KR20170108378A - Apparatus for Transferring Battery Cell in Sliding Manner - Google Patents

Abstract

The present invention relates to a battery cell transfer device for transferring a battery cell to a moisture removal device for a process of removing moisture inside the battery cell during a battery cell production process. The battery cell transfer device includes a tray where a plurality of battery cells are vertically arranged and mounted with their side surfaces facing each other; a transfer part for transferring the tray to the moisture removal device in a state that the tray is located on an upper surface; an elevating part positioned at the lower end of the transfer part and adjusting the vertical position of the transfer part; and a base part coupled to the lower end of the elevating part and having a structure for movement between the processes of the battery cell transfer device. It is possible to easily remove dust or foreign matter.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a sliding-

The present invention relates to a sliding-type battery cell feeder.

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.

Such a pouch-shaped battery cell is transferred to a moisture removing device by a skid bogie, which is a battery cell transfer device, for a process of removing moisture inside the battery cell during a battery cell manufacturing process.

The conventional battery cell conveying apparatus has a structure in which a plurality of battery cells are mounted in a tray, and the tray is transferred to a moisture removing device to transfer the battery cells into the moisture removing device.

The trays on which the battery cells are mounted are located on top of the skid bogies, and the trays are transported by the roller structure formed on the skid bogies.

Conventionally, since the roller structure as described above is made of a metal material, there is a problem that metal dust generated when the tray and the roller are contacted and separated from each other flows into the battery cell. The metal dust flowing into the battery cell causes a low voltage failure of the battery cell.

In addition, since the roller structure is formed in the skid bogie with a structure in which a closed type is not attachable and detachable, it is difficult to clean and remove the generated metal dust by the operator, thereby increasing the amount of metal dust flowing into the battery cell Which led to the problem.

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 method and apparatus for transferring a battery cell having a structure capable of suppressing dust generated in a battery cell transfer device and capable of easily removing dust or foreign matter, Device.

According to an aspect of the present invention,

1. A battery cell transfer device for transferring a battery cell to a water removal device for a process of removing moisture inside the battery cell in a battery cell production process,

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

A transfer unit for transferring the tray to the moisture removal device in a state where the tray is positioned on the upper surface;

An elevating portion located at a lower end of the conveying portion and adjusting a vertical position of the conveying portion; And

A base part coupled to a lower end of the lifting part and having a structure for moving the battery cell transfer device between processes;

As shown in FIG.

In one specific example of the present invention, the conveying unit may have a roller structure so that the tray can be conveyed to the moisture removing apparatus by a sliding method.

Specifically,

A frame having a rectangular shape in which the elevating portion is coupled to the lower end;

At least one bracket extending from one side of the frame to another side opposite thereto and mounted on an upper end of the frame; And

A plurality of rollers mounted on the bracket along the extending direction of the bracket;

As shown in FIG.

The brackets may include a pair of supporting bars spaced apart from each other at a distance corresponding to the length of the roller, and each of the supporting bars may have mounting grooves into which the shafts of the rollers are inserted, .

Therefore, the roller can be detachably attached to the mounting grooves of the bracket, so that even if dust or foreign matter that may occur between the tray and the transfer unit is formed on the bracket or the roller, the roller can be removed from the bracket to facilitate dust or foreign matter Can be removed. Accordingly, dust or foreign matter can be prevented from flowing into the battery cell.

Specifically, the mounting groove may be downwardly bent to a size of 30% to 70% of the thickness of the supporting bar.

If the mounting groove is recessed down to less than 30% of the thickness of the supporting bar, the shaft of the roller may not be fully inserted into the mounting groove and may be structurally unstable. On the other hand, when the mounting groove is downwardly bent beyond the size of 70% of the thickness of the supporting bar, the shaft of the roller is excessively inserted into the mounting groove, and the roller is positioned below the upper surface of the bracket And may not contact the tray.

The supporting bar of the bracket may be composed of a self-oil-active polymer material or a self-oil-activating polymer material, at least the mounting groove on which the shaft is contacted.

Further, the supporting bar of the bracket may be made of a self-oil-active polymer material. As described above, since the supporting bar of the bracket is made of a self-oil-active polymer material, the dust generated due to the frictional force between the bracket and the roller can be suppressed.

As a specific example of the roller,

A rolling section for contacting the tray to transport the tray to the water removal device; And

A shaft protruded from both ends of the rolling portion in a state where the rolling portion penetrates in the longitudinal direction and inserted into the mounting grooves of the bracket;

As shown in FIG.

At least the outer surface of the rolling part may be formed of a self-oil-active polymer material or may be coated with a self-oil-active polymer material.

More specifically, the material of the self-oil-active polymer may be MC-Nylon (Mono Cast Nylon), but may be formed between the bracket and the roller or between the roller and the tray and the rollers. The present invention is not limited to this, as long as it is a material capable of suppressing dust generated due to frictional force.

Since the roller portion of the roller is made of a self-oil-active polymer material, the dust generated due to the frictional force between the tray and the roller can be suppressed.

The diameter of the shaft may be 50% to 70% of the diameter of the rolling part. When the diameter of the shaft is less than 50% of the diameter of the rolling part, the diameter of the shaft mounted on the mounting groove of the bracket becomes small, which may make the structure unstable. On the other hand, when the diameter of the shaft is larger than 70% of the diameter of the rolling part, the mounting groove formed in the bracket must be formed large and the contact area between the bracket and the shaft is increased, It is possible to increase the possibility of

The battery cell may be a pouch-shaped battery cell 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 a specific example of the elevating portion, the elevating portion may have a bellows structure. Accordingly, the vertical position of the transfer section can be easily adjusted, and the operator can easily position the tray on the upper surface of the transfer section.

As a specific example of the base portion, a plurality of wheels for moving the process of the battery cell transfer device may be mounted on the lower end of the base portion. Accordingly, the battery cell transfer device can be easily moved according to the progress of the battery cell process.

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

The type of the battery cell is not particularly limited, but it may be a lithium secondary battery such as a lithium ion battery or a lithium ion polymer battery having advantages such as high energy density, discharge voltage, and output stability.

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, according to the present invention, since the roller is removably attachable to the mounting grooves of the bracket, even if dust or foreign matter that may occur between the tray and the conveying unit is formed on the bracket or the roller, The dust or foreign matter can be easily removed from the bracket.

In addition, by forming the rolling parts of the supporting bars and the rollers of the bracket from the oil-active polymer material, it is possible to suppress the dust generated due to the frictional force between the bracket and the roller and the dust generated by the frictional force between the tray and the roller. So that dust or foreign matter can be prevented from flowing into the battery cell.

1 is a side view of a battery cell transfer device according to one embodiment of the present invention;
2 is a top view of the battery cell transfer device of FIG. 1;
3 is a number plan view of the transfer part of the battery cell transfer device of Fig. 1;
Figure 4 is a vertical cross-sectional view of the transfer part of Figure 3;
5 is a side view of the roller of the battery cell conveying device of Fig. 1;

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 side view of a battery cell transfer device according to an embodiment of the present invention. FIG. 2 is a schematic top view of the battery cell transfer device of FIG. 1, 4 is a schematic vertical cross-sectional view of the conveyance unit of FIG. 3, and FIG. 5 is a cross-sectional view of the conveying unit of the battery cell conveying apparatus of FIG. Are schematically shown.

1 to 5, the battery cell transfer apparatus 10 includes a tray 100, a transfer unit 200, a lifting unit 300, and a base unit 400.

The tray 100 has an open top shape, and a plurality of battery cells 110 are vertically arranged in a state where their side surfaces are in contact with each other.

The transfer unit 200 transfers the tray 100 to a moisture removal device (not shown) while the tray 100 is positioned on the upper surface.

The transfer unit 200 has a roller structure so that the tray 100 can be transferred to the water removal apparatus by a sliding method.

Specifically, the transfer unit 200 includes a frame 210, brackets 220, and rollers 230.

The bracket 220 is mounted on the upper end of the frame 210 and is connected to the bracket 220 along the extending direction of the bracket 220. The bracket 220 is mounted on the upper end of the frame 210, And a plurality of rollers 230 are mounted on the roller 220.

The brackets 220 include a pair of supporting bars 221 spaced apart from each other by an interval W corresponding to the length of the roller 230. Each of the supporting bars 221 is provided with a shaft 232 are inserted into the mounting grooves 222, respectively.

The mounting groove 222 is downwardly directed to a size (T2) of 50% of the thickness T1 of the supporting bar 221.

The supporting bar 221 is made of a self-oil-active polymer material, thereby suppressing dust generated due to the frictional force between the supporting bar 221 and the roller 230.

The roller 230 is composed of a rolling portion 231 and a shaft 232. The rolling part 231 contacts the tray 100 to transfer the tray 100 to the water removal device and the shaft 232 protrudes from both ends of the rolling part in a state of passing the rolling part 231 in the longitudinal direction And is mounted to the mounting groove 222 of the bracket 220.

The diameter D2 of the shaft 232 is 50% of the diameter D1 of the rolling portion 231. [

The rolling part 231 is made of a polymer material that is self-oil-activating, and dust generated due to frictional force between the tray 100 and the rolling part 231 can be suppressed.

The elevation part 300 is made of a bellows structure so that the vertical position of the conveyance part 200 can be easily adjusted and the operator can easily place the tray 100 on the upper surface of the conveyance part 200.

At the lower end of the base part 400, a plurality of wheels 410 for moving between the processes of the battery cell transfer device 10 are mounted. Accordingly, the battery cell transferring apparatus 10 can be easily moved in accordance with the progress of the battery cell process.

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)

1. A battery cell transfer device for transferring a battery cell to a water removal device for a process of removing moisture inside the battery cell in a battery cell production process,
A tray in which a plurality of battery cells are vertically arranged and mounted with their side surfaces facing each other;
A transfer unit for transferring the tray to the moisture removal device in a state where the tray is positioned on the upper surface;
An elevating portion located at a lower end of the conveying portion and adjusting a vertical position of the conveying portion; And
A base part coupled to a lower end of the lifting part and having a structure for moving the battery cell transfer device between processes;
Wherein the battery cell transfer device comprises: The apparatus of claim 1, wherein the transfer unit comprises a roller structure so that the tray can be transferred to the water removal unit by a sliding method. The image forming apparatus according to claim 2,
A frame having a rectangular shape in which the elevating portion is coupled to the lower end;
At least one bracket extending from one side of the frame to another side opposite thereto and mounted on an upper end of the frame; And
A plurality of rollers mounted on the bracket along the extending direction of the bracket;
And a plurality of battery cells. [5] The apparatus of claim 3, wherein the brackets include a pair of supporting bars spaced apart from each other at a distance corresponding to the length of the roller, and each of the supporting bars has mounting grooves Wherein the openings are formed in an upward opening structure. The apparatus of claim 4, wherein the mounting groove is downwardly bent to a size of 30% to 70% of the thickness of the supporting bar. [5] The apparatus of claim 4, wherein the supporting bar of the bracket is formed of a self-oil-active polymer material or a self-oil-active polymer material. The apparatus of claim 6, wherein the support bar of the bracket is made of a polymer material having a self-oil-activating property. 5. The apparatus according to claim 4,
A rolling section for contacting the tray to transport the tray to the water removal device; And
A shaft protruded from both ends of the rolling portion in a state where the rolling portion penetrates in the longitudinal direction and inserted into the mounting grooves of the bracket;
The battery cell transferring device comprising: The apparatus of claim 8, wherein at least the outer surface of the rolling part is formed of a self-oil-activating polymer material or a self-oil-activating polymer material. [10] The apparatus of claim 9, wherein the rolling unit is made of a polymer material that is self-oil-active. [10] The apparatus of claim 7 or 10, wherein the self-oil-active polymer material is MC-Nylon (Mono Cast Nylon). The battery cell conveying device according to claim 1, wherein the battery cell is a pouch-shaped battery cell having a plate-like structure. The apparatus of claim 1, wherein the lifting unit comprises a bellows structure. [2] The apparatus of claim 1, wherein a plurality of wheels for moving the process of the battery cell transfer device are mounted on the lower end of the base. A battery cell manufactured using the battery cell transfer device according to claim 1. A battery pack comprising at least two battery cells according to claim 15. A device as claimed in claim 16 comprising a battery pack as a power source.

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