; A backup roller for supporting the cylindrical can on the other side of the cylindrical can when the beading knife creates a bead portion on the cylindrical can; Upper CFB (hereinafter referred to as 'CFB') and lower CFB (hereinafter referred to as 'CFB') having bearing structures respectively arranged at the upper and lower portions; In a cylindrical battery beading device, the beading device comprises individual beading units including one or more of the individual beading units arranged in a circle and a cam structure for rotating the individual beading units around the central axis of the circle, A cylindrical battery beading device having a position measuring unit for measuring a position with respect to the beading knife, the backup roller, and at least one of the upper CFB and the lower CFB.

2. In paragraph 1, The above position measuring unit, A first position measuring unit for measuring at least one of a first height based on the cylindrical can and a first distance based on the cylindrical can with respect to the beading knife; A second position measuring unit for measuring at least one of a second height based on the cylindrical can and a second distance based on the cylindrical can with respect to the backup roller; A third position measuring unit for measuring a third distance from the upper cam plate to the upper CFB; A fourth position measuring unit for measuring the fourth distance from the lower cam plate to the lower CFB; A beading device of a cylindrical battery comprising at least one of:

3. In paragraph 2, A beading device of the cylindrical battery, wherein the first position measuring unit to the fourth position measuring unit do not rotate and are fixed at a specific position.

4. In paragraph 2, The above first height and the above second height are heights based on a specific point of the cylindrical can, The above first distance and the above second distance are distances based on the central axis of the cylindrical can. The above third distance is the distance between the bearing center axis of the upper CFB and the lower surface of the upper cam plate, The fourth distance is the distance between the bearing center axis of the lower CFB and the upper surface of the lower cam plate, which is a beading device of a cylindrical battery.

5. In paragraph 2, The above cam structure is, Cylindrical cam support; A lower cam plate positioned on the upper part of the cam support member and having a circular or donut-shaped upper surface; An upper cam plate which is positioned on the upper part of the above cam structure and has a circular or donut-shaped plate on the lower surface; A central support portion positioned at the center of the above cam support portion and supporting the upper cam plate; A beading device for a cylindrical battery comprising:

6. In paragraph 5, The above 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. The upper CFB of each of the above individual beading units is in close contact with the lower surface of the upper cam plate based on the central axis of the circle and rotates along the outer periphery of the upper cam plate. The lower CFB of each of the above individual beading units is a cylindrical battery beading device that is in close contact with the upper surface of the lower cam plate based on the central axis of the circle and rotates along the outer periphery of the lower cam plate.

7. In paragraph 1, When the above individual beading units rotate around the central axis of the above circle, each of them is positioned at a specific identical location. i) A process of receiving a cylindrical can in an upright state from the previous process; ii) The process of moving the beading knife and backup roller into position for beading; iii) a process in which a beading knife forms a beading portion for the cylindrical can; iv) The process of returning the beading knife and backup roller to the initial position; v) A process of transferring a cylindrical can with completed beading work to the next process; A beading device for a cylindrical battery in progress.

8. In paragraph 1, A beading device for a cylindrical battery, wherein when the beading knife creates a bead portion in the cylindrical can, the backup roller is positioned symmetrically with respect to the beading knife with respect to the central axis of the cylindrical can.

9. In paragraph 1, In the above individual bidding units, A cylindrical can support member supporting the lower part of the cylindrical can; A cylindrical can guide for guiding the upper portion of the cylindrical can; A beading device for a cylindrical battery to which a charge is added.

10. In paragraph 5, The above first position measuring unit and second position measuring unit are fixed by a separate support unit, The third position measuring unit is fixed to the side of the upper cam plate, The above fourth position measuring unit is a beading device of a cylindrical battery fixed to the side of the lower cam plate.

11. In paragraph 10, A cylindrical battery beading device in which each of the sensors of the third position measuring unit and the fourth position measuring unit measures the position with respect to a separate measuring dog coupled with the bearing center axis of the upper CFB and the bearing center axis of the lower CFB, respectively.

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

13. In the beading method of a cylindrical battery according to Article 12, A beading method for a cylindrical battery, wherein the measurement results of the position measuring unit are identified for each individual beading unit to determine whether there is a defect.

14. A cylindrical battery beaded using a beading device according to any one of claims 1 to 11.

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