Crimping device for cylindrical batteries equipped with a crimping pressure part position measurement part

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 the benefit of priority based on Korean Patent Application No. 10-2023-0180135, filed December 12, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a cylindrical battery crimping device equipped with a crimping pressure part position measurement unit, and more particularly to a cylindrical battery crimping device equipped with a crimping pressure part position measurement unit that can measure the position of the crimping pressure part during the process of manufacturing cylindrical battery cells, thereby reducing or preventing the occurrence of crimping defects. [Background technology]

[0003] Depending on the shape of the battery case, secondary batteries are classified into cylindrical batteries and prismatic batteries, in which the electrode assembly is housed in a cylindrical or prismatic metal can, and pouch batteries, in which the electrode assembly is housed in a pouch-shaped case made of an aluminum laminate sheet.

[0004] Such secondary batteries are being used in a variety of applications, and there are cases where large amounts of energy are required, so high energy density is necessary. In the case of cylindrical battery cells, the can of the cylindrical battery cell is compressed to reduce the volume and increase the energy density.

[0005] Fig. 5 is a side view showing a portion of a conventional cylindrical battery crimping device, and Fig. 6 is a front view showing a portion of a conventional cylindrical battery crimping device. In particular, since the conventional cylindrical battery crimping device does not have a separate position measurement means for the crimping presser, this portion will be described with reference to Figs. 5 and 6.

[0006] As shown in Figures 5 and 6, the cylindrical battery crimping device includes a crimping presser 110 that presses the cylindrical battery and a cam plate 230A located on top of the crimping presser 110, and the crimping presser 110 includes a roller 115 having a moving roller 115A and a pressing roller 115B.

[0007] In such a conventional cylindrical battery crimping device, the crimping presser 110 that presses the cylindrical battery performs crimping simply by moving and pressing the moving roller 115A and the pressing roller 115B. As there is no separate means for determining the position where crimping is being performed, crimping defects occur due to positional errors of the crimping presser 110, but since this cannot be accurately determined, the problem cannot be resolved.

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

[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] In the cylindrical battery manufacturing process, each step is automatically performed in sequence using a cam-based rotation. However, if defects occur in a specific sequence, preemptive action can significantly reduce the defect rate. The crimping process involves the crimping presser moving downward due to the pressure applied by the pressure roller 115B. Prior to crimping, the cylindrical battery is secured by the battery cell securing member, and the crimping presser descends to perform the crimping process. Therefore, by determining the final position of the crimping presser, the overall crimping process can be easily determined. Despite this, conventional technology has only continuously operated mechanical manufacturing equipment, and has not recognized the need to measure or improve these aspects. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] U.S. Patent No. 5,772,704

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

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

[0014] [Patent Document 4] Korean Patent No. 10-1075879 Summary of the Invention [Problem to be solved by the invention]

[0015] The present invention has been made to solve the above-mentioned problems, and aims to provide a cylindrical battery crimping device having a crimping pressure part position measurement unit that can reduce or prevent the occurrence of crimping defects that occur in the crimping pressure part. [Means for solving the problem]

[0016] To solve the above problems, the present invention provides a cylindrical battery crimping device (10) including an upper body (100) including a crimping pressure part (110), and a cam (200) on which one or more upper bodies (100) are arranged in a circular shape and rotate simultaneously with the upper body (100), and the device (10) includes a position measuring sensor (300) capable of measuring the height of the crimping pressure part (110).

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

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

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

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

[0021] The cylindrical battery crimping device according to the present invention includes a cam plate (230) located on the top of the cam (200), having a fixed height and formed with a through-hole (231), and a measuring unit (400) positioned through the through-hole (231) and whose position is measured by the position measuring sensor (300B).

[0022] In the cylindrical battery crimping device according to the present invention, the measuring unit (400) includes a contacting portion (410) that contacts the roller (115) and an extension portion (420) that is connected to the contacting portion (410) at one side and passes through the through-hole (231) at the other side to extend above the cam plate (230).

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

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

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

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

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

[0028] Furthermore, the present invention can also be provided in the form of various combinations of means for solving the above problems. [Effects of the Invention]

[0029] The present invention is provided with a measuring unit that can measure the vertical position of the crimping presser, thereby reducing or preventing crimping defects that occur at the crimping presser. Also, since it is possible to determine whether or not there is a defect or abnormality in each upper body, it is possible to easily repair or replace the defective part. [Brief explanation of the drawings]

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

[0031] [Figure 2] FIG. 10 is a perspective view showing a crimping device for a cylindrical battery according to a second embodiment of the present invention.

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

[0033] [Figure 4] 10 is a schematic diagram showing a state in which a cylindrical battery cell is fixed using a battery cell fixing portion according to the present invention. FIG.

[0034] [Figure 5] 1 is a side view showing a portion of a prior art cylindrical battery crimping device.

[0035] [Figure 6]1 is a front view showing a portion of a conventional cylindrical battery crimping device.

[0036] [Figure 7] FIG. 2 is a side view of the position measurement unit according to the first embodiment of the present invention.

[0037] [Figure 8] FIG. 10 is a side view showing a cylindrical battery crimping device according to a second embodiment of the present invention.

[0038] [Figure 9] FIG. 10 is a front view of a cylindrical battery cell crimping device according to a second embodiment of the present invention.

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

[0040] [Figure 11] 10 is a side view showing a state in which a measuring unit is raised by a certain distance in a cylindrical battery cell crimping device according to a second embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0041] 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.

[0042] Throughout the drawings, the same reference numerals are used 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.

[0043] Descriptions that limit or specify additional elements are applicable to all inventions and are not limited to a particular invention unless otherwise limited.

[0044] Throughout the description and claims of this invention, the singular includes the plural unless otherwise stated.

[0045] Throughout the description and claims, "or" includes "and" unless otherwise stated. Thus, "comprising A or B" means the three cases of including A, including B, or including both A and B.

[0046] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cylindrical battery crimping device equipped with a crimping pressure portion position measuring unit according to the present invention will now be described with reference to the accompanying drawings.

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

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

[0049] The upper body 100 is used to fix the cylindrical battery C and then perform crimping, and includes a crimping pressing portion 110 and a battery cell fixing portion 120.

[0050] The crimping presser 110 presses the cylindrical battery C to form a crimped portion. After the electrode assembly is placed inside the cylindrical battery, a top cap assembly is attached to the top, and a gasket is provided to perform crimping. The crimping presser 110 may be a piston-shaped pressing member, and a roller 115 may be disposed on the top of the crimping presser 110.

[0051] The rollers 115 include a moving roller 115A connected to the cam 200 and a pressing roller 115B for pressing the crimping pressing unit 110, and the moving roller 115A and the pressing roller 115B are configured to share the same central axis.

[0052] A measuring dog 117, which can serve as a reference for position measurement, is provided on one side of the central axis of the roller 115. The measuring dog 117 has a horizontally flat structure where the part to be measured is shaped like a plate, which makes position measurement easier and improves accuracy. Such a measuring dog 117 can be provided on each of the upper bodies 100 provided on the cam 200.

[0053] As shown in FIGS. 3 and 4, the battery cell fixing portion 120 is for fixing the cylindrical battery prior to pressing the cylindrical battery, and includes fixing jaws 125.

[0054] The fixing jaw 125 comes into direct contact with the cylindrical battery to secure it in place before compressing it. The fixing jaw 125 has a protrusion that protrudes and is inserted into the beading of the cylindrical battery. After the fixing jaw 125 moves forward toward the cylindrical battery, the protrusion is inserted into the beading to secure the cylindrical battery in place.

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

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

[0057] The electrode assembly is a jelly-roll type electrode assembly manufactured by interposing a separator between a long sheet-shaped positive electrode and a negative electrode and then winding the electrode assembly.

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

[0059] The positive electrode current collector may 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 in the battery. For example, stainless steel, aluminum, nickel, titanium, calcined carbon, or aluminum or stainless steel surface-treated with carbon, nickel, titanium, silver, etc. may be used. Furthermore, to enhance the adhesive strength of the positive electrode active material, the surface may be finely textured, or various forms such as a film, sheet, foil, net, porous material, foam, or nonwoven fabric may be used.

[0060] Positive electrode active materials include layered compounds such as lithium cobalt oxide (LiCoO2), lithium nickel oxide (LiNiO2), or compounds substituted with higher transition metals; 1+x Mn 2-x Lithium manganese oxides such as LiMnO4 (where x is 0 to 0.33), LiMnO3, LiMn2O3, and LiMnO2; lithium copper oxide (Li2CuO2); vanadium oxides such as LiV3O8, V2O5, and Cu2V2O7; and the chemical formula LiNi 1-xNi-site type lithium nickel oxide represented by 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 composite oxides expressed as Li2Mn3MO8 (where M = Co, Ni, Fe, Cr, Zn, or Ta, and x = 0.01 to 0.1); LiMn2O4, in which part of the Li in the chemical formula is replaced by an alkaline earth metal ion; disulfide compounds; Fe2(MoO4)3, LiNi x Mn 2-x O4 (0.01≦x≦0.6) can be used.

[0061] On the other hand, a conductive material and a binder can be mixed into the positive electrode active material, and a filler can also be added if necessary.

[0062] The conductive material is typically added in an amount of 1 to 50 wt % based on the total weight of the mixture including the positive electrode active material. Such a conductive material is not particularly limited as long as it is conductive without causing chemical changes in the battery. Examples of such a conductive material include graphite such as natural graphite and 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 to the conductive material and to the current collector, and is typically added in an amount of 1 to 50 wt % based on the total weight of the mixture including the positive electrode active material 120. Examples of such binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene, polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene-butylene rubber, fluororubber, and various copolymers.

[0064] Meanwhile, the positive electrode tab, which is connected to the uncoated portion of the positive electrode and 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 applied to 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 is conductive and does not cause chemical changes in the battery. For example, copper, stainless steel, aluminum, nickel, titanium, baked carbon, copper stainless steel whose surface is treated with carbon, nickel, titanium, silver, or the like, aluminum cadmium alloy, etc. can be used.

[0067] In addition, the bonding strength of the negative electrode active material can be strengthened by forming minute irregularities on the surface, and various forms such as a film, sheet, foil, net, porous material, foam, nonwoven fabric, etc. can be used.

[0068] Examples of the negative electrode active material include carbon such as non-graphitizable carbon and graphite-based carbon; x Fe2O3(0≦x≦1), Li x WO2(0≦x≦1), Sn x Me 1-x Me' y O zMetal composite oxides such as (Me: Mn, Fe, Pb, Ge; Me': Al, B, P, Si, Group 1, Group 2, Group 3 elements of the periodic table, halogen; 0 < x ≤ 1; 1 ≤ y ≤ 3; 1 ≤ z ≤ 8); 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 such as Si, SiO, SiO2 alone or mixtures thereof can be used, but are not limited thereto.

[0069] Of course, a conductive material and a binder can be additionally mixed with 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 bind the negative electrode active material and the conductive material, etc., 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, fluoro rubber, polyvinyl alcohol, carboxymethyl cellulose (CMC), starch, hydroxypropyl cellulose, regenerated cellulose, polyvinyl alcohol (PVA), polyacrylic acid (PAA), polyethylene glycol (PEG), polyacrylonitrile (PAN), and polyacryl amide (PAM).

[0072] Meanwhile, the negative electrode tab, which is connected to the uncoated portion of the negative electrode and extends downward by a certain length, is electrically connected to the cylindrical battery case, more specifically, to the bottom surface.

[0073] The separator prevents short circuits between the cathode and the cathode and allows only the movement of lithium ions. The separator may be made of any one of polyethylene, polypropylene, a polyethylene / polypropylene double layer, a polyethylene / polypropylene / polyethylene triple layer, a polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper, but is not limited thereto.

[0074] Insulating members are located on 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 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 to seal the electrode assembly housed inside the cylindrical battery case.

[0076] Specifically, the cap assembly is formed by stacking a current interrupting member, a current interrupting gasket, a safety vent, a PTC element, and a top cap in this order from the bottom up, and crimping gaskets are positioned on the outer edges of the current interrupting member and the top cap.

[0077] The current interrupting member, also called a CID (Current Interrupt Device), is located on the top of the electrode assembly and has a positive electrode tab connected to a predetermined position on the bottom. For example, although the current interrupting member is shown as a flat plate in the drawings, it may also have a shape with a bulge in the center.

[0078] A safety vent with one or more notches is located on the top of the current interrupting member, with its center protruding downward. The safety vent interrupts current and releases gas when the internal pressure of the cylindrical battery case increases, and is positioned so that one side contacts the PTC element and the edge of the safety vent contacts the crimping gasket.

[0079] A current interruption gasket is positioned so as to maintain the current interruption member and the safety vent in an electrically insulated state, except for the downwardly protruding portions of the current interruption member and the safety vent.

[0080] The top cap, located at the top, seals the open upper end of the cylindrical battery case and forms a positive electrode terminal. One or more vent holes are formed in the top cap, so that if venting gas is generated inside the cylindrical battery case, it can be released to the outside to prevent explosion.

[0081] In the manufacture of a typical cylindrical battery, a crimping process and a beading process are performed to fix the cap assembly.

[0082] A crimping gasket is interposed on the outer edge, i.e., outer peripheral surface, of the current interrupting member, safety vent, PTC element, and top cap 250 to prevent these unit parts from being deformed or damaged during the crimping and beading processes, and to improve the adhesion between the current interrupting 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 examples thereof include polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), and perfluoroalkoxy (PFA).

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

[0085] As described above, the cylindrical battery case has a crimping portion at the top end that surrounds and seals the outer surface of the cap assembly, and a beading portion that recesses inward below the crimping portion, thereby firmly fixing the electrode assembly and cap assembly and protecting them from external impacts.

[0086] The cam 200 has a doughnut shape and can be driven to rotate. The cam 200 rotates together with the upper body 100 connected by the moving roller 115A, and moves the upper body 100 to a position for performing each step of the manufacturing process.

[0087] The manufacturing process performed by the upper body 100 moving to different positions due to the rotation of the cam 200 may include a process of accommodating a cylindrical battery, a process of fixing the cylindrical battery, a process of crimping the cylindrical battery to form a crimped portion, and a process of ejecting the cylindrical battery with the crimped portion formed.

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

[0089] The central support part 220 may be provided with a separate support rail (not shown) that allows the upper body 100 to move a predetermined distance apart along the circumferential direction of the central support part 220 in a vertical state.

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

[0091] The position measurement sensor 300A may be an eddy current sensor that uses eddy currents to measure the distance between objects or a laser sensor that measures distance by irradiating 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 is formed, and determines whether the cylindrical battery C on which the crimping portion is formed is good or bad.

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

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

[0095] The upper body 100 and cam 200 are the same as those in the cylindrical battery crimping device 10 according to the first embodiment of the present invention, so a description of the same components 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. Unlike the cam plate 230A of the cylindrical battery crimping device according to the first embodiment, the cam plate 230 has a separate through-hole 231 and further includes a measuring portion 400, a support shaft 500, a movement guide portion 600, and a support portion 700.

[0096] The cam plate 230 is a disk-shaped member located on the upper part of the central support part 220, and has a through-hole 231 formed therein through which the measuring part 400 is positioned.

[0097] 8, the position measuring sensor 300B measures the distance D from the position measuring sensor 300B to the top surface of the extension 420 to measure 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 is formed, and determines whether the cylindrical battery C on which the crimping portion is formed is good or bad.

[0098] The measuring unit 400 includes a contacting portion 410 that contacts the roller 115, and an extension portion 420 that is connected to the contacting portion 410 at one side and extends above the cam plate 230 through the through-hole 231 of the cam plate 230 at the other side.

[0099] The contact part 410 is in close contact with the roller 115 and can move up and down depending on the position of the roller 115, and the edge of the lower surface of the contact part 410 has a gently rounded shape to prevent damage due to collision when it comes into close contact with the roller 115 that moves horizontally.

[0100] The central portion of the contact portion 410, excluding the edge portion, is formed in a horizontally flat plate shape to prevent errors in the position of the roller 115 from occurring due to the contact portion when the roller 115 is in contact with the contact portion.

[0101] If the adhesive portion 410 must fit inside the through hole 231, the size of the through hole 231, or more precisely, the cross section, is formed larger than the cross section of the adhesive portion 410, and if the adhesive portion 410 does not need to fit inside the through hole 231, the cross section of the through hole 231 does not need to be formed larger than the cross section of the adhesive portion 410.

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

[0103] The extension 420 passes through the through hole 231 of the cam plate 230 and extends above the cam plate 230, so that the position is measured by the position measuring sensor 300B located above the cam plate 230 at a distance.

[0104] An incision is formed in the side of the central portion of the extension 420 by cutting a certain area.

[0105] The support shaft 500 is provided at an upper portion spaced apart from the cam plate 230 so that the position measuring sensor 300B can be positioned thereon. One side of the support shaft 500 is connected to the cam plate 230 and extends vertically, and the other side is connected to the position measuring sensor 300B to fix the position measuring sensor 300B.

[0106] The movement guide portion 600 is a member that is located on the side of the extension portion 420 located on the upper portion of the cam plate 230 and guides the extension portion 420 so that it can move vertically.

[0107] The moving guide unit 600 may be formed in the shape of a cylindrical rod and connected to the extension unit 420, so that the extension unit 420 moves along the rod, or may be formed in the shape of a rail and connected to the extension unit 420, so that the extension unit 420 moves along the rail.

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

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

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

[0111] Although specific portions of the contents of the present invention have been described in detail above, it will be apparent to those skilled in the art that such specific techniques are merely preferred embodiments and do not limit the scope of the present invention. It is obvious to those skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it goes without saying that such changes and modifications also fall within the scope of the accompanying claims. [Explanation of symbols]

[0112] 10 Crimping device

[0113] 100 upper fuselage

[0114] 110 Crimping pressure part

[0115] 115 Roller

[0116] 115A Moving Roller

[0117] 115B Pressure roller

[0118] 117 Measuring 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 Adhesion part

[0129] 420 Extension

[0130] 500 Support shaft

[0131] 520 Stopper

[0132] 600 Moving guide unit

[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 press portion; One or more of the upper bodies are arranged in a circle, and a cam rotates simultaneously with the upper bodies, A cylindrical battery crimping device including a position measuring sensor capable of measuring the height of the crimping press portion.

2. The upper body is a battery cell fixing portion disposed inside the upper body and to which a cylindrical battery cell is fixed; a crimping pressing unit that, after the cylindrical battery cell is fixed to the battery cell fixing unit, moves from top to bottom and presses the cylindrical battery cell to form a crimped portion on the cylindrical battery cell.

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

4. The cylindrical battery crimping device according to claim 1 , wherein a roller is disposed above the crimping presser, 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 cylindrical battery crimping device according to claim 4 , wherein the position measuring sensor measures the height of the measuring dog.

6. a cam plate located on the cam, having a fixed height and a through hole; The cylindrical battery crimping device according to claim 4 , further comprising: a measuring portion that is positioned in a state where it penetrates the through-hole, and whose position is measured by the position measuring sensor.

7. 7. The cylindrical battery crimping device of claim 6, wherein the measuring unit includes: a contact portion that contacts the roller; and an extension portion that is connected to the contact portion at one side and passes through the through hole at the other side to extend above the cam plate.

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

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

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

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

12. 12. The cylindrical battery crimping device according to claim 7, further comprising a support portion fixed to a side surface of the extension portion and supporting the extension portion so that it does not fall downward due to the cam plate.

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