Battery module, battery pack, and device including same

Abstract

The present invention includes a battery module and a battery pack comprising same, the battery module, according to one embodiment of the present invention, comprising: a battery cell stack having a plurality of battery cells stacked; and a module frame for accommodating the battery cell stack, wherein the bottom part of the module frame comprises a plurality of holes, and filling members may be provided in the plurality of holes.

Description

Battery module, battery pack, and device including the same

[0001] Cross-citation with related application(s)

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2023-0091885, filed July 14, 2023, the entire contents of which are incorporated herein by reference.

[0003] 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.

[0004] As technological developments and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing. Accordingly, extensive research is being conducted on secondary batteries that can meet diverse needs.

[0005] Secondary batteries are attracting much attention not only as an energy source for mobile devices such as cell phones, digital cameras, and laptops, but also as a power source for power devices such as electric bicycles, electric cars, and hybrid electric vehicles.

[0006] Recently, as the need for large-capacity secondary battery structures has increased, including the use of secondary batteries as energy storage sources, the demand for battery packs with medium- to large-sized module structures that assemble battery modules in which a number of secondary batteries are connected in series / parallel is increasing.

[0007] Meanwhile, when configuring a battery pack by connecting multiple battery cells in series / parallel, a common method is to configure a battery module composed of at least one battery cell, and then configure the battery pack by adding other components using at least one battery module. Since the battery cells constituting these medium- to large-sized battery modules are composed of secondary batteries capable of charging and discharging, such high-output, large-capacity secondary batteries generate a large amount of heat during the charging and discharging process.

[0008] Fig. 1 is a cross-sectional view showing a conventional battery module. Fig. 2 is an enlarged view showing area A1 of Fig. 1.

[0009] Referring to FIGS. 1 and 2, a conventional battery module (10) has a plurality of battery cells (11) stacked to form a battery cell stack (20), and the battery cell stack (20) is housed in a module frame (30).

[0010] As previously described, a conventional battery module (10) includes a plurality of battery cells (11), and thus generates a large amount of heat during the charging and discharging process. As a cooling means, the battery module (10) may include a thermally conductive resin layer (40) positioned between the battery cell stack (20) and the bottom portion (31) of the module frame (30).

[0011] In addition, when the battery module (10) is mounted on the pack frame to form a battery pack, a heat transfer member (50) and a heat sink (60) may be sequentially positioned under 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 coolant passage formed therein.

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

[0013] Because of this, there is a problem that the cooling efficiency of the battery may be reduced, and when a thermal runaway phenomenon occurs in one battery cell (11), heat transmission to neighboring battery cells (11) along the bottom part (31) of the module frame (30) may be promoted, thereby reducing the safety of the battery.

[0014] Therefore, with the ongoing trend of increasing safety requirements for battery modules and battery packs, it is practically necessary to develop a battery module that can satisfy these various requirements while also improving cooling performance.

[0015] The problem to be solved by the present invention is to provide a battery module, a battery pack, and a device including the same with improved safety and cooling efficiency.

[0016] However, the problems to be solved by the embodiments of the present invention are not limited to the problems described above and can be expanded in various ways within the scope of the technical ideas included in the present invention.

[0017] 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 for accommodating the battery cell stack, wherein a bottom portion of the module frame includes a plurality of holes, and a filling member is provided in the plurality of holes.

[0018] The above module frame and the above filling member may be made of different materials.

[0019] The module frame may include a material having a lower thermal conductivity than the filling member, and the filling member may include a material having a higher thermal conductivity than the module frame.

[0020] The above module frame may include SUS or steel, and the filling member may include copper (Cu) or aluminum (Al).

[0021] The above plurality of holes can be formed by penetrating in the height direction of the bottom portion.

[0022] A battery module according to another embodiment of the present invention may further include an insulating member positioned between the plurality of holes and the filling member.

[0023] The above insulating member can be positioned in contact with the plurality of holes and the filling member.

[0024] The above insulating member may have a ring shape.

[0025] The above insulating member may include an insulating material.

[0026] The above insulating material may include a plastic material including polyethylene (PE) or polypropylene (PP) or a rubber material.

[0027] A battery pack according to another embodiment of the present invention comprises the battery module described above; and a heat sink positioned in contact with a bottom portion of the battery module.

[0028] In this case, the heat generated in the battery cell can be discharged to the outside while sequentially moving from the battery cell to the filling member and the heat sink.

[0029] Heat generated in the above battery cell can be discharged to the outside while moving in a first direction that is perpendicular to the bottom portion.

[0030] 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.

[0031] Heat generated in the battery cell can be discharged to the outside while sequentially moving from the battery cell through the thermally conductive resin layer, the filling member, the heat transfer member, and the heat sink.

[0032] According to embodiments, the cooling performance of a battery module can be improved, and when a thermal runaway phenomenon occurs in one battery cell, heat transmission to neighboring battery cells can be reduced, thereby improving the safety of the battery.

[0033] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0034] Figure 1 is a cross-sectional view showing a conventional battery module.

[0035] Figure 2 is a drawing showing an enlarged view of area A1 of Figure 1.

[0036] Figure 3 is a perspective view of a battery module according to one embodiment of the present invention.

[0037] FIG. 4 is an exploded perspective view of a battery module and a heat sink positioned at the bottom of the battery module according to one embodiment of the present invention.

[0038] Figure 5 is a perspective view of Figure 3 viewed from the -z-axis direction.

[0039] Fig. 6 is a cross-sectional view taken along line B-B' of Fig. 3.

[0040] Figure 7 is an enlarged view of area A2 of Figure 6.

[0041] Figure 8 is a top view showing a bottom portion according to another embodiment of the present invention.

[0042] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

[0043] In order to clearly explain the present invention, parts that are not related to the description are omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0044] Furthermore, the sizes and thicknesses of each component shown in the drawings are arbitrarily indicated for convenience of explanation, and thus the present invention is not necessarily limited to the illustrated components. In the drawings, the thicknesses are enlarged to clearly represent various layers and regions. Furthermore, in the drawings, the thicknesses of some layers and regions are exaggerated for convenience of explanation.

[0045] Furthermore, when we say that a layer, membrane, region, plate, or other part is "on" or "over" another part, this includes not only cases where it is "directly on" the other part, but also cases where there are other parts in between. Conversely, when we say that a part is "directly on" another part, we mean that there are no other parts in between. Furthermore, saying that a part is "on" or "over" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "above" or "over" the reference part in the opposite direction of gravity.

[0046] Additionally, throughout the specification, whenever a part is said to "include" a component, this does not mean that it excludes other components, but rather that it may include other components, unless otherwise specifically stated.

[0047] Additionally, throughout the specification, when we say "in plan", we mean when the target portion is viewed from above, and when we say "in cross section", we mean when the target portion is viewed from the side in a cross-section cut vertically.

[0048] Additionally, while the first and second terms used in this application may be used to describe various components, the components should not be limited by the terms. The terms are used solely to distinguish one component from another.

[0049] In addition, in the present application, the upper and lower may be defined as meaning the z-axis direction and the -z-axis direction, respectively, the side as meaning the x-axis direction and the -x-axis direction, and the front and rear as meaning the y-axis direction and the -y-axis direction, respectively, but these are arbitrarily defined within the specification for convenience, and the scope of rights is not limited to these names.

[0050]

[0051] Fig. 3 is a perspective view of a battery module according to one embodiment of the present invention. Fig. 4 is an exploded perspective view of a battery module and a heat sink positioned at the bottom of the battery module according to one embodiment of the present invention.

[0052] Referring to FIGS. 3 and 4, a battery module (100) according to one 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 accommodates the battery cell stack (120), a bus bar assembly (300) positioned on the front (y-axis direction) and / or the rear (-y-axis direction) of the battery cell stack (120), and an end plate (400) that covers the front (y-axis direction) and / or the rear (-y-axis direction) of the battery cell stack (120).

[0053] First, the battery cell (110) may be a pouch-shaped battery cell. Such a pouch-shaped 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-shaped structure.

[0054] These battery cells (110) may be configured in multiple numbers, and the multiple 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 illustrated in FIG. 4, the multiple battery cells (110) may be stacked along a direction parallel to the x-axis.

[0055] The module frame (200) that houses the battery cell stack (120) may include a U-shaped frame (210) and an upper cover (220).

[0056] 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 (-z-axis direction) of the battery cell stack (120), and the side portions (211) may cover both side surfaces (x-axis direction and -x-axis direction) of the battery cell stack (120).

[0057] The bottom portion (210a) may include a plurality of holes (215) penetrating the bottom portion (210a) in the vertical direction (z-axis direction and -z-axis direction). A filling member (250) may be positioned in the plurality of holes (215). More detailed information about the filling member (250) will be described later with reference to FIG. 5.

[0058] The upper cover (220) may be formed as a single plate-like structure that covers the upper surface (z-axis direction) except for the lower surface and both side surfaces that are covered 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 corner portions in contact, thereby forming a structure that covers the battery cell stack (120) in the upper, lower, left, and right directions. Accordingly, the battery cell stack (120) may 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) may include a metal material having a predetermined strength.

[0059] Meanwhile, although not specifically illustrated, the module frame (200) according to the modified example may be a mono-frame in the form of a metal plate in which the upper surface, lower surface, and both side surfaces are integrated. That is, rather than a structure in which the U-shaped frame (210) and the upper cover (220) are mutually coupled, it may be a structure manufactured by extrusion molding in which the upper surface, lower surface, and both side surfaces are integrated. In addition, the structure of the module frame (200) may be provided as an L-shaped frame structure in addition to a mono-frame or a U-shaped frame, and may also be provided as various structures not described in the above-described example.

[0060] The busbar assembly (300) may be positioned on one side of the battery cell stack (120) to cover one side of the battery cell stack (120) and simultaneously guide the connection between the battery cell stack (120) and an external device. Specifically, the busbar assembly (300) may be positioned on the front side (y-axis direction) or the rear side (-y-axis direction) of the battery cell stack (120).

[0061] 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) may include an electrically insulating material. The busbar frame (310) may limit contact between the busbar (320) and other portions of the battery cells (110) other than the portion where the busbar is connected to the electrode lead protruding from the battery cell (110), thereby preventing electrical short circuits from occurring.

[0062] The end plate (400) may be used to seal the open surface of the module frame (200) to protect the battery cell stack (120) and electrical components connected thereto from external physical impact. To this end, the end plate (400) may be manufactured from a material having a predetermined strength. For example, the end plate (400) may include a metal such as aluminum.

[0063] Specifically, the end plate (400) may be coupled (bonded, sealed, or hermetically sealed) to the module frame (200) while covering the busbar assembly (300) positioned on one surface 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 a method such as welding. In addition, although not shown, an insulating cover for electrical insulation may be additionally positioned between the end plate (400) and the busbar assembly (300).

[0064] The heat sink (500) is positioned below the bottom portion (210a) of the module frame (200) and may include a lower heat sink (510) and an upper heat sink (520) positioned and stacked on the lower heat sink (510).

[0065] In this case, the lower heat sink (510) includes a protrusion (515) protruding toward the upper heat sink (520), and the protrusion (515) can be positioned to 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) can be a flow path for the refrigerant to flow. The upper heat sink (520) can be positioned to face the bottom portion (210a) of the module frame (200).

[0066] The heat sink (500) may be made of aluminum (Al) and may include a flow path through which a coolant may flow. However, the present invention is not limited thereto, and any material having cooling performance capable of sufficiently cooling the heat generated from the battery module (100) may be used.

[0067] In this drawing, the heat sink (500) is illustrated as a configuration in which it is positioned individually or independently, but is not limited thereto. For example, the heat sink (500) may be configured to be integrated with the battery module (100). Specifically, the bottom portion (210a) of the module frame (200) constitutes the upper plate of the lower heat sink (510), and the protrusion (515) of the lower heat sink (510) and the bottom portion (210a) may be positioned in contact with each other to form a coolant flow path.

[0068] Hereinafter, the characteristics of the bottom portion (210a) and the filling member (250) of the module frame (200) according to one embodiment of the present invention and the relationship therebetween will be described in more detail.

[0069]

[0070] Figure 5 is a perspective view of Figure 3 viewed from the -z-axis direction.

[0071] Referring to FIG. 5, the bottom portion (210a) of the U-shaped frame (210) according to one embodiment of the present invention may be provided with a plurality of holes (215) and a filling member (250) filled between the holes (215).

[0072] Specifically, the bottom portion (210a) of the U-shaped frame (210) may be provided with a plurality of holes (215) penetrating the bottom portion (210a). More specifically, the plurality of holes (215) may be provided while penetrating the bottom portion (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 positioned while being filled with a filling member (250).

[0073] The filling member (250) can be positioned by being filled between a plurality of holes (215).

[0074] In this case, the module frame (200) and the filling member (250) may be formed of different materials. Specifically, the module frame (200) and the filling member (250) may be different metals. More specifically, the filling member (250) may include a material having a higher thermal conductivity than the module frame (200) of the present invention.

[0075] In other words, the module frame (200) according to the present invention may include a material having lower thermal conductivity than the material constituting a conventional module frame, and may include a material having lower thermal conductivity than the filling member (250). In contrast, the filling member (250) may include a material having higher thermal conductivity than the module frame (200).

[0076] For example, the module frame (200) according to the present invention may include materials such as SUS and steel. Therefore, the module frame (200) according to the present invention may include a material that has high rigidity and thus high structural safety, but does not easily conduct heat. On the other hand, the filling member (250) may include a material with higher thermal conductivity than the module frame (200), that is, a metal with high thermal conductivity. For example, the filling member (250) may include a metal with high thermal conductivity, such as copper (Cu) or aluminum (Al).

[0077] When comparing the exemplary materials listed above, the module frame (200) may include a material having a thermal conductivity of about 20 W / mK, and the filling member (250) may include a material having a thermal conductivity of 200 W / mK or more.

[0078] When heat is generated from the battery cell (110) and moves to the bottom part (210a), due to the difference in material and thermal conductivity between the module frame (200) and the filling member (250), the heat may move in the height direction (z-axis direction) of the bottom part (210a) rather than in the width direction (x-axis direction) and length direction (y-axis direction) of the bottom part (210a). That is, when the heat generated from the battery cell (110) moves to the bottom part (210a), the movement in the xy direction of the bottom part (210a) where neighboring battery cells (110) are located may be reduced, and the movement in the z-axis direction in contact with the heat sink may be more promoted.

[0079] Accordingly, heat generated from one battery cell (110) can be prevented from moving to another neighboring battery cell (110) along the bottom (210a) of the module frame (200), thereby reducing heat transfer and improving the safety of the battery.

[0080] 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 part (210a) of the U-shaped frame (210), so that the cooling performance of the battery can be improved.

[0081]

[0082] Fig. 6 is a cross-sectional view showing a battery module and a heat sink along line B-B' of Fig. 3. Fig. 7 is an enlarged cross-sectional view showing a portion of area A2 and a heat sink of Fig. 6.

[0083] Referring to FIGS. 6 and 7, a battery module (100) according to one embodiment of the present invention can be mounted and positioned on a heat sink (500) constituting a battery pack.

[0084] In the battery module (100), a thermally conductive resin layer (270) may be provided between a battery cell stack (120) in which a plurality of battery cells (110) are stacked and a bottom portion (210a) of a module frame (200). The thermally conductive resin layer (270) may be a thermal resin, and may fix and adhere the module frame (200) and the battery cell stack (120). In addition, due to the thermally conductive resin layer (270), heat generated from the battery cells (110) may be transferred to the bottom portion (210a) of the module frame (200).

[0085] The battery module (100) can be mounted with its bottom portion (210a) facing the heat sink (500). In this case, the battery module (100) can be mounted on the heat sink (500) via a heat transfer member (280). That is, the heat transfer member (280) can be positioned so as 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 positioned so as to be in contact with the bottom portion (210a) of the module frame (200) and one surface of the heat sink (500), thereby transferring heat generated from the battery cell (110) to the outside via the heat sink (500).

[0086] Looking at the heat flow in more detail in FIG. 7, the heat generated from the battery cell (110) can move toward the heat sink (500). Specifically, the heat generated from the battery cell (110) can sequentially move to the filling member (250) and the heat sink (500) and be discharged to the outside. More specifically, the heat generated from the battery cell (110) can move to the bottom part (210a) of the module frame through the thermally conductive resin layer (270). In this case, the heat generated from the battery cell (110) can move to the heat sink (500) through the filling member (250) which has a higher thermal conductivity than the bottom part (210a) of the module frame. That is, the heat generated from the battery cell (110) can move in the first direction (D1), which is a vertical direction (z-axis direction) with respect to the bottom portion (210a) through the filling member (250), and may not move in the horizontal direction (x-axis direction or y-axis direction) through the bottom portion (210a) of the module frame.

[0087] Thereafter, the heat passing through the filling member (250) can be transferred to the heat sink (500) through the heat transfer member (280). The heat reaching 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 passage formed in the heat sink (500).

[0088] To summarize, heat generated from the battery cell (110) can be discharged to the outside while sequentially moving 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).

[0089] That is, the heat generated from the battery cell (110) moves in the first direction (D1) along the filling member (250) which has relatively higher thermal conductivity than the bottom portion (210a) of the module frame. In this case, the heat generated from the battery cell (110) can move only in the first direction (D1) rather than in the second direction (D2) within the module frame (200) due to the difference in materials and thermal conductivity between the module frame (200) and the filling member (250). That is, by positioning the filling member (250) in the plurality of holes (215) provided in the bottom portion (210a) of the module frame, it is possible to prevent the heat generated from one battery cell (110) from moving to another neighboring battery cell (110) along the bottom portion (210a) of the module frame (200). Therefore, heat propagation through the module frame can be reduced and the safety of the battery can be improved.

[0090] In addition, since heat generated from one battery cell (110) moves more easily in the first direction (D1), which is a vertical direction, than in the second direction (D2), which is a horizontal direction, it may be easier to move to the heat sink (500) in contact with the bottom portion (210a) of the module frame and then be discharged to the outside, compared to the past. Accordingly, the cooling performance of the battery may be improved.

[0091]

[0092] Figure 8 is a top view showing a bottom portion according to another embodiment of the present invention.

[0093] Since the content described in Fig. 8 corresponds to a modified example of the present invention, the description of the same content as the configuration described above will be omitted.

[0094] Referring to FIG. 8, the bottom part (210a) of the module frame constituting the battery module (100') according to another embodiment of the present invention may further include an insulating member (251) in addition to a plurality of holes (215) and a filling member (250).

[0095] The insulating member (251) may be positioned between a plurality of holes (215) and a filling member (250). In this case, the outer surface of the insulating member (251) may be positioned in contact with the holes (215) and the filling member (250). Specifically, one surface of the insulating member (251) may be positioned in contact with the plurality of holes (215), and the other surface of the insulating member (251) may be positioned in contact with the filling member (250). In this case, one surface of the insulating member (251) in contact with the holes (215) may be defined as the outer surface of the insulating member (251), and one surface of the insulating member (251) in contact with the filling member (250) may be defined as the inner surface of the insulating member (251). The insulating member (251) may have a ring shape that is in contact with a plurality of holes (215) and a filling member (250).

[0096] The insulating member (251) may include an insulating material. Additionally, the insulating member (251) may also include an insulating material. For example, the insulating member (251) may include a plastic material such as polyethylene (PE), polypropylene (PP), or a rubber material.

[0097] This insulating member (251) can improve the insulation and insulating capabilities between the bottom portion (210a) and the filling member (250) by being positioned between them, which have a plurality of holes (215). Specifically, when heat generated from the battery cell is transferred to the bottom portion (210a) and the filling member (250), the insulating member (251) can allow the heat to move only in the vertical direction (z-axis direction) of the bottom portion (210a) and the filling member (250), and can prevent the heat from moving in the planar direction (xy-axis direction). That is, the insulating member (251) may include an insulating material, and thus prevent the heat from moving in the planar direction of the bottom portion (210a) and the filling member (250), and encourage movement in the vertical direction.

[0098] In summary, a battery module (100') according to another embodiment of the present invention further includes an insulating member (251), thereby facilitating heat generated from the battery cells to move more easily in the vertical direction along the filling member (250), which has a relatively high thermal conductivity compared to the bottom portion (210a). Accordingly, since heat generated from the battery cells can be easily discharged to the outside along the heat sink, cooling performance and safety can be improved compared to conventional battery modules.

[0099] The battery module and battery pack containing the battery module described above can be applied to various devices. These devices include, but are not limited to, means of transportation such as electric bicycles, electric vehicles, and hybrid vehicles. However, the present invention is not limited thereto and can be applied to various devices that can utilize the battery module and battery pack containing the battery module, which also fall within the scope of the present invention.

[0100] 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 following claims also fall within the scope of the present invention.

[0101] Description of the symbol

[0102] 100, 100': Battery module

[0103] 110: Battery cell

[0104] 120: Battery cell stack

[0105] 200: Module Frame

[0106] 210: U-shaped frame

[0107] 210a: Floor

[0108] 215: Hall

[0109] 220: Top cover

[0110] 250: Filling member

[0111] 251: Insulating member

[0112] 270: Thermally conductive resin layer

[0113] 280: Heat transfer member

[0114] 300: Busbar assembly

[0115] 400: End Plate

[0116] 500: Heat sink

Claims

1. A battery cell stack having multiple battery cells stacked on top of each other; and It includes a module frame that accommodates the above battery cell stack, The bottom of the above module frame includes a plurality of holes, A battery module having a plurality of holes provided with a filling member.

2. In paragraph 1, A battery module in which the above module frame and the above filling member are made of different materials.

3. In paragraph 2, The above module frame includes a material having lower thermal conductivity than the above filling member, A battery module in which the above-mentioned filling member includes a material having a higher thermal conductivity than the above-mentioned module frame.

4. In paragraph 2, The above module frame comprises SUS or steel, The above-mentioned filling member is a battery module containing copper (Cu) or aluminum (Al).

5. In paragraph 1, A battery module in which the plurality of holes are formed by penetrating in the height direction of the bottom portion.

6. In paragraph 1, A battery module further comprising an insulating member positioned between the plurality of holes and the filling member.

7. In paragraph 6, The above insulating member is a battery module positioned in contact with the plurality of holes and the filling member.

8. In paragraph 6, A battery module in which the above insulating member includes a ring shape.

9. In paragraph 6, The above insulating member is a battery module including an insulating material.

10. In paragraph 9, The above insulating material is a battery module including a plastic material including polyethylene (PE) or polypropylene (PP) or a rubber material.

11. Battery module according to paragraph 1; and A battery pack comprising a heat sink positioned in contact with the bottom of the battery module.

12. In paragraph 11, A battery pack in which heat generated from the above battery cell is discharged to the outside while sequentially moving from the above battery cell to the above filling member and the above heat sink.

13. In paragraph 12, A battery pack in which heat generated from the above battery cell is discharged to the outside while moving in a first direction that is perpendicular to the bottom portion.

14. In paragraph 11, A thermally conductive resin layer is provided between the battery cell stack and the bottom of the module frame, A battery pack having a heat transfer member provided between the bottom of the module frame and the heat sink.

15. In paragraph 14, A battery pack in which heat generated in the battery cell is discharged to the outside while sequentially moving from the battery cell to the thermally conductive resin layer, the filling member, the heat transfer member, and the heat sink.

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