KR20160058418A - Battery Pack Having Elastic Rib for Fixing Battery Cell - Google Patents

Abstract

The present invention provides a battery pack with an elastic rib for fixing a battery cell, which comprises: one or more battery cells with a structure of which a cathode terminal and an anode terminal is protruded from at least one outer boundary; and a frame member which includes a base plate where battery cell is mounted on its top surface, and side walls of a structure protruding from the top surface of the base plate, and surrounding the outer boundary excluding an area where the cathode terminal and the anode terminal of the battery cell are protruded. At least one side wall among the side walls has an elastic rib bending and forming a certain angle towards the battery cell, protruding from a position where the base plate is connected with the side wall, at the inner side facing the battery cell.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery pack having an elastic rib for fixing a battery cell,

The present invention relates to a battery pack including an elastic rib for fixing a battery cell.

In recent years, the demand for environmentally friendly alternative energy sources has become an indispensable factor for the future, as the increase in the price of energy sources due to depletion of fossil fuels and the interest in environmental pollution are amplified. Various researches on power generation technologies such as nuclear power, solar power, wind power, and tidal power have been continuing, and electric power storage devices for more efficient use of such generated energy have also been attracting much attention.

Particularly, as technology development and demand for mobile devices increase, the demand for batteries as energy sources is rapidly increasing. Recently, the use of secondary batteries as a power source for electric vehicles (EV) and hybrid electric vehicles (HEV) In addition, the use area has been expanded for use as a power auxiliary power source through a grid, and accordingly, a lot of researches on a battery that can meet various demands have been conducted.

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

Such a secondary battery may be used in the form of a battery pack in a state where a plurality of battery cells are mounted on a frame member and connected in series or in parallel so as to exhibit a desired capacity characteristic in a device to which the invention is applied.

1 is a schematic view schematically showing a structure in which a battery cell is mounted on a frame member constituting a conventional battery pack.

Referring to FIG. 1, a battery pack 100 includes three frames 110, 120, and 130 mounted on one frame 140.

The battery cell 110 protrudes from the outer periphery of one side of the same side of the positive electrode terminal 112 and the negative electrode terminal 111 and is mounted on the upper surface of the base plate 141 of the frame member 140.

On the upper surface of the base plate 141, a sidewall 142 having a structure that entirely surrounds the outer periphery of the battery cells 110, 120, and 130 and is positioned between the battery cells 110, 120, and 130 protrudes upward A space in which the respective battery cells 110, 120, and 130 can be mounted is separately partitioned.

The battery cells 110, 120 and 130 are mounted on the respective spaces defined by the side walls 142 and the battery cells 110 and the frame members 140 which are in contact with the battery cells 110 A double-sided tape 150 is provided between the base plate 141 and the base plate 141 so as to prevent damage or breakage due to the flow of the battery cell 110.

However, the battery pack 100 requires an additional process for adding the double-sided tape 150, which increases the overall time and cost required for manufacturing the battery pack 150.

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.

The inventors of the present application have conducted intensive research and various experiments. As a result, the inventors of the present invention have found that the elastic ribs (ribs), which are bent and protruded at predetermined angles toward the battery cells, It is possible to stably fix and support the battery cell by the elasticity of the elastic rib and to improve the structural stability of the battery pack, It is possible to save the time and cost required for manufacturing the battery pack and confirm that the battery cells of various sizes can be easily mounted and fixed in one frame member, It came to the following.

According to an aspect of the present invention, there is provided a battery pack comprising:

At least one battery cell having a structure in which a positive electrode terminal and a negative electrode terminal protrude from at least one outer periphery; And

A frame member including a base plate on which a battery cell is mounted on an upper surface, and sidewalls protruding upward from an upper surface of the base plate, the sidewalls being configured to surround the remaining periphery except a portion where a positive terminal and a negative terminal of the battery cell protrude;

And,

At least one side wall of the side walls has a structure in which an elastic rib is bent and protruded at a predetermined angle in a direction toward the battery cell from a portion where the base plate and the side wall are in contact with each other, .

Therefore, the battery cell can be stably fixed and supported by the elasticity of the elastic ribs without the addition of a separate adhesive member, so that the structural stability of the battery pack can be improved, and the step of adding the adhesive member can be omitted Therefore, the time and cost required for manufacturing the battery pack can be saved, and the battery cells of various sizes can be easily mounted and fixed in one frame member.

In one specific example, the battery cell is not limited as long as the battery cell can be stably fixed and supported by the elastic ribs in a state where the battery cell is mounted on the frame member. Specifically, the battery cell is a laminate including a resin layer and a metal layer And a sheet-like structure in which the electrode assembly is sealed in the sheet.

The positive terminal and the negative terminal may protrude from the same outer periphery of the battery cell, but the present invention is not limited thereto. Specifically, the positive terminal and the negative terminal may protrude from the outer periphery opposite to each other Of course.

In one specific example, the angle at which the elastic rib is bent and protruded from the portion where the base plate and the side wall are in contact with the battery cell may be 10 to 80 degrees with respect to the base plate, and more specifically, may be 30 to 50 degrees have.

If the elastic rib is bent and protruded at an excessively large angle with respect to the base plate beyond the above range, the elastic rib can not stably face and support the battery cell, and the elastic rib can be bent and protruded at an excessively small angle The elastic rib may be deformed or damaged due to an excessive pressure applied to the elastic rib by the battery cell.

The sidewall of the frame member in which the elastic rib is bent and protruded may be a sidewall of a portion corresponding to the outer periphery of one side in contact with the outer periphery of the battery cell protruded from the positive electrode terminal and the negative electrode terminal.

In other words, the elastic ribs may be formed on the sidewall of a portion corresponding to the outer periphery of one of the outer peripheries except for the outer peripheries of the protruded battery cells, specifically, the positive terminal and the negative terminal, The negative electrode terminal protrudes from a side wall of a portion corresponding to the outer periphery of one side in contact with the outer periphery of the protruding battery cell.

Therefore, it is possible to fix and support the battery cell more easily without causing interference with the positive and negative terminals of the battery cell.

Meanwhile, the elastic ribs may have a linear structure bent in a vertical cross section.

If the elastic rib is not bent in a vertical section, the elastic rib may protrude higher than the side wall of the frame member to increase the overall volume of the battery pack. When the elastic rib is not linear, For example, in the case of a circular or polygonal shape in the vertical section, it may not be possible to exhibit a desired degree of elasticity.

At this time, the elastic rib has a curved linear structure of a 'V' shape on a vertical cross section, and a lower end portion adjacent to a portion where the base plate and the side wall are in contact with each other and an upper end portion facing the base plate, And surrounds a part of the upper surface.

In other words, the elastic ribs are formed in a bent linear structure of a 'V' shape on a vertical cross section, and a lower end portion and an upper end portion, which are separated from each other with reference to the bent portion, respectively surround one outer periphery and a part of the upper surface of the battery cell So that the battery cell can be stably fixed and supported from one side wall formed with the elastic rib to the opposite side wall by the lower end portion so that the battery cell can be stably fixed and supported by the elastic rib It is possible to prevent the frame member from being separated or separated from the base plate due to elasticity.

In addition, the lower end of the elastic rib may be deformed into a curved shape dented in the direction of the battery cell by elasticity in a state of facing the outer periphery of one side of the battery cell to apply pressure.

That is, since the lower end of the elastic rib is deformed into a curved shape recessed toward the battery cell in a state of facing the outer periphery of one side of the battery cell, So that the battery cell can be fixed and supported in close contact with the sidewall facing the side wall protruding from the elastic rib.

In addition, the length of the lower end of the elastic rib may be 100% to 200% of the height at which the side wall protrudes, and more specifically, it may be 130% to 160% % ≪ / RTI > to 150%.

If the length of the lower end of the elastic rib is too small beyond the above range, the battery cell can not be brought into contact with the outer periphery of one side of the battery cell according to the size of the battery cell, The lower end portion of the elastic rib may protrude excessively higher than the side wall to increase the overall size of the battery pack or the pressure applied to the lower end portion of the elastic rib may become excessively large, Or damage.

The elastic rib may have a total length of about 120% to about 250% of the height at which the side wall of the frame member protrudes, and more specifically, about 150% to about 200%.

Here, the total length of the elastic rib means the entire length of the lower end portion adjacent to the portion where the base plate and the side wall are in contact with each other, and the upper end portion thereof facing the base plate.

If the length of the elastic rib is out of the range and is excessively low compared with the protruded height of the battery cell, the elastic rib may be in contact with the outer periphery of one side of the battery cell, On the other hand, when the length of the elastic rib is too large as compared with the height at which the side wall protrudes, there is a restriction on the space where the battery cell is mounted.

In one specific example, the elastic rib may be a structure formed integrally with the frame member.

Therefore, it is possible to easily form the elastic ribs in the process of manufacturing the frame member, without connecting the elastic ribs to each other, and in comparison with the case where the separate elastic ribs are connected to the side wall of the frame member, It is possible to effectively prevent damage or breakage due to the pressure exerted on the elastic rib by the portion.

In addition, the material of the frame member can be easily formed integrally with the elastic rib, and if the elastic rib formed integrally with the elastic rib exerts a predetermined elasticity so that a desired pressure can be applied to the battery cell, The frame member may be made of a plastic material having a predetermined elasticity.

The thickness of the elastic rib may be about 30% to about 80% of the thickness of the sidewall of the frame. In detail, the thickness of the elastic rib may be about 50% to about 60% of the thickness of the side wall of the frame.

If the thickness of the elastic rib is excessively small or too large relative to the thickness of the side wall of the frame member beyond the above range, the lower end of the elastic rib may be damaged or broken , The deformed elastic ribs can not exhibit the desired degree of elasticity.

Therefore, the thickness of the elastic rib can be adjusted to an appropriate size within a range of 30% to 80% with respect to the thickness of the side wall that maintains the predetermined shape.

Meanwhile, 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 < 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 an advantage in that the increase in cell thickness due to swelling during formation can be suppressed as compared with the case where a conventional separator is used, 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 and the like 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 device including the battery pack as a power source, wherein the device is a mobile phone, a tablet computer, a notebook computer, a power tool, a wearable electronic apparatus, an electric vehicle, a hybrid electric vehicle, a plug- , And a power storage device.

Since the devices are well known in the art, a detailed description thereof will be omitted herein.

As described above, the battery pack according to the present invention is configured so as to include an elastic rib that bends and protrudes at a predetermined angle in the direction of the battery cell from a portion where the base plate and the side wall are in contact with each other, It is possible to stably fix and support the battery cell by the elasticity of the elastic rib without the addition of the adhesive member of the battery pack to improve the structural stability of the battery pack and to omit the step of attaching the adhesive member, The time and cost required for manufacturing the pack can be saved, and the battery cells of various sizes can be easily mounted and fixed in one frame member.

1 is a schematic view showing a structure in which a battery cell is mounted on a frame member constituting a conventional battery pack;
2 is a schematic view illustrating a structure in which a battery cell is mounted on a frame member of a battery pack according to an embodiment of the present invention;
3 is a schematic view illustrating a structure in which battery cells of different sizes are mounted on a frame member of a battery pack according to another embodiment of the present invention.

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

FIG. 2 is a schematic view illustrating a structure in which a battery cell is mounted on a frame member of a battery pack according to an embodiment of the present invention.

2, three battery cells 210, 220 and 230 are mounted on one frame 240 of the battery pack 200.

The battery cell 210 protrudes from the outer periphery of the same one side of the positive electrode terminal 212 and the negative electrode terminal 211 and is mounted on the upper surface of the base plate 241 of the frame member 240.

On the upper surface of the base plate 241, a sidewall 242 having a structure that entirely surrounds the outer periphery of the battery cells 210, 220 and 230 and is located between the battery cells 210, 220 and 230 protrudes upward Thus, a space in which the respective battery cells 210, 220 and 230 can be mounted is separately partitioned.

Two elastic ribs 250 and 260 are bent and protruded in the direction of the battery cell 210 in the side wall 242 adjacent to the outer periphery of one side of the battery cell 210.

The elastic rib 250 has a V-shaped bent linear structure with a vertical cross section. The lower end 252 of the elastic rib 250 is in contact with the outer periphery of one side of the battery cell 210 on the basis of the bent portion, The lower end portion 252 and the upper end portion 251 of the battery cell 210 surround the outer periphery and a part of the upper surface of the battery cell 210, respectively.

The lower end portion 252 of the elastic rib 250 is deformed into a curved shape recessed toward the battery cell 210 due to elasticity while facing the outer periphery of one side of the battery cell 210. [

Accordingly, the elastic rib 250 can stably fix and support the battery cell 210 by making the battery cell 210 close to the other side opposite to the one side by the elasticity of the curved lower end portion 252.

3 is a schematic view illustrating a structure in which battery cells of different sizes are mounted on a frame member of a battery pack according to another embodiment of the present invention.

3, battery cells 311 and 321 of different sizes are mounted on the upper surfaces of the base plates 312 and 322, respectively, in the battery packs 310 and 320, And 321 are closely contacted to the other side walls 314 and 324 by elastic ribs 315 and 325 protruding from the side walls 313 and 323 on one side.

Each of the elastic ribs 315 and 325 has a curved linear structure of a V shape on a vertical cross section and the lower ends 315b and 325b of the elastic ribs 315 and 325 are connected to the respective battery cells 311 and 321, The upper ends 315a and 325a opposed to the battery cells 311 and 325 are deformed into a curved shape recessed toward the respective battery cells 311 and 321 by elasticity in a state of being in contact with the corresponding outer periphery of the battery cells 311 and 325, 311, and 321, respectively.

In the case of the battery pack 310 in which the battery cell 311 having a relatively small size is mounted, the elastic rib 315 is deformed in a curved shape by the pressure at which the lower end portion 315b is restored by elasticity, Is brought into close contact with the other side wall 314.

On the other hand, in the case of the battery pack 320 in which the battery cell 321 having a relatively large size is mounted, the elastic rib 325 which is in contact with the outer periphery of one side of the battery cell 321 faces the relatively small battery cell The shape of the lower end portion 325b is largely deformed relative to the elastic ribs 315 of the battery pack 310 in which the elastic ribs 321 and 311 are mounted, .

Therefore, in the battery pack according to the present invention, the elastic rib is bent and protruded at a predetermined angle in the direction of the battery cell from a portion where the elastic plate is adjacent to the outer periphery of one side of the battery cell and the base plate, It is possible to stably fix and support the battery cell by the elasticity of the elastic rib, thereby improving the structural stability of the battery pack and omitting the step of adding the adhesive member. Therefore, The cost can be saved, and the battery cells of various sizes can be easily mounted and fixed within one frame member.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (17)

At least one battery cell having a structure in which a positive electrode terminal and a negative electrode terminal protrude from at least one outer periphery; And
A frame member including a base plate on which a battery cell is mounted on an upper surface, and sidewalls protruding upward from an upper surface of the base plate, the sidewalls being configured to surround the remaining periphery except a portion where the positive and negative terminals of the battery cell protrude;
And,
At least one side wall of the side walls has an elastic rib protruding from a portion where the base plate and the side wall are in contact with each other at a predetermined angle in a direction toward the battery cell. Battery pack. The battery pack according to claim 1, wherein the battery cell comprises a plate-like structure in which an electrode assembly is sealed in a laminate sheet including a resin layer and a metal layer. The battery pack according to claim 1, wherein the positive electrode terminal and the negative electrode terminal protrude from the same outer periphery of the battery cell. The battery pack according to claim 1, wherein the elastic rib has a linear structure bent in a vertical section. The battery pack according to claim 1, wherein an angle at which the elastic rib is bent and protruded from a portion where the elastic plate is in contact with the side wall toward the battery cell is 10 to 80 degrees with respect to the base plate. The battery pack according to claim 1, wherein the sidewall of the frame member in which the elastic rib is bent and protruded is a sidewall of a portion corresponding to the outer periphery of one side of the battery cell protruding from the positive electrode terminal and the negative electrode terminal. The battery module according to claim 1, wherein the resilient ribs have a curved linear structure of a 'V' shape on a vertical cross section, and a lower end portion adjacent to a portion where the base plate and the side wall are in contact with each other, Wherein the battery pack has a structure that surrounds one outer periphery and a part of the upper surface. The battery pack according to claim 7, wherein a lower end of the elastic rib is deformed into a curved shape that is bent in the direction of the battery cell by elasticity to apply pressure when facing the outer periphery of one side of the battery cell. The battery pack according to claim 7, wherein a length of the lower end of the elastic rib is 100% to 200% of a height at which the side wall protrudes. [8] The battery pack of claim 7, wherein the elastic rib has a total length of 120% to 250% of a height at which the side wall of the frame member protrudes. The battery pack according to claim 1, wherein the elastic rib is formed integrally with the frame member. The battery pack according to claim 1, wherein the frame member is made of a plastic material. The battery pack according to claim 1, wherein the thickness of the elastic rib is 30% to 80% of the thickness of the side wall of the frame. The battery pack according to claim 1, wherein at least one elastic rib protrudes toward the battery cell from a portion where the base plate and the side wall are in contact with each other on the one sidewall facing the battery cell. The battery pack according to claim 1, wherein the battery cell is a lithium secondary battery. A device comprising the battery pack according to claim 1 as a power source. 17. The device of claim 16, wherein the device is selected from the group consisting of a cell phone, a tablet computer, a notebook computer, a power tool, a wearable electronic appliance, an electric vehicle, a hybrid electric vehicle, a plug- . ≪ / RTI >

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