Cooling structure of battery pack including heat pipe

Abstract

The present disclosure provides a structure of a battery pack, comprising: a plurality of battery modules arranged in a width direction; a pack frame having a side wall and a bottom plate, and accommodating a plurality of battery modules; a heat pipe in contact with bottom surfaces of the plurality of battery modules and extending in a length direction; and a cooling channel including: a coolant path through which a coolant circulates, the coolant path being connected to one lengthwise end portion of the heat pipe; an inlet for the coolant to enter; and an outlet for the coolant to exit.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0164674, filed on November 23, 2023, the entire contents of which are disclosed in the patent application documents are included as part of this specification.

[0002] This disclosure relates to a cooling structure including a heat pipe suitable for a battery pack in which multiple battery modules are built-in. Background Technology

[0003] The product group offers easy-to-use rechargeable batteries with electrical characteristics such as high energy density, which are widely used not only in portable devices but also in electric or hybrid vehicles powered by electric sources and in energy storage devices. These rechargeable batteries are gaining attention as a new energy source for improving eco-friendliness and energy efficiency, not only because they have the key advantage of significantly reducing fossil fuel use, but also because they do not produce any byproducts from energy use.

[0004] While small mobile devices use one, two, or three battery cells per device, medium to large devices such as vehicles require high output and large capacity. Therefore, medium to large-sized battery modules using multiple battery cells electrically connected together are used. Furthermore, multiple such battery modules can be integrated to form battery packs with even higher output and greater capacity.

[0005] On the other hand, battery modules may generate heat during the normal charging and discharging of individual battery cells. Therefore, battery packs are typically equipped with cooling structures to cool and dissipate this heat.

[0006] This type of cooling structure widely uses a configuration where a heat sink with high thermal conductivity is placed on the base plate of the battery pack, and the heat sink is cooled by air or water. The heat sink can be located at the bottom of each battery module, or at the bottom of the battery pack.

[0007] However, when a heatsink is installed for each battery module, the pipes through which the coolant flows need to be connected to each heatsink. This requires a complex assembly process, and coolant leaks from the vulnerable joints of the pipes can cause short circuits.

[0008] Furthermore, the coolant pathways within the radiator typically have large cross-sectional areas or long, complex zigzag paths to cover as much of the lower part of the battery module as possible. This slows down the cooling process and results in varying degrees of cooling for each component.

[0009] In particular, cooling may be less effective for the portion of a radiator closer to the outlet, and for the radiator closer to the outlet of the cooling channel of the entire battery pack in a series of radiators connected in series. Summary of the Invention

[0010] Technical issues

[0011] In order to solve the above-mentioned problems of the prior art, the purpose of this disclosure is to provide a battery pack structure with improved cooling efficiency.

[0012] Specifically, the purpose of this disclosure is to provide a battery pack structure with a cooling structure that can uniformly cool each part and each module of the battery module in one or two directions at a high cooling rate by including heat pipes.

[0013] Another object of this disclosure is to provide a battery pack structure that can prevent accidents (e.g., short circuits) due to coolant leakage by not placing a joint between the cooling channel and the heat pipe in the battery pack frame.

[0014] Another object of this disclosure is to provide a battery pack structure that has improved energy density through an effective cooling structure, while suppressing a large increase in volume.

[0015] The technical problem to be solved by this disclosure is not limited to the above-described objectives, and other objectives and advantages of this disclosure not described herein may be understood through the following description and will become clearer through examples of this disclosure. Furthermore, it will be apparent that the objectives and advantages of this disclosure may be embodied by the means stated in the claims and combinations thereof.

[0016] Technical solution

[0017] To address the aforementioned problems, this disclosure provides a battery pack structure comprising: a plurality of battery modules arranged along a width direction; a battery pack frame having sidewalls and a bottom plate, and the battery pack frame accommodating the plurality of battery modules; a heat pipe contacting the bottom surface of the plurality of battery modules and extending along a length direction; and a cooling channel comprising: a coolant path for coolant circulation, the coolant path being connected to a length-direction end of the heat pipe; an inlet for coolant entry; and an outlet for coolant exit.

[0018] According to this disclosure, as long as the heat pipes and cooling channels are in contact with each other but not connected to each other, it is sufficient to provide a battery pack structure that can prevent coolant from leaking into the battery pack frame due to damage to the vulnerable joints of the cooling channels and short circuits caused by the leakage.

[0019] Furthermore, according to this disclosure, since the cooling channel can be located at the end of the battery module in the longitudinal direction, the cooling structure will not make the lower part of the battery pack too thick, thereby improving space utilization and energy density.

[0020] The heat pipe extends protruding along the length of the battery module. Therefore, the coolant path can contact the end of the heat pipe both vertically and horizontally. Furthermore, because the heat pipe and cooling channel overlap vertically, the area occupied by the cooling structure is reduced, and space utilization is improved.

[0021] One end of the heat pipe can extend towards the sidewall. Here, the coolant path can be arranged along the inner circumferential surface of the sidewall. Since a coolant path can be arranged in the space between the battery module and the sidewall, space efficiency can be improved.

[0022] Preferably, at least a portion of the coolant path can be embedded in the sidewall. Therefore, even when the battery module is positioned very close to the sidewall, the coolant path can be configured without occupying a large space.

[0023] The battery modules can be arranged in multiple parallel columns along the length direction. According to embodiments of this disclosure, two columns of battery modules can be arranged.

[0024] Here, one end of the heat pipe can extend between the columns of the battery module, and the coolant path can extend in the width direction between the columns of the battery module. Since the coolant path is located in the space between the columns of the battery module, the coolant path does not occupy additional space.

[0025] Preferably, the battery pack frame may include partition walls extending in the width direction between the columns of battery modules and separating the space where the battery modules are arranged, and at least a portion of the coolant path may be embedded in the partition walls. Therefore, the space where the battery modules are arranged can be separated, while coolant paths are provided without occupying additional space.

[0026] Preferably, the heat pipe extends protruding to both sides in the length direction relative to the multiple battery modules.

[0027] For example, when the battery module described above can be configured as a single row, the two longitudinal ends of the heat pipe can extend toward the sidewall, and the coolant path can be arranged along the inner circumferential surface of the sidewall. Alternatively, at least a portion of the coolant path can be embedded in the sidewall.

[0028] According to embodiments of this disclosure, battery modules can be arranged in multiple parallel rows along their length, and the ends of heat pipes along their length extend between the rows of battery modules or toward the sidewalls. Here, coolant paths can extend along their width in at least one of the rows of battery modules and between the battery modules and the sidewalls. Here, at least a portion of the coolant path can be embedded in at least one of the partition wall and the sidewall.

[0029] A heat pipe may include: an extension that extends along its length; and a protrusion that extends upward from one or both ends of the extension along its length. Therefore, heat absorbed by the heat pipe can be concentrated at the protrusion located at one end of the heat pipe along its length, and the cooling efficiency of the heat pipe can be improved by connecting the protrusion to the coolant path.

[0030] Here, since only the protrusion connected to the coolant path can be exposed to the outside, at least a portion of the extension can be embedded in the base plate to further reduce the thickness of the lower part of the battery pack.

[0031] Preferably, multiple heat pipes are provided for each battery module.

[0032] A battery module may include multiple battery cells that extend in the length direction and are arranged in the width direction. Since both the battery module and the heat pipe extend in the length direction, the heat pipe can quickly and uniformly cool the battery cells even if each battery cell in the battery module generates different amounts of heat.

[0033] The inlet and outlet can extend outwards onto the same outer side of the battery pack frame. Therefore, since the connectors of the cooling channels can be located entirely outside the battery pack frame, the risk of coolant leakage within the battery pack frame can be reduced.

[0034] This disclosure also provides a vehicle structure including a battery pack. The battery pack can be integrated into the vehicle as a power source. The vehicle can be an electric vehicle or a hybrid vehicle. The vehicle can be a two-wheeled vehicle or a four-wheeled vehicle. However, the vehicle structure is not limited to this, and the battery pack does not necessarily have to be used as a power source for the vehicle.

[0035] Beneficial effects

[0036] This disclosure provides a battery pack structure that has improved cooling efficiency by including a heat pipe and a cooling channel connected to the heat pipe.

[0037] Specifically, this disclosure may provide a battery pack structure with a cooling structure that enables uniform cooling of each part and each module of the battery module in one or two directions at a high cooling rate by including heat pipes.

[0038] This disclosure may also provide a battery pack structure that prevents accidents due to coolant leakage by eliminating the need for joints between the cooling channels and the heat pipes in the battery pack frame.

[0039] This disclosure also provides a battery pack structure that has improved energy density by suppressing bulk increase through heat pipes and / or cooling channels embedded in the battery pack frame.

[0040] Furthermore, this disclosure may have various other effects, which will be described in various embodiments, or descriptions of effects that can be readily inferred by those skilled in the art will be omitted. Attached Figure Description

[0041] Figure 1 and Figure 2 The structure of a battery module according to an embodiment of the present disclosure is shown.

[0042] Figure 3 and Figure 4 A cross-section of a battery module taken along its width direction according to an embodiment of the present disclosure is shown.

[0043] Figure 5 and Figure 6 A cross-section of a battery module taken along its length according to an embodiment of the present disclosure is shown.

[0044] Figure 7 A battery pack according to an embodiment of the present disclosure is shown.

[0045] Figure 8 and Figure 9 A cooling structure according to an embodiment of the present disclosure and a cooling structure on which a battery module is disposed are shown respectively.

[0046] Figure 10 Shown from above Figure 9 The flow of coolant in the cooling structure.

[0047] Figure 11 Shown from below Figure 9 The flow of heat in the cooling structure.

[0048] Figure 12 and Figure 13 A cross-section of a battery pack taken along its width direction according to an embodiment of the present disclosure is shown.

[0049] Figure 14 and Figure 15 A cross-section of a battery pack taken along its length according to an embodiment of the present disclosure is shown.

[0050] Figure 16A vehicle including a battery pack according to an embodiment of the present disclosure is shown.

[0051] [Explanation of reference numerals in the attached figures]

[0052] 1: Battery Module

[0053] 11: Battery cell

[0054] 12: Battery pack frame

[0055] 13: Heat pipe

[0056] 130: Extension

[0057] 131: Prominent part

[0058] 2: Battery pack frame

[0059] 20: Base plate

[0060] 21: Side wall

[0061] 22: Partition wall

[0062] 3: Cooling Channel

[0063] 30: Coolant Path

[0064] 31: Entrance

[0065] 32: Exports

[0066] P: Battery pack

[0067] V: Vehicle Detailed Implementation

[0068] In the following, the above-described objects, features, and advantages will be described in detail with reference to the accompanying drawings, enabling those skilled in the art to implement the technical concepts of this disclosure. In describing this disclosure, detailed descriptions of prior art related to this disclosure will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the gist of this disclosure. In the following, preferred embodiments according to this disclosure 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.

[0069] Although terms such as "first" and "second" are used to describe various elements, these elements are certainly not limited by these terms. These terms are only used to distinguish one element from another, and unless otherwise specified, the first element may also be the second element.

[0070] Throughout this specification, unless otherwise stated, each element may be singular or plural.

[0071] In the following text, “arranging an element above (or below) an element” or “arranging an element on top (or at the bottom) of an element” means not only “arranging an element to contact the upper (or lower) surface”, but also “arranging an element above the upper (or lower) surface and inserting another element therebetween”.

[0072] Additionally, when an element is described as being “connected to” another element, “combined with” another element, or “in contact with” another element, it should be understood that the element may be “directly connected to” another element, “directly combined with” another element, or “directly in contact with” another element, or the element may be “connected to” another element, “combined with” another element, or “in contact with” another element via another element, provided that another element is inserted between the element and the other element.

[0073] Unless the context clearly specifies otherwise, the singular form used herein includes the plural form. Terms such as “comprising” or “including” as used herein should not be construed as including all elements or steps described in the specification, and should be construed as excluding some elements or steps, or including additional elements or steps.

[0074] Throughout this specification, unless otherwise specified, “A and / or B” means A, B, or A and B, and unless otherwise specified, “C to D” means from equal to or higher than C to equal to or lower than D.

[0075] In the following description, preferred embodiments of the present disclosure will be illustrated with reference to the accompanying drawings.

[0076] [Structure of the battery module]

[0077] In the following text, refer to Figures 1 to 6 The structure of the battery module and heat pipe according to embodiments of the present disclosure will be described in detail.

[0078] Figure 1 and Figure 2 The structure of a battery module according to an embodiment of the present disclosure is shown. (Refer to...) Figure 1 and Figure 2 According to embodiments of the present disclosure, the battery module 1 may include a battery cell 11 and a battery pack frame 12 that houses the battery cell 11.

[0079] The battery cell 11 can be, but is not limited to, a pouch cell.

[0080] The battery cell 11 can extend in the length direction, and multiple battery cells can be stacked in the width direction.

[0081] For heat dissipation, preferably, the battery cell 11 is in direct contact with the bottom surface of the battery pack frame 12, or indirect contact with the bottom surface of the battery pack frame 12 via a thermally conductive material such as thermally conductive resin and / or a thermally conductive sheet.

[0082] According to embodiments of this disclosure, the battery pack frame 12 may include a frame body having an open upper portion and a top plate covering the upper portion. However, the battery pack frame 12 may have any structure, as long as a bottom surface and a lower surface are provided.

[0083] Figure 3 and Figure 4 A cross-section of a battery module taken along its width direction according to an embodiment of the present disclosure is shown. (Refer to...) Figure 3 and Figure 4 The heat pipe 13, which extends in the length direction, can contact the bottom surface of the battery module 1.

[0084] The heat pipe 13 can be manufactured by creating a vacuum in a specially treated metal tube, inserting a small amount of coolant into the metal tube, and sealing the metal tube. The type of coolant can be selected according to the temperature at which the heat pipe 13 is used, and water-containing coolants are typically selected.

[0085] Multiple heat pipes 13 can be provided for each battery module 1. Therefore, the heat pipes 13 can absorb heat evenly from the entire lower part of the battery module 1.

[0086] According to embodiments of the present disclosure, the heat pipe 13 extends along the length of the battery cell 11, such that a portion of the battery cell 11 that generates heat can be cooled without transferring heat to other battery cells, thereby uniformly cooling all individual battery cells.

[0087] Figure 5 and Figure 6 A cross-section of a battery module taken along its length according to an embodiment of the present disclosure is shown. (Refer to...) Figure 5 and Figure 6 Preferably, one or both ends of the heat pipe 13 protrude relative to the battery module 1 in the longitudinal direction.

[0088] Here, the heat pipe 13 may include an extension 130 extending in the length direction and a protrusion 131 extending in the upward direction from one or both of its length directions ends. The "protrusion 131 extending in the upward direction" may include a structure that extends obliquely with a small height component and a structure that extends vertically.

[0089] According to embodiments of the present disclosure, the extension 130 may contact the bottom surface of the battery module 1, and the protrusion 131 may be disposed at one or both lengthwise ends of the battery module 1.

[0090] When the protrusion 131 is provided, the heat absorbed by the heat pipe 13 from the battery module 1 can be concentrated at the protrusion 131. This is likely due to the phase change of the coolant and the convection of the gas contained in the heat pipe 13. Therefore, the entire lower part of the battery module 1 can be cooled by cooling only the protrusion 131.

[0091] According to embodiments of this disclosure, the protrusion 131 can be disposed at both ends of the battery module 1 along its length and be cooled, thus allowing the battery module 1 to be cooled bidirectionally. However, the heat pipe 13 can be disposed at only one end of the battery module 1 along its length, so that only one end of the heat pipe 13 along its length can be cooled unidirectionally.

[0092] [Overall structure of the battery pack]

[0093] In the following text, refer to Figure 7 The overall structure of the battery pack according to embodiments of the present disclosure will be described in detail below.

[0094] Figure 7 A battery pack according to an embodiment of the present disclosure is shown. (Refer to...) Figure 7 According to embodiments of the present disclosure, the battery pack P may include a battery module 1 and a battery pack frame 2 that houses the battery module 1.

[0095] Multiple battery modules 1 can be arranged along the width direction. Furthermore, the battery modules 1 can be arranged in a grid pattern in multiple parallel columns along the length direction. According to embodiments of this disclosure, two columns of battery modules 1 can be arranged in a grid pattern along the length direction, wherein multiple battery modules 1 are arranged in the width direction within each column.

[0096] The battery pack frame 2 may include a base plate 20 on which battery modules 1 are disposed and sidewalls 21 forming the outer surface of the battery pack frame 2. The battery pack frame 2 may also include partition walls 22, which extend in the width direction between the rows of battery modules 1 and separate the spaces in which the rows of battery modules 1 are disposed.

[0097] [Cooling Structure]

[0098] In the following text, refer to Figures 8 to 11 The cooling structure and operation of the battery pack according to embodiments of the present disclosure will be described in detail.

[0099] Figure 8 and Figure 9 A cooling structure according to an embodiment of the present disclosure and a cooling structure on which a battery module is disposed are shown respectively. (Refer to...) Figure 8 and Figure 9The battery pack P may include a cooling channel 3 through which coolant circulates. The cooling channel 3 may be tubular, allowing coolant to flow within it.

[0100] The cooling channel 3 may include a coolant path 30, an inlet 31, and an outlet 32.

[0101] The coolant path 30 may be connected to one or both ends of the heat pipe 13 along its length and may extend in the width direction. "Coolant path 30 connected to heat pipe 13" may refer to a structure in which the coolant path 30 is in thermal contact with the heat pipe 13 but not tightly fastened to each other, so that heat from the heat pipe 13 can be conducted to the coolant path 30.

[0102] When one or both ends of the heat pipe 13 protrude relative to the battery module 1, the coolant path 30 can contact the ends of the heat pipe 13 in both the height and length directions. Therefore, the area occupied by the coolant path 30 is reduced, minimizing the increase in the volume of the battery pack P caused by the cooling channel 3, and improving space utilization.

[0103] Here, when the heat pipe 13 is provided with a protrusion 131, the coolant path 30 can be connected to the protrusion 131 to effectively cool the heat pipe 13.

[0104] Preferably, the inlet 31 and outlet 32 ​​for the coolant to enter and exit the cooling channel 3 are located on the outer surface of the battery pack frame 2. Here, the inlet 31 and outlet 32 ​​protrude outward from one side of the battery pack frame 2 in the same direction, thereby facilitating the supply and recovery of coolant.

[0105] Inlet 31 can be set higher than outlet 32 ​​to facilitate coolant flow.

[0106] According to embodiments of this disclosure, since the heat pipe 13 provided for each battery module 1 is not connected to the cooling channel 3, but is only thermally connected through contact with it, there is no need to provide a joint between the cooling channel 3 and the heat pipe 13 within the battery pack frame 2. Therefore, the risk of coolant leakage from the battery pack frame 2 and causing a short circuit is also prevented.

[0107] Figure 10 Shown from above Figure 9 The flow of coolant in the cooling structure. (Refer to...) Figure 10 According to embodiments of the present disclosure, the coolant path 30 can extend in the width direction between the two rows of battery modules 1 and between the two rows of battery modules 1 and the sidewall 21. Therefore, the coolant introduced into the inlet 31 can cool the heat pipe 13 at both longitudinal ends of the battery module 1.

[0108] According to embodiments of this disclosure, the cooling channel 3 is symmetrically arranged with the two rows of battery modules 1, and since the flow of coolant is also symmetrical, each row of battery modules 1 can be cooled uniformly.

[0109] Figure 11 Shown from below Figure 9 The flow of heat within the cooling structure. (Refer to...) Figure 11 The heat pipe 13 can absorb heat from the battery module 1, and the absorbed heat can be concentrated at the protrusion 131. The coolant in the coolant path 30 can absorb the heat concentrated at the protrusion 131 and release it through the outlet 32. Here, the temperature of the coolant increases as the coolant travels from the inlet 31 to the outlet 32, so the cooling efficiency may decrease. However, according to the embodiments of this disclosure, since one end of the heat pipe 13 is closer to the inlet 31 and the other end is closer to the outlet 32, the cooling channel 3 can cool each battery module 1 uniformly.

[0110] [Embedded structure of cooling channels]

[0111] In the following text, refer to Figures 12 to 15 The embedded structure of heat pipes and cooling channels according to embodiments of the present disclosure will be described in detail.

[0112] Figure 12 and Figure 13 A cross-section of a battery pack taken along its width direction according to an embodiment of the present disclosure is shown. (Refer to...) Figure 12 and Figure 13 At least a portion of the heat pipe 13 can be embedded in the base plate 20.

[0113] According to an embodiment of this disclosure, a portion of the extension 130 can be embedded in the base plate 20. Here, the protrusion 131 can project upward relative to the base plate 20 and contact the coolant path 30. This embedded structure reduces the overall height of the battery pack P, thereby improving space utilization and energy density.

[0114] Figure 14 and Figure 15 A cross-section of a battery pack taken along its length according to an embodiment of the present disclosure is shown. (Refer to...) Figure 14 and Figure 15 The coolant path 30 may extend in the width direction in at least one of the columns of the battery module 1 and between the columns of the battery module 1 and the sidewall 21.

[0115] Since the coolant path 30 is located on the horizontal side of the battery module 1 rather than below it, the increase in the height of the battery pack P due to the coolant path 30 is prevented. Here, the coolant path 30 can be accommodated in the space between the columns of the battery module 1 and / or the space between the battery module 1 and the side wall 21 without occupying additional space.

[0116] Preferably, at least a portion of the coolant path 30 can be embedded in the sidewall 21. Therefore, the volume occupied by the coolant path 30 can be further reduced, and the energy density of the battery pack P can be further improved.

[0117] [Vehicles including battery packs]

[0118] This disclosure also provides a structure for a vehicle including a battery pack P.

[0119] In the following text, refer to Figure 16 The structure of a vehicle including a battery pack according to embodiments of the present disclosure will be described.

[0120] Figure 16 A vehicle including a battery pack according to an embodiment of the present disclosure is shown. (Refer to...) Figure 16 The battery pack P can be integrated into the vehicle V as a power source. The vehicle V can be a hybrid vehicle or an electric vehicle, but is not limited to these. Furthermore, the vehicle V can be a two-wheeled vehicle or a four-wheeled vehicle, but is not limited to these.

[0121] It should be understood that the described embodiments are illustrative in all respects and not restrictive, and the scope of this disclosure will be indicated by the appended claims rather than the specific embodiments described. The meaning and scope of the claims to be described, as well as all changes and modifications derived from equivalent concepts, should be construed as being included within the scope of this disclosure.

[0122] Although this disclosure has been described with reference to exemplary accompanying drawings, it will be understood that this disclosure is not limited to the embodiments and drawings disclosed herein, and those skilled in the art will understand that various modifications are possible without departing from the scope and concept of this disclosure. Furthermore, although the operational effects of configurations according to this disclosure are not explicitly described in the description of embodiments of this disclosure, it should be understood that predictable effects will also be identified depending on the configuration.

Claims

1. A battery pack, comprising: Multiple battery modules, the multiple battery modules being arranged along the width direction; A battery pack frame having side walls and a bottom plate, and the battery pack frame accommodating the plurality of battery modules; A heat pipe that contacts the bottom surface of the plurality of battery modules and extends along its length; as well as The cooling channel includes: a coolant path for coolant circulation, the coolant path being connected to one longitudinal end of the heat pipe; an inlet for the coolant to enter; and an outlet for the coolant to exit. At least a portion of at least one of the heat pipe and the coolant path is embedded in the battery pack frame.

2. The battery pack according to claim 1, wherein, The heat pipe extends protruding along one side of the length relative to the battery module.

3. The battery pack according to claim 2, wherein, One longitudinal end of the heat pipe extends toward the sidewall side, and The coolant path is provided along the inner circumferential surface of the sidewall.

4. The battery pack according to claim 3, wherein, At least a portion of the coolant path is embedded in the sidewall.

5. The battery pack according to claim 2, wherein, The battery modules are arranged in multiple columns side by side along the length direction. One end of the heat pipe extends along its length into the spaces between the columns of the battery module, and The coolant path extends in the width direction between the columns of the battery module.

6. The battery pack according to claim 5, wherein, The battery pack frame includes partition walls that extend in the width direction between the columns of battery modules and separate the space where the columns of battery modules are arranged. At least a portion of the coolant path is embedded in the partition wall.

7. The battery pack according to claim 1, wherein, The heat pipe extends protruding to both sides in the length direction relative to the plurality of battery modules.

8. The battery pack according to claim 2, wherein, The two ends of the heat pipe extend toward the sidewall in the longitudinal direction, and The coolant path is provided along the inner circumferential surface of the sidewall.

9. The battery pack according to claim 8, wherein, At least a portion of the coolant path is embedded in the sidewall.

10. The battery pack according to claim 7, wherein, The battery modules are arranged in multiple columns side by side along the length direction. The ends of the heat pipes extend along their length into the spaces between the columns of the battery module or toward the sidewall. The coolant path extends in the width direction in at least one of the columns of the battery module and between the battery module and the sidewall.

11. The battery pack according to claim 10, wherein, The battery pack frame includes partition walls that extend in the width direction between the columns of battery modules and separate the space where the columns of battery modules are arranged. At least a portion of the coolant path is embedded in at least one of the partition wall and the side wall.

12. The battery pack according to claim 1, wherein, The heat pipe includes: an extension that extends along a length direction; and a protrusion that extends upward from one or both ends of the extension along a length direction.

13. The battery pack according to claim 12, wherein, At least a portion of the extension is embedded in the base plate.

14. The battery pack according to claim 1, wherein, Each battery module is equipped with multiple heat pipes.

15. The battery pack according to claim 1, wherein, The battery module includes multiple battery cells that extend in the length direction and are arranged in the width direction.

16. The battery pack according to claim 1, wherein, The inlet and the outlet extend outwards toward the same outer side of the battery pack frame.

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

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