KR20170084500A - Battery Module Having Structure for Dispersing Load in Z-Axis Direction - Google Patents

Abstract

The present invention provides a battery pack comprising: a plurality of battery cells arranged in a first direction perpendicular to a ground; A plurality of cartridges having battery cell receiving portions in which battery cells are mounted in units of two, and which are stacked in a first direction in a state in which the battery cells are mounted; End plates respectively mounted on outer surfaces of the outermost cartridges of the cartridges; And a bus bar assembly mounted on one side of the battery module in which the electrode terminals of the battery cells are located, wherein the bus bar assembly supports and distributes the load in the first direction by the bus bar assembly, A plurality of first coupling protrusions are formed on the outer circumferential surfaces of the outer circumferential surfaces of the bus bar assembly contacting the cartridges, and a plurality of first coupling protrusions are formed on the upper or lower surface of each of the cartridges, And a plurality of grooves are formed in the battery module.

Description

[0001] The present invention relates to a battery module having a Z-axis direction load distribution structure,

The present invention relates to a battery module having a structure for dispersing a Z-axis direction load.

2. Description of the Related Art [0002] Recently, as technology development and demand for mobile devices have increased, the demand for secondary batteries capable of charging and discharging as energy sources has been rapidly increasing, and a lot of research has been conducted on secondary batteries that can meet various demands. In addition, the secondary battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (HEV), and the like, which are proposed as solutions for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels (Plug-In HEV) and the like.

Accordingly, an electric vehicle (EV) that can be operated only by a battery, and a hybrid electric vehicle (HEV) that uses a battery and an existing engine have been developed, and some of them have been commercialized. BACKGROUND ART [0002] Nickel metal hydride (Ni-MH) secondary batteries are mainly used as secondary batteries as power sources for EV, HEV, etc. Recently, researches using lithium secondary batteries having high energy density, high discharge voltage and output stability have been actively conducted And is in the process of commercialization.

When such a secondary battery is used as a power source for an automobile, the secondary battery is used in the form of a battery pack including a plurality of battery modules or a battery module assembly.

However, such a battery pack for a vehicle is located at the lowermost end of the battery module due to variations in the thickness of the battery cells and variations in the thickness of the cartridge in which the battery cells are mounted during the process of stacking the battery cells in the process of assembling the battery modules constituting the battery pack A large load is concentrated on the battery cell.

In addition, since the vehicle battery pack is generally mounted in an internal space such as a trunk, a load is concentrated in a specific direction on the battery module or the battery module assembly depending on vibrations and road surface impacts generated during traveling of the vehicle, And thus the stability of the electrical connection of the battery pack is deteriorated.

Therefore, there is a high need for a technique capable of fundamentally solving such problems.

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

More specifically, it is an object of the present invention to provide a battery module in which the load applied to the battery cells by distributing the load in a specific direction between battery cells constituting the battery module is made uniform, The present invention also provides a battery module capable of preventing the battery cells from being damaged by an external force and ensuring safety even in an environment.

According to an aspect of the present invention,

A plurality of battery cells arranged in a first direction perpendicular to the paper;

A plurality of cartridges having battery cell receiving portions in which battery cells are mounted in units of two, and which are stacked in a first direction in a state in which the battery cells are mounted;

End plates respectively mounted on outer surfaces of the outermost cartridges of the cartridges; And

A bus bar assembly mounted on one side of a battery module where electrode terminals of the battery cells are located;

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A plurality of first coupling protrusions are formed on outer circumferential surfaces of the outer circumferential surfaces of the bus bar assembly that contact the cartridges so that loads in the first direction of the battery cells can be supported and dispersed by the bus bar assembly, The first coupling grooves into which the first coupling protrusions are inserted may be formed in the end portions of the upper surface or the lower surface of each of the cartridges.

The first direction may mean the Z-axis direction in the XYZ coordinate system.

According to the above structure, in the battery module according to the present invention, a plurality of first coupling protrusions are formed on the outer circumferential surfaces of the outer circumferential surfaces of the bus bar assembly that contact the cartridges, The first coupling grooves into which the first coupling protrusions are inserted are formed in the first and second coupling grooves so that the load in the first direction of the battery cells is supported and dispersed by the bus bar assembly and the cartridges, It is possible to prevent the battery cells from being damaged by load and external force even in an operating environment in which vibration and an external shock are applied, thereby ensuring safety.

In one embodiment of the present invention, the battery cells may be pouch-shaped battery cells.

The pouch-shaped battery cell may have a structure in which an electrode assembly having a separator structure sandwiched between an anode, a cathode, and an anode and a cathode is built in and sealed together with an electrolyte in a battery case made of a laminate sheet.

The electrode assembly may have a folding structure, a stacking structure, or a stacking / folding structure, or a lamination / stacking structure.

The electrode structures of the folding type, the stacking type, the stacking / folding type, and the lamination / stacking type will be described in detail as follows.

First, a unit cell of a folding structure can be produced by coating a mixture containing an electrode active material on each metal current collector, placing the separator sheet between a cathode and an anode in the form of a sheet dried and pressed, and winding .

The unit cells of the stacked structure are formed by coating each electrode collector with an electrode mixture, drying and pressing the separator, and separating the positive and negative plates with a predetermined size corresponding to the positive and negative plates, And then laminating them.

The unit cell of the stack / folding type structure includes two or more unit cells in which the anode and the cathode face each other and in which two or more electrode plates are stacked, and the unit cells are wound with at least one separating film in a non- Or by bending the separation film to a size of the unit cell and interposing it between the unit cells.

In some cases, the positive electrode and the negative electrode face each other, and one or more single electrode plates may be further included between any unit cells and / or an outer surface of the outermost unicell.

The unit cell may be an S-type unit cell in which the outermost electrode plates on both sides have the same electrode, and a D-type unit cell in which the outermost electrode plates on opposite sides have opposite electrodes.

The S type unit cell may be an SA type unit cell in which the outermost electrode plates on both sides are the anode, and an SA type unit cell in which the outermost electrode plates on both sides are the cathodes.

The unit cells of the lamination / stacked structure are obtained by coating each metal current collector with an electrode mixture, drying, pressing and cutting to a predetermined size, sequentially forming a negative electrode from the bottom, a separator, And a separator is laminated thereon.

The laminate sheet may have a structure including a resin outer layer having excellent durability, a barrier metal layer, and a heat-meltable resin sealant layer.

Since the resin outer layer must have excellent resistance from the external environment, it is necessary to have a tensile strength and weather resistance higher than a predetermined level. In this respect, polyethylene terephthalate (PET) and stretched nylon film can be preferably used as the polymer resin of the outer resin layer.

The barrier metal layer may preferably be made of aluminum so as to exhibit a function of improving the strength of the battery case, in addition to a function of preventing foreign matter such as gas or moisture from leaking or leaking.

The resin sealant layer may preferably be a polyolefin resin having low heat absorbability (thermal adhesiveness), low hygroscopicity to suppress penetration of an electrolyte solution, and not being swollen or eroded by an electrolytic solution, Preferably, lead-free polypropylene (CPP) can be used.

In one embodiment of the present invention, depressions may be formed on the upper surface or the lower surface of the cartridge at the end portions corresponding to the first mating protrusions, respectively, and a pair of adjacent cartridges may be formed in one cartridge The first engaging groove may be formed by a combination of the first indentation formed in the cartridge and the second indentation formed in another cartridge.

The bus bar assembly may be structured to be mounted on one side of the stacked cartridges by being introduced in a second direction perpendicular to the first direction. The second direction may mean a Y-axis direction in the XYZ coordinate system, and may mean a direction in which the electrode terminals of the battery cells protrude.

In one specific example, the first coupling protrusion may have a rectangular plate-like shape in the second direction.

Also, the first coupling groove may have a shape corresponding to the first coupling protrusion in the second direction, so that the bus bar assembly is mounted on the upper or lower end of the battery cells The first coupling protrusion is inserted and fastened to the first coupling groove, so that the load in the Z axis direction applied to the battery cells can be dispersed by the cartridges and the bus bar assembly.

In another specific example, on one surface of the first engaging projection in the third direction, second engageable protrusions fastened to the cartridges are provided to prevent the flow of battery cells and cartridges in the second direction And second coupling grooves may be formed in corresponding portions of the first coupling grooves corresponding to the second coupling protrusions.

The third direction may mean a direction perpendicular to the first direction and the second direction, and may mean an X-axis direction in the XYZ coordinate system. The direction perpendicular to the direction in which the electrode terminals of the battery cell protrude It can mean.

The second coupling protrusion may have a hook structure. Specifically, the second coupling protrusions may have a triangular prism shape in the first direction, and the sectional area may gradually decrease from the bus bar assembly direction to the electrode terminal direction in the second direction. According to this structure, when the bus bar assembly is mounted on the upper or lower end of the battery cells, the second coupling protrusion is inserted from a portion having a small cross-sectional area and is easy to mount, A portion having a large cross-sectional area of the second mating protrusion can be brought into close contact with the second mating grooves in a state where the second mating protrusion is completely inserted into the second mating grooves, so that the flow in the second direction can be suppressed.

In one embodiment of the present invention, both side ends of the cartridges may protrude in a second direction so as to cover both sides of the bus bar assembly.

The positive electrode terminal and the negative electrode terminal of the battery cells may be formed on one side in the second direction.

In one embodiment of the present invention, the battery module includes:

Cooling members respectively mounted between the two units of the battery cells;

Insulation members respectively mounted between the outermost battery cells and the end plates; And

Cushioning members respectively mounted between the insulating members and the battery cells;

As shown in FIG.

The battery cell may be a lithium secondary battery, specifically, a lithium ion battery or a lithium ion polymer battery.

Generally, a lithium secondary battery is composed of a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte containing a lithium salt.

The positive electrode is prepared, for example, by coating a mixture of a positive electrode active material, a conductive material and a binder on a positive electrode current collector, and then drying the mixture. Optionally, a filler may be further added to the mixture.

The cathode active material may be a layered compound such as lithium cobalt oxide (LiCoO ₂ ), lithium nickel oxide (LiNiO ₂ ), or a compound substituted with one or more transition metals; Lithium manganese oxides such as Li _{1 + x} Mn _{2 -x} O ₄ (where x is 0 to 0.33), LiMnO ₃ , LiMn ₂ O ₃ , LiMnO ₂ and the like; Lithium copper oxide (Li ₂ CuO ₂ ); Vanadium oxides such as LiV ₃ O ₈ , LiFe ₃ O ₄ , V ₂ O ₅ and Cu ₂ V ₂ O ₇ ; A Ni-site type lithium nickel oxide expressed by the formula LiNi _1-x M _x O ₂ (where M = Co, Mn, Al, Cu, Fe, Mg, B or Ga and x = 0.01 to 0.3); Formula _{LiMn 2-x M x O 2} ( where, M = Co, Ni, Fe , Cr, and Zn, or Ta, x = 0.01 ~ 0.1 Im) or Li ₂ Mn ₃ MO ₈ (where, M = Fe, Co, Ni, Cu, or Zn); LiMn ₂ O _{4 in} which a part of Li in the formula is substituted with an alkaline earth metal ion; Disulfide compounds; Fe ₂ (MoO ₄ ) ₃ , and the like. However, the present invention is not limited to these.

The conductive material is usually added in an amount of 1 to 30% by weight based on the total weight of the mixture including the cathode active material. Such a conductive material is not particularly limited as long as it has electrical conductivity without causing chemical changes in the battery, for example, graphite such as natural graphite or artificial graphite; Carbon black such as carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, and summer black; Conductive fibers such as carbon fiber and metal fiber; Metal powders such as carbon fluoride, aluminum, and nickel powder; Conductive whiskey such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives and the like can be used.

The binder is a component which assists in bonding of the active material and the conductive material and bonding to the current collector, and is usually added in an amount of 1 to 30% by weight based on the total weight of the mixture containing the cathode active material. Examples of such binders include polyvinylidene fluoride, polyvinyl alcohol, carboxymethylcellulose (CMC), starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, tetrafluoroethylene, polyethylene , Polypropylene, ethylene-propylene-diene terpolymer (EPDM), sulfonated EPDM, styrene butylene rubber, fluorine rubber, various copolymers and the like.

The filler is optionally used as a component for suppressing the expansion of the anode, and is not particularly limited as long as it is a fibrous material without causing a chemical change in the battery. Examples of the filler include olefin polymers such as polyethylene and polypropylene; Fibrous materials such as glass fibers and carbon fibers are used.

The negative electrode is manufactured by applying and drying a negative electrode active material on a negative electrode collector, and if necessary, the above-described components may be selectively included.

Examples of the negative electrode active material include carbon such as non-graphitized carbon and graphite carbon; _{Li x Fe 2 O 3 (0≤x≤1} ), Li x WO 2 (0≤x≤1), Sn x Me 1-x Me 'y O z (Me: Mn, Fe, Pb, Ge; Me' : Metal complex oxides such as Al, B, P, Si, Group 1, Group 2, Group 3 elements of the periodic table, Halogen, 0 < x &lt; Lithium metal; Lithium alloy; Silicon-based alloys; Tin alloy; _{SnO, SnO 2, PbO, PbO} 2, Pb 2 O 3, Pb 3 O 4, Sb 2 O 3, Sb 2 O 4, Sb 2 O 5, GeO, GeO 2, Bi 2 O 3, Bi 2 O 4, and Bi ₂ O ₅ ; Conductive polymers such as polyacetylene; Li-Co-Ni-based materials and the like can be used.

The separation membrane 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 separator is generally 0.01 to 10 mu m and the thickness is generally 5 to 300 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.

The non-aqueous electrolyte solution containing a lithium salt is composed of a polar organic electrolyte and a lithium salt. As the electrolytic solution, a non-aqueous liquid electrolytic solution, an organic solid electrolyte, an inorganic solid electrolyte and the like are used.

Examples of the nonaqueous liquid electrolytic solution include N-methyl-2-pyrrolidinone, propylene carbonate, ethylene carbonate, butylene carbonate, dimethyl carbonate, diethyl carbonate, gamma -Butyrolactone, 1,2-dimethoxyethane, tetrahydroxyfuran, 2-methyltetrahydrofuran, dimethylsulfoxide, 1,3-dioxolane, formamide, dimethylformamide, dioxolane , Acetonitrile, nitromethane, methyl formate, methyl acetate, triester phosphate, trimethoxymethane, dioxolane derivatives, sulfolane, methylsulfolane, 1,3-dimethyl-2-imidazolidinone, propylene carbonate Nonionic organic solvents such as tetrahydrofuran derivatives, ethers, methyl pyrophosphate, ethyl propionate and the like can be used.

Examples of the organic solid electrolyte include a polymer electrolyte such as a polyethylene derivative, a polyethylene oxide derivative, a polypropylene oxide derivative, a phosphate ester polymer, an agitation lysine, a polyester sulfide, a polyvinyl alcohol, a polyvinylidene fluoride, Polymers containing ionic dissociation groups, and the like can be used.

Examples of the inorganic solid electrolyte include Li ₃ N, LiI, Li ₅ NI ₂ , Li ₃ N-LiI-LiOH, LiSiO ₄ , LiSiO ₄ -LiI-LiOH, Li ₂ SiS ₃ , Li ₄ SiO ₄ , Nitrides, halides and sulfates of Li such as Li ₄ SiO ₄ -LiI-LiOH and Li ₃ PO ₄ -Li ₂ S-SiS ₂ can be used.

The lithium salt is a material that is readily soluble in the non-aqueous electrolyte, for example, LiCl, LiBr, LiI, LiClO 4, LiBF 4, LiB 10 Cl 10, LiPF 6, LiCF 3 SO 3, LiCF 3 CO 2, LiAsF _{6, LiSbF 6, LiAlCl 4,} CH 3 SO 3 Li, CF 3 SO 3 Li, (CF 3 SO 2) 2 NLi, chloroborane lithium, lower aliphatic carboxylic acid lithium, lithium tetraphenyl borate and imide have.

For the purpose of improving the charge-discharge characteristics and the flame retardancy, the non-aqueous liquid electrolyte may contain, for example, pyridine, triethylphosphite, triethanolamine, cyclic ether, ethylenediamine, glyme, N, N-substituted imidazolidine, ethylene glycol dialkyl ether, ammonium salt, pyrrole, 2-methoxyethanol, aluminum trichloride, etc. are added It is possible. In some cases, a halogen-containing solvent such as carbon tetrachloride or ethylene trifluoride may be further added to impart nonflammability, or a carbon dioxide gas may be further added to improve high-temperature storage characteristics.

The present invention also provides a battery pack having a structure including the battery module.

The present invention also provides a device including the battery pack as a power source.

The device may be selected from an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.

The structure of these devices and their fabrication methods are well known in the art, and a detailed description thereof will be omitted herein.

As described above, in the battery module according to the present invention, a plurality of first coupling protrusions are formed on the outer circumferential surfaces of the outer circumferential surfaces of the bus bar assembly in contact with the cartridges, and the end portions The first coupling grooves into which the first coupling protrusions are inserted are formed so that the load in the first direction of the battery cells is supported and dispersed by the bus bar assembly and the cartridges, And it is possible to prevent the battery cells from being damaged by the load and the external force even in an operating environment in which an external impact is applied, thereby securing safety.

1 is a perspective view of a battery module according to one embodiment of the present invention;
Figure 2 is an exploded view of the battery module of Figure 1;
3 is a perspective view of a battery module having a structure in which the battery cells of FIG. 1 are stacked in the Z-axis direction;
Fig. 4 is a cross-sectional view of the battery module of Fig. 1 in the Y-axis direction "AA &quot;;
5 is an enlarged view of a portion 'D' in FIG. 4;
6 is a cross-sectional view of the battery module of Fig. 1 in the X-axis direction "BB &quot;;
7 is a cross-sectional view of "CC" in the Z-axis direction of the battery module of Fig. 1;

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited by the scope of the present invention.

FIG. 1 is a perspective view of a battery module according to an embodiment of the present invention, and FIG. 2 is an exploded view of the battery module of FIG.

Referring to FIGS. 1 and 2, the battery module 110 includes a battery cell 10, a cartridge 20, a cooling member 30, an end plate 60, and a bus bar assembly 130.

The battery cell 10 is a pouch-shaped battery cell having a structure in which an electrode laminate is embedded in a case of a laminate sheet including a metal layer and a resin layer and then an outer circumferential surface is sealed. The battery cell 10 includes a positive electrode terminal 11 and a negative electrode terminal 12, Are formed on the same line.

A battery cell compartment 22 for mounting the battery cells 10 is formed at the center of the cartridge 20 and the two battery cells 10 are provided with a cooling member 30 interposed therebetween And is mounted in both the front and rear directions of the battery cell compartment 21. [

The plurality of cartridges 20 on which the battery cells 10 and the cooling members 30 are mounted are arranged in the direction in which the side surfaces of the battery cells 10 are in contact and the battery cells 10 are arranged in the outermost positions The end plate 60 is mounted.

Fasteners 21 and 61 are formed at four corners of each of the cartridge 20 and the end plate 60. The members constituting the battery module 110 arranged as described above are fastened by fasteners 21 and 61, And fastening bolts 70 are inserted into the fastening bolts 70 so that these members are fastened and fixed.

A bus bar assembly 130 is mounted on the upper end of the battery cells 10 connected in this manner and the bus bar assembly 130 connects the battery cells 10 in series and / And functions to shut off the electric current when the battery module 110 malfunctions.

Fig. 3 is a perspective view of a battery module having a structure in which the battery cells of Fig. 1 are stacked in the Z-axis direction, and Fig. 4 is a schematic view of the battery module of Fig. And FIG. 5 schematically shows an enlarged view of a portion 'D' in FIG. 4. FIG. 6 schematically shows a cross-sectional view of a battery module in FIG. And Fig. 7 schematically shows a cross-sectional view of "CC" in the Z-axis direction of the battery module of Fig.

Referring to FIGS. 3 to 7 together with FIGS. 1 and 2, a bus bar assembly 130 (not shown) is mounted on the bus bar assembly 130 so as to support and distribute the load in the Z axis direction of the battery cells 10 by the bus bar assembly 130. [ A plurality of first coupling protrusions 131 are formed on the outer circumferential surfaces contacting the cartridges 20 among the outer circumferential surfaces of the cartridges 20 and the first coupling protrusions 131 The first coupling grooves 21 are formed.

The upper surface of the cartridge 20 is provided with a depressed portion at an end portion corresponding to the first mating protrusions 131 and formed in one cartridge 20a by a pair of adjacent cartridges 20a and 20b The first engaging recess 21 is formed by the combination of the first recessed portion 21a formed in the cartridge 20a and the second recessed portion 21b formed in the other cartridge 20b.

The bus bar assembly 130 is mounted on the upper surface of the stacked cartridges 20 in the Y-axis direction perpendicular to the Z-axis direction.

The first coupling protrusion 131 has a rectangular plate-like shape in the Y-axis direction, and the first coupling groove 21 has a shape in the Y-axis direction corresponding to the first coupling protrusion 131 .

The first coupling protrusion 131 is inserted and fastened to the first coupling groove 21 in a state where the bus bar assembly 130 is mounted on the upper surface of the cartridges 20, ) Can be dispersed by the cartridges 20 and the bus bar assembly 130. [0051] As shown in FIG.

The first engaging protrusion 131 is provided on one side in the X-axis direction with a first engageable portion 14a of the cartridge 20, And second concave grooves 22 are formed at corresponding portions of the first concave grooves 21 corresponding to the second concave protrusions 132. The second concave grooves 22 are formed in the corresponding concave portions.

The second coupling protrusion 132 has a hook structure. Specifically, the second coupled protrusions 132 are formed in a triangular columnar shape in the Z-axis direction and have a structure in which the cross-sectional area gradually decreases in the Y-axis direction from the direction of the bus bar assembly 130 toward the battery cells 10 consist of. With this structure, when the bus bar assembly 130 is mounted on the upper surface of the cartridges 20, the second coupling protrusion 132 is inserted from a portion having a small sectional area and is easy to mount, A portion of the second coupling protrusion 132 having a large cross-sectional area is brought into close contact with the second coupling grooves 22 in a state in which the protrusion 132 is completely inserted into the second coupling grooves 22, The flow of the cells 10 and the cartridges 20 can be suppressed.

Both ends of the cartridges 20 protrude in the Y-axis direction so as to cover both sides of the bus bar assembly 130.

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 (18)

A plurality of battery cells arranged in a first direction perpendicular to the paper;
A plurality of cartridges having battery cell receiving portions in which battery cells are mounted in units of two, and which are stacked in a first direction in a state in which the battery cells are mounted;
End plates respectively mounted on outer surfaces of the outermost cartridges of the cartridges; And
A bus bar assembly mounted on one side of a battery module where electrode terminals of the battery cells are located;
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A plurality of first coupling protrusions are formed on outer circumferential surfaces of the outer circumferential surfaces of the bus bar assembly that contact the cartridges so that loads in the first direction of the battery cells can be supported and dispersed by the bus bar assembly, Wherein the first coupling grooves are formed in the end portions of the upper surface or the lower surface of each of the cartridges so that the first coupling protrusions are inserted. The battery module according to claim 1, wherein the battery cell is a pouch-shaped battery cell. The pouch-type battery cell according to claim 2, wherein the pouch-shaped battery cell has a structure in which an electrode assembly having a separator structure sandwiched between an anode, a cathode, and an anode and a cathode is built in and sealed together with an electrolyte in a battery case formed of a laminate sheet Wherein the battery module is a battery module. The battery module according to claim 3, wherein the electrode assembly is a folding structure, a stacking structure, a stacking / folding structure, or a lamination / stacking structure. The battery module according to claim 4, wherein the laminate sheet comprises a resin outer layer, a barrier metal layer, and a heat-sealable resin sealant layer. 2. The cartridge according to claim 1, wherein a depressed portion is formed on an upper surface or a lower surface of the cartridge at an end portion corresponding to the first mating protrusions, respectively, And the first engaging groove is formed by a combination of the first indentation formed in the second cartridge and the second indentation formed in the another cartridge. The battery module according to claim 1, wherein the bus bar assembly is mounted on one side of the stacked cartridges by being introduced in a second direction perpendicular to the first direction. The battery module according to claim 7, wherein the first mating protrusion has a rectangular plate-like shape in the second direction. The battery module according to claim 8, wherein the first coupling groove has a shape corresponding to the first coupling protrusion in the second direction. The cartridge according to claim 1, wherein a second engageable protrusion is formed on one surface of the first engaging projection in a third direction so as to suppress the flow of battery cells and cartridges in a second direction, And second coupling grooves are formed in corresponding portions of the first coupling grooves corresponding to the second coupling protrusions. The battery module according to claim 10, wherein the second mating protrusion has a hook structure. The battery module of claim 1, wherein both ends of the cartridges are protruded in a second direction so as to cover both sides of the bus bar assembly. The battery module according to claim 1, wherein the positive and negative terminals of the battery cells are formed on the same side in one side of the second direction. The battery module according to claim 1,
Cooling members respectively mounted between the two units of the battery cells;
Insulation members respectively mounted between the outermost battery cells and the end plates; And
Cushioning members respectively mounted between the insulating members and the battery cells;
The battery module further comprising: The battery module according to claim 1, wherein the battery cell is a lithium secondary battery. A battery pack comprising the battery module according to claim 1. A device as claimed in claim 16 comprising a battery pack as a power source. 18. The device of claim 17, wherein the device is selected from an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, and a power storage device.

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