KR20150089463A - Device for Manufacturing Battery Cell Having Means for Applying Curing Material - Google Patents

Abstract

The present invention relates to a device for manufacturing a battery cell, comprising: a first jig for pressurizing one side of the battery cell and a second jig for pressurizing the other side of the battery cell, with respect to a direction in which an electrode terminal is formed; a base plate having the first and the second jig mounted on an upper surface thereof, and having a guide unit to induce movement of the first and the second jig to the battery cell side formed on at least one of one end portion and the opposite end portion; an injector for applying a curable material to a side surface portion of the battery cell pressurized by the first and the second jig; and at least one fixing member for fixating the first and second jigs in positions with respect to the base plate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a device for manufacturing a battery cell having a curing material adding means,

The present invention relates to a battery cell manufacturing apparatus provided with a curing material adding means.

The secondary battery, which has recently been used in an increasing amount, has a high demand for a prismatic secondary battery and a pouch-type secondary battery that can be applied to products such as mobile phones with a thin thickness in terms of the shape of the battery. , Lithium secondary batteries, lithium ion batteries, and the like, which have advantages such as high output stability and output stability.

Also, the secondary battery is classified according to how the electrode assembly having the anode / separator / cathode structure is formed. Typically, the long battery-shaped anodes and cathodes are jelly- A stacked (stacked) electrode assembly in which a plurality of positive electrodes and negative electrodes cut in units of a predetermined size are sequentially stacked with a separator interposed therebetween, a stacked (stacked) electrode assembly in which a predetermined unit of positive and negative electrodes are stacked, A stack / folding type electrode assembly in which a Bi-cell or a full cell stacked in a single state is wound up as a separation film can be given.

Recently, a pouch-shaped battery having a structure in which a stacked or stacked / folded electrode assembly is embedded in a pouch-shaped battery case of an aluminum laminate sheet is attracting much attention due to low manufacturing cost, small weight, Its usage is also gradually increasing.

FIG. 1 schematically shows a general structure of a typical conventional pouch-type secondary battery as an exploded perspective view.

1, the pouch type secondary battery 10 includes an electrode assembly 30, electrode taps 40 and 50 extending from the electrode assembly 30, electrodes 40 and 50 welded to the electrode taps 40 and 50, And a battery case 20 that houses the leads 60 and 70 and the electrode assembly 30. The upper and lower portions of the electrode leads 60 and 70 are sealed with the battery case 20 At the same time, an insulating film 80 is attached to ensure an electrically insulated state.

In such a pouch-shaped battery, the electrode assembly is housed in a laminate sheet, and an electrolyte is injected to seal the electrode assembly by thermal fusion or the like. In the step of sealing the electrode assembly, There is a problem in that it is difficult to maintain a complete sealing state even after the heat fusion is performed due to excessive melting phenomenon and / or protrusion of the inner resin layer due to the pressurization, so that penetration of moisture is easy and there is a possibility of leakage of the electrolytic solution.

Therefore, in the prior art, the metal layer is exposed at the end of the laminate sheet, which is the battery case of the pouch type battery, and the insulation breakdown phenomenon may occur. Therefore, by using a PET label or tape on the outer periphery of the heat- Discloses a battery that attempts to insulate the battery. However, when the outer periphery of the heat-sealed portion is insulated by using a PET label or a tape, there is a risk that the label and the tape are peeled off and the metal layer is still exposed to the outside to cause a short, Defects such as air bubbles or wrinkles occur.

Recently, there has been disclosed a pouch-type battery in which the sealing performance is enhanced by applying a sealing adjuvant to the outside of the heat-sealing portion. However, a sealing auxiliary agent having a predetermined viscosity and fluidity is finely applied to the outside of the heat- There is a problem that the operation is not easy.

In addition, since the battery case of the pouch type battery is generally made of a flexible material, when the battery is fixed for applying the sealing auxiliary material, the battery can have a tolerance for the full width dimension of each battery, Therefore, it has been difficult to add the sealing adjuvant precisely to the portion requiring complete sealing, which is problematic in that the effect of improving the sealing property is deteriorated.

Therefore, there is a high demand for development of a battery cell manufacturing apparatus which can solve the problem of poor sealing property of the pouch type battery which can not be solved by the above-mentioned conventional techniques, and which can enhance the safety of the battery.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art and the technical problems required from the past.

The inventors of the present application have conducted intensive research and various experiments. As described later, when a battery cell manufacturing apparatus of a novel structure is used, the position of a sealing portion on both sides of a battery cell requiring addition of a curable material It is possible to perform a precise addition operation, thereby improving the sealing ability of the battery and preventing short-circuiting caused by the exposure of the metal layer of the battery case, thereby completing the present invention.

According to an aspect of the present invention, there is provided an apparatus for manufacturing a battery cell,

A first jig for pressing one side of the battery cell based on a direction in which the electrode terminal is formed and a second jig for pressing the other side of the battery cell;

A base plate on which the first jig and the second jig are mounted on an upper surface and in which a guide for guiding movement of the first jig and the second jig toward the battery cell is formed on at least one of the one end and the opposite end;

An injector for adding a curable material to a side surface portion of the battery cell pressed by the first jig and the second jig; And

At least one fixing member for fixing the first and second jigs to the base plate in a fixed position;

And a control unit.

In one specific example, the battery cell may be a plate-shaped battery cell in which an electrode assembly is embedded in a battery case of a laminate sheet including a resin layer and a metal layer, and the outer circumferential surface of the battery cell includes a sealing part .

The first side sealing portion and the second side sealing portion, which are respectively adjacent to the sealing portions where the electrode terminals of the battery cell are located, may be pressed by the first and second jigs in a state of being bent upward.

That is, in the battery cell of the present invention, the first side sealing portion and the second side sealing portion protruding from both sides are vertically bent to form the shape of the battery cell close to a hexahedron, thereby minimizing the volume of the battery. It is easy to mount on the device.

At this time, the curable material may be added in a form of applying the end portions of the first side sealing portion and the second side sealing portion. According to the inventors of the present application, the pouch-shaped battery cell made of the flexible material as described above, The tolerance of the width of the battery cell ranges from 0.3 mm or more to 0.5 mm or less depending on the extent to which the side sealing portion of the battery cell is bent. Accordingly, the position of the sealing portion on the side of the battery requiring the addition of the curable material is not constant There is a problem in that it is difficult to add a hardenable substance to an accurate position.

The size of the battery cell width refers to a size corresponding to the distance between the end portions of the two sealing portions on both sides of the battery cell in a state where the sealing portion formed on both sides of the battery cell is formed by bending,

As a result of intensive researches, both sides of the battery cell are simultaneously pressed by the first jig and the second jig based on the direction in which the electrode terminals are formed, as in the present invention, When the two jigs are fixed in place by one or more fixing members on the base plate, both side surfaces of the battery cell are pressed without tolerance of the width of the battery cell, so that the curing material can be added in a state where the size of the battery cell is minimized Since the influence of the tolerance of the width size of the battery cells is minimized and the positions of the sealing portions on both sides of the battery cell requiring the addition of the curable material are made constant, precise addition work becomes possible, In addition, it was confirmed that the dielectric breakdown phenomenon caused by the exposure of the metal layer of the battery case can be prevented.

Therefore, the battery cell manufacturing apparatus according to the present invention includes the first jig and the second jig capable of pressing the battery cell at a distance that minimizes the width of the battery cell within a range in which the battery cell is not damaged, The battery cells pressed by the first jig and the second jig may have no tolerance in the width direction.

Here, when the widths of the battery cells are minimized, the widths of the battery cells are minimized when both side surfaces of the sample battery cells are pressed by the first jig and the second jig, Quot; means the distance between the first jig and the second jig in a state of being separated from each other.

In addition, a stopper (not shown) for restricting movement of the jig in the direction of the battery cell may be provided at the ends of the first and second jigs so that the first and second jigs can press both sides of the battery cell at more precise positions a stopper may be formed.

The stopper may have a structure in which the jig body is bent downward so as to be caught by the end of the base plate in the process of moving the first jig and the second jig toward the battery cell, The first jig and the second jig may have a structure in which the upper surface and the side surface of the base plate are enclosed, for example, in a cross-sectional shape.

Meanwhile, in one specific example, at least one through-hole is drilled in each of the first and second jigs, a groove corresponding to the through-hole is formed in the base plate, and the through- The first jig and the second jig can be fixed in position with respect to the base plate.

At this time, the through-holes and the grooves may have a structure in which two or more holes are perforated in parallel to the side surface of the battery cell.

The curable material added to the side portion of the battery cell using such a battery cell manufacturing apparatus may be an ultraviolet (UV) curable material that is cured by crosslinking during ultraviolet (UV) irradiation

As the ultraviolet curable material, for example, unsaturated polyester-based materials, polyacrylate-based materials such as polyester acrylate, epoxy acrylate, and urethane acrylate can be used, but not limited thereto.

In addition, the ultraviolet ray-curable material may be a material having a hydrophilic functional group. In this case, it is preferable that the ultraviolet ray-curable material collects moisture introduced into the battery, thereby increasing the sealability of the battery case, have.

The curable material may be added to the end portion of the side sealing portion in a high viscosity state, and such an ultraviolet curable material may be added in the form of an oligomer having a predetermined viscosity or a low molecular weight polymer.

Specifically, the UV curable material may be added in a state of viscosity of 18,000 mPa · s to 35,000 mPa · s, preferably in a range of 24,000 mPa · s to 29,000 mPa · s.

That is, since the ultraviolet ray-curable material of the present invention is injected into the corresponding region in the form of an oligomer having a viscosity within the above range or a polymer having a small molecular weight, the coating is easy and there is no flow even after application, Can be obtained.

In some cases, the ultraviolet curable material may be added to the site in the state of being injected with the thickener added as a monomer.

Specifically, examples of the thickening agent that can increase the viscosity of the ultraviolet ray-curable material include carboxymethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol, polyvinyl acetate Polyvinylacrylate), and the viscosity can be improved by adding such a thickener to an ultraviolet curable material.

The present invention also provides a method of manufacturing a battery cell using the above-described battery cell manufacturing apparatus, comprising the steps of: (a) providing a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode A process of attaching the electrode assembly to the battery compartment of the battery case and forming sealing parts on the outer circumferential surface of the battery compartment by thermal fusion;

(b) upwardly bending the first side sealing portion and the second side sealing portion, which are respectively adjacent to the sealing portions where the electrode terminals are located, facing the side surface of the battery case of the battery case, among the sealing portions;

(c) attaching the battery cell manufactured in the step (b) to the battery cell manufacturing apparatus, and arranging the first and second jigs on both sides of the battery cell such that the width of the battery cell is minimized A step of pressing both side surfaces of the battery cell with a spacing distance;

(d) fixing the first jig and the second jig in position on the base plate using a fixing member, respectively;

(e) adding UV curable material to the first side sealing portion and the second side sealing portion through an injector; And

(f) irradiating ultraviolet light to the portion of the battery cell to which the curable material is added to cure the battery cell;

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Therefore, in the method of manufacturing a battery cell according to the present invention, the first jig and the second jig are pressed and fixed to both sides of the battery cell at a distance at which the width of the battery cell is minimized, , The influence of the tolerance of the width size of the battery cell is minimized, so that the curing material can be precisely applied to the side sealing portion of the battery cell, thereby saving manpower and time required for the process, .

The method of setting the distance between the first jig and the second jig is characterized in that after the battery cell having the sealing portion formed on the outer peripheral portion thereof is attached to the manufacturing apparatus, the battery cell is not damaged by the first jig and the second jig By pressing the both side surfaces of the battery cell to the maximum extent and measuring the distance between the two side sealing parts of the battery cell in the pressed state.

Meanwhile, the battery cell manufactured by the apparatus and the method for manufacturing a battery according to the present invention includes a lithium ion secondary battery in which a lithium-containing electrolyte is impregnated in an electrode assembly, a lithium ion secondary battery in which a lithium-containing electrolyte is impregnated with an electrode assembly in the form of a gel, So-called lithium ion polymer batteries, and the like.

Generally, a lithium secondary battery is composed of a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte containing a lithium salt.

The positive electrode is prepared, for example, by coating a mixture of a positive electrode active material, a conductive material and a binder on a positive electrode current collector, and then drying the mixture. Optionally, a filler may be further added to the mixture.

The cathode active material may be a layered compound such as lithium cobalt oxide (LiCoO ₂ ), lithium nickel oxide (LiNiO ₂ ), or a compound substituted with one or more transition metals; Lithium manganese oxides such as Li _{1 + x} Mn _{2 -x} O ₄ (where x is 0 to 0.33), LiMnO ₃ , LiMn ₂ O ₃ , LiMnO ₂ and the like; Lithium copper oxide (Li ₂ CuO ₂ ); Vanadium oxides such as LiV ₃ O ₈ , LiFe ₃ O ₄ , V ₂ O ₅ and Cu ₂ V ₂ O ₇ ; A Ni-site type lithium nickel oxide expressed by the formula LiNi _1-x M _x O ₂ (where M = Co, Mn, Al, Cu, Fe, Mg, B or Ga and x = 0.01 to 0.3); Formula _{LiMn 2-x M x O 2} ( where, M = Co, Ni, Fe , Cr, and Zn, or Ta, x = 0.01 ~ 0.1 Im) or Li ₂ Mn ₃ MO ₈ (where, M = Fe, Co, Ni, Cu, or Zn); LiMn ₂ O _{4 in} which a part of Li in the formula is substituted with an alkaline earth metal ion; Disulfide compounds; Fe ₂ (MoO ₄ ) ₃ , and the like. However, the present invention is not limited to these.

The conductive material is usually added in an amount of 1 to 30% by weight based on the total weight of the mixture including the cathode active material. Such a conductive material is not particularly limited as long as it has electrical conductivity without causing chemical changes 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, and summer black; Conductive fibers such as carbon fiber and metal fiber; Metal powders such as carbon fluoride, aluminum, and nickel powder; Conductive whiskey such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives and the like can be used.

The binder is a component which assists in bonding of the active material and the conductive material and bonding to the current collector, and is usually added in an amount of 1 to 30% by weight based on the total weight of the mixture containing the cathode active material. Examples of such binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene , Polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber, fluorine rubber, various copolymers and the like.

The filler is optionally used as a component for suppressing the expansion of the anode, and is not particularly limited as long as it is a fibrous material without causing a chemical change in the battery. Examples of the filler include olefin polymers such as polyethylene and polypropylene; Fibrous materials such as glass fibers and carbon fibers are used.

The negative electrode is manufactured by applying and drying a negative electrode active material on a negative electrode collector, and if necessary, the above-described components may be selectively included.

Examples of the negative electrode active material include carbon such as non-graphitized carbon and graphite carbon; _{Li x Fe 2 O 3 (0≤x≤1} ), Li x WO 2 (0≤x≤1), Sn x Me 1-x Me 'y O z (Me: Mn, Fe, Pb, Ge; Me' : Metal complex oxides such as Al, B, P, Si, Group 1, Group 2, Group 3 elements of the periodic table, Halogen, 0 < x < Lithium metal; Lithium alloy; Silicon-based alloys; Tin alloy; _{SnO, SnO 2, PbO, PbO} 2, Pb 2 O 3, Pb 3 O 4, Sb 2 O 3, Sb 2 O 4, Sb 2 O 5, GeO, GeO 2, Bi 2 O 3, Bi 2 O 4, and Bi ₂ O ₅ ; Conductive polymers such as polyacetylene; Li-Co-Ni-based materials and the like can be used.

The separation membrane is interposed between the anode and the cathode, and an insulating thin film having high ion permeability and mechanical strength is used. The pore diameter of the separator is generally 0.01 to 10 mu m and the thickness is generally 5 to 300 mu m. Such separation membranes include, for example, olefinic polymers such as polypropylene, which are chemically resistant and hydrophobic; A sheet or nonwoven fabric made of glass fiber, polyethylene or the like is used. When a solid electrolyte such as a polymer is used as an electrolyte, the solid electrolyte may also serve as a separation membrane.

The nonaqueous electrolyte solution containing a lithium salt is composed of a polar organic electrolyte and a lithium salt. As the electrolytic solution, a non-aqueous liquid electrolytic solution, an organic solid electrolyte, an inorganic solid electrolyte and the like are used.

Examples of the nonaqueous liquid electrolytic solution include N-methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, gamma -Butyrolactone, 1,2-dimethoxyethane, tetrahydroxyfuran, 2-methyltetrahydrofuran, dimethylsulfoxide, 1,3-dioxolane, formamide, dimethylformamide, dioxolane , Acetonitrile, nitromethane, methyl formate, methyl acetate, triester phosphate, trimethoxymethane, dioxolane derivatives, sulfolane, methylsulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbonate Nonionic organic solvents such as tetrahydrofuran derivatives, ethers, methyl pyrophosphate, ethyl propionate and the like can be used.

Examples of the organic solid electrolyte include a polymer electrolyte such as a polyethylene derivative, a polyethylene oxide derivative, a polypropylene oxide derivative, a phosphate ester polymer, an agitation lysine, a polyester sulfide, a polyvinyl alcohol, a polyvinylidene fluoride, Polymers containing ionic dissociation groups, and the like can be used.

Examples of the inorganic solid electrolyte include Li ₃ N, LiI, Li ₅ NI ₂ , Li ₃ N-LiI-LiOH, LiSiO ₄ , LiSiO ₄ -LiI-LiOH, Li ₂ SiS ₃ , Li ₄ SiO ₄ , Nitrides, halides and sulfates of Li such as Li ₄ SiO ₄ -LiI-LiOH and Li ₃ PO ₄ -Li ₂ S-SiS ₂ can be used.

The lithium salt is a material that is readily soluble in the non-aqueous electrolyte, for example, LiCl, LiBr, LiI, LiClO 4, LiBF 4, LiB 10 Cl 10, LiPF 6, LiCF 3 SO 3, LiCF 3 CO 2, LiAsF _{6, LiSbF 6, LiAlCl 4,} CH 3 SO 3 Li, CF 3 SO 3 Li, (CF 3 SO 2) 2 NLi, chloroborane lithium, lower aliphatic carboxylic acid lithium, lithium tetraphenyl borate and imide have.

For the purpose of improving the charge-discharge characteristics and the flame retardancy, the non-aqueous liquid electrolyte may contain, for example, pyridine, triethylphosphite, triethanolamine, cyclic ether, ethylenediamine, glyme, N-substituted imidazolidine, ethylene glycol dialkyl ether, ammonium salt, pyrrole, 2-methoxyethanol, aluminum trichloride and the like are added It is possible. In some cases, a halogen-containing solvent such as carbon tetrachloride or ethylene trifluoride may be further added to impart nonflammability, or a carbon dioxide gas may be further added to improve high-temperature storage characteristics.

The present invention also provides a device including at least one battery cell manufactured by the battery cell manufacturing apparatus.

Specific examples of the device include, but are not limited to, a mobile phone, a tablet computer, a notebook computer, a power tool, an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.

Such devices or devices are well known in the art, so a detailed description thereof will be omitted herein.

As described above, the apparatus for manufacturing a battery cell according to the present invention includes a first jig for pressing one side of a battery cell based on a direction in which electrode terminals are formed, and a second jig for pressing the other side, The position of the sealing portion on both sides of the battery cell requiring the addition of the curable material is fixed and the position of the sealing portion of the battery cell which requires addition of the curable material becomes constant and precise by fixing the first jig and the second jig with the at least one fixing member in a fixed position relative to the base plate As the additional work becomes possible, the sealing ability of the battery is improved and the short-circuit phenomenon caused by the exposure of the metal layer of the battery case is prevented.

1 is an exploded perspective view of a general structure of a conventional pouch-shaped battery;
2 is a plan view of a battery cell according to one embodiment of the present invention;
3 is a perspective view of a battery cell manufacturing apparatus for applying a curable material according to one embodiment of the present invention;
4 is a plan view of a battery cell manufacturing apparatus prior to pressing both side sealing portions of a battery cell according to an embodiment of the present invention;
5 is a sectional view of the battery cell manufacturing apparatus in which the first side sealing portion and the second side sealing portion of the battery case are pressed by the first jig and the second jig in an upwardly bent state.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

2 is a schematic plan view showing a battery cell 100 according to an embodiment of the present invention.

2, a battery cell 100 according to the present invention includes an electrode assembly (not shown) having a positive electrode / separator / negative electrode structure laminated on a storage portion 112 of a battery case 120 of a laminate sheet including a resin layer and a metal layer And the outer circumferential surface 160 of the battery case 120 is thermally fused to the outer surface 160 of the battery case 120. In the heat fusion process, The first side sealing portion 130 and the second side sealing portion 140 are formed.

The side sealing portions 130 and 140 are coated with a curable material to improve the sealing ability of the battery and to prevent the insulation breakdown caused by exposing the metal layer of the battery case 120. [

3 is a perspective view of a battery cell manufacturing apparatus 200 for applying a curable material according to an embodiment of the present invention.

3, the battery cell manufacturing apparatus 200 of the present invention includes a first jig 210 for pressing one side surface 180 of the battery cell 100 with respect to a direction in which the electrode terminal 170 is formed, A second jig 220 for pressing the other side surface 190 of the cell 100 is formed. The first jig 210 and the second jig 220 are mounted on the upper surface of the base plate 240 and the battery cell 100 is attached to one end 241 and the opposite end 242 of the base plate 240 Guide portions 301 and 302 for guiding movement of the first jig 210 and the second jig 220 are formed in the direction in which the first jig 210 and the second jig 220 are positioned.

The first jig 210 and the second jig 220 are provided with fixing members 401 and 402 for fixing the first jig 210 and the second jig 220 to specific positions on the base plate 240, 402, 403, 404, 405, 406 are penetrated.

4 is a plan view schematically showing a battery cell manufacturing apparatus 200 prior to pressing both side sealing portions of the battery cell 100 according to an embodiment of the present invention. Sectional view of the battery cell manufacturing apparatus 200 in a state in which the first side sealing portion 131 and the second side sealing portion 141 are pressed by the first jig 210 and the second jig 220 in a state Respectively.

Referring to FIG. 4, the first and second jigs 210 and 220 are provided with through-holes 211 through which the fixing members 401, 402, 403, 404, 405, and 406 can be inserted, 212, 213, 224, 225, and 226 are formed in the base plate 240 in parallel to the side surface of the battery cell 100. The through holes 211, 212, 213, Grooves 241, 242, 243, 244, 245, and 246 corresponding to the grooves 241, 242, 244, 245, and 246 are formed.

Each of the through holes (211, 212, 213, 224, 225, 226) and the grooves (241, 242, 243, 244, 245, 246) The first jig 210 and the second jig 220 may be spaced apart from each other by a predetermined distance and fixed in position with respect to the base plate 240 by inserting the first jig 210, the second jig 220,

5, the first side sealing portion 131 and the second side sealing portion 141 of the battery cell 100 are bent upward while the first jig 210 is bent before the curable material is applied, And the second jig 220, respectively.

A stopper 215 having a structure in which the jig body is bent downward is formed on the first jig 210 and the second jig 220 so as to be caught by the end of the base plate 240 in the process of moving in the direction of the battery cell 100 And covers the upper surface and a part of the side surface of the base plate 240, and has a "A" shape in cross section.

The first jig 210 and the second jig 220 in which the stopper 215 is formed press the battery cell 100 excessively beyond the distance D at which the width of the battery cell is minimized, Can be prevented from being damaged.

The apparatus 200 for manufacturing a battery cell of the present invention includes an injector 270 for adding a curable material to a side surface portion of the battery cell 100 in a state of being pressed by the first jig 210 and the second jig 220, The injector 270 may be disposed at a predetermined position in a direction perpendicular to the plane of the battery cell 100 when the injector 275 is positioned in a direction perpendicular to the plane of the battery cell 100 when the curing material is added to the side surface of the battery cell 100. [ It is more preferable to be positioned in a tilted state.

As described above, the battery cell manufacturing apparatus 200 according to the present invention is configured to press both side surfaces of the battery cell 100 with the first jig 210 and the second jig 220, The first jig 220 and the second jig 220 are spaced apart from each other by a distance D at which the width of the battery cell 100 is minimized within a range in which the battery cell 100 is not damaged, Since the curing material is added in a state where the width of the battery cell 100 is minimized, the influence of the tolerance of the width size of the battery cell 100 is minimized, and the battery cell 100 requiring the addition of the curing material (not shown) As the positions of the sealing portions 130 and 140 on both sides of the sealing portion 130 and the sealing portion 130 become constant, it is possible to perform a precise addition operation.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (23)

A first jig for pressing one side of the battery cell based on a direction in which the electrode terminal is formed and a second jig for pressing the other side of the battery cell;
A base plate on which the first jig and the second jig are mounted on an upper surface and in which a guide for guiding movement of the first jig and the second jig toward the battery cell is formed on at least one of the one end and the opposite end;
An injector for adding a curable material to a side surface portion of the battery cell pressed by the first jig and the second jig; And
At least one fixing member for fixing the first and second jigs to the base plate in a fixed position;
Wherein the battery cell manufacturing apparatus comprises: The battery cell manufacturing apparatus according to claim 1, wherein the battery cell is a plate-shaped battery cell in which an electrode assembly is embedded in a battery case of a laminate sheet including a resin layer and a metal layer. The battery cell manufacturing apparatus according to claim 1, wherein the outer circumferential surface of the battery cell comprises a sealed portion that is thermally fused. 4. The battery pack according to claim 3, wherein the first side sealing portion and the second side sealing portion, which are respectively adjacent to the sealing portions where the electrode terminals of the battery cells are located, are pressed by the first jig and the second jig in an upward- The battery cell manufacturing apparatus comprising: The apparatus of claim 1, wherein the first jig and the second jig pressurize the battery cell at a distance that minimizes the width of the battery cell, so that the battery cell is not damaged. The battery cell manufacturing apparatus according to claim 5, wherein the battery cells pressed by the first jig and the second jig have no tolerance in the width direction. The battery cell manufacturing apparatus according to claim 1, wherein a stopper for limiting movement of the jig in the direction of the battery cell is formed at an end of the first and second jigs. [8] The apparatus of claim 7, wherein the stopper has a structure in which the jig body is bent downward so as to be caught by an end of the base plate in a process of moving the jig in the direction of the battery cell. [2] The apparatus of claim 1, wherein at least one through hole is drilled in each of the first and second jigs, and a groove corresponding to the through hole is formed in the base plate, Wherein the fixing member is inserted to fix the first jig and the second jig to the base plate in the correct position. The battery cell manufacturing apparatus according to claim 9, wherein the through-holes and the grooves are perforated more than once in a direction parallel to a side surface of the battery cell. The apparatus of claim 1, wherein the curable material is an ultraviolet (UV) curable material. The apparatus of claim 11, wherein the ultraviolet curable material is selected from the group consisting of an unsaturated polyester-based material and a polyacrylate-based material. 12. The apparatus of claim 11, wherein the ultraviolet curable material is a material having a hydrophilic functional group. 12. The apparatus for manufacturing a battery cell according to claim 11, wherein the ultraviolet curable material is added to an end portion of the side sealing portion in a high viscosity state. 12. The apparatus for manufacturing a battery cell according to claim 11, wherein the UV curable material is added in the form of an oligomer having a predetermined viscosity or a polymer having a low molecular weight. 12. The apparatus of claim 11, wherein the ultraviolet curable material is added in a viscosity of from 18,000 mPa · s to 35,000 mPa · s. 12. The apparatus of claim 11, wherein the ultraviolet curable material is added in a viscosity of from 24,000 mPa · s to 29,000 mPa · s. The apparatus of claim 11, wherein the ultraviolet curable material is injected with a thickener added as a monomer. 5. The apparatus for manufacturing a battery cell of claim 4, wherein the curable material is applied in such a manner as to apply the ends of the first side sealing portion and the second side sealing portion. A method for manufacturing a battery cell using the apparatus for manufacturing a battery according to claim 1,
(a) attaching an electrode assembly including a positive electrode, a negative electrode, and a separator interposed between an anode and a cathode to a storage portion of a battery case, and forming sealing portions on the outer circumferential surface of the storage portion by thermal fusion;
(b) upwardly bending the first side sealing portion and the second side sealing portion, which are respectively adjacent to the sealing portions where the electrode terminals are located, facing the side surface of the battery case of the battery case, among the sealing portions;
(c) attaching the battery cell manufactured in the step (b) to the battery cell manufacturing apparatus, and arranging the first and second jigs on both sides of the battery cell such that the width of the battery cell is minimized A step of pressing both side surfaces of the battery cell with a spacing distance;
(d) fixing the first jig and the second jig in position on the base plate using a fixing member, respectively;
(e) adding UV curable material to the first side sealing portion and the second side sealing portion through an injector; And
(f) irradiating ultraviolet light to the portion of the battery cell to which the curable material is added to cure the battery cell;
And forming a battery cell. The battery cell manufacturing method according to claim 20, wherein the battery cell is a lithium secondary battery. A device comprising at least one battery cell manufactured by the battery cell manufacturing apparatus according to claim 1. 23. The device of claim 22, wherein the device is any one selected from a cell phone, a tablet computer, a notebook computer, a power tool, an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.

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