Battery pack

Abstract

The battery pack according to one embodiment of the present invention may include a case including a base plate and providing an interior space, a battery module positioned inside the case, and a vent cover coupled to the case, covering at least one side of the battery module, and configured such that at least a portion of the vent cover is movable outward from the battery module.

Description

[Technical Field]

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

[0002] This application claims priority based on Korean Patent Application No. 10-2023-0090616, filed on July 12, 2023, the entire contents of which are incorporated herein by reference in their entirety in the specification and drawings thereof. [Background technology]

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

[0004] Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Of these, lithium secondary batteries are attracting attention due to their advantages of being free to charge and discharge because they have almost no memory effect compared to nickel-based secondary batteries, an extremely low self-discharge rate, and a high energy density.

[0005] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive and negative electrode active materials, respectively, and include an electrode assembly in which a separator is sandwiched between positive and negative electrode plates coated with the positive and negative electrode active materials, and an exterior case, i.e., a battery case, that hermetically houses the electrode assembly together with an electrolyte.

[0006] Generally, lithium secondary batteries are classified into can-type secondary batteries, in which an electrode assembly is housed in a metal can, and pouch-type secondary batteries, in which an electrode assembly is housed in a pouch made of an aluminum laminate sheet, depending on the shape of the exterior material.

[0007] Recently, secondary batteries have been widely used for driving and storing energy not only in small devices such as portable electronic devices but also in medium- to large-sized devices such as electric vehicles and energy storage systems (ESS). A battery module can be configured by electrically connecting multiple secondary batteries and storing them together inside a module case. A battery pack can also be configured by connecting multiple battery modules.

[0008] However, when multiple secondary batteries (battery cells) or multiple battery modules are packed into a small space, they may be vulnerable to thermal events. In particular, if an event such as thermal runaway occurs in one battery cell, high-temperature gas, flames, and heat may be generated. For example, if such gas, flame, or heat is transmitted to other battery cells in the same battery module, an explosive chain reaction such as thermal propagation may occur. Furthermore, such a chain reaction may not only cause accidents such as fire or explosion in the battery module, but also fire or explosion in other battery modules.

[0009] Furthermore, in the case of medium- to large-sized battery packs for electric vehicles, etc., the risk of thermal chain reactions is even greater because a large number of battery cells and battery modules are included to increase output and / or capacity. Furthermore, in the case of battery packs installed in electric vehicles, etc., users such as drivers may be present nearby. Therefore, if a thermal event occurring in a specific battery module is not properly controlled and a chain reaction occurs, it may cause not only significant property damage but also personal injury. Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention is directed to solving the above-referenced problems and other problems.

[0011] Another object of the present invention is to provide a battery pack having a structure that allows for easy vent control when a thermal event occurs.

[0012] It is still another object of the present invention to provide a battery pack that can suppress or block heat transfer to adjacent battery modules when a thermal event occurs. [Means for solving the problem]

[0013] To achieve the above object, a battery pack according to one aspect of the present invention may include a case having a base plate and providing an internal space, a battery module positioned inside the case, and a vent cover coupled to the case, covering at least one side of the battery module, and configured so that at least a portion of the vent cover is movable outward from the battery module.

[0014] The battery module may also be configured to be vented upward.

[0015] The battery module may also include a vent hole formed on an upper surface thereof.

[0016] The vent cover may also be configured to have at least a portion thereof move upward when a thermal event occurs in the battery module.

[0017] In addition, the vent cover may form a gap with the upper surface of the battery module.

[0018] The battery pack may also be configured such that a distance between the vent cover and the battery module increases when a thermal event occurs in the battery module.

[0019] The case may further include a partition wall provided on the base plate to define an internal space, and the vent cover may be provided on the partition wall.

[0020] The vent cover may include a first moving portion having a plate shape and covering at least one side of the battery module, a first fixing portion fixed to an end of the partition wall, and a first bending portion connecting the first fixing portion and the first moving portion.

[0021] The battery pack may further include a first elastic member positioned between the first moving part and the battery module.

[0022] The first moving portion may be configured to be positioned outside an end of the partition wall when a thermal event occurs in the battery module.

[0023] The case may also include a pack cover that covers the vent cover, and the vent cover may be provided on the pack cover.

[0024] The vent cover may include a second moving portion having a plate shape and covering at least one surface of the battery module, a second fixing portion fixed to a lower surface of the pack cover, and a second bending portion connecting the second fixing portion and the second moving portion.

[0025] The battery pack may further include a second elastic member positioned between the second moving part and the pack cover.

[0026] An automobile according to one embodiment of the present invention includes the battery pack of the present invention. [Effects of the Invention]

[0027] At least one embodiment of the present invention may facilitate controlled venting of a battery pack.

[0028] According to at least one embodiment of the present invention, thermal runaway can be suppressed or blocked when a thermal event occurs.

[0029] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention, serve to further understand the technical concepts of the present invention. Therefore, the present invention should not be interpreted as being limited to only the matters described in the drawings. [Brief explanation of the drawings]

[0030] [Figure 1] 1 is a perspective view showing a battery pack according to an embodiment of the present invention; [Figure 2] FIG. 2 is a diagram showing an isolated configuration of a part of the battery pack of FIG. [Figure 3] FIG. 3 is an enlarged view of part A in FIG. 2. [Figure 4] FIG. 4 is a front view of FIG. 3. [Figure 5] FIG. 3 is an enlarged view of part A in FIG. 2 when a thermal event occurs. [Figure 6] FIG. 6 is a front view of FIG. 5. [Figure 7] FIG. 7 is a diagram showing a modified embodiment of the configuration of FIG. 6. [Figure 8] FIG. 5 is a diagram showing another modified embodiment of the configuration of FIG. 4. [Figure 9] FIG. 9 shows the changes in FIG. 8 when a thermal event occurs. [Figure 10] FIG. 10 is an enlarged view of a battery pack according to another embodiment of the present invention. [Figure 11] FIG. 11 is a top view of FIG. [Figure 12] FIG. 11 shows the changes in FIG. 10 when a thermal event occurs. [Figure 13] FIG. 13 is a top view of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and phrases used in the specification and claims should not be construed as being limited to their ordinary and dictionary meanings, but should be construed as having meanings and concepts corresponding to the technical ideas of the present invention, in accordance with the principle that the inventors themselves can appropriately define the concepts of terms in order to best describe the invention.

[0032] Therefore, it should be understood that the configurations shown in the embodiments described in this specification are merely the most desirable embodiments of the present invention and do not represent the entire technical idea of ​​the present invention, and that there may be various equivalents and modifications that can be substituted therefor at the time of this application.

[0033] Fig. 1 is a perspective view showing a battery pack according to an embodiment of the present invention. Fig. 2 is a view showing a partial configuration of the battery pack in Fig. 1 in an separated state. Referring to Figs. 1 and 2, the battery pack according to an embodiment of the present invention may include a case 100, a battery module 200, and a vent cover 300.

[0034] The case 100 may provide a space inside. The case 100 may form the exterior of the battery pack. The case 100 may have a rectangular parallelepiped shape. The case 100 may include a base plate 110, side walls 130, a partition wall 120, and a pack cover 140.

[0035] The battery module 200 may be located inside the case 100. A plurality of battery modules 200 may be provided, and the plurality of battery modules 200 may be positioned, installed, coupled, fastened, or fixed inside the case 100. The battery module 200 may include battery cells. In this case, the battery cells may refer to secondary batteries. A plurality of battery cells may be provided to constitute the battery module 200. The battery module 200 may have a rectangular parallelepiped shape.

[0036] The vent cover 300 may be coupled, fastened, fixed, installed, or secured to the case 100. The vent cover 300 may cover at least one surface of the battery module 200. For example, a plurality of vent covers 300 may be provided, covering at least one of the top, side, front, and rear surfaces of the battery module 200. A plurality of vent covers 300 may be provided, positioned in one-to-one correspondence with the battery modules 200. At least a portion of the vent cover 300 may be configured to be movable outward from the battery module 200. For example, if the vent cover 300 covers the top surface of the battery module 200, the vent cover 300 may be configured to be movable upward. For example, if the vent cover 300 covers the front surface of the battery module 200, the vent cover 300 may be configured to be movable forward.

[0037] According to this configuration of the present invention, when a thermal event occurs in the battery module 200, at least a portion of the vent cover 300 can move to the outside of the battery module 200. This can guide the flow of vent gas g or ignitable particles s discharged from the battery module 200. Therefore, the thermal safety of the battery pack can be improved.

[0038] Fig. 3 is an enlarged view of portion A in Fig. 2. Fig. 4 is a front view of Fig. 3. Fig. 5 is an enlarged view of portion A in Fig. 2 when a thermal event occurs. Fig. 6 is a front view of Fig. 5. Referring to Figs. 3 to 6, a battery module 200 of a battery pack according to one embodiment of the present invention may be configured to be vented upward.

[0039] A thermal event may occur in a battery cell located inside the battery module 200. The rear, left, and right sides of the battery module 200 may be covered by a partition wall 120. In addition, the front side of the battery module 200 may be covered by a side wall 130. As a result, the vent gas (g) and ignitable particles (s) may be configured to be discharged toward the upper side or the +Z-axis direction of the battery module 200. In this case, the vent cover 300 may be configured to cover the upper surface of the battery module 200.

[0040] According to this configuration of the present invention, the vent gas (g) and the ignitable particles (s) can move upward at least a portion of the vent cover 300. The vent cover 300 can facilitate the discharge of the vent gas (g) and the ignitable particles (s).

[0041] 3 to 6, a battery module 200 of a battery pack according to an embodiment of the present invention may include a vent hole 210 formed on an upper surface thereof. A vent cover 300 may cover the vent hole 210.

[0042] According to this configuration of the present invention, the vent gas (g) and the ignitable particles (s) can be discharged upward or in the +Z-axis direction through the vent hole (210). The discharged vent gas (g) and the ignitable particles (s) can move at least a portion of the vent cover (300) upward. The vent cover (300) can facilitate the discharge of the vent gas (g) and the ignitable particles (s).

[0043] 3 to 6, the vent cover 300 of the battery pack according to one embodiment of the present invention can be configured to move at least partially upward when a thermal event occurs in the battery module 200.

[0044] According to this configuration of the present invention, the vent cover 300 can facilitate the discharge of the vent gas g and the ignitable particles s.

[0045] 3 to 6, the vent cover 300 of the battery pack according to an embodiment of the present invention may form a gap with the upper surface of the battery module 200.

[0046] According to this configuration of the present invention, the vent gas (g) and the combustible particles (s) discharged from the battery module 200 can apply pressure to the entire vent cover 300. This facilitates the movement of the vent cover 300, allowing the vent gas (g) and the combustible particles (s) to be discharged smoothly.

[0047] Furthermore, according to this configuration of the present invention, the gap between the battery module 200 and the vent cover 300 can improve the heat insulating effect. For example, vent gas (g) and combustible particles (s) discharged from one of the battery modules 200 may propagate to an adjacent battery module 200. In this case, the vent cover 300 covering the adjacent battery module 200 can prevent the adjacent battery module 200 from being directly exposed to the vent gas (g) and combustible particles (s). In addition, heat transfer to the adjacent battery module 200 can be minimized.

[0048] 3 to 6, the vent cover 300 of the battery pack according to one embodiment of the present invention may be made of a material having excellent heat resistance or flame retardancy. For example, the vent cover 300 may be made of at least one of a mica material, a silicone pad, and an aerogel pad. The vent cover 300 may also be made of a thin metal plate material coated with a material having excellent heat resistance or flame retardancy. For example, the vent cover 300 may be made of a thin metal plate coated with at least one of a mica material, a silicone pad, and an aerogel pad.

[0049] According to this configuration of the present invention, it is possible to improve the heat insulating effect between adjacent battery modules 200. This makes it possible to improve the thermal safety of the battery pack.

[0050] 3 to 6, a vent cover 300 of a battery pack according to an embodiment of the present invention 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 rectangular plate shape. The first moving portion 310 may cover at least one side of the battery module 200.

[0051] The first fixing portion 320 may be fixed to an end portion of the partition wall 120. For example, the first moving portion 310 may cover the upper surface of the battery module 200, and the first fixing portion 320 may be fixed to the 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.

[0052] The first bending portion 330 can connect the first fixed portion 320 and the first moving portion 310. The first fixed portion 320, the first moving portion 310, and the first bending portion 330 can be integrally formed. Furthermore, a plurality of first bending portions 330 and first fixed portions 320 can be provided. For example, four first bending portions 330 and four first fixed portions 320 can be provided, and they can be located at the four corner regions of the first moving portion 310. The first fixed portion 320 can be located outward from the first moving portion 310. For example, the first fixed portion 320 can be located above the first moving portion 310. Alternatively, the first moving portion 310 can be located inward from the first fixed portion 320. For example, the first moving portion 310 can be located below the first fixed portion 320.

[0053] 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 achieved 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. This allows the first moving portion 310 to move upward.

[0054] This configuration of the present invention allows for easy movement of the vent cover 300 in the event of a thermal event, allowing for easy exhaust of the vent gas g and pyrotechnic particles s.

[0055] 3 to 6, the first moving part 310 of the battery pack according to an embodiment of the present invention may be configured to be positioned outward from an end of the partition wall 120 when a thermal event occurs in the battery module 200. For example, when the vent cover 300 covers the upper surface of the battery module 200, the first moving part 310 may be positioned lower than the upper end of the partition wall 120. Furthermore, when a thermal event occurs, the first moving part 310 may be positioned higher than the upper end of the partition wall 120.

[0056] According to this configuration of the present invention, when a thermal event occurs, the first moving portion 310 is positioned higher than the upper end of the partition wall 120, so that the vent gas g and the combustible particles s can be easily discharged.

[0057] Fig. 7 is a diagram illustrating a modified embodiment of the configuration of Fig. 6. Referring to Fig. 7, the battery pack according to the embodiment of the present invention may further include a first elastic member 410 located between the first moving part 310 and the battery module 200. For example, the first elastic member 410 may be located between the inner surface of the first moving part 310 and the upper surface of the battery module 200. The first elastic member 410 may provide a restoring force to the first moving part 310 in the upward direction or the +Z-axis direction.

[0058] According to this configuration of the present invention, when a thermal event occurs, the pressure of the vent gas g and the restoring force of the first elastic member 410 may facilitate bending of the first bending portion 330 or movement of the first moving portion 310.

[0059] Fig. 8 is a diagram showing another modified embodiment of the configuration of Fig. 4. Fig. 9 is a diagram showing changes in Fig. 8 when a thermal event occurs. Referring to Figs. 8 and 9, the case 100 of the battery pack according to one embodiment of the present invention includes a pack cover 140 that covers the vent cover 300, and the vent cover 300 can be provided on the pack cover 140.

[0060] The pack cover 140 may have a rectangular plate shape. The pack cover 140 may be fastened, coupled, fixed, or attached to the side wall 130 or the partition wall 120. The pack cover 140 may cover the upper surfaces of the plurality of battery modules 200 or the plurality of vent covers 300. The vent covers 300 may be installed, coupled, fixed, or attached to the inner surface of the pack cover 140.

[0061] According to this configuration of the present invention, the vent cover 300 can be easily installed.

[0062] 8 and 9, a vent cover 300 of a battery pack according to an embodiment of the present invention 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 rectangular plate shape. The second moving portion 340 may cover at least one side of the battery module 200.

[0063] 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.

[0064] The second bending portion 360 can connect the second fixed portion 350 and the second moving portion 340. The second fixed portion 350, the second moving portion 340, and the second bending portion 360 can be integrally formed. Furthermore, a plurality of second bending portions 360 and second fixed portions 350 can be provided. For example, four second bending portions 360 and four second fixed portions 350 can be provided, and they can be located at the four corner regions of the second moving portion 340. The second fixed portion 350 can be located outward from the second moving portion 340. For example, the second fixed portion 350 can be located above the second moving portion 340. Alternatively, the second moving portion 340 can be located inward from the second fixed portion 350. For example, the second moving portion 340 can be located below the second fixed portion 350.

[0065] When a thermal event occurs in the battery module 200, the second moving portion 340 can move outward or upward. The movement of the second moving portion 340 can be achieved by bending the second bending portion 360. For example, the second bending portion 360 can be bent or folded upward around the second fixing portion 350. This allows the second moving portion 340 to move upward.

[0066] This configuration of the present invention allows for easy movement of the vent cover 300 in the event of a thermal event, allowing for easy exhaust of the vent gas g and pyrotechnic particles s.

[0067] 8 and 9, the battery pack according to an embodiment of the present invention may further include a second elastic member 420 located between the second moving part 340 and the pack cover 140. For example, the second elastic member 420 may be located between the outer surface of the second moving part 340 and the inner surface of the pack cover 140. The second elastic member 420 may provide the second moving part 340 with a restoring force in the upward direction or the +Z-axis direction.

[0068] According to this configuration of the present invention, when a thermal event occurs, the pressure of the vent gas g and the restoring force of the second elastic member 420 can facilitate bending of the second bending portion 360 or movement of the second moving portion 340.

[0069] Fig. 10 is an enlarged view of a battery pack according to another embodiment of the present invention. Fig. 11 is a top view of Fig. 10. Fig. 12 is a diagram showing the changes in Fig. 10 when a thermal event occurs. Fig. 13 is a top view of Fig. 12.

[0070] 10 to 13, the battery module 200 of the battery pack according to one embodiment of the present invention may be configured to be vented forward. In this case, the vent cover 300 may be configured to cover the front surface of the battery module 200.

[0071] According to this configuration of the present invention, the vent gas (g) and the ignitable particles (s) can move at least a portion of the vent cover (300) forward or in the +X-axis direction. The vent cover (300) can facilitate the discharge of the vent gas (g) and the ignitable particles (s).

[0072] 10 to 13, the vent cover 300 of the battery pack according to an embodiment of the present invention may form a gap with the front surface of the battery module 200.

[0073] According to this configuration of the present invention, the vent gas (g) and the combustible particles (s) discharged from the battery module 200 can apply pressure to the entire vent cover 300. This facilitates the movement of the vent cover 300, allowing the vent gas (g) and the combustible particles (s) to be discharged smoothly.

[0074] Furthermore, according to this configuration of the present invention, the heat insulating effect can be improved by the gap between the battery module 200 and the vent cover 300. For example, vent gas (g) and combustible particles (s) discharged from one of the plurality of battery modules 200 may propagate to an adjacent battery module 200. In this case, the vent cover 300 covering the adjacent battery module 200 can prevent the adjacent battery module 200 from being directly exposed to the vent gas (g) and combustible particles (s). In addition, heat transfer to the adjacent battery module 200 can be minimized.

[0075] 10 to 13, a vent cover 300 of a battery pack according to an embodiment of the present invention 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 rectangular plate shape. The first moving portion 310 may cover at least the front surface of the battery module 200.

[0076] The first fixing portion 320 may be fixed to an end portion 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.

[0077] The first bending portion 330 can connect the first fixed portion 320 and the first moving portion 310. The first fixed portion 320, the first moving portion 310, and the first bending portion 330 can be integrally formed. Furthermore, a plurality of first bending portions 330 and first fixed portions 320 can be provided. For example, four first bending portions 330 and four first fixed portions 320 can be provided, and they can be located at the four corner regions of the first moving portion 310. The first fixed portion 320 can be located outward from the first moving portion 310. For example, the first fixed portion 320 can be located forward from the first moving portion 310. Alternatively, the first moving portion 310 can be located inward from the first fixed portion 320. For example, the first moving portion 310 can be located rearward or inward from the first fixed portion 320.

[0078] When a thermal event occurs in the battery module 200, the first moving portion 310 may move outward, forward, or in the +X-axis direction. The movement of the first moving portion 310 may be achieved 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. This allows the first moving portion 310 to move forward or in the +X-axis direction.

[0079] This configuration of the present invention allows for easy movement of the vent cover 300 in the event of a thermal event, allowing for easy exhaust of the vent gas g and pyrotechnic particles s.

[0080] 10 to 13, the first moving part 310 of the battery pack according to an embodiment of the present invention may be configured to be positioned outward, forward, or in the +X-axis direction from an end of the partition wall 120 when a thermal event occurs in the battery module 200. For example, when the vent cover 300 covers the front surface of the battery module 200, the first moving part 310 may be positioned behind the front end of the partition wall 120. Furthermore, when a thermal event occurs, the first moving part 310 may be positioned in front of the front end of the partition wall 120.

[0081] According to this configuration of the present invention, when a thermal event occurs, the first moving portion 310 is positioned ahead of the front end of the partition wall 120, so that the vent gas g and the ignitable particles s can be easily discharged.

[0082] An automobile according to the present invention may include two or more battery cell assemblies according to the present invention. The battery cell assembly according to the present invention may be applied to automobiles such as electric automobiles and hybrid automobiles. Furthermore, the automobile according to the present invention may further include various other components included in the automobile in addition to the battery cell assembly. For example, the automobile according to the present invention may further include a vehicle body, a motor, a control device such as an ECU (electronic control unit), etc. in addition to the battery cell assembly according to the present invention.

[0083] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back are used in this specification, it will be clear to those skilled in the art of the present invention that such terms are used for the convenience of explanation and may vary depending on the position of the object in question, the position of the observer, etc.

[0084] Although the present invention has been described above using limited embodiments and drawings, it goes without saying that the present invention is not limited thereto, and that various modifications and variations can be made by a person having ordinary knowledge in the technical field to which the present invention pertains within the technical spirit of the present invention and the equivalent scope of the claims set forth below. [Explanation of symbols]

[0085] 100 cases 110 base plate 120 Partition Wall 130 sidewall 140 Pack Cover 200 Battery Module 210 Vent Hole 300 Vent Cover 310 First Mobile Section 320 1st fixed part 330 First bending section 340 Second Mobile Section 350 2nd fixed part 360 Second bending section 410 First elastic member 420 Second elastic member g Vent gas s pyrophoric particles

Claims

1. a case with a base plate and providing an interior space; a battery module located inside the case; a vent cover coupled to the case, covering at least one surface of the battery module, and configured so that at least a portion of the vent cover is movable toward an outer side of the battery module; Including the battery pack.

2. The battery pack according to claim 1 , wherein the battery module is configured to be vented upward.

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

4. The battery pack according to claim 2 , wherein the vent cover is configured to move at least partially upward when a thermal event occurs from the battery module.

5. The battery pack according to claim 1 , wherein the vent cover forms a gap with an upper surface of the battery module.

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

7. the case includes a partition wall provided on the base plate and dividing an internal space; The battery pack according to claim 1 , wherein the vent cover is provided on the partition wall.

8. The vent cover is a first moving part having a plate shape and covering at least one surface of the battery module; a first fixing portion fixed to an end portion of the partition wall; a first bent portion connecting the first fixed portion and the first moving portion; 8. The battery pack of claim 7, comprising:

9. The battery pack of claim 8 , further comprising a first elastic member positioned between the first moving part and the battery module.

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

11. the case includes a pack cover that covers the vent cover; The battery pack according to claim 1 , wherein the vent cover is provided on the pack cover.

12. The vent cover is a second moving part having a plate shape and covering at least one surface of the battery module; a second fixing portion fixed to a lower surface of the pack cover; a second bent portion connecting the second fixed portion and the second moving portion; 12. The battery pack of claim 11, comprising:

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

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

Images