Battery module, and battery pack and device including same

Abstract

The present disclosure includes a battery module and a battery pack including the same, and the battery module according to an embodiment of the present disclosure includes: a battery cell stack in which a plurality of battery cells are stacked; and a module frame accommodating the battery cell stack, in which a bottom portion of the module frame includes a plurality of holes, and in which a filling member is disposed in the plurality of holes.

Description

TECHNICAL FIELD

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to, or the benefit of, Korean Patent Application No. 10-2023-0091885, filed on July 14, 2023, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.

[0003] The present disclosure relates to a battery module and a battery pack and a device including the same, and more particularly, to a battery module having improved cooling performance and a battery pack and a device including the same. BACKGROUND

[0004] As technology of mobile devices has developed and demand for the same has increased, demand for secondary batteries as an energy source has rapidly increased. Accordingly, a great deal of research has been conducted on secondary batteries capable of satisfying various demands.

[0005] Secondary batteries have received considerable attention as an energy source for electric power-driven devices, such as electric bicycles, electric vehicles, and hybrid electric vehicles, and as an energy source for mobile devices, such as mobile phones, digital cameras, and notebook computers.

[0006] Recently, as demand for a large-capacity secondary battery structure including the use of a secondary battery as an energy storage source continues to increase, demand for a battery pack as a multi-module structure of an assembly of a battery module in which a plurality of secondary batteries are connected in series / parallel is increasing.

[0007] Meanwhile, when a plurality of battery cells are connected in series or in parallel to configure a battery pack, a battery module composed of at least one battery cell is generally configured first, and then a battery pack is configured by using at least one battery module and adding other components. Since the battery cells constituting such a middle- or large-sized battery module are composed of secondary batteries that can be charged and discharged, such a high-output, large-capacity secondary battery generates a large amount of heat during charging and discharging.

[0008] Figure 1 is a cross-sectional view illustrating a conventional battery module. Figure 2 is an enlarged view of a region A1 in Figure 1 .

[0009] Referring to Figure 1 and Figure 2 , the conventional battery module 10 has a structure in which a plurality of battery cells 11 are stacked to form a battery cell stack 20 and the battery cell stack 20 is accommodated in a module frame 30.

[0010] As described above, since the conventional battery module 10 includes a plurality of battery cells 11, it generates a large amount of heat during charging and discharging. As a cooling device, the battery module 10 can include a thermally conductive resin layer 40 located between the battery cell stack 20 and the bottom 31 of the module frame 30.

[0011] Further, when the battery module 10 is installed on a battery pack frame to form a battery pack, the heat transfer member 50 and the heat sink 60 can be sequentially disposed under the battery module 10. In this case, the heat transfer member 50 can be a heat dissipation pad, and a coolant flow path can be formed inside the heat sink 60.

[0012] Referring to Figure 1 and Figure 2 , the heat generated from the battery cells 11 sequentially passes through the thermally conductive resin layer 40, the bottom 31 of the module frame 30, the heat transfer member 50, and the heat sink 60 in a direction toward the heat sink 60, and is transferred to the outside of the battery module 10. However, in the conventional battery module 10, when the heat generated from the battery cells 11 passes through the bottom 31 of the module frame 30, it can move not only in the z-axis direction toward the heat sink 60, but also in the x-axis and y-axis directions. In other words, the heat generated from the battery cells 11 can move not only in a direction from the bottom 31 of the module frame 30 toward the heat sink 60, but also in a direction parallel to the bottom 31 of the module frame 30.

[0013] Therefore, the cooling efficiency of the battery can be reduced, and if a thermal runaway phenomenon occurs in one battery cell 11, the heat is accelerated to spread to adjacent battery cells 11 along the bottom 31 of the module frame 30, which can cause a problem of reducing the safety of the battery.

[0014] Therefore, in the trend of continuously requiring the safety of the battery module and the battery pack, there is a great need to develop a battery module that can satisfy these various requirements and improve the cooling performance. SUMMARY

[0015] TECHNICAL PROBLEM

[0016] An object of the present disclosure is to provide a battery module having improved safety and cooling efficiency, and a battery pack and a device including the same.

[0017] However, the technical objects of the present disclosure are not limited to the above-mentioned technical objects, and can be extended in various ways within the scope of the technical ideas included in the present disclosure.

[0018] TECHNICAL SOLUTION

[0019] According to an embodiment of the disclosure, there is provided a battery module including: a battery cell stack in which a plurality of battery cells are stacked; and a module frame accommodating the battery cell stack, wherein a bottom of the module frame includes a plurality of holes, and wherein a filling member is disposed in the plurality of holes.

[0020] The module frame and the filling member can be formed of different materials.

[0021] The module frame can include a material having a lower thermal conductivity than the filling member, and the filling member can include a material having a higher thermal conductivity than the module frame.

[0022] The module frame can include SUS (stainless steel) or steel, and the filling member can include copper (Cu) or aluminum (Al).

[0023] The plurality of holes can be formed to pass through in a height direction of the bottom.

[0024] The battery module according to another embodiment of the disclosure can further include a heat insulation member located between the plurality of holes and the filling member.

[0025] The heat insulation member can be disposed in contact with the plurality of holes and the filling member.

[0026] The heat insulation member can have a ring shape.

[0027] The heat insulation member can include a heat insulation material.

[0028] The heat insulation member can include a plastic material or a rubber material, the plastic material including polyethylene (PE) or polypropylene (PP).

[0029] According to another embodiment of the disclosure, there is provided a battery pack including: the above-described battery module; and a heat sink disposed in contact with the bottom of the battery module.

[0030] In this case, heat generated from the battery cells can be discharged to the outside while sequentially moving from the battery cells to the filling member and the heat sink.

[0031] The heat generated from the battery cells can be discharged to the outside while moving in a first direction that is perpendicular to the bottom.

[0032] A thermally conductive resin layer can be disposed between the battery cell stack and the bottom of the module frame, and a heat transfer member can be disposed between the bottom of the module frame and the heat sink.

[0033] The heat generated from the battery cells can be discharged to the outside while sequentially moving from the battery cells to the thermally conductive resin layer, the filling member, the heat transfer member, and the heat sink.

[0034] Advantageous effects

[0035] According to embodiments, cooling performance of a battery module can be improved, and when a thermal runaway phenomenon occurs in one battery cell, heat propagation to an adjacent battery cell can be reduced, thereby improving safety of a battery.

[0036] Effects of the present disclosure are not limited to the above-mentioned effects, and those skilled in the art will clearly understand other additional effects not mentioned herein according to the description of the appended claims. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a cross-sectional view illustrating a conventional battery module.

[0038] Figure 2 is an enlarged view illustrating a region A1 of Figure 1

[0039] Figure 3 is a perspective view of a battery module according to an embodiment of the present disclosure.

[0040] Figure 4 is an exploded perspective view of a battery module and a heat sink located at a lower portion of the battery module according to an embodiment of the present disclosure.

[0041] Figure 5 is a perspective view of Figure 3 from a -z-axis direction.

[0042] Figure 6 is a cross-sectional view taken along a line B-B' of Figure 3

[0043] Figure 7 is an enlarged view illustrating a region A2 of Figure 6

[0044] Figure 8 is a top view illustrating a bottom according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the embodiments. The present disclosure can be implemented in various different ways, and is not limited to the embodiments set forth herein.

[0046] In order to clearly describe the present disclosure, the description of components irrelevant to the description of the present disclosure will be omitted, and throughout the specification, the same or similar components will be denoted by the same reference numerals.

[0047] ​​​Since the drawings arbitrarily show the size and thickness of each component for the convenience of description, the present disclosure is not necessarily limited to the shown size and thickness. The drawings depict the thickness in an enlarged scale to clearly show different layers and regions. Also, the drawings exaggerate the thickness of a certain layer or region to facilitate the description thereof.

[0048] When a layer, film, region, plate, etc. is disposed "on" a certain part, the description includes not only the case where the layer, film, region, plate, etc. is disposed "directly" on the certain part, but also the case where the layer, film, region, plate, etc. is disposed on the certain part via another part. When one part is disposed "directly" on another part, it means that there is no new component between the two parts. Also, when a component is disposed "on" a reference part, it means that the component is present on top of or below the reference part, and does not necessarily mean that the component is disposed only on the top of the reference part opposite to the direction of gravity.

[0049] Also, throughout the specification, when a part is referred to as "including" or "comprising" a certain component, it means that the part can further include other components unless otherwise specified, and does not exclude other components.

[0050] Also, throughout the specification, when referred to as "plan view", it means that the target part is viewed from the upper side at this time, and when referred to as "cross-sectional view", it means that the target part is viewed from the side of the cross-section cut vertically at this time.

[0051] Also, the terms such as first, second, etc. used herein can be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another component.

[0052] Also, in the present application, the upper and lower parts can be defined to represent the z-axis direction and -z-axis direction, respectively, the side surface can be defined to represent the y-axis direction and -y-axis direction, respectively, and the front surface and rear surface can be defined to represent the x-axis direction and -x-axis direction, respectively. However, for the convenience, the names are arbitrarily defined within the specification, and the scope of the right is not limited thereto.

[0053] Figure 3 is a perspective view of a battery module according to an embodiment of the present disclosure. Figure 4 is an exploded perspective view of a battery module and a heat sink located at the lower part of the battery module according to an embodiment of the present disclosure.

[0054] Referring to Figure 3 and Figure 4A battery module 100 according to an embodiment of the disclosure includes a battery cell stack 120 in which a plurality of battery cells 110 are stacked, a module frame 200 that accommodates the battery cell stack 120, a busbar assembly 300 located on a front surface (y-axis direction) and / or a rear surface (-y-axis direction) of the battery cell stack 120, and an end plate 400 that covers the front surface (y-axis direction) and / or the rear surface (-y-axis direction) of the battery cell stack 120.

[0055] First, the battery cell 110 can be a pouch-type battery cell. Such a pouch-type battery cell can be formed by accommodating an electrode assembly in a pouch case made of a laminate sheet including a resin layer and a metal layer, and then heat-welding a sealing portion of the pouch case. In this case, the battery cell 110 can be formed in a rectangular sheet shape structure.

[0056] Such a battery cell 110 can be composed of a plurality of cells, and the plurality of battery cells 110 are stacked to be electrically connected to each other, thereby forming the battery cell stack 120. Specifically, as shown in FIG. 1, the plurality of battery cells 110 can be stacked along a direction parallel to the x-axis. Figure 4

[0057] The module frame 200 that accommodates the battery cell stack 120 can include a U-shaped frame 210 and an upper cover 220.

[0058] The U-shaped frame 210 can include a bottom portion 210a and two side portions 211 extending upward from both ends of the bottom portion 210a. The bottom portion 210a can cover a lower surface (-z-axis direction) of the battery cell stack 120, and the side portions 211 can cover both side surfaces (x-axis direction and -x-axis direction) of the battery cell stack 120.

[0059] The bottom portion 210a can include a plurality of holes 215 that pass through the bottom portion 210a in the up-down direction (z-axis direction and -z-axis direction). A filling member 250 can be located in the plurality of holes 215. More specific details regarding the filling member 250 will be described later in Figure 5

[0060] The upper cover 220 can be formed in a single plate-like structure that surrounds a remaining upper surface (z-axis direction) except for the lower surface and both side surfaces surrounded by the U-shaped frame 210. In a state in which corresponding corner portions contact each other, the upper cover 220 can be combined with the U-shaped frame 210 by welding or the like, thereby forming a structure that covers the battery cell stack 120 in the upward direction, the downward direction, the leftward direction, and the rightward direction. Accordingly, the battery cell stack 120 can be physically protected by the upper cover 220 and the U-shaped frame 210. To this end, the upper cover 220 and the U-shaped frame 210 can contain a metal material having a predetermined strength.

[0061] ​​Meanwhile, although not specifically shown in the drawings, the module frame 200 according to the modified embodiment can be a single frame in the form of a metal plate material in which an upper surface, a lower surface, and two side surfaces are integrated. That is, this is not a structure in which the lower frame 210 and the upper cover 220 are combined with each other, but can be a structure produced by extrusion molding so that the upper surface, the lower surface, and the two side surfaces are integrated. Further, the structure of the module frame 200 can be provided as an L-shaped frame structure in addition to the single frame or the U-shaped frame, and can be provided as various structures not described in the above-described embodiments.

[0062] The busbar assembly 300 can be located on one surface of the battery cell stack 120, thereby covering one surface of the battery cell stack 120 and also guiding connection between the battery cell stack 120 and an external device. Specifically, the busbar assembly 300 can be located on a front surface (y-axis direction) or a rear surface (-y-axis direction) of the battery cell stack 120.

[0063] The busbar assembly 300 includes a busbar frame 310 and a busbar 320 mounted on one surface of the busbar frame 310. In this case, the busbar frame 310 can contain an electrically insulating material. The busbar frame 310 can restrict the busbar 320 from contacting other portions of the battery cell 110 except for a portion engaged with an electrode lead protruding from the battery cell 110, and can prevent an electrical short from occurring.

[0064] The end plate 400 can hermetically seal the open surface of the module frame 200, thereby protecting the battery cell stack 120 and electrical components connected thereto from external physical impact. To this end, the end plate 400 can be made of a material having a predetermined strength. For example, the end plate 400 can contain a metal such as aluminum.

[0065] Specifically, the end plate 400 can be combined (engaged, sealed, or hermetically sealed) with the module frame 200 and cover the busbar assembly 300 located on one surface of the battery cell stack 120. That is, the respective corner portions of the end plate 400 can be combined with the corresponding corner portions of the module frame 200 by a method such as welding. In addition, although not shown in the drawings, an insulating cover for electrical insulation can be further located between the end plate 400 and the busbar assembly 300.

[0066] The heat sink 500 is located below the bottom 210a of the module frame 200 and can include a lower heat sink 510 and an upper heat sink 520 stacked and disposed on the lower heat sink 510.

[0067] In this case, the lower heat spreader 510 includes a protrusion 515 protruding toward the upper heat spreader 520, wherein the protrusion 515 can be provided by being joined to the upper heat spreader 520 by a method such as welding. In this case, a space between the lower heat spreader 510 and the upper heat spreader 520 can be a flow path through which a coolant flows. The upper heat spreader 520 can be disposed to face the bottom 210a of the module frame 200.

[0068] The heat spreader 500 can be made of aluminum (Al) and can include a flow path through which a coolant can move. However, the present disclosure is not limited thereto and can be applied to any form containing a material having a cooling performance capable of sufficiently cooling heat generated from the battery module 100.

[0069] In this drawing, the heat spreader 500 is depicted as a configuration positioned separately or independently, but is not limited thereto. As an example, the heat spreader 500 can also be configured to be integrated with the battery module 100. Specifically, the bottom 210a of the module frame 200 constitutes an upper plate of the lower heat spreader 510, and the bottom 210a and the protrusion 515 of the lower heat spreader 510 are disposed to be in contact with each other, thereby forming a coolant flow path.

[0070] Next, the characteristics of the bottom 210a of the module frame 200 and the filling member 250 according to an embodiment of the present disclosure and the relationship therebetween will be described in more detail.

[0071] Figure 5 is a perspective view of the bottom 210a of the U-shaped frame 210 from the -z-axis direction. Figure 3 is a perspective view of the bottom 210a of the U-shaped frame 210.

[0072] Referring to Figure 5 , the bottom 210a of the U-shaped frame 210 according to an embodiment of the present disclosure can be provided with a plurality of holes 215 and a filling member 250 filling between the holes 215.

[0073] Specifically, the bottom 210a of the U-shaped frame 210 can be provided with a plurality of holes 215 penetrating the bottom 210a. More specifically, the plurality of holes 215 can be provided to penetrate the bottom 210a in the height direction (z-axis direction and -z-axis direction) of the battery cell 110. In this case, the plurality of holes 215 can be in a state in which they are filled with the filling member 250.

[0074] The filling member 250 can fill and be located between the plurality of holes 215.

[0075] In this case, the module frame 200 and the filling member 250 can be formed of different materials. Specifically, the module frame 200 and the filling member 250 can be made of different metals. More specifically, the filling member 250 can contain a material having a higher thermal conductivity than the module frame 200 of the present disclosure.

[0076] In other words, the module frame 200 according to the disclosure can contain a material having a lower thermal conductivity than a material constituting a general module frame, and can contain a material having a lower thermal conductivity than the filling member 250. In contrast, the filling member 250 can contain a material having a higher thermal conductivity than the module frame 200.

[0077] For example, the module frame 200 according to the disclosure can contain a material such as SUS or steel. Accordingly, the module frame 200 according to the disclosure can contain a material having high rigidity and thus high structural safety but not easily transmitting heat. In contrast, the filling member 250 can contain a material having a higher thermal conductivity than the module frame 200, i.e., a metal having high thermal conductivity. For example, the filling member 250 can contain a metal having high thermal conductivity, such as copper (Cu), aluminum (Al), or the like.

[0078] When comparing the exemplary materials listed above, the module frame 200 can contain a material having a thermal conductivity of about 20 W / mK, and the filling member 250 can contain a material having a thermal conductivity of 200 W / mK or more.

[0079] When heat is generated from the battery cell 110 and moves to the bottom 210a, due to the difference between the module frame 200 and the filling member 250 in terms of material and thermal conductivity, the heat can move in the height direction (z-axis direction) of the bottom 210a rather than in the width direction (x-axis direction) and the length direction (y-axis direction) of the bottom 210a. That is, when the heat generated from the battery cell 110 moves to the bottom 210a, the movement of the heat on the xy-axis of the bottom 210a where the adjacent battery cell 110 is located is reduced, and the movement of the heat in the z-axis direction in contact with the heat sink can be further promoted.

[0080] Accordingly, it is possible to prevent the heat generated from one battery cell 110 from moving along the bottom 210a of the module frame 200 to the adjacent other battery cell 110, thereby reducing the spread of heat and improving the safety of the battery.

[0081] In addition, since the heat generated from one battery cell 110 can easily move in the vertical direction (z-axis direction), it moves to the heat sink 500 in contact with the bottom 210a of the U-shaped frame 210, thereby improving the cooling performance of the battery.

[0082] Figure 6 is a cross-sectional view taken along Figure 3 line B-B' of Figure 7 is an enlarged view showing Figure 6 region A2 of

[0083] Referring toFigure 6 and Figure 7 The battery module 100 according to embodiments of the disclosure can be installed on and located on the heat sink 500 constituting the battery pack.

[0084] In the battery module 100, the thermally conductive resin layer 270 can be disposed between the cell stack 120 in which a plurality of battery cells 110 are laminated and the bottom 210a of the module frame 200. The thermally conductive resin layer 270 can be a thermal resin, and can fix and adhere the module frame 200 and the cell stack 120. In addition, since the thermally conductive resin layer 270, heat generated from the battery cells 110 can be transferred to the bottom 210a of the module frame 200.

[0085] The battery module 100 can have a structure in which the bottom 210a faces the heat sink 500 to be installed. In this case, the battery module 100 can be installed on the heat sink 500 via the heat transfer member 280. That is, the heat transfer member 280 can be disposed to be in contact with one surface of the module frame 200 and one surface of the heat sink 500. Specifically, the heat transfer member 280 can be disposed to be in contact with the bottom 210a of the module frame 200 and one surface of the heat sink 500, so that heat generated from the battery cells 110 can be transferred to the outside via the heat sink 500.

[0086] More closely observing the heat flow in Figure 7 , heat generated from the battery cells 110 can move toward the heat sink 500. Specifically, heat generated from the battery cells 110 can be discharged to the outside while sequentially moving toward the filling member 250 and the heat sink 500. More specifically, heat generated from the battery cells 110 can move toward the bottom 210a of the module frame via the thermally conductive resin layer 270. In this case, heat generated from the battery cells 110 can move toward the heat sink 500 via the filling member 250 having higher thermal conductivity than the bottom 210a of the module frame. That is, heat generated from the battery cells 110 can move in the first direction D1 (z-axis direction) as a vertical direction with respect to the bottom 210a via the filling member 250, and can not move in the horizontal direction (x-axis direction or y-axis direction) via the bottom 210a of the module frame.

[0087] Then, heat that has passed through the filling member 250 can be transferred to the heat sink 500 via the heat transfer member 280. Heat that has reached the heat sink 500 can be discharged to the outside while moving along the coolant flowing through the flow path formed in the heat sink 500 in the second direction (D2) as a moving direction of the coolant.

[0088] In summary, the heat generated from the battery cell 110 can be discharged to the outside while sequentially moving from the battery cell 110 to the thermally conductive resin layer 270, the filling member 250, the heat transfer member 280, and the heat sink 500.

[0089] That is, the heat generated from the battery cell 110 moves in the first direction D1 along the filling member 250 having a relatively high thermal conductivity than the bottom 210a of the module frame. In this case, since there is a difference in material and thermal conductivity between the module frame 200 and the filling member 250, the heat generated from the battery cell 110 can move within the module frame 200 only in the first direction D1 and not in the second direction D2. That is, the filling member 250 is located in the plurality of holes 215 provided in the bottom 210a of the module frame, thereby it can prevent the heat generated from one battery cell 110 from moving along the bottom 210a of the module frame 200 to the other battery cells 110 adjacent thereto. Accordingly, it is possible to reduce the heat propagation through the module frame and improve the safety of the battery.

[0090] Further, since the heat generated from one battery cell 110 moves more easily in the first direction D1 which is the vertical direction than in the second direction D2 which is the horizontal direction, the heat can more easily move to the heat sink 500 in contact with the bottom 210a of the module frame and then be discharged to the outside compared to the conventional case. Accordingly, it is possible to improve the cooling performance of the battery.

[0091] Figure 8 FIG. 10 is a plan view illustrating a bottom according to another embodiment of the disclosure.

[0092] Since Figure 8 The contents described in the above will be omitted from the description of the modified embodiment of the disclosure.

[0093] Referring to Figure 8 , the bottom 210a of the module frame constituting the battery module 100' according to another embodiment of the disclosure can include the heat insulation member 251 in addition to the plurality of holes 215 and the filling member 250.

[0094] The thermal insulation member 251 can be located between the plurality of holes 215 and the filling member 250. In this case, an outer circumferential surface of the thermal insulation member 251 can be provided in contact with the holes 215 and the filling member 250. Specifically, one surface of the thermal insulation member 251 can be in contact with the plurality of holes 215, and the other surface of the thermal insulation member 251 can be in contact with the filling member 250. At this time, the one surface of the thermal insulation member 251 in contact with the holes 215 can be defined as an outer surface of the thermal insulation member 251, and the one surface of the thermal insulation member 251 in contact with the filling member 250 can be defined as an inner surface of the thermal insulation member 251. The thermal insulation member 251 can be ring-shaped in contact with the plurality of holes 215 and the filling member 250.

[0095] The thermal insulation member 251 can include a thermal insulation material. Also, the thermal insulation member 251 can further include an electrically insulating material. For example, the thermal insulation member 251 can include a plastic material (e.g., polyethylene (PE), polypropylene (PP)) or a rubber material.

[0096] The thermal insulation member 251 is located between the bottom 210a having the plurality of holes 215 and the filling member 250, thereby being capable of improving thermal insulation performance and electrically insulating performance therebetween. Specifically, when heat generated from the battery cells is transferred to the bottom 210a and the filling member 250, the thermal insulation member 251 makes the heat move only in a vertical direction (z-axis direction) of the bottom 210a and the filling member 250, and can prevent the heat from moving in a surface direction (xy-axis direction). That is, the thermal insulation member 251 can include a thermal insulation material that prevents the heat from moving in the surface direction of the bottom 210a and the filling member 250 and promotes movement in the vertical direction.

[0097] In summary, the battery module 100' according to another embodiment of the disclosure further includes the thermal insulation member 251, which can make heat generated from the battery cells more easily move vertically along the filling member 250 having a relatively high thermal conductivity compared to the bottom 210a. Accordingly, the heat generated from the battery cells can be easily discharged to the outside along the heat sink, thereby improving cooling performance and safety compared to a conventional battery module.

[0098] The above-described battery module and the battery pack including the same can be applied to various devices. Such a device can be applied to, for example, a vehicle device of an electric bicycle, an electric vehicle, or a hybrid vehicle, but the disclosure is not limited thereto and is applicable to various devices capable of using the battery module and the battery pack including the same, which also falls within the scope of the disclosure.

[0099] Although the present disclosure has been described above with reference to the preferred embodiments, those skilled in the art will appreciate that the scope of the present disclosure is not limited to the embodiments, and various modifications and improvements can be made to the embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is defined by the appended claims and their equivalents.

[0100] [Reference Signs]

[0101] 100, 100': battery module

[0102] 110: battery cell

[0103] 120: battery cell stack

[0104] 200: module frame

[0105] 210: U-shaped frame

[0106] 210a: bottom

[0107] 215: hole

[0108] 220: upper cover

[0109] 250: filling member

[0110] 251: thermal insulation member

[0111] 270: thermally conductive resin layer

[0112] 280: heat transfer member

[0113] 300: bus bar assembly

[0114] 400: end plate

[0115] 500: heat sink

Claims

1. A battery module comprising: A battery cell stack, wherein a plurality of battery cells are stacked; as well as a module frame, accommodating the battery cell stack, wherein the bottom of the module frame comprises a plurality of holes, and Wherein, filling components are provided in the plurality of holes.

2. The battery module according to claim 1, wherein: The module frame and the filling member are formed of different materials.

3. The battery module according to claim 2, wherein: The module frame comprises a material having a lower thermal conductivity than the filler member, and The filler member includes a material having a higher thermal conductivity than the module frame.

4. The battery module according to claim 2, wherein: The module frame comprises stainless steel (SUS) or steel, and The filling member includes copper (Cu) or aluminum (Al).

5. The battery module according to claim 1, wherein: The plurality of holes are formed to penetrate the bottom portion in a height direction. The battery module according to claim 1 , further comprising a heat insulating member between the plurality of holes and the filling member.

7. The battery module according to claim 6, wherein: The heat insulating member is provided in contact with the plurality of holes and the filling member.

8. The battery module according to claim 6, wherein: The heat insulating member has a ring shape.

9. The battery module according to claim 6, wherein: The thermal insulation member includes a thermal insulation material.

10. The battery module according to claim 9, wherein: The thermal insulation member comprises a plastic material or a rubber material, and the plastic material includes polyethylene (PE) or polypropylene (PP).

11. A battery pack comprising: The battery module according to claim 1; as well as A heat sink is arranged to contact the bottom of the battery module.

12. The battery pack according to claim 11, wherein: Heat generated from the battery cells is discharged to the outside while sequentially moving from the battery cells to the filling member and the heat sink.

13. The battery pack according to claim 12, wherein: Heat generated from the battery cells is discharged to the outside while moving in a first direction that is a direction perpendicular to the bottom.

14. The battery pack according to claim 11, wherein: A thermally conductive resin layer is provided between the battery cell stack and the bottom of the module frame, and A heat transfer member is provided between the bottom of the module frame and the heat sink.

15. The battery pack according to claim 14, wherein: Heat generated from the battery cells is discharged to the outside while moving from the battery cells to the thermally conductive resin layer, the filling member, the heat transfer member, and the heat sink in this order.

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