Battery module with improved insulation

Abstract

The present invention provides a battery module structure comprising: a battery cell; a housing for housing the battery cell; a cover forming one surface of the housing and having a first hole that connects the inside and 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 hole insulating portion that covers at least a part of the inner circumferential surface of the first hole.

Description

Technical Field

[0001] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0175980, filed on December 6, 2023, and the contents disclosed in the documents of the Korean Patent Application are all included as part of this specification.

[0002] The present invention relates to a battery module incorporating battery cells, and more particularly to a battery module having improved insulation. More specifically, the present invention relates to a structure of a battery module including a housing provided with vent holes for venting gas and battery cells housed therein, in which electrical insulation between the housing and the battery cells is improved.

Background Art

[0003] Secondary batteries, which are highly applicable to a variety of products and have electrical characteristics such as high energy density, are widely used not only in portable devices but also in electric vehicles or hybrid vehicles driven by an electric drive source, power storage devices, etc. These secondary batteries are attracting attention as a new energy source not only because of the primary advantage of significantly reducing the use of fossil fuels but also because they produce no by-products from energy use, are environmentally friendly, and improve energy efficiency.

[0004] For small mobile devices, one or two or three battery cells are used per device, while for medium to large-sized devices such as automobiles, high output and large capacity are required. Therefore, medium to large-sized battery modules in which a large number of battery cells are electrically connected are used.

[0005] Medium to large-sized battery modules are preferably manufactured to be as small and light as possible, so prismatic batteries, pouch-type batteries, etc., which can be stacked with high integration and have a small weight-to-capacity ratio, are mainly used as the battery cells of medium to large-sized battery modules.

[0006] Figures 1 and 2 show a battery module with vent holes. Referring to these drawings, the battery module (M) typically comprises a battery cell 1 and a housing 2 that houses it, and the housing 2 may include a cover 20 that forms one side of the housing so that it is opened and closed before and after housing the battery cell 1.

[0007] The battery cell 1 can generate heat and gas during normal operation and during charging and discharging, and can also release high-temperature, high-pressure gas in the event of thermal runaway due to a short circuit or other reasons. In this case, to prevent the housing 2 from exploding due to the large internal pressure, a structure in which vent holes 200 are provided in the cover 20 to release gas and flames is widely known.

[0008] On the other hand, 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 accidents caused by short circuits in the battery cell 1. For this reason, 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 show a cross-section of the battery module in Figure 1. Referring to these drawings, the insulating sheet 30 is attached to the inner surface of the cover 20. The insulating sheet 30 is provided with vent holes 300 that correspond to the vent holes 200 of the cover 20 in order to release gas and flames.

[0010] Figure 5 shows the insulation distance in the battery module of Figure 1. Referring to this, since the insulating sheet 30 is only attached to the inner surface of the cover 20, the inner circumferential surface of the vent hole 200 of the cover 20 is left with the metal part exposed. Therefore, unlike the case where the insulating sheet 30 does not have a vent hole 300, the insulation distance (d) between the battery cell 1 and the cover 20 becomes very short, and the risk of short circuit is high. [Overview of the Initiative] [Problems that the invention aims to solve]

[0011] The present invention was conceived against the background of the prior art described above, and aims to provide a battery module structure in which the insulation between the battery cell and the housing that houses it is improved. In particular, the present invention aims to provide a battery module structure in which the insulation distance between the housing, which is provided with vent holes for the discharge of gas and flame, and the battery cell is increased.

[0012] Another technical problem of the present invention is to provide a battery module structure that is easy to manufacture and economical, such as a battery module structure that does not block vent holes so as to allow for smooth gas discharge, and minimizes the risk of short circuits between the exposed metal parts of the vent holes and the battery cells.

[0013] The technical problems of the present invention are not limited to the purposes mentioned above. Other purposes and advantages of the present invention not mentioned can be understood from the following description and more clearly from the embodiments of the present invention. Furthermore, it is readily apparent that the purposes and advantages of the present invention can be achieved by the means and combinations thereof described in the claims. [Means for solving the problem]

[0014] To solve the aforementioned problems, the present invention provides a battery module structure comprising: a battery cell; a housing for housing the battery cell; a cover that constitutes one surface of the housing and has a first hole that connects the inside and 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 hole insulating portion that covers at least a part of the inner circumferential surface of the first hole.

[0015] According to the present invention, a battery module structure is provided in which the risk of short circuits that may increase due to the insulating sheet having a second hole is reduced, by having the insulating hole portion cover the inner circumferential surface of the first hole.

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

[0017] The housing may include an open upper frame. In this case, the cover may be a top cover that covers the upper part of the frame. While holes for gas discharge are generally provided in the top cover of the battery module, the structure and arrangement of the housing and the cover may differ from this.

[0018] It is preferable that a plurality of the first holes and the hole insulating portions are provided.

[0019] According to a first embodiment of the present invention, the hole insulating portion may be formed by the insulating sheet extending from the inner circumference of the second hole. For example, the hole insulating portion may be formed by the insulating sheet plastically deforming to conform to the first hole.

[0020] Preferably, the hole insulating portion covers the entire circumferential portion of the first hole in at least a portion of the thickness direction. More preferably, the hole insulating portion can cover the entire inner circumferential surface of the first hole. This can increase the insulation distance between the battery cell and the cover by at least the thickness of the cover.

[0021] The hole insulating portion may include an overhang portion whose tip extends radially inward. If the hole insulating portion is provided along the entire circumferential length of the first hole, the overhang portion may also be provided along the entire circumferential length. In this case, the overhang portion may have a shape in which the outer end of the hole insulating portion is bent radially inward. The overhang portion may extend across the path from the battery cell to the exposed portion of the cover to further increase the insulation distance between the battery cell and the cover.

[0022] The hole insulating portion may include an outer cover portion extending radially outward from the outside of the cover. Preferably, the outer cover portion is provided along the entire circumferential length. The outer cover portion can further increase the distance between the battery cell and the cover by covering a portion of the outer surface of the cover that is connected to the outer end of the first hole.

[0023] According to a second embodiment of the present invention, the hole insulating portion can be provided on a hole insulating member that is attached to the first hole.

[0024] The hole insulating portion can cover the entire inner surface of the first hole. As a result, the insulating distance between the battery cell and the cover can be increased by at least the thickness of the cover.

[0025] The perforated insulating member may overlap the insulating sheet radially. Alternatively, the perforated insulating member may overlap the insulating sheet on the inside of the cover in the direction normal to the cover. This can prevent the battery cell from short-circuiting with the inner surface of the cover that is exposed in the gap between the insulating sheet and the perforated insulating member.

[0026] 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 off to the outside of the cover through the first hole, and by overlapping with the insulating sheet, a short circuit between the inner surface of the cover and the battery cell can be prevented.

[0027] The hole insulating member may include an outer cover portion extending radially outward from the outside of the cover. The outer cover portion is preferably provided along the entire circumferential section. The outer cover portion can further increase the insulation distance between the battery cell and the cover by covering a part of the outer surface of the cover connected to the outer end of the first hole. Also, the outer cover portion interferes with the outer surface of the cover to prevent the hole insulating member from falling off to the inside of the cover through the first hole.

[0028] According to the second embodiment of the present invention, the hole insulating member may be fixed so as not to flow in the thickness direction in the first hole by including the inner cover portion and the outer cover portion.

[0029] The present invention also provides a battery pack incorporating the battery module and a structure of an automobile incorporating the battery pack.

[0030] A plurality of the battery modules can be integrated to form a battery pack for increasing its capacity and / or voltage. The battery pack may include a vent device capable of discharging gas and flame discharged when the battery module ignites to the outside. The battery pack can be installed as a power source in an automobile. The automobile may include an electric vehicle, a hybrid vehicle, etc.

Effects of the Invention

[0031] This invention can provide a battery module structure with improved insulation and minimized short-circuit risk.

[0032] Specifically, the present invention provides a battery module structure in which a vent hole for the discharge of gas and flame is provided, and an insulating hole covering the inner circumferential surface of the vent hole increases the insulating distance between the battery cell and the housing.

[0033] Another advantage of the present invention is that it provides an economical battery module structure that offers improved insulation performance, minimizes the risk of accidents, can be manufactured by a simple method such as plastic deformation of an insulating synthetic resin film, and does not require various additional materials or complex configurations.

[0034] Furthermore, the present invention can provide various other effects, which will be described in each embodiment, or effects that can be easily inferred by an ordinary person will not be described. [Brief explanation of the drawing]

[0035] [Figure 1] This is a diagram showing a battery module equipped with vent holes. [Figure 2] This is a diagram showing a battery module equipped with vent holes. [Figure 3] This figure shows a cross-section of the battery module shown in Figure 1. [Figure 4] This figure shows a cross-section of the battery module shown in Figure 1. [Figure 5] This figure shows the insulation distance in the battery module shown in Figure 1. [Figure 6] This figure shows a battery module according to a first embodiment of the present invention. [Figure 7] This figure shows a battery module according to a first embodiment of the present invention. [Figure 8] This figure shows an insulating sheet according to the first embodiment of the present invention. [Figure 9]This figure shows a cover and insulating sheet according to a first embodiment of the present invention. [Figure 10] This figure shows a cross-section of a battery module according to a first embodiment of the present invention. [Figure 11] This figure shows a cross-section of a battery module according to a first embodiment of the present invention. [Figure 12] This figure shows the insulation distance in a battery module according to the first embodiment of the present invention. [Figure 13] This figure shows a battery module according to a second embodiment of the present invention. [Figure 14] This figure shows a battery module according to a second embodiment of the present invention. [Figure 15] This figure shows a perforated insulating member according to a second embodiment of the present invention. [Figure 16] This figure shows a cover, insulating sheet, and perforated insulating member according to a second embodiment of the present invention. [Figure 17] This figure shows a cross-section of a battery module according to a second embodiment of the present invention. [Figure 18] This figure shows a cross-section of a battery module according to a second embodiment of the present invention. [Figure 19] This figure shows the insulation distance in a battery module according to a second embodiment of the present invention. [Figure 20] This figure shows a battery pack including a battery module according to one embodiment of the present invention. [Figure 21] This figure shows an automobile including a battery pack, which includes a battery module, according to one embodiment of the present invention. [Modes for carrying out the invention]

[0036] The aforementioned objectives, features, and advantages will be described in detail below with reference to the accompanying drawings, so that a person with ordinary skill in the art to which the present invention pertains can easily implement the technical concept of the present invention. In describing the present invention, if a specific description of known technology according to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0037] The terms "first," "second," etc., are used to indicate various components, but these components are not limited by these terms. These terms are simply used to distinguish one component from another, and unless otherwise specified, the first component may also be the second component.

[0038] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0039] Hereinafter, the placement of any configuration on the "upper (or lower)" or "above (or below)" of a component means not only that the configuration is placed in contact with the upper (or lower) surface of the component, but also that other configurations may be interposed between the component and any configuration placed on (or below) it.

[0040] Furthermore, when it is stated that one component is “linked,” “joined,” or “connected” to another component, it should be understood that the components may be directly linked or connected to one another, but may also be “interposed” between each component, or each component may be “linked,” “joined,” or “connected” through other components.

[0041] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as “composed of” or “including” in this application should not be interpreted as necessarily including all of the multiple components or stages described in the specification, but rather as some of the components or stages may not be included, or may include further components or stages.

[0042] Throughout the specification, "A and / or B" means A, B, or A and B unless otherwise specified, and "C~D" means C or greater and D or less unless otherwise specified.

[0043] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

[0044] [First Embodiment - Battery Module with Extended Insulating Sheet] The following describes in detail a battery module and its insulating structure according to the first embodiment of the present invention with reference to Figures 6 to 12.

[0045] Figures 6 and 7 show a battery module according to a first embodiment of the present invention. Referring to these drawings, the battery module (M) according to this embodiment may include a battery cell 1 and a housing 2 that houses it.

[0046] The battery cell 1 may be a pouch-type battery cell containing a metal foil pouch, or it may be a cell stack in which multiple cells are stacked in the width direction, but its structure is not particularly limited.

[0047] The housing 2 may include a cover 20 that forms one side thereof. According to this embodiment, the housing 2 may include an open upper frame 21 and a cover 20 that covers the upper part thereof.

[0048] The housing 2, and in particular the cover 20, may include a conductive metal material.

[0049] The cover 20 may be provided with a first hole 200 to allow gas generated from the battery cell 1 to be discharged to the outside of the housing 2. Multiple first holes 200 may be provided.

[0050] 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, for example, be attached to the inner surface of the cover 20.

[0051] Figure 8 shows an insulating sheet according to a first embodiment of the present invention, and Figure 9 shows a cover and insulating sheet according to a 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.

[0052] In this case, if the inner surface of the first hole 200 is exposed without being covered by the insulating sheet 30, the risk of a short circuit occurring between the exposed inner surface of the first hole 200 and the battery cell 1 increases. To prevent this, the battery module (M) may include a hole insulating portion 31 that covers at least a part of the inner surface of the first hole 200.

[0053] According to this embodiment, the perforated insulating portion 31 can extend from the insulating sheet 30. For example, the perforated insulating portion 31 may be in a shape in which the insulating sheet 30 extends from the outer circumference of the second hole 300. The perforated insulating portion 31 according to this embodiment may be formed, for example, by the insulating sheet 30 being stretched and undergoing plastic deformation.

[0054] The hole insulating portion 31 is preferably provided along the entire circumferential length of the inner surface of the first hole 200. More preferably, the hole insulating portion 31 can cover the entire inner surface of the first hole 200. This can increase the insulation distance between the battery cell 1 and the cover 20 by at least the thickness of the cover 20.

[0055] Figures 10 and 11 show a cross-section of a battery module according to a first embodiment of the present invention. Referring to these drawings, the hole insulating portion 31 may include an overhang portion 311 whose tip extends radially inward. The overhang portion 311 may be provided along the entire circumferential length. According to this embodiment, the overhang portion 311 may have a shape in which the upper end of the hole insulating portion 31 is bent radially inward.

[0056] Figure 12 shows the insulation distance in a battery module according to the first embodiment of the present invention. Referring to this, the battery module (M) according to this embodiment can have a large insulation distance (d) by comprising a hole insulating portion 31 that almost completely covers the inner circumferential surface of the first hole 200 and an overhang portion 311 that extends radially inward from the first hole 200.

[0057] In this case, the overhang portion 311 extends across the path from the battery cell 1 to the exposed portion of the cover 20, thereby further increasing the insulation distance (d).

[0058] In a modified example, the hole insulating portion 31 may include an outer cover portion (not shown) extending radially outward from the outside of the cover 20. Preferably, the outer cover portion is provided along the entire circumferential length. For example, the insulating distance can be further increased by the outer cover portion covering a portion of the outer surface of the cover 20 connected to the outer end of the first hole 200. In addition, the insulating sheet 30 can be fixed to the cover 20 by the outer cover portion interfering with the outer surface of the cover 20.

[0059] [Second Embodiment - Battery Module Equipped with Perforated Insulating Member] In the following, with reference to Figures 13 to 19, a battery module and its insulating structure according to a second embodiment of the present invention will be described in detail.

[0060] Figures 13 and 14 show a battery module according to a second embodiment of the present invention. Referring to these drawings, the battery module (M) according to this embodiment may include a battery cell 1 and a housing 2 that houses it.

[0061] The battery cell 1 may be a pouch-type battery cell containing a metal foil pouch, or it may be a cell stack in which multiple cells are stacked in the width direction, but its structure is not particularly limited.

[0062] The housing 2 may include a cover 20 that forms one side thereof. According to this embodiment, the housing 2 may include an open upper frame 21 and a cover 20 that covers the upper part thereof.

[0063] The housing 2, and in particular the cover 20, may include a conductive metal material.

[0064] The cover 20 may be provided with a first hole 200 to allow gas generated from the battery cell 1 to be discharged to the outside of the housing 2. Multiple first holes 200 may be provided.

[0065] 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, for example, be attached to the inner surface of the cover 20.

[0066] Figure 15 shows a perforated insulating member according to a second embodiment of the present invention, and Figure 16 shows a cover, insulating sheet, and perforated insulating member according to a second embodiment of the present invention. Referring to these drawings, the insulating sheet 30 can be provided with a second hole 300 corresponding to the first hole 200.

[0067] In this case, if the inner surface of the first hole 200 is exposed without being covered by the insulating sheet 30, the risk of a short circuit occurring between the exposed inner surface of the first hole 200 and the battery cell 1 increases. To prevent this, the battery module (M) may include a hole insulating portion 31 that covers at least a part of the inner surface of the first hole 200.

[0068] Preferably, the hole insulating portion 31 is provided along the entire circumferential length of the inner surface of the first hole 200. More preferably, the hole insulating portion 31 can cover the entire inner surface of the first hole 200. This can increase the insulation distance between the battery cell 1 and the cover 20 by at least the thickness of the cover 20.

[0069] According to this embodiment, the hole insulating portion 31 may be provided on a hole insulating member 31 fixed to the first hole 200. According to this embodiment, the hole insulating portion 31 may be the hole insulating member 31 itself. For example, the hole insulating portion 31 according to this embodiment may be an annular member sandwiched between the inner circumferential surfaces of the first hole 200.

[0070] Figures 17 and 18 show a cross-section of a battery module according to a second embodiment of the present invention. Referring to these drawings, the perforated insulating member 31 can be superimposed on the insulating sheet 30.

[0071] Specifically, the perforated insulating member 31 can be superimposed radially on the insulating sheet 30. Alternatively, the perforated insulating member 31 can be superimposed on the insulating sheet 30 on the inside of the cover 20 in the direction normal to the cover 20. This prevents the battery cell 1 from short-circuiting with the inner surface of the cover 20 that is exposed in the gap between the insulating sheet 30 and the perforated insulating member 31.

[0072] For example, the perforated insulating member 31 may include an inner cover portion 312 that extends radially outward from the inside of the cover 20. Preferably, the inner cover portion 312 is provided along the entire circumferential length. The inner cover portion 312 interferes with the inner surface of the cover 20 to prevent the perforated insulating member 31 from falling out of the cover 20 through the first hole 200, and 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.

[0073] The hole insulating member 31 may include an outer cover portion 313 that extends radially outward from the outside of the cover 20. Preferably, the outer cover portion 313 is provided along the entire circumferential length. The outer cover portion 313 can further increase the insulation distance between the battery cell 1 and the cover 20 by covering a portion of the outer surface of the cover 20 that is connected to the outer end of the first hole 200. In addition, the outer cover portion 313 can interfere with the outer surface of the cover 20 to prevent the hole insulating member 31 from falling into the inside of the cover 20 through the first hole 200.

[0074] The inner cover portion 312 and / or the outer cover portion 313 may be formed by the plastic deformation of the annular hole insulating member 31 by pulling its end outwards.

[0075] According to a second embodiment of the present invention, the perforated insulating member 31 may be fixed in the first hole so as not to flow in the thickness direction by comprising an inner cover portion 312 and an outer cover portion 313.

[0076] Figure 19 shows the insulation distance in a battery module according to a second embodiment of the present invention. Referring to this, the battery module (M) according to this embodiment can have a large insulation distance (d) by providing a hole insulating member 31 that almost completely covers the inner circumferential surface of the first hole 200 and has an inner cover portion 312 and / or an outer cover portion 313.

[0077] In this case, the inner cover portion 312 and the outer cover portion 313 interfere with the cover 20, thereby fixing the perforated insulating member 31 so that it cannot fall out to the outside and / or inside of the cover 20, and extending along the path from the battery cell 1 to the exposed portion of the cover 20, thereby increasing the insulation distance (d).

[0078] [Battery pack and automobile structure] The following describes a battery pack including a battery module according to one embodiment of the present invention, and the structure of an automobile including the battery pack, with reference to Figures 20 and 21.

[0079] The battery module housed in the battery pack according to this embodiment may be the battery module (M) according to the first and second embodiments, or any of the battery modules according to the present invention.

[0080] Figures 20 and 21 show a battery pack including a battery module and an automobile including the battery pack according to one embodiment of the present invention. Referring to these drawings, multiple battery modules (M) can be integrated to form a battery pack (P) in order to increase their capacity and / or voltage. The battery pack (P) may include a venting device that can vent gases and flames emitted in the event of a fire in the battery module (M) to the outside. The battery pack (P) can be installed as a power source in an automobile (V). The automobile (V) may include electric vehicles, hybrid vehicles, etc.

[0081] The embodiments described above are all illustrative and not limiting, and the scope of the present invention is indicated more by the claims described below than by the detailed description above. Furthermore, the meaning and scope of the claims described below, as well as any modified and transformable forms conceived from their equivalent concepts, should all be interpreted as being included within the scope of the present invention.

[0082] As described above, the present invention has been explained with reference to the illustrative drawings. However, it is clear that the present invention is not limited by the embodiments and drawings disclosed herein, and that various modifications can be made by an ordinary person within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described in the embodiments described above, it is natural that the effects that can be predicted by such configuration should also be recognized. [Explanation of symbols]

[0083] 1 battery cell 2 Housing 20 Covers 200 First hole (vent hole) 21 frames 30 Insulating Sheets 300 2nd hole 31 Hole insulating part (hole insulating member) 311 Overhang section 312 Inner cover section 313 Outer cover section d Insulation distance M Battery Module P Battery Pack V Automobile

Claims

1. Battery cell and A housing for the aforementioned battery cell, A cover that forms one surface of the housing and has a first hole that connects the inside and outside of the housing, An insulating sheet is provided between the battery cell and the cover, and has a second hole corresponding to the first hole, A hole insulating portion that covers at least a part of the inner circumferential surface of the first hole, including, Battery module.

2. The insulating sheet adheres to the inner surface of the cover. The battery module according to claim 1.

3. The housing includes an open upper frame, The cover covers the upper part of the frame. The battery module according to claim 1.

4. Multiple of the first hole and the hole insulating portion are provided. The battery module according to claim 1.

5. The aforementioned hole insulating portion is formed such that the insulating sheet extends from the inner circumference of the second hole. The battery module according to claim 1.

6. The hole insulating portion covers the entire circumferential portion of the first hole in at least a portion of the thickness direction. The battery module according to claim 5.

7. The hole insulating portion covers the entire inner circumferential surface of the first hole. The battery module according to claim 6.

8. The aforementioned hole insulating portion includes an overhang portion whose tip extends radially inward, The battery module according to claim 5.

9. The overhang portion is provided along the entire circumferential section. The battery module according to claim 8.

10. The aforementioned hole insulating portion includes an outer cover portion that extends radially outward from the outside of the cover. The battery module according to claim 5.

11. The outer cover portion is provided along the entire circumferential section, The battery module according to claim 10.

12. The hole insulating portion is provided on the hole insulating member that is attached to the first hole. The battery module according to claim 1.

13. The hole insulating portion covers the entire inner circumferential surface of the first hole. The battery module according to claim 12.

14. The aforementioned perforated insulating member overlaps the insulating sheet in the radial direction. The battery module according to claim 12.

15. The perforated insulating member overlaps the insulating sheet on the inside of the cover in the direction normal to the cover, The battery module according to claim 12.

16. The aforementioned hole insulating member includes an inner cover portion that extends radially outward from the inside of the cover, The battery module according to claim 12.

17. The inner cover portion is provided along the entire circumferential section, The battery module according to claim 16.

18. The aforementioned perforated insulating member includes an outer cover portion that extends radially outward from the outside of the cover, The battery module according to claim 12.

19. The outer cover portion is provided along the entire circumferential section, The battery module according to claim 18.

20. A battery module comprising the battery module described in any one of claims 1 to 19, Battery pack.

21. Includes the battery pack described in claim 20, car.

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