Battery module, battery pack, and device including same

Abstract

The present invention includes a battery module and a battery pack including the same. A battery module according to one embodiment of the present invention includes a battery cell stack in which a plurality of battery cells are stacked; and a module frame that houses the battery cell stack, wherein a bottom of the module frame includes a plurality of holes, and the holes may be provided with filler members.

Description

[Technical Field]

[0001] [CROSS-REFERENCE TO RELATED APPLICATIONS] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0091885, filed July 14, 2023, and all contents disclosed in the documents of this Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a battery module, a battery pack, and a device including the same, and more particularly to a battery module, a battery pack, and a device including the same with improved cooling performance. [Background technology]

[0003] As technological development and demand for mobile devices increases, the demand for secondary batteries as an energy source is rapidly increasing. As a result, much research is being conducted into secondary batteries that can meet various demands.

[0004] Secondary batteries are attracting much attention not only for use in mobile devices such as mobile phones, digital cameras, and notebook computers, but also as an energy source for power devices such as electric bicycles, electric vehicles, and hybrid electric vehicles.

[0005] Recently, as secondary batteries have been used as energy storage sources and the need for large-capacity secondary battery structures has increased, there has been an increasing demand for battery packs with medium to large modular structures that assemble battery modules in which multiple secondary batteries are connected in series / parallel.

[0006] Meanwhile, when a battery pack is constructed by connecting a plurality of battery cells in series / parallel, a battery module consisting of at least one battery cell is generally constructed, and other components are added to the at least one battery module to construct the battery pack. The battery cells that constitute such a medium- to large-sized battery module are composed of secondary batteries that can be charged and discharged, and such high-power, large-capacity secondary batteries generate a large amount of heat during the charging and discharging process.

[0007] Fig. 1 is a cross-sectional view showing a conventional battery module, and Fig. 2 is an enlarged view of area A1 in Fig. 1.

[0008] Referring to FIGS. 1 and 2, a conventional battery module 10 includes a plurality of battery cells 11 stacked together to form a battery cell stack 20, which is housed in a module frame 30.

[0009] As described above, the conventional battery module 10 generates a large amount of heat during charging and discharging because it includes multiple battery cells 11. As a cooling means, the battery module 10 may include a thermally conductive resin layer 40 located between the battery cell stack 20 and the bottom 31 of the module frame 30.

[0010] Furthermore, when the battery module 10 is mounted on a pack frame to form a battery pack, a heat transfer member 50 and a heat sink 60 may be sequentially positioned below the battery module 10. In this case, the heat transfer member 50 may be a heat dissipation pad, and the heat sink 60 may have a refrigerant flow path formed therein.

[0011] 1 and 2 , heat generated from the battery cells 11 is transferred toward the heat sink 60, passing 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 that order, before being transferred to the outside of the battery module 10. However, in a conventional battery module 10, when the heat generated from the battery cells 11 passes through the bottom 31 of the module frame 30, it does not only move in the z-axis direction toward the heat sink 60, but can also move in the x-axis and y-axis directions. That is, the heat generated from the battery cells 11 does not only move from the bottom 31 of the module frame 30 toward the heat sink 60, but can also move in a direction parallel to the bottom 31 of the module frame 30 in some cases.

[0012] This reduces the cooling efficiency of the battery, and if a thermal runaway phenomenon occurs in one battery cell 11, heat will be transmitted to adjacent battery cells 11 along the bottom 31 of the module frame 30, which may reduce the safety of the battery.

[0013] Therefore, there is a continuing trend toward safety-related requirements for battery modules and battery packs, and it is necessary to develop a battery module that can satisfy all of these various requirements while improving cooling performance. Summary of the Invention [Problem to be solved by the invention]

[0014] The problem to be solved by the present invention is to provide a battery module, a battery pack, and a device including the same, which have improved safety and cooling efficiency.

[0015] However, the problems to be solved by the embodiments of the present invention are not limited to the above-mentioned problems, and can be variously expanded within the scope of the technical ideas included in the present invention. [Means for solving the problem]

[0016] A battery module according to one embodiment of the present invention includes a battery cell stack in which a plurality of battery cells are stacked; and a module frame that houses the battery cell stack, wherein a bottom of the module frame includes a plurality of holes, and a filler member is provided in the plurality of holes.

[0017] The module frame and the filler member may be made of different materials.

[0018] The module frame may include a material having a lower thermal conductivity than the filler member, and the filler member may include a material having a higher thermal conductivity than the module frame.

[0019] The module frame may include SUS or steel, and the filler member may include copper (Cu) or aluminum (Al).

[0020] The plurality of holes may be formed to penetrate the bottom in a height direction.

[0021] A battery module according to another embodiment of the present invention may further include a heat insulating member positioned between the plurality of holes and the filling member.

[0022] The heat insulating member may be positioned in contact with the plurality of holes and the filler member.

[0023] The heat insulating member may include a ring shape.

[0024] The insulating member may include a thermal insulating material.

[0025] The heat insulating member may comprise a plastic material, including polyethylene (PE), polypropylene (PP), or a rubber material.

[0026] A battery pack according to another embodiment of the present invention includes the battery module described above; and a heat sink located in contact with a bottom of the battery module.

[0027] In this case, heat generated in the battery cell can be dissipated to the outside by moving from the battery cell through the filling member and the heat sink in sequence.

[0028] Heat generated in the battery cell can be discharged to the outside while moving in a first direction that is perpendicular to the bottom.

[0029] A thermally conductive resin layer may be provided between the battery cell stack and the bottom of the module frame, and a heat transfer member may be provided between the bottom of the module frame and the heat sink.

[0030] Heat generated in the battery cell may travel from the battery cell through the thermally conductive resin layer, the filler member, the heat transfer member, and the heat sink in sequence, and then be discharged to the outside. [Effects of the Invention]

[0031] According to the embodiment, the cooling performance of the battery module is improved, and when a thermal runaway phenomenon occurs in one battery cell, heat propagation to adjacent battery cells is reduced, thereby improving the safety of the battery.

[0032] The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims. [Brief explanation of the drawings]

[0033] [Figure 1] FIG. 10 is a cross-sectional view showing a conventional battery module. [Figure 2] 2 is an enlarged view of region A1 in FIG. 1. [Figure 3] 1 is a perspective view of a battery module according to an embodiment of the present invention; [Figure 4] 1 is an exploded perspective view of a battery module and a heat sink located under the battery module according to an embodiment of the present invention; [Figure 5] FIG. 4 is a perspective view of FIG. 3 as seen from the −z-axis direction. [Figure 6] FIG. 4 is a cross-sectional view taken along line BB' in FIG. [Figure 7] 7 is an enlarged view of region A2 in FIG. 6. [Figure 8] 10 is a top view showing a bottom portion according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0034] The present invention will now be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily understand and practice the various embodiments of the present invention. The present invention may be embodied in several different forms and is not limited to the embodiments described herein.

[0035] In order to clearly describe the present invention, parts that are not relevant to the description will be omitted and the same reference numerals will be used throughout the specification to refer to the same or similar components.

[0036] In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for the convenience of explanation, and the present invention is not necessarily limited to those shown in the drawings. In the drawings, thicknesses are exaggerated to clearly show multiple layers and regions. In the drawings, thicknesses of some layers and regions are exaggerated for the convenience of explanation.

[0037] Furthermore, when a layer, film, region, plate, or other part is said to be "on" or "above" another part, this includes not only the case where it is "directly above" that other part, but also the case where there is another part in between. Conversely, when a part is said to be "directly above" another part, it means that there is no other part in the middle. Furthermore, being "on" or "above" a reference part means being located above or below the reference part, and does not necessarily mean being "above" or "above" facing the opposite direction of gravity.

[0038] Furthermore, throughout the specification, when a part "comprises" a certain element, it does not mean that it excludes other elements, but that it may further include other elements, unless otherwise specified.

[0039] Also, throughout the specification, "on a plane" means when the target part is viewed from above, and "on a cross section" means when the target part is cut vertically and viewed from the side.

[0040] Furthermore, the terms "first" and "second" used in this application may be used to describe various components, but the components should not be limited by the terms. The terms are used only to distinguish one component from another.

[0041] Furthermore, in this application, the upper and lower can be defined as meaning the z-axis direction and the -z-axis direction, the side can be defined as meaning the x-axis direction and the -x-axis direction, and the front and back can be defined as meaning the y-axis direction and the -y-axis direction, respectively; however, these are arbitrary definitions used within the specification for convenience, and the scope of rights is not limited to these names.

[0042] Fig. 3 is a perspective view of a battery module according to an embodiment of the present invention, and Fig. 4 is an exploded perspective view of a battery module and a heat sink located below the battery module according to an embodiment of the present invention.

[0043] 3 and 4, a battery module 100 according to an embodiment of the present invention may include a battery cell stack 120 in which a plurality of battery cells 110 are stacked, a module frame 200 that houses the battery cell stack 120, a busbar assembly 300 located on the front (y-axis direction) and / or rear (-y-axis direction) of the battery cell stack 120, and an end plate 400 that covers the front (y-axis direction) and / or rear (-y-axis direction) of the battery cell stack 120.

[0044] First, the battery cell 110 may be a pouch-type battery cell. Such a pouch-type battery cell may be formed by housing an electrode assembly in a pouch case made of a laminate sheet including a resin layer and a metal layer, and then heat-sealing the sealing portion of the pouch case. In this case, the battery cell 110 may be formed in a rectangular sheet structure.

[0045] A plurality of such battery cells 110 may be configured, and the plurality of battery cells 110 may be stacked so as to be electrically connected to each other to form a battery cell stack 120. In particular, as shown in Fig. 4, the plurality of battery cells 110 may be stacked along a direction parallel to the x-axis.

[0046] The module frame 200 that houses the battery cell stack 120 can include a U-shaped frame 210 and a top cover 220 .

[0047] The U-shaped frame 210 may include a bottom portion 210a and two side portions 211 extending upward from both ends of the bottom portion 210a. The bottom portion 210a may cover the lower surface (negative z-axis direction) of the battery cell stack 120, and the side portions 211 may cover both side surfaces (negative x-axis direction and negative x-axis direction) of the battery cell stack 120.

[0048] The bottom portion 210a may include a plurality of holes 215 penetrating the bottom portion 210a in the up-down direction (z-axis direction and -z-axis direction). Filler members 250 may be positioned in the plurality of holes 215. Details of the filler members 250 will be described with reference to FIG. 5.

[0049] The upper cover 220 may be formed as a single plate-like structure that encloses the upper surface (z-axis direction) excluding the lower surface and both side surfaces that are enclosed by the U-shaped frame 210. The upper cover 220 and the U-shaped frame 210 may be joined by welding or the like with corresponding corners in contact with each other, thereby forming a structure that covers the battery cell stack 120 from above, below, left, and right. Therefore, the battery cell stack 120 may be physically protected by the upper cover 220 and the U-shaped frame 210. For this reason, the upper cover 220 and the U-shaped frame 210 may include a metal material having a predetermined strength.

[0050] Meanwhile, although not specifically shown, the module frame 200 according to the modified example may be a monoframe made of a metal plate in which the top, bottom, and both sides are integrated. That is, instead of a structure in which the U-shaped frame 210 and the upper cover 220 are interconnected, the module frame 200 may be manufactured by extrusion molding and have an integrated top, bottom, and both sides. Furthermore, the module frame 200 may be provided as an L-shaped frame structure in addition to a monoframe or U-shaped frame, or may be provided in various structures not described in the above examples.

[0051] The busbar assembly 300 may be located on one side of the battery cell stack 120 to cover one side of the battery cell stack 120 and also to guide the connection between the battery cell stack 120 and an external device. Specifically, the busbar assembly 300 may be located on the front surface (y-axis direction) or rear surface (-y-axis direction) of the battery cell stack 120.

[0052] The busbar assembly 300 includes a busbar frame 310 and a busbar 320 attached to one surface of the busbar frame 310. In this case, the busbar frame 310 may include an electrically insulating material. The busbar frame 310 may restrict the busbar 320 from contacting other parts of the battery cell 110 other than the part joined to the electrode lead protruding from the battery cell 110, thereby preventing an electrical short circuit from occurring.

[0053] The end plate 400 may serve to protect the battery cell stack 120 and the electrical components connected thereto from external physical impact by sealing the open surface of the module frame 200. To this end, the end plate 400 may be made of a material having a predetermined strength. For example, the end plate 400 may include a metal such as aluminum.

[0054] Specifically, the end plate 400 may be coupled (joined, sealed, or hermetically sealed) to the module frame 200 while covering the bus bar assembly 300 located on one side of the battery cell stack 120. That is, each corner of the end plate 400 may be coupled to a corresponding corner of the module frame 200 by welding or other methods. Although not shown, an insulating cover for electrical insulation may also be disposed between the end plate 400 and the bus bar assembly 300.

[0055] The heat sink 500 is located below the bottom 210 a of the module frame 200 and can include a lower heat sink 510 and an upper heat sink 520 located stacked on the lower heat sink 510 .

[0056] In this case, the lower heat sink 510 may include a protrusion 515 protruding toward the upper heat sink 520, and the protrusion 515 may be joined to the upper heat sink 520 by a method such as welding. In this case, the space between the lower heat sink 510 and the upper heat sink 520 may be a flow path through which a coolant flows. The upper heat sink 520 may be positioned facing the bottom 210a of the module frame 200.

[0057] The heat sink 500 may be made of aluminum (Al) and may include a flow path through which a refrigerant can move, but is not limited thereto, and may be any form including a material having a cooling performance capable of sufficiently cooling the heat generated from the battery module 100.

[0058] In the drawings, the heat sink 500 is shown as being positioned separately or independently, but is not limited thereto. For example, the heat sink 500 may be integrated with the battery module 100. Specifically, the bottom 210a of the module frame 200 may constitute an upper plate of the lower heat sink 510, and the protrusion 515 of the lower heat sink 510 and the bottom 210a may be positioned in contact with each other to form a flow path for the coolant.

[0059] The features and relationship between the bottom portion 210a and filler member 250 of the module frame 200 according to one embodiment of the present invention will now be described in more detail.

[0060] FIG. 5 is a perspective view of FIG. 3 as viewed from the −z axis direction.

[0061] Referring to FIG. 5, a bottom 210a of a U-shaped frame 210 according to an embodiment of the present invention may include a plurality of holes 215 and a filler member 250 filled between the holes 215.

[0062] Specifically, the bottom 210a of the U-shaped frame 210 may be provided with a plurality of holes 215 penetrating the bottom 210a. More specifically, the plurality of holes 215 may be provided penetrating 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 may be filled with a filler member 250.

[0063] The filler member 250 can be filled and positioned between the plurality of holes 215 .

[0064] In this case, the module frame 200 and the filler member 250 may be formed of different materials. Specifically, the module frame 200 and the filler member 250 may be made of different metals. More specifically, the filler member 250 may include a material with a higher thermal conductivity than the module frame 200 of the present invention.

[0065] That is, the module frame 200 according to the present invention may include a material having a lower thermal conductivity than the material constituting the conventional module frame, and may include a material having a lower thermal conductivity than the filler member 250. In contrast, the filler member 250 may include a material having a higher thermal conductivity than the module frame 200.

[0066] For example, the module frame 200 according to the present invention may include materials such as stainless steel (SUS) and steel. Therefore, the module frame 200 according to the present invention may include materials that are highly rigid and structurally sound, but that do not easily transmit heat. Meanwhile, the filler member 250 may include materials with higher thermal conductivity than the module frame 200, i.e., metals with high thermal conductivity. For example, the filler member 250 may include metals with high thermal conductivity, such as copper (Cu) and aluminum (Al).

[0067] Comparing the exemplary materials listed above, the module frame 200 can include a material with a thermal conductivity of approximately 20 W / mK, while the filler member 250 can include a material with a thermal conductivity of 200 W / mK or greater.

[0068] When heat is generated from a battery cell 110 and moves to the bottom 210a, 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 length direction (y-axis direction) of the bottom 210a due to the difference in the thermal conductivity and materials between the module frame 200 and the filling member 250. In other words, when heat generated from a battery cell 110 moves to the bottom 210a, the movement in the x and y directions of the bottom 210a where the adjacent battery cell 110 is located may decrease, and the movement in the z-axis direction where the bottom 210a comes into contact with the heat sink may be promoted.

[0069] Therefore, heat generated from one battery cell 110 can be prevented from transferring to other adjacent battery cells 110 along the bottom 210a of the module frame 200, i.e., heat propagation is reduced, thereby improving the safety of the battery.

[0070] In addition, since the heat generated from one battery cell 110 easily moves in the vertical direction (z-axis direction), it moves to the heat sink 500 that is in contact with the bottom 210a of the U-shaped frame 210, thereby improving the cooling performance of the battery.

[0071] Fig. 6 is a cross-sectional view showing the battery module and the heat sink taken along line BB' in Fig. 3. Fig. 7 is an enlarged cross-sectional view showing area A2 in Fig. 6 and part of the heat sink.

[0072] 6 and 7, a battery module 100 according to an embodiment of the present invention may be mounted on a heat sink 500 constituting a battery pack.

[0073] In the battery module 100, a thermally conductive resin layer 270 may be provided between the battery cell stack 120, in which a plurality of battery cells 110 are stacked, and the bottom 210a of the module frame 200. The thermally conductive resin layer 270 may be a thermal resin, and can fix and bond the module frame 200 and the battery cell stack 120. In addition, the thermally conductive resin layer 270 can transfer heat generated from the battery cells 110 to the bottom 210a of the module frame 200.

[0074] The battery module 100 may be mounted with its bottom 210a facing the heat sink 500. In this case, the battery module 100 may be mounted on the heat sink 500 via a heat transfer member 280. That is, the heat transfer member 280 may be positioned in contact with one surface of the module frame 200 and one surface of the heat sink 500. Specifically, since the heat transfer member 280 is positioned in contact with the bottom 210a of the module frame 200 and one surface of the heat sink 500, heat generated from the battery cells 110 is transferred to the outside via the heat sink 500.

[0075] 7, heat generated from the battery cells 110 can move toward the heat sink 500. Specifically, the heat generated from the battery cells 110 can move sequentially to the filling member 250 and the heat sink 500 and then be discharged to the outside. More specifically, the heat generated from the battery cells 110 can move to the bottom 210a of the module frame via the thermally conductive resin layer 270. In this case, the heat generated from the battery cells 110 can move to the heat sink 500 via the filling member 250, which has a higher thermal conductivity than the bottom 210a of the module frame. That is, the heat generated from the battery cells 110 can move in a first direction (D1), which is a vertical direction (z-axis direction) relative to the bottom 210a, through the filling member 250, but may not be able to move in a horizontal direction (x-axis or y-axis direction) through the bottom 210a of the module frame.

[0076] Thereafter, the heat that has passed through the filling member 250 can be transferred to the heat sink 500 via the heat transfer member 280. The heat that has reached the heat sink 500 can be discharged to the outside while moving in the second direction (D2), which is the direction of movement of the refrigerant, along the refrigerant flowing through the flow passages formed in the heat sink 500.

[0077] In summary, the heat generated from the battery cell 110 can be dissipated to the outside by moving sequentially from the battery cell 110 through the thermally conductive resin layer 270, the filling member 250, the heat transfer member 280, and the heat sink 500.

[0078] That is, heat generated from the battery cells 110 travels in a first direction (D1) along the filler member 250, which has a relatively higher thermal conductivity than the bottom 210a of the module frame. In this case, the heat generated from the battery cells 110 travels only in the first direction (D1) and not in a second direction (D2) within the module frame 200 due to the difference in the materials and thermal conductivities of the module frame 200 and the filler member 250. That is, the filler member 250 is positioned in the holes 215 formed in the bottom 210a of the module frame 200, thereby preventing heat generated from one battery cell 110 from traveling to another adjacent battery cell 110 along the bottom 210a of the module frame 200. This reduces heat transfer through the module frame, improving battery safety.

[0079] In addition, since 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, it can move to the heat sink 500 in contact with the bottom 210a of the module frame and then be discharged to the outside more easily than in the past, thereby improving the cooling performance of the battery.

[0080] FIG. 8 is a top view showing the bottom according to another embodiment of the present invention.

[0081] The content described in FIG. 8 corresponds to a modified example of the present invention, and therefore a description of the same content as in the configuration described above will be omitted.

[0082] Referring to FIG. 8, a bottom portion 210a of a module frame constituting a battery module 100' according to another embodiment of the present invention may further include a heat insulating member 251 in addition to a plurality of holes 215 and a filling member 250.

[0083] The heat insulating member 251 may be positioned between the plurality of holes 215 and the filling member 250. In this case, the outer circumferential surface of the heat insulating member 251 may be positioned in contact with the holes 215 and the filling member 250. Specifically, one surface of the heat insulating member 251 may be positioned in contact with the plurality of holes 215, and the other surface of the heat insulating member 251 may be positioned in contact with the filling member 250. In this case, the one surface of the heat insulating member 251 in contact with the holes 215 may be defined as the outer surface of the heat insulating member 251, and the one surface of the heat insulating member 251 in contact with the filling member 250 may be defined as the inner surface of the heat insulating member 251. The heat insulating member 251 may be in the shape of a ring in contact with the plurality of holes 215 and the filling member 250.

[0084] The heat insulating member 251 may include a heat insulating material. Furthermore, the heat insulating member 251 may also include an insulating material. For example, the heat insulating member 251 may include a plastic material such as polyethylene (PE) or polypropylene (PP), or a rubber material.

[0085] The heat insulating member 251 is positioned between the bottom 210a, which is provided with a plurality of holes 215, and the filling member 250, thereby improving the heat insulating and insulating ability therebetween. Specifically, when heat generated in the battery cell is transferred to the bottom 210a and the filling member 250, the heat insulating member 251 prevents the heat from transferring in the planar direction (x- and y-axes) by allowing the heat to transfer only in the vertical direction (z-axis direction) of the bottom 210a and the filling member 250. That is, the heat insulating member 251 contains a heat insulating material, preventing the heat from transferring in the planar direction of the bottom 210a and the filling member 250 and promoting the transfer in the vertical direction.

[0086] In summary, the battery module 100′ according to another embodiment of the present invention further includes the heat insulating member 251, which allows heat generated in the battery cells to more easily move vertically along the filler member 250, which has a relatively higher thermal conductivity than the bottom portion 210a. Therefore, the heat generated in the battery cells can be easily dissipated to the outside along the heat sink, thereby improving cooling performance and safety compared to conventional battery modules.

[0087] The battery module and the battery pack including the same can be applied to various devices, including transportation means such as electric bicycles, electric cars, and hybrid cars, but the present invention is not limited thereto and can be applied to various devices that can use the battery module and the battery pack including the same, which also fall within the scope of the present invention.

[0088] Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements made by those skilled in the art using the basic concept of the present invention defined in the claims below also fall within the scope of the present invention. [Explanation of symbols]

[0089] 100, 100' battery module 110 battery cells 120 Battery cell stack 200 Module Frame 210 U-shaped frame 210a bottom 215 holes 220 Upper cover 250 Filler 251 Heat insulating materials 270 Thermally conductive resin layer 280 Heat transfer components 300 Busbar Assembly 400 End Plate 500 heat sink

Claims

1. a battery cell stack in which a plurality of battery cells are stacked; and A battery module including a module frame that houses the battery cell stack, the bottom of the module frame includes a plurality of holes; The battery module includes a plurality of holes each provided with a filler member.

2. The battery module according to claim 1 , wherein the module frame and the filler member are made of different materials.

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

4. The module frame includes SUS or steel, The battery module according to claim 2 , wherein the filler member contains copper (Cu) or aluminum (Al).

5. 5. The battery module according to claim 1, wherein the plurality of holes are formed so as to penetrate the bottom in a height direction of the bottom.

6. The battery module according to claim 1 , further comprising a heat insulating member positioned between the plurality of holes and the filling member.

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

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

9. The battery module according to claim 6 , wherein the heat insulating member includes a heat insulating material.

10. The battery module according to claim 9 , wherein the heat insulating member includes a plastic material including polyethylene (PE) or polypropylene (PP), or a rubber material.

11. The battery module of claim 1; and The battery pack includes a heat sink positioned in contact with a bottom of the battery module.

12. The battery pack according to claim 11 , wherein heat generated in the battery cells travels from the battery cells through the filler member and the heat sink in that order, and is then discharged to the outside.

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

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

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

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