KR20180113357A - Battery Module with Improved Stability in Long-Term Use - Google Patents

Abstract

The present invention provides a battery module having a structure in which a first end plate and a second end plate are supported by a top end and a bottom end of a module stack in which a plurality of cell modules having a battery cell mounted on a cartridge are stacked. The edges of the first and second end plates are provided with first through holes on which compression springs are mounted. In the cartridge, second through holes are formed at positions communicating with the first through holes. A rod-shaped fastening member is continuously inserted into the first through holes and the second through holes and is coupled to a bolt. The module stack and the first and second end plates are integrally combined in a shape passing through a compression spring mounted on the first through holes. When the volume of the battery cells expands in the module stack, the compression spring is elastically deformed to offset an increase in the thickness of the module stack in the stacking direction.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery module having improved structural stability against long-

The present invention relates to a battery module with improved structural stability for prolonged use.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been extensively used as an energy source or an auxiliary power device for wireless mobile devices. 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.

In small mobile devices, one or two or fewer battery cells are used per device, whereas a middle or large type device such as an auxiliary power device or an automobile is used with a battery module in which a plurality of battery cells are electrically connected due to the necessity of a high output large capacity .

Since the battery module is preferably made as small in size and weight as possible, a prismatic battery, a pouch-shaped battery, or the like, which can be filled with a high degree of integration and has a small weight to capacity, is mainly used as a battery cell (unit cell) of a middle- or large- . In particular, a pouch-shaped battery using an aluminum laminate sheet or the like as an exterior member has recently attracted a lot of attention due to its advantages such as small weight, low manufacturing cost, and easy shape deformation.

Although the battery module can be used alone, it is also possible to construct a battery pack by combining two or more of them. In this case, it is important that each battery module is manufactured in a uniform size.

In the case where each battery module does not have a uniform dimension, that is, if dimensional stability is not maintained, when a strong shock or vibration is applied from the outside, the battery module is not fixed inside the battery pack, ≪ / RTI >

If such dimensional stability is maintained, the durability or safety of the battery pack may be improved from external shocks or vibrations by being configured to fit each dimension.

Generally, a battery module has been used in which a plurality of battery cells are stacked and fixed using a bar-shaped fastening member.

This will be described in detail with reference to FIG. 1 with reference to the structure of a battery module according to the prior art. The battery module 10 according to FIG. 1 includes end plates 2 and 3 for reinforcing rigidity at the upper and lower ends of the stacked body in a state where battery cells (not shown) And the end plates 2 and 3 and the cartridge 1 are integrally combined by a bar-shaped fastening member 4. The end plates 2,

However, in the case of the battery cell, a so-called swelling phenomenon occurs in which the volume of the battery cell is swollen by repetitive charging and discharging. Accordingly, the battery module according to FIG. 1 is deformed to increase the stacking height of the battery cells.

In this case, there is a problem that the end plate is wrinkled while the pressure due to the expansion is concentrated at the remaining portion except the portion where the end plate is fixed by the fastening member, that is, the central portion of the end plate.

Accordingly, there is a high need for developing a battery module having a new assembled structure to solve the above 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 module structure in which the compression spring is elastically deformed even when the volume of the battery cells expands, And the deformation and breakage of the end plates are prevented.

According to an aspect of the present invention,

A structure in which first and second end plates are supported on upper and lower ends of a module laminate having a structure in which a plurality of cell modules having battery cells mounted in cartridges are stacked;

The first and second end plates are formed with first through holes having compression springs mounted thereon;

Wherein the cartridge is provided with second through-holes at a position communicating with the first through-holes;

The rod-shaped fastening member is continuously inserted into the first through-holes and the second through-holes and is coupled to the bolt, while passing through the compression spring mounted on the first through-holes, the module stack and the first and second ends The plates being integrally joined;

And when the volume of the battery cells in the module stack expands, the compression spring is resiliently deformed to offset the module stack thickness increase in the stacking direction.

In other words, the battery module according to the present invention is based on a structure in which the module assembly and the end plates are coupled with each other in such a manner that the fastening members of the bar shape pass through the compression springs, The thickness increase of the module laminate in the stacking direction is canceled, and deformation and breakage of the end plates can be prevented.

In the present invention, the compression spring may be a conical spring having a conical shape. Such a structure is advantageous in that the compression spring can be easily shrunk when the fastening member is fastened. Conversely, when the thickness of the module laminate is increased, the compression spring is easily deformed elastically.

The compression spring may also be a structure in which steel is wound more than once to less than three times.

In the case where the compression spring is of less than one revolution, it can not be regarded as a spring capable of substantially elasticity and restoration, so that the intended effect of the present invention is difficult to achieve. When the winding is performed three times or more, Since the modulus of elasticity formed for each winding radius is small, it is easy to shrink, but the force for pressing the end plate together with the fastening member in a normal state is low, so that the combined state of the module laminate and the end plates is hardly maintained .

In addition, when the elastic modulus of the compression spring is excessively large, pressure of the compression spring forcibly contracted by the fastening member is applied to the cartridge and the end plate, and when the volume of the battery cells expands, Not only the sphere peripheral portion can be deformed but also the shrinkage does not proceed smoothly, so that it is difficult to offset the thickness increase of the module laminate when the volume expansion of the battery cell expands.

On the other hand, when the elastic modulus of the compression spring is too small, as described above, since the force for pressing the end plate together with the fastening member in a normal state is low, the combined state of the module laminate and the end plates is difficult to maintain there is a problem.

In view of this, the elastic modulus of the compression spring in the present invention may be (400 / n) N / mm to (1300 / n) N / mm. The number n is a total number of compression springs to be mounted on the battery module, and the number may be appropriately selected according to the structure of the battery module. For example, two or more and not more than 30, More specifically, not less than four and not more than eight.

The coupling member may integrally join the cell module laminate and the first and second end plates in a state where the compression spring is pressed to a height of 10% to 60% of the height of the compression spring in the uncompressed state.

When the volume of the battery cell expands, the compression spring is elastically deformed to offset the module stack thickness increase in the stacking direction in the stacking direction when the tightening member is in a state in which the compression spring is excessively pressed, It is difficult to achieve the intended effect of the present invention.

On the other hand, when the fastening member exceeds the maximum value of the range in which the compression spring is loosely pressed, it is difficult to maintain the solid state of the module laminate and the first and second end plates. For example, When vibrating or impacting, the cartridge or end plates of the module stack can flow within the height of the compression spring. This is undesirable in that direct impact and vibration may be applied to the battery cells constituting the module laminate.

The compression spring may be attached to the first through hole integrally with the peripheral portion of the first through hole. Alternatively, the compression spring may be mounted removably from the first through-hole.

Meanwhile, the fastening member is a taper bolt;

The maximum inner diameter of the compression spring may be between 100% and 105% of the maximum outer diameter of the taper bolt.

Below the minimum value of the above range, the compression spring is fixed to the taper bolt, and elastic deformation is difficult to be achieved sufficiently. In the case of exceeding the maximum value of the above range, in the state where the fastening member is fastened, The compression spring can be released from the fastening member through the fastening member, which is not preferable.

In one specific example, each of the first end plate and the second end plate may be formed in a planar shape with a rectangular shape, and a corner where the first through hole is formed may protrude outward.

The first end plate and the second end plate may be formed with a plurality of beads for flow of air and for reinforcing the rigidity of the plate.

In one specific example, the cartridge may be formed in a planar, rectangular shape, and a structure in which the corner where the second through-hole is formed protrudes outwardly.

Here, the cartridge is a ring-shaped open-type cartridge including an outer peripheral fixing portion for fixing along the outer periphery of the battery cell;

The outer surface of the battery cell is exposed through the cartridge with the battery cell mounted on the cartridge;

The heat dissipating fins may be mounted on the outer surface of the exposed battery cell.

At least one of the cell modules constituting the module laminate has a fastening protrusion formed in its cartridge;

The battery module may be mounted to another battery module or device through a fastening protrusion.

Further, a third through hole may be formed in the fastening protrusion, and another fastening member such as a screw, bolt, or rivet may be fastened to the third through hole.

The electrode terminals of the battery cells in the module laminate may be arranged on one side of the module stack, and the battery module may include an insulating member having an opening through which the electrode terminals arranged as described above can pass, And a bus bar assembly electrically connected to the electrode terminals.

In the present invention, the battery cell 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, (Li-ion polymer) secondary battery, and 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, the battery module according to the present invention is based on a structure in which the module-stacked body and the end plates are coupled with each other in such a manner that the bar-shaped fastening member passes through the compression spring. Even if the volume of the battery cells expands, Is elastically deformed to offset the increase in thickness of the module laminate in the lamination direction, so that deformation and breakage of the end plates can be prevented.

1 is a schematic diagram of a battery module according to the prior art;
2 is a schematic diagram of a battery module according to one embodiment of the present invention;
3 is a schematic view of a compression spring.

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. 2 is a schematic diagram of a battery module 100 according to an embodiment of the present invention.

2, the battery module 100 includes a battery cell 140, a cartridge 130, a first end plate 110, a second end plate 120, a compression spring 160, and fastening members 170 ).

The battery cell 140 is mounted on the cartridge 130 and is defined as a cell module 140. The cell modules 140 are stacked upward with respect to the paper surface to form a module laminate.

A first end plate 110 and a second end plate 120 are arranged at the upper and lower ends of the module stack, respectively.

Each of the first end plate 110 and the second end plate 120 is formed in a planar shape with a rectangular shape and has corners protruding outwardly. A first through hole 101 is formed at a protruded corner have. The first through holes 101 are fitted with compression springs 160.

The first end plate 110 and the second end plate 120 also include a plurality of beads 103 capable of flowing air and reinforcing the rigidity of the end plates 110 and 120.

The cartridge 130 is formed in a planar shape, and has a structure in which the corners protrude outward. Here, a second through-hole 102 is formed in the corners of the cartridge 130.

The corners of the second through hole 102 and the cartridge 130 are located at positions corresponding to the corners of the first end plate 110 and the second end plate 120 and the first through hole 101, When the cartridges 130 and the end plates 110 and 120 are arranged as shown in FIG. 2, the first through-hole 101 and the second through-hole 102 are formed And are communicated with each other.

The cartridge protrusions 180 are formed on the two cartridges of the cartridges 130 constituting the module laminate body and the third through holes 182 are formed in the fastening protrusions 180. The third through-hole 182 is for fastening to another battery module 100 or device.

Although not shown in the drawing, the cartridge 130 is a ring-shaped open type cartridge 130 including an outer peripheral fixing portion for fixing along the outer periphery of the battery cell 140.

The outer surface of the battery cell 140 is exposed through the cartridge 130 while the battery cell 140 is mounted on the cartridge 130 and the heat dissipation fins are mounted on the outer surface of the exposed battery cell 140.

The module laminate including the cartridges of the above structure is fastened by a fastening member of a bar shape together with the end plates 110 and 120.

Specifically, a taper bolt 170, which is a bar-shaped fastening member, is continuously inserted into the first through-holes 101 and the second through-holes 102, so that the second end plate 120 of the lowermost end When the taper bolt 170 is passed through the through hole 102, the taper bolt 170 is fastened to the nut 172 to integrally join the module laminate and the first and second end plates 120.

Here, the battery pack according to the present invention includes a compression spring 160. In the state where the taper bolt 170 is passed through the compression spring 160 mounted on the first through holes 101, Passes through the first through-hole 101 of the end plate 110, the second through-holes 102 of the cartridges, and the first through-hole 101 of the second end plate 120 in this order. The taper bolts 170 are fastened to the nuts 172 in a state of passing through the compression springs 160 mounted on the first through holes 101 of the second end plate 120, 1 and the second end plates 110, 120 are integrally joined.

The advantage of this structure is that even when the volume of the battery cells 140 constituting the module laminate is expanded, the pressure applied to the end plates 110 and 120, as compared with the battery module 10 of Fig. 1 according to the prior art, Is also applied to the compression spring 160, so that as the compression spring 160 contracts, the pressure applied to the end plates 110, 120 can be reduced.

In other words, in the present invention, the compression spring 160 is elastically deformed by the pressure due to the expansion of the battery cell 140, thereby offsetting the module stack thickness increase in the stacking direction, so that the plates 110, It is important to note that you can withstand.

This is because the pressure due to the expansion is dispersed by the compression springs 160 located at the respective corners of the battery module 100 so that any part of the end plates 110 and 120, Can be solved.

3 is a schematic diagram of a compression spring 160 according to one embodiment of the present invention.

Referring to FIG. 3, the compression spring 160 is formed of a conical spring having a small inner diameter in a downward direction. The compression spring 160 also has a structure wound about 2.5 times.

Such a conical spring has advantages of easy shrinkage and elastic deformation when an external force is applied, and is suitable for achieving the intended effect of the present invention.

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 battery module,
A structure in which first and second end plates are supported on upper and lower ends of a module laminate having a structure in which a plurality of cell modules having battery cells mounted in cartridges are stacked;
The first and second end plates are formed with first through holes having compression springs mounted thereon;
Wherein the cartridge is provided with second through-holes at a position communicating with the first through-holes;
The rod-shaped fastening member is continuously inserted into the first through-holes and the second through-holes and is coupled to the bolt, while passing through the compression spring mounted on the first through-holes, the module stack and the first and second ends The plates being integrally joined;
Wherein when the volume of the battery cells in the module stack expand, the compression spring elastically deforms to offset the module stack thickness increase in the stacking direction. The battery module according to claim 1, wherein the compression spring is a conical spring. The battery module according to claim 1, wherein the elastic modulus of the compression spring is (400 / n) N / mm to (1300 / n) N / mm, and n is the total number of compression springs. 2. The battery module assembly according to claim 1, wherein the fastening member is integrally joined to the cell module stack body and the first and second end plates in a state where the compression spring is pressed to a height of 10% to 60% Wherein the battery module is a battery module. The battery module according to claim 1, wherein each of the first end plate and the second end plate has a rectangular shape, and the first through-hole is formed in a corner . The battery module according to claim 1, wherein the compression spring is mounted on the first through hole integrally with the peripheral portion of the first through hole. The battery module according to claim 1, wherein the compression spring is detachably mounted on the first through hole. The battery module according to claim 1, wherein the compression spring is a structure in which the steel is wound more than once to less than three times. The method according to claim 1,
The fastening member is a taper bolt;
Wherein a maximum inner diameter of the compression spring is 100% to 105% with respect to a maximum outer diameter of the taper bolt. The battery module according to claim 1, wherein a plurality of beads are formed on the first end plate and the second end plate. The battery module according to claim 1, wherein the cartridge has a rectangular shape in a plan view, and a corner where a second through-hole is formed is protruded outward. 12. The method of claim 11,
Wherein the cartridge is a ring-shaped open-type cartridge including an outer circumferential fixing portion for fixing along the periphery of the battery cell;
The outer surface of the battery cell is exposed through the cartridge with the battery cell mounted on the cartridge;
And a heat dissipating fin is mounted on an outer surface of the exposed battery cell. The method according to claim 1,
At least one of the cell modules constituting the module laminate has a fastening protrusion formed in its cartridge;
Wherein the battery module is mounted to another battery cell or device through the fastening protrusion. 14. The battery module according to claim 13, wherein a third through-hole is formed in the fastening protrusion. The battery module according to claim 1, wherein the electrode terminals of the battery cells in the module stack are arranged on one side of the module stack.

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