Battery packs and automobiles containing them

Abstract

A battery pack and an automobile including the same are disclosed. A battery pack according to one embodiment of the present invention includes a plurality of battery modules in which a plurality of battery cells are stacked, a pack case in which the plurality of battery modules are housed, and a vent cover coupled to the pack case having an exhaust path through which flames or gases generated in the battery cells are discharged.

Description

Technical Field

[0001] The present invention relates to a battery pack and a vehicle including the same, and more particularly, to a battery pack in which heat is uniformly diffused and gas is smoothly discharged when a thermal event occurs, and a vehicle including the same.

[0002] This application claims priority based on Korean Patent Application No. 10-2024-0048905 filed on April 11, 2024, and all of the contents disclosed in the specification and drawings of the application are incorporated into this application.

Background Art

[0003] Generally, a secondary battery refers to a battery that can be repeatedly charged and discharged, such as a lithium-ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel metal hydride battery, or a nickel zinc battery. A basic battery cell can provide an output voltage of about 2.5V to 4.2V. [[ID=第十八条]]

[0004] [[ID=第二十条]]

[0005] Lithium secondary batteries have been in the spotlight for their advantages such as a high operating voltage and a much higher energy density. However, since an organic electrolyte is used, when a lithium secondary battery is overcharged, it induces overcurrent and overheating, and ultimately causes a fire due to explosion or ignition.

[0006] Various types of secondary batteries may include battery modules, in which multiple battery cells are stacked and placed in a module case that protects the battery cells, and battery packs, which contain multiple battery modules.

[0007] Figure 1 is a perspective view of a conventional battery pack.

[0008] Referring to Figure 1, in the case of a conventional battery pack 1, when a thermal event occurs, the flame or gas is blocked by the upper frame 2 of the battery pack 1 and cannot be expelled upward, instead moving to the left or right (see arrow in Figure 1), and the internal pressure increases, making the likelihood of explosion of the battery module 3 or battery pack 1 higher.

[0009] In this scenario, if an explosion occurs in battery module 2 where the flame originated, the flame may spread to other battery modules 2, causing a thermal runaway phenomenon. If the flame escapes to the outside due to such a thermal runaway phenomenon, there is a problem that the driver of the electric vehicle may be burned or put in a dangerous situation.

[0010] Alternatively, there is a problem in that the battery module 2 or battery pack 1 may be damaged or completely burned due to a chain reaction of flames caused by flame propagation, making it difficult to ensure the safety of the battery module 2 or battery pack 1. [Overview of the project] [Problems that the invention aims to solve]

[0011] The present invention aims to provide a battery pack and an automobile including it that have a uniform heat distribution by preventing heat concentration or thermal energy trapping phenomena by ensuring that when a flame is generated from any one of the battery cells, the flame and the heat generated by the flame are uniformly diffused within the battery pack.

[0012] Another objective of the present invention is to provide a battery pack and an automobile including it, in which gas is easily discharged by facilitating smooth venting.

[0013] Another objective is to provide a battery module capable of preventing thermal runaway phenomena by preventing a chain reaction of flames caused by flame propagation, a battery pack including the same, and an automobile.

[0014] However, the technical problems that this invention aims to solve are not limited to those described above, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention below. [Means for solving the problem]

[0015] According to one aspect of the present invention, a battery pack may be provided that includes a plurality of battery modules in which a plurality of battery cells are stacked, a pack case in which the plurality of battery modules are housed, and a vent cover formed therein for discharging flames or gases generated by the battery cells and coupled to the pack case.

[0016] In one embodiment, the pack case includes an upper frame, the upper frame having a passage hole through which flames or gases can travel, and the vent cover may be coupled above the upper frame.

[0017] In one embodiment, the inside of the vent cover may be hollow to allow flames or gases to move.

[0018] In one embodiment, the vent cover is provided with a connecting hole, and the battery module can be connected to the connecting hole.

[0019] In one embodiment, the battery module includes an upper module case, the upper module case has an exhaust hole through which flames or gases are discharged, and the exhaust hole may be connected to the exhaust path of the vent cover.

[0020] In one embodiment, a connecting portion connecting the discharge hole and the discharge path may be included.

[0021] In one embodiment, the connecting portion may be composed of a gasket or a sealing member so that flames or gas do not leak.

[0022] In one embodiment, in order to prevent backflow of flames or gas, a backflow prevention member provided on the vent cover may be included.

[0023] In one embodiment, the backflow prevention member may be configured to rotate by flames or gas.

[0024] In one embodiment, the backflow prevention member may include a rotation shaft that couples to the upper surface of the vent cover, and a first opening / closing portion that is rotatably coupled to the rotation shaft and contacts the lower surface of the vent cover.

[0025] In one embodiment, the backflow prevention member may include a protrusion that protrudes from the vent cover, an elastic portion that couples to the protrusion, and a second opening / closing portion that couples to the elastic portion.

[0026] In one embodiment, the protrusion may include a first protrusion that protrudes from the upper surface of the vent cover, and a second protrusion that protrudes from the lower surface of the vent cover at a position corresponding to the position of the first protrusion and is spaced apart from the first protrusion by a preset interval.

[0027] In one embodiment, the elastic portion may include a first elastic portion that couples to the first protrusion, and a second elastic portion that couples to the second protrusion.

[0028] In one embodiment, in order to expand the discharge path of flames or gas, a path expansion member provided on the vent cover may be included.

[0029] In one embodiment, the path extension member includes at least one first protrusion protruding from the first portion of the vent cover and at least one second protrusion protruding from the second portion of the vent cover, and the first protrusion and the second protrusion can be alternately arranged.

[0030] In one embodiment, the path extension member includes at least one first protrusion protruding from the first portion of the vent cover and at least one second protrusion protruding from the second portion of the vent cover, the first protrusion is arranged to incline toward the second portion, and the second protrusion can be arranged to incline toward the first portion.

[0031] <7]] According to another aspect of the present invention, an automobile including at least one of the above-described battery packs can be provided.

Advantages of the Invention

[0033] In addition, venting becomes smoother, so that gas can be easily discharged.

[0034] In addition, a chain reaction of the flame due to flame propagation can be prevented, and a thermal runaway phenomenon can be prevented.

[0035] However, the effects of the present invention are not limited to the above-described effects, and other effects of the present invention not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Brief Description of the Drawings

[0036] [Figure 1] It is a perspective view of a conventional battery pack. [Figure 2]This is a perspective view of a battery pack according to a first embodiment of the present invention. [Figure 3] This is an exploded perspective view of a battery pack according to the first embodiment of the present invention. [Figure 4] This is a cross-sectional view along line A-A' in Figure 2. [Figure 5] This is an enlarged view of section B in Figure 3. [Figure 6] Figure 5 shows how the connector is attached to the battery module. [Figure 7] This is a cross-sectional view of a battery pack according to a second embodiment of the present invention. [Figure 8] This is a cross-sectional view of a battery pack according to a third embodiment of the present invention. [Figure 9] This is a plan view of a part of a battery pack according to a fourth embodiment of the present invention. [Figure 10] This is a plan view of a part of a battery pack according to a fifth embodiment of the present invention. [Figure 11] This is a diagram illustrating an automobile including a battery pack according to each embodiment of the present invention. [Modes for carrying out the invention]

[0037] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and in the claims should not be interpreted in a manner limited to their ordinary or dictionary meanings, but rather in a manner consistent with the technical idea of ​​the present invention, in accordance with the principle that the inventor himself may appropriately define the concepts of terms in order to best describe the invention. Accordingly, it should be understood that the embodiments described herein and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent the entirety of the technical idea of ​​the present invention, and that there may be a variety of equivalents and modifications that can be substituted therein at the time of this application.

[0038] The size of each component or specific part of a component in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity and ease of explanation. Therefore, the size of each component may not fully reflect its actual size. Specific descriptions of known functions or configurations related to the present invention will be omitted if they are deemed to unnecessarily obscure the gist of the invention.

[0039] As used herein, the terms “joining” or “connecting” include not only cases where one member is directly joined or directly connected to another member, but also cases where one member is indirectly joined or indirectly connected to another member via a connecting member.

[0040] Figure 2 is a perspective view of a battery pack according to the first embodiment of the present invention, and Figure 3 is an exploded perspective view of the battery pack according to the first embodiment of the present invention. Figure 4 is a cross-sectional view along line A-A' in Figure 2, and Figure 5 is an enlarged view of part B in Figure 3. Figure 6 shows the battery module of Figure 5 with the connecting part connected.

[0041] Referring to Figures 2 to 4, the battery pack 10 according to the first embodiment of the present invention may be configured to include a plurality of battery modules 100, a pack case 200, and a vent cover 300.

[0042] Multiple battery modules 100 can be provided and arranged in various ways. For example, they can be arranged horizontally and vertically as shown in Figure 3, but are not limited to this.

[0043] Referring to Figure 4, the battery module 100 may comprise a plurality of battery cells 110 and a module case 120.

[0044] Multiple battery cells 110 can be stacked on top of each other. The battery cells 110 have diverse structures, and multiple battery cells 110 can be stacked in various ways.

[0045] The battery cell 110 may have a structure in which multiple unit cells arranged in the order of positive electrode plate / separator / negative electrode plate, or bi-cells arranged in the order of positive electrode plate / separator / negative electrode plate / separator / positive electrode plate / separator / negative electrode plate are stacked according to the battery capacity.

[0046] The battery cell 110 may be provided with electrode leads. Electrode leads are a type of terminal exposed to the outside and connected to external devices, and may be made of a conductive material. Electrode leads may include a positive electrode lead and a negative electrode lead.

[0047] The positive electrode lead and the negative electrode lead may be positioned on opposite sides of the battery cell 110 in the longitudinal direction, or they may be positioned on the same side of the battery cell 110 in the longitudinal direction.

[0048] The battery cell 110 may comprise a plurality of cartridges (not shown) that house the battery cell 110. Each cartridge (not shown) may be manufactured by plastic injection molding, and a plurality of cartridges (not shown) having a housing for housing the battery cell 110 may be stacked. A cartridge assembly formed by stacking a plurality of cartridges (not shown) may be provided with connector elements or terminal elements.

[0049] The connector element may include various forms of electrical connection components or connection members for connecting to, for example, a Battery Management System (BMS) (not shown) that can provide data relating to the voltage or temperature of the battery cell 110.

[0050] The terminal element is a main terminal connected to the battery cell 110, and includes a positive terminal and a negative terminal. The terminal element can be electrically connected to the outside by being provided with terminal bolts. On the other hand, the battery cell 110 can have a variety of shapes.

[0051] Referring to Figure 4, multiple battery cells 110 are stacked and housed in the module case 120. The module case 120 surrounds the multiple battery cells 110, thereby protecting the battery cells 110 from external vibrations and shocks.

[0052] The module case 120 can be formed in a shape corresponding to the shape of a stack of multiple battery cells 110. For example, if the stack of multiple battery cells 110 is formed in a hexahedral shape, the module case 120 can also be formed in a corresponding hexahedral shape, but is not limited to this. Here, the module case 120 may include an upper module case 121, a lower module case 122, and a side module case 123.

[0053] Furthermore, the module case 120 can be manufactured, for example, by bending a plate of metal material, thereby allowing the module case 120 to be manufactured as a single unit. When the module case 120 is manufactured as a single unit, it has the effect of simplifying the joining process. Alternatively, the module case 120 can be provided as a separate unit and joined by welding or the like. However, the material of the module case 120 is not limited to metal material.

[0054] Referring to Figures 3 and 4, the pack case 200 houses multiple battery modules 100. The pack case 200 may be composed of, for example, an upper frame 210, a lower frame 220, a side frame 230, and a partition frame 240.

[0055] Referring to Figure 2, the vent cover 300 is connected to the upper frame 210. Referring to Figures 3 and 4, the upper frame 210 may have a movable hole 211 through which flame or gas moves. The movable hole 211 of the upper frame 210 may communicate with a connecting hole 320 of the vent cover 300.

[0056] The lower frame 220 is configured to accommodate multiple battery modules 100. The lower frame 220 may, but is not limited to, be formed in the shape of a rectangular plate. The lower frame 220 forms the bottom of the pack case 200.

[0057] The side frame 230 may be configured to extend upward from the edge of the lower frame 220. The side frame 230 defines the height of the pack case 200 and forms a predetermined space between it and the lower frame 220.

[0058] Multiple battery modules 100 are then mounted in the space between the side frame 230 and the lower frame 220. The side frame 230 may include a long-side side frame with a relatively long length and a short-side side frame with a relatively short length. Alternatively, all of the side frames 230 may be of the same length.

[0059] The bulkhead frame 240 extends upward within the lower frame 220 and connects to the side frame 230. One or more bulkhead frames 240 are provided, and battery modules 100 can be positioned between multiple bulkhead frames 240, or between the bulkhead frames 240 and the side frame 230. Here, the bulkhead frames 240 can be arranged laterally or vertically within the side frame 230.

[0060] The vent cover 300 is attached to the pack case 200. For example, referring to Figure 2, the vent cover 300 may be attached above the upper frame 210 of the pack case 200. Referring to Figure 4, the vent cover 300 has an exhaust path 310 through which flames or gases generated in the battery cell 110 are discharged.

[0061] Referring to Figure 4, the inside of the vent cover 300 is hollow, and this cavity inside the vent cover 300 functions as an exhaust path 310. The flame or gas generated from the battery cell 110 may be configured to travel through the cavity inside the vent cover 300.

[0062] Here, the flame or gas may be configured to move in only one direction of the vent cover 300, or it may be configured to move in both directions of the vent cover 300.

[0063] Referring to Figure 4, the vent cover 300 may have connecting holes 320, and the battery module 100 may be connected to the connecting holes 320 so that flames or gases generated from the battery cells 110 can move from the connecting holes 320 into the cavity inside the vent cover 300.

[0064] To explain this in more detail, as mentioned above, the module case 120 of the battery module 100 may include an upper module case 121. Referring to Figure 5, the upper module case 121 may have an exhaust hole 125 through which flames or gases are discharged. The exhaust hole 125 can then be connected to the exhaust path 310 of the vent cover 300 in various ways.

[0065] For example, referring to Figures 4, 5, and 6, the discharge hole 125 formed in the upper module case 121, the movable hole 211 formed in the upper frame 210, and the connecting hole 320 formed in the vent cover 300 are in communication with each other and can be connected by a connecting portion 400.

[0066] In other words, the connecting section 400 connects the discharge hole 125 and the discharge path 310 by connecting the discharge hole 125, the moving hole 211 and the connecting hole 320, thereby allowing the flame or gas to move through the connecting section 400 to the discharge path 310.

[0067] The connecting portion 400 can be configured in various ways. For example, it may be composed of a gasket or sealing member to prevent leakage of flame or gas. In this case, the connecting portion 400 serves not only as a sealing function to prevent leakage of flame or gas, but also as a function to connect the discharge hole 125, the movable hole 211, and the connecting hole 320. However, it is not limited to this, and the connecting portion 400 may be made from various materials and configured to form a connecting passage through which flame or gas can move.

[0068] Referring to Figure 4, flames or gases generated from the battery cells 110 inside the battery module 100 are discharged to the outside of the module case 120 through the discharge hole 125, and then move to the discharge path 310 inside the vent cover 300 through the connecting section 400 that connects the discharge hole 125, the moving hole 211, and the connecting hole 320.

[0069] As mentioned above, since a hollow discharge path 310 is formed inside the vent cover 300, flames or gases that have moved into the vent cover 300 through the connecting portion 400 and the connecting hole 320 can move along the discharge path 310 inside the vent cover 300 and be discharged.

[0070] With this method, if a flame is generated from any one of the battery cells 110, the flame inside the battery pack 10 and the heat from the flame are uniformly diffused along the exhaust path 310 inside the vent cover 300, thereby preventing heat concentration or thermal energy trapping phenomena and ensuring a uniform heat distribution.

[0071] Furthermore, the venting through the discharge path 310 of the vent cover 300 becomes smoother, allowing the gas to be easily discharged.

[0072] Furthermore, it can prevent thermal runaway phenomena by preventing a chain reaction of flames caused by the propagation of flames.

[0073] Figure 7 is a cross-sectional view of a battery pack according to a second embodiment of the present invention, and Figure 8 is a cross-sectional view of a battery pack according to a third embodiment of the present invention.

[0074] The second and third embodiments of the present invention differ from the first embodiment in that they are equipped with backflow prevention members 500. However, for parts of the second or third embodiment that are common with those described in the first embodiment, the description of the first embodiment above will be used instead. Also, for parts of the second or third embodiment that are applicable to the first embodiment, they may be applied to the first embodiment.

[0075] The backflow prevention member 500 is provided inside the vent cover 300 to prevent backflow of flame or gas. Here, the backflow prevention member 500 can be configured in various ways. For example, it may be configured to rotate in response to the flame or gas, but is not limited to this.

[0076] Referring to Figure 7, the backflow prevention member 500 may include a pivot shaft 510 and a first opening / closing section 520. The pivot shaft 510 may be coupled to the upper surface inside the vent cover 300. The first opening / closing section 520 is rotatably coupled to the pivot shaft 510 and contacts the lower surface of the vent cover 300. The first opening / closing section 520 may be configured to contact the vent cover 300 to the lower left of the pivot shaft 510, as shown in Figure 7, but is not limited to this and can be modified depending on the direction of gas movement.

[0077] Referring to Figure 7, when the gas moves from right to left (see arrow) relative to Figure 7, the first opening / closing section 520 rotates around the pivot shaft 510 and opens. The gas can then be discharged moving from right to left. However, after the gas has passed through the first opening / closing section 520, the first opening / closing section 520 rotates due to gravity and closes, thus preventing the gas from moving in the reverse direction.

[0078] Referring to Figure 8, the backflow prevention member 500 may include a projection 530, an elastic portion 540, and a second opening / closing portion 550.

[0079] The projection 530 protrudes from the vent cover 300. For example, the projection 530 includes a first projection 531 and a second projection 532, the first projection 531 protruding from the upper surface of the vent cover 300 and the second projection 532 protruding from the lower surface of the vent cover 300. Here, the second projection 532 may be configured to be spaced apart from the first projection 531 at a predetermined distance at a position corresponding to the position of the first projection 531.

[0080] The elastic portion 540 is coupled to the projection 530. The elastic portion 540 includes a first elastic portion 541 and a second elastic portion 542, the first elastic portion 541 may be coupled to the first projection 531, and the second elastic portion 542 may be coupled to the second projection 532.

[0081] The second opening / closing section 550 is then connected to the elastic section 540, that is, to the first elastic section 541 and the second elastic section 542, respectively, as shown in Figure 8.

[0082] In this structure, when gas moves from right to left (see arrow) relative to Figure 8, the second opening / closing section 550 opens. The gas can then be discharged by moving from right to left relative to Figure 8 along the direction of the arrow. However, after the gas has passed through the second opening / closing section 550, the second opening / closing section 550 is closed by the elastic force of the elastic section 540, thus preventing the gas from moving in the reverse direction.

[0083] Figure 9 is a plan view of a portion of a battery pack according to the fourth embodiment of the present invention. Figure 10 is a plan view of a portion of a battery pack according to the fifth embodiment of the present invention.

[0084] The fourth and fifth embodiments of the present invention differ from the other embodiments in that they include a path expansion member 600. However, the parts of the fourth or fifth embodiment that are common with the parts described in the other embodiments will be described in the preceding explanation. Also, the parts of the fourth or fifth embodiment that are applicable to the other embodiments may be applied to the other embodiments.

[0085] The path expansion member 600 is provided in the cavity inside the vent cover 300 to expand the exhaust path for flame or gas. That is, the path expansion member 600 lengthens the travel path for flame or gas, allowing the flame or hot gas (or hot spark, etc.) to cool down or extinguish as it travels.

[0086] Referring to Figure 9, the path expansion member 600 may include at least one first projection 610 and at least one second projection 620. Here, at least one first projection 610 protrudes from a first portion of the vent cover 300, and at least one second projection 620 protrudes from a second portion of the vent cover 300.

[0087] Here, the first protrusion 610 and the second protrusion 620 are arranged alternately, and the effect is that the temperature decreases as the flame or gas moves in a zigzag pattern between the first protrusion 610 and the second protrusion 620 (see arrow in Figure 9).

[0088] Referring to Figure 10, the path expansion member 600 may include at least one first projection 610 and at least one second projection 620. Here, at least one first projection 610 protrudes from a first portion of the vent cover 300, and at least one second projection 620 protrudes from a second portion of the vent cover 300.

[0089] Here, the first projection 610 is positioned to be inclined toward the second portion, and the second projection 620 is positioned to be inclined toward the first portion. This has the effect of reducing the temperature as the flame or gas moves inclined between the first projection 610 and the second projection 620 (see arrow in Figure 10).

[0090] Figure 11 is a diagram illustrating an automobile including a battery pack according to each embodiment of the present invention.

[0091] Referring to Figure 11, an automobile 20 according to one embodiment of the present invention may include one or more battery packs 10 according to the embodiments described above. Here, the automobile 20 includes, for example, various automobiles that use electricity, such as electric vehicles and hybrid vehicles.

[0092] In this specification, terms indicating direction such as up, down, left, right, front, and back are used. However, such terms indicate relative positions and are used only for the convenience of explanation. It is obvious to those skilled in the art that these positions can change depending on the position of the object in question, the observer's position, etc.

[0093] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and of course, various modifications and variations are possible within the equivalent scope of the technical concept of the present invention and the claims below by persons with ordinary skill in the art to which the present invention pertains. Therefore, the embodiments described above should be considered from an explanatory rather than restrictive viewpoint. That is, the true technical concept of the present invention is shown in the claims, and all differences within the equivalent scope thereto should be interpreted as being included in the present invention. [Industrial applicability]

[0094] The present invention relates to a battery module pack and an automobile containing the same, and is particularly applicable to the secondary battery industry.

Claims

1. Multiple battery modules, each consisting of multiple battery cells stacked on top of each other, A pack case in which the aforementioned multiple battery modules are housed, A vent path is formed through which flames or gases generated in the battery cells are discharged, and a vent cover is coupled to the pack case, The vent cover has connecting holes formed in it. The battery module is connected to the connecting hole, The aforementioned pack case includes an upper frame, The battery pack is characterized in that the vent cover is attached to the upper part of the upper frame.

2. The battery pack according to claim 1, characterized in that the upper frame has movable holes through which flames or gases can move.

3. The battery pack according to claim 2, characterized in that the inside of the vent cover is hollow to allow flames or gases to move.

4. The battery module includes the upper module case. The battery pack according to claim 1, characterized in that the upper module case has an exhaust hole formed therein through which flames or gases are discharged, and the exhaust hole is connected to the exhaust path of the vent cover.

5. The battery pack according to claim 4, characterized in that it includes a connecting portion that connects the discharge hole and the discharge path.

6. The battery pack according to claim 5, characterized in that the connecting portion is composed of a gasket or sealing member to prevent leakage of flames or gases.

7. The battery pack according to claim 1, characterized in that it includes a backflow prevention member provided in the vent cover to prevent backflow of flames or gases.

8. The battery pack according to claim 7, characterized in that the backflow prevention member is configured to rotate by a flame or gas.

9. The aforementioned backflow prevention member is A pivot shaft connected to the upper surface of the vent cover, The battery pack according to claim 8, further comprising a first opening / closing portion that is rotatably connected to the pivot shaft and contacts the lower surface of the vent cover.

10. The aforementioned backflow prevention member is A projection protruding from the vent cover, The elastic part that is bonded, The battery pack according to claim 7, further comprising a second opening / closing part coupled to the elastic part.

11. The aforementioned protrusion is A first projection protruding from the upper surface of the vent cover, The battery pack according to claim 10, further comprising: a second projection that protrudes from the lower surface of the vent cover at a position corresponding to the position of the first projection and is spaced apart from the first projection at a predetermined distance.

12. The elastic portion is A first elastic portion coupled to the first projection, The battery pack according to claim 11, further comprising a second elastic portion coupled to the second projection.

13. The battery pack according to claim 1, characterized in that it includes a path expansion member provided in the vent cover for expanding the flame or gas exhaust path.

14. The aforementioned path expansion member is At least one first projection protruding from the first portion of the vent cover, It includes at least one second projection protruding from the second portion of the vent cover, The battery pack according to claim 13, characterized in that the first protrusion and the second protrusion are arranged alternately.

15. The aforementioned path expansion member is At least one first projection protruding from the first portion of the vent cover, It includes at least one second projection protruding from the second portion of the vent cover, The first projection is arranged to be inclined toward the second portion. The battery pack according to claim 13, characterized in that the second protrusion is arranged to be inclined toward the first portion.

16. An automobile comprising at least one battery pack according to any one of claims 1 to 15.

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