Crimping device for cylindrical batteries equipped with a crimping pressure position measuring unit.

Abstract

The present invention relates to a crimping device for cylindrical batteries having a crimping pressure part position measurement part, and more particularly to a crimping device for cylindrical batteries including an upper body including a crimping pressure part, and one or more cams arranged in a circular shape and rotating together with the upper body, and including a position measurement sensor that can measure the height of the crimping pressure part.

Description

[Technical Field]

[0001] This application claims priority under Korean Patent Application No. 10-2023-0180135 dated December 12, 2023, and all content disclosed in said Korean Patent Application is incorporated herein as part of this specification.

[0002] The present invention relates to a crimping device for cylindrical batteries equipped with a crimping pressure position measuring unit. Specifically, the present invention relates to a crimping device for cylindrical batteries equipped with a crimping pressure position measuring unit that can measure the position of the crimping pressure unit in the process of manufacturing cylindrical battery cells to reduce or prevent the occurrence of crimping defects. [Background technology]

[0003] Rechargeable batteries are classified into cylindrical and rectangular batteries, in which the electrode assembly is housed in a cylindrical or rectangular metal can, and pouch-type batteries, in which the electrode assembly is housed in a pouch-type case made of aluminum laminate sheet, depending on the shape of the battery case.

[0004] As these secondary batteries have diverse applications and require large amounts of energy, high energy density is necessary. In the case of cylindrical battery cells, the volume of the cylindrical battery cell casing is reduced by pressing it, thereby increasing the energy density.

[0005] Figure 5 is a side view showing a part of a conventional cylindrical battery crimping device, and Figure 6 is a front view showing a part of a conventional cylindrical battery crimping device. In particular, the conventional cylindrical battery crimping device does not have a separate position measuring means for the crimping pressing part, so this part will be explained with reference to Figures 5 and 6.

[0006] As shown in Figures 5 and 6, the crimping device for cylindrical batteries includes a crimping pressing section 110 that presses the cylindrical battery and a cam plate 230A located above the crimping pressing section 110. The crimping pressing section 110 includes a roller 115 equipped with a movable roller 115A and a pressing roller 115B.

[0007] In conventional crimping devices for cylindrical batteries, the crimping pressing section 110 that presses the cylindrical battery simply performs crimping by moving and pressing the moving roller 115A and the pressing roller 115B. As such, there is no separate means to determine the position where crimping is performed, and crimping defects occur due to positional errors in the crimping pressing section 110. However, since it is not possible to accurately identify these defects, the problem cannot be improved.

[0008] Patent Document 1 describes an apparatus for manufacturing cylindrical batteries by caulking the outer circumference of the upper end of a cylindrical battery casing, but it does not include a member for measuring the position of the pressing part when pressing the cylindrical battery casing in the vertical direction.

[0009] Patent documents 2 to 4 also do not disclose a configuration corresponding to a measuring member for measuring the position of the crimping pressing portion.

[0010] The manufacturing process for cylindrical batteries is automated, with each stage rotating via a cam mechanism. However, if defects occur in a specific sequence, proactively addressing this can significantly reduce the defect rate. In the crimping process, the crimping press moves downward due to the pressure applied by the press roller 115B. Prior to crimping, the cylindrical battery is fixed by the battery cell fixing part, and the crimping press moves downward while crimping is performed. Therefore, by understanding the final downward position of the crimping press, the quality of the overall crimping process can be easily determined. Despite these points, conventional technology seems to have simply involved the continuous operation of mechanical manufacturing equipment without recognizing or addressing these aspects. [Prior art documents] [Patent Documents]

[0011] [Patent Document 1] U.S. Patent No. 5772704

[0012] [Patent Document 2] Korean Utility Model Registration Publication No. 20-2012-0004056 Specification

[0013] [Patent Document 3] Korean Utility Model Registration No. 20-0485904 Specification

[0014] [Patent Document 4] Korean Patent No. 10-1075879 Specification [Overview of the project] [Problems that the invention aims to solve]

[0015] The present invention is for solving the above problems, and is a crimping device for a cylindrical battery, and aims to provide a crimping device for a cylindrical battery provided with a crimping pressing part position measuring part that can reduce or prevent the occurrence of crimping defects generated in the crimping pressing part.

Means for Solving the Problems

[0016] The crimping device for a cylindrical battery according to the present invention for solving the above problems is a crimping device (10) for a cylindrical battery including an upper body (100) including a crimping pressing part (110), and a cam (200) in which one or more of the upper bodies (100) are arranged in a circular shape and rotate together at the same time, and includes a position measuring sensor (300) capable of measuring the height of the crimping pressing part (110).

[0017] In the crimping device for a cylindrical battery according to the present invention, the upper body (100) includes a battery cell fixing part (120) arranged inside the upper body (100) where a cylindrical battery cell is fixed, and a crimping pressing part (110) that presses while moving from top to bottom after the cylindrical battery cell is fixed to the battery cell fixing part (120) to form a crimping part on the cylindrical battery cell.

[0018] In the crimping device for a cylindrical battery according to the present invention, the battery cell fixing part (120) includes a fixing jaw (125) that fixes the beading part of the cylindrical battery cell.

[0019] In the crimping device for a cylindrical battery according to the present invention, a roller (115) is arranged above the crimping pressing part (110), and the position measuring sensor (300) measures the position of the roller (115).

[0020] In the crimping device for a cylindrical battery according to the present invention, a measurement dog (117) for position measurement is provided on the central axis of the roller (115), and the position measurement sensor (300A) measures the height of the measurement dog (117).

[0021] In the crimping device for a cylindrical battery according to the present invention, it includes a cam plate (230) located above the cam (200), having a fixed height and formed with a through hole (231), and a measurement part (400) located in a state of passing through the through hole (231) and whose position is measured by the position measurement sensor (300B).

[0022] In the crimping device for a cylindrical battery according to the present invention, the measurement part (400) includes a contact part (410) that contacts the roller (115), and an extension part (420) whose one side is connected to the contact part (410) and the other side extends above the cam plate (230) through the through hole (231).

[0023] In the crimping device for a cylindrical battery according to the present invention, a support shaft (500) for supporting the position measurement sensor (300B) is provided on the upper surface of the cam plate (230).

[0024] In the crimping device for a cylindrical battery according to the present invention, a movement guide part (600) for guiding the movement of the measurement part (400) is provided on the side surface of the extension part (420).

[0025] In the crimping device for a cylindrical battery according to the present invention, the position measurement sensor (300B) is an eddy current sensor.

[0026] In the crimping device for a cylindrical battery according to the present invention, the position measurement sensor (300B) measures the distance (D) from the position measurement sensor (300B) to the upper surface of the extension part (420).

[0027] The crimping device for a cylindrical battery according to the present invention includes a support portion (700) fixed to the side surface of the extension portion (420) and supporting the extension portion (420) so that it does not fall downward due to the cam plate (230).

[0028] Furthermore, the present invention can also be provided in forms that combine various means for solving the above-mentioned problems. [Effects of the Invention]

[0029] This invention includes a measuring unit capable of measuring the vertical position of the crimping pressing section, thereby reducing or preventing the occurrence of crimping defects in the crimping pressing section. Furthermore, since it is possible to determine whether there are defects or abnormalities in each upper body, it is possible to easily repair or replace any abnormal parts. [Brief explanation of the drawing]

[0030] [Figure 1] This is a perspective view showing a crimping device for a cylindrical battery according to a first embodiment of the present invention.

[0031] [Figure 2] This is a perspective view showing a crimping device for a cylindrical battery according to a second embodiment of the present invention.

[0032] [Figure 3] This is a schematic diagram of the battery cell fixing part according to the present invention.

[0033] [Figure 4] This is a schematic diagram showing how a cylindrical battery cell is fixed using the battery cell fixing part according to the present invention.

[0034] [Figure 5] This is a side view showing a part of a conventional crimping device for cylindrical batteries.

[0035] [Figure 6]This is a front view showing a part of a conventional crimping device for cylindrical batteries.

[0036] [Figure 7] This is a side view of the position measuring unit according to the first embodiment of the present invention.

[0037] [Figure 8] This is a side view showing a crimping device for a cylindrical battery according to a second embodiment of the present invention.

[0038] [Figure 9] This is a front view of a cylindrical battery cell crimping device according to a second embodiment of the present invention.

[0039] [Figure 10] This is a side view showing the state in which the measuring section has been lowered by a certain distance in a crimping device for cylindrical battery cells according to a second embodiment of the present invention.

[0040] [Figure 11] This is a side view showing the state in which the measuring section has been raised by a certain distance in a crimping device for cylindrical battery cells according to a second embodiment of the present invention. [Modes for carrying out the invention]

[0041] Hereinafter, with reference to the attached drawings, embodiments that allow a person with ordinary skill in the art to which the present invention pertains to be easily implemented will be described in detail. In describing the operating principles of embodiments of the present invention in detail, if it is determined that a specific description of a related known function or configuration may unnecessarily obscure the gist of the present invention, such detailed description will be omitted.

[0042] Throughout the drawings, the same reference numerals shall be used for parts that have similar functions and operations. In the specification, when it is said that one part is connected to another part, this includes not only direct connection but also indirect connection through other elements in between. Furthermore, when it is said that a component is included, unless otherwise stated, it does not mean that other components are excluded, but rather that other components may be included.

[0043] Descriptions that limit or elaborate on the constituent elements are applicable to all inventions and are not limited to a particular invention, unless otherwise specified.

[0044] Throughout the description of this invention and the claims, singular nouns include plural nouns unless otherwise specified.

[0045] Throughout the description and claims of this invention, "or" includes "and" unless otherwise specified. Therefore, "including A or B" means three cases: including A, including B, or including both A and B.

[0046] The following description of a crimping device for a cylindrical battery equipped with a crimping pressure position measuring unit according to the present invention will be given with reference to the attached drawings.

[0047] Figure 1 is a perspective view showing a crimping device for a cylindrical battery according to the first embodiment of the present invention, Figure 3 is a schematic diagram of a battery cell fixing part according to the present invention, Figure 4 is a schematic diagram showing a state in which a cylindrical battery cell is fixed using the battery cell fixing part according to the present invention, and Figure 7 is a side view of a position measuring part according to the first embodiment of the present invention.

[0048] Referring to Figures 1, 3, 4, and 7, the crimping device 10 for a cylindrical battery according to the first embodiment of the present invention includes an upper body 100, a cam 200, and a position measuring sensor 300A.

[0049] The upper body 100 secures the cylindrical battery C and then performs crimping, and includes a crimping pressing section 110 and a battery cell fixing section 120.

[0050] The crimping press portion 110 is for pressing the cylindrical battery C to form a crimped portion. After housing the electrode assembly inside the cylindrical battery and attaching the top cap assembly to the top, a gasket is provided and crimping is performed. The crimping press portion 110 may be a pressing member with a piston structure, and a roller 115 may be arranged on the upper part of the crimping press portion 110.

[0051] The roller 115 includes a movable roller 115A connected to the cam 200 and a pressing roller 115B for pressing the crimping pressing section 110, and the movable roller 115A and the pressing roller 115B are configured to share the same central axis.

[0052] A measuring dog 117 is provided on one side of the central axis of the roller 115, which can serve as a reference for position measurement. The measuring dog 117 has a structure in which the part to be measured is horizontally flat, and such a structure makes position measurement easier and more accurate. Such measuring dogs 117 may be provided on each of the upper bodies 100 that are attached to the cam 200.

[0053] As shown in Figures 3 and 4, the battery cell fixing section 120 is for fixing the cylindrical battery before pressing the cylindrical battery, and includes a fixing jaw 125.

[0054] The fixed jaw 125 is designed to directly and tightly secure the cylindrical battery before pressing it. The fixed jaw 125 has a projection that is inserted into the beading portion of the cylindrical battery. After the fixed jaw 125 moves forward in the direction of the cylindrical battery, the projection is inserted into the beading portion and secures the cylindrical battery.

[0055] The cylindrical battery C is fixed by the battery cell fixing part 120, and then pressed by the crimping pressing part 110 to form a crimped portion.

[0056] The cylindrical battery C includes an electrode assembly, a cap assembly, and a cylindrical battery case that houses these.

[0057] To describe the electrode assembly, it is a jelly roll type electrode assembly manufactured by interposing a separation membrane between a long sheet-like positive electrode and a negative electrode, and then winding it up.

[0058] The positive electrode includes a positive electrode current collector and a positive electrode active material coated on the upper and lower surfaces of the positive electrode current collector.

[0059] The positive electrode current collector can generally have a thickness of 3 to 500 μm. It is not particularly limited as long as it has high conductivity without causing chemical changes to the battery, and for example, stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel with a surface treatment of carbon, nickel, titanium, silver, etc. can be used. Furthermore, fine irregularities can be formed on the surface to enhance the adhesion of the positive electrode active material, or it can take various forms such as film, sheet, foil, net, porous material, foam, or nonwoven fabric.

[0060] The positive electrode active material is a layered compound such as lithium cobalt oxide (LiCoO2) or lithium nickel oxide (LiNiO2), or a compound substituted with a transition metal; chemical formula Li 1+x Mn 2-x Lithium manganese oxides such as O4 (where x is 0 to 0.33), LiMnO3, LiMn2O3, LiMnO2; lithium copper oxide (Li2CuO2); vanadium oxides such as LiV3O8, V2O5, Cu2V2O7; chemical formula LiNi 1-xNi-site type lithium nickel oxide represented as MxO2 (where M = Co, Mn, Al, Cu, Fe, Mg, B, or Ga, and x = 0.01 to 0.3); chemical formula LiMn 2-x M x Lithium manganese complex oxides represented as O2 (where M = Co, Ni, Fe, Cr, Zn, or Ta, and x = 0.01 to 0.1) or Li2Mn3MO8 (where M = Fe, Co, Ni, Cu, or Zn); LiMn2O4, where part of the Li in the chemical formula is substituted with an alkaline earth metal ion; disulfide compounds; Fe2(MoO4)3, LiNi x Mn 2-x You can use formulas such as O4 (0.01 ≤ x ≤ 0.6).

[0061] On the other hand, conductive materials and binders can be mixed into the positive electrode active material, and fillers can be further added as needed.

[0062] The conductive material is usually added in an amount of 1 to 50% by weight based on the total weight of the mixture containing the positive electrode active material. Such conductive materials are not particularly limited as long as they are conductive without causing a chemical change to the battery, and examples of such materials that can be used include graphite such as natural graphite or artificial graphite; carbon black such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, and thermal black; conductive fibers such as carbon fiber and metal fiber; metal powders such as carbon fluoride, aluminum, and nickel powder; conductive whiskers such as zinc oxide and potassium titanate; conductive metal oxides such as titanium oxide; and conductive materials such as polyphenylene derivatives.

[0063] The binder is a component that helps bind the positive electrode active material and the conductive material and also bind to the current collector, and is usually added in an amount of 1 to 50% by weight based on the total weight of the mixture containing the positive electrode active material 120. Examples of such binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinyl pyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene-butadiene rubber, fluorine rubber, various copolymers, and the like.

[0064] On the other hand, after being connected to the non-coated part of the positive electrode, the positive electrode tab that extends upward by a certain length is electrically connected to the cap assembly.

[0065] The negative electrode includes a negative electrode current collector and a negative electrode active material coated on the lower and upper surfaces of the negative electrode current collector.

[0066] The negative electrode current collector is generally manufactured to have a thickness of 3 to 500 μm. Such a negative electrode current collector is not particularly limited as long as it has conductivity while not causing a chemical change to the battery. For example, copper, stainless steel, aluminum, nickel, titanium, fired carbon, a surface of copper stainless steel surface-treated with carbon, nickel, titanium, silver, etc., an aluminum cadmium alloy, and the like can be used.

[0067] Also, fine irregularities can be formed on the surface to strengthen the binding force of the negative electrode active material, and various forms such as films, sheets, foils, nets, porous bodies, foams, non-woven bodies, etc. can be used.

[0068] Examples of the negative electrode active material include carbon such as non-graphitizable carbon and graphite-based carbon; Li x Fe2O3 (0 ≦ x ≦ 1), Li x WO2 (0 ≦ x ≦ 1), Sn x Me 1-x Me' y O z(Me: Mn, Fe, Pb, Ge; Me': Al, B, P, Si, Group 1, 2, 3 elements of the periodic table, halogen; 0 < x ≤ 1; 1 ≤ y ≤ 3; 1 ≤ z ≤ 8), etc. of metal composite oxides; lithium metal; lithium alloy; silicon-based alloy; tin-based alloy; metal oxides such as SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4, Bi2O5; conductive polymers such as polyacetylene; Li-Co-Ni-based materials; Si-based materials which are Si, SiO, SiO2 alone or mixtures thereof can be used, but are not limited thereto only.

[0069] Of course, a conductive material and a binder can be additionally mixed into the negative electrode active material and coated on the negative electrode current collector.

[0070] The conductive material is a component for further improving the conductivity of the negative electrode active material, and carbon blacks such as acetylene black, ketjen black, channel black, furnace black, lamp black, thermal black; conductive fibers such as carbon fibers, metal fibers; metal powders such as carbon fluoride, aluminum, nickel powder; conductive whiskers such as zinc oxide, potassium titanate; conductive metal oxides such as titanium oxide; conductive materials such as polyphenylene derivatives can be used in a certain ratio.

[0071] The binder is a component that helps to bond the negative electrode active material to conductive materials and to the current collector, and may include at least one selected from the group consisting of styrene butadiene rubber (SBR), acrylonitrile butadiene rubber, acrylic rubber, butyl rubber, fluororubber, polyvinyl alcohol, carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinyl alcohol (PVA), polyacrylic acid (PAA), polyethylene glycol (PEG), polyacrylonitrile (PAN), and polyacrylamide (PAM).

[0072] On the other hand, the negative electrode tab, which is connected to the plain portion of the negative electrode and extends downwards for a certain length, is electrically connected to the cylindrical battery case, or more specifically, to the bottom surface.

[0073] The separation membrane prevents the aforementioned short circuit between the cathode and cathode, allowing only the movement of lithium ions. The material of such a separation membrane is preferably, but not limited to, one selected from polyethylene, polypropylene, polyethylene / polypropylene double layer, polyethylene / polypropylene / polyethylene triple layer, polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper.

[0074] Insulating members are located at the top and bottom of the electrode assembly housed in the cylindrical battery case, and these insulating members serve to insulate the electrode assembly from the cap assembly and from the electrode assembly from the cylindrical battery case.

[0075] The cap assembly is located on top of the electrode assembly, electrically connected to the positive electrode tab of the electrode assembly, and coupled to the upper open end of the cylindrical battery case, sealing the electrode assembly which is housed inside the cylindrical battery case.

[0076] Specifically, the cap assembly consists of a current-blocking member, a current-blocking gasket, a safety vent, a PTC element, and a top cap, which are stacked sequentially from bottom to top, with crimping gaskets located on the outer edges of the current-blocking member and the top cap.

[0077] The current interruption member, also called a CID (Current Interrupt Device), is located at the top of the electrode assembly, with a positive electrode tab connected to a predetermined position on its underside. For example, although the drawing shows the current interruption member as a flat plate type, it can also have a shape with the center bulging upwards.

[0078] The upper part of the current-cutting member is a safety vent, which is formed with its center protruding downward and has one or more notches. The safety vent cuts off the current and exhausts gas when the internal pressure of the cylindrical battery case rises, and is positioned so that one side is in contact with the PTC element and the end face of the edge is in contact with the crimping gasket.

[0079] The current-blocking gasket is positioned such that the current-blocking member and the safety vent remain electrically insulated, except for any portions that protrude downward from the current-blocking member and the safety vent.

[0080] The top cap, located at the very top, seals the open upper end of the cylindrical battery case, forming the positive terminal. The top cap has one or more venting holes, which allow venting gas generated inside the cylindrical battery case to be released to the outside, preventing an explosion.

[0081] In the manufacturing of typical cylindrical batteries, crimping and beading processes are performed to secure the cap assembly.

[0082] Crimping gaskets are interposed on the outer edges, i.e., the outer circumferential surfaces, of the current-cutting member, safety vent, PTC element, and top cap 250 to prevent deformation or damage of these unit components during the crimping and beading processes, and to improve the adhesion between the current-cutting member and the top cap.

[0083] Here, the crimping gasket is not particularly limited as long as it is made of a material having a predetermined elasticity and durability, and may be, for example, polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), or perfluoroalkoxy (PFA).

[0084] The cylindrical battery case houses the electrode assembly and the cap assembly. A negative electrode tab extends downwards so that the bottom of the cylindrical battery case body acts as the negative electrode, and is then connected to the bottom of the cylindrical battery case.

[0085] As mentioned above, the cylindrical battery case is equipped with a crimping section at its upper end to seal the outer surface of the cap assembly, and a beading section below the crimping section that curves inward, thereby firmly fixing the electrode assembly and the cap assembly and protecting them from external impacts.

[0086] The cam 200 has a donut shape and is rotationally driven, rotating together with the upper body 100 connected by the moving roller 115A to move the upper body 100 to the stage-by-stage execution position of the manufacturing process.

[0087] The manufacturing process performed by the upper body 100 as it moves by the rotation of the cam 200, depending on the position, may include the steps of housing the cylindrical battery, fixing the cylindrical battery, crimping the cylindrical battery to form a crimped portion, and discharging the cylindrical battery with the crimped portion formed on it.

[0088] The cam 200 is located on top of the cam support portion 210, and a cylindrical central support portion 220 is provided in the center of the cam support portion 210, and a disc-shaped cam plate 230A is provided on the upper surface of the central support portion 220.

[0089] The central support section 220 may be equipped with a separate support rail (not shown) that allows the upper body 100 to move along the circumferential direction of the central support section 220 at a certain distance while in a vertical position.

[0090] The position measuring sensor 300A is located at the lower end of the cam plate 230A and measures the vertical position of the crimping pressing portion 110 to check for any abnormalities in the crimping pressing portion 110. Specifically, a measuring dog 117 for position measurement is provided on the central axis of the roller 115, and the position measuring sensor 300A measures the height of the measuring dog 117.

[0091] The position measuring sensor 300A may be an eddy current sensor that measures the distance between objects using eddy currents, or a laser sensor that measures distance by irradiating with a laser, and is not particularly limited as long as it is a sensor that can measure the vertical position of the crimping pressing part 110.

[0092] The position measuring sensor 300A measures the height of the crimping pressing portion 110 after the crimping portion has been formed, and determines whether the cylindrical battery C with the crimped portion formed is good or bad.

[0093] Figure 2 is a perspective view showing a cylindrical battery crimping device according to a second embodiment of the present invention, Figure 3 is a schematic diagram of the battery cell fixing part according to the present invention, Figure 4 is a schematic diagram showing a state in which a cylindrical battery cell is fixed using the battery cell fixing part according to the present invention, Figure 8 is a side view showing a cylindrical battery crimping device according to a second embodiment of the present invention, Figure 9 is a front view of the cylindrical battery cell crimping device according to this second embodiment, Figure 10 is a side view showing the state in which the measuring part has been lowered by a certain distance in the cylindrical battery cell crimping device according to the second embodiment of the present invention, and Figure 11 is a side view showing the state in which the measuring part has been raised by a certain distance in the cylindrical battery cell crimping device according to the second embodiment of the present invention.

[0094] The invention will be described with reference to Figures 1, 3, 4 and 8 to 11. The crimping device for a cylindrical battery according to the second embodiment of the present invention includes an upper body 100, a cam 200, a position measuring sensor 300B, a measuring section 400, a support shaft 500, a moving guide section 600, and a support section 700.

[0095] The upper body 100 and cam 200 are identical to those of the cylindrical battery crimping device 10 according to the first embodiment of the present invention, so a description of the same configuration will be omitted. The cylindrical battery crimping device according to the second embodiment does not have a measuring dog 117, and the position of the position measuring sensor 300B is also different. The cam plate 230 also differs from the cam plate 230A of the cylindrical battery crimping device according to the first embodiment in that it has a separate through hole 231 and further includes a measuring section 400, a support shaft 500, a moving guide section 600, and a support section 700.

[0096] The cam plate 230 is a disc-shaped object located on top of the central support portion 220, and has a through-hole 231 through which the measuring portion 400 passes.

[0097] As shown in Figure 8, the position measuring sensor 300B measures the distance D from the position measuring sensor 300B to the upper surface of the extension 420, thereby measuring the position of the crimping pressing portion 110. The position measuring sensor 300B measures the height of the crimping pressing portion 110 after the crimping portion has been formed, and determines whether the cylindrical battery C with the crimped portion formed is good or bad.

[0098] The measuring section 400 includes a contact section 410 that is in close contact with the roller 115, and an extension section 420 that is connected to the contact section 410 on one side and extends upward from the cam plate 230 through a through hole 231 in the cam plate 230 on the other side.

[0099] The contact portion 410 is in close contact with the roller 115 and can move vertically depending on the position of the roller 115. The lower edge of the contact portion 410 has a gently rounded shape. This is to prevent damage from collision when in close contact with the roller 115, which moves horizontally.

[0100] The central part of the contact area 410, excluding the edges, is flat in the horizontal direction. This is to prevent positional errors of the roller 115 from occurring due to the contact area when the roller 115 is in close contact with it.

[0101] If the contact portion 410 must be inside the through hole 231, the size of the through hole 231, or more precisely, its cross-section, must be larger than the cross-section of the contact portion 410. If the contact portion 410 does not need to be inside the through hole 231, the cross-section of the through hole 231 does not need to be larger than the cross-section of the contact portion 410.

[0102] For example, in order to prevent the contact portion 410 from rising more than necessary, passing through the through hole 231, and protruding from the upper part of the cam plate 230, the cross-section of the through hole 231 can be made smaller than the cross-section of the contact portion 410.

[0103] Since the extension 420 extends above the cam plate 230 by passing through the through hole 231 of the cam plate 230, its position is measured by the position measuring sensor 300B which is located above the cam plate 230 at a distance.

[0104] An incision is formed on the side of the central part of the extension 420, with only a certain area being cut open.

[0105] The support shaft 500 is provided so that the position measuring sensor 300B can be positioned at an upper part separated from the cam plate 230. One end is connected to the cam plate 230 and extends vertically, while the other end is connected to the position measuring sensor 300B and fixes the position measuring sensor 300B in place.

[0106] The movement guide portion 600 is located on the side of the extension portion 420, which is situated on the upper part of the cam plate 230, and is a member that guides the extension portion 420 so that it can move in the vertical direction.

[0107] The movable guide section 600 may be formed in the shape of a cylindrical rod and connected to the extension section 420, with the extension section 420 moving along the rod shape, or it may be formed in the shape of a rail and connected to the extension section 420, with the extension section 420 moving along the rail.

[0108] The support portion 700 may have a shape in which one side is fixed to the upper surface of the cam plate 230 and the other side extends horizontally, and the extended portion of the other side of such a support portion 700 may be positioned to be inserted in the direction of the incision formed on the side surface of the extension portion 420.

[0109] Since a portion of the support portion 700 is inserted in the direction of the incision formed on the side of the extension portion 420, it is possible to prevent the extension portion 420 from falling below the cam plate 230.

[0110] A separate stopper 520, fixed to the support shaft 500, is provided on the side of the position measuring sensor 300B to prevent the position measuring sensor 300B from directly contacting the upper surface of the extension 420.

[0111] Although specific parts of the present invention have been described in detail above, such specific techniques are merely preferred modes of implementation and do not limit the scope of the present invention. It will be obvious to those skilled in the art that various changes and modifications are possible within the scope of the present invention and its technical concept, and it goes without saying that such variations and modifications also fall within the scope of the appended claims. [Explanation of symbols]

[0112] 10 Crimping device

[0113] 100 Upper fuselage

[0114] 110 Crimping Pressing Section

[0115] 115 Roller

[0116] 115A Mobile Roller

[0117] 115B Pressure Roller

[0118] 117 Measurement Dog

[0119] 120 Battery cell fixing part

[0120] 125 Fixed jaw

[0121] 200 Cam

[0122] 210 Cam support

[0123] 220 Central support part

[0124] 230, 230A Cam Plate

[0125] 231 Through Hole

[0126] 300, 300A, 300B position measurement sensors

[0127] 400 Measuring part

[0128] 410 Contact area

[0129] 420 Extension

[0130] 500 Support shaft

[0131] 520 Stopper

[0132] 600 Mobile Guide Section

[0133] 700 Support part

[0134] C Cylindrical battery cell

[0135] D: Distance from the position measurement sensor to the top surface of the extension.

Claims

1. An upper body including a crimping pressing portion that presses a cylindrical battery cell to form a crimped portion on the cylindrical battery cell, A crimping device for a cylindrical battery, comprising a plurality of upper bodies arranged in a circle and a cam that rotates together with them simultaneously, A crimping device for a cylindrical battery, including a position measuring sensor capable of measuring the height of the crimping pressing portion.

2. The aforementioned upper torso is The crimping device for a cylindrical battery according to claim 1, comprising a battery cell fixing portion disposed inside the upper body and for which a cylindrical battery cell is fixed.

3. The cylindrical battery crimping device according to claim 2, wherein the battery cell fixing portion includes a fixing jaw for fixing the beading portion of the cylindrical battery cell.

4. A crimping device for a cylindrical battery according to claim 1, wherein a roller is positioned on the upper part of the crimping pressing portion, and the position measuring sensor measures the position of the roller.

5. A measuring dog for position measurement is provided on the central axis of the roller. The crimping device for a cylindrical battery according to claim 4, wherein the position measuring sensor measures the height of the measuring dock.

6. A cam plate located above the cam, having a fixed height and a through hole formed therein, A crimping device for a cylindrical battery according to claim 4, comprising: a measuring unit positioned in a state that penetrates the through-hole and whose position is measured by the position measuring sensor.

7. The crimping device for a cylindrical battery according to claim 6, wherein the measuring section includes a contact section that is in close contact with the roller, and an extension section that is connected to the contact section on one side and extends above the cam plate through the through hole on the other side.

8. The crimping device for a cylindrical battery according to claim 6, wherein the upper surface of the cam plate is provided with a support shaft for supporting the position measuring sensor.

9. The crimping device for a cylindrical battery according to claim 7, wherein the side surface of the extension is provided with a movement guide portion for guiding the movement of the measuring portion.

10. The crimping device for a cylindrical battery according to claim 6, wherein the position measuring sensor is an eddy current sensor.

11. The crimping device for a cylindrical battery according to claim 7, wherein the position measuring sensor measures the distance from the position measuring sensor to the upper surface of the extension.

12. A crimping device for a cylindrical battery according to any one of claims 7, 9, and 11, comprising a support portion fixed to the side surface of the extension portion and supporting the extension portion so that it does not fall downward by the cam plate.

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