Battery module with improved insulation

Abstract

The present invention provides a battery module structure comprising: battery cells; a housing for receiving the battery cells therein; a cover forming one side surface of the housing and provided with first holes enabling the inside and the outside of the housing to communicate; an insulating sheet provided between the battery cells and the cover, and provided with second holes corresponding to the first holes; and hole insulating parts covering at least a portion of the inner circumferential surfaces of the first holes.

Description

Battery modules with improved insulation

[0001] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2023-0175980, dated December 6, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a battery module having improved insulation in a battery module that incorporates battery cells. More specifically, the present invention relates to a battery module structure comprising a housing having venting holes for gas venting and battery cells incorporated therein, wherein the battery module has improved electrical insulation between the housing and the battery cells.

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

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

[0005] Since it is desirable to manufacture medium- to large-sized battery modules with as small a size and weight as possible, square batteries and pouch-type batteries that can be stacked with high integration and have a small weight per capacity are mainly used as battery cells for medium- to large-sized battery modules.

[0006] Figures 1 and 2 illustrate a battery module having a venting hole. Referring to these drawings, a battery module (M) typically includes a battery cell (1) and a housing (2) that accommodates the battery cell, and the housing (2) may include a cover (20) constituting one side thereof so as to be opened and closed before and after accommodating the battery cell (1).

[0007] A battery cell (1) may generate heat or gas during normal or charging / discharging operations, and may also release high-temperature and high-pressure gas in the event of thermal runaway due to a short circuit or the like. In this case, a structure in which a venting hole (200) is provided in the cover (20) to discharge gas or flames in order to prevent the housing (2) from exploding due to excessive internal pressure is widely known.

[0008] Meanwhile, since the cover (20) is often made of a conductive metal material, insulation between the battery cell (1) and the cover (20) is often necessary to prevent an accident due to a short circuit of the battery cell (1). For this purpose, the battery module (M) may include an insulating sheet (30) provided between the cover (20) and the battery cell (1).

[0009] Figures 3 and 4 illustrate cross-sections of the battery module of Figure 1. Referring to these drawings, the insulating sheet (30) is attached to the inner surface of the cover (20). A venting hole (300) corresponding to the venting hole (200) of the cover (20) is provided in the insulating sheet (30) to discharge gas or flame.

[0010] Fig. 5 shows the insulation distance in the battery module of Fig. 1. Referring to this, since the insulation sheet (30) is only attached to the inner surface of the cover (20), the inner circumferential surface of the venting hole (200) of the cover (20) is left with the metal portion exposed. Accordingly, unlike in the case where the venting hole (300) is not provided in the insulation sheet (30), the insulation distance (d) between the battery cell (1) and the cover (20) becomes very short, and the risk of a short circuit is high.

[0011] The present invention was created against the background of the above-described prior art, and its purpose is to provide a structure for a battery module in which insulation between battery cells and a housing housing the same is improved. In particular, the present invention seeks to provide a structure for a battery module in which the insulation distance between the battery cells and a housing in which venting holes for gas and flame discharge are provided is increased.

[0012] Another technical challenge of the present invention is to provide a battery module structure that is simple to manufacture and economical, in which the risk of short circuit between the exposed metal part of the venting hole and the battery cell is minimized without blocking the venting hole to allow smooth discharge of gas.

[0013] The technical objectives of the present invention are not limited to the purposes mentioned above. Other objectives and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through the embodiments of the present invention. Furthermore, it will be readily apparent that the objectives and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0014] In order to solve the above problem, the present invention provides a structure of a battery module including: a battery cell; a housing that accommodates the battery cell; a cover that forms one side of the housing and has a first hole that connects the inside and the outside of the housing; an insulating sheet that is provided between the battery cell and the cover and has a second hole corresponding to the first hole; and a hole insulating portion that covers at least a portion of the inner circumferential surface of the first hole.

[0015] According to the present invention, a structure of a battery module is provided in which the risk of a short circuit that may increase as the insulating sheet has the second hole is reduced by covering the inner circumferential surface of the first hole with the hole insulating portion.

[0016] The insulating sheet may be attached to the inner surface of the cover. However, it is sufficient if the insulating sheet is provided between the battery cell and the cover to insulate the two, and it is not necessarily required to be attached to the cover.

[0017] The housing may include a frame with an open top. In this case, the cover may be a top cover that covers the upper portion of the frame. Although a hole for gas discharge is typically provided in the top cover of a battery module, the structure and arrangement of the housing and the cover may differ from this.

[0018] It is preferable that the first hole and the hole insulation portion are provided in multiple numbers.

[0019]

[0020] According to a first embodiment of the present invention, the hole insulation portion may be formed by the insulating sheet extending from the inner periphery of the second hole. For example, the hole insulation portion may be formed by the insulating sheet being plastically deformed to fit the first hole.

[0021] It is preferable that the hole insulation cover the entire circumferential section of at least a portion of the thickness direction of the first hole. More preferably, the hole insulation can cover the entire inner circumferential surface of the first hole. Accordingly, the insulation distance between the battery cell and the cover can be increased at least by the thickness of the cover.

[0022] The hole insulation portion may include an overhang portion whose leading end extends radially inward. When the hole insulation portion is provided along the entire circumferential section of the first hole, the overhang portion may also be provided along the entire circumferential section. In this case, the overhang portion may have a shape in which the outer end of the hole insulation portion is bent radially inward. The overhang portion may extend so as to cross the path from the battery cell to the exposed portion of the cover, thereby further increasing the insulation distance between the battery cell and the cover.

[0023] The hole insulation portion may include an outer cover portion extending radially outward from the outer side of the cover. The outer cover portion is preferably provided along the entire circumferential section. The outer cover portion covers a portion of the outer surface of the cover connected to the outer end of the first hole, thereby further increasing the insulation distance between the battery cell and the cover.

[0024]

[0025] According to a second embodiment of the present invention, the hole insulation part may be provided on a hole insulation member mounted in the first hole.

[0026] The above hole insulation can cover the entire inner circumference of the first hole. Accordingly, the insulation distance between the battery cell and the cover can be increased by at least the thickness of the cover.

[0027] The hole insulating member may overlap the insulating sheet in the radial direction. Alternatively, the hole insulating member may overlap the insulating sheet in the normal direction of the cover on the inner side of the cover. This can prevent the battery cell from short-circuiting with the inner surface of the cover exposed through the gap between the insulating sheet and the hole insulating member.

[0028] For example, the hole insulating member may include an inner cover portion extending radially outward from the inside of the cover. The inner cover portion is preferably provided along the entire circumferential section. The inner cover portion interferes with the inner surface of the cover to prevent the hole insulating member from falling out of the cover through the first hole, and at the same time, overlaps with the insulating sheet to prevent a short circuit between the inner surface of the cover and the battery cell.

[0029] The hole insulating member may include an outer cover portion extending radially outward from the outer side of the cover. The outer cover portion is preferably provided along the entire circumferential section. The outer cover portion covers a portion of the outer surface of the cover connected to the outer end of the first hole, thereby increasing the insulation distance between the battery cell and the cover. In addition, the outer cover portion may interfere with the outer surface of the cover, thereby preventing the hole insulating member from falling into the cover through the first hole.

[0030] According to a second embodiment of the present invention, the hole insulating member can be fixed to the first hole so as not to flow in the thickness direction by having the inner cover part and the outer cover part.

[0031]

[0032] The present invention also provides a battery pack having the battery module built in and a structure of a vehicle having the battery pack built in.

[0033] The above battery modules may be integrated into a battery pack in multiple units to increase capacity and / or voltage. The battery pack may include a venting device capable of discharging gases and flames emitted when the battery module ignites to the outside. The battery pack may be incorporated into a vehicle as a power source. The vehicle may include an electric vehicle, a hybrid vehicle, and the like.

[0034] The present invention can provide a structure of a battery module in which insulation is improved and the risk of short circuit is minimized.

[0035] Specifically, the present invention can provide a structure of a battery module having a venting hole for gas and flame discharge, in which the insulating distance between the battery cell and the housing is increased by an insulating hole insulation part covering the inner circumferential surface of the venting hole.

[0036] Another advantage of the present invention is that it can provide a structure of a battery module that is economical because it can be manufactured by a simple method such as plastic deformation of an insulating synthetic resin film while minimizing the risk of accidents by improving the insulating performance and does not require many additional materials or complex configurations.

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

[0038] Figures 1 and 2 illustrate a battery module having a venting hole.

[0039] Figures 3 and 4 show cross-sections of the battery module of Figure 1.

[0040] Figure 5 shows the insulation distance in the battery module of Figure 1.

[0041] Figures 6 and 7 illustrate a battery module according to a first embodiment of the present invention.

[0042] Fig. 8 shows an insulating sheet according to a first embodiment of the present invention.

[0043] Figure 9 shows a cover and insulating sheet according to the first embodiment of the present invention.

[0044] Figures 10 and 11 show cross-sections of a battery module according to a first embodiment of the present invention.

[0045] Figure 12 shows the insulation distance in a battery module according to the first embodiment of the present invention.

[0046] Figures 13 and 14 illustrate a battery module according to a second embodiment of the present invention.

[0047] Fig. 15 shows a hole insulating member according to a second embodiment of the present invention.

[0048] Fig. 16 shows a cover, an insulating sheet, and a hole insulating member according to a second embodiment of the present invention.

[0049] Figures 17 and 18 show cross-sections of a battery module according to a second embodiment of the present invention.

[0050] Figure 19 shows the insulation distance in a battery module according to the second embodiment of the present invention.

[0051] FIGS. 20 and 21 illustrate a battery pack including a battery module according to one embodiment of the present invention and a vehicle including the battery pack.

[0052] [Explanation of symbols]

[0053] 1: Battery cell

[0054] 2: Housing

[0055] 20: Cover

[0056] 200: Hole 1 (Benting Hole)

[0057] 21: Frame

[0058] 30: Insulating sheet

[0059] 300: Hole 2

[0060] 31: Hole insulation (hole insulation member)

[0061] 311: Overhang

[0062] 312: Inner cover

[0063] 313: Outer cover

[0064] d: insulation distance

[0065] M: Battery module

[0066] P: Battery pack

[0067] V: Car

[0068] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical idea of ​​the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0069] Although the terms "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used solely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

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

[0071] Hereinafter, the phrase "any configuration is placed on (or below)" a component or "on (or below)" a component may mean that any configuration is placed in contact with the upper surface (or lower surface) of said component, and that other configurations may be interposed between said component and any configuration placed on (or below) said component.

[0072] Additionally, when it is described that a component is "connected," "coupled," or "connected" to another component, it should be understood that the components may be directly connected or connected to one another, but that other components may also be "interposed" between the components, or that each component may be "connected," "coupled," or "connected" through another component.

[0073] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0074] Throughout the specification, when we refer to "A and / or B", this means A, B, or A and B, unless otherwise stated, and when we refer to "C to D", this means C or more and D or less, unless otherwise stated.

[0075] Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0076]

[0077] [First embodiment - Battery module having an extended insulating sheet]

[0078] Hereinafter, with reference to FIGS. 6 to 12, a battery module and its insulating structure according to a first embodiment of the present invention will be described in detail.

[0079] Figures 6 and 7 illustrate a battery module according to a first embodiment of the present invention. Referring to these drawings, a battery module (M) according to the present embodiment may include a battery cell (1) and a housing (2) that accommodates the battery cell.

[0080] The above battery cell (1) may be a pouch-type battery cell including a pouch of metal foil, and may be a cell laminate in which a plurality of cells are laminated in the width direction, but its structure is not particularly limited.

[0081] The housing (2) may include a cover (20) constituting one side thereof. According to the present embodiment, the housing (2) may include a frame (21) with an open upper side and a cover (20) covering the upper side thereof.

[0082] The above housing (2), particularly the cover (20), may include a conductive metal material.

[0083] The cover (20) may be provided with a first hole (200) for discharging gas generated from the battery cell (1) to the outside of the housing (2). A plurality of the first holes (200) may be provided.

[0084] An insulating sheet (30) may be provided between the battery cell (1) and the cover (20) to electrically insulate them. The insulating sheet (30) may be attached to, for example, the inner surface of the cover (20).

[0085] Fig. 8 illustrates an insulating sheet according to a first embodiment of the present invention, and Fig. 9 illustrates a cover and insulating sheet according to the first embodiment of the present invention. Referring to these drawings, the insulating sheet (30) may be provided with a second hole (300) corresponding to the first hole (200).

[0086] At this time, if the inner surface of the first hole (200) is exposed without being covered by the insulating sheet (30), there is an increased risk of a short circuit occurring between the exposed inner surface of the first hole (200) and the battery cell (1). To prevent this, the battery module (M) may include a hole insulating portion (31) that covers at least a portion of the inner surface of the first hole (200).

[0087] According to the present embodiment, the hole insulation portion (31) may extend from the insulation sheet (30). For example, the hole insulation portion (31) may have a shape in which the insulation sheet (30) extends from the outer periphery of the second hole (300). The hole insulation portion (31) according to the present embodiment may be formed, for example, by the insulation sheet (30) being stretched and plastically deformed.

[0088] It is preferable that the hole insulation portion (31) be provided along the entire circumferential section of the inner surface of the first hole (200). More preferably, the hole insulation portion (31) can cover the entire inner surface of the first hole (200). Accordingly, the insulation distance between the battery cell (1) and the cover (20) can be increased at least by the thickness of the cover (20).

[0089] Figures 10 and 11 illustrate cross-sections of a battery module according to a first embodiment of the present invention. Referring to these drawings, the hole insulation portion (31) may include an overhang portion (311) whose leading end extends radially inward. The overhang portion (311) may be provided along the entire circumferential section. According to the present embodiment, the overhang portion (311) may have a shape in which the upper end of the hole insulation portion (31) is radially recessed inward.

[0090] Fig. 12 illustrates an insulation distance in a battery module according to a first embodiment of the present invention. Referring to this, the battery module (M) according to the present embodiment can have a large insulation distance (d) by including the hole insulation portion (31) that covers most of the inner surface of the first hole (200) and the overhang portion (311) that extends radially inwardly of the first hole (200).

[0091] At this time, the overhang portion (311) may extend across the path from the battery cell (1) to the exposed portion of the cover (20), thereby further increasing the insulation distance (d).

[0092] In a variation, the hole insulation portion (31) may include an outer cover portion (not shown) extending radially outward from the outer side of the cover (20). The outer cover portion is preferably provided along the entire circumferential section. For example, the outer cover portion may cover a portion of the outer surface of the cover (20) connected to the outer end of the first hole (200), thereby further increasing the insulation distance. In addition, the outer cover portion may fix the insulating sheet (30) to the cover (20) by interfering with the outer surface of the cover (20).

[0093]

[0094] [Second Embodiment - Battery Module Having a Hole Insulating Member]

[0095] Hereinafter, with reference to FIGS. 13 to 19, a battery module and its insulation structure according to a first embodiment of the present invention will be described in detail.

[0096] Figures 13 and 14 illustrate a battery module according to a second embodiment of the present invention. Referring to these drawings, a battery module (M) according to the present embodiment may include a battery cell (1) and a housing (2) that accommodates the battery cell.

[0097] The above battery cell (1) may be a pouch-type battery cell including a pouch of metal foil, and may be a cell laminate in which a plurality of cells are laminated in the width direction, but its structure is not particularly limited.

[0098] The housing (2) may include a cover (20) constituting one side thereof. According to the present embodiment, the housing (2) may include a frame (21) with an open upper side and a cover (20) covering the upper side thereof.

[0099] The above housing (2), particularly the cover (20), may include a conductive metal material.

[0100] The cover (20) may be provided with a first hole (200) for discharging gas generated from the battery cell (1) to the outside of the housing (2). A plurality of the first holes (200) may be provided.

[0101] An insulating sheet (30) may be provided between the battery cell (1) and the cover (20) to electrically insulate them. The insulating sheet (30) may be attached to, for example, the inner surface of the cover (20).

[0102] Fig. 15 illustrates a hole insulating member according to a second embodiment of the present invention, and Fig. 16 illustrates a cover, an insulating sheet, and a hole insulating member according to a second embodiment of the present invention. Referring to these drawings, a second hole (300) corresponding to the first hole (200) may be provided in the insulating sheet (30).

[0103] At this time, if the inner surface of the first hole (200) is exposed without being covered by the insulating sheet (30), there is an increased risk of a short circuit occurring between the exposed inner surface of the first hole (200) and the battery cell (1). To prevent this, the battery module (M) may include a hole insulating portion (31) that covers at least a portion of the inner surface of the first hole (200).

[0104] It is preferable that the hole insulation portion (31) be provided along the entire circumferential section of the inner surface of the first hole (200). More preferably, the hole insulation portion (31) can cover the entire inner surface of the first hole (200). Accordingly, the insulation distance between the battery cell (1) and the cover (20) can be increased at least by the thickness of the cover (20).

[0105] According to the present embodiment, the hole insulation part (31) may be provided on a hole insulation member (31) fixed to the first hole (200). According to the present embodiment, the hole insulation part (31) may be the hole insulation member (31) itself. For example, the hole insulation part (31) according to the present embodiment may be an annular member fitted to the inner circumferential surface of the first hole (200).

[0106] Figures 17 and 18 illustrate cross-sections of a battery module according to a second embodiment of the present invention. Referring to these drawings, the hole insulating member (31) can overlap with the insulating sheet (30).

[0107] Specifically, the hole insulating member (31) may overlap the insulating sheet (30) in the radial direction. Alternatively, the hole insulating member (31) may overlap the insulating sheet (30) on the inner side of the cover (20) in the normal direction of the cover (20). As a result, the battery cell (1) can be prevented from causing a short circuit with the inner surface of the cover (20) exposed through the gap between the insulating sheet (30) and the hole insulating member (31).

[0108] For example, the hole insulating member (31) may include an inner cover portion (312) extending radially outward from the inside of the cover (20). It is preferable that the inner cover portion (312) be provided along the entire circumferential section. The inner cover portion (312) interferes with the inner surface of the cover (20) to prevent the hole insulating member (31) from falling out of the cover (20) through the first hole (200), and at the same time, by overlapping with the insulating sheet (30), it can prevent a short circuit between the inner surface of the cover (20) and the battery cell (1).

[0109] The hole insulating member (31) may include an outer cover portion (313) extending radially outward from the outer side of the cover (20). The outer cover portion (313) is preferably provided along the entire circumferential section. The outer cover portion (313) covers a portion of the outer surface of the cover (20) connected to the outer end of the first hole (200), thereby increasing the insulation distance between the battery cell (1) and the cover (20). In addition, the outer cover portion (313) may interfere with the outer surface of the cover (20) to prevent the hole insulating member (31) from falling into the cover (20) through the first hole (200).

[0110] The inner cover portion (312) and / or the outer cover portion (313) may be formed by plastically deforming the end portion of the annular hole insulating member (31) by stretching it so that it spreads outward.

[0111] According to the second embodiment of the present invention, the hole insulating member (31) can be fixed to the first hole so as not to flow in the thickness direction by having the inner cover part (312) and the outer cover part (313).

[0112] Fig. 19 shows an insulation distance in a battery module according to a second embodiment of the present invention. Referring to this, the battery module (M) according to the present embodiment can have a large insulation distance (d) by including the hole insulation member (31) that covers most of the inner circumferential surface of the first hole (200) and includes the inner cover portion (312) and / or the outer cover portion (313).

[0113] At this time, the inner cover part (312) and the outer cover part (313) interfere with the cover (20) to fix the hole insulating member (31) so that it does not fall out to the outside and / or inside of the cover (20), and at the same time, it can extend along the path from the battery cell (1) to the exposed portion of the cover (20), thereby increasing the insulating distance (d).

[0114]

[0115] [Battery pack and vehicle structure]

[0116] Hereinafter, with reference to FIGS. 20 and 21, a structure of a battery pack including a battery module according to one embodiment of the present invention and a vehicle including the battery pack will be described.

[0117] The battery module built into the battery pack according to the present embodiment may be the battery module (M) according to the first embodiment and the second embodiment, or any battery module according to the present invention.

[0118] FIGS. 20 and 21 illustrate a battery pack including a battery module according to an embodiment of the present invention and a vehicle including the battery pack. Referring to these drawings, a plurality of battery modules (M) may be integrated to form a battery pack (P) in order to increase the capacity and / or voltage thereof. The battery pack (P) may include a venting device capable of discharging gases and flames emitted when the battery module (M) ignites to the outside. The battery pack (P) may be built into a vehicle (V) as a power source. The vehicle (V) may include an electric vehicle, a hybrid vehicle, etc.

[0119]

[0120] It should be understood that the above-described embodiments are illustrative in all respects and not restrictive, and the scope of the present invention will be determined by the claims that follow, rather than by the detailed description set forth above. Furthermore, the meaning and scope of the claims that follow, as well as all possible modifications and variations derived from their equivalent concepts, should be construed as encompassing the scope of the present invention.

[0121] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. Battery cell; A housing accommodating the battery cell; A cover forming one side of the housing and having a first hole connecting the inside and the outside of the housing; An insulating sheet provided between the battery cell and the cover, and having a second hole corresponding to the first hole; and A battery module, comprising a hole insulation member covering at least a portion of the inner surface of the first hole.

2. In claim 1, A battery module, wherein the insulating sheet is attached to the inner surface of the cover.

3. In claim 1, The above housing comprises a frame with an open upper portion, The above cover is a battery module that covers the upper part of the frame.

4. In claim 1, A battery module, wherein the first hole and the hole insulation part are provided in plurality.

5. In claim 1, A battery module, wherein the above hole insulation portion is formed by the insulating sheet extending from the inner circumference of the second hole.

6. In claim 5, A battery module, wherein the above hole insulation covers the entire circumferential section of at least a portion of the thickness direction of the first hole.

7. In claim 6, A battery module in which the above hole insulation covers the entire inner surface of the first hole.

8. In claim 5, A battery module, wherein the hole insulation portion includes an overhang portion whose leading end extends radially inward.

9. In claim 8, A battery module in which the above overhang is provided along the entire circumferential section.

10. In claim 5, A battery module, wherein the hole insulation portion includes an outer cover portion extending radially outward from the outer side of the cover.

11. In claim 10, A battery module in which the outer cover part is provided along the entire circumferential section.

12. In claim 1, A battery module, wherein the hole insulation part is provided on a hole insulation member mounted in the first hole.

13. In claim 12, A battery module in which the above hole insulation covers the entire inner surface of the first hole.

14. In claim 12, A battery module wherein the above hole insulating member overlaps the above insulating sheet in a radial direction.

15. In claim 12, A battery module, wherein the hole insulating member overlaps the insulating sheet on the inner side of the cover in the normal direction of the cover.

16. In claim 12, A battery module, wherein the hole insulating member includes an inner cover portion extending radially outward from the inner side of the cover.

17. In claim 16, A battery module in which the inner cover portion is provided along the entire circumferential section.

18. In claim 12, A battery module, wherein the hole insulating member includes an outer cover portion extending radially outward from the outer side of the cover.

19. In claim 18, A battery module in which the outer cover part is provided along the entire circumferential section.

20. A battery pack comprising the battery modules of claims 1 to 19.

21. A vehicle comprising the battery pack of claim 20.

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