KR20180092592A - Secondary Battery Pack Comprising Enforcement Tape - Google Patents

Abstract

Provided is a secondary battery pack with a structure that outer peripheral ends of a battery case are sealed. The secondary battery pack comprises: a battery cell having an electrode assembly housed in the battery case and a structure that an electrolyte is isolated from the outside; a reinforced tape attached to at least one of outer circumferential ends of the battery cell to suppress outer peripheral deformation of the battery case; a plastic resin part cured on outer peripheral ends of the battery cell to form a molding; and an open frame surrounding the battery cells along the outer peripheral ends together with the plastic resin part.

Description

[0001] The present invention relates to a secondary battery pack including a reinforcing tape,

The present invention relates to a secondary battery pack including a reinforcing tape.

Due to the development of technology and demand for mobile devices, the demand for secondary batteries is also rapidly increasing. Among them, lithium secondary batteries, which have high energy density, high operating voltage and excellent storage and life characteristics, It is widely used as an energy source.

The secondary battery may be used in a detachable structure that is free to be inserted or removed depending on the type of external equipment to which the secondary battery is to be used, or may be used as a built-in structure in which the secondary battery is embedded in an external device. For example, devices such as notebooks can insert and leave batteries according to the user's needs, while devices such as some phones, MPEG Audio Layer-3 (MP3), tablet PCs, smart pads, etc., The use of built-in battery packs is also a problem.

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 connected to a battery cell such as a PTC (Positive Temperature Coefficient) element and a protection circuit module (PCM) as a safety element that can effectively control an abnormal state such as overcharging or overcurrent.

Since such a secondary battery is preferably manufactured with a small size and weight, a prismatic battery or a pouch-type battery having a small weight to capacity ratio is mainly used as a battery cell of a secondary battery. Particularly, a pouch-shaped battery using an aluminum laminate sheet or the like as an exterior member has recently attracted a great deal of attention due to its advantages such as low weight and low manufacturing cost.

When a pouch type battery cell is used to construct a battery pack, a PCM is connected to an electrode of the battery cell while the battery cell is mounted on the case, and a label is attached to the outer surface of the case, Pack. In this case, for example, an assembly structure of the upper cover and the lower cover for covering the outer surface of the battery cell, or a frame structure for fixing the edge portion of the battery cell is used.

However, a need for a battery cell that is more compact and improved in structural stability has been increased, and a method of wrapping the outer periphery of the battery cell with the frame through a hot-melting method has been used.

The secondary battery pack includes a battery cell in which an electrolyte and an electrode assembly are embedded in a pouch-shaped battery case, which is a soft packaging material, and the battery cells are connected to an open frame After mounting, the outer periphery is covered with hot-melt resin.

Particularly, in the secondary battery pack, hot-melting resin is applied between the protective circuit board and the outer periphery of the battery cell, and the joint between the electrode terminal of the battery cell and the protection circuit board, .

However, when a pressure is applied to the outer peripheral portion where the electrode terminals are formed, the electrode tabs are formed inside the battery case corresponding to the outer peripheral portions, The bonding portions of the electrode leads or the bonding portions of the electrode tabs may be crushed and defective, and further, the electrode plates of the electrode assembly may be deformed, resulting in safety problems such as ignition or explosion.

Accordingly, a need exists for a technique capable of solving these problems.

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

Specifically, it is an object of the present invention to provide a secondary battery pack having a structure in which a reinforcing tape is attached to an outer peripheral end portion of the resin to relieve a pressure applied to the inside of the battery cell.

In order to achieve the above object, a secondary battery pack according to the present invention includes a battery cell having a structure in which outer peripheral ends of a battery case are sealed, an electrode assembly housed in the battery case, and a structure in which an electrolyte is isolated from the outside;

A reinforcement tape attached to at least one of the outer circumferential ends of the battery cell to suppress outer peripheral deformation of the battery case;

A plastic resin part cured on outer peripheral ends of the battery cell to form a molding; And

And an open frame surrounding the battery cell along outer peripheral ends together with the plastic resin part.

Therefore, in the secondary battery pack according to the present invention, the reinforcing tape attached to the outer circumferential end portion maintains the bent shape of the outer circumferential end where the shape is likely to collapse, and the pressure due to the plastic resin portion is buffered, And the electrode, the electrode tab, the electrode terminal, and the like can be prevented from being deformed or damaged.

In the present invention, the battery case may be a pouch-shaped battery case made of a flexible laminate sheet,

A housing depression for accommodating the electrode assembly and the electrolyte;

Sealing outer peripheries extending outwardly from the receiving recess; And

A cover portion joined to the outer periphery of the sealing to form outer peripheral ends of the battery case together with the periphery of the sealing and to seal the accommodation recess portion;

As shown in FIG.

In this structure, the outer peripheral ends may include first outer peripheral ends to which the positive and negative terminals are led, and second outer peripheral ends that are outer peripheral ends except for the first outer peripheral end.

Wherein the second outer peripheral ends of the secondary battery pack are bent in the outer surface direction of the accommodation recess portion;

The first outer peripheral end portion is bent in the outer surface direction of the accommodation recess portion together with the positive electrode terminal and the negative electrode terminal;

The reinforcing tape may have a structure in which the reinforcing tape is attached to the first outer peripheral end except for the positive terminal and the negative terminal and the outer surface of the accommodating recess adjacent to the first outer peripheral end.

The width of the reinforcing tape attached to the outer surface of the storage recessed portion may be 80% to 100% of the recessed depth of the storage recessed portion. In some cases, when the storage tape is attached to the outer surface of the storage recessed portion, The battery case may be attached to the outer surface of the battery case.

If the width of the reinforcing tape is less than 80% of the indentation depth of the indentation portion, the pressure applied to the indentation indentation is not relaxed.

The reinforcing tape maintaining a folded shape of the first peripheral end;

The plastic molding portion may be formed between the first outer circumferential end where the shape is maintained and the storage recess portion.

In this structure, the reinforcing tape can relieve the pressure of the plastic portion from being applied to the inside of the accommodation recess portion, before the plastic portion is cured.

In one specific example, the secondary battery pack further includes a protective circuit board electrically and physically coupled to the positive and negative terminals, a battery cell, a plastic resin part, a protective circuit board, and an insulating label that integrally surrounds the open frame .

The physical connection means that the electrode terminal and the metallic connection plate formed on the protection circuit board are joined by welding or soldering or the like and means that the electrode terminal and the protection circuit board are in contact with each other in such a manner that current can be passed between them do.

The protective circuit board may be positioned parallel to the first outer circumferential end and may form a molding between the reinforcing tape adhered to the protective circuit board and the recessed depressed portion.

In the present invention, the reinforcing tape is not particularly limited as long as it is a rigid metal tape, but it may be, for example, a metal tape containing at least one selected from stainless steel, nickel, aluminum and copper.

The reinforcing tape may also have a thickness of 0.01 mm to 1 mm.

When the thickness of the reinforcing tape is less than 0.01 mm, it is difficult to expect the effect of shape fixing and pressure relaxation on the outer peripheral end portion, and when the thickness exceeds 1 mm, the size of the secondary battery pack is increased.

The plastic resin part is not limited as long as it can effectively maintain the sealing property, but it is applied to the adhesive agent in a liquid state at a high temperature without using water or a solvent at all, And a hot-melt resin exhibiting hardness.

The hot-melt resin exhibits a very high water resistance, and is also preferable in view of safety of a battery cell because it also provides an effective water tightness in a battery cell in which moisture penetration is critical.

Since the hot-melt resin is cured without requiring a drying process, the sealing of the battery cell can be performed by a potting method that enables automation of the production line and increase of productivity.

The potting method has an advantage that it has considerable economical efficiency such as a reduction in the amount of raw materials due to the improvement of the process speed, the reduction of labor costs, and the ease of controlling the amount of coating.

For reference, in the present invention, THERMELT 861 manufactured by BOSTICK Co., Ltd. is used as a sealing member as a hot-melt resin, but the present invention is not limited thereto, and various hot-melt resins already commercialized may be used.

The present invention also provides a method of manufacturing the secondary battery pack.

Specifically, the method includes the steps of attaching a reinforcing tape across the first peripheral edge and the recessed indentation, bending the first peripheral edge together with the positive terminal and the negative terminal in the direction of the outer surface of the adjacent recessed indentation;

Bending the second outer peripheral ends in the direction of the outer surface of the adjacent recessed depressed portion;

A process of mounting an open frame to a battery cell;

Injecting hot-melt resin between the first outer circumferential end portions bent and the outer circumferential surface of the storage recess portion to form a molding of the plastic resin portion; And

Hot-melt resin is injected between the second outer circumferential end portions and the outer peripheral surface of the accommodation recess portion and between the second outer circumferential end portions and the inner surface of the open frame so as to enclose the bent outer circumferential end portions, ;

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The reinforcing tape can relieve the pressure caused by the injection of the hot-melt resin, thereby preventing breakage of the electrode assembly located inside the accommodation recess.

The method may further comprise:

Further comprising joining the protection circuit board to the positive electrode terminal and the negative electrode terminal by welding or soldering and bending the positive electrode terminal and the negative electrode terminal so that the protection circuit board is adjacent to the reinforcing tape attached to the accommodation recess portion;

A hot-melt resin may be further injected between the protective circuit board and the reinforcing tape attached to the accommodation recess portion, and the molding may be formed while being cured.

The battery cell of the present invention may be a lithium-ion secondary battery, a lithium-polymer secondary battery, or a lithium-ion polymer battery having advantages of high energy density, discharge voltage, ion polymer secondary battery or the like.

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. The positive electrode current collector and the elongate current collector are not particularly limited as long as they have high conductivity without causing a chemical change in the battery, and examples thereof include stainless steel, aluminum, nickel, titanium, A surface treated with carbon, nickel, titanium, or silver on the surface of stainless steel may be used. The anode current collector and the elongate current collector may have various shapes such as a film, a sheet, a foil, a net, a porous body, a foam, a nonwoven fabric, or the like by forming fine irregularities on the surface thereof to increase the adhesive force of the cathode active material.

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 secondary battery pack according to the present invention, the reinforcing tape attached to the outer circumferential end portion maintains the bent shape of the outer circumferential end where the shape is likely to collapse, while buffering the pressure due to the plastic resin portion, So that deformation and breakage of the electrode, the electrode tab, the electrode terminal, etc. located inside the case can be prevented.

1 is a schematic view of a secondary battery pack according to an embodiment of the present invention;
2 is a schematic view of a battery cell constituting a secondary battery pack;
3 is a schematic view of a mounting structure of a reinforcing tape.

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

FIG. 1 is a schematic diagram of a secondary battery pack 100 according to an embodiment of the present invention.

2 and 3 schematically show the mounting structure of the battery cell 110 and the reinforcing tape 150 constituting the secondary battery pack 100. As shown in Fig.

Referring to these figures together, the secondary battery pack 100 has an electrode assembly (not shown) housed in the battery case 112 with a structure in which outer peripheral ends 114 and 116 of the battery case 112 are sealed, A reinforcing tape 150 for suppressing the outer peripheral deformation of the battery case 112 in a state where the battery cell 110 is attached to the outer peripheral end of the battery cell 110, The battery cell 110 is wound along the outer peripheral ends 114 and 116 together with the plastic resin part 120 and the plastic resin part 120 which are hardened on the outer peripheral ends 114 and 116 of the battery cells 110, (Not shown).

The battery case 112 is formed of a pouch-shaped battery case 112 made of a flexible laminate sheet.

The battery case 112 has a housing recess portion 118 for receiving the electrode assembly and the electrolyte, a sealing outer periphery (not shown) extending outward from the housing recess portion 118, And a cover portion (not shown) that forms outer peripheral end portions 114 and 116 of the battery case 112 together with the periphery of the sealing and seals the accommodation recess portion 118.

The outer circumferential end portions 114 and 116 include a first outer circumferential end portion 116 to which the positive electrode terminal 111a and the negative electrode terminal 111b are led and a second outer circumferential end portion 116 excluding the outer circumferential end portions 114 and 116 except for the first outer circumferential end portion 116 And second peripheral ends 114, which are substantially parallel to one another.

The second outer circumferential end portions 114 are bent in the outer surface direction of the storage recess portion 118 and the first outer circumferential end portion 116 is connected to the inner circumferential surface of the storage recess portion 118 together with the cathode terminal 111a and the cathode terminal 111b. And is bent in the outer surface direction.

The protection circuit board 140 is electrically and physically coupled to the bent positive electrode terminal 111a and the negative electrode terminal 111b.

The reinforcing tape 150 is attached to the outer periphery of the first outer peripheral end portion 116 excluding the positive electrode terminal 111a and the negative electrode terminal 111b and the outer periphery of the storage recess portion 118 adjacent thereto.

The reinforcing tape 150 not only keeps the bent shape of the first peripheral end portion 116 but also prevents the plastic resin portion 120 from being bent between the first peripheral end portion 116 retained in shape and the accommodation recess portion 118. [ The pressure of the plastic resin part 120 is relieved from being applied to the inside of the accommodation recess part 118. [

In particular, the electrode tabs (not shown) and the electrode leads (not shown) are located inside the first peripheral end 116 and the adjacent recessed depressions 118, And the bonding sites of these can be broken.

Therefore, in the present invention, since the plastic resin part 120 is coated on the reinforcing tape 150 attached over the first outer peripheral end part 116 and the storage recessed part 118 and cured, the storage recessed part 118 The application of the external force to the inside can be remarkably mitigated.

The protective circuit board 140 is disposed substantially parallel to the first outer circumferential end portion 116 and the plastic resin portion 120 is attached to the protective circuit board 140 and the reinforcing tape 150 So that the molding of the secondary battery pack 100 is formed.

1, the plastic resin part 120 is wrapped around the outer periphery of the battery cell 110, and the open frame 130, which opens the upper and lower surfaces of the battery cell 110, Is applied along the outer periphery of the battery cell 110. [

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)

As a secondary battery pack,
A battery cell having a structure in which outer circumferential end portions of the battery case are sealed, an electrode assembly housed in the battery case and a structure in which an electrolyte is isolated from the outside;
A reinforcement tape attached to at least one of the outer circumferential ends of the battery cell to suppress outer peripheral deformation of the battery case;
A plastic resin part cured on outer peripheral ends of the battery cell to form a molding; And
An open frame surrounding the battery cells along outer peripheral ends together with the plastic resin part;
And the second battery pack. The battery pack according to claim 1,
A housing depression for accommodating the electrode assembly and the electrolyte;
Sealing outer peripheries extending outwardly from the receiving recess; And
A cover portion joined to the outer periphery of the sealing to form outer peripheral ends of the battery case together with the periphery of the sealing and to seal the accommodation recess portion;
Lt; / RTI &gt;
Wherein the outer circumferential end portions include first outer circumferential end portions to which the cathode terminal and the negative electrode terminal are led, and second outer circumferential end portions that are outer circumferential end portions except for the first outer circumferential end portion. 3. The method of claim 2,
The second outer peripheral ends are bent in the outer surface direction of the accommodation recess portion;
The first outer peripheral end portion is bent in the outer surface direction of the accommodation recess portion together with the cathode terminal and the cathode terminal;
Wherein the reinforcing tape is attached to the first outer circumferential end excluding the positive terminal and the negative terminal and the outer surface of the accommodating recess adjacent to the first outer circumferential end. The rechargeable battery pack according to claim 3, wherein the width of the reinforcing tape attached to the outer surface of the storage recessed portion is 80% to 100% of the recessed depth of the recessed depressed portion. The rechargeable battery pack according to claim 4, wherein the reinforcing tape is further attached to the outer surface of the battery case adjacent to the storage recess portion in a state of being attached to the outer surface of the storage recess portion. 5. The method of claim 4,
The reinforcing tape maintaining a folded shape of the first peripheral end;
Wherein a plastic resin portion molding is formed between the first outer peripheral end portion in which the shape is maintained and the storage recess portion. The secondary battery pack according to claim 5, wherein the reinforcing tape relieves the pressure of the plastic portion from being applied to the inside of the accommodation recess portion in a state before the plastic resin portion is cured. The secondary battery pack according to claim 2, further comprising a protection circuit board electrically and physically coupled to the positive and negative terminals. The secondary circuit protection circuit board according to claim 8, wherein the protection circuit board is located parallel to the first outer circumferential end, and forms a molding between the reinforcing tape adhered to the plastic circuit protection circuit board and the accommodation recess portion Battery pack. The secondary battery pack according to claim 8, further comprising an insulating label that integrally surrounds the battery cell, the plastic resin part, the protection circuit board, and the open frame. The secondary battery pack according to claim 1, wherein the reinforcing tape is a metal tape including at least one selected from stainless steel, nickel, aluminum, and copper. The secondary battery pack according to claim 1, wherein the plastic part is a thermoplastic hot-melt resin. The secondary battery pack according to claim 1, wherein the reinforcing tape has a thickness of 0.01 mm to 1 mm. 14. A method of manufacturing a secondary battery pack according to any one of claims 1 to 13,
A step of attaching a reinforcing tape to the first outer peripheral end portion and the storage recessed portion and bending the first outer peripheral end portion together with the positive electrode terminal and the negative electrode terminal in the direction of the outer surface of the adjacent storage recess portion;
Bending the second outer peripheral ends in the direction of the outer surface of the adjacent recessed depressed portion;
A process of mounting an open frame to a battery cell;
Injecting hot-melt resin between the first outer circumferential end portions bent and the outer circumferential surface of the storage recess portion to form a molding of the plastic resin portion; And
Hot-melt resin is injected between the second outer circumferential end portions and the outer peripheral surface of the accommodation recess portion and between the second outer circumferential end portions and the inner surface of the open frame so as to enclose the bent outer circumferential end portions, ;
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Wherein the reinforcing tape relieves pressure caused by the injection of the hot-melt resin to prevent breakage of the electrode assembly located inside the accommodation recess. 15. The method of claim 14,
Further comprising joining the protection circuit board to the positive electrode terminal and the negative electrode terminal by welding or soldering and bending the positive electrode terminal and the negative electrode terminal so that the protection circuit board is adjacent to the reinforcing tape attached to the accommodation recess portion;
Wherein a hot-melt resin is further injected between the protective circuit board and the reinforcing tape attached to the receiving recess, and then the molding is formed while being cured.

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