Battery module wherein thermal propagation is prevented

Abstract

The present invention provides a structure of a battery module, the battery module comprising: a cell stack comprising a plurality of battery cells stacked in a width direction and at least one barrier member interposed between the battery cells and stacked in the width direction together with the battery cells; and a housing for accommodating the cell stack, wherein the barrier member comprises a metal layer and insulating layers provided on respective sides in the width direction of the metal layer, and the insulating layers have a greater thickness in the width direction than the metal layer on each of the respective sides in the width direction of the metal layer.

Description

Battery modules that prevent heat transfer

[0001] This application claims the benefit of priority from Republic of Korea Patent Application No. 10-2023-0160984, dated November 20, 2023, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a structure of a battery module including a cell stack in which a plurality of pouch-shaped cells are stacked, in which thermal runaway of a module unit due to heat transmission between cells is prevented.

[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] Figure 1 illustrates the structure of a pouch-type battery cell. Referring to this, a typical pouch-type battery cell (11) has a configuration in which an electrode assembly (110) is accommodated in a pouch (111). The pouch (111) accommodates the electrode assembly (110) and can be folded in half, and fusion-sealed at a sealing portion (111S) provided on one side in the height direction. In order to have a high voltage and / or a high capacity, a plurality of battery cells (11) can be stacked to form a cell stack.

[0007] Fig. 2 illustrates the configuration of a cell stack. Referring to this, a plurality of battery cells (11) may be stacked in the width direction to form a cell stack (1). The cell stack (1) may also include a barrier member (12) interposed between the battery cells (11) to prevent heat transmission between the battery cells (11). At this time, the battery cells (11) may form one or more cell banks (10) isolated by the barrier member (12). Such cell stacks (1) may be electrically connected to form one module.

[0008] Figures 3 and 4 illustrate the structure of a typical battery module. Referring to these, the battery module (M) may include a busbar frame assembly (2) connected to the front of the cell stack (1) to electrically connect the battery cells (11) to each other, and a housing (3) that accommodates the cell stack (1).

[0009] Meanwhile, the battery cell (11) may experience thermal runaway due to a short circuit or impact. Since the battery cells (11) are stacked in the width direction, heat may be conducted from a cell that has ignited to adjacent cells. Accordingly, there is a risk that not only the battery cell (11) but also other battery cells may ignite in a chain reaction, resulting in thermal runaway at the module level.

[0010] In addition, the high-temperature gas and flame generated at this time can be discharged upward from the battery cell (11) as the fusion portion of the sealing portion (111S) melts. The gas and flame can transmit heat to other battery cells through the free space within the housing above the cell stack (1).

[0011] In order to prevent such heat propagation, a solution has been proposed to interpose the barrier member (12) between the battery cells (11), but the barrier member (12) has a problem in that heat is concentrated in one area and easily conducts heat or melts, and has a limitation in that it cannot prevent heat propagation due to convection of gas and flame through the free space above the cell stack (1).

[0012] The present invention was created under the background of the above-described prior art, and its purpose is to provide a structure of a battery module that prevents thermal runaway of a module unit by preventing heat conduction between cells.

[0013] The present invention also aims to provide a structure of a battery module that prevents local damage to a barrier member or rapid temperature rise due to gas and flame caused by ignition of a battery cell.

[0014] Another technical challenge of the present invention is to provide a structure of a battery module having a barrier member that can maintain its structure without deformation even in a high temperature and high pressure environment.

[0015] Another object of the present invention is to provide a structure of a battery module in which heat propagation due to convection of gas and flame through free space within a housing is prevented.

[0016] The present invention also seeks to provide a structure of a battery module in which ignition due to short circuit is prevented by strengthening insulation between battery cells and between battery cells and a housing.

[0017] 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.

[0018] In order to solve the above problem, the present invention provides a battery module comprising a cell stack including a plurality of battery cells stacked in the width direction and at least one barrier member interposed between the battery cells and stacked in the width direction together with the battery cells; and a housing accommodating the cell stack; wherein the barrier member includes a metal layer and an insulating layer provided on both sides of the metal layer in the width direction.

[0019] As the barrier member includes the metal layer, the barrier member can more effectively block the transfer of radiant heat between cells, and local temperature rise of the barrier member is suppressed.

[0020] It is preferable that the insulating layer has a widthwise thickness greater than that of the metal layer on each of both sides of the widthwise direction of the metal layer. If the thickness of the metal layer increases, the insulation distance between a pair of battery cells interposed between the barrier member may become shorter, which may increase the possibility of a short circuit. In order to maximize both the heat dissipation and radiation heat blocking effects of the metal layer and the inter-cell insulation effect by the insulating layer, the thickness of the metal layer is preferably as thin as possible, and the thickness of the insulating layer is preferably greater than this. In addition, as will be described later, in order to secure the rigidity of the insulating layer, the thickness of the insulating layer is preferably thicker than that of the metal layer.

[0021] The above insulating layer may be formed as a rigid body. The term "rigid body" may refer to a member having a predetermined or higher yield strength and / or flexural rigidity. In other words, the insulating layer may have a rigidity capable of structurally resisting high-pressure gases and flames emitted by ignition of the battery cell.

[0022] The insulating layer preferably possesses heat resistance. Accordingly, insulation between cells can be maintained even under thermal runaway conditions, and the structural rigidity of the barrier member can also be maintained. Maintaining the structure of the insulating layer even at high temperatures is advantageous in preventing short circuits between cells and heat transfer through gas and flame convection.

[0023] The above barrier member may include an insulating layer provided on one or both sides of the metal layer in the width direction. It is preferable that the insulating layer have a greater width direction thickness than the metal layer or the insulating layer.

[0024] The above insulating layer may have compressibility in the width direction. Accordingly, the insulating layer may block thermal conduction between the battery cells while simultaneously absorbing assembly tolerances and / or swelling of the battery cells, thereby improving the structural stability of the battery module.

[0025] For example, the insulating layer may include a porous foam material. Such a foam material possesses both insulating and compressible properties, and thus can effectively perform inter-cell insulation and absorption of tolerances.

[0026] The insulating layer may be provided on the outer side of the insulating layer in the width direction. In other words, the insulating layer may be provided closer to the battery cell than the insulating layer. Accordingly, even if the battery cell ignites on one side of the barrier member in the width direction and the insulating layer melts, the insulating layer provided on the other side of the barrier member in the width direction does not melt, so that the barrier member can still exhibit an insulating effect.

[0027] One end of the barrier member may protrude in the one direction relative to one end of the battery cell. As one end of the barrier member protrudes relative to the battery cell, heat transmission due to convection of gas and flame through the free space between the cell stack and the housing may be blocked. At this time, the insulating layer is preferably formed of a heat-resistant rigid body as described above so as to maintain its structure and rigidity against high-pressure gas and flame.

[0028] One end of the metal layer and the insulating layer may protrude in the one direction relative to one end of the battery cell and the insulating layer. By protruding relative to the insulating layer, the metal layer and the insulating layer can slowly dissipate heat absorbed from the battery cell. Accordingly, a rapid temperature increase of the entire battery module can be prevented.

[0029] In order for the barrier member to effectively prevent convection of gas and flame through the free space, it is preferable that the length by which one end of the barrier member protrudes from one end of the battery cell is at least half of the shortest distance between one end of the battery cell and the housing.

[0030] An inwardly facing groove may be provided on the inner side of one side wall of the housing to accommodate a protruding end of the barrier member. By accommodating one end of the barrier member in the groove, the free space between the cell stack and the housing can be completely isolated in the width direction.

[0031] The above-mentioned home portion may be provided on an insulating cover that is connected to the housing on the inside of one side wall of the housing and includes an insulating material. Accordingly, the metal layer included in the barrier member and the housing are insulated, so that short circuits between the battery cells and between the battery cells and the housing can be more effectively prevented.

[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 heat transmission between cells is prevented by interposing a barrier member having heat resistance and / or insulation between battery cells.

[0035] The present invention can also provide a structure of a battery module in which thermal conductivity within a barrier member is increased by a metal layer provided in the barrier member, and heat transmission between cells due to radiant heat and local temperature rise is blocked.

[0036] Another effect of the present invention is that it is possible to provide a structure of a battery module having a barrier member that can maintain its structure without being deformed even in high-temperature and high-pressure gas and flame by including a heat-resistant rigid plate.

[0037] The present invention can also provide a structure of a battery module in which heat transfer between cells due to convection of gas and flame through free space within the housing is blocked by a barrier member extending from the cell stack to the inside of the housing.

[0038] Another advantage of the present invention is that it can provide a structure of a battery module in which short circuits are prevented during normal operation and cell ignition by an insulating layer included in a barrier member and an insulating cover provided inside a housing.

[0039] 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.

[0040] Figure 1 shows the structure of a pouch-type battery cell.

[0041] Figure 2 shows the configuration of a cell stack.

[0042] Figures 3 and 4 show the structure of a typical battery module.

[0043] Figure 5 shows the structure of a battery cell according to one embodiment of the present invention.

[0044] Figure 6 shows the structure of a barrier member according to one embodiment of the present invention.

[0045] Figure 7 shows the configuration of a cell stack according to one embodiment of the present invention.

[0046] Figures 8 and 9 illustrate the structure of a battery module according to one embodiment of the present invention.

[0047] Figures 10 and 11 illustrate cross-sections of a battery module according to one embodiment of the present invention.

[0048] Figure 12 shows the main part of Figure 11.

[0049] FIG. 13 illustrates a barrier member according to one embodiment of the present invention preventing heat transmission between cells.

[0050] Figures 14 and 15 show a battery cell igniting in a battery module according to one embodiment of the present invention.

[0051] FIGS. 16 and 17 each illustrate the structure of a battery pack accommodating a battery module according to one embodiment of the present invention and a vehicle incorporating the battery pack.

[0052] [Explanation of symbols]

[0053] 1: Cell stack

[0054] 10: Cell Bank

[0055] 11: Battery cell

[0056] 110: Electrode assembly

[0057] 111: Pouch

[0058] 111S: Sealing part

[0059] 12: Absence of barrier

[0060] 120: Metal layer

[0061] 121: Insulating layer

[0062] 122: Insulation layer

[0063] 2: Busbar frame assembly

[0064] 3: Housing

[0065] 30: Module Frame

[0066] 31: Top plate

[0067] 310: Insulating cover

[0068] 311: Home Department

[0069] 32: End plate

[0070] M: Battery module

[0071] P: Battery pack

[0072] V: Car

[0073] L1: Thickness of the metal layer

[0074] L2: Thickness of the insulation layer

[0075] 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.

[0076] 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.

[0077] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings.

[0083]

[0084] [Structure of battery cells and cell stacks]

[0085] Hereinafter, with reference to FIGS. 5 to 7, the structure of a battery cell, a barrier member, and a cell laminate in which these are laminated according to one embodiment of the present invention will be described in detail.

[0086] Figure 5 illustrates the structure of a battery cell according to one embodiment of the present invention. Referring to this, a battery cell (11) according to one embodiment of the present invention may include an electrode assembly (110) and a pouch (111) that accommodates and seals the electrode assembly (110).

[0087] The above pouch (111) may be folded to surround the electrode assembly (110) and sealed at a sealing portion (111S) on one side in the height direction. The sealing may be achieved by fusion, and thus may be melted by high heat. Therefore, if the battery cell (11) catches fire due to a short circuit or the like, there is a high possibility that high-temperature gas and flames will be discharged to the outside of the pouch (111) through the sealing portion (111S).

[0088] The battery cell (11) may include an electrode lead extending from the electrode assembly (110) and protruding outside the pouch (111). The electrode lead may electrically connect the electrode assembly (110) to the outside.

[0089] Figure 6 illustrates the structure of a barrier member according to one embodiment of the present invention. Referring to this, the barrier member (12) may include a metal layer (120) and an insulating layer (121) provided on both sides in the width direction thereof.

[0090] The above metal layer (120) may include a metal material with high thermal conductivity. For example, the metal layer (120) may be formed of a thin metal foil.

[0091] The above insulating layer (121) may be formed of an insulating material. The insulating layer (121) preferably has heat resistance and preferably has a predetermined bending rigidity. For example, the insulating layer (121) may include a synthetic resin or mica material having a predetermined thickness or more and having insulating and heat resistance properties.

[0092] It is preferable that the thickness of the above insulating layer (121) be greater than the thickness of the above metal layer (120).

[0093] The above barrier member (12) may include an insulating layer (122) provided on both sides in the width direction of the metal layer (120). It is preferable that the insulating layer (122) be provided on the outer side in the width direction compared to the insulating layer (121).

[0094] It is preferable that the above-mentioned insulating layer (122) has compressibility in the width direction. For example, the above-mentioned insulating layer (122) may include a porous foam material having excellent insulating and compressible properties, but the material of the above-mentioned insulating layer (122) is not limited thereto.

[0095] Figure 7 illustrates the configuration of a cell stack according to one embodiment of the present invention. Referring to this, a plurality of battery cells (11) may be stacked in the width direction to form a cell stack (1). At this time, one or more barrier members (12) may be provided.

[0096] The above battery cells (100) can be grouped one or more together to form a plurality of cell banks (10) isolated by the barrier member (110). At this time, the barrier member (12) can prevent heat transmission between the cell banks (10) and, by including the insulating layer (121), can prevent short circuits between the battery cells (11).

[0097] When the barrier member (12) includes the insulating layer (122) having compressibility, the barrier member (12) can absorb the assembly tolerance between the cell banks (10) or the swelling of the battery cells (11).

[0098]

[0099] [Rough structure of a battery module]

[0100] Hereinafter, with reference to FIGS. 8 and 9, a general structure of a battery module according to one embodiment of the present invention will be described.

[0101] Figures 8 and 9 illustrate the structure of a battery module according to one embodiment of the present invention. Referring to these drawings, the cell stack (1) can be accommodated in a housing (3) to form a battery module (M).

[0102] A busbar frame assembly (2) can be coupled to one longitudinal side of the above cell stack (1).

[0103] The above busbar frame assembly (2) can include a pair of terminals protruding outside the housing (3) so as to electrically connect the electrode leads to each other and electrically connect the entire cell stack (1) to the outside.

[0104] The above busbar frame assembly (2) may include a busbar frame constituting a main body, a slit through which the electrode lead passes, and a busbar through which the electrode lead passes through the slit and is connected.

[0105] The above housing (3) may include a module frame (30) having a bottom surface and a pair of side walls and accommodating the cell stack (1), a pair of end plates (32) covering the front and rear of the cell stack (1), and a top plate (31) covering the upper side of the cell stack (1).

[0106] The top plate (31) may be provided with venting holes (not shown) for discharging upward gas and flames generated from the cell stack (1). It is preferable that a plurality of venting holes (not shown) be provided to ensure structural rigidity of the top plate (31) and smooth discharge of gas.

[0107] An insulating cover (310) may be connected to the bottom surface of the top plate (31) to insulate the cell stack (1) from the top plate (31). The insulating cover (310) may be made of an insulating material, and preferably has heat resistance.

[0108]

[0109] [Barrier Absence Layout Structure]

[0110] Hereinafter, with reference to FIGS. 10 to 12, a detailed description will be given of a specific arrangement structure of a barrier member according to one embodiment of the present invention.

[0111] Figures 10 and 11 illustrate cross-sections of a battery module according to one embodiment of the present invention, and Figure 12 illustrates a main portion of Figure 11. Referring to these drawings, one end of the barrier member (12) may protrude toward the one end compared to one end of the battery cell (11). In other words, a predetermined free space may be formed between the cell stack (1) and the housing (3), and at this time, one end of the barrier member (12) may extend toward the housing (3) through the free space.

[0112] At this time, it is preferable that the thickness (L2) of the insulating layer (121) be greater than the thickness (L1) of the metal layer (120), so that the reduction in the insulation distance between cells due to the metal layer (120) is minimized, and at the same time, the rigidity of the insulating layer (121) and the supporting force for the metal layer (120) are further strengthened. Since the insulating layer (121) has an appropriate thickness and rigidity, the protruding end of the barrier member (12) can maintain its structure without being deformed by high-pressure, high-temperature gas and flame.

[0113] According to the present embodiment, one end of the metal layer (120) and the insulating layer (121) may protrude compared to one end of the insulating layer (122). Accordingly, the barrier member (12) may slowly dissipate heat absorbed from the battery cell (11) through the protruding portion where the insulating layer (122) is not provided, thereby preventing a rapid temperature rise of the cell stack (1).

[0114] A groove (311) may be provided on the inner side of one side wall of the housing (3) to accommodate a protruding end of the barrier member (12). Specifically, the one side wall may be the top plate (31). By accommodating the barrier member (12) in the groove (311), the free space is completely partitioned in the width direction, thereby more effectively blocking the propagation of gas and flame.

[0115] The above-mentioned home portion (311) may be provided in the insulating cover (310). Accordingly, the possibility of a short circuit between the battery cells (11) through the metal layer (120) may be reduced.

[0116]

[0117] [Thermal transmission prevention effect of barrier absence]

[0118] Hereinafter, with reference to FIGS. 13 to 15, the effect of a barrier member according to one embodiment of the present invention in preventing heat transfer between cells during normal operation and cell firing will be described in detail.

[0119] Figure 13 illustrates a barrier member according to one embodiment of the present invention preventing heat transmission between cells. Referring to this, if one of the battery cells (11) ignites, heat generated from the battery cell (11) may be radiated and / or conducted to neighboring battery cells, resulting in thermal runaway of the module unit due to a chain reaction of ignitions.

[0120] According to the present embodiment, since the barrier member (12) includes the metal layer (120), when a local portion of the barrier member (12) is heated, a local temperature rise of the barrier member (12) is suppressed, and heat can be dispersed throughout the entire barrier member (12).

[0121] In particular, when the metal layer (120) protrudes outward compared to the insulating layer (122), the barrier member (12) can prevent a rapid temperature rise of the cell stack (1) by acting as a heat dissipation fin that slowly dissipates heat absorbed from the battery cell (11).

[0122] When the above battery cell (11) ignites, high-temperature gas and flames may be ejected upward from the cell stack (1) in which the sealing portion (111S) is provided. These gases and flames may propagate to other battery cells through the free space between the cell stack (1) and the housing (3), causing thermal runaway in the module unit.

[0123] According to the present embodiment, as the barrier member (12) protrudes outwardly relative to the battery cell (11) and extends inwardly of the housing (3), the free space between the cell stack (1) and the housing (3) can be isolated in the width direction. Accordingly, heat transmission between cells due to convection of gas and flame through the free space can be blocked.

[0124] When the above insulating layer (121) has bending rigidity and heat resistance, the barrier member (12) can maintain the state of isolating the free space without being deformed by high temperature and high pressure gas and flame.

[0125] Figures 14 and 15 illustrate a battery cell igniting in a battery module according to one embodiment of the present invention. Referring to these drawings, when the battery cell (11) located on one side of the width direction of the barrier member (12) ignites, the insulating layer (122) and / or the insulating layer (121) may melt due to high heat. At this time, the metal layer (120) may not melt even at high heat due to its high melting point.

[0126] According to the present embodiment, the insulating layer (121) and / or the heat insulating layer (122) provided on the other side in the width direction of the barrier member (12) may not melt due to the heat dissipation effect of the metal layer (120). Accordingly, the barrier member (12) can maintain its structure against high-temperature and high-pressure gas and flame, prevent heat propagation due to radiation, convection, and / or conduction, and prevent short circuits between cells.

[0127]

[0128] [Battery pack and vehicle structure]

[0129] Hereinafter, with reference to FIGS. 16 and 17, a structure of a battery pack accommodating a battery module according to one embodiment of the present invention and a vehicle incorporating the same will be described.

[0130] Figures 16 and 17 illustrate the structure of a battery pack accommodating a battery module according to one embodiment of the present invention and a vehicle incorporating the battery pack, respectively. 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 incorporated into a vehicle (V) as a power source. The vehicle (V) may include an electric vehicle, a hybrid vehicle, etc.

[0131]

[0132] 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.

[0133] 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. A cell stack comprising a plurality of battery cells stacked in the width direction and at least one barrier member interposed between the battery cells and stacked in the width direction together with the battery cells; and In a battery module including a housing for accommodating the above cell stack, The above barrier member is formed as a rigid body and includes a metal layer and an insulating layer provided on both sides of the width direction of the metal layer. A battery module, wherein the insulating layer has a widthwise thickness greater than that of the metal layer on each of the widthwise sides of the metal layer.

2. In claim 1, A battery module wherein the insulating layer has heat resistance.

3. In claim 1, A battery module, wherein the barrier member includes an insulating layer provided on one or both sides of the width direction of the metal layer.

4. In claim 3, A battery module, wherein the insulating layer has compressibility in the width direction.

5. In claim 4, A battery module, wherein the insulating layer is provided on the outer side in the width direction of the insulating layer.

6. In claim 1, A battery module, wherein one end of the barrier member protrudes in the one direction compared to one end of the battery cell.

7. In claim 3, A battery module, wherein one end of the metal layer and the insulating layer protrudes in the one direction compared to one end of the battery cell and the insulating layer.

8. In claim 6, A battery module, wherein a length of one end of the barrier member protruding from one end of the battery cell is at least half of the shortest distance between one end of the battery cell and the housing.

9. In claim 6, A battery module, wherein an inwardly facing recess is provided on the inner side of one side wall of the housing to accommodate a protruding end of the barrier member.

10. In claim 9, A battery module, wherein the above-mentioned home portion is connected to the housing on the inner side of one side wall of the housing and is provided with an insulating cover including an insulating material.

11. A cell stack comprising a plurality of battery cells stacked in the width direction and at least one barrier member interposed between the battery cells and stacked in the width direction together with the battery cells; and In a battery module including a housing for accommodating the above cell stack, The above barrier member comprises a metal layer, a rigid insulating layer provided on both sides of the width direction of the metal layer, and an insulating layer provided on both sides of the width direction of the insulating layer. A battery module, wherein the insulating layer has compressibility in the width direction.

12. In claim 11, A battery module wherein the insulating layer has heat resistance.

13. In claim 11, A battery module, wherein one end of the barrier member protrudes in the one direction compared to one end of the battery cell.

14. In claim 13, A battery module, wherein one end of the metal layer and the insulating layer protrudes in the one direction compared to one end of the battery cell and the insulating layer.

15. In claim 13, A battery module, wherein an inwardly facing recess is provided on the inner side of one side wall of the housing to accommodate a protruding end of the barrier member.

16. A battery pack comprising a battery module according to any one of claims 1 to 15.

17. A vehicle comprising the battery pack of claim 16.

Images