Cooling structure of battery pack, including heat pipe

Abstract

The present invention provides a structure of a battery pack, comprising: a plurality of battery modules arranged in the width direction; a pack frame provided with side walls and a bottom plate and having the battery modules received therein; a heat pipe connected to the bottom surface of the battery modules and extending in the length direction; and a cooling flow path connected to one lengthwise end portion of the heat pipe and comprising a flow path portion through which a refrigerant circulates, an inlet through which the refrigerant is introduced, and an outlet through which the refrigerant is discharged.

Description

Cooling structure of a battery pack including a heat pipe

[0001] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2023-0164674, dated November 23, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a cooling structure including a heat pipe, which is applied to a battery pack in which a plurality of battery modules are built.

[0003] Secondary batteries, which boast high electrical properties such as high energy density and easy applicability across a wide range of product groups, are widely used not only in portable devices but also in electric or hybrid vehicles powered by electrical power sources, as well as in power storage devices. These batteries are attracting attention as a new energy source for environmental friendliness and energy efficiency, not only because they can dramatically reduce fossil fuel use, but also because they produce no byproducts from energy use.

[0004] While small mobile devices typically use one or two or three battery cells per device, medium- to large-sized devices, such as automobiles, require high output and large capacity. Therefore, medium- to large-sized battery modules, which electrically connect multiple battery cells, are used. Furthermore, these battery modules can be integrated into battery packs to achieve even higher output and capacity.

[0005] Meanwhile, battery modules can generate heat as the battery cells charge and discharge. Accordingly, battery packs typically incorporate a cooling structure to dissipate this heat.

[0006] A widely used cooling structure is one in which a heat sink with high thermal conductivity is placed on the bottom plate of the battery pack, and the heat sink is cooled by air cooling, water cooling, or other methods to cool the battery module. The heat sink can be placed at the bottom of each battery module, and can also be placed at the bottom of the battery pack.

[0007] However, if each battery module has a heat sink, a cooling water pipe must be connected to each heat sink. This requires a complex assembly process, and if the cooling water leaks through the vulnerable joints of the pipes, it can cause a short circuit.

[0008] Additionally, the cooling path of the coolant provided in the heat sink typically has a large cross-sectional area or a long, complex zigzag path to cover the entire bottom surface of the battery module, if possible. This slows the cooling rate and results in varying degrees of cooling across different areas.

[0009] In particular, within a single heat sink, cooling may not occur well the closer the heat sink is to the outlet of the heat sink, and among multiple heat sinks connected in series, cooling may not occur well the closer the heat sink is to the outlet of the cooling path of the entire battery pack.

[0010] The present invention was created under the background of the above-described prior art, and its purpose is to provide a structure of a battery pack with improved cooling efficiency.

[0011] Specifically, the present invention seeks to provide a structure of a battery pack having a cooling structure capable of uniformly cooling each part and each module on a module while having a fast cooling speed.

[0012] Another technical problem of the present invention is to provide a structure of a battery pack that prevents the risk of a short circuit or the like occurring due to refrigerant leaking from a joint portion of a cooling channel through which the refrigerant flows.

[0013] The present invention also seeks to provide a battery pack structure that has an efficient cooling structure while not having an excessively large volume, thereby improving energy density.

[0014] The technical objectives of the present invention are not limited to the purposes mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0015] In order to solve the above problem, the present invention provides a structure of a battery pack including: a plurality of battery modules arranged in the width direction; a pack frame accommodating the battery modules and having side walls and a bottom plate; a heat pipe connected to a bottom surface of the battery module and extending in the length direction; and a cooling channel connected to one end of the heat pipe in the length direction and including a channel portion through which a coolant circulates, an inlet through which the coolant flows in, and an outlet through which the coolant flows out.

[0016] According to the present invention, since the heat pipe and the cooling channel need only be in contact with each other without the need for communication with each other, a structure of a battery pack is provided that can prevent coolant leakage into the pack frame due to damage to a vulnerable joint portion of the cooling channel and a short circuit caused thereby.

[0017] In addition, according to the present invention, since the cooling path is connected to the longitudinal side of the battery module, the bottom of the battery pack does not become excessively thick due to the cooling structure, so that space utilization and energy density can be improved.

[0018] The heat pipe may be extended in one longitudinal direction compared to the battery module. Accordingly, the flow path portion may be in contact with one longitudinal end of the heat pipe not only in the longitudinal direction but also in the height direction, and the heat pipe and the cooling flow path may overlap in the height direction, thereby reducing the area occupied by the cooling structure in a plane and improving space utilization.

[0019] One longitudinal end of the heat pipe may extend toward the side wall. At this time, the flow path may be provided along the inner circumference of the side wall. By providing the flow path in the empty space formed between the battery module and the side wall, space efficiency can be improved.

[0020] Preferably, at least a portion of the above-mentioned flow path can be embedded in the side wall. Accordingly, even when the battery module is positioned very close to the side wall, the flow path can be provided without taking up a large space.

[0021] The above battery modules may be arranged in multiple rows parallel to each other in the longitudinal direction. According to one embodiment of the present invention, the battery modules may be arranged in two rows.

[0022] At this time, a longitudinal end of the heat pipe may extend between each row of the battery module, and the flow path may extend in the width direction between each row of the battery module. By arranging the flow path in the space between each row of the battery module, the flow path may not occupy additional space.

[0023] Preferably, the pack frame may include a partition wall extending in the width direction between each row of the battery modules and dividing a space in which each row of the battery modules is arranged, and at least a portion of the flow path may be embedded in the partition wall. Accordingly, the space in which the battery modules are arranged is divided, while the flow path wall can be provided without taking up additional space.

[0024] Preferably, the heat pipe can be extended to protrude in both longitudinal directions compared to the battery module.

[0025] For example, the battery module may be arranged in a single row, the longitudinal ends of the heat pipe may extend toward the side wall, and the flow path may be arranged along the inner circumference of the side wall. Alternatively, at least a portion of the flow path may be embedded in the side wall.

[0026] According to one embodiment of the present invention, the battery modules may be arranged in a plurality of rows that are juxtaposed in the longitudinal direction, and each longitudinal end of the heat pipe may extend between each row of the battery modules or toward the side wall. At this time, the flow path may extend in the width direction between at least one of the rows of the battery modules and between the battery module and the side wall. Alternatively, at least a portion of the flow path may be embedded in at least one of the partition wall and the side wall.

[0027] The heat pipe may include an extension portion extending in the longitudinal direction and a protrusion extending upward from one or both longitudinal ends thereof. Accordingly, heat absorbed by the heat pipe may be concentrated on the protrusion provided at one longitudinal end thereof, and the cooling efficiency of the heat pipe may be improved by connecting the protrusion to the flow path portion.

[0028] At this time, since only the protrusion connected to the euro portion is exposed to the outside, the extension portion can be embedded in the floor plate at least in part, thereby further reducing the thickness of the bottom of the battery pack.

[0029] It is preferable that the above heat pipes are provided in multiples for each battery module.

[0030] The battery module may include a plurality of battery cells that extend in the longitudinal direction and are arranged in the width direction. Since both the battery module and the heat pipe extend in the longitudinal direction, even if each battery cell constituting the battery module generates heat differently, the heat pipe can quickly and uniformly cool them.

[0031] The above inlet and outlet may protrude and extend to the same outer side of the pack frame. Accordingly, since the joint portion of the cooling channel is entirely provided outside the pack frame, the risk of refrigerant leaking within the pack frame can be reduced.

[0032] The present invention also provides a structure of a vehicle including the battery pack. The battery pack may be installed in the vehicle as a power source. The vehicle may be an electric vehicle or a hybrid vehicle. The vehicle may be a two-wheeled vehicle or a four-wheeled vehicle. However, the structure of the vehicle is not limited to the above, and the battery pack need not necessarily serve as the vehicle's power source.

[0033] The present invention can provide a structure of a battery pack with improved cooling efficiency by including a heat pipe and a cooling channel connected thereto.

[0034] Specifically, the present invention can provide a structure of a battery pack having a cooling structure capable of uniformly cooling each part of a module and each module while having a fast cooling speed, including a heat pipe, in one direction or two directions.

[0035] Another advantage of the present invention is that it is possible to provide a battery pack structure in which the risk of accident due to coolant leakage is prevented by not providing a joint portion of the cooling path within the pack frame.

[0036] The present invention also seeks to provide a structure of a battery pack having improved energy density by not excessively increasing its volume by having a heat pipe and / or a cooling channel embedded within a pack frame.

[0037] In addition, the present invention may have various other effects, which will be described in each embodiment, or the description of effects that can be easily inferred by a person skilled in the art will be omitted.

[0038] Figures 1 and 2 illustrate the structure of a battery module according to one embodiment of the present invention.

[0039] Figures 3 and 4 illustrate longitudinal cross-sections of a battery module according to one embodiment of the present invention.

[0040] Figures 5 and 6 show cross-sectional views of a battery module in one embodiment of the present invention.

[0041] Figure 7 illustrates a battery pack according to one embodiment of the present invention.

[0042] Figures 8 and 9 each show a cooling structure according to one embodiment of the present invention and a battery module arranged on the cooling structure.

[0043] Figure 10 shows the flow of refrigerant in Figure 9 as viewed from above.

[0044] Figure 11 shows the heat flow in Figure 9 as viewed from below.

[0045] Figures 12 and 13 illustrate longitudinal cross-sections of a battery pack according to one embodiment of the present invention.

[0046] Figures 14 and 15 illustrate cross-sectional views of a battery pack in one width direction according to one embodiment of the present invention.

[0047] Fig. 16 shows a vehicle having a battery pack built in according to one embodiment of the present invention.

[0048] [Explanation of symbols]

[0049] 1: Battery module

[0050] 11: Battery cell

[0051] 12: Module Frame

[0052] 13: Heat pipe

[0053] 130: Extension

[0054] 131: Protrusion

[0055] 2: Pack Frame

[0056] 20: Floor plate

[0057] 21: Side wall

[0058] 22: Bulkhead

[0059] 3: Cooling path

[0060] 30: Eurozone

[0061] 31: Inlet

[0062] 32: Outlet

[0063] P: Battery pack

[0064] V: Car

[0065] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0066] Although the terms "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0067] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0068] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0069] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0070] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0071] Throughout the specification, when we refer to "A and / or B", this means A, B, or A and B, unless otherwise stated, and when we refer to "C to D", this means C or more and D or less, unless otherwise stated.

[0072] Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0073]

[0074] [Battery module structure]

[0075] Hereinafter, with reference to FIGS. 1 to 6, the structure of a battery module and a heat pipe according to one embodiment of the present invention will be described in detail.

[0076] Figures 1 and 2 illustrate the structure of a battery module according to one embodiment of the present invention. Referring to these drawings, a battery module (1) according to one embodiment of the present invention may include a battery cell (11) and a module frame (12) that accommodates the battery cell.

[0077] The above battery cell (11) may be a pouch-type battery cell, but is not limited thereto.

[0078] The above battery cells (11) may be extended in the longitudinal direction and may be a plurality of cells stacked in the width direction.

[0079] It is preferable that the above battery cell (11) be directly connected to the bottom surface of the module frame (12) for heat dissipation or indirectly connected through a heat-conducting material such as a heat-conducting resin and / or heat-conducting sheet.

[0080] According to one embodiment of the present invention, the module frame (12) may be configured to include a frame body with an open upper portion and a top plate covering the upper portion thereof, but the module frame (12) may have any structure as long as it has a predetermined bottom surface and bottom surface.

[0081] Figures 3 and 4 illustrate longitudinal cross-sections of a battery module according to one embodiment of the present invention. Referring to these drawings, a heat pipe (13) extending longitudinally may be connected to the bottom surface of the battery module (1).

[0082] The heat pipe (13) can be manufactured by creating a vacuum state in a metal pipe with a specially processed interior, inserting a small amount of refrigerant, and sealing it. The type of refrigerant can be determined depending on the temperature at which the heat pipe (13) is used, and a cooling liquid containing water can generally be selected.

[0083] The above heat pipes (13) may be provided in multiples per battery module (1). Accordingly, the heat pipes (13) can uniformly absorb heat from the entire bottom of the battery module (1).

[0084] According to one embodiment of the present invention, the heat pipe (13) extends in the same longitudinal direction as the battery cells (11), so that even if only some of the battery cells (11) generate heat, it can cool them without transmitting heat to other battery cells, and all individual battery cells can be cooled uniformly.

[0085] Figures 5 and 6 illustrate cross-sectional views of a battery module according to another embodiment of the present invention. Referring to these drawings, it is preferable that the heat pipe (13) protrudes and extends longitudinally on one or both sides compared to the battery module (1).

[0086] At this time, the heat pipe (13) may include an extension (130) extending in the longitudinal direction and a protrusion (131) protruding upward from one or both ends of the extension (130) in the longitudinal direction. The protrusion (131) protruding upward may include not only a case where the protrusion (131) protrudes normally upward, but also a case where the protrusion (131) protrudes obliquely with even a small amount of a height component.

[0087] According to one embodiment of the present invention, the extension portion (130) can be connected to the bottom surface of the battery module (1), and the protrusion portion (131) can be provided on one or both sides in the longitudinal direction of the battery module (1).

[0088] As the protrusion (131) is provided, the heat absorbed by the heat pipe (13) from the battery module (1) can be concentrated on the protrusion (131) within the heat pipe (13). This may be due to a phase change of the refrigerant contained within the heat pipe (13) and convection of the gas, and thus, the entire bottom of the battery module (1) can be cooled simply by cooling the protrusion (131).

[0089] According to one embodiment of the present invention, the protrusions (131) may be provided on both sides of the battery module (1) to be cooled, and thus the battery module (1) may be cooled in both directions, but the heat pipe (13) may be extended to protrude only on one side in the longitudinal direction of the battery module (1), and only one end of the heat pipe (13) in the longitudinal direction may be cooled in one direction.

[0090]

[0091] [Overall structure of the battery pack]

[0092] Hereinafter, with reference to FIG. 7, the overall structure of a battery pack according to one embodiment of the present invention will be described in detail.

[0093] Fig. 7 illustrates a battery pack according to one embodiment of the present invention. Referring to this, a battery pack (P) according to one embodiment of the present invention may include the battery module (1) and a pack frame (2) that accommodates the battery module (1).

[0094] The above battery modules (1) may be arranged in multiple numbers in the width direction. In addition, the battery modules (1) may be arranged in a grid in which multiple rows arranged in the width direction are juxtaposed in the length direction. According to one embodiment of the present invention, the battery modules (1) may be arranged in a grid in which two rows, each of which is arranged in the width direction, are juxtaposed in the length direction.

[0095] The pack frame (2) may include a bottom plate (20) on which the battery modules (1) are placed and a side wall (21) forming an outer surface of the pack frame (2). The pack frame (2) may also include a partition wall (22) extending in the width direction between a plurality of rows of the battery modules (1) and dividing a space in which each row of the battery modules (1) is arranged.

[0096]

[0097] Cooling structure

[0098] Hereinafter, with reference to FIGS. 8 to 11, the cooling structure and operation thereof of a battery pack according to one embodiment of the present invention will be described in detail.

[0099] Figures 8 and 9 respectively illustrate a cooling structure according to one embodiment of the present invention and a battery module arranged on the cooling structure. Referring to these drawings, the battery pack (P) may include a cooling conduit (3) through which a coolant circulates. The cooling conduit (3) may be formed in a tubular shape so that the coolant can flow therein.

[0100] The above cooling path (3) may include a path section (30), an inlet (31), and an outlet (32).

[0101] The above-mentioned flow path (30) is connected to one or both longitudinal ends of the heat pipe (13) and may extend in the width direction. That the flow path (30) is connected to the heat pipe (13) may mean that the flow path (30) and the heat pipe (13) are thermally connected in any way, including cases where the flow path (30) and the heat pipe (13) are not fixed to each other but merely in contact, so that the heat of the heat pipe (13) can be transferred to the flow path (30).

[0102] When the heat pipe (13) protrudes and extends in one or both directions in the length direction compared to the battery module (1), the flow path (30) may contact the end of the heat pipe (13) not only in the length direction but also in the height direction. Accordingly, the planar area separately occupied by the flow path (30) is reduced, so that the increase in the volume of the battery pack (P) due to the cooling flow path (3) is minimized, and space utilization can be improved.

[0103] At this time, when the heat pipe (13) has the protrusion (131), the flow path (30) is connected to the protrusion (131) to effectively cool the heat pipe (13).

[0104] It is preferable that the inlet (31) through which refrigerant flows into the cooling channel (3) and the outlet (32) through which refrigerant flows out from the cooling channel (3) are located outside the pack frame (2). At this time, the inlet (31) and the outlet (32) protrude to the same outer side of the pack frame (2), thereby facilitating the supply and recovery of refrigerant.

[0105] The above inlet (31) is located higher than the above outlet (32) to facilitate smoother flow of refrigerant.

[0106] According to one embodiment of the present invention, the heat pipe (13) provided in each of the battery modules (1) is not in communication with the cooling channel (3) but is only thermally connected by contact, etc., so there is no need to provide a joint portion of the cooling channel (3) inside the pack frame (2), and accordingly, the risk of a short circuit occurring due to a coolant leak inside the pack frame (2) is also prevented.

[0107] Fig. 10 illustrates the flow of the refrigerant in Fig. 9 as viewed from above. Referring to this, the flow path (30) according to one embodiment of the present invention can extend in the width direction between the battery modules (1) arranged in two rows, and between the battery modules (1) and the side wall (21). Accordingly, the refrigerant introduced into the inlet (31) can cool the heat pipe (13) from both sides in the longitudinal direction of the battery module (1).

[0108] According to one embodiment of the present invention, the cooling channel (3) is arranged symmetrically to contact the battery modules (1) arranged in two rows, and since the flow of the coolant is also symmetrical, each row of the battery modules (1) can be cooled uniformly.

[0109] Fig. 11 shows the heat flow in Fig. 9 as viewed from below. Referring to this, the heat pipe (13) can absorb heat from the battery module (1), and the heat thus absorbed can be concentrated on the protrusion (131). The heat concentrated on the protrusion (131) can be absorbed by the flow path (30) and released to the outlet (32) via the refrigerant. At this time, the temperature of the refrigerant increases as it moves from the inlet (31) to the outlet (32), which may lower the cooling efficiency. According to one embodiment of the present invention, the cooling flow path (3) is arranged in both directions so that one end of the heat pipe (13) is closer to the inlet (31) and the other end is closer to the outlet (32), thereby uniformly cooling each of the battery modules (1).

[0110]

[0111] [Embedded structure of cooling channel]

[0112] Hereinafter, with reference to FIGS. 12 to 15, the buried structure of the heat pipe and cooling channel according to one embodiment of the present invention will be described in detail.

[0113] Figures 12 and 13 illustrate longitudinal cross-sections of a battery pack according to one embodiment of the present invention. Referring to these drawings, at least a portion of the heat pipe (13) may be embedded in the base plate (20).

[0114] According to one embodiment of the present invention, a portion of the extension portion (130) may be embedded in the floor plate (20), and at this time, the protrusion portion (131) may protrude upwards compared to the floor plate (20) and may be in vertical contact with the flow path portion (30). With this embedded structure, the overall height of the battery pack (P) may be reduced, thereby improving space utilization and energy density.

[0115] Figures 14 and 15 illustrate cross-sectional views of a battery pack according to one embodiment of the present invention. Referring to these drawings, the flow path (30) may extend in the width direction at least between each row of the battery modules (1) and between the battery modules (1) and the side wall (21).

[0116] Since the above-mentioned flow path (30) is provided on the horizontal side rather than the lower side of the battery module (1), an increase in the height of the battery pack (P) due to the flow path (30) is prevented. At this time, the flow path (30) may be accommodated in an empty space formed between each row of the battery module (1) and / or between the battery module (1) and the side wall (21), thereby not taking up additional space.

[0117] Preferably, at least a portion of the flow path (30) can be embedded in the side wall (21). Accordingly, the volume occupied by the flow path (30) can be further reduced, and the energy density of the battery pack (P) can be further improved.

[0118]

[0119] [Vehicles containing battery packs]

[0120] The present invention also provides a structure of an automobile including the battery pack (P).

[0121] Hereinafter, with reference to FIG. 16, the structure of an automobile having a battery pack built in according to one embodiment of the present invention will be described.

[0122] Figure 16 illustrates a vehicle equipped with a battery pack according to one embodiment of the present invention. Referring to this, the battery pack (P) may be installed in a vehicle (V) as a power source. The vehicle (V) may be a hybrid vehicle or an electric vehicle, but is not limited thereto. Furthermore, the vehicle (V) may be a two-wheeled vehicle or a four-wheeled vehicle, but is not limited thereto.

[0123]

[0124] It should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention will be determined by the claims that follow, rather than by the detailed description set forth above. Furthermore, the meaning and scope of the claims that follow, as well as all possible modifications and variations derived from their equivalent concepts, should be construed as encompassing the scope of the present invention.

[0125] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. A plurality of battery modules arranged in the width direction; A pack frame accommodating the above battery modules and having side walls and a bottom plate; A heat pipe connected to the bottom surface of the above battery module and extending in the longitudinal direction; A cooling channel is included, which is connected to one end of the longitudinal direction of the heat pipe and includes a channel section through which refrigerant circulates, an inlet through which refrigerant flows in, and an outlet through which refrigerant flows out; A battery pack, wherein at least one of the heat pipes and the euro portion has at least a portion thereof embedded in the pack frame.

2. In claim 1, A battery pack, wherein the heat pipe protrudes and extends longitudinally to one side compared to the battery module.

3. In claim 2, One longitudinal end of the heat pipe extends toward the side wall, A battery pack, wherein the above-mentioned euro portion is provided along the inner circumference of the side wall.

4. In claim 3, A battery pack, wherein at least a portion of the above-described euro portion is embedded in the side wall.

5. In claim 2, The above battery modules are arranged in multiple rows parallel to each other in the longitudinal direction, One longitudinal end of the heat pipe extends between each row of the battery modules, A battery pack, wherein the above-mentioned euro portion extends in the width direction between each row of the battery modules.

6. In claim 5, The above pack frame includes a bulkhead extending in the width direction between each row of the battery modules and dividing the space in which each row of the battery modules is arranged, A battery pack, wherein at least a portion of the above-mentioned euro portion is embedded in the bulkhead.

7. In claim 1, A battery pack, wherein the heat pipe protrudes and extends longitudinally on both sides compared to the battery module.

8. In claim 2, The longitudinal ends of the above heat pipe extend toward the side wall, A battery pack, wherein the above-mentioned euro portion is provided along the inner circumference of the side wall.

9. In claim 8, A battery pack, wherein at least a portion of the above-described euro portion is embedded in the side wall.

10. In claim 7, The above battery modules are arranged in multiple rows parallel to each other in the longitudinal direction, Each longitudinal end of the heat pipe extends between each row of the battery module or toward the side wall, A battery pack, wherein the euro portion extends in the width direction between each row of the battery modules and between the battery modules and the side wall.

11. In claim 10, The above pack frame includes a bulkhead extending in the width direction between each row of the battery modules and dividing the space in which each row of the battery modules is arranged, A battery pack, wherein at least a portion of the above-described euro portion is embedded in at least one of the bulkhead and the side wall.

12. In claim 1, A battery pack, wherein the heat pipe includes an extension portion extending in a longitudinal direction and a protrusion portion protruding upward from one or both ends of the extension portion.

13. In claim 12, A battery pack, wherein at least a portion of the extension is embedded in the floor plate.

14. In claim 1, A battery pack, wherein the above heat pipes are provided in multiple numbers for each battery module.

15. In claim 1, The above battery module is a battery pack containing a plurality of battery cells that extend in the length direction and are arranged in the width direction.

16. In claim 1, A battery pack wherein the inlet and outlet protrude and extend outwardly on the same side of the pack frame.

17. A vehicle comprising a battery pack according to any one of claims 1 to 16.

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