Crimping apparatus for cylindrical battery, having position measurement part for crimp-pressing part

Abstract

The invention of the present application relates to a crimping apparatus for a cylindrical battery, the crimping apparatus having a position measurement part for a crimp-pressing part. More specifically, the present invention relates to a crimping apparatus for a cylindrical battery, the apparatus comprising: an upper body comprising a crimp-pressing part; and a cam on which one or more of the upper bodies are arranged in a circular shape and which rotates together with the upper bodies, wherein the crimping apparatus comprises a position measurement sensor capable of measuring the height of the crimp-pressing parts.

Description

Crimping device for cylindrical batteries with added crimping pressure position measuring section

[0001] This application claims the benefit of priority to Korean Patent Application No. 2023-0180135, filed December 12, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a crimping device for a cylindrical battery having an added crimping pressure portion position measuring unit. Specifically, the present invention relates to a crimping device for a cylindrical battery having an added crimping pressure portion position measuring unit, which can measure the position of a crimping pressure portion during a process of manufacturing a cylindrical battery cell, thereby reducing or preventing crimping defects.

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

[0004] These secondary batteries have diverse uses and require large amounts of energy, so they need to have high energy density. In the case of cylindrical battery cells, the can of the cylindrical battery cell is pressurized to reduce the volume, thereby improving the energy density.

[0005] Fig. 5 is a side view showing a portion of a crimping device for a cylindrical battery according to the prior art, and Fig. 6 is a front view showing a portion of a crimping device for a cylindrical battery according to the prior art. In particular, since the crimping device for a cylindrical battery according to the prior art does not have a separate position measuring means for the crimping pressurization portion, the relevant portion will be described with reference to Figs. 5 and 6.

[0006] As shown in FIGS. 5 and 6, the crimping device for a cylindrical battery includes a crimping pressurizing portion (110) for pressing the cylindrical battery and a cam plate (230A) positioned on the upper portion of the crimping pressurizing portion (110), and the crimping pressurizing portion (110) includes a roller (115) having a moving roller (115A) and a pressing roller (115B).

[0007] Among the crimping devices for cylindrical batteries according to the prior art, the crimping pressurizing unit (110) for pressing the cylindrical battery simply performs crimping by the movement and pressing of the moving roller (115A) and the pressurizing roller (115B). As such, there is no separate means for identifying the position where crimping is performed, and thus, crimping defects occur due to positional errors in the crimping pressurizing unit (110), but since this cannot be accurately identified, the problem cannot be improved.

[0008] Patent Document 1 is a device for manufacturing a cylindrical battery by caulking the outer peripheral portion of the upper portion of a cylindrical battery casing, and does not have a member for measuring the position of the pressurized portion when the cylindrical battery casing is pressurized in a 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 pressurization portion.

[0010] The manufacturing process of cylindrical batteries is carried out sequentially and automatically at each step by a cam-type rotating process. If a defect occurs in a specific sequence, the defect rate can be significantly reduced by responding preemptively. In the crimping process, crimping is carried out as the crimping pressure part moves downward by the pressure applied by the pressure roller (115B). Before crimping, the cylindrical battery is fixed by the battery cell fixing part, and the crimping pressure part descends to perform crimping. Therefore, by identifying the final descending position of the crimping pressure part, it is easy to determine whether there is a defect in the entire crimping process. Despite this, the prior art appears to have simply continued to operate only mechanical manufacturing equipment and failed to recognize the need to measure or improve this point.

[0011] (Prior art literature)

[0012] U.S. Patent Publication No. 5,772,704 (Patent Document 1)

[0013] Republic of Korea Publication of Utility Model No. 2012-0004056 ('Patent Document 2')

[0014] Republic of Korea Utility Model Publication No. 0485904 ('Patent Document 3')

[0015] Republic of Korea Patent Publication No. 1075879 ('Patent Document 4')

[0016] In order to solve the above problems, the present invention provides a cylindrical battery crimping device having a crimping pressure portion position measuring portion added thereto, which can reduce or prevent crimping defects occurring in the crimping pressure portion in the cylindrical battery crimping device.

[0017] In order to solve the above-described problem, a crimping device for a cylindrical battery according to the present invention comprises an upper body (100) including a crimping pressure part (110), a cam (200) in which one or more of the upper bodies (100) are arranged in a circular shape and rotate simultaneously with them, and a position measuring sensor (300) capable of measuring the height of the crimping pressure part (110).

[0018] In the crimping device for a cylindrical battery according to the present invention, the upper body (100) includes a battery cell fixing part (120) that is disposed inside the upper body (100) and to which a cylindrical battery cell is fixed, and a crimping pressurizing part (110) that moves from the top to the bottom to apply pressure after the cylindrical battery cell is fixed to the battery cell fixing part (120) to create a crimping part on the cylindrical battery cell.

[0019] 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.

[0020] In the crimping device for a cylindrical battery according to the present invention, a roller (115) is arranged on the upper portion of the crimping pressurizing portion (110), and the position measuring sensor (300) measures the position of the roller (115).

[0021] In the crimping device for a cylindrical battery according to the present invention, a measuring dog (117) for position measurement is added to the central axis of the roller (115), and the position measuring sensor (300A) measures the height of the measuring dog (117).

[0022] In the crimping device of the cylindrical battery according to the present invention, a cam plate (230) positioned on the upper portion of the cam (200) and having a fixed height and a through hole (231) formed therein is included, and a measuring unit (400) positioned so as to penetrate the through hole (231) and whose position is measured by the position measuring sensor (300B).

[0023] In the crimping device for a cylindrical battery according to the present invention, the measuring part (400) includes a contact part (410) that is in contact with the roller (115) and an extension part (420) that is connected at one end to the contact part (410) and has the other end extending to the upper portion of the cam plate (230) by penetrating the through hole (231).

[0024] In the crimping device for a cylindrical battery 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).

[0025] In the crimping device for a cylindrical battery according to the present invention, a movement guide part (600) that guides the movement of the measuring part (400) is provided on the side of the extension part (420).

[0026] In the crimping device for a cylindrical battery according to the present invention, the position measuring sensor (300B) is an eddy current sensor.

[0027] In the crimping device of a cylindrical battery 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).

[0028] In the crimping device of a cylindrical battery according to the present invention, a support member (700) is provided that is fixed on the side of the extension member (420) and supports the extension member (420) so that it does not fall downward by the cam plate (230).

[0029] The present invention can also be provided in a form in which various means for solving the above problem are combined.

[0030] The present invention comprises a measuring unit capable of measuring the vertical position of the crimping pressure member, thereby reducing or preventing crimping defects occurring in the crimping pressure member. Furthermore, the present invention can determine whether each individual upper body is defective or abnormal, allowing for easy repair or replacement of any defective portion.

[0031] FIG. 1 is a perspective view showing a crimping device for a cylindrical battery according to a first embodiment of the present invention.

[0032] Fig. 2 is a perspective view showing a crimping device for a cylindrical battery according to a second embodiment of the present invention.

[0033] Figure 3 is a schematic diagram of a battery cell fixing part according to the present invention.

[0034] Figure 4 is a schematic diagram showing a cylindrical battery cell being fixed using a battery cell fixing part according to the present invention.

[0035] Fig. 5 is a side view showing a part of a crimping device for a cylindrical battery according to the prior art.

[0036] Fig. 6 is a front view showing a portion of a crimping device for a cylindrical battery according to the prior art.

[0037] Fig. 7 is a side view of the position measuring unit of the first embodiment of the present invention.

[0038] Fig. 8 is a side view showing a crimping device for a cylindrical battery according to a second embodiment of the present invention.

[0039] FIG. 9 is a front view of a cylindrical battery cell crimping device according to a second embodiment of the present invention.

[0040] Fig. 10 is a side view showing a state in which a measuring part is lowered a certain distance in a crimping device for a cylindrical battery cell according to a second embodiment of the present invention.

[0041] Fig. 11 is a side view showing a state in which a measuring part is raised a certain distance in a crimping device for a cylindrical battery cell according to a second embodiment of the present invention.

[0042] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail, so that those skilled in the art can easily implement the present invention. When describing the operating principles of the embodiments of the present invention in detail, detailed descriptions of known functions or components will be omitted if they are deemed to unnecessarily obscure the gist of the present invention.

[0043] Parts with similar functions and actions are designated by the same drawing reference numerals 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 otherwise specifically stated, but rather implies the inclusion of additional components.

[0044] The description that concretizes or adds to the components may be applied to all inventions unless there is a special limitation, and is not limited to the description of a specific invention.

[0045] Throughout the description and claims of the invention herein, the singular includes the plural unless otherwise stated.

[0046] 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.

[0047] Hereinafter, a crimping device for a cylindrical battery with an added crimping pressure portion position measuring portion according to the present invention will be described with reference to the attached drawings.

[0048] FIG. 1 is a perspective view showing a crimping device for a cylindrical battery 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 a state of fixing a cylindrical battery cell using a battery cell fixing part according to the present invention, and FIG. 7 is a side view of a position measuring part according to the first embodiment of the present invention.

[0049] Referring to FIGS. 1, 3, 4, and 7, a crimping device (10) for a cylindrical battery according to a first embodiment of the present invention comprises an upper body (100), a cam (200), and a position measuring sensor (300A).

[0050] The upper body (100) fixes a cylindrical battery (C) and then performs crimping, and includes a crimping pressurizing part (110) and a battery cell fixing part (120).

[0051] The crimping pressurizing unit (110) is used to pressurize a cylindrical battery (C) to form a crimping unit. After the electrode assembly is housed inside the cylindrical battery, a top cap assembly is mounted on top, and a gasket is added to perform crimping. The crimping pressurizing unit (110) may be a pressing member having a piston structure, and a roller (115) may be arranged on the upper portion of the crimping pressurizing unit (110).

[0052] The roller (115) is configured to include a moving roller (115A) connected to the cam (200) and a pressure roller (115B) for pressing the crimping pressure part (110), and the moving roller (115A) and the pressure roller (115B) are provided to share the same central axis.

[0053] A measuring dog (117) that can serve as a reference for position measurement is attached to one side of the central axis of the roller (115). The measuring dog (117) may have a structure in which the measured portion is formed in a horizontal flat shape, and this structure facilitates position measurement and improves accuracy. Such a measuring dog (117) may be attached to each upper body (100) provided in the cam (200).

[0054] The battery cell fixing part (120) is for fixing the cylindrical battery before pressurizing the cylindrical battery, as shown in FIGS. 3 and 4, and includes a fixing jaw (125).

[0055] The fixing jaw (125) is fixed by directly contacting the cylindrical battery before pressurizing the cylindrical battery. The fixing jaw (125) is formed with a protruding portion that is inserted into the beading portion of the cylindrical battery. After the fixing jaw (125) advances toward the cylindrical battery, the protruding portion is inserted into the beading portion to fix the cylindrical battery.

[0056] The cylindrical battery (C) is fixed by the battery cell fixing member (120) and then the crimping pressurizing member (110) applies pressure to form a crimping member.

[0057] The cylindrical battery (C) comprises an electrode assembly, a cap assembly, and a cylindrical battery case housing them.

[0058] Regarding the electrode assembly, the electrode assembly is a jelly-roll type electrode assembly in which a separator is interposed between long sheet-shaped positive and negative electrodes and then rolled up.

[0059] The positive electrode is composed of a positive electrode current collector and a positive electrode active material applied to the upper and lower surfaces of the positive electrode current collector.

[0060] The positive electrode current collector can generally have a thickness of 3 to 500 μm. There are no particular limitations on the material as long as it has high conductivity and does not cause 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. can be used. In addition, in order to increase the adhesive strength of the positive electrode active material, the surface can be formed with fine irregularities, or various shapes such as films, sheets, foils, nets, porous bodies, foams, and non-woven bodies are possible.

[0061] The cathode active material is a layered compound such as lithium cobalt oxide (LiCoO2), lithium nickel oxide (LiNiO2), or a compound substituted with a transition metal of higher order; 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-x M x Ni-site type lithium nickel oxide represented by O2 (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 by 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 in which some 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) etc. can be used.

[0062] Meanwhile, the positive electrode active material may be mixed with a conductive agent and a binder, and fillers may be added as needed.

[0063] The conductive agent 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. The conductive agent is not particularly limited as long as it has conductivity and does not cause a chemical change in the battery. For example, graphite such as natural graphite or artificial graphite; carbon black such as carbon black, acetylene black, Ketjen black, channel black, furnace black, lamp black, summer black; conductive fibers such as carbon fiber or metal fiber; metal powders such as fluorocarbon, aluminum, and nickel powder; conductive whiskey such as zinc oxide or potassium titanate; conductive metal oxides such as titanium oxide; and conductive materials such as polyphenylene derivatives can be used.

[0064] A binder is a component that assists in the bonding of the positive electrode active material and the conductive material and the bonding 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. 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.

[0065] Meanwhile, the positive electrode tab, which is extended upwards by a certain length after being connected to the positive electrode's non-conductive portion, is electrically connected to the cap assembly.

[0066] The negative electrode is composed of a negative electrode current collector and a negative electrode active material applied to the lower and upper surfaces of the negative electrode current collector.

[0067] The negative electrode current collector is typically made to have a thickness of 3 to 500 μm. There are no particular limitations on the negative electrode current collector as long as it is conductive and does not cause chemical changes in the battery. For example, copper, stainless steel, aluminum, nickel, titanium, calcined carbon, copper or stainless steel surface-treated with carbon, nickel, charcoal, silver, etc., aluminum-cadmium alloy, etc. can be used.

[0068] In addition, the bonding strength of the negative electrode active material can be strengthened by forming fine irregularities on the surface, and it can be used in various forms such as films, sheets, foils, nets, porous bodies, foams, and non-woven fabrics.

[0069] Examples of negative active materials include carbon such as non-graphitizable carbon and graphitic 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, elements of group 1, 2, and 3 of the periodic table, halogens; 0 <x≤1; 1≤y≤3; 1≤z≤8) 등의 금속 복합 산화물; 리튬 금속; 리튬 합금; 규소계 합금; 주석계 합금; SnO, SnO2, PbO, PbO2, Pb2O3, Pb3O4, Sb2O3, Sb2O4, Sb2O5, GeO, GeO2, Bi2O3, Bi2O4, Bi2O5등의 금속 산화물; 폴리아세틸렌 등의 도전성 고분자; Li-Co-Ni계 재료; Si, SiO, SiO2단독 또는 이들의 혼합물인 Si계 등을 사용할 수 있으나, 이들만으로 한정되는 것은 아니다.

[0070] 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.

[0071] Conductive agents are components for further improving the conductivity of the negative electrode active material, and may be used in a certain ratio, including carbon black such as acetylene black, Ketjen black, channel black, furnace black, lamp black, and thermal black; conductive fibers such as carbon fibers or metal fibers; metal powders such as fluorinated carbon, aluminum, and nickel powders; conductive whiskies such as zinc oxide and potassium titanate; conductive metal oxides such as titanium oxide; and conductive materials such as polyphenylene derivatives.

[0072] The binder is a component that helps in the binding of the negative electrode active material and the conductive material and the binding 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).

[0073] Meanwhile, the negative tab, which is extended downwards by a certain length after being connected to the negative electrode's non-conductive portion, is electrically connected to the cylindrical battery case, more specifically, to the bottom surface.

[0074] The separator prevents shorting between the aforementioned negative electrode and positive electrode and only allows the movement of lithium ions. The material of the separator is preferably one selected from among polyethylene, polypropylene, polyethylene / polypropylene double layer, polyethylene / polypropylene / polyethylene triple layer, polypropylene / polyethylene / polypropylene triple layer, and organic fiber filter paper, but is not limited thereto.

[0075] An insulating member may be positioned on the upper and lower portions of the electrode assembly housed in the cylindrical battery case, and the insulating member serves to insulate between the electrode assembly and the cap assembly, and between the electrode assembly and the cylindrical battery case.

[0076] The cap assembly is positioned on top of the electrode assembly and is electrically connected to the positive tab of the electrode assembly, and is coupled to the upper open end of the cylindrical battery case to seal the electrode assembly housed inside the cylindrical battery case.

[0077] Specifically, the cap assembly comprises a current blocking member, a current blocking gasket, a safety vent, a PTC element, and a top cap sequentially stacked from the bottom, and a crimping gasket is positioned on the outer edges of the current blocking member and the top cap.

[0078] The current interrupting member, also called a current interrupt device (CID), is located on the upper portion of the electrode assembly and has a positive tab connected to a predetermined position on its lower surface. Although the drawing shows the current interrupting member as having a flat shape, it may also have a shape with a central portion convex upward.

[0079] A safety vent with one or more notches is positioned on the upper portion of the current-blocking member, with the center portion protruding downward. The safety vent interrupts the current and exhausts gas when the pressure inside the cylindrical battery case increases. One side of the safety vent is positioned to contact the PTC element, and the edge end surface is positioned to contact the crimping gasket.

[0080] The current interrupting gasket is positioned so that the current interrupting member and the safety vent remain electrically insulated, except for the downward protruding portion of the current interrupting member and the safety vent.

[0081] The top cap located at the top seals the upper open end of the cylindrical battery case and forms a positive terminal, and one or more venting holes are formed in the top cap so that when venting gas is generated inside the cylindrical battery case, it can be released to the outside to prevent an explosion.

[0082] A typical cylindrical battery undergoes a crimping process and a beading process to secure the cap assembly.

[0083] A crimping gasket is interposed on the edges, i.e., the outer surface, of the current blocking member, safety vent, PTC element, and top cap (250) to prevent these unit parts from being deformed or damaged during the crimping process and beading process, and to improve the sealing between the current blocking member and the top cap.

[0084] Here, the crimping gasket is not particularly limited as long as it is a material having a certain elasticity and durability, and may be, for example, polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), or perfluoroalkoxy (PFA).

[0085] The cylindrical battery case accommodates the electrode assembly and the cap assembly, and a negative tab extends downward and is connected to the bottom of the cylindrical battery case body so that the bottom of the cylindrical battery case body can act as a negative electrode.

[0086] As described above, the cylindrical battery case has a crimping portion provided at the upper end to seal and wrap the outer side of the cap assembly, and an indented beading portion provided below the crimping portion to firmly fix the electrode assembly and the cap assembly while protecting them from external impacts, etc.

[0087] The cam (200) is capable of rotating in a donut shape and rotates together with the upper body (100) connected by the moving roller (115A), thereby moving the upper body (100) to a position where each step of the manufacturing process is performed.

[0088] The upper body (100) moves according to the rotation of the cam (200), and the manufacturing process performed at each position may be a process of storing a cylindrical battery, a process of fixing a cylindrical battery, a process of forming a crimping portion by crimping a cylindrical battery, and a process of discharging a cylindrical battery with a crimping portion formed thereon.

[0089] The cam (200) is located on the upper part of the cam support (210), and a cylindrical central support (220) is provided in the center of the cam support (210), and a disc-shaped cam plate (230A) is provided on the upper surface of the central support (220).

[0090] The central support (220) may be provided with a separate support rail (not shown in the drawing) that allows the upper body (100) to move a certain distance apart along the circumference of the central support (220) in a vertical state.

[0091] The position measuring sensor (300A) is provided at the bottom of the cam plate (230A) to measure the vertical position of the crimping pressurizing portion (110) and check for abnormalities in the crimping pressurizing portion (110). Specifically, a measuring dog (117) for position measurement is added to the central axis of the roller (115), and the position measuring sensor (300A) measures the height of the measuring dog (117).

[0092] 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 the 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 pressurizing portion (110).

[0093] The position measurement sensor (300A) measures the height of the crimping pressure part (110) after the crimping part is formed to determine whether the cylindrical battery (C) in which the crimping part is formed is defective.

[0094] FIG. 2 is a perspective view showing a crimping device for a cylindrical battery 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 a state of fixing a cylindrical battery cell using a battery cell fixing part according to the present invention, FIG. 8 is a side view showing a crimping device for a cylindrical battery according to a second embodiment of the present invention, FIG. 9 is a front view of a cylindrical battery cell crimping device according to a second embodiment of the present invention, FIG. 10 is a side view showing a state in which a measuring part is lowered by a certain distance in a cylindrical battery cell crimping device according to a second embodiment of the present invention, and FIG. 11 is a side view showing a state in which a measuring part is raised by a certain distance in a cylindrical battery cell crimping device according to a second embodiment of the present invention.

[0095] This will be described with reference to FIGS. 1, 3, 4, and 8 to 11. A crimping device for a cylindrical battery according to a second embodiment of the present invention comprises 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).

[0096] Since the upper body (100) and cam (200) are the same as those of the crimping device (10) for a cylindrical battery according to the first embodiment of the present invention, a description of the same configuration will be omitted. The crimping device for a cylindrical battery according to the second embodiment is not provided with a measuring dog (117), and also has a different position of the position measuring sensor (300B). Unlike the cam plate (230A) of the crimping device for a cylindrical battery 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).

[0097] The cam plate (230) is in the shape of a disc located on the upper part of the central support (220), and has a through hole (231) formed therein through which the measuring part (400) passes.

[0098] As shown in Fig. 8, the position measuring sensor (300B) positioned can measure the distance (D) from the position measuring sensor (300B) to the upper surface of the extension (420) to measure the position of the crimping pressurization part (110). The position measuring sensor (300B) measures the height of the crimping pressurization part (110) after the crimping part is formed to determine whether the cylindrical battery (C) in which the crimping part is formed is defective.

[0099] The measuring part (400) includes a contact part (410) that is in close contact with the roller (115) and an extension part (420) that is connected on one side to the contact part (410) and has the other side extending to the upper part of the cam plate (230) by penetrating the through hole (231) of the cam plate (230).

[0100] The contact portion (410) is in contact with the roller (115) and can move up and down depending on the position of the roller (115). The edge portion of the lower surface of the contact portion (410) has a gentle round shape to prevent damage by collision when in contact with the roller (115) moving in the horizontal direction.

[0101] The central part, excluding the edge part of the contact part (410), is formed in a flat shape in a horizontal direction. This is to prevent errors from occurring depending on the position of the roller (115) when contacting the roller (115) depending on the contact part.

[0102] If the sealing portion (410) is to be inserted into the through hole (231), the size of the through hole (231), more precisely, the cross-section, is formed to be larger than the cross-section of the sealing portion (410). If the sealing portion (410) does not have to be inserted into the through hole (231), the cross-section of the through hole (231) does not need to be formed to be larger than the cross-section of the sealing portion (410).

[0103] For example, in order to prevent the sealing portion (410) from rising excessively and protruding to the upper portion of the cam plate (230) by passing through the through hole (231), the cross-section of the through hole (231) may be formed narrower than the cross-section of the sealing portion (410).

[0104] The extension (420) extends to the upper portion of the cam plate (230) by penetrating the through hole (231) of the cam plate (230), so that the position is measured by the position measurement sensor (300B) located spaced apart from the upper portion of the cam plate (230).

[0105] A cut-out portion is formed in a certain area on the central side of the extension portion (420).

[0106] The support shaft (500) is provided so that a position measurement sensor (300B) can be positioned at an upper portion spaced apart from the cam plate (230). One side is connected to the cam plate (230) and extends vertically, and the other side is connected to the position measurement sensor (300B) to fix the position measurement sensor (300B).

[0107] The moving guide member (600) is a member located on the side of the extension member (420) located on the upper side of the cam plate (230) and guides the extension member (420) to move in the vertical direction.

[0108] The moving guide part (600) may be formed in a cylindrical rod shape and connected to the extension part (420) so that the extension part (420) moves along the rod shape, or may be formed in a rail shape and connected to the extension part (420) so that the extension part (420) moves along the rail.

[0109] The support member (700) may be positioned so that one side is fixed to the upper surface of the cam plate (230), and the other side may be shaped to extend in a horizontal direction, and a portion of the extended other side of the support member (700) may be positioned so as to be inserted in the direction of the cut formed on the side of the extension member (420).

[0110] The support member (700) is inserted in the direction of the cut formed on the side of the extension member (420), thereby preventing the extension member (420) from falling to the bottom of the cam plate (230).

[0111] The position measuring sensor (300B) is provided with a separate stopper (520) fixed to the support shaft (500) on the side to prevent the position measuring sensor (300B) from making direct contact with the upper surface of the extension part (420).

[0112] As described above, specific parts of the present invention have been described in detail. To a person having ordinary skill in the art, such specific descriptions are merely preferred embodiments, and the scope of the present invention is not limited thereby. It is obvious to a person skilled in the art that various changes and modifications are possible within the scope and technical idea of ​​the present invention, and it is natural that such changes and modifications fall within the scope of the appended patent claims.

[0113] (Explanation of symbols)

[0114] 10: Crimping device

[0115] 100: Upper body

[0116] 110: Crimping pressurized part

[0117] 115: Roller

[0118] 115A: Moving roller

[0119] 115B: Pressure roller

[0120] 117: Measuring Dog

[0121] 120: Battery cell fixing part

[0122] 125: Fixed jaw

[0123] 200: Cam

[0124] 210: Cam support

[0125] 220: Central support

[0126] 230, 230A: Cam Plate

[0127] 231: Through hole

[0128] 300, 300A, 300B: Position measuring sensor

[0129] 400: Measurement section

[0130] 410: Adhesive

[0131] 420: Extension

[0132] 500: Support axis

[0133] 520: Stopper

[0134] 600: Moving Guide Section

[0135] 700: Support

[0136] C: Cylindrical battery cell

[0137] D: Distance from the position measurement sensor to the upper surface of the extension

Claims

1. Upper body including a crimping pressurization part; In a crimping device for a cylindrical battery, wherein one or more of the upper bodies are arranged in a circular shape and a cam is rotated simultaneously with them; A crimping device for a cylindrical battery including a position measuring sensor capable of measuring the height of the crimping pressurization portion.

2. In paragraph 1, The above upper body, A battery cell fixing part arranged inside the upper body and to which a cylindrical battery cell is fixed; A crimping device for a cylindrical battery, comprising: a crimping pressurizing unit that applies pressure from top to bottom to create a crimping unit on the cylindrical battery cell after the cylindrical battery cell is fixed to the battery cell fixing unit.

3. In paragraph 2, The above battery cell fixing part is a crimping device including a fixing jaw that fixes the beading part of the cylindrical battery cell.

4. In paragraph 1, A cylindrical battery crimping device in which a roller is arranged on the upper part of the crimping pressurizing portion, and the position measuring sensor measures the position of the roller.

5. In paragraph 4, A measuring dog for position measurement is added to the central axis of the above roller, The above position measuring sensor is a crimping device of a cylindrical battery that measures the height of the measuring dog.

6. In paragraph 4, A cam plate positioned on the upper part of the cam, having a fixed height and having a through hole formed therein; A crimping device for a cylindrical battery including a measuring unit positioned so as to penetrate the through hole and whose position is measured by the position measuring sensor.

7. In paragraph 6, The above measuring part is a crimping device for a cylindrical battery including a contact part that is in close contact with the roller and an extension part whose one side is connected to the contact part and whose other side penetrates the through hole and extends to the upper part of the cam plate.

8. In paragraph 6, A crimping device for a cylindrical battery having a support shaft for supporting the position measuring sensor on the upper surface of the cam plate.

9. In paragraph 7, A crimping device for a cylindrical battery, wherein a movement guide section for guiding the movement of the measuring section is provided on the side of the above extension section.

10. In paragraph 6, The above position measuring sensor is a crimping device for a cylindrical battery, which is an eddy current sensor.

11. In paragraph 7, The above position measuring sensor is a crimping device for a cylindrical battery that measures the distance from the above position measuring sensor to the upper surface of the extension.

12. In paragraph 10, A crimping device for a cylindrical battery, the crimping device having a support member fixed to the side of the extension member to prevent the extension member from falling downwards by the cam plate.

Images