Battery pack

Abstract

A battery pack is disclosed. A battery pack according to one embodiment of the present invention comprises: a case having a bottom plate and providing an internal space; the battery module is positioned in the shell; and an exhaust cover coupled to the case, covering at least one surface of the battery module, and at least a portion of which is movable in an outward direction of the battery module.

Description

Technical Field

[0001] The present disclosure relates to a battery pack.

[0002] This application claims priority to Korean Patent Application No. 10-2023-0090616 filed in Korea on Jul. 12, 2023, the disclosure of which is incorporated herein by reference. Background Art

[0003] With the rapid increase in demand for portable electronic products such as laptops, cameras, and mobile phones, and the gradual commercialization of robots and electric vehicles, research on high-performance secondary batteries that can be repeatedly charged and discharged is deepening.

[0004] Currently, commercial secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries and lithium secondary batteries. Among them, compared with nickel-based secondary batteries, lithium secondary batteries have attracted widespread attention due to their advantages of almost no memory effect, free charge and discharge, extremely low self-discharge rate and high energy density.

[0005] These lithium secondary batteries generally use lithium-based oxides and carbon materials as positive and negative active materials, respectively. Lithium secondary batteries include: an electrode assembly, in which a positive plate and a negative plate coated with positive and negative active materials, respectively, are arranged with a separator sandwiched between them; and an outer shell, i.e., a battery case, which stores and seals the electrode assembly and the electrolyte.

[0006] Generally, lithium secondary batteries may be classified into can-type secondary batteries in which an electrode assembly is accommodated in a metal can and pouch-type secondary batteries in which an electrode assembly is accommodated in a pouch of an aluminum laminate, according to the shape of a case.

[0007] Recently, secondary batteries have been widely used in medium and large devices for driving or energy storage such as electric vehicles and energy storage systems (ESS), and in small devices such as portable electronic devices. The above-mentioned multiple secondary batteries can be electrically connected and stored in a module housing to form a battery module. In addition, the above-mentioned multiple battery modules can be connected to configure a battery pack.

[0008] However, in the case where a large number of secondary batteries (battery cells) or a large number of battery modules are densely stored in a small space, they may be susceptible to thermal events. In particular, if an event such as thermal runaway occurs in any one battery cell, high-temperature gas, flame, and heat may be generated. If such gas, flame, or heat is transferred to other battery cells included in the same battery module, an explosive chain reaction such as heat propagation may occur. In addition, such a chain reaction may cause accidents such as fire or explosion in other battery modules as well as related battery modules.

[0009] In addition, since medium and large battery packs used in electric vehicles include a large number of battery cells and battery modules to increase output and / or capacity, the risk of thermal chain reactions can be further increased. In addition, in the case of a battery pack installed in an electric vehicle or the like, a user such as a driver may be present nearby. Therefore, if a thermal event occurring in a specific battery module fails to be controlled and triggers a chain reaction, it may cause significant property damage and casualties. Summary of the invention

[0010] Technical issues

[0011] The present disclosure is directed to solving the above-referenced problems and other problems.

[0012] It is also an object of the present disclosure to provide a battery pack having a structure that facilitates exhaust control when a thermal event occurs.

[0013] It is also an object of the present disclosure to provide a battery pack capable of suppressing or preventing heat from propagating to adjacent battery modules when a thermal event occurs.

[0014] Technical Solution

[0015] According to one aspect of the present disclosure, a battery pack is provided, comprising: a shell having a bottom plate and configured to provide an internal space; a battery module, the battery module being located within the shell; and a vent cover, the vent cover being connected to the shell, covering at least one surface of the battery module, and configured so that at least a portion of the vent cover can move in an outward direction of the battery module.

[0016] Furthermore, the battery module may be configured to be able to exhaust gas upward.

[0017] In addition, the battery module may have a vent hole formed on an upper surface.

[0018] Furthermore, the vent cover may be configured such that when a thermal event occurs in the battery module, at least a portion of the vent cover moves upward.

[0019] In addition, the exhaust cover may be configured to form a gap between the exhaust cover and an upper surface of the battery module.

[0020] Additionally, the distance between the vent cover and the battery module may be configured to increase when a thermal event occurs in the battery module.

[0021] In addition, the housing may include a partition wall mounted on the bottom plate and configured to partition the internal space, and the exhaust cover may be mounted on the partition wall.

[0022] In addition, the exhaust cover may include: a first movable portion, which is configured to cover at least one surface of the battery module and has a plate shape; a first fixed portion, which is fixed to the end of the partition wall; and a first bent portion, which is configured to connect the first fixed portion and the first movable portion.

[0023] In addition, the battery pack may further include a first elastic member between the first moving part and the battery module.

[0024] Furthermore, the first moving portion may be configured to be positioned outward from the end portion of the partition wall when a thermal event occurs in the battery module.

[0025] In addition, the case may include a battery pack cover configured to cover the vent cover, and the vent cover may be mounted on the battery pack cover.

[0026] In addition, the exhaust cover may include: a second movable portion, which is configured to cover at least one surface of the battery module and has a plate shape; a second fixed portion, which is fixed to the lower surface of the battery pack cover; and a second bent portion, which is configured to connect the second fixed portion and the second movable portion.

[0027] In addition, the battery pack may further include a second elastic member between the second moving portion and the battery pack cover.

[0028] A vehicle according to one aspect of the present disclosure includes the battery pack of the present disclosure.

[0029] Beneficial Effects

[0030] According to at least one embodiment of the present disclosure, venting control of a battery pack may be facilitated.

[0031] According to at least one embodiment of the present disclosure, when a thermal event occurs, thermal runaway can be suppressed or blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the detailed description of the present disclosure, serve to provide further understanding of the technical concept of the present disclosure, and therefore, the present disclosure is not to be construed as being limited to the accompanying drawings.

[0033] Figure 1 is a perspective view showing a battery pack according to an embodiment of the present disclosure.

[0034] Figure 2 yes Figure 1 A partial exploded view of the battery pack in the .

[0035] Figure 3 yes Figure 2 Magnified view of area A in FIG.

[0036] Figure 4 yes Figure 3 Front view of the configuration in .

[0037] Figure 5 When a thermal event occurs Figure 2 Magnified view of area A in FIG.

[0038] Figure 6 yes Figure 5 Front view of the configuration in .

[0039] Figure 7 It is shown Figure 6 Figure 3 is a diagram of a variant implementation of the configuration in FIG.

[0040] Figure 8 It is shown Figure 4 FIG. 5 is a diagram of another variant embodiment of the configuration in FIG.

[0041] Fig. 9 It shows when a thermal event occurs Figure 8 Graph of the changes in .

[0042] Fig.10 is an enlarged view of a battery pack according to another embodiment of the present disclosure.

[0043] Fig.11 yes Fig.10 Top view of the configuration in .

[0044] Fig.12 It shows when a thermal event occurs Fig.10 Graph of the changes in .

[0045] Fig.13 yes Fig.12 Top view of the configuration in . DETAILED DESCRIPTION

[0046] The preferred embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to the general and dictionary meanings, but are interpreted based on the principle that the inventor is allowed to appropriately define the terms for the best interpretation, based on the meanings and concepts corresponding to the technical aspects of the present disclosure.

[0047] Therefore, the configurations proposed in the embodiments of this specification and the drawings only indicate the most preferred embodiments of the present disclosure, but do not represent all technical ideas of the present disclosure, and therefore it should be understood that various equivalents and modifications may be made thereto when the present application is filed.

[0048] Figure 1is a perspective view showing a battery pack according to an embodiment of the present disclosure. Figure 2 yes Figure 1 A partial exploded view of the battery pack in the . Figure 1 and Figure 2 , a battery pack according to an embodiment of the present disclosure may include a case 100 , a battery module 200 , and a degassing cover 300 .

[0049] The housing 100 may provide a space therein. The housing 100 may form the exterior of the battery pack. The housing 100 may have a rectangular parallelepiped shape. The housing 100 may include a bottom plate 110, a side wall 130, a partition wall 120, and a battery pack cover 140.

[0050] The battery module 200 may be stored inside the housing 100. A plurality of battery modules 200 may be provided, and the plurality of battery modules 200 may be located, mounted, coupled, fastened or fixed inside the housing 100. The battery module 200 may include a battery cell. In this case, the battery cell may refer to a secondary battery. A plurality of battery cells may be provided to configure the battery module 200. The battery module 200 may have a rectangular parallelepiped shape.

[0051] The exhaust cover 300 may be coupled, fastened, fixed, mounted or fixed to the housing 100. The exhaust cover 300 may cover at least one surface of the battery module 200. For example, a plurality of exhaust covers 300 may be provided to cover at least one of the upper surface, side surface, front surface and rear surface of the battery module 200. In addition, each of the plurality of exhaust covers 300 may be provided for each battery module 200. In addition, the exhaust cover 300 may be configured so that at least a portion thereof may be moved in an outward direction of the battery module 200. For example, in the case where the exhaust cover 300 covers the upper surface of the battery module 200, the exhaust cover 300 may be configured to move upward. In addition, for example, in the case where the exhaust cover 300 covers the front surface of the battery module 200, the exhaust cover 300 may be configured to move forward.

[0052] According to this configuration of the present disclosure, when a thermal event occurs in the battery module 200, at least a portion of the exhaust cover 300 can move toward the outside of the battery module 200. This can guide the flow of exhaust gas g or combustible particles s exhausted from the battery module 200. Therefore, the thermal safety of the battery pack can be improved.

[0053] Figure 3 yes Figure 2 Magnified view of area A in FIG. Figure 4 yes Figure 3 Front view of the configuration in . Figure 5 When a thermal event occurs Figure 2 Magnified view of area A in FIG. Figure 6 yes Figure 5Front view of the configuration in . Figures 3 to 6 , the battery module 200 of the battery pack according to the embodiment of the present disclosure may be configured to be able to exhaust gas upward.

[0054] Thermal events may occur from battery cells located inside the battery module 200. The rear surface, left surface, and right surface of the battery module 200 may be covered by the partition wall 120. In addition, the front surface of the battery module 200 may be covered by the side wall 130. Therefore, the exhaust gas g or combustible particles s may be configured to be discharged upward or in the +Z-axis direction from the battery module 200. In this case, the exhaust cover 300 may be configured to cover the upper surface of the battery module 200.

[0055] According to such a configuration of the present disclosure, the exhaust gas g and the combustible particles s may move upward at least a portion of the exhaust cover 300. The exhaust cover 300 may facilitate the discharge of the exhaust gas g and the combustible particles s.

[0056] Reference Figures 3 to 6 The battery module 200 of the battery pack according to the embodiment of the present disclosure may have the vent hole 210 formed on the upper surface thereof. The vent cover 300 may cover the vent hole 210 .

[0057] According to this configuration of the present disclosure, the exhaust gas g and the combustible particles s may be discharged upward or in the +Z axis direction through the exhaust hole 210. The discharged exhaust gas g and the combustible particles s may move upward at least a portion of the exhaust cover 300. The exhaust cover 300 may facilitate the discharge of the exhaust gas g and the combustible particles s.

[0058] refer to Figures 3 to 6 , the vent cover 300 of the battery pack according to an embodiment of the present disclosure may be configured such that at least a portion thereof moves upward when a thermal event occurs in the battery module 200 .

[0059] According to this configuration of the present disclosure, the exhaust cover 300 can facilitate the discharge of the exhaust gas g and the combustible particles s.

[0060] Reference Figures 3 to 6 , the exhaust cover 300 of the battery pack according to an embodiment of the present disclosure may form a gap between the exhaust cover 300 and the upper surface of the battery module 200 .

[0061] According to this configuration of the present disclosure, the exhaust gas g and the combustible particles s exhausted from the battery module 200 may apply pressure to the entire area of ​​the exhaust cover 300. This may facilitate movement of the exhaust cover 300 and discharge of the exhaust gas g and the combustible particles s.

[0062] In addition, according to the configuration of the present disclosure, the gap between the battery module 200 and the exhaust cover 300 can improve the insulation effect. For example, the exhaust gas g and combustible particles s released from one of the multiple battery modules 200 may be transmitted to the adjacent battery module 200. In this case, the exhaust cover 300 covering the adjacent battery module 200 can prevent the adjacent battery module 200 from being directly exposed to the exhaust gas g or the combustible particles s. In addition, the heat transfer to the adjacent battery module 200 can be minimized.

[0063] Reference Figures 3 to 6 , the exhaust cover 300 of the battery pack according to an embodiment of the present disclosure may be made of a material having excellent heat resistance or flame retardancy. For example, the exhaust cover 300 may be made of at least one of a mica material, a silicone pad, or an aerogel pad. In addition, the exhaust cover 300 may be configured as a thin metal plate coated with a material having excellent heat resistance or flame retardancy. For example, the exhaust cover 300 may be configured as a thin metal plate coated with at least one of a mica material, a silicone pad, or an aerogel pad.

[0064] According to the configuration of the present disclosure, it is possible to improve the insulation effect between the adjacent battery modules 200. Therefore, it is possible to improve the thermal safety of the battery pack.

[0065] Reference Figures 3 to 6 The exhaust cover 300 of the battery pack according to the embodiment of the present disclosure may include a first moving portion 310, a first fixing portion 320, and a first bending portion 330. The first moving portion 310 may have a square plate shape. The first moving portion 310 may cover at least one surface of the battery module 200.

[0066] The first fixing portion 320 may be fixed to an end of the partition wall 120. For example, the first moving portion 310 may cover an upper surface of the battery module 200, and the first fixing portion 320 may be fixed to an upper portion or upper end of the partition wall 120. The first fixing portion 320 may be fastened, coupled, or attached to the partition wall 120.

[0067] The first bending portion 330 may connect the first fixed portion 320 and the first movable portion 310. The first fixed portion 320, the first movable portion 310 and the first bending portion 330 may be integrally formed. In addition, a plurality of first bending portions 330 and a plurality of first fixed portions 320 may be provided. For example, four first bending portions 330 and four first fixed portions 320 may be provided, and may be respectively located at four corner areas of the first movable portion 310. The first fixed portion 320 may be positioned outward from the first movable portion 310. For example, the first fixed portion 320 may be positioned higher than the first movable portion 310. Alternatively, the first movable portion 310 may be positioned inward from the first fixed portion 320. For example, the first movable portion 310 may be positioned lower than the first fixed portion 320.

[0068] When a thermal event occurs in the battery module 200, the first moving portion 310 may move outward or upward. The movement of the first moving portion 310 may be performed by bending the first bending portion 330. For example, the first bending portion 330 may be bent or folded upward around the first fixing portion 320. Thus, the first moving portion 310 may move upward.

[0069] According to such a configuration of the present disclosure, when a thermal event occurs, the movement of the exhaust cover 300 may be promoted, and thus the discharge of the exhaust gas g and the combustible particles s may be promoted.

[0070] refer to Figures 3 to 6 , the first moving portion 310 of the battery pack according to an embodiment of the present disclosure may be configured to be positioned outward from the end of the partition wall 120 when a thermal event occurs in the battery module 200. For example, in a case where the exhaust cover 300 covers the upper surface of the battery module 200, the first moving portion 310 may be positioned lower than the upper end of the partition wall 120. In addition, if a thermal event occurs, the first moving portion 310 may be positioned higher than the upper end of the partition wall 120.

[0071] According to such a configuration of the present disclosure, when a thermal event occurs, the first moving portion 310 may be positioned higher than the upper end of the partition wall 120 , thereby facilitating the discharge of the exhaust gas g and the combustible particles s.

[0072] Figure 7 It is shown Figure 6 FIG. 1 is a diagram of a variant embodiment of the configuration in FIG. Figure 7 , the battery pack according to an embodiment of the present disclosure may further include a first elastic member 410 between the first moving portion 310 and the battery module 200. For example, the first elastic member 410 may be positioned between an inner surface of the first moving portion 310 and an upper surface of the battery module 200. The first elastic member 410 may provide a restoring force to the first moving portion 310 in an upward direction or a +Z-axis direction.

[0073] According to such a configuration of the present disclosure, when a thermal event occurs, the bending of the first bending portion 330 or the movement of the first moving portion 310 may be facilitated due to the pressure of the exhaust gas g and the restoring force of the first elastic member 410 .

[0074] Figure 8 It is shown Figure 4 FIG. 5 is a diagram of another variant embodiment of the configuration in FIG. Fig. 9 It shows when a thermal event occurs Figure 8 See the diagram for the changes in . Figure 8 and Fig. 9 , the case 100 of the battery pack according to the embodiment of the present disclosure may include a pack cover 140 covering the vent cover 300 , and the vent cover 300 may be mounted on the pack cover 140 .

[0075] The battery pack cover 140 may have a square plate shape. The battery pack cover 140 may be fastened, coupled, fixed, or attached to the side wall 130 or the partition wall 120. The battery pack cover 140 may cover the upper surface of the plurality of battery modules 200 or the plurality of exhaust covers 300. The exhaust cover 300 may be mounted, coupled, fixed, or attached to the inner surface of the battery pack cover 140.

[0076] According to such a configuration of the present disclosure, installation of the exhaust cover 300 may be facilitated.

[0077] Reference Figure 8 and Fig. 9 The exhaust cover 300 of the battery pack according to the embodiment of the present disclosure may include a second moving portion 340, a second fixing portion 350, and a second bending portion 360. The second moving portion 340 may have a square plate shape. The second moving portion 340 may cover at least one surface of the battery module 200.

[0078] The second fixing portion 350 may be fastened, coupled, fixed, or attached to the inner surface of the pack cover 140. For example, the second moving portion 340 may cover the upper surface of the battery module 200.

[0079] The second bending portion 360 may connect the second fixed portion 350 and the second movable portion 340. The second fixed portion 350, the second movable portion 340 and the second bending portion 360 may be integrally formed. In addition, a plurality of second bending portions 360 and a plurality of second fixed portions 350 may be provided. For example, four second bending portions 360 and four second fixed portions 350 may be provided, and may be respectively located at four corner areas of the second movable portion 340. The second fixed portion 350 may be positioned outward from the second movable portion 340. For example, the second fixed portion 350 may be positioned higher than the second movable portion 340. Alternatively, the second movable portion 340 may be positioned inward from the second fixed portion 350. For example, the second movable portion 340 may be positioned lower than the second fixed portion 350.

[0080] When a thermal event occurs in the battery module 200, the second moving portion 340 may move outward or upward. The movement of the second moving portion 340 may be performed by bending the second bending portion 360. For example, the second bending portion 360 may be bent or folded upward around the second fixing portion 350. Thus, the second moving portion 340 may move upward.

[0081] According to such a configuration of the present disclosure, when a thermal event occurs, the movement of the exhaust cover 300 may be facilitated, and the discharge of the exhaust gas g and the combustible particles s may be facilitated.

[0082] Reference Figure 8 and Fig. 9, the battery pack according to an embodiment of the present disclosure may further include a second elastic member 420 located between the second moving portion 340 and the battery pack cover 140. For example, the second elastic member 420 may be positioned between the outer surface of the second moving portion 340 and the inner surface of the battery pack cover 140. The second elastic member 420 may provide a restoring force to the second moving portion 340 in an upward direction or a +Z-axis direction.

[0083] According to such a configuration of the present disclosure, when a thermal event occurs, the bending of the second bending portion 360 or the movement of the second moving portion 340 may be facilitated due to the pressure of the exhaust gas g and the restoring force of the second elastic member 420 .

[0084] Fig.10 is an enlarged view of a battery pack according to another embodiment of the present disclosure. Fig.11 yes Fig.10 Top view of the configuration in . Fig.12 It shows when a thermal event occurs Fig.10 Graph of the changes in . Fig.13 yes Fig.12 Top view of the configuration in .

[0085] refer to Figures 10 to 13 The battery module 200 of the battery pack according to the embodiment of the present disclosure may be configured to be able to vent forward. In this case, the vent cover 300 may be configured to cover the front surface of the battery module 200.

[0086] According to this configuration of the present disclosure, the exhaust gas g and the combustible particles s may move at least a portion of the exhaust cover 300 forward or in the +X axis direction. The exhaust cover 300 may facilitate the discharge of the exhaust gas g and the combustible particles s.

[0087] Reference Figures 10 to 13 , the exhaust cover 300 of the battery pack according to an embodiment of the present disclosure may form a gap between the exhaust cover 300 and the front surface of the battery module 200 .

[0088] According to the configuration of the present disclosure, the exhaust gas g and the combustible particles s exhausted from the battery module 200 may apply pressure to the entire area of ​​the exhaust cover 300. Therefore, the movement of the exhaust cover 300 may be facilitated, and the exhaust gas g and the combustible particles s may be discharged smoothly.

[0089] In addition, according to the configuration of the present disclosure, the gap between the battery module 200 and the exhaust cover 300 can improve the insulation effect. For example, the exhaust gas g and combustible particles s discharged from one of the multiple battery modules 200 may be transmitted to the adjacent battery module 200. In this case, the exhaust gas cover 300 covering the adjacent battery module 200 can prevent the adjacent battery module 200 from being directly exposed to the exhaust gas g or the combustible particles s. In addition, the heat transfer to the adjacent battery module 200 can be minimized.

[0090] Reference Figures 10 to 13 The exhaust cover 300 of the battery pack according to the embodiment of the present disclosure may include a first moving portion 310, a first fixing portion 320, and a first bending portion 330. The first moving portion 310 may have a square plate shape. The first moving portion 310 may cover at least the front surface of the battery module 200.

[0091] The first fixing portion 320 may be fixed to an end of the partition wall 120. For example, the first moving portion 310 may cover the front surface of the battery module 200, and the first fixing portion 320 may be fixed to the front end of the partition wall 120. The first fixing portion 320 may be fastened, coupled, or attached to the partition wall 120.

[0092] The first bending portion 330 may connect the first fixed portion 320 and the first movable portion 310. The first fixed portion 320, the first movable portion 310 and the first bending portion 330 may be integrally formed. In addition, a plurality of first bending portions 330 and a plurality of first fixed portions 320 may be provided. For example, four first bending portions 330 and four first fixed portions 320 may be provided, and may be respectively located at four corner areas of the first movable portion 310. The first fixed portion 320 may be positioned outward from the first movable portion 310. For example, the first fixed portion 320 may be positioned forward from the first movable portion 310. Alternatively, the first movable portion 310 may be positioned inward from the first fixed portion 320. For example, the first movable portion 310 may be positioned backward or inward from the first fixed portion 320.

[0093] When a thermal event occurs in the battery module 200, the first movable portion 310 may move outward, forward, or in the +X axis direction. The movement of the first movable portion 310 may be performed by bending the first bending portion 330. For example, the first bending portion 330 may be bent or folded forward around the first fixing portion 320. Therefore, the first movable portion 310 may move forward or in the +X axis direction.

[0094] According to such a configuration of the present disclosure, when a thermal event occurs, the movement of the exhaust cover 300 may be facilitated, and the discharge of the exhaust gas g and the combustible particles s may be facilitated.

[0095] Reference Figures 10 to 13 , the first moving portion 310 of the battery pack according to the embodiment of the present disclosure may be configured to be positioned outward, forward, or in the +X-axis direction from the end of the partition wall 120 when a thermal event occurs in the battery module 200. For example, in the case where the exhaust cover 300 covers the front surface of the battery module 200, the first moving portion 310 may be positioned behind the front end of the partition wall 120. In addition, when a thermal event occurs, the first moving portion 310 may be located in front of the front end of the partition wall 120.

[0096] According to such a configuration of the present disclosure, when a thermal event occurs, the first moving portion 310 may be positioned in front of the front end of the partition wall 120 , thereby facilitating the discharge of the exhaust gas g and the combustible particles s.

[0097] The vehicle according to the present disclosure may include two or more battery cell assemblies according to the present disclosure. The battery cell assembly according to the present disclosure may be applied to vehicles such as electric vehicles or hybrid vehicles. In addition, in addition to the battery cell assembly, the vehicle according to the present disclosure may also include various other components included in the vehicle. For example, in addition to the battery cell assembly according to the present disclosure, the vehicle according to the present disclosure may also include a body, a motor or a control device, such as an ECU (electronic control unit).

[0098] At the same time, although terms indicating directions such as up, down, left, right, forward and backward are used in this specification, it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the position of the target object or the position of the observer.

[0099] As described above, although the present disclosure has been described with reference to limited embodiments and drawings, the present disclosure is not limited thereto, and those skilled in the art may make various modifications and changes within the technical concept of the present disclosure and the equivalent scope of the claims.

Claims

1. A battery pack, comprising: a housing having a bottom plate and configured to provide an interior space; A battery module, wherein the battery module is located in the housing; as well as A vent cover is coupled to the housing, covers at least one surface of the battery module, and is configured such that at least a portion of the vent cover can move in an outward direction of the battery module.

2. The battery pack according to claim 1, in, The battery module is configured to be able to exhaust gas upward.

3. The battery pack according to claim 1, in, The battery module has a vent hole formed on an upper surface.

4. The battery pack according to claim 2, in, The vent cover is configured such that when a thermal event occurs in the battery module, at least a portion of the vent cover moves upward.

5. The battery pack according to claim 1, in, The exhaust cover is configured to form a gap between the exhaust cover and an upper surface of the battery module.

6. The battery pack according to claim 1, in, The distance between the vent cover and the battery module is configured to increase when a thermal event occurs in the battery module.

7. The battery pack according to claim 1, in, The housing includes a partition wall mounted on the bottom plate and configured to partition the internal space, and Wherein, the exhaust cover is installed on the partition wall.

8. The battery pack according to claim 7, in, The exhaust cover comprises: a first moving portion configured to cover the at least one surface of the battery module and having a plate shape; a first fixing portion fixed to an end portion of the partition wall; and A first bending portion, wherein the first bending portion is configured to connect the first fixing portion and the first moving portion.

9. The battery pack according to claim 8, The battery pack further includes a first elastic member between the first moving portion and the battery module.

10. The battery pack according to claim 8, in, The first moving portion is configured to be positioned outward from the end portion of the partition wall when a thermal event occurs in the battery module.

11. The battery pack according to claim 1, in, The housing includes a battery pack cover configured to cover the vent cover, and Wherein, the exhaust cover is installed on the battery pack cover.

12. The battery pack according to claim 11, in, The exhaust cover comprises: a second moving portion configured to cover the at least one surface of the battery module and having a plate shape; a second fixing portion fixed to a lower surface of the battery pack cover; and A second bending portion, wherein the second bending portion is configured to connect the second fixed portion and the second movable portion.

13. The battery pack according to claim 12, The battery pack further includes a second elastic member located between the second moving portion and the battery pack cover.

14. A vehicle comprising the battery pack according to any one of claims 1 to 13.

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