KR20120039795A - Battery pack of excellent safety - Google Patents

Abstract

PURPOSE: A battery pack is provided to minimize impact of battery module assembly from a suction fan when an external force is applied from a side direction of the battery pack, thereby improving safety of the battery pack. CONSTITUTION: A battery pack(800) comprises a battery module assembly including battery modules(300) in which battery cells or unit modules are laminated, a coolant inlet and a coolant outlet which are located in upper and lower part of the battery module in opposition direction, a coolant inflow part located on top of the battery module, and a coolant outflow part located in the lower part of the battery module, a coolant outflow duct(530) which is extended upward along the side of the assembly of the battery module from a refrigerant outlet, and a fan(540) which is mounted on a location higher than the upper end of the battery module assembly in order to offer driving force for transferring refrigerant.

Description

Battery Pack with Excellent Safety {Battery Pack of Excellent Safety}

The present invention relates to a battery pack having excellent safety, and more particularly, a battery module assembly including battery modules having a stacked structure in which unit modules are upright or inverted; A coolant inlet and a coolant outlet located at upper and lower portions of the battery module in opposite directions; A coolant inlet located at an upper portion of the battery module and being a flow space from the coolant inlet to the battery module, and a coolant discharge portion located at a lower portion of the battery module and flowing from the battery module to the coolant outlet; A refrigerant discharge duct extending upward from the refrigerant outlet along the side of the assembly of the battery module; And a suction fan mounted at a position higher than an upper end of the battery module assembly so as to minimize an impact on the battery module assembly when an external force is applied from a side direction of the battery pack.

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. .

Small or mobile devices use one or two or four battery cells per device, whereas medium and large devices such as automobiles are used in medium and large battery packs electrically connected to a plurality of battery cells due to the necessity of high output capacity.

Since medium and large battery packs are preferably manufactured in small sizes and weights, square batteries, pouch-type batteries, etc., which can be charged with high integration and have a small weight to capacity, are mainly used as battery cells of medium and large battery packs. 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 medium-large battery pack to provide the output and capacity required by 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 vehicle battery pack that is a high output large capacity battery requires a cooling system for cooling the battery cells embedded therein.

On the other hand, in the conventional battery pack, a blowing fan or suction fan for providing a flow driving force of the refrigerant between the battery cells is made of a structure located in front or rear of one side of the battery pack. However, this structure has a problem in that an external force is applied to the side of the battery pack when the vehicle collides, so that the blower fan or the suction fan is damaged, and they damage the battery module.

Therefore, there is a need for a battery pack having a structure that can prevent the blower fan or the suction fan from damaging the battery cells including the battery cells by an external force when an external force such as a rear collision of the vehicle is applied.

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, it is an object of the present invention to provide a battery pack structure that ensures the safety of the battery pack by minimizing the impact on the battery module assembly when an external force is applied from the side direction of the battery pack.

Another object of the present invention is to provide a compact battery pack structure excellent in structural stability by taking a structure for supporting the battery module assembly by a specific member.

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

Battery pack according to the present invention for achieving this object,

A battery module assembly including battery modules themselves or battery modules having a structure in which two or more battery cells are built up and stacked in an upright or inverted form;

Refrigerant inlets and refrigerants located at the top and bottom of the battery module in opposite directions so that the refrigerant for cooling the battery cells can 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 unit module. outlet;

A coolant inlet located at an upper portion of the battery module and being a flow space from the coolant inlet to the battery module, and a coolant discharge portion located at a lower portion of the battery module and flowing from the battery module to the coolant outlet;

A refrigerant discharge duct extending upward from the refrigerant outlet along the side of the assembly of the battery module; And

It provides a driving force to move the refrigerant to the refrigerant outlet after passing through the battery module from the refrigerant inlet, and when the external force is applied from the side of the battery pack to minimize the impact on the battery module assembly than the top of the battery module assembly A suction fan mounted at a high position;

It is configured to include.

Therefore, in the battery pack according to the present invention, since the suction fan is mounted at a position higher than the upper end of the battery module assembly, the suction fan may minimize the impact on the battery module assembly when an external force is applied from the side direction of the battery pack. have.

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

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 that exhibits barrier properties against moisture, air, and the like; And a laminate sheet structure in which an inner sealant layer made of a polymer resin that can be heat-sealed is sequentially stacked.

In one preferred embodiment, the battery module assembly has a battery module array structure in which the battery modules are arranged in a number of two or more rows in the lateral direction, compared to the conventional battery pack structure consisting of one battery module, high output capacity Can provide a capacitance of.

In the above structure, the refrigerant discharge duct and the suction fan are formed for each of the battery modules, and the refrigerant introduced through the refrigerant inlet passes through the refrigerant inlet, the battery module, the refrigerant outlet, the refrigerant outlet, and the refrigerant discharge duct. Through the process of being discharged to the outside it is possible to effectively cool each of the battery modules.

In another preferred embodiment, the battery module assembly,

(a) a battery module arrangement in which battery modules are arranged in two or more rows in the lateral direction;

(b) a pair of side support members each supporting both sides 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 upright battery modules coupled thereto, and configured to have 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; And

(f) a side mounting member positioned on one side of the battery module assembly and coupled to the lower ends of the first upper mounting members and configured to have both ends coupled to an external device;

It may be configured to include a structure.

Therefore, since both side ends of the side mounting member and the second upper mounting member and one side or both ends of the first upper mounting member are fastened to the external device, the battery pack can be easily and stably mounted to the external device. Can be.

In addition, 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 to prevent vertical vibration. The structural reliability of the entire battery pack can be sufficiently secured.

For reference, in the present specification, the directions are 'before', 'after', 'left' and 'right' based on a state of seeing the battery module array from one side (C of FIG. 1) of the battery module array. , And set it to 'up', 'down'.

The first upper mounting members, the second upper mounting members, the lower support members, and the side mounting members 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 the above structure, the electrical component may be additionally mounted on the first upper mounting members and the second upper mounting member, and the electronic member may be maintained and used under optimum conditions by monitoring the state of the battery, for example. Battery Management System (BMS), which automatically manages the battery system, predicts when the battery needs to be replaced and proactively detects the battery in question, and PRA (Power Relay Assembly), a device that blocks and connects high voltage flow. ) And the like.

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 assembly, for example, may be formed in a planar rectangle.

One side end of the lower support member is coupled to the side support member, and the other end is further equipped with a lower plate coupled to one bottom surface of the refrigerant discharge duct, the battery upon application of an external force to the battery pack Double movement of the module arrangement with the lower support members is prevented from moving downward, and the space between the lower plate and the lower support member can be used as the refrigerant discharge portion.

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 each coupled to the front and rear ends of the battery module assembly. It is composed of one central member coupled to the center of the battery module assembly, it is possible to maintain the mass of the battery module assembly as a whole.

As another example, the first upper mounting members may have a structure in which a right end thereof is fastened to an external device.

Both ends of the side mounting member may be bent upward 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.

Both end portions of the second upper mounting member may be bent downward in parallel with the side mounting member to facilitate coupling to an external device, and may have a structure in which a fastener is formed at the bent portion.

The present invention can also uniformly distribute the flow rate of the refrigerant flowing in the flow path between the battery cells or unit modules, thereby effectively removing the heat accumulated between the battery cells or unit modules, the performance of the battery And it provides a battery pack that can greatly improve the life.

Specifically, in the battery pack, the upper inner surface of the upper portion of the refrigerant inlet facing the upper end of the battery module, in the direction of the refrigerant inlet at the opposite end of the refrigerant inlet, a positive angle (A) with respect to the upper surface of the battery module The coolant inlet is configured to be inclined at an angle B of a size larger than the angle A of the inclined surface, so that the coolant inlet is positioned according to mounting conditions for an external device. Can be easily ensured to the desired level of cooling efficiency even if is located above the pack case.

Here, 'an inclined surface inclined at a positive angle (A)' means that the upper inner surface of the coolant inlet located at the coolant inlet is higher than the upper inner surface of the coolant inlet located at the opposite end of the coolant inlet. .

As one preferred example, the inclination angle A of the inclined surface may be 3 to 5 degrees. According to the experiments performed by the inventors of the present application, it was surprisingly found that when the inclination angle A of the inclined surface has the above range, the temperature deviation between the unit modules is further reduced.

As another preferred example, the inclination angle B of the refrigerant inlet may be formed to 20 to 50 degrees. In general, the smaller the inclination angle B of the coolant inlet, the more the coolant introduced into the coolant inlet may move to the flow path located at the opposite end of the coolant inlet. However, according to an experiment conducted by the inventors of the present application, when the inclination angle A of the inclined surface is 3 to 8 degrees, in the structure in which the inclination angle B of the coolant inlet is formed at 20 to 50 degrees, the temperature variation of the coolant is It was confirmed that the decrease. In addition, the width of the refrigerant inlet has been found to have a significant influence on the temperature variation between the unit cells, in addition to the case where the upper inner surface of the upper portion of the refrigerant inlet has a specific inclined structure as described above.

Therefore, when the width of the coolant inlet is formed in a size of 5 to 25% based on the length of the pack case corresponding to the length of the battery module, the temperature variation of the coolant generated according to the mounting conditions of the external device can be more efficiently. It is possible to reduce, more preferably to form a size of 10 to 20%.

Opposite ends of the refrigerant inlet may be formed in a structure spaced apart from the upper surface of the battery module to a height of 10% or less based on the height of the battery module. Such a structure appropriately limits the amount of refrigerant reaching the opposite end of the refrigerant inlet, thereby further improving the uniform distribution effect of the refrigerant to the unit modules.

In this case, the opposite end of the refrigerant inlet may be a structure spaced apart from the top surface of the battery module by about 1 to 10 mm.

In some cases, the coolant inlet may be further installed at the coolant inlet so that the coolant can be easily introduced into the coolant inlet. In such a structure, by the flow driving force of the refrigerant generated by the blowing fan, the refrigerant introduced through the narrow inlet sufficiently reaches the unit cell far from the inlet at a high flow rate, so that the flow rate of the refrigerant is relatively uniform under the same conditions. The distribution effect is exerted.

The present invention also provides an electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle that uses the battery pack as a power source and 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 in which the battery pack is mounted between the trunk bottom of the vehicle or the rear seat and the trunk of the 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 suction fan is mounted at a position higher than the top of the battery module assembly, the impact of the suction fan on the battery module assembly is minimized when an external force is applied from the side direction of the battery pack. It is possible to improve the safety of the battery pack.

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 side 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 is a perspective view of a battery pack according to an embodiment of the present invention;
FIG. 2 is a schematic vertical cross-sectional view showing a structure in which the battery module of FIG. 1 is mounted in a pack case; FIG.
3 is a vertical cross-sectional view illustrating a structure in which the opposite end of the refrigerant inlet port is spaced apart from the top surface of the battery cell stack in the structure of FIG. 2.

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 is a perspective view of a battery pack according to an embodiment of the present invention, Figure 2 is a schematic vertical cross-sectional view showing a structure in which the battery module of Figure 1 mounted on the pack case.

First, referring to FIG. 1 along with FIG. 2, the battery pack 800 includes a battery module assembly, a pair of refrigerant inlets 310 and a refrigerant outlet 320, a pair of refrigerant inlets 340, and a refrigerant outlet ( 350, and a pair of refrigerant 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 300 to the opposite side in a direction perpendicular to the stacking direction of the unit modules 430. Located in the upper and lower portions of the battery module 300 in the opposite direction.

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

The refrigerant discharge duct 530 extends upward from the refrigerant outlet 320 along the side of the battery module assembly, and moves to the refrigerant outlet 320 after the refrigerant passes through the battery module 300 from the refrigerant inlet 340. Suction fan 540 is provided at a position higher than the top of the battery module assembly to provide a driving force for the impact, the impact of the suction fan 540 against the battery module assembly when an external force is applied from the side direction (D) of the battery pack Minimize. In addition, the side direction D of the battery pack 800 is a position corresponding to the rear of the vehicle.

In addition, the directions in the present specification, based on the state of seeing the battery module assembly 300b from one side (C) of the battery module assembly 300b, 'before', 'after', 'left', ' It is expressed by setting 'right', 'up', 'down' and so on.

The battery module assembly is a battery module array 300b in which two battery cells in which unit modules 330 are built in an upright form are stacked, and battery modules 300 and 300a having a stacked structure are arranged in two rows in a lateral direction. And a pair of refrigerant discharge ducts 530 and suction fans 540 are formed for each of the battery modules 300 and 300a.

Specifically, the battery module assembly includes a battery module assembly 300b, a pair of side support members 570 and 580, two pairs of lower support members (not shown), and three first upper mounting members. 502, 504, 506, a second upper mounting member 510, and a side mounting member 520.

The side support members 570 and 580 support the left and right sides of the battery module assembly 300b while being in close contact with the outermost battery module of the battery module assembly 300b. (Not shown) are coupled to the lower ends of the side support members 570 and 580.

The first upper mounting members 502, 504, 506 are coupled to an upper end of the side support members 570 and 580 and an upper end of the battery modules 300 and 300a, and the right end thereof is an external device (not shown). It consists of a structure that is fastened to.

The second upper mounting member 510 is coupled to the upper end of the first upper mounting members 502, 504, 506 in a structure perpendicularly intersecting with the first upper mounting members 502, 504, 506. It has a structure in which the end is fastened to the external device.

The side mounting member 520 is located on the left side of the battery module assembly 300b and is coupled to the lower end of the first upper mounting members 502, 504, 506, and has both ends coupled to an external device. consist of.

In addition, the first upper mounting members 502, 504, 506, the second upper mounting member 510, the lower supporting members (not shown), and the side mounting member 520 have a rectangular pipe shape in a vertical section. It consists of a square tube, and the BMS 550 and the PRA 560 are mounted on the first upper mounting members 502, 504, 506 and the second upper mounting member 510 by frames.

The side support members 570 and 580 are formed in a planar rectangle, and a lower plate having one end coupled to the right side support member 580 and the other end coupled to the bottom surface of the refrigerant discharge duct 530. (Not shown) is mounted to the bottom of the lower support member (not shown).

The first upper mounting members 502, 504, 506 are the centers of the two end members 502, 504 and the battery module assembly 300b, which are respectively coupled to the front and rear ends of the battery module assembly 300b. It consists of one central member 506 coupled to, and has a structure in which the right end is fastened to an external device.

In addition, both end portions of the side mounting member 520 are bent upwardly in parallel with the second upper mounting member 510, and the 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 side mounting member 520, and a fastener 512 is formed at the bent portion to facilitate coupling to an external device. .

Next, referring to FIG. 2, in the pack case 370, the length corresponding to the stacking direction L of the unit modules 330 is relatively longer than the length corresponding to the width direction W of the unit modules 330. It is formed long. In addition, in the direction perpendicular to the stacking direction L of the unit modules 330, the refrigerant inlet 310 and the refrigerant outlet 320 are opposite to each other so that the refrigerant may flow from one side of the battery module 332 to the opposite side. In the upper and lower portions of the pack case 370, respectively.

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.

In addition, in the pack case 370 of FIG. 2, 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 of the unit modules located at a 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.

3 is a vertical cross-sectional schematic diagram showing a structure in which the opposite end of the refrigerant inlet is spaced apart from the top surface of the battery cell stack in the structure of FIG. 2.

Referring to FIG. 3, the opposite ends of the refrigerant inlets 410 are spaced apart from the top surface of the unit module stack 432 by a height h of approximately 1 mm, so that the inclination angle B and the slope of the refrigerant inlets are Since only a limited amount of the refrigerant passing through the inclination angle A reaches the opposite end of the refrigerant inlet 410, the unit modules 430 adjacent to the opposite end may be prevented from being overcooled.

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 (20)

A battery module assembly including battery modules themselves or battery modules having a structure in which two or more battery cells are built up and stacked in an upright or inverted form;
Refrigerant inlets and refrigerants located at the top and bottom of the battery module in opposite directions so that the refrigerant for cooling the battery cells can 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 unit module. outlet;
A coolant inlet located at an upper portion of the battery module and being a flow space from the coolant inlet to the battery module;
A refrigerant discharge duct extending upward from the refrigerant outlet along the side of the assembly of the battery module; And
It provides a driving force to move the refrigerant to the refrigerant outlet after passing through the battery module from the refrigerant inlet, and when the external force is applied from the side of the battery pack to minimize the impact on the battery module assembly than the top of the battery module assembly A suction fan mounted at a high position;
A battery pack comprising a. The battery pack assembly according to claim 1, wherein the battery module assembly has a battery module arrangement structure in which battery modules are arranged in two or more rows in a lateral direction. The battery pack as claimed in claim 2, wherein a refrigerant discharge duct and a suction fan are formed for each battery module, respectively. The method of claim 1, wherein the battery module assembly,
(a) a battery module arrangement in which battery modules are arranged in two or more rows in the lateral direction;
(b) a pair of side support members supporting both sides 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 upright battery modules coupled thereto, and configured to have 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; And
(f) a side mounting member positioned on one side of the battery module assembly and coupled to the lower ends of the first upper mounting members and configured to have both ends coupled to an external device;
A battery pack comprising a. The battery according to claim 4, wherein the first upper mounting members, the second upper mounting members, the lower supporting members, and the side mounting members have an I-beam or a tube in a vertical cross section. pack. The battery pack according to claim 5, wherein the square tube is a square pipe or a round pipe. The battery pack as claimed in claim 4, wherein an electrical component is further mounted on the first upper mounting members and the second upper mounting member. The battery pack as claimed in claim 4, wherein the side support member is formed in a planar rectangle. The lower end of the lower support member, the one end is coupled to the side support member, the other end is further mounted to the lower plate is coupled to one lower end surface of the refrigerant discharge duct. Battery pack. The method of claim 4, wherein the first upper mounting members are composed of two end members respectively coupled to the front and rear ends of the battery module assembly and one central member coupled to the center of the battery module assembly. A battery pack characterized by the above. The battery pack according to claim 4, wherein the first upper mounting members have a structure in which a right end thereof is fastened to an external device. The method of claim 4, wherein both ends of the side mounting member are bent upwardly in parallel with the second upper mounting member to facilitate coupling to an external device, and a fastener is formed at the bent portion. Battery pack to say. The method of claim 4, wherein both ends of the second upper mounting member are bent downwardly in parallel with the side mounting member to facilitate coupling to an external device, and the fastener is formed at the bent portion. Battery pack to say. The upper end inner surface of the coolant inlet facing the upper end of the battery module is inclined toward the coolant inlet at an opposite end of the coolant inlet at a positive angle A with respect to the top surface of the battery module. The inclined surface structure, wherein the refrigerant inlet is inclined at an angle (B) of a size larger than the angle (A) of the inclined surface. The battery pack according to claim 14, wherein the inclination angle A of the inclined surface is 3 to 5 degrees. 15. The method of claim 14, wherein the inclination angle (B) of the refrigerant inlet is a battery pack, characterized in that 20 to 50 degrees. The battery pack as claimed in claim 1, wherein the opposite end of the refrigerant inlet is spaced apart from an upper surface of the battery module at a height of 10% or less based on the height of the battery module. The battery pack as claimed in claim 1, wherein a blower fan is additionally installed at the coolant inlet to easily introduce the coolant to the coolant inlet. An electric vehicle, a hybrid electric vehicle, or a plug-in hybrid electric vehicle using the battery pack according to claim 1 as a power source. 20. The electric vehicle, the hybrid electric vehicle, or the plug-in hybrid electric vehicle according to claim 19, wherein the battery pack is mounted between a trunk bottom of the vehicle or between the rear seat and the trunk of the vehicle.

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