KR20190069099A - Battery pack - Google Patents

Abstract

A battery pack of the present invention comprises: a plate-shaped battery cell including a cell body and a terrace unit extending upward from the cell body and having one pair of electrode leads outwardly projecting through the terrace unit; a protective circuit board (PCB) mounted on top of the terrace unit in a state of being connected to the electrode leads; and an insulating label setting the top of the terrace unit on which the PCB is mounted as a space isolated from the outside in a state of being glued over the terrace unit and the cell body. The insulating label is provided with two or more support plates forming an outer shape of the space.

Description

Battery pack {BATTERY PACK}

The present invention relates to a battery pack in which a PCB mounting space is set by a relatively economical insulating label instead of a PCM case having a high manufacturing cost.

2. Description of the Related Art [0002] As technology development and demand for mobile devices have increased, the demand for secondary batteries as energy sources has rapidly increased. In particular, lithium secondary batteries having high energy density and discharge voltage among secondary batteries have been researched and commercialized have.

Typically, in view of the shape of the battery, there is a high demand for a prismatic secondary battery and a pouch-type secondary battery that can be applied to products such as mobile phones with a small thickness. In terms of materials, lithium ion batteries having high energy density, discharge voltage, There is a high demand for a lithium secondary battery such as a lithium ion polymer battery.

Such a secondary battery can 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.

1 schematically shows a general structure of a lithium ion battery cell including a stacked electrode assembly.

1, the lithium ion battery cell 10 includes an electrode assembly 30 including a positive electrode, a negative electrode, and a separator disposed between the positive and negative electrodes and a pouch-type battery case 20, And the negative electrode 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 cover 22 to which one side is connected.

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 battery cell 10 is manufactured by placing the electrode assembly 30 on the housing part 23 and then covering the cover 22 and thermally fusing the outer periphery of the contact area with the case body 21. The positive electrode tabs 31, (Or " the terrace portion of the battery cell ") is formed at the sealing portion where the cathode tabs 32 and the cathode tabs 32 are located.

On the other hand, lithium secondary batteries have a variety of combustible materials, and they have a disadvantage in terms of safety because of the danger of overheating, overcurrent, other physical external impact, and the like. Therefore, a lithium secondary battery is a safety element that can effectively control an abnormal state such as overcharging and overcurrent, and is a battery pack in which a PTC (Positive Temperature Coefficient) element, a protection circuit module (PCM) Structure.

Here, the battery pack refers to a circuit for controlling the operation of the battery cell, and a module packaged for an external system in which the battery pack is used after the module is mounted on the battery cell.

A general structure of such a battery pack is shown in Fig.

2, the battery pack 50 has a structure in which the protection circuit module 60 is mounted on the upper portion of the battery cell 10. More specifically, the protection circuit module 60 includes the electrode leads 40 and 41 The electrode leads 40 and 41 are folded in a state of being electrically connected to the outer periphery 11 of the battery case.

The protection circuit module 60 has a structure in which a protection circuit board 52 electrically connected to the electrode leads 40 and 41 is embedded in the module case 51. The module case 51 is formed by plastic injection molding It is common to be manufactured.

However, since the module case manufactured by injection molding takes a large portion of the production cost of the battery pack, it can weaken the price competitiveness.

In addition, considering the time required for injection molding, the manufacturing process of the battery pack may be slowed down, and this problem is also recognized as a problem to be solved.

Therefore, there is a high need for techniques that can solve the 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 of manufacturing a module, which is relatively expensive and requires a long time to be manufactured, using a dielectric label that is relatively inexpensive and can shorten the assembling process by simple attachment, And to provide a battery pack having an isolated and accommodated structure.

According to another aspect of the present invention, there is provided a battery pack comprising: a cell body; A protective circuit board (PCB) mounted on the top of the terrace portion in a state of being connected to the electrode lead; And an insulating label that sets an upper end of the terrace portion on which the protection circuit board is placed as an isolated space from the outside while being adhered to the terrace portion and the cell main body, Wherein at least two support plates are provided to form an outer shape of the outer plate.

In other words, the battery pack according to the present invention is relatively inexpensive and has a relatively low cost, as compared with a conventional battery pack using a module case which is relatively expensive and takes a long time to manufacture, In addition, it is required to simply attach the insulation label to the above-mentioned isolation and storage, thereby improving the manufacturing processability.

In addition, the support plates complement the mechanical rigidity of the flexible insulating label, so that the mounting stability of the protection circuit board against external impact can be secured.

The support plates may be made of an electrically insulating polymer material. The electrically insulating polymer material may be a polymer resin or a polymer blend known in the art such as polyurethane, polyethylene, polypropylene, and polycarbonate.

The thickness of the support plates may be at least 1 millimeter to withstand external impacts and may be less than 10 millimeters so that the support plates do not occupy an excessive volume at the top of the formed battery pack.

The support plates may include a first plate and a second plate, the upper and lower surfaces of which are adjacent to each other so as to face the same direction, and the lower surface is attached to the insulating label.

Wherein the insulating label includes a first cell adhesion surface and a second adhesion surface to which the first plate and the second plate are not attached and the first adhesion surface is bonded to the outer surface of the terrace portion, 2 adhesive surface can be adhered to the outer surface of the cell body parallel to the outer surface of the terrace portion.

The insulating label may be attached to an outer surface of the terrace portion and an outer surface of the cell body in a state where the upper surface of the first plate is facing the cell body and the upper surface of the second plate is bent so as to face the inner surface of the terrace portion. .

Accordingly, the first plate and the second plate may be substantially perpendicular to each other, and the first plate, the second plate, the inner surface of the upper end of the terrace portion, and the cell body may form the inner walls of the space. have.

The space may be filled with an electrically insulating filler, and the filler may be a polymer resin such as urethane foam, polyethylene, or polypropylene. The filler can prevent the insulating label in the attached state from being crushed and the external impact can be mitigated to prevent breakage of the protection circuit board.

The insulating label may further include third adhesive surfaces which are adhered to both sides of the plate-shaped battery cell adjacent to the outer surface of the cell body.

At least one first slit through which an external input / output terminal connected to the protection circuit board is drawn is formed in the first plate or the second plate, and at least one first slit is formed in the insulating label at a position corresponding to the first slit, The second slit of the second slit may be perforated.

Meanwhile, in the plate-shaped battery cell, an electrode assembly including a positive electrode, a negative electrode, and a separator is built in a battery case of a laminate sheet including a resin layer and a metal layer together with an electrolyte, and the outer periphery of the battery case is sealed The terrace portion may be an outer periphery where the electrode leads are located and the remaining outer periphery except the terrace portion may be bent toward the cell main body. The outer peripheries bent in the direction of the cell body can substantially form both sides of the plate-shaped battery cell.

The plate-shaped battery cell is not particularly limited in its kind, but specific examples thereof include a lithium ion (Li-ion) secondary battery having a high energy density, a discharge voltage and an output stability, a lithium polymer (Li- A secondary battery, or a lithium secondary battery such as a lithium ion polymer secondary battery.

The battery pack described above can be used as an energy source for a mobile device such as a mobile phone, a notebook computer, or a power device such as an electric bicycle, an electric vehicle, or a hybrid vehicle, or an electronic device such as the mobile device or the power device.

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 current collector is generally made to have a thickness of 3 to 500 micrometers. Such a positive electrode current collector is not particularly limited as long as it has high conductivity without causing chemical change in the battery, and may be formed of a material such as stainless steel, aluminum, nickel, titanium, sintered carbon, or a surface of aluminum or stainless steel Treated with carbon, nickel, titanium, silver or the like may be used. The positive electrode current collector may have fine unevenness on the surface thereof to increase the adhesive force of the positive electrode active material, and various forms such as a film, a sheet, a foil, a net, a porous body, a foam, and a nonwoven fabric are possible.

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.

The negative electrode collector is generally made to have a thickness of 3 to 500 micrometers. Such an anode current collector is not particularly limited as long as it has conductivity without causing chemical change in the battery, and may be formed of a material such as copper, stainless steel, aluminum, nickel, titanium, fired carbon, surface of copper or stainless steel A surface treated with carbon, nickel, titanium, silver or the like, an aluminum-cadmium alloy, or the like can be used. In addition, like the positive electrode collector, fine unevenness can be formed on the surface to enhance the bonding force of the negative electrode active material, and it can be used in various forms such as films, sheets, foils, nets, porous bodies, foams and nonwoven fabrics.

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

The electrolytic solution may be a non-aqueous electrolytic solution containing a lithium salt, and is composed of a non-aqueous electrolytic solution and a lithium salt. As the non-aqueous electrolyte, non-aqueous organic solvents, organic solid electrolytes, inorganic solid electrolytes, and the like are used, but the present invention is not limited thereto.

Examples of the non-aqueous organic solvent 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 nonaqueous electrolytic solution is preferably a solution prepared by dissolving or dispersing in a solvent such as pyridine, triethylphosphite, triethanolamine, cyclic ether, ethylenediamine, glyme, hexaphosphoric triamide, N, N-substituted imidazolidine, ethylene glycol dialkyl ether, ammonium salt, pyrrole, 2-methoxyethanol, aluminum trichloride and the like may be added have. In some cases, halogen-containing solvents such as carbon tetrachloride and ethylene trifluoride may be further added to impart nonflammability. In order to improve the high-temperature storage characteristics, carbon dioxide gas may be further added. FEC (Fluoro-Ethylene Carbonate, PRS (Propene sultone), and the like.

In one specific _{example, LiPF 6, LiClO 4, LiBF} 4, LiN (SO 2 CF 3) 2 , such as a lithium salt, a highly dielectric solvent of DEC, DMC or EMC Fig solvent cyclic carbonate and a low viscosity of the EC or PC of And then adding it to a mixed solvent of linear carbonate to prepare a lithium salt-containing non-aqueous electrolyte.

As described above, in the battery pack according to the present invention, in comparison with the conventional battery pack using the module case which is relatively expensive and takes a long time to manufacture, the insulating label, which is relatively inexpensive, Since the board is isolated and housed, the manufacturing cost of the battery pack is relatively economical. In particular, a simple attachment process of the insulating label is required for the isolation and storage structure, and the manufacturing processability is improved.

In addition, the support plates complement the mechanical rigidity of the flexible insulating label, thereby ensuring the structural stability of the protection circuit board against external impacts.

1 is a schematic view of a battery cell according to the prior art.
2 is a schematic view of a conventional battery pack.
3 is a schematic view of a battery pack according to an embodiment of the present invention.
4 is a schematic plan view of an insulating label.
FIG. 5 is a vertical cross-sectional view of the top of the battery pack adjacent to the terrace portion in the battery pack of FIG. 3;
6 is a vertical sectional view of the top of a battery pack according to another embodiment of the present invention.
7 is a vertical sectional view of the top of a battery pack according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, the well-known functions or constructions will not be described in order to clarify the present invention.

In order to clearly illustrate the present disclosure, portions that are not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification. In addition, since the sizes and thicknesses of the individual components shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited thereto.

3 is a schematic view of a battery pack according to an embodiment of the present invention.

FIG. 4 is a plan view of the insulation label, and FIG. 5 is a vertical sectional view of the top of the battery pack adjacent to the terrace portion of the battery pack of FIG.

The battery pack according to one embodiment of the present invention will be described in detail with reference to these drawings.

The battery pack 100 may include a plate-shaped battery cell 110, a protection circuit board 120, and an insulating label 130.

The plate-shaped battery cell 110 may include a cell body 112 and a terrace portion (118 in FIG. 5) extending upward from the cell body 112.

The plate-shaped battery cell 110 has a structure in which an electrode assembly (not shown) and an electrolytic solution are embedded in a battery case of a soft laminated sheet, and the outer peripheries 116 and 118 of the laminated sheet are heat- . In addition, the electrode leads 101 may be led outward through the outer periphery 118 located in the upper direction among the outer periphery 116 and 118.

Here, a housing portion corresponding to the outer shape of the substantially rectangular and plate-shaped electrode assembly is formed in the battery case. In the present invention, the outer portion corresponding to the outer shape of the electrode assembly in the sealed battery case is defined as the cell main body 112 .

The outer periphery 118 extending from the cell main body 112 and leading to the electrode leads 101 is defined as a terrace portion 118.

The outer peripheries 116 located on both sides with respect to the terrace portion 118 can be bent in the direction of the cell body 112. The outer peripheries 116 bent in the direction of the cell body 112 can form substantially both sides 114 of the plate-shaped battery cell 110.

The outer peripheries 116 bent in the direction of the cell body 112 can also be adhered to the cell body 112 by means of hot melt resin or adhesive or the like in a state of being completely in close contact with the cell body 112.

As described above, both side surfaces 114 of the plate-shaped battery cell 110 are formed on both side surfaces of the cell body 112. Therefore, the outer surface 116 of the battery cell 110 can be formed as a part of the outer periphery corresponding to the outer shape of the electrode assembly, .

The protection circuit board 120 may be seated on the upper end 144 of the terrace portion 118 while being connected to the electrode leads 101. [

The insulating label 130 may be adhered across the terrace portion 118 and the cell body 112. The insulating label 130 is adhered to the terrace portion 118 and the cell body 112 so that the upper end 144 of the terrace portion 118 on which the protection circuit board 120 is placed is separated from the space 150 ).

The insulative label 130 is provided with support plates 131 and 132 forming an outer shape of the space 150.

The support plates 131 and 132 are arranged adjacent to each other so that the upper surfaces of the support plates 131 and 132 face the same direction and the lower surface includes a first plate 131 and a second plate 132 attached to the insulating label 130 .

The insulating label 130 may include a first adhesive surface 134 and a second adhesive surface 136 on which the first plate 131 and the second plate 132 are not attached. The first adhesive surface 134 is bonded to the outer surface 142 of the terrace portion 118 and the second adhesive surface 136 is bonded to the outer surface 142 of the cell body 112 parallel to the outer surface 142 of the terrace portion 118 As shown in Fig.

Herein, the outer surface of the cell body 112 refers to a surface exposed to the outside among the surfaces of the cell body 112, but has the widest planar area in a narrow sense, And in a narrower sense may refer to the upper and lower surfaces of the cell body 112 having the widest planar and parallel to each other.

The upper surface of the cell body 112 may be a surface that is relatively spaced from the terrace portion 118 and the lower surface of the cell body 112 may be a surface that is relatively adjacent to the terrace portion 118.

Bonded to the outer surface of the cell body 112 parallel to the outer surface 142 of the terrace portion 118 may be adhered to the upper surface of the cell body 112 that is relatively spaced from the terrace portion 118 .

The upper surface of the first plate 131 faces the cell body 112 and the upper surface of the second plate 132 is bent to face the inner surface of the terrace portion 118, And may be attached to the outer surface of the cell body 112.

The first plate 131 and the second plate 132 are substantially perpendicular to each other and the first plate 131 and the second plate 132, the inner surface 144 of the terrace portion 118, Thereby forming the inner walls of the space 150.

The insulating label 130 also includes third adhesive surfaces 114 adhered to both sides 114 of the plate-like battery cell 110 adjacent to the outer surface of the cell body 112, And the space 150 may be completely isolated from the outside while the third adhesive surfaces 138 are adhered.

6 is a vertical cross-sectional view of the top of a battery pack according to another embodiment of the present invention.

Referring to FIG. 6, a first slit 201 through which the external input / output terminal 200 connected to the protection circuit board 220 is inserted is formed in the first plate 231. In the insulating label 230, the second slit 202 is formed at a position corresponding to the first slit 201.

Accordingly, the first slit 201 and the second slit 202 are communicated at the same position, and the first slit 201 and the second slit 202 are connected to each other through the external input / output terminal 200, for example, an FFC The cable can be led out.

7 is a vertical cross-sectional view of the top of a battery pack according to another embodiment of the present invention.

Referring to FIG. 7, a space in which the protection circuit board 310 is housed may be filled with an electrically insulating filler 350.

The filler 350 may be, for example, a polymer resin such as urethane foam, polyethylene, or polypropylene.

The filler 350 can prevent the insulating label 330 from being crushed and can prevent the protection circuit board 310 from being damaged by alleviating the external impact.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is obvious to those who have. Accordingly, it should be understood that such modifications or alterations should not be understood individually from the technical spirit and viewpoint of the present invention, and that modified embodiments fall within the scope of the claims of the present invention.

Claims (10)

A plate-shaped battery cell including a cell body and a terrace portion extending upward from the cell body, wherein a pair of electrode leads project outwardly through the terrace portion;
A protective circuit board (PCB) mounted on the top of the terrace portion in a state of being connected to the electrode lead; And
An insulation label which sets the upper end of the terrace portion on which the protection circuit board is placed as a space isolated from the outside in a state of being glued over the terrace portion and the cell main body;
Lt; / RTI &gt;
Wherein the insulating label is provided with at least two support plates forming an outer shape of the space. The method according to claim 1,
The support plates,
Wherein the first plate and the second plate are disposed adjacent to each other so that the upper surfaces face the same direction and the lower surface is attached to the insulating label. 3. The method of claim 2,
The insulating label may be formed by,
And a first cell adhesion surface and a second adhesion surface on which the first plate and the second plate are not attached,
Wherein the first adhesive surface is bonded to the outer surface of the terrace portion and the second adhesive surface is bonded to the outer surface of the cell body parallel to the outer surface of the terrace portion. The method of claim 3,
The insulating label may be formed by,
The upper surface of the first plate facing the cell body,
Wherein an upper surface of the second plate is attached to an outer surface of the terrace portion and an outer surface of the cell body in a bent state so as to face the inner surface of the terrace portion. The method of claim 3,
The insulating label may be formed by,
And a third adhesive surface bonded to both sides of the plate-shaped battery cell adjacent to the outer surface of the cell body. 3. The method of claim 2,
The first plate or the second plate is provided with a first slit through which an external input / output terminal connected to the protection circuit board is led,
Wherein the insulative label has a second slit punctured at a position corresponding to the first slit. The method according to claim 1,
The plate-shaped battery cell includes:
A battery case of a laminate sheet including a resin layer and a metal layer has a structure in which an outer periphery of a battery case is thermally fused and sealed in a state in which an electrode assembly including an anode, a cathode,
Wherein the terrace portion is an outer periphery where the electrode leads are located and the remaining outer periphery except for the terrace portion is bent toward the cell main body. The method according to claim 1,
Wherein the space is filled with an electrically insulating filler. The method according to claim 1,
Wherein the support plates are made of an electrically insulating polymer material. An electronic device comprising the battery pack of claim 1.

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