KR20170089276A - Device for Manufacturing Battery Cell Having One-Stop Folding Member - Google Patents

Abstract

The present invention relates to a device for folding a sealing excess unit in a direction of an electrode assembly receiving unit in a battery cell in which the sealing excess unit is formed on the outside of the electrode assembly receiving unit. The present invention relates to a battery cell manufacturing device comprising: a cell fixing jig; a guide member; and a folding member. The cell fixing jig mounts the battery cell in a state of projecting a part of an outer end unit of the sealing excess unit to the outside of the jig. The guide member forms a folding point by downwardly pressurizing a part of an inner end unit, which adheres to the electrode assembly receiving unit of the sealing excess unit, in a first direction which is vertical to the ground. The folding member folds the part of the outer end unit of the sealing excess unit in a second direction which is faced to the first direction based on the folding point; and upwardly pressurizes the part of the outer end unit of the sealing excess unit while moving to the second direction. Provided is the battery cell manufacturing device capable of returning guide member to a pre-pressurization positon in a state of enabling the part of the outer end unit of the sealing excess unit to be folded in the second direction; and additionally folding the part of the outer end unit of the sealing excess unit in a third direction by rotating the folding member in the third direction which is orthogonal to the first direction and the second direction.

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 one-stop folding member,

The present invention relates to a battery cell manufacturing apparatus including a one-stop bending member.

As information technology (IT) technology has developed remarkably, various portable information and communication devices have been spreading, so that the 21st century is being developed into a "ubiquitous society" capable of providing high quality information services regardless of time and place.

As a development base for such a ubiquitous society, a lithium secondary battery occupies an important position. Specifically, the rechargeable lithium secondary battery is widely used as an energy source for wireless mobile devices, and is proposed as a solution for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels And also as an energy source for electric vehicles, hybrid electric vehicles, and the like.

As described above, as the devices to which the lithium secondary battery is applied are diversified, the lithium secondary battery has been diversified to provide an appropriate output and capacity for the applied device. In addition, miniaturization is strongly demanded.

The lithium secondary battery may be classified into a cylindrical battery cell, a prismatic battery cell, and a pouch-shaped battery cell depending on its shape. Among them, a pouch-type battery cell which can be stacked with a high degree of integration, has a high energy density per unit weight, and is inexpensive and easy to deform is attracting much attention.

FIG. 1 schematically shows a general structure of a representative secondary battery including a stacked electrode assembly.

1, the secondary battery 10 includes an electrode assembly 30 including a positive electrode, a negative electrode, and a separator disposed therebetween in a pouch-shaped battery case 20, The tabs 31 and 32 are welded to the two electrode leads 40 and 41 and sealed (sealed) so as to be exposed to the outside of the battery case 20.

The battery case 20 is made of a soft packaging material such as an aluminum laminate sheet and includes a case body 21 including a concave shaped storage portion 23 on which the electrode assembly 30 can be seated, And a lid 22 to which one side is connected.

The electrode assembly 30 used in the secondary battery 10 may have a jelly-roll structure or a stack / folding structure other than the stacked structure as shown in FIG. In the stacked electrode assembly 30, a plurality of positive electrode tabs 31 and a plurality of negative electrode tabs 32 are welded to the electrode leads 40 and 41, respectively.

The pouch-shaped secondary battery having the above-described structure seals the outer periphery of the battery case so as not to leak the electrolyte inside the battery case, and improves the sealing property by bending the sealing part formed at both sides of the battery case twice.

Conventionally, two bending members have been used to bend the sealing portion of the battery case twice. First, the sealing portion of the battery case was first bent by a single bending member, and then the sealing portion of the battery case was bent by the remaining one bending member.

However, such a bending device requires two bending processes in order to seal the sealing portion of the battery case, and thus has a problem of increasing the process time.

Therefore, there is a high need for a technique capable of fundamentally solving such problems.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and the technical problems required from the past.

Specifically, an object of the present invention is to provide a battery cell manufacturing apparatus capable of shortening a process time by bending a sealing surplus portion twice in one step by a single bending member in a process of bending a sealing surplus portion of the battery cell will be.

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

An apparatus for bending a sealing surplus portion in a direction of an electrode assembly receiving portion in a battery cell having a sealing surplus portion formed on an outer periphery of an electrode assembly receiving portion,

A cell fixing jig in which an outer end portion of the sealing surplus portion is protruded beyond an outer side of the jig to which the battery cell is mounted;

A guide member that presses the inner end portion in contact with the electrode assembly receiving portion of the sealing surplus portion downward in a first direction perpendicular to the paper surface to form a bending point; And

A bending member for upwardly pressing the outer end portion of the sealing surplus portion while moving in the second direction so that the outer end portion of the sealing surplus portion is bent in the second direction opposite to the first direction on the basis of the bending point;

, ≪ / RTI >

The guide member returns to the pre-pressing position in a state where the outer end portion of the sealing surplus portion is bent in the second direction, and the bending member rotates in the third direction orthogonal to the first direction and the second direction, And to further bend the outer lateral end portion in the third direction.

Therefore, the battery cell manufacturing apparatus according to the present invention includes a folding member which first pressurizes the sealing surplus portion of the battery cell first and then bends and further rotates to thereby bend the secondary sealing member, whereby in the step of bending the sealing surplus portion of the battery cell, It is possible to shorten the processing time by folding the sealing surplus portion twice with one bending member by one bending member.

The first direction may be a direction perpendicular to the paper surface and a direction toward the paper surface, the second direction may be a direction opposite to the first direction and a direction away from the paper surface, and the third direction may be a direction And a direction orthogonal to the second direction and parallel to the ground.

In one embodiment of the present invention, the guide member may be a structure for pressing downward the inner end portion of the sealing surplus portion in tight contact with the outer surface of the electrode assembly receiving portion. Therefore, the width of the guide member in the vertical section may be of a size corresponding to the width of the double folded sealing surplus portion.

As a specific example of the guide member, a depressed portion having a shape corresponding to an upper surface and an outer surface of the electrode assembly receiving portion may be formed on one surface of the guide member. Therefore, the guide member can press down the inner end portion of the sealing surplus portion in a state of being in close contact with the upper and outer surfaces of the electrode assembly receiving portion. Specifically, the depressed portion may be formed in a '?' Shape on a vertical cross section.

As a specific example of the bending member, the bending member may have a bar shape.

More specifically, the bending member may include:

A contact portion having a shape in which one side of the bar is recessed so as to abut the outer end portion of the sealing surplus portion; And

A shaft portion formed at both side ends in the longitudinal direction of the bar and connected to the power unit to induce vertical movement of the bending member in the second direction and rotational movement in the third direction;

As shown in FIG.

In one embodiment, in a state where the outer end portion of the sealing surplus portion is bent in the second direction, the bending member is rotated 90 degrees in the first direction and the third direction orthogonal to the second direction, To further flex the region in the third direction.

In another embodiment, in a state where the outer end portion of the sealing surplus portion is bent in the second direction, the bending member is rotated 180 degrees in the first direction and the third direction orthogonal to the second direction, And to further bend the end portion in the third direction.

In one embodiment of the present invention, the fixing jig may be formed to extend to a position where the guide member presses the inner end portion of the sealing surplus portion.

The inner end portion may be a portion corresponding to a length of 30% to 50% from the inner end based on the entire width of the sealing surplus portion. If the inner end portion is less than 30% from the inner end with respect to the entire width of the sealing surplus portion, a sufficient space for bending the sealing surplus portion can not be secured. On the other hand, if the inside end portion exceeds 50% from the inside end portion with respect to the entire width of the sealing surplus portion, the sealing surplus portion may protrude outwardly of the battery cell even after being folded to form a battery cell having a compact structure none.

The outer end portion may be a portion corresponding to a length of 20% to 50% from the outer end based on the entire width of the sealing surplus portion. When the outer end portion is less than 20% from the outer end with respect to the entire width of the sealing surplus portion, the sealing surplus portion protrudes outwardly of the battery cell even after bending, so that the battery cell having a compact structure can not be formed. On the other hand, when the outer end portion exceeds 50% from the outer end with respect to the entire width of the sealing surplus portion, the space for bending the sealing surplus portion may not be sufficient.

The present invention also provides a battery cell having a structure in which a sealing surplus portion is bent by the battery cell manufacturing apparatus.

The battery cell may be a pouch-type battery.

Specifically, the battery cell includes an electrode assembly having a positive electrode, a separator, and a negative electrode laminated structure, which is embedded in a battery case having an electrode assembly electrode assembly storage portion formed therein together with an electrolyte solution. The outer periphery of the electrode assembly storage portion is heat- A sealing surplus portion may be formed.

The electrode assembly may have a folding structure, a stacking structure, or a stacking / folding structure, or a lamination / stacking structure.

The electrode structures of the folding type, the stacking type, the stacking / folding type, and the lamination / stacking type will be described in detail as follows.

First, a unit cell of a folding structure can be produced by coating a mixture containing an electrode active material on each metal current collector, placing the separator sheet between a cathode and an anode in the form of a sheet dried and pressed, and winding .

The unit cells of the stacked structure are formed by coating each electrode collector with an electrode mixture, drying and pressing the separator, and separating the positive and negative plates with a predetermined size corresponding to the positive and negative plates, And then laminating them.

The unit cell of the stack / folding type structure includes two or more unit cells in which the anode and the cathode face each other and in which two or more electrode plates are stacked, and the unit cells are wound with at least one separating film in a non- Or by bending the separation film to a size of the unit cell and interposing it between the unit cells.

In some cases, the positive electrode and the negative electrode face each other, and one or more single electrode plates may be further included between any unit cells and / or an outer surface of the outermost unicell.

The unit cell may be an S-type unit cell in which the outermost electrode plates on both sides have the same electrode, and a D-type unit cell in which the outermost electrode plates on opposite sides have opposite electrodes.

The S type unit cell may be an SA type unit cell in which the outermost electrode plates on both sides are the anode, and an SA type unit cell in which the outermost electrode plates on both sides are the cathodes.

The unit cells of the lamination / stacked structure are obtained by coating each metal current collector with an electrode mixture, drying, pressing and cutting to a predetermined size, sequentially forming a negative electrode from the bottom, a separator, And a separator is laminated thereon.

As a specific example of the battery case, the battery case is made of a laminate sheet including a resin outer layer of excellent durability, a metal layer of barrier property, and a heat-fusible resin sealant layer, and the resin sealant layers are heat- .

Since the resin outer layer must have excellent resistance from the external environment, it is necessary to have a tensile strength and weather resistance higher than a predetermined level. In this respect, polyethylene terephthalate (PET) and stretched nylon film can be preferably used as the polymer resin of the outer resin layer.

The barrier metal layer may preferably be made of aluminum so as to exhibit a function of improving the strength of the battery case, in addition to a function of preventing foreign matter such as gas or moisture from leaking or leaking.

The resin sealant layer may preferably be a polyolefin resin having low heat absorbability (thermal adhesiveness), low hygroscopicity to suppress penetration of an electrolyte solution, and not being swollen or eroded by an electrolytic solution, Preferably, lead-free polypropylene (CPP) can be used.

In one specific example, the type of the battery cell is not particularly limited, but specific examples thereof include a lithium ion battery having advantages such as a high energy density, a discharge voltage, and an output stability, a lithium secondary battery such as a lithium ion polymer battery, Battery.

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 &lt; 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 and the separation film are 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 130 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.

Further, in one specific example, in order to improve the safety of the battery, the separation membrane and / or the separation film may be an organic / inorganic composite porous SRS (Safety-Reinforcing Separators) separation membrane.

The SRS separator is manufactured by using inorganic particles and a binder polymer on the polyolefin-based separator substrate as an active layer component. In addition to the pore structure contained in the separator substrate itself, the SRS separator is formed by interstitial volume between inorganic particles And has a uniform pore structure.

The use of such an organic / inorganic composite porous separator has the advantage of suppressing an increase in thickness of the cell due to swelling at the time of chemical conversion compared with the case of using a conventional separator, When a gelable polymer is used when liquid electrolyte is impregnated, it can also be used as an electrolyte.

In addition, the organic / inorganic composite porous separator can exhibit excellent adhesion characteristics by controlling the contents of the inorganic particles and the binder polymer in the separator, so that the cell assembly process can be easily performed.

The inorganic particles are not particularly limited as long as they are electrochemically stable. That is, the inorganic particles usable in the present invention are not particularly limited as long as the oxidation and / or reduction reaction does not occur in the operating voltage range of the applied battery (for example, 0 to 5 V based on Li / Li +). Particularly, when inorganic particles having an ion-transporting ability are used, the ion conductivity in the electrochemical device can be increased and the performance can be improved. Therefore, it is preferable that the ionic conductivity is as high as possible. In addition, when the inorganic particles have a high density, it is difficult to disperse the particles at the time of coating, and there is a problem of an increase in weight during the production of the battery. In the case of an inorganic substance having a high dielectric constant, dissociation of an electrolyte salt, for example, a lithium salt, in the liquid electrolyte also contributes to increase ionic conductivity of the electrolyte.

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, N-substituted imidazolidine, ethylene glycol dialkyl ether, ammonium salt, pyrrole, 2-methoxyethanol, aluminum trichloride, etc. 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 battery pack including at least two battery cells.

The present invention also provides a device including the battery pack as a power source.

The device may be selected from a cell phone, a wearable electronic device, a portable computer, a smart pad, a netbook, a LEV (Light Electronic Vehicle), an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.

The structure of these devices and their fabrication methods are well known in the art, and a detailed description thereof will be omitted herein.

As described above, the battery cell manufacturing apparatus according to the present invention includes the folding member that first pressurizes the sealing surplus portion of the battery cell first and then further bends and rotates to thereby fold the battery cell, It is possible to shorten the processing time by bending the sealing surplus portion twice with one stop by the single bending member in the process.

1 is an exploded view of a conventional pouch type secondary battery;
2 is a perspective view of a battery cell manufacturing apparatus according to one embodiment of the present invention;
3 is a vertical sectional view of the battery cell manufacturing apparatus according to the bending process steps of the sealing surplus portion of the battery cell of FIG.

Hereinafter, the present invention will be described in detail with reference to the drawings according to the embodiments of the present invention, but the scope of the present invention is not limited thereto.

FIG. 2 is a perspective view of a battery cell manufacturing apparatus according to an embodiment of the present invention, and FIG. 3 is a vertical sectional view of a battery cell manufacturing apparatus according to a bending process step of a sealing remainder of the battery cell of FIG. Respectively.

Referring to FIGS. 2 and 3, the battery cell manufacturing apparatus 100 includes a cell fixing jig 200, a guide member 300, and a bending member 400.

The cell fixing jig 200 is formed to extend to a position where the guide member 300 presses the inner end portion of the sealing pad 11.

A depression 310 having a shape corresponding to an upper surface and an outer surface of the electrode assembly accommodating portion 12 is formed on one surface of the guide member 300. The indent 310 is in the shape of a letter "A" on the vertical cross section.

The bending member 400 has a bar shape. Specifically, the bending member 400 includes a contact portion 410 and a shaft portion 420. The contact portion 410 has a shape in which one side of the bar is recessed so that the outer end portion of the sealing pad 11 is in contact with the shaft portion 420. The shaft portion 420 is formed at both side ends in the longitudinal direction of the bar, (Not shown) so as to induce vertical movement of the bending member in the vertical direction and rotational movement in the horizontal direction.

In the bending process step (a), the battery cell 10 is mounted such that the outer end portion of the sealing pad 11 protrudes beyond the outer side of the jig 200, and the guide member 300 is sealed 11 are pressed downward to form the bending point 13.

In the bending process step (b), the bending member 400 is moved upwards so that the outer end portion of the sealing ring 11 is upwardly bent with respect to the bending point 13, .

In the bending process step (c), the guide member 300 is returned to the pre-pressing position, and the bending member 400 is rotated 90 degrees in the horizontal direction so that the outer end portion of the sealing member 11 is further bent in the horizontal direction It works.

As described above, the battery cell manufacturing apparatus 100 includes the bending member 400 that first presses the sealing member 11 of the battery cell 10 upward, first bends, and further rotates to bend, It is possible to shorten the processing time by bending the sealing pad 11 twice with one-stop.

Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (17)

An apparatus for bending a sealing surplus portion in a direction of an electrode assembly receiving portion in a battery cell having a sealing surplus portion formed on an outer periphery of an electrode assembly receiving portion,
A cell fixing jig in which an outer end portion of the sealing surplus portion is protruded beyond an outer side of the jig to which the battery cell is mounted;
A guide member that presses the inner end portion in contact with the electrode assembly receiving portion of the sealing surplus portion downward in a first direction perpendicular to the paper surface to form a bending point; And
A bending member for upwardly pressing the outer end portion of the sealing surplus portion while moving in the second direction so that an outer end portion of the sealing surplus portion is bent in a second direction opposite to the first direction on the basis of the bending point;
And,
The guide member returns to the pre-pressing position in a state where the outer end portion of the sealing surplus portion is bent in the second direction, and the bending member rotates in the third direction orthogonal to the first direction and the second direction, And to further bend the outer end portion of the portion in the third direction. The apparatus for manufacturing a battery cell according to claim 1, wherein the guide member presses the inner end portion of the sealing surplus portion downward while closely contacting the outer surface of the electrode assembly receiving portion. The apparatus for manufacturing a battery cell according to claim 2, wherein a depressed portion having a shape corresponding to an upper surface and an outer surface of the electrode assembly receiving portion is formed on one surface of the guide member. The apparatus for manufacturing a battery cell according to claim 1, wherein the bending member is formed in a bar shape. 5. The bending device according to claim 4,
A contact portion having a shape in which one side of the bar is recessed so as to abut the outer end portion of the sealing surplus portion; And
A shaft portion formed at both side ends in the longitudinal direction of the bar and connected to the power unit to induce vertical movement of the bending member in the second direction and rotational movement in the third direction;
The battery cell manufacturing apparatus comprising: The apparatus of claim 1, wherein the bending member is rotated by 90 degrees. The apparatus of claim 1, wherein the bending member rotates 180 degrees. The battery cell manufacturing apparatus according to claim 1, wherein the fixing jig is formed so that the guide member extends to a position where the guide member presses the inner end portion of the sealing surplus portion. The battery cell manufacturing apparatus according to claim 1, wherein the inner end portion is a portion corresponding to a length of 30% to 50% from the inner end portion based on the entire width of the sealing surplus portion. The battery cell manufacturing apparatus according to claim 1, wherein the outer end portion is a portion corresponding to a length of 20% to 50% from the outer end portion based on the entire width of the sealing surplus portion. A battery cell having a structure in which a sealing surplus portion is bent by an apparatus according to claim 1. The battery cell according to claim 11, wherein the battery cell is a pouch type battery. [12] The battery cell of claim 12, wherein the battery cell has a positive electrode, a separator, and a negative electrode laminated electrode assembly embedded in a battery case having an electrode assembly electrode assembly storing part together with an electrolyte solution, And a sealing surplus portion is formed by fusion bonding. 14. The battery cell of claim 13, wherein the electrode assembly is a folding structure, a stacking structure, a stacking / folding structure, or a lamination / stacking structure. 14. The battery cell according to claim 13, wherein the battery case is made of a laminate sheet including a resin outer layer, a barrier metal layer, and a heat-meltable resin sealant layer. A battery pack comprising at least two battery cells according to claim 11. A device as claimed in claim 16 comprising a battery pack as a power source.

Images