KR20180045373A - Battery Pack with means for cooling heat element - Google Patents

Abstract

A battery pack according to an aspect of the present invention comprises: a battery module assembly having a cooling channel through which refrigerant flows in a pack case; a pack end plate disposed on one side of the battery module assembly to support the battery module assembly; an exothermic electrical component embedded with a heat generating component and disposed adjacent to the battery module assembly with the pack end plate interposed therebetween; a cooling channel connector communicating with the cooling channel and mounted in inward and outward directions in the pack case; and a heat transfer bracket made of a thermal-conductive material and having one side coupled to the cooling channel connector and the other side coupled to the exothermic electrical component. The battery pack of the present invention can prevent a temperature rise of the battery module adjacent to the exothermic electric component.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack, and more particularly, to a battery pack having cooling means for properly maintaining the temperature of heat generating components inside the battery pack.

2. Description of the Related Art In recent years, secondary batteries have been widely used not only in small-sized devices such as portable electronic devices, but also in electric vehicles that require driving power by using internal combustion engines and / or electric motors. The electric vehicle includes a hybrid electric vehicle, a plug-in hybrid electric vehicle, a pure electric car driven only by an electric motor and a battery without an internal combustion engine, and the like.

In the case of an electric vehicle, a large number of secondary batteries are electrically connected to increase capacity and output. Particularly, pouch-type secondary batteries are widely used because they are easy to be stacked in a middle- or large-sized apparatus.

Types of secondary batteries widely used today include lithium ion batteries, lithium polymer batteries, nickel cadmium batteries, nickel metal hydride batteries, and nickel-zinc batteries. The operating voltage of such a unitary secondary battery cell, that is, the unit battery cell is about 2.5V to 4.2V. Therefore, when a higher output voltage is required, a plurality of battery cells may be connected in series to form a battery pack. In addition, a plurality of battery cells may be connected in parallel according to a charge / discharge capacity required for the battery pack to form a battery pack. Therefore, the number of battery cells included in the battery pack can be variously set according to the required output voltage or the charge / discharge capacity.

Meanwhile, when a plurality of battery cells are connected in series / parallel to form a battery pack, a battery module including at least one battery cell is first configured, and other components are added using the at least one battery module, Is generally used.

Such conventional battery packs include a battery pack assembly including a pack case mounted on an automobile such as an electric vehicle and forming an external appearance, at least one battery module provided in the pack case, a BMS Assemblies, relay assemblies for turning on / off the current in the battery pack, and the like.

On the other hand, in the fields of electric vehicles and the like, recent battery packs are required to be slimmer than existing ones due to their space efficiency. To meet this demand, manufacturers have intensively assembled electrical components, such as BMS assemblies and relay assemblies, in close proximity to battery module assemblies. As described above, if the electrical parts are disposed immediately adjacent to the battery module assembly, the volume of the battery pack is reduced, so that the energy density per unit volume of the battery pack is increased and can be realized compactly.

However, some of the electrical parts include a plurality of heating elements. For example, a relay assembly is an electrical component that incorporates a heating element such as a contactor and a diode, which generate a large amount of heat during operation. Such an exothermic electrical component raises the temperature of the immediately adjacent battery cells, thereby causing a temperature variation of the battery module assembly. The temperature rise of the battery cells and the temperature deviation between the cells in the battery module assembly can not be excluded even if the performance of the battery pack is deteriorated, the service life is shortened, and further, if the heat generation continues for a long time, it may lead to an explosion.

Therefore, in the construction of the battery pack, temperature management of the battery modules as well as temperature management of the surrounding heat generating electrical components is a very important issue.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a battery pack having a cooling means for cooling a heating electric component inside a battery pack.

It is to be understood, however, that the technical subject matter of the present invention is not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

According to an aspect of the present invention, there is provided a battery module assembly having a cooling channel through which refrigerant flows inside a pack case; A pack end plate disposed on at least one side of the battery module assembly to support the battery module assembly; An exothermic electric component including a heat generating component and disposed adjacent to the battery module assembly with the pack end plate interposed therebetween; A cooling channel connector communicating with the cooling channel and mounted to the battery pack case; And a heat transfer bracket that is provided in the heat conductive material and has one side coupled to the cooling channel connector and the other side coupled to the exothermic electrical product.

The heat transfer bracket includes: a first heat transfer bracket in surface contact with the heat generating electrical component and coupled to the pack end plate; And a second heat transfer bracket coupled to the first heat transfer bracket and the cooling channel connector.

The first heat transfer bracket may include a horizontal plate coupled to one side of the pack end plate and a vertical plate extending from the horizontal plate and contacting the one side of the heat generating electrical component.

The second heat transfer bracket may include a first connection plate provided to be in surface contact with the vertical plate and a second connection plate bent and extended from the first connection plate to be in surface contact with the cooling channel connector .

Wherein the cooling channel connector comprises: a connector body communicating with the cooling channel and mounted to a hole for a connector formed in the pack case; A port extending from the connector body and passing through the connector hole and exposed to the outside of the battery pack case; And a cooling fin which is formed as a body with the connector body in a plate shape and contacts with the second heat transfer bracket to perform heat exchange.

The cooling fin may have an end portion bent to the body, and the second heat transfer bracket may be formed with a locking groove into which the end of the cooling fin is inserted and hooked.

And the second heat transfer bracket may be provided with a slot in which the cooling pin is forcedly inserted into contact with both surfaces of the cooling fin.

Wherein the cooling channel connector includes an inlet connector communicating with an inlet port of the cooling channel and an outlet connector communicating with an outlet port of the cooling channel and at least one of the inlet connector and the outlet connector is connected to the cooling channel through the heat transfer bracket, Heat exchange with the exothermic electrical component can be performed.

The inlet connector and the outlet connector are disposed in parallel to each other with the exothermic electrical component interposed therebetween, and can exchange heat with the exothermic electrical component.

The pack end plate and the first heat transfer bracket are welded to each other, and the heat transfer electrical component can be bolted to the first heat transfer bracket.

The second heat transfer bracket may be made of copper (CU) or aluminum (Al).

According to another aspect of the present invention, an automobile including the above-described battery pack can be provided. The automobile may include an electric vehicle or a hybrid vehicle.

According to an aspect of the present invention, it is possible to effectively cool the exothermic electric component adjacent to the battery module, thereby preventing the temperature rise of the battery pack, particularly the exothermic electric component and the battery module adjacent to the battery module, can do.

According to another aspect of the present invention, since the exothermic electrical components can be cooled together by using the cooling means for temperature management of the battery module, a large number of separate components for cooling the exothermic electrical components are not required, The economic efficiency and efficiency of the system can be promoted.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further the understanding of the technical idea of the invention, And should not be construed as limiting.
1 is a perspective view of a battery pack according to an embodiment of the present invention.
FIG. 2 is a perspective view of the pack cover shown in FIG. 1; FIG.
3 is an exploded perspective view of a cooling channel connector and a battery module assembly according to an embodiment of the present invention.
FIG. 4 is a perspective view of FIG. 3. FIG.
FIG. 5 is a perspective view illustrating a heat generating electrical component and a battery module disposed with a pack end plate interposed therebetween according to an embodiment of the present invention. FIG.
Figure 6 is a side view of the main part of Figure 5;
FIG. 7 is a perspective view schematically showing a cooling structure of a heat-generating electrical product according to an embodiment of the present invention.
8 and 9 are schematic perspective views showing the cooling pin and the second connection plate before and after the coupling according to an embodiment of the present invention.
10 is a schematic perspective view showing a modification of the embodiment of FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings, and the inventor should appropriately interpret the concept of the term appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

The embodiments of the present invention are provided to explain the present invention more fully to the ordinary artisan, so that the shape and size of the components in the drawings may be exaggerated, omitted or schematically shown for clarity. Thus, the size or ratio of each component does not entirely reflect the actual size or ratio.

The battery pack 10 of the present invention to be described below can be provided in an automobile as an energy source of an automobile. For example, the battery pack 10 may be an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, or the like. In addition, the battery pack 10 may be provided in other devices such as an energy storage system using a battery cell as a secondary battery as well as the automobile.

FIG. 1 is a perspective view of a battery pack according to an embodiment of the present invention, FIG. 2 is a perspective view of the battery pack shown in FIG. 1, and FIG. 3 is a perspective view of a cooling channel connector and a plurality of battery module assemblies according to an embodiment of the present invention. FIG. 4 is a partially separated perspective view of FIG. 3. FIG.

As shown in these drawings, the battery pack 10 of the present invention includes a pack case 100, a plurality of battery module assemblies 200, a pack end plate 300, and a heat generating electrical component 400 , Heat transfer bracket (500), and cooling channel connector (600).

The pack case 100 forms the appearance of the battery pack 10 and can be mounted on the electric vehicle. The pack case 100 may include a case cover 110 and a case tray 120.

The case cover 110 may be interconnected with the case tray 120 to package components such as the battery module assembly 200, the pack end plate 300, and various other electrical components.

The case tray 120 supports components such as a battery module assembly 200, a pack end plate 300, and various other electrical parts, and can be mounted on a vehicle body of an electric vehicle or the like.

2, the battery module assembly 200 may include a plurality of battery modules 210 and cooling channels 220 accommodated in the pack case 100 and electrically connected to each other . The plurality of battery modules 210 are arranged in a line along the front-rear direction (X-axis direction) of the pack case 100, and can be fixedly mounted on the case tray 120.

3 and 4, the battery module 210 includes a cartridge 211 for stacking a plurality of secondary batteries and a plurality of secondary batteries, a module end plate 215 disposed at the outermost portion of the battery module 210, And a battery management device 216 for controlling the charging and discharging operations of the secondary batteries in the battery module 210.

Although not shown in the drawings for the sake of convenience, the plurality of secondary batteries may be a pouch type secondary battery. The battery module 210 may be substantially a collection of these secondary batteries. Since the pouch type secondary battery is insufficient in mechanical rigidity, the cartridge 211 is used to prevent the secondary battery from holding and flowing.

3, the cartridge 211 of the present embodiment is constituted by a stacking frame 212 in the form of a rectangular ring, a cooling plate 213 mounted thereon, and a cooling tube 213 surrounding the periphery of the cooling plate 213 214 < / RTI >

The thickness and structure of the cooling plate 213 are not particularly limited as long as it is a thin-shaped member having thermal conductivity. For example, a sheet-shaped metal plate material can be preferably used. The metal material may be aluminum or aluminum alloy having a high thermal conductivity and light weight among metals.

In addition, a cooling tube 214 may be mounted on the rim of the cooling plate 213. The heat generated in the secondary battery is conducted to the cooling plate, and the heat of the cooling plate 213 can be absorbed by the cooling water flowing in the cooling tube 214 because the secondary battery is seated on the cooling plate. At this time, cooling water flowing in the cooling tube 214 is supplied from the cooling channel 220. Here, the cooling channel 220 is a channel provided so that the cooling water can circulate inside the pack case 100.

As shown in Figure 4, the cooling channel 220 is disposed below the battery module assembly 200, and the cooling tubes are configured to be directly perpendicular to this cooling channel. The cooling water flowing outside the battery pack 10 flows along the cooling channel 220 and can be branched to the cooling tubes 214 in the cartridges 211. [

The cooling channel 220 according to the embodiment of the present invention may be constructed by interconnecting pipe-shaped tubular bodies 220a integrally formed in the frame 212 for lamination. For example, as shown in FIGS. 3 and 4, a tubular body 220a may be provided in the lower end corner region of the stacking frame 212. [0041] FIG. When the stacking frames 212 are laminated or assembled together, the cooling channels 220 can be formed by connecting the tubular members 220a to each other. The cooling channel 220 may communicate with the cooling channel connector 600.

The cooling channel connector 600 may be disposed on the front side of the pack case 100 in such a manner that the cooling channel connector 600 is fixed to the pack case 100 and connected to a cooling water supply device (not shown) outside the battery pack 10.

The cooling channel connector 600 according to the present embodiment may include a connector body 611, 621, ports 612, 622, and a cooling pin 623.

The connector bodies 611 and 621 communicate with the cooling channels 220 and can be mounted in the connector holes formed in the front surface of the pack case 100. Specifically, the connector body 611, 621 can be fixedly mounted to the pack case 100 by fastening the flange located at the rear side of the front end portion to the inner wall of the pack case 100 in a state where the front end portion is inserted into the connector hole.

The shape of the front end portion and the hole for the connector (see FIG. 1) may be a hexagonal shape in order to improve the fixing force. These connector bodies 611 and 621 may be connected to the cooling channel 220 directly in the pack case 100 or may be connected to the cooling channel 220 via an extension hose or pipe.

The ports 612 and 622 may extend from the connector bodies 611 and 621 and may be exposed to the outside of the pack case 100 through the connector holes. These ports 612 and 622 may be connected to the cooling water supply device outside the battery pack 10.

The cooling pins 623 are formed as a body with the connector bodies 611 and 621 in the form of a plate of a thermally conductive material and are in contact with the second heat transfer bracket 520 to be described later to perform heat exchange with the second heat transfer bracket 520 . A more detailed description of the cooling pin 623 will be given later.

Two cooling channel connectors 600 may be provided, and the two cooling channel connectors 600 may include an inlet connector 610 for introducing cooling water from the outside and an outlet connector 620 for discharging cooling water to the outside . The inlet connector 610 may communicate with the inlet of the cooling channel 220 within the pack case 100 and the outlet connector 620 may communicate with the outlet of the cooling channel 220. Here, the inlet and outlet of the cooling channel 220 correspond to the tubular body 220a located closest to the front portion of the pack case 100.

FIG. 5 is a perspective view illustrating a heat generating electrical component and a battery module disposed with a pack end plate interposed therebetween according to an embodiment of the present invention. FIG.

Referring to FIG. 5 together with FIG. 2, a pack end plate 300 may be provided on both outer sides of the battery module assembly 200 according to the present embodiment. The pack end plate 300 may be provided in the form of a plate having an approximately large area and may cover both outer sides of the battery module assembly 200. The pack end plate 300 may serve to protect the battery module assembly 200 from external impacts on both outer sides of the battery module assembly 200. Therefore, the pack end plate 300 can be made of a metal such as steel to ensure rigidity.

Meanwhile, the heating electric component 400 may be disposed at a position immediately adjacent to the battery module assembly 200 with the pack end plate 300 interposed therebetween. The exothermic electric component 400 may have a built-in heat generating component inside the electric field box. For example, the heating electric device 400 may be a relay assembly including a heat generating part such as a contactor and a diode. The relay assembly is a control device for selectively interrupting the current in the battery pack 10 in an emergency such as a vehicle collision. Of course, the exothermic electrical component 400 is not necessarily limited to the relay assembly, and may be other electrical components that generate heat in operation of the battery pack 10. When the heating appliance 400 is overheated during operation, the temperature of the battery module 210 may be inevitably increased.

The heat transfer bracket 500 serves to cool the heat generated by the exoergic electrical component 400 and cool it. More precisely, the heat transfer bracket 500 absorbs the heat of the exoergic electrical component 400 and transfers the heat to the cooling channel connector 600. Accordingly, the heat transfer bracket 500 may be made of a material having excellent thermal conductivity such as copper (Cu) or aluminum (Al).

FIG. 6 is a side view of a main portion of FIG. 5, and FIG. 7 is a perspective view schematically illustrating a cooling structure of a heat-generating electrical product according to an embodiment of the present invention.

As shown in these drawings, the heat transfer bracket 500 may be configured such that one side is coupled to the cooling channel connector 600 and the other side is coupled to the exothermic electrical product 400. The heat transfer bracket 500 may include a first heat transfer bracket 510 coupled to the exothermic electrical component 400 and the pack end plate 300 and a second heat transfer bracket 510 coupled to the first heat transfer bracket 510 and the cooling channel connector 600 coupled to the second heat transfer bracket 520.

The first heat transfer bracket 510 includes a horizontal plate 511 fixed to one side of the pack end plate 300 and fixed to one side of the heat generating electrical component 400, And may include a vertical plate 512 coupled thereto.

The horizontal plate 511 may be welded to the pack end plate 300 and the exothermic electrical component 400 may be bolted to the vertical plate 512 and fixedly mounted to the vertical plate 512.

In particular, at least one surface of the exoergic electrical component 400 is in surface contact with one side of the vertical plate 512. Therefore, the heat generated in the exoergic electrical product 400 can be dissipated to the first heat transfer bracket 510. At this time, a thermal interface material such as thermal grease may be further interposed between the exothermic electrical component 400 and the vertical plate 512.

For reference, the electrical component is a component that may require maintenance and repair, and thus the exothermic electrical component 400 is bolted to the vertical plate 512, but the scope of the present invention is not limited to these. For example, the exothermic electrical component 400 may be welded or bonded to the first heat transfer bracket 510.

The second heat transfer bracket 520 includes a first connection plate 521 which is fixedly coupled to the vertical plate 512 and a second connection plate 522 which is bent and extended to the first connection plate 521, And a second connecting plate 522 coupled thereto.

The first connection plate 521 is bolted to the vertical plate 512 and is in surface contact with the other surface of the vertical plate 512. And the second connection plate 522 may be provided in a form of being bent at least one time so as to be detached from the peripheral structures and connected to the cooling channel connector 600. [

A part of the second connecting plate 522 extending from the first connecting plate 521 and the cooling pin 623 of the cooling channel connector 600 may be bolted to each other in a state of being in surface contact. At this time, a thermal interface material may be further interposed between the second connection plate 522 and the cooling fin 623.

The heat generated in the exoergic electrical component 400 can be conducted in the direction of the vertical plate 512, the first connection plate 521, the second connection plate 522, and the cooling fin 623.

Since the cooling water flows inside the connector bodies 611 and 621, the cooling pins 623, which form one body with the connector bodies 611 and 621, can always maintain a low temperature while the cooling water circulates. Accordingly, the heat of the exothermic electrical component 400 can be absorbed by the cooling fin 623 through the heat transfer bracket 500. Even if the exothermic electrical component 400 is installed very close to the battery module 210, the temperature of the battery module 210 is not affected by the exothermic electrical component. Further, the heat generated in the battery module 210 itself may be absorbed into the exothermic electric component 400, which is maintained at a relatively low temperature state by the cooling pins 623, so that the battery module 210 may be cooled .

FIG. 8 and FIG. 9 are perspective views showing the cooling pin and the second connection plate before and after the coupling according to the embodiment of the present invention, and FIG. 10 is a perspective view showing a modification of the embodiment of FIG.

8 and 9, the cooling fin 623 has an end portion bent in the shape of a body, and the end portion of the cooling fin 623 is inserted into the engagement groove 522a formed in the second connection plate 522 And can be configured to engage. In this case, the flow can be suppressed in the forward and backward directions, and the ease of fastening and fixability between the cooling fin 623 and the second connection plate 522 can be enhanced.

In addition, as a modification of this embodiment, the cooling pin 623 may be configured to be forcedly engaged with the second connection plate 522. [ For example, according to a modification of the embodiment of FIG. 9 shown in FIG. 10, the cooling pin 623 can be configured to be snugly fitted into the slot 522b formed in the second connection plate 522. FIG. In this case, both surfaces of the cooling fin 623 can be kept in contact with the slots 522b of the second connection plate 522. [ That is, since the contact area between the cooling fin 623 and the second connection plate 522 is larger than that in the embodiment of FIG. 9, the heat transfer efficiency can be further increased. In addition, since the cooling pin 623 is fixedly inserted into the slot 522b and fixed in the slot 522b, the position fixing force of the cooling channel connector 600 can be increased.

It should be understood that the outlet connector 620 of the cooling channel connector 600 is used only as a cooling means for the heating electrical appliance 400 in this specification, but the inlet connector 610 may also be used. In other words, according to the present invention, any one of the inlet connector 610 and the outlet connector 620 can be configured to perform heat exchange with the exoergic electrical product 400 via the heat transfer bracket 500. For example, the inlet connector 610 and the outlet connector 620 are disposed side by side with the exoergic electrical product 400 interposed therebetween (see FIGS. 3 to 5). The inlet connector 610 is also provided with a cooling pin 623 such as the outlet connector 620 and the heat transfer bracket 500 connected to the cooling pin 623 is connected to the other side of the heating electric component 400 5 on the opposite side of the mounting surface of the heat transfer bracket 500). In this case, both the inlet connector 610 and the outlet connector 620 are used as the cooling means of the exoergic electrical product 400, so that the cooling performance can be further improved.

The battery pack 10 according to the present invention can be applied to an automobile such as an electric car or a hybrid car. That is, the automobile according to the present invention may include the battery pack 10 according to the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but many variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

On the other hand, in the present specification. It is to be understood that the terminology such as up, down, left, right, etc., is used for convenience of explanation, but can be expressed differently depending on the viewing position of the observer or the position of the object. It is obvious to you.

10: Battery pack 100: Pack case
110: case cover 120: case tray
200: battery module assembly 210: battery module
211: Cartridge 212: Frame for lamination
213: cooling plate 214: cooling tube
220: cooling channel 300: pack end plate
400: Exothermic electric component 500: Heat transfer bracket
510: first heat transfer bracket 511: horizontal plate
512: vertical plate 520: second heat transfer bracket
521: first connecting plate 522: second connecting plate
522a: Retaining groove 600: Cooling channel connector
610: Inlet connector 620: Outlet connector
611, 621: connector body 612, 622:
623: Cooling pin

Claims (12)

A battery module assembly having a cooling channel through which refrigerant flows within the pack case;
A pack end plate disposed on at least one side of the battery module assembly to support the battery module assembly;
An exothermic electric component including a heat generating component and disposed adjacent to the battery module assembly with the pack end plate interposed therebetween;
A cooling channel connector communicating with the cooling channel and mounted to the battery pack case; And
Wherein the heat conductive bracket is made of a thermally conductive material and has one side coupled to the cooling channel connector and the other side coupled to the exothermic electrical component. The method according to claim 1,
The heat-
A first heat transfer bracket in surface contact with the heat generating electrical component and coupled to the pack end plate; And
And a second heat transfer bracket coupled to the first heat transfer bracket and the cooling channel connector. 3. The method of claim 2,
Wherein the first heat transfer bracket includes a horizontal plate coupled to one side of the pack end plate and a vertical plate extending from the horizontal plate to face one side of the heat generating electrical component, pack. The method of claim 3,
The second heat transfer bracket may include a first connection plate provided to be in surface contact with the vertical plate and a second connection plate extending from the first connection plate to be in surface contact with the cooling channel connector, And a battery pack. 3. The method of claim 2,
The cooling channel connector includes:
A connector body communicating with the cooling channel and mounted in a hole for a connector formed in the pack case;
A port extending from the connector body and passing through the connector hole and exposed to the outside of the battery pack case; And
And a cooling fin which is formed as a body with the connector body in a plate shape and contacts the second heat transfer bracket to perform heat exchange. 6. The method of claim 5,
Wherein the cooling fin includes an end portion bent in a shape to the body, and the second heat transfer bracket is formed with an engagement groove in which an end of the cooling fin is inserted and hooked. 6. The method of claim 5,
And the second heat transfer bracket is formed with a slot in which the cooling pin is forcedly inserted into contact with both surfaces of the cooling fin. The method according to claim 1,
The cooling channel connector including an inlet connector communicating with an inlet of the cooling channel and an outlet connector communicating with an outlet of the cooling channel,
Wherein at least one of the inlet connector and the outlet connector exchanges heat with the exothermic electrical component via the heat transfer bracket. 9. The method of claim 8,
Wherein the inlet connector and the outlet connector are disposed in parallel with each other with the exothermic electrical component interposed therebetween to perform heat exchange with the exothermic electrical component. 3. The method of claim 2,
Wherein the pack end plate and the first heat transfer bracket are welded to each other, and the heat generating electrical component is bolted to the first heat transfer bracket. 3. The method of claim 2,
Wherein the second heat transfer bracket is made of copper (CU) or aluminum (Al). An electric vehicle comprising the battery pack according to any one of claims 1 to 11.

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