Battery pack and vehicle including same

Abstract

Disclosed are a battery pack and a vehicle including same. The battery pack according to an embodiment of the present invention comprises: a plurality of battery modules in which a plurality of battery cells are stacked; a pack case housing the plurality of battery modules; and a venting cover coupled to the pack case and provided with a discharge path by which flame or gas from the battery cells can be discharged.

Description

Battery pack and vehicle including same

[0001] This application claims priority to Korean Patent Application No. 10-2024-0048905, filed on April 11, 2024, and all contents disclosed in the specification and drawings of the said application are incorporated herein by reference.

[0002] The present invention relates to a battery pack and a vehicle including the same, and more particularly, to a battery pack and a vehicle including the same, which can evenly spread heat and smoothly discharge gas when a thermal event occurs.

[0003] Generally, secondary batteries refer to batteries that can be repeatedly charged and discharged, such as lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. A battery cell, the most basic type of secondary battery, can provide an output voltage of approximately 2.5 V to 4.2 V.

[0004] Recently, as these battery cells are applied to devices that require high output voltage and large charging capacity, such as electric vehicles and Energy Storage Systems (ESS), battery modules composed of multiple battery cells connected in series, parallel, or a combination of series and parallel, and battery packs composed of these battery modules connected again in series, parallel, or a combination of series and parallel, are widely used.

[0005] Lithium secondary batteries are currently in the spotlight due to their advantages such as high operating voltage and significantly higher energy density. However, because they use organic electrolytes, there is a problem that lithium secondary batteries can cause overcurrent and overheating when overcharged, which in severe cases can cause fire due to explosion or ignition.

[0006] Various types of secondary batteries may include a battery module in which a plurality of battery cells are stacked and inserted into a module case that is provided with a module case that can protect the battery cells, and a battery pack including a plurality of battery modules.

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

[0008] Referring to Fig. 1, in the case of a conventional battery pack (1), when a thermal event occurs, flames or gas are blocked by the upper frame (2) of the battery pack (1) and cannot be easily discharged upwards, but move to the left or right (see the arrows in Fig. 1), and as the internal pressure increases, the possibility of explosion of the battery module (3) or battery pack (1) increases.

[0009] At this time, if an explosion occurs in the battery module (2) where the flame occurred, the flame may spread to other battery modules (2) and a thermal runaway phenomenon may occur. If the flame leaks out due to this 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) is damaged or burned down by a chain reaction of flames due to flame propagation, making it impossible to secure the stability of the battery module (2) or battery pack (1).

[0011] Accordingly, the technical problem to be achieved by the present invention is to provide a battery pack and an automobile including the same, which can prevent heat concentration or heat energy trapping by evenly dispersing the flame and the heat caused by the flame within the battery pack when a flame occurs from any one battery cell, thereby achieving uniform thermal distribution.

[0012] In addition, the present invention provides a battery pack and a vehicle including the same, which enable easy venting and easy discharge of gases.

[0013] In addition, the present invention provides a battery module capable of preventing a thermal runaway phenomenon by preventing a chain reaction of flames due to flame propagation, a battery pack including the same, and a vehicle.

[0014] However, the technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0015] According to one aspect of the present invention, a battery pack may be provided, comprising: 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 accommodated; and a venting cover coupled to the pack case, wherein a discharge path is formed through which flames or gases generated from the battery cells can be discharged.

[0016] In one embodiment, the pack case includes an upper frame, a moving hole through which flame or gas moves is formed in the upper frame, and the venting cover can be coupled to the upper side of the upper frame.

[0017] In one embodiment, the interior of the venting cover may be formed hollow so that flames or gases can move.

[0018] In one embodiment, a connecting hole is formed in the venting cover, and the battery module can be connected to the connecting hole.

[0019] In one embodiment, the battery module includes an upper module case, and an exhaust hole through which flame or gas can be exhausted is formed in the upper module case, and the exhaust hole can be connected to the exhaust path of the venting 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 comprised of a gasket or sealing member that prevents flame or gas from escaping.

[0022] In one embodiment, a backflow prevention member may be installed in the venting cover to prevent backflow of flame or gas.

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

[0024] In one embodiment, the backflow prevention member may include a rotational shaft coupled to the upper side of the venting cover; and a first opening / closing part rotatably coupled to the rotational shaft and in contact with the lower side of the venting cover.

[0025] In one embodiment, the backflow prevention member may include a protrusion protruding from the venting cover; an elastic member coupled to the protrusion; and a second opening / closing member coupled to the elastic member.

[0026] In one embodiment, the protrusion may include a first protrusion protruding from the upper side of the venting cover; and a second protrusion protruding from the lower side of the venting cover at a position corresponding to the position of the first protrusion and spaced apart from the first protrusion by a preset interval.

[0027] In one embodiment, the elastic member may include a first elastic member coupled to the first protrusion; and a second elastic member coupled to the second protrusion.

[0028] In one embodiment, a path expansion member may be installed in the venting cover to expand the path for exhausting flames or gases.

[0029] In one embodiment, the path extension member includes at least one first protrusion protruding from a first portion of the venting cover; and at least one second protrusion protruding from a second portion of the venting cover, wherein the first protrusion and the second protrusion may be arranged in a zigzag shape with respect to each other.

[0030] In one embodiment, the path extension member includes at least one first protrusion protruding from a first portion of the venting cover; and at least one second protrusion protruding from a second portion of the venting cover, wherein the first protrusion may be arranged to be inclined toward the second portion, and the second protrusion may be arranged to be inclined toward the first portion.

[0031] Meanwhile, according to another aspect of the present invention, a vehicle including at least one battery pack as described above can be provided.

[0032] Embodiments of the present invention have the effect of preventing heat concentration or heat energy trapping by evenly dispersing the flame and heat caused by the flame within the battery pack when a flame occurs from one battery cell, thereby achieving a uniform thermal distribution.

[0033] Additionally, it has the effect of facilitating venting, allowing gas to be discharged easily.

[0034] Additionally, it has the effect of preventing thermal runaway by preventing a chain reaction of flames due to flame propagation.

[0035] However, the effects that can be obtained through the present invention are not limited to the effects described above, and other technical effects not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0036] Figure 1 is a perspective view of a conventional battery pack.

[0037] Figure 2 is a perspective view of the entire battery pack according to the first embodiment of the present invention.

[0038] Figure 3 is an exploded perspective view of a battery pack according to the first embodiment of the present invention.

[0039] Figure 4 is a cross-sectional view taken along line A-A' of Figure 2.

[0040] Figure 5 is an enlarged view of part B of Figure 3.

[0041] Fig. 6 is a drawing showing a connection part connected to the battery module of Fig. 5.

[0042] Figure 7 is a cross-sectional view of a battery pack according to a second embodiment of the present invention.

[0043] Figure 8 is a cross-sectional view of a battery pack according to a third embodiment of the present invention.

[0044] FIG. 9 is a plan view of a battery pack according to a fourth embodiment of the present invention, showing only a portion thereof.

[0045] FIG. 10 is a plan view of a battery pack according to a fifth embodiment of the present invention, showing only a portion thereof.

[0046] FIG. 11 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0047] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Terms or words used in this specification and claims should not be interpreted as limited to their conventional or dictionary meanings, but should be interpreted with meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to best explain his or her own invention. Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of ​​the present invention, and various equivalents and modified examples may exist as of the time of this application.

[0048] In the drawings, the sizes of each component or specific parts of that component are exaggerated, omitted, or schematically illustrated for convenience and clarity of explanation. Therefore, the size of each component does not entirely reflect its actual size. If a detailed description of a related known function or configuration is deemed to unnecessarily obscure the gist of the present invention, such description will be omitted.

[0049] The term 'joint' or 'connection' as used herein includes 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 through a connecting member.

[0050] FIG. 2 is a perspective view of a battery pack according to a first embodiment of the present invention, FIG. 3 is an exploded perspective view of a battery pack according to the first embodiment of the present invention, FIG. 4 is a cross-sectional view taken along line A-A' of FIG. 2, FIG. 5 is an enlarged view of part B of FIG. 3, and FIG. 6 is a drawing showing a connection part connected to the battery module of FIG. 5.

[0051] Referring to FIGS. 2 to 4, a 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 venting cover (300).

[0052] A plurality of battery modules (100) may be provided and arranged in various ways. For example, as shown in FIG. 3, they may be arranged in horizontal and vertical directions, but are not limited thereto.

[0053] Referring to FIG. 4, a battery module (100) may have a plurality of battery cells (110) and a module case (120).

[0054] A plurality of battery cells (110) can be stacked on top of each other. The battery cells (110) can have various structures, and furthermore, the plurality of battery cells (110) can be stacked in various ways.

[0055] The battery cell (110) may have a structure in which a plurality of unit cells arranged in the order of positive plate-separator-negative plate or bi-cells arranged in the order of positive plate-separator-negative plate-separator-positive plate-separator-negative plate are stacked according to the battery capacity.

[0056] The battery cell (110) may be equipped with an electrode lead. The electrode lead is a type of terminal that is exposed to the outside and connected to an external device, and may be made of a conductive material. The electrode lead may include a positive electrode lead and a negative electrode lead.

[0057] The positive electrode lead and the negative electrode lead may be positioned in opposite directions with respect to the longitudinal direction of the battery cell (110), or the positive electrode lead and the negative electrode lead may be positioned in the same direction with respect to the longitudinal direction of the battery cell (110).

[0058] A battery cell (110) may be provided with a plurality of cartridges (not shown) for storing the battery cell (110). Each cartridge (not shown) may be manufactured by injection molding plastic, and a plurality of cartridges (not shown) having a storage portion capable of storing the battery cell (110) may be stacked. A cartridge assembly in which a plurality of cartridges (not shown) are stacked may be provided with a connector element or a terminal element.

[0059] The connector element may include various types of electrical connection components or connecting members for connection to, for example, a BMS (Battery Management System, not shown) that can provide data on the voltage or temperature of the battery cell (110).

[0060] In addition, 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 is provided with a terminal bolt so that it can be electrically connected to the outside. Meanwhile, the battery cell (110) may have various shapes.

[0061] Referring to FIG. 4, a plurality of battery cells (110) are stacked and stored in a module case (120). The module case (120) surrounds the plurality of battery cells (110), thereby protecting the battery cells (110) from external vibrations or shocks.

[0062] The module case (120) may be formed in a shape corresponding to the shape of a stacked body in which a plurality of battery cells (110) are stacked. For example, if the stacked body in which a plurality of battery cells (110) are stacked is formed in a hexahedral shape, the module case (120) may also be formed in a hexahedral shape corresponding thereto, but is not limited thereto. Here, the module case (120) may include an upper module case (121), a lower module case (122), and a side module case (123).

[0063] In addition, the module case (120) can be manufactured by, for example, bending a metal plate, whereby the module case (120) can be manufactured as an integral part. When the module case (120) is manufactured as an integral part, the joining process is simplified and simplified. Alternatively, the module case (120) can be provided in a detachable form and joined by welding or the like. However, the material of the module case (120) is not limited to a metal material.

[0064] Referring to FIGS. 3 and 4, a plurality of battery modules (100) are stored in a pack case (200). The pack case (200) may be configured to include, for example, an upper frame (210), a lower frame (220), a side frame (230), and a bulkhead frame (240).

[0065] Referring to Fig. 2, a venting cover (300) is coupled to the upper frame (210). Here, referring to Figs. 3 and 4, a moving hole (211) through which flame or gas moves may be formed in the upper frame (210). The moving hole (211) of the upper frame (210) may be connected to a connecting hole (320) of the venting cover (300).

[0066] The lower frame (220) is configured to accommodate a plurality of battery modules (100). The lower frame (220) may be formed in a square plate shape, but is not limited thereto. The lower frame (220) forms the bottom of the pack case (200).

[0067] 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 preset space between it and the lower frame (220).

[0068] In addition, a plurality of battery modules (100) are installed in the space between the side frame (230) and the lower frame (220). The side frame (230) may include a relatively long long side frame and a relatively short short side frame. Alternatively, the lengths of the side frames (230) may all be the same.

[0069] The bulkhead frame (240) extends upwardly within the lower frame (220) and is coupled to the side frame (230). One or more bulkhead frames (240) may be provided, and the battery module (100) may be arranged between a plurality of bulkhead frames (240) or between the bulkhead frames (240) and the side frame (230). Here, the bulkhead frames (240) may be arranged in a horizontal or vertical direction within the side frame (230).

[0070] The venting cover (300) is coupled to the pack case (200). For example, referring to FIG. 2, the venting cover (300) may be coupled to the upper side of the upper frame (210) of the pack case (200). And, referring to FIG. 4, a discharge path (310) is formed in the venting cover (300) through which flames or gases generated from the battery cells (110) can be discharged.

[0071] Referring to Fig. 4, the interior of the venting cover (300) may be formed hollow, and the hollow interior of the venting cover (300) may function as a discharge path (310). In addition, the flame or gas generated from the battery cell (110) may be configured to move through the hollow interior of the venting cover (300).

[0072] Here, the flame or gas may be configured to move only in one direction of the venting cover (300), or may be configured to move in both directions of the venting cover (300).

[0073] Referring to FIG. 4, a connecting hole (320) may be formed in the venting cover (300), and a battery module (100) may be connected to the connecting hole (320), and flames or gases generated from the battery cell (110) may move to the hollow space inside the venting cover (300) through the connecting hole (320).

[0074] To explain this in detail, as described above, the module case (120) of the battery module (100) may include an upper module case (121), and with reference to FIG. 5, an exhaust hole (125) through which flames or gas may be exhausted may be formed in the upper module case (121). In addition, the exhaust hole (125) may be connected to the exhaust path (310) of the venting cover (300) in various ways.

[0075] For example, referring to FIGS. 4, 5 and 6 together, the discharge hole (125) formed in the upper module case (121), the moving hole (211) formed in the upper frame (210), and the connecting hole (320) formed in the venting cover (300) are connected to each other and can be connected through the connecting portion (400).

[0076] That is, the connecting portion (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 to the discharge path (310) through the connecting portion (400).

[0077] The connecting portion (400) may be configured in various ways, and may be configured as a gasket or sealing member that prevents flame or gas from escaping, for example. That is, in this case, the connecting portion (400) not only has a sealing function that prevents flame or gas from escaping, but also has a function of connecting the discharge hole (125), the moving hole (211), and the connecting hole (320).

[0078] However, it is not limited thereto, and the connecting portion (400) may be made of various materials and configured to form a connecting passage through which flame or gas can move.

[0079] Referring to FIG. 4, flames or gases generated from battery cells (110) inside a battery module (100) are discharged to the outside of the module case (120) through the discharge hole (125) and move to the discharge path (310) inside the venting cover (300) through the connecting portion (400) connecting the discharge hole (125), the moving hole (211), and the connecting hole (320).

[0080] And, as described above, a hollow discharge path (310) can be formed inside the venting cover (300), so that flame or gas that has moved into the inside of the venting cover (300) through the connecting portion (400) and the connecting hole (320) can move along the discharge path (310) inside the venting cover (300) and be discharged.

[0081] In this way, when a flame occurs from one battery cell (110), the flame inside the battery pack (10) and the heat caused by the flame are evenly spread along the discharge path (310) inside the venting cover (300), thereby preventing heat concentration or heat energy trapping, and also having the effect of achieving a uniform thermal distribution.

[0082] In addition, there is an effect that the gas can be easily discharged by making venting smooth through the discharge path (310) of the venting cover (300).

[0083] Additionally, it has the effect of preventing thermal runaway by preventing a chain reaction of flames due to flame propagation.

[0084] FIG. 7 is a cross-sectional view of a battery pack according to a second embodiment of the present invention, and FIG. 8 is a cross-sectional view of a battery pack according to a third embodiment of the present invention.

[0085] The second and third embodiments of the present invention differ structurally from the first embodiment in that they include a backflow prevention member (500). However, any portions of the second or third embodiment that are common to those described in the first embodiment are replaced by the description of the first embodiment described above. Furthermore, any portions of the second or third embodiment that are applicable to the first embodiment may also be applied to the first embodiment.

[0086] The backflow prevention member (500) is installed inside the venting cover (300) to prevent the backflow of flame or gas. Here, the backflow prevention member (500) may be configured in various ways, and for example, may be configured to rotate by flame or gas. However, the present invention is not limited thereto.

[0087] Referring to FIG. 7, the backflow prevention member (500) may include a rotation shaft (510) and a first opening / closing portion (520). The rotation shaft (510) may be coupled to the upper portion inside the venting cover (300). In addition, the first opening / closing portion (520) is rotatably coupled to the rotation shaft (510) and contacts the lower portion of the venting cover (300). The first opening / closing portion (520) may be configured to contact the venting cover (300) at the lower left portion of the rotation shaft (510) as shown in FIG. 7, but is not limited thereto, and may be changed depending on the direction of movement of the gas.

[0088] Referring to Fig. 7, when gas moves from right to left (see arrow) based on Fig. 7, the first opening / closing part (520) is opened by rotation based on the rotation axis (510). Then, the gas can be discharged by moving from right to left. However, after the gas passes through the first opening / closing part (520), the first opening / closing part (520) is closed by rotation due to gravity, thereby preventing the gas from moving in the reverse direction.

[0089] Referring to FIG. 8, the backflow prevention member (500) may include a protrusion (530), an elastic member (540), and a second opening / closing member (550).

[0090] The protrusion (530) protrudes from the venting cover (300). For example, the protrusion (530) may include a first protrusion (531) and a second protrusion (532), wherein the first protrusion (531) protrudes from the upper side of the venting cover (300), and the second protrusion (532) protrudes from the lower side of the venting cover (300). Here, the second protrusion (532) may be configured to be spaced apart from the first protrusion (531) by a preset interval at a position corresponding to the position of the first protrusion (531).

[0091] And, the elastic part (540) is coupled to the protrusion (530). The elastic part (540) may include a first elastic part (541) and a second elastic part (542), and the first elastic part (541) may be coupled to the first protrusion (531), and the second elastic part (542) may be coupled to the second protrusion (532).

[0092] And, the second opening / closing part (550) is connected to the elastic part (540), that is, to the first elastic part (541) and the second elastic part (542) as shown in FIG. 8.

[0093] In this structure, when gas moves from right to left (see arrow) based on Fig. 8, the second opening (550) opens. Then, the gas can be discharged by moving from right to left based on Fig. 8 in the direction of the arrow. However, after the gas passes through the second opening (550), the second opening (550) is closed by the elastic force of the elastic member (540), thereby preventing the gas from moving in the reverse direction.

[0094] FIG. 9 is a plan view of a battery pack according to a fourth embodiment of the present invention, showing only a portion thereof, and FIG. 10 is a plan view of a battery pack according to a fifth embodiment of the present invention, showing only a portion thereof.

[0095] The fourth and fifth embodiments of the present invention differ structurally from the other embodiments in that they include a path expansion member (600). However, any portions common to those described in other embodiments of the fourth or fifth embodiment are replaced by the aforementioned description. Furthermore, any portions described in the fourth or fifth embodiment that are applicable to other embodiments may also be applied to other embodiments.

[0096] The path expansion member (600) is installed in a hollow space inside the venting cover (300) to expand the discharge path of flame or gas. That is, the path expansion member (600) lengthens the movement path of flame or gas, thereby allowing the temperature of flame or high-temperature gas (or high-temperature spark, etc.) to drop or be extinguished while moving.

[0097] Referring to FIG. 9, the path expansion member (600) may include at least one first protrusion (610) and at least one second protrusion (620). Here, at least one first protrusion (610) protrudes from the first part of the venting cover (300). And, at least one second protrusion (620) protrudes from the second part of the venting cover (300).

[0098] Here, the first protrusion (610) and the second protrusion (620) can be arranged in a zigzag shape with respect to each other, and there is an effect of lowering the temperature while the flame or gas moves in a zigzag shape between the first protrusion (610) and the second protrusion (620) (see arrows in FIG. 9).

[0099] Referring to FIG. 10, the path expansion member (600) may include at least one first protrusion (610) and at least one second protrusion (620). Here, at least one first protrusion (610) protrudes from the first part of the venting cover (300). And, at least one second protrusion (620) protrudes from the second part of the venting cover (300).

[0100] Here, the first protrusion (610) is arranged to be inclined toward the second portion, and furthermore, the second protrusion (620) is arranged to be inclined toward the first portion. This has the effect of lowering the temperature while the flame or gas moves inclinedly between the first protrusion (610) and the second protrusion (620) (see arrows in Fig. 10).

[0101] FIG. 11 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0102] Referring to FIG. 11, a vehicle (20) according to one embodiment of the present invention may include one or more battery packs (10) according to each of the embodiments described above. Here, the vehicle (20) includes various types of vehicles that are designed to use electricity, such as electric vehicles or hybrid vehicles.

[0103] In this specification, when terms indicating directions such as up, down, left, and right are used, these terms are only for convenience of explanation, and it is obvious to those skilled in the art that these terms may vary depending on the location of the target object or the location of the observer.

[0104] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and those skilled in the art to which the present invention pertains may make various modifications and variations within the scope of the technical spirit of the present invention and the equivalent scope of the claims to be described below. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. In other words, the true scope of the technical spirit of the present invention is set forth in the claims, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

[0105] The present invention relates to a battery pack and an automobile including the same, and is particularly applicable to industries related to secondary batteries.

Claims

1. Multiple battery modules in which multiple battery cells are stacked; A pack case in which the plurality of battery modules are stored; and A battery pack comprising a venting cover coupled to the pack case, wherein an exhaust path is formed through which flames or gases generated from the battery cells can be exhausted.

2. In paragraph 1, The above pack case includes an upper frame, A moving hole through which flame or gas moves is formed in the upper frame, A battery pack characterized in that the venting cover is coupled to the upper side of the upper frame.

3. In paragraph 2, A battery pack characterized in that the inside of the above venting cover is formed hollow so that flame or gas can move.

4. In paragraph 3, A connecting hole is formed in the above venting cover, A battery pack characterized in that the battery module is connected to the connection hole.

5. In paragraph 1, The above battery module includes an upper module case, A battery pack characterized in that a discharge hole is formed in the upper module case through which flame or gas can be discharged, and the discharge hole is connected to the discharge path of the venting cover.

6. In paragraph 5, A battery pack characterized by including a connecting portion connecting the discharge hole and the discharge path.

7. In paragraph 6, A battery pack characterized in that the above connection part is composed of a gasket or sealing member that prevents flame or gas from escaping.

8. In paragraph 1, A battery pack characterized in that it includes a backflow prevention member installed in the venting cover to prevent backflow of flame or gas.

9. In paragraph 8, A battery pack characterized in that the above-mentioned anti-reflux member is configured to rotate by flame or gas.

10. In paragraph 9, The above-mentioned backflow prevention member is, A rotating shaft coupled to the upper side of the above venting cover; and A battery pack characterized by including a first opening / closing part that is rotatably coupled to the rotation axis and contacts the lower side of the venting cover.

11. In paragraph 8, The above-mentioned backflow prevention member is, A protrusion protruding from the above venting cover; an elastic member coupled to the above protrusion; and A battery pack characterized by including a second opening / closing part coupled to the elastic part.

12. In paragraph 11, The above protrusion is, A first projection protruding from the upper side of the venting cover; and A battery pack characterized in that it includes a second protrusion protruding from the lower side of the venting cover at a position corresponding to the position of the first protrusion and spaced apart from the first protrusion by a preset interval.

13. In paragraph 12, The above elastic part, a first elastic member coupled to the first protrusion; and A battery pack characterized by including a second elastic member coupled to the second protrusion.

14. In paragraph 1, A battery pack characterized in that it includes a path expansion member installed in the venting cover to expand the path of flame or gas discharge.

15. In paragraph 14, The above path extension member is, At least one first protrusion protruding from the first part of the venting cover; and At least one second protrusion protruding from the second part of the venting cover, A battery pack characterized in that the first protrusion and the second protrusion are arranged in a zigzag shape with respect to each other.

16. In paragraph 14, The above path extension member is, At least one first protrusion protruding from the first part of the venting cover; and At least one second protrusion protruding from the second part of the above venting cover, The first protrusion is arranged to be inclined toward the second portion, A battery pack characterized in that the second protrusion is arranged to be inclined toward the first portion.

17. A vehicle comprising at least one battery pack according to any one of claims 1 to 16.

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