KR101233060B1 - Battery Pack of Excellent Structural Stability - Google Patents

Abstract

The present invention is a battery module array in which (a) the battery cells themselves or two or more battery cells are built in a vertical or inverted form of the unit modules built-in stacked battery modules arranged in two or more rows in the lateral direction ; (b) a pair of side support members (front support member and rear support member) for supporting the front and rear surfaces of the battery module assembly in close contact with the outermost battery module of the battery module assembly; (c) two pairs of lower support members coupled to the lower ends of the side support members to support the lower ends of the battery modules; (d) two or more first upper mounting members having an upper end of the side support members coupled thereto, an upper end of the battery modules coupled thereto, and having one or both ends coupled to an external device; (e) a second upper mounting member coupled to the upper ends of the first upper mounting members in a structure perpendicularly intersecting with the first upper mounting members, the both upper ends of which are fastened to an external device; (f) a front mounting member located on the front surface of the battery module assembly and coupled to the lower ends of the first upper mounting members, the front mounting member having a structure in which both ends are fastened to an external device; And (g) a lower plate positioned below the lower support members to provide a space used as a discharge passage of the refrigerant.

Description

Battery Pack with Excellent Structural Stability {Battery Pack of Excellent Structural Stability}

The present invention relates to a battery pack having excellent structural stability, and more particularly, a pair of battery module arrays having two or more rows of battery modules arranged in a lateral direction, and a pair of front and rear surfaces of the battery module array, respectively. Side support members, two pairs of lower support members supporting lower ends of the battery modules, two or more first upper mounting members to which the upper ends of the side support members are coupled and the upper ends of the battery modules are coupled; The first upper mounting member, the second upper mounting member coupled to the upper end of the first mounting member in a structure perpendicular to the upper mounting member, the front mounting is located on the front of the battery module assembly is coupled to the lower end of the first upper mounting member A battery pack including a member and a lower plate positioned below the lower support members to provide a space used as a discharge passage for the refrigerant .

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. Secondary batteries are also attracting attention as a power source for electric vehicles (EVs) and hybrid electric vehicles (HEVs), which are proposed as a way to solve air pollution in conventional gasoline and diesel vehicles that use fossil fuels. .

One or two or four battery cells per device are used in small mobile devices, while battery packs that electrically connect a plurality of battery cells are used in medium and large devices such as automobiles due to the necessity of high output capacity.

Since the battery pack is preferably manufactured in a small size and weight as much as possible, a square battery, a pouch-type battery, etc., which can be charged with high integration and have a small weight to capacity, are mainly used as battery cells of the battery pack. 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.

In order for a battery pack to provide the output and capacity required in a given device or device, a plurality of battery cells must be electrically connected in series and be able to maintain a stable structure against external force.

In addition, since the battery cells constituting the medium-large battery pack is composed of a secondary battery capable of charging and discharging, such a high output large-capacity secondary battery generates a large amount of heat during the charging and discharging process. If this is not effectively removed, thermal accumulation occurs and consequently promotes deterioration of the battery cell, and in some cases, there is a risk of fire or explosion. Therefore, a cooling system for cooling the battery cells built in the vehicle battery pack, which is a high-output large-capacity battery, is required.

On the other hand, the conventional battery pack has a problem in that the number of parts increases and the overall structure of the battery pack is increased by using a separate lower duct to secure the space used as the discharge passage of the refrigerant.

In addition, the lower duct mounted on the lower part of the battery pack is made of steel to increase the weight of the battery pack, which reduces the energy efficiency of the vehicle, that is, fuel economy, and furthermore, the lower duct made of steel in the connection with the exhaust duct There are problems that leakage of refrigerant occurs.

Therefore, there is a need for a battery pack having a structure capable of reducing the weight of the battery pack and preventing leakage of refrigerant from occurring at a connection portion between the lower duct and the discharge duct.

In addition, there is a need for a battery pack having a specific structure capable of compactly configuring a battery pack including battery modules arranged in two or more rows to secure output and large capacity from vibration and shock.

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

Specifically, an object of the present invention, by placing the lower plate in the lower portion of the lower support member, to secure the space used as the discharge passage of the refrigerant without using a separate lower duct to reduce the number of parts of the battery pack and to reduce the size It is to provide a battery pack structure that can be minimized.

Another object of the present invention is to provide a battery assembly by assembling the battery module assembly to the first upper mounting members, the second upper mounting member, the lower supporting members, and the front mounting member of a specific structure consisting of an I-beam or a tubular structure. The weight of the pack is maintained in the tubular structure to provide a compact battery pack structure as a whole.

Still another object of the present invention is to provide a battery pack structure which can be stably mounted in a vehicle and minimize the volume occupied in the vehicle by forming a partial structure of the battery pack using some forms of the vehicle.

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

(a) a battery module arrangement in which two or more battery cells are arranged in an upright or inverted form in which battery modules themselves or two or more battery cells are built, in which two or more battery modules are arranged in a lateral direction;

(b) a pair of side support members (front support member and rear support member) for supporting the front and rear surfaces of the battery module assembly in close contact with the outermost battery module of the battery module assembly;

(c) two pairs of lower support members coupled to the lower ends of the side support members to support the lower ends of the battery modules;

(d) two or more first upper mounting members having an upper end of the side support members coupled thereto, an upper end of the battery modules coupled thereto, and having one or both ends coupled to an external device;

(e) a second upper mounting member coupled to the upper ends of the first upper mounting members in a structure perpendicularly intersecting with the first upper mounting members, the both upper ends of which are fastened to an external device;

(f) a front mounting member located on the front surface of the battery module assembly and coupled to the lower ends of the first upper mounting members, the front mounting member having a structure in which both ends are fastened to an external device; And

(g) a lower plate positioned below the lower support members to provide a space used as a discharge passage of the refrigerant;

It is composed of a structure including a.

Therefore, the battery pack according to the present invention can easily secure the space used as the discharge passage of the refrigerant without using a separate lower duct like the conventional battery pack by placing the lower plate under the lower support members. .

In addition, since both ends of the front mounting member and the second upper mounting member and one or both ends of the first upper mounting member are fastened to the external device, the battery pack can be easily and stably connected to an external device such as a vehicle. Can be mounted.

Moreover, since the pair of side support members respectively support both sides of the battery module assembly, it is possible to reliably reinforce the bending rigidity of the lower support members coupled to the lower ends of the side support members, and The structural reliability of the entire battery pack can be sufficiently secured.

For reference, in the present specification, the directions are based on the state of seeing the battery module assembly from the front of the battery module assembly (C of FIG. 2), 'before', 'after', 'left', 'right', It is expressed by setting 'up' and 'down'.

The unit module in the present invention may be a secondary battery itself or a small module having two or more secondary batteries built therein. An example of a unit module having two or more secondary batteries embedded therein may be the module of Korean Patent Application No. 2006-12303. The unit module in the above application has a structure mounted on a frame member in which an input / output terminal is formed in close contact with two secondary batteries facing each other.

Another example of a unit module may include the modules of Korean Patent Application Nos. 2006-20772 and 2006-45444. The unit module in these applications consists of a structure in which two secondary batteries are covered with a pair of high-strength cell covers while their outer surfaces are in close contact with each other.

The above applications are incorporated by reference in the context of the present invention. However, of course, the structure of the unit module in the battery module of the present invention is not limited to the examples of the above applications.

The battery cell is preferably a plate-shaped battery cell in order to provide a high lamination rate in a limited space, for example, it may be made of a structure in which the electrode assembly is built in the battery case of the laminate sheet.

Specifically, the battery cell is a pouch type secondary battery in which an electrode assembly having a cathode / separation membrane / cathode structure is sealed inside the battery case together with an electrolyte, and has a plate-shaped shape having a substantially rectangular parallelepiped structure with a thin thickness to width. Such a pouch-type secondary battery is generally made of a pouch-type battery case, the battery case is an outer coating layer made of a polymer resin having excellent durability; A barrier layer made of a metal material exhibiting barrier properties against moisture, air, and the like; And an inner sealant layer made of a polymer resin that can be heat-sealed; and a laminate sheet structure in which the inner sealant layer is sequentially stacked.

In one preferred example, the lower plate may be made of an injection molding, and as an example, the injection molding may be a polymer resin.

Therefore, the lower plate made of an injection molding is preferable because it can reduce the weight of the battery pack compared to the lower plate made of a conventional steel.

In another preferred example, the lower plate may have a structure in which the outer peripheral portion adjacent to the lower support member is bent upward.

In the above structure, the outer periphery of the lower plate is formed with one or more support protrusions protruding downward in a relatively longer length than the bottom surface of the main body of the lower plate, so that the support protrusions support the battery pack in contact with the external device When the pack is placed on the floor, sagging due to the load of the battery pack and the lower plate can be easily prevented from being deformed.

The support protrusion may have various embodiments according to the structure of the desired battery pack.

As one example, the support protrusion is not particularly limited as long as it is a structure capable of easily supporting the battery pack, for example, it may be made of a hollow structure of circular or polygonal shape on a horizontal cross section.

As another example, an upper protrusion may be formed at an upper end of the outer circumferential portion corresponding to the support protrusion based on the outer circumferential portion of the lower plate.

Therefore, the space between the lower plate formed by the upward protrusion and the lower support member is utilized as the discharge space of the refrigerant.

Preferably, two or more support protrusions are formed on each outer peripheral part of the lower plate, so that the load of the battery pack can be easily supported. More preferably, three support protrusions are formed on both outer peripheral parts of the lower plate at equal intervals. Can be.

The support protrusion is preferably integrally formed by the lower plate and the injection molding, so that the number of manufacturing processes can be reduced and the connection portion can be more firm as compared with that of the support protrusion and the lower plate, respectively.

The lower end of the support protrusion may be a structure that is in contact with or mounted to various devices, for example, may be a structure that is in contact with the panel of the vehicle.

In addition, the battery pack according to the present invention, for example,

The battery modules are built in each pack case,

In the pack case, the refrigerant inlet and the refrigerant outlet are opposite to each other so that the refrigerant for cooling the battery cells may flow from one side of the battery module to the opposite side in a direction perpendicular to the stacking direction of the battery cell or the unit module. Located above and below

The coolant inlet, which is a flow space from the coolant inlet to the battery module, and the coolant outlet, which is a flow space from the battery module to the coolant outlet, are formed at the top and bottom of the pack case, respectively.

The refrigerant discharge duct communicating with the refrigerant outlet may be configured to extend upward from the refrigerant outlet along the side surface of the battery module arrangement.

The battery pack has a refrigerant discharge duct communicating with the refrigerant outlet extending upward from the refrigerant outlet along the side of the battery module array, and the refrigerant flowing into the refrigerant inlet located above the battery module cools the battery module. Passes through the refrigerant outlet located at the bottom of the discharge is discharged to the top of the battery module array along the refrigerant discharge duct.

In one preferred example, the lower plate has one end coupled to the side support member and the other end coupled to one lower end surface of the refrigerant discharge duct, whereby the refrigerant leaks at the coupling portion of the lower plate and the refrigerant discharge duct. Can be prevented.

In another preferred example, the suction fan that provides a driving force for moving the refrigerant from the refrigerant inlet to the refrigerant outlet after passing through the battery module, the impact on the battery module assembly when the external force is applied from the side direction of the battery pack In order to minimize the, it may be configured in a structure that is mounted at a position higher than the top of the battery module array.

Therefore, the battery pack has a suction fan is mounted at a position higher than the upper end of the battery module array, it is possible to minimize the impact of the suction fan on the battery module assembly when an external force is applied from the front direction of the battery pack.

In addition, since the suction fan is connected to the refrigerant discharge duct extending upwardly from the refrigerant outlet along the side of the arrangement of the battery module, the refrigerant passes through the battery module from the refrigerant inlet and then moves to the refrigerant outlet to speed up the battery. It is possible to improve the cooling efficiency of the cells or unit modules.

The first upper mounting members, the second upper mounting member, the lower support members, and the front mounting member are configured in the form of an I-beam or a tube in a vertical cross section, so that the vibration and impact of the battery pack are achieved. The deformation for can be minimized by a square tube with a high moment of inertia.

The square tube may preferably be a square pipe or a round pipe, and these shapes may have a large moment of inertia compared to a conventional frame having a plate shape or a I-shape or the like, and have a large moment of inertia. It can improve the shock resistance.

In some cases, the upper part of the first upper mounting member and the second upper mounting member may have a structure in which an electric component is additionally mounted by a frame, and the electric component is optimized by monitoring a state of a battery, for example. Battery Management System (BMS) that automatically manages the battery system to maintain and use it under conditions, predicts when the battery needs to be replaced, and proactively detects the battery in question, and blocks and connects high voltage flow. It may include a power relay assembly (PRA).

On the other hand, the side support member is not particularly limited as long as it is a shape that can easily support both sides of the battery module array, for example, may be made of a planar rectangle.

The first upper mounting members are not particularly limited as long as they can easily mount an upright or inverted battery module. For example, two end members and two battery modules coupled to both ends of the battery module assembly, respectively. It is composed of one central member coupled to the center of the arrangement, so that the mass of the battery module assembly can be maintained evenly as a whole.

As one example, both ends of the front mounting member may be bent upwardly in parallel with the second upper mounting member to facilitate coupling to an external device, and may have a structure in which a fastener is formed at the bent portion. .

As another example, both end portions of the second upper mounting member may be bent downward in parallel with the front mounting member to facilitate coupling to an external device, and a fastener may be formed at the bent portion. .

The present invention also provides a vehicle that uses the battery pack as a power source, has a limited mounting space, and is exposed to frequent vibrations and strong shocks.

The battery pack used as the power source of the vehicle can of course be manufactured in combination according to the desired output and capacity.

In this case, the vehicle may be an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle.

Electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles using the battery pack as a power source is known in the art, so a detailed description thereof will be omitted.

As described above, in the battery pack according to the present invention, since the lower plate is positioned under the lower support members, a space used as a discharge passage of the refrigerant can be secured without using a separate lower duct. The number can be reduced.

In addition, the battery pack according to the present invention, since the battery module assembly is assembled to the first upper mounting members, the second upper mounting member, the lower support members, and the front mounting member made of an I-beam or a tubular structure, the battery pack Can maintain the mass in the tubular structure.

Furthermore, by forming some structures of the battery pack using some forms of the vehicle, it is possible to stably mount in the vehicle and minimize the volume occupied in the vehicle.

1 and 2 are top and bottom perspective views of a battery pack according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic diagram showing a portion E of FIG. 1; FIG.
4 is a schematic vertical cross-sectional view showing a structure in which the battery module of FIG. 2 is mounted in a pack case.

Hereinafter, although described with reference to the drawings of the battery pack according to an embodiment of the present invention, this is for easier understanding of the present invention, the scope of the present invention is not limited thereto.

1 and 2 are top and bottom perspective views of the battery pack according to an embodiment of the present invention.

3 is an enlarged schematic diagram showing an E portion of FIG. 1, and FIG. 4 is a vertical cross-sectional schematic diagram showing a structure in which the battery module of FIG. 2 is mounted on a pack case.

First, referring to FIGS. 1 to 3, the battery pack 800 includes a battery module assembly 300, a pair of side support members, a front support member 570 and a rear support member 580, and two pairs of lower ends. With support members 596, three first upper mounting members 502. 504, 506, a second upper mounting member 510, a front mounting member 520, and a pair of lower plates 590. Consists of.

The battery module array 300 has two modules arranged in an upright shape in which the module modules are stacked upright, and the battery modules 300a and 300b are arranged in two rows in a lateral direction, and the front support member 570 and the rear support member 580. ) Supports the front and rear surfaces of the battery module assembly 300 in a state of being in close contact with the outermost battery module of the battery module assembly 300.

The lower support members 596 are coupled to the lower ends of the front support member 570 and the rear support member 580 to support lower ends of the battery modules 300a and 300b, and the first upper mounting members 502. 504 and 506 are coupled to the upper end of the front support member 570 and the rear support member 580, and the upper ends of the upright battery modules 300a and 300b are coupled and one end is fastened to an external device. consist of.

The second upper mounting member 510 is vertically intersecting with the first upper mounting members 502. 504 and 506, and is coupled to an upper end of the first upper mounting members 502. 504 and 506. Both ends are configured to be fastened to the external device.

The front mounting member 520 is located at the front of the battery module assembly 300, is coupled to the lower end of the first upper mounting members (502. 504, 506), both ends are composed of a structure that is fastened to the external device The lower plate 590 is positioned below the lower support members 596 to provide a space used as a discharge passage of the refrigerant.

In the present specification, the directions are based on the state of seeing the battery module assembly 300 from the front surface C of the battery module assembly 300, 'before', 'after', 'left', 'right', It is expressed by setting 'up' and 'down'.

In addition, the lower plate 590 is formed of an injection of polymer resin, and the outer peripheral portion 592 adjacent to the lower support member 596 is bent upward.

Since the two outer peripheries of the lower plate 590 are formed at equal intervals, respectively, three support protrusions 593 protruding downwardly longer than the bottom surface of the main body of the lower plate 590 are formed at equal intervals. It is in contact with the panel (not shown).

The support protrusion 593 is a hollow hollow structure having a circular cross-section in a horizontal cross section, and is integrally formed with the lower plate 590 by injection molding. An upward protrusion 594 is formed at an upper end thereof in contact with the lower support member 596.

Next, referring to FIGS. 1 and 2 together with FIG. 4, the battery pack 800 includes a battery module assembly 300, a pair of refrigerant inlets 310 and a refrigerant outlet 320, and a pair of refrigerant inlets. The unit 340 includes a coolant discharge unit 350, a pair of coolant discharge ducts 530, and a suction fan 540.

The coolant inlet 310 and the coolant outlet 320 may mutually flow from one side of the battery module 300a to the opposite side in a direction perpendicular to the stacking direction of the unit modules 330. The battery module 300a is positioned above and below in the opposite direction.

The coolant inlet 340, which is a flow space from the coolant inlet 310 to the battery module 300a, is positioned above the battery module 300a and is a flow space from the battery module 300a to the coolant outlet 320. The coolant discharge part 350 is located under the battery module 300a.

The coolant discharge duct 530 extends upward from the coolant outlet 320 along the side surface of the battery module assembly, and passes through the coolant inlet 340 from the coolant inlet 340 to the coolant outlet 320. The suction fan 540 which provides a driving force for moving is mounted at a position higher than the upper end of the battery module assembly 300. Therefore, when the external fan is applied from the front direction C of the battery pack 800, the suction fan 540 minimizes impact on the battery module assembly 300, thereby ensuring safety. For reference, the front direction C of the battery pack 800 corresponds to the rear of the vehicle.

The first upper mounting members 502, 504, 506, the second upper mounting member 510, the lower supporting members 596, and the front mounting member 520 are formed of square tubes having a rectangular pipe shape on a vertical cross section. The BMS 550 and the PRA 560 are mounted to the top of the first upper mounting members 502, 504, 506 and the second upper mounting member 510 by frames.

The front support member 570 and the rear support member 580 are formed in a planar rectangle, and the lower plate 590 has one end coupled to the rear support member 580, and the other end of the refrigerant discharge duct 530. It is coupled to one side of the bottom surface.

The first upper mounting members 502, 504, 506 are coupled to the centers of the two end members 502, 504 and the battery module assembly 300, respectively, which are coupled to both ends of the battery module assembly 300, respectively. It consists of one center member 506 which becomes.

In addition, both ends of the front mounting member 520 are bent upwardly in parallel with the second upper mounting member 510, and a fastener 522 is formed at the bent portion to facilitate coupling to an external device. To achieve.

Both ends of the second upper mounting member 510 are bent downward in parallel with the front mounting member 520, and a fastener 512 is formed at the bent portion, thereby easily coupling to an external device. .

Finally, referring to FIG. 4, in the pack case 370, a length corresponding to the stacking direction L of the unit modules 330 is relatively longer than a length corresponding to the width direction W of the unit modules 330. It is formed long.

A small flow path 360 through which the coolant moves is formed between the unit modules 330, so that the coolant flowing from the coolant inlet 310 moves through the flow path 360 to generate heat generated by the unit module 330. After removal, the refrigerant is discharged through the outlet 320.

4, the inclination angle B of the coolant inlet 310 is greater than the inclination angle A of the inclined surface starting at the opposite end of the coolant inlet 310. In addition, the width d of the refrigerant inlet 310 has a size of approximately 10% based on the length l of the pack case corresponding to the length of the battery module 332.

When the coolant is introduced from the coolant inlet 310 and moves along the coolant inlet 340 having the inclination angle B of the coolant inlet 310 and the inclination angle A of the inclined surface, the flow cross-sectional area of the coolant is determined by the coolant inlet. The further away from the end 344 of the 310 is gradually reduced by the angle (A) of the inclined surface. In this process, the moving speed of the refrigerant gradually increases, but the flow rate of the refrigerant decreases, and the refrigerant reaches the unit modules 330 located at a distance from the refrigerant inlet 310 and the unit modules adjacent to the refrigerant inlet 310. All unit modules located at a long distance from the refrigerant inlet 310 are uniformly cooled

In order to minimize the temperature variation by increasing the uniformity of the coolant, the inclination angle A of the inclined surface has an inclination of approximately 4 degrees with respect to the top surface of the battery module 332, and the inclination angle of the coolant inlet 310 ( B) is formed on the upper inner surface 342 of the refrigerant inlet 340, each having an inclination of approximately 20 degrees. In addition, the width d of the refrigerant inlet is approximately 10% based on the length l of the pack case 370.

In addition, the pack case 370 has two inclined structures in which the inclination A of the opposite end of the coolant inlet 310 is smaller than the inclination B of the coolant inlet 310. It is possible to prevent the phenomenon in which the driving direction 220 is present, it is possible to effectively prevent the temperature of the unit modules adjacent to the refrigerant inlet 210 to rise.

Those skilled in the art to which the present invention pertains will be able to perform various applications and modifications within the scope of the present invention based on the above contents.

Claims (22)

(a) a battery module arrangement in which two or more battery cells are arranged in an upright or inverted form in which battery modules themselves or two or more battery cells are built, in which two or more battery modules are arranged in a lateral direction;
(b) a pair of side support members (front support member and rear support member) for supporting the front and rear surfaces of the battery module assembly in close contact with the outermost battery module of the battery module assembly;
(c) two pairs of lower support members coupled to the lower ends of the side support members to support the lower ends of the battery modules;
(d) two or more first upper mounting members having an upper end of the side support members coupled thereto, an upper end of the battery modules coupled thereto, and having one or both ends coupled to an external device;
(e) a second upper mounting member coupled to the upper ends of the first upper mounting members in a structure perpendicularly intersecting with the first upper mounting members, the both upper ends of which are fastened to an external device;
(f) a front mounting member located on the front surface of the battery module assembly and coupled to the lower ends of the first upper mounting members, the front mounting member having a structure in which both ends are fastened to an external device; And
(g) a lower plate positioned below the lower support members to provide a space used as a discharge passage of the refrigerant;
A battery pack comprising a. The battery pack as claimed in claim 1, wherein the lower plate is made of an injection molded product. The battery pack as claimed in claim 2, wherein the injection-molded product is made of a polymer resin. The battery pack as claimed in claim 1, wherein the lower plate has a structure in which an outer circumferential portion adjacent to a lower support member is bent upward. The battery pack according to claim 4, wherein at least one support protrusion protruding downward in a relatively longer length than the bottom surface of the main body of the lower plate is formed at an outer circumferential portion of the lower plate. The battery pack as claimed in claim 5, wherein the support protrusion has a hollow or circular hollow structure in a horizontal cross section. The battery pack according to claim 5, wherein an upward protrusion is formed at an upper end of the outer circumferential portion corresponding to the support protrusion on the outer circumferential portion of the lower plate to be in contact with the lower support member. 6. The battery pack according to claim 5, wherein at least two support protrusions are formed at outer peripheral portions of both sides of the lower plate. The battery pack according to claim 5, wherein the support protrusion is integrally formed by the lower plate and the injection molding. The battery pack as claimed in claim 5, wherein the lower end of the support protrusion is in contact with a panel of the vehicle. The method of claim 1,
The battery modules are built in each pack case,
In the pack case, the refrigerant inlet and the refrigerant outlet are opposite to each other so that the refrigerant for cooling the battery cells may flow from one side of the battery module to the opposite side in a direction perpendicular to the stacking direction of the battery cell or the unit module. Located above and below
The coolant inlet, which is a flow space from the coolant inlet to the battery module, and the coolant outlet, which is a flow space from the battery module to the coolant outlet, are formed at the top and bottom of the pack case, respectively.
The battery pack, characterized in that the refrigerant discharge duct communicated with the refrigerant outlet extends upward from the refrigerant outlet along the side of the battery module array. 12. The battery pack as claimed in claim 11, wherein the lower plate has one end coupled to a side support member, and the other end coupled to one bottom surface of the refrigerant discharge duct. 12. The method of claim 11, wherein the suction fan that provides a driving force for moving the refrigerant from the refrigerant inlet to the refrigerant outlet after passing through the battery module, the impact on the battery module assembly when an external force is applied from the side direction of the battery pack To minimize the battery pack, characterized in that mounted on a position higher than the top of the battery module array. The battery according to claim 1, wherein the first upper mounting members, the second upper mounting members, the lower supporting members, and the front mounting member have an I-beam or a tube in a vertical section. pack. The battery pack according to claim 14, wherein the square tube is a square pipe or a round pipe. The battery pack as claimed in claim 1, wherein an electrical component is further mounted on the upper portions of the first upper mounting members and the second upper mounting members by a frame. The battery pack as claimed in claim 1, wherein the side support member is formed in a planar rectangle. The method of claim 1, wherein the first upper mounting members are composed of two end members respectively coupled to both ends of the battery module assembly and one central member coupled to the center of the battery module assembly. Battery pack to say. The method of claim 1, wherein both ends of the front mounting member are bent upwardly in parallel with the second upper mounting member to facilitate coupling to an external device, and the fastener is formed at the bent portion. Battery pack to say. The method of claim 1, wherein both ends of the second upper mounting member are bent downwardly in parallel with the front mounting member to facilitate coupling to an external device, and the fastener is formed at the bent portion. Battery pack to say. Vehicle comprising a battery pack according to claim 1 as a power source. 22. The vehicle according to claim 21, wherein the vehicle is an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle.

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