KR20170103332A - Device for Transferring Battery Cell Having Sensor for Sensing Electrode Lead - Google Patents

Abstract

The present invention relates to a device for transferring a battery cell to a degas device for a degas process for removing gas inside the battery cell during processes for manufacturing a battery cell, and provides a device for transferring a battery cell, which comprises: a tray in which a plurality of battery cells are vertically arranged and mounted with side surfaces facing each other; and a gripper in which a part of electrode lead of the battery cells mounted on the tray and a part of one side of a battery case having an electrode lead formed therein are pressed and fixed, and which is vertically lifted the battery cell from the ground and taken out from the tray to be transferred to the degas device, wherein a sensor is mounted to detect whether the electrode lead is bent or warped at a portion in which the electrode lead comes in contact at the gripper.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a device for transferring battery cells,

The present invention relates to a battery cell transfer device including a sensor for detecting an electrode lead.

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.

The pouch-shaped battery cell has a structure in which an electrode assembly composed of an anode, a cathode, and a separator disposed therebetween is embedded in a battery case made of a laminate sheet together with an electrolytic solution, and the outer periphery of the battery case is sealed by sealing.

In such a pouch-shaped battery cell, a gripper is mainly used as a transferring means in the process of transferring the battery cell by the process steps in the battery cell manufacturing process. The gripper presses a part of the electrode lead protruding from the battery case of the battery cell and a part of the battery case to fix the battery cell.

However, the pouch-shaped battery cell is composed of a battery case of a material having a relatively low rigidity of the laminate sheet, and the electrode lead is formed by protruding from one side of the battery case. As a result, the electrode lead or the outer periphery of the battery case may bend or bend due to a gripper or an external impact as the battery cell passes through the manufacturing process step. This is because when the gripper transports the battery cell, The battery cell is detached from the gripper and the battery cell is damaged due to the drop impact. This damaged battery cell is discarded and the loss rate is increased.

Particularly, in a process of transferring a battery cell using a gripper, in a process of transferring a battery cell by a gas process to finish the charging and discharging process of the battery cell and to remove gas generated inside the battery cell, And the like.

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.

More specifically, it is an object of the present invention to provide a battery pack having a structure in which a fixing force between a battery cell and a gripper is enhanced in a process of transferring a battery cell to a degassing device, and bending or bending occurs in an electrode lead of the battery cell, The present invention provides a battery cell feeding device capable of detecting whether the electrode lead is bent or bent and determining whether the battery cell is fed or not when the contact area is not sufficiently secured.

According to an aspect of the present invention,

A battery cell transfer device for transferring a battery cell to a degassing device for a degas process for removing gas inside the battery cell during a battery production process,

A tray in which a plurality of battery cells are vertically arranged and mounted with their side surfaces facing each other; And

A part of the electrode lead of the battery cell mounted on the tray and a part of one side of the battery case in which the electrode lead is formed are pressed and fixed so that the battery cell is vertically lifted from the paper surface and taken out from the tray, A gripper for feeding the gripper to the gripper;

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A sensor may be mounted on a portion of the gripper in contact with the electrode lead so as to detect whether the electrode lead is bent or bent.

Therefore, the battery cell transferring apparatus according to the present invention includes a gripper having a sensor mounted thereon for detecting bending or bending of the electrode lead at a portion in contact with the electrode lead, When the fixing force between the battery cell and the gripper is increased and the electrode lead of the battery cell is bent or bent and the contact area of the gripper with respect to the electrode lead is not sufficiently secured in the process of transferring, It is possible to detect whether or not the battery cell is transported.

In one embodiment of the present invention, the battery cell may be a pouch-shaped battery having a plate-like structure.

Specifically, the battery cell includes an electrode assembly having a positive electrode, a separator, and a negative electrode laminated structure embedded in a battery case having an electrode assembly housing portion formed therein together with an electrolyte, and a sealing surplus Or the like.

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.

As described above, the pouch-shaped battery cell is composed of a battery case of a material having a relatively low rigidity of the laminate sheet, and the electrode lead is protruded from one side of the battery case. Therefore, There is a high possibility that bending or bending of the electrode lead occurs. Accordingly, the battery cell transfer device according to the present invention can be applied mainly to transfer the pouch-shaped battery cell. However, it is needless to say that the present invention is not limited to the pouch type battery cell but may be applied to the prismatic type battery or the cylindrical type battery cell.

The positive electrode lead and the negative electrode lead of the battery cell may be formed on opposite sides, respectively. Thereby, the gripper presses and fixes each of a part of the positive electrode lead and a part of one side of the battery case in which the positive electrode lead is formed, and a part of the negative electrode lead and a part of one side of the battery case in which the negative electrode lead is formed And the like.

The battery cells may be mounted on the tray with the electrode leads arranged in the direction of the side of the tray. The arrangement of the battery cells in the tray may be a structure in which the grippers descend vertically toward the battery cells and easily approach the electrode leads of the battery cells to fix and press the electrode leads.

In one specific embodiment of the present invention, the gripper may include a first gripper for pressing and fixing the positive electrode lead of the battery cell, and a second gripper for pressing and fixing the negative electrode lead of the battery cell.

Specifically, the gripper may have a gripping portion at a portion where the electrode lead of the battery cell is pressed and fixed.

More specifically, the gripper may have a structure including a first lead contact portion contacting one surface of the electrode lead, and a second lead contact portion contacting the other surface of the electrode lead. That is, the first lead contact portion and the second lead contact portion may be formed to face each other with the electrode leads positioned therebetween.

In addition, the sensor may include an optical sensor, a light emitting portion of the optical sensor may be formed on the first lead contact portion, and a light receiving portion of the optical sensor may be formed on the second lead contact portion. Light is emitted from the light emitting portion, and light emitted from the light emitting portion is incident on the light receiving portion.

If the light generated from the light emitting portion is blocked by the electrode lead and is not incident on the light receiving portion in a state where the gripper is in contact with the electrode lead, the contact area where the gripper contacts the electrode lead is sufficiently secured, The battery cell is normally transported.

On the other hand, when the light generated from the light emitting portion is incident on the electrode lead, the contact area between the gripper and the electrode lead is not sufficiently secured. Therefore, the sensor can be bent or bent by the light emitting portion and the light receiving portion And the gripper can move to the electrode lead of the adjacent battery cell without extracting the battery cell from the tray when a signal is transmitted from the sensor.

The sensor may be formed at a position corresponding to an outer end portion of the electrode lead with respect to a center line perpendicular to the paper surface of the electrode lead.

Specifically, the sensor is formed to be spaced apart from the center line of the electrode lead by 20 to 30% of the width of the electrode lead so as to sense the bending or bending area of 30 to 50% of the area of the electrode lead Can be. If the sensor is formed to be spaced apart from the center line of the electrode lead by less than 20% of the width of the electrode lead, even if the sensor is bent or bent exceeding 50% of the area of the electrode lead, It is possible to transfer the battery cell by the gripper, which can not secure the fixing force between the gripper and the battery cell, so that the battery cell may fall down from the gripper during transportation of the battery cell.

Conversely, when the sensor is formed so as to be spaced from the center line of the electrode lead by more than 30% of the width of the electrode lead, bending or bending less than 30% of the area of the electrode lead is generated, There may be a problem that the electrode lead is excessively bent or bent and the electrode lead is moved to the electrode lead of the adjacent battery cell without conveying the battery cell by the gripper although the battery cell can be transferred.

The present invention also provides a battery cell manufactured by the battery cell transfer device.

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 transferring apparatus according to the present invention includes the gripper having a sensor mounted thereon at a portion in contact with the electrode lead, the sensor being capable of detecting whether the electrode lead is bent or bent. In the case where the fixing force between the battery cell and the gripper is enhanced and the electrode lead of the battery cell is bent or bent and the contact area of the gripper with respect to the electrode lead is not sufficiently secured, It is possible to detect whether the battery cell is bent or bent or not.

1 is a vertical sectional view of a battery cell transferring apparatus according to one embodiment of the present invention;
2 is a front view of the battery cell transfer device 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. 1 is a schematic vertical cross-sectional view of a battery cell transferring apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic front view of the gripper of FIG.

Referring to FIG. 1, a battery cell transfer apparatus 100 includes a tray 200 and a gripper 300.

The tray 200 has a rectangular parallelepiped shape, and the battery cells 10 are vertically arranged in a state where their side surfaces are in contact with each other, and are mounted in the tray 200. The positive electrode lead 11 and the negative electrode lead 12 of the battery cell 10 are formed on both opposite sides of the battery cell 10. The electrode lead 11 and 12 of the battery cell 10 are connected to the side surface portion 210 of the tray 200, And is mounted on the tray 200 in a state of being arranged in a direction facing the tray 200.

The gripper 300 includes a first gripper 310 and a second gripper 320. Each of the first gripper 310 and the second gripper 320 is connected to the positive electrode lead 11 of the battery cell 10, A part of one side of the battery case 13 in which a part of the lead 12 and the positive electrode lead 11 and the negative electrode lead 12 are formed is pressed and fixed to vertically lift the battery cell 10, (Not shown in the figure).

The first gripper 310 and the second gripper 320 have a gripping portion at a position where the electrode leads 11 and 12 of the battery cell 10 are pressed and fixed.

Each of the first gripper 310 and the second gripper 320 includes a first lead contact portion 311 that contacts one surface of the electrode leads 11 and 12 and a second lead contact portion 311 that contacts the other surfaces of the electrode leads 11 and 12. [ And a lead contact portion 312.

An optical sensor 400 is mounted on a portion of the first gripper 310 and the second gripper 320 in contact with the electrode leads 11 and 12 to detect whether the electrode leads 11 and 12 are bent or bent .

A light emitting portion 410 is formed on the first lead contact portion 311 and a light receiving portion 420 is formed on the second lead contact portion 312. When the sensor 400 senses bending or bending of the electrode leads 11 and 12 by the light emitting portion 410 and the light receiving portion 420 while the gripper 300 is in contact with the electrode leads 11 and 12, The gripper 300 moves to the electrode lead of the adjacent battery cell without removing the battery cell 10 from the tray 200 when a signal is transmitted from the sensor 400. [

The sensor 400 is formed at a position corresponding to the outer end portion of the electrode leads 11 and 12 with reference to the center line A of the electrode leads 11 and 12. [ More specifically, the sensor 400 detects the bending or bending area of the electrode leads 11, 12 from the center line A of the electrode leads 11, (25%) of the width (W) of the first and second electrodes (12, 13).

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 (15)

A battery cell transfer device for transferring a battery cell to a degassing device for a degas process for removing gas inside the battery cell during a battery production process,
A tray in which a plurality of battery cells are vertically arranged and mounted with their side surfaces facing each other; And
A part of the electrode lead of the battery cell mounted on the tray and a part of one side of the battery case in which the electrode lead is formed are pressed and fixed so that the battery cell is vertically lifted from the paper surface and taken out from the tray, A gripper for feeding the gripper to the gripper;
And,
Wherein a sensor is mounted on a portion of the gripper in contact with the electrode lead to detect whether the electrode lead is bent or bent. The battery cell conveying apparatus according to claim 1, wherein the battery cell is a pouch-shaped battery having a plate-shaped structure. 3. The battery cell conveying apparatus according to claim 2, wherein the positive electrode lead and the negative electrode lead of the battery cell are formed on opposite sides, respectively. The apparatus of claim 3, wherein the battery cells are mounted on the tray with the electrode leads arranged in the direction of the side of the tray. The battery cell feeding device according to claim 4, wherein the gripper comprises a first gripper for pressing and fixing the positive electrode lead of the battery cell, and a second gripper for pressing and fixing the negative electrode lead of the battery cell . The battery cell feeding device according to claim 5, wherein the gripper has a gripping portion at a portion where the electrode lead of the battery cell is pressed and fixed. The battery cell feed device according to claim 6, wherein the gripper includes a first lead contact portion contacting one surface of the electrode lead, and a second lead contact portion contacting the other surface of the electrode lead. The light emitting device according to claim 7, wherein the sensor comprises an optical sensor, a light emitting portion of the optical sensor is formed on the first lead contact portion, and a light receiving portion of the optical sensor is formed on the second lead contact portion. Conveying device. The sensor according to claim 8, wherein, in a state where the gripper is in contact with the electrode lead, the sensor transmits an electrical signal to the gripper when the electrode lead is bent or bent by the light emitting portion and the light receiving portion, Wherein when the signal is transmitted, the battery cell is moved to the electrode lead of the adjacent battery cell without taking out the battery cell from the tray. 2. The battery cell conveying apparatus according to claim 1, wherein the sensor is formed at a position corresponding to an outer end portion of the electrode lead with respect to a center line perpendicular to the sheet surface of the electrode lead. The sensor according to claim 10, wherein the sensor is arranged at a distance of 20 to 30% of the width of the electrode lead from the center line of the electrode lead so as to sense a bending or bending area of 30 to 50% Wherein the battery cell is provided with a battery cell. A battery cell produced by the battery cell transporting apparatus according to any one of claims 1 to 11. 13. The battery cell according to claim 12, wherein the battery cell is a lithium secondary battery. A battery pack comprising at least two battery cells according to claim 13. The device according to claim 14, comprising a battery pack as a power source.

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