KR20170085675A - Battery Pack Having Battery Modules of Symmetric Structure - Google Patents

Abstract

The present invention provides battery modules each comprising a plurality of battery cells, wherein at least two battery modules are arranged symmetrically with respect to the remaining battery modules, A battery management system (BMS) mounted adjacent to the battery modules for monitoring and controlling the operation of the battery modules; A Battery Disconnect Unit (BDU) mounted adjacent to the battery modules and controlling an electrical connection of the battery modules; A base plate having a structure in which the battery modules are mounted on an upper surface and a lower end is fixed to an external device; And a pack cover configured to surround the battery modules and to be coupled to an outer periphery of the base plate; And a battery pack.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery pack having a symmetric structure,

The present invention relates to a battery pack including battery modules mounted in a symmetrical structure.

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, since such an automotive battery pack is generally mounted in an internal space such as a trunk, it is electrically connected to each device, so that it occupies an excessively large space in the vehicle. Accordingly, There is a limit to fully utilizing it.

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 described later, at least two or more battery modules among the battery modules are arranged in a symmetrical structure spaced apart from the remaining battery modules. The size, shape, and structure of the battery pack can be more variously configured. Accordingly, it is possible to overcome the limitation on the mounting position of the battery pack in a device such as an automobile, Can be minimized and space utilization of the device can be maximized, and the present invention has been accomplished.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a battery pack comprising battery modules each comprising a plurality of battery cells, wherein at least two battery modules are arranged in a symmetrical structure Battery modules;

A battery management system (BMS) mounted adjacent to the battery modules for monitoring and controlling the operation of the battery modules;

A Battery Disconnect Unit (BDU) mounted adjacent to the battery modules and controlling an electrical connection of the battery modules;

A base plate having a structure in which the battery modules are mounted on an upper surface and a lower end is fixed to an external device; And

A pack cover configured to surround the battery modules and to be coupled to an outer periphery of the base plate;

As shown in FIG.

Therefore, the battery pack according to the present invention includes a structure in which at least two or more battery modules among the battery modules are arranged in a symmetrical structure spaced apart from the remaining battery modules, so that the size, shape, Thus, it is possible to overcome the limitation on the mounting position of the battery pack in a device such as an automobile, minimize the volume of the battery pack relative to the capacity, and maximize the space utilization of the device And provides an effect that can be achieved.

In one specific example, the symmetrical arrangement of the battery modules comprises a first battery module assembly comprising two or more battery modules, and a second battery module assembly comprising two or more battery modules, They may be arranged so as to be spaced apart from each other.

In this case, in the first battery module assembly and the second battery module assemblies, the battery modules may be arranged such that each battery cell has the same orientation.

The battery pack having the above structure may be arranged on the lower end of the seat of the device such as an automobile in a plan view so as to balance the weight applied to both sides of the device, It is possible to more easily perform the mechanical design of the device in consideration of the weight.

More specifically, the first battery module assembly and the second battery module assembly may be arranged on both sides of the center of the base plate.

In addition, the BMS is mounted on the upper end of the first battery module assembly, and the BDU is mounted on the upper end of the second paper module assembly, so that the weight applied to both the right and left sides of the device, Respectively.

In another specific example, the BMS is mounted at a position deviated from the upper end of the first battery module assembly toward the first end, and the BDU is mounted at a position deflected from the upper end of the second battery module assembly toward the first end. And the BMS and the BDU may be structured such that the BMS and the BDU are mounted in parallel positions at the top of the first battery module assembly and the second battery module assembly.

Such a structure may be configured such that a battery pack is mounted at a lower end of a rear seat of a device such as an automobile, for example, and an electric component such as a BMS and a BDU protrudes from the upper end of the battery pack.

Meanwhile, the battery pack according to the present invention may have a structure including a manual service member including an external input / output terminal for electrical connection with an external device.

In one specific example, the first battery module assembly and the second battery module assembly may be structured such that a manual service member including an external input / output terminal for electrical connection with an external device is disposed in a space between the first battery module assembly and the second battery module assembly .

In another specific example, the manual service member may be positioned at a height corresponding to 50% to 100% of the height of the battery module assemblies, and at a position corresponding to the external input / output terminal, And the external input / output terminal is exposed to the outside through the opening of the pack cover.

Meanwhile, the battery pack according to the present invention may have a structure in which a cooling member is mounted on the lower ends of the first battery module assembly and the second battery module assembly.

In one specific example,

Cooling fins interposed between the battery cells, respectively; And

A heat dissipating plate which is in thermal contact with one side ends of the cooling fins and is provided with a refrigerant flow path of a hollow structure for the flow of the refrigerant and located between the battery module assemblies and the base plate;

As shown in FIG.

The cooling member includes a first heat dissipation plate mounted on a lower end of a first battery module assembly and a second heat dissipation plate mounted on a lower end of a second battery module assembly, A pipe-connected structure.

At this time, a coolant inlet port may be formed at one side of the first heat dissipation plate, and a coolant outlet port may be formed at the other side of the second heat dissipation plate at a position facing the coolant inlet port.

The cooling member may further include a thermal pad interposed on a surface of the battery module assembly in contact with the battery module.

That is, the cooling member includes a first heat dissipating plate and a second heat dissipating plate corresponding to the lower ends of the first battery module assembly and the second battery module assembly, which are symmetrical, and are connected to each other by a refrigerant pipe And may be configured to utilize the space inside the battery pack.

The base plate according to the present invention is preferably configured to stably mount the symmetrical arrangement structure of the battery modules.

In one specific example, the base plate comprises:

Two or more module receivers on which the battery modules having a symmetrical structure are respectively seated;

At least two end plates located on a side wall of the module housing part and supporting at least a part of the side surfaces of the battery modules;

A partition wall upwardly protruding toward the battery modules on a central portion where the battery modules are not located; And

Fastening portions formed at outer peripheral portions for mechanical coupling with the pack cover;

As shown in FIG.

In addition, the pack cover according to the present invention may include a first cover portion facing the battery module assemblies, and a second cover portion facing the BMS and the portion where the BDU protrudes.

Therefore, the pack cover includes the second cover portion protruding from the position corresponding to the BMS and the BDU located inside, and the first cover portion formed at the position where the BMS and the BDU are not positioned, It is possible to utilize a surplus space that does not exist in the battery pack and to effectively utilize the space inside the battery pack.

The BMS and the BDU are disposed at a position deflected toward the rear of the vehicle. The BMS and the BDU are disposed at the rear of the rear seat of the vehicle, And may be configured to be mounted on the upper end of the first battery module assembly and the upper end of the second battery module assembly, respectively.

Also, the first battery module assembly and the second battery module assembly may include a manual service member including an external input / output terminal for electrical connection with an external device, Or in a lower space of the armrest between the rear seats.

For reference, the battery cell may be a lithium ion battery cell or a lithium ion polymer battery cell, and the secondary battery may be composed of an anode, a cathode, 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 can also provide a device including the battery pack, and the device can be, but not limited to, an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle.

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 pack according to the present invention, at least two or more battery modules among the battery modules are arranged in a symmetrical structure spaced apart from the remaining battery modules, The shape and the structure of the battery pack can be further diversified. Accordingly, it is possible to overcome limitations on the mounting position of the battery pack in a device such as an automobile, minimize the volume of the battery pack, It is possible to provide an effect of maximizing space utilization.

1 is a schematic view showing a structure in which battery modules are mounted in a battery pack according to an embodiment of the present invention;
2 is a schematic view showing a structure in which the battery modules of FIG. 1 are mounted on a base plate;
3 is a schematic view showing the structure of the battery module assembly of FIG. 1;
4 is a schematic view showing the structure of a battery module constituting a battery module assembly according to an embodiment of the present invention;
5 is a schematic view showing a structure of a cooling member mounted at a lower end of the battery modules of FIG. 4;
FIG. 6 is a schematic view showing a structure of a battery pack in which a pack cover is incorporated with the battery modules of FIG. 1 embedded therein.

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 schematic view schematically showing a structure in which battery modules are mounted in a battery pack according to one embodiment, and FIG. 2 is a schematic view showing a structure in which the battery modules of FIG. 1 are mounted on a base plate And FIG. 3 is a schematic view showing the structure of the battery module assembly of FIG.

1, the battery pack 100 includes a base plate 110 having a structure in which battery modules (see FIG. 3) are mounted on an upper surface and a lower end is coupled to an external device.

The first battery module assembly 120 and the second battery module assembly 130 are arranged on the base plate 110 in a spaced relation to each other.

That is, the first battery module assembly 120 and the second battery module assembly 130 are symmetrically arranged on both sides of the center of the base plate 110.

The BMS 140 is mounted on the upper end of the first battery module assembly 120 and the BDU 150 is mounted on the upper end of the second paper module assembly 130. The BMS 140, The BDU 150 is mounted at a position deflected from the upper end of the second battery module assembly 130 toward one end of the first battery module assembly 120.

The above structure is applicable to a case where the BMS 140 and the BDU 150, which are relatively small in size at the upper end of the first battery module assembly 120 and the second battery module assembly 130, The outer shape of the battery pack is formed in such a shape as to utilize a surplus space which does not occupy the volume of the battery pack.

Referring to FIG. 2 together with FIG. 1, the base plate 110 includes a first battery module assembly 120 and a second battery module assembly 130, each of which has a symmetrical structure, and module receiving portions 171 , 172).

The module housings 171 and 172 include a plurality of end plates 180 that support the outer surfaces of the battery modules in a state where the first battery module assembly 120 and the second battery module assembly 130 are mounted. .

The first battery module assembly 120 and the second battery module assembly 130 are not located in a central portion of the first battery module assembly 120. The first battery module assembly 120 includes a partition wall protruding upward in the direction of the battery modules. And the second battery module assembly 130. The remaining space is formed at the lower end of the battery pack to utilize the space.

In addition, the outer peripheral portions of the module housings 171 and 172 on the base plate 110 include fastening portions 190 for mechanical coupling with a pack cover (see FIG. 6) The base plate 110 and the pack cover are coupled to each other through a coupling member such as a bolt or a nut.

Referring to FIG. 3 together with FIG. 1, a first battery module assembly 120 (see FIG. 1), which is composed of six battery modules 121, 122, 123, 131, 132, And the second battery module assembly 130 are mounted.

In this structure, the first battery module assembly 120, which is composed of three battery modules 121, 122 and 123, is located on the left side of the center of the base plate 110, The first battery module assembly 120 and the second battery module assembly 130 are arranged in a structure in which the second battery module assembly 130 composed of the modules 131, 132, and 133 are located, A manual service member 160 including an external input / output terminal for electrical connection with an external device is disposed in a space spaced apart from each other.

The above-described structure can make the size, shape, and structure of the battery pack 100 more various. Accordingly, the battery pack 100 can be mounted in a device such as an automobile, particularly in a space below the rear seats So that the limitation on the mounting position of the battery pack 100 can be overcome and the volume of the battery pack 100 relative to the capacity can be minimized and the space utilization of the device can be maximized .

4 is a schematic view showing a structure of a battery module constituting a battery module assembly according to an embodiment of the present invention. FIG. 5 is a schematic view showing a structure of a cooling member mounted at a lower end of the battery modules of FIG. Are shown.

Referring to FIG. 4 together with FIG. 3, the battery module 200, which is mounted on the upper end of the base plate 110 and constitutes the first battery module assembly 120 and the second battery module assembly 130, Are arranged so as to have the same orientation.

5, the battery module 200 has a structure in which the battery cells 210 are arranged adjacent to each other in a direction perpendicular to the paper surface, and the battery module 200 is cooled And a member (220).

The cooling member 220 is in thermal contact with one end of the cooling fins 230 and the cooling fins 230 interposed between the battery cells 210 and has a hollow refrigerant channel for flowing the refrigerant And a heat dissipation plate 240 positioned between the lower end of the battery module 200 and the base plate 110.

5 shows a structure in which the cooling member 240 is mounted on one battery module 220 for the sake of convenience of explanation. However, since the first battery module assembly 120 and the second battery module assembly 130 The first battery module assembly 120 and the second battery module assembly 130 are divided into two members corresponding to the lower ends of the first battery module assembly 120 and the second battery module assembly 130, It is to be understood that the present invention is not limited thereto.

FIG. 6 is a schematic view showing the structure of a battery pack in which a pack cover is incorporated with the battery modules of FIG. 1 embedded therein.

Referring to FIG. 6 together with FIG. 1, the pack cover 300 has a structure in which battery modules are embedded and joined with the outer periphery of the base plate 110 by a plurality of fastening members 390.

The upper end of the pack cover 300 includes a first cover unit 311 facing the first battery module assembly 120 and a second battery module assembly 130 located inside and a BMS 140 and a BDU 150 And a second cover portion 312 facing a portion protruding from the upper end of the manual service member 160. An opening 320 is formed at a position corresponding to the manual service member 160, (160) is exposed to the outside through the opening (320).

Accordingly, the first cover portion 311, which is not protruded from the upper end of the pack cover 300, can be applied to the rear seat in the vehicle's passenger space, and the manual service member 160 can be installed in a portion So that it can protrude from the armrest portion between the rear seats of the vehicle. Therefore, it is possible to utilize the space efficiently and to have an easy electrical connection structure.

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 (22)

Wherein the at least two battery modules are arranged in a symmetrical structure with the remaining battery modules being spaced apart from each other;
A battery management system (BMS) mounted adjacent to the battery modules for monitoring and controlling the operation of the battery modules;
A Battery Disconnect Unit (BDU) mounted adjacent to the battery modules and controlling an electrical connection of the battery modules;
A base plate having a structure in which the battery modules are mounted on an upper surface and a lower end is fixed to an external device; And
A pack cover configured to surround the battery modules and to be coupled to an outer periphery of the base plate;
The battery pack comprising: The battery module of claim 1, wherein the symmetrical arrangement of the battery modules comprises: a first battery module assembly including two or more battery modules; and a second battery module assembly including two or more battery modules, Wherein the battery pack is arranged in a state of being spaced apart from each other. The battery pack according to claim 2, wherein the battery modules in the first battery module assembly and the second battery module assemblies are arranged so that each battery cell has the same orientation. The battery pack according to claim 3, wherein the first battery module assembly and the second battery module assembly are arranged on both sides of the center of the base plate. The battery pack according to claim 4, wherein a BMS is mounted on an upper end of the first battery module assembly, and a BDU is mounted on an upper end of the second paper module assembly. The BMS according to claim 5, wherein the BMS is mounted at a position deviated from the upper end of the first battery module assembly toward the first end, and the BDU is mounted at a position deviated toward the first end of the second battery module assembly Battery pack. The battery pack according to claim 6, wherein the BMS and the BDU are mounted in parallel positions at the top of the first battery module assembly and the second battery module assembly. The battery module assembly of claim 2, wherein a manual service member including an external input / output terminal for electrical connection with an external device is disposed in a space between the first battery module assembly and the second battery module assembly Features a battery pack. The battery pack according to claim 8, wherein the manual service member is positioned at a height corresponding to 50% to 100% of the height of the battery module assemblies. The battery pack according to claim 8, wherein an opening is formed in a portion of the pack cover at a position corresponding to the external input / output terminal, and the external input / output terminal is exposed to the outside through an opening of the pack cover. The battery pack according to claim 2, wherein a cooling member is mounted on a lower end of the first battery module assembly and the second battery module assembly. The cooling device according to claim 11,
Cooling fins interposed between the battery cells, respectively; And
A heat dissipating plate which is in thermal contact with one side ends of the cooling fins and is provided with a refrigerant flow path of a hollow structure for the flow of the refrigerant and located between the battery module assemblies and the base plate;
The battery pack comprising: 13. The battery module of claim 12, wherein the cooling member includes a first heat dissipating plate mounted on a lower end of the first battery module assembly and a second heat dissipating plate mounted on a lower end of the second battery module assembly, And the second heat dissipation plate is connected by a refrigerant pipe. 14. The battery pack according to claim 13, wherein a coolant inlet port is formed at one side of the first heat dissipating plate, and a coolant outlet port is formed at the other side of the second heat dissipating plate at a position facing the coolant inflow port. The battery pack according to claim 1, wherein the cooling member further comprises a thermal pad interposed on a surface of the battery module assembly in contact with the battery module. 3. The base plate according to claim 2,
Two or more module receivers on which the battery modules having a symmetrical structure are respectively seated;
At least two end plates located on a side wall of the module housing part and supporting at least a part of the side surfaces of the battery modules;
A partition wall upwardly protruding toward the battery modules on a central portion where the battery modules are not located; And
Fastening portions formed at outer peripheral portions for mechanical coupling with the pack cover;
The battery pack comprising: The battery pack according to claim 1, wherein the pack cover includes a first cover portion facing the battery module assemblies, and a second cover portion facing a portion where the BMS and the BDU protrude. A device comprising a battery pack according to claim 1. 19. The device of claim 18, wherein the device is any one selected from the group consisting of an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle. 20. The device according to claim 19, wherein a battery pack is mounted in a lower space of rear seats among a boarding space of the vehicle. 21. The battery module of claim 20, wherein the BMS and the BDU are mounted on the upper end of the first battery module assembly and the upper end of the second battery module assembly, respectively, at a position deviated toward the vehicle rear direction, corresponding to the shape of the rear seats device. 21. The device of claim 20, wherein the manual service member of the battery pack is located in a lower space of an armrest between rear seats.

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