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 includes: a plurality of battery modules, each having a plurality of stacked battery cells; a pack case in which the plurality of battery modules are accommodated; and a fastening member fastening the pack case, wherein the fastening member has at least a part thereof coupled to the pack case and configured to break when the pressure inside the pack case increases.

Description

Battery pack and vehicle including same

[0001] This application claims priority to Korean Patent Application No. 10-2024-0050781, filed on April 16, 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 include battery modules in which a plurality of battery cells are stacked and inserted into a module case that is equipped with a module case that can protect the battery cells, and battery packs including a plurality of battery modules.

[0007] Figure 1 is a cross-sectional view of a conventional battery pack.

[0008] Referring to Fig. 1, in the case of a conventional battery pack (1), the upper frame (2) is fixed to the bulkhead frame (4) by bolts (3). That is, in the conventional battery pack (1), since the upper frame (2) is firmly fixed by bolts (3), no free space or buffer space is formed through which heat or gas caused by the flame can move when a flame occurs.

[0009] In this state, if a flame occurs in the battery cell (5), the heat caused by the flame is blocked by the upper frame (2) and cannot spread, but is concentrated within the battery module (6) where the flame occurred. In addition, since the gas generated within the battery module (6) cannot be discharged, the internal pressure increases and the possibility of explosion of the battery module (6) or battery pack (1) increases.

[0010] At this time, if an explosion occurs in the battery module (6) where the flame occurred, the flame may spread to other battery modules (6) 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.

[0011] Alternatively, there is a problem in that the battery module (6) 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 (6) or battery pack (1).

[0012] 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 by evenly dispersing heat caused by a flame within the battery pack when a flame occurs from a single battery cell, thereby achieving uniform thermal distribution.

[0013] In addition, the present invention provides a battery pack and a vehicle including the same, which enable easy venting and easy discharge of gases.

[0014] 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.

[0015] 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.

[0016] 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 fastening member fastening the pack case, wherein at least a portion of the fastening member is coupled to the pack case and is characterized in that it is broken when pressure inside the pack case increases.

[0017] In one embodiment, the fastening member includes a bolt and a first nut, wherein the first nut is coupled to the pack case and can be broken by pressure.

[0018] In one embodiment, the pack case includes an upper frame; and a bulkhead frame fastened to the upper frame by the fastening member, wherein the first nut can be coupled to an upper side of the bulkhead frame.

[0019] In one embodiment, the fastening member includes a second nut coupled to the upper frame, and the bolt can be fastened to each of the first nut and the second nut.

[0020] In one embodiment, the second nut may be welded to the upper frame.

[0021] In one embodiment, the second nut may be separate from the first nut.

[0022] In one embodiment, the second nut may be in contact with the first nut or may be spaced apart from the first nut by a preset interval.

[0023] In one embodiment, the stiffness of the bolt and the second nut may be greater than the stiffness of the first nut.

[0024] In one embodiment, the materials of the bolt and the second nut and the material of the first nut may be different from each other.

[0025] In one embodiment, even if the pressure inside the pack case increases and the first nut is broken, the bolt and the second nut can be configured to maintain their shape.

[0026] In one embodiment, the first nut may be bonded to the upper side of the bulkhead frame via an adhesive.

[0027] In one embodiment, when the pressure inside the pack case increases and the first nut is broken, the bolt may be separated from the bulkhead frame, causing the upper frame to deform upward, and a buffer space may be formed between the upper frame and the battery module.

[0028] In one embodiment, a venting portion is formed in the pack case, and when the upper frame is deformed, gas generated from the battery cell can move to the venting portion.

[0029] In one embodiment, the venting portion may include a venting hole through which the gas generated from the battery cell is discharged; and a venting valve that closes the venting hole and opens when the internal pressure of the pack case exceeds a preset value.

[0030] Meanwhile, according to another aspect of the present invention, a vehicle including at least one battery pack as described above can be provided.

[0031] Embodiments of the present invention have the effect of preventing heat concentration by evenly dispersing heat caused by a flame within a battery pack when a flame occurs from one battery cell, thereby achieving uniform thermal distribution.

[0032] Additionally, it has the effect of facilitating venting, allowing gas to be discharged easily.

[0033] Additionally, it has the effect of preventing thermal runaway by preventing a chain reaction of flames due to flame propagation.

[0034] However, the effects that can be obtained through the present invention are not limited to the effects described above, and other technical effects that are not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0035] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0036] Figure 1 is a cross-sectional view of a conventional battery pack.

[0037] Figure 2 is an exploded perspective view of a battery pack according to one embodiment of the present invention.

[0038] FIG. 3 is a cross-sectional view of a battery pack according to one embodiment of the present invention, wherein a bolt is separated from a first nut fixed to a bulkhead frame and a second nut coupled to an upper frame.

[0039] Figure 4 is a drawing showing the bolt in Figure 3 coupled to the first nut and the second nut.

[0040] FIG. 5 is a drawing showing the first nut in FIG. 4 being broken by pressure and the bolt being separated from the first nut.

[0041] FIG. 6 is a cross-sectional view showing a battery pack according to one embodiment of the present invention in which a buffer space is formed when the first nut is broken and the upper frame is deformed.

[0042] Fig. 7 is a perspective view of a battery pack according to a modified embodiment of the present invention, with only a portion shown.

[0043] FIG. 8 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0044] 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 modifications may exist as of the time of this application.

[0045] 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.

[0046] 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.

[0047] FIG. 2 is an exploded perspective view of a battery pack according to one embodiment of the present invention, FIG. 3 is a cross-sectional view of a battery pack according to one embodiment of the present invention in which a bolt is separated from a first nut fixed to a bulkhead frame and a second nut coupled to an upper frame, FIG. 4 is a view showing a bolt coupled to the first nut and the second nut in FIG. 3, FIG. 5 is a view showing a bolt being separated from the first nut in FIG. 4 when the first nut is broken by pressure, and FIG. 6 is a cross-sectional view showing a buffer space formed when the upper frame is deformed due to a break in the first nut in the battery pack according to one embodiment of the present invention.

[0048] Referring to FIG. 2, a battery pack (10) according to one embodiment of the present invention may be configured to include a plurality of battery modules (100), a pack case (200), and a fastening member (300).

[0049] The battery module (100) is housed in a pack case (200). Furthermore, a plurality of battery cells (110, see FIG. 6) are stacked on each battery module (100), and a plurality of battery modules (100) may be arranged in various ways. For example, the battery modules (100) may be arranged in horizontal and vertical directions, but are not limited thereto.

[0050] Referring to FIG. 6, a battery module (100) may have a plurality of battery cells (110) and a module case (120).

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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).

[0055] 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.

[0056] 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).

[0057] 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.

[0058] 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.

[0059] 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. However, the present invention is not limited thereto. Here, the module case (120) may include an upper module case, a lower module case, and a side module case.

[0060] 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.

[0061] Referring to FIG. 2, 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).

[0062] Referring to FIGS. 2 and 6, the upper frame (210) is coupled to the side frame (230) and the bulkhead frame (240). Here, the bulkhead frame (240) is coupled by a fastening member (300) configured to be broken when the pressure inside the pack case (200) increases.

[0063] For example, the fastening member (300) may include a bolt (310) and a first nut (320), wherein the first nut (320) may be configured to break when the pressure inside the pack case (200) increases. In addition, the first nut (320) may be coupled to the bulkhead frame (240). In addition, the bolt (310) is coupled to the first nut (320).

[0064] That is, referring to FIG. 4, the inner side of the upper frame (210) can be connected to the bulkhead frame (240) by a fastening member (300), for example, a bolt (310) and a first nut (320). In addition, the upper frame (210) is also fixed to the side frame (230) by the bolt (310).

[0065] And, when a thermal event occurs in the battery cell (110), etc., the upper frame (210) is still fixed to the side frame (230) by the bolt (310), but the first nut (320) of the fastening member (300) that fastens the bulkhead frame (240) is broken when the pressure inside the pack case (200) increases, so the upper frame (210) is separated from the bulkhead frame (240).

[0066] Accordingly, in a thermal event situation, the upper frame (210) is separated from the bulkhead frame (240) (see FIG. 6), so that a buffer space (400) can be formed between the upper frame (210) and the bulkhead frame (240). A detailed description thereof will be provided later.

[0067] 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).

[0068] 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).

[0069] And, 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 (230) and a relatively short short side frame (230). Alternatively, the lengths of the side frames (230) may all be the same.

[0070] The bulkhead frame (240) extends upward from 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).

[0071] The bulkhead frame (240) can be joined to the inside of the upper frame (210) by a fastening member (300), for example, a bolt (310) and a first nut (320).

[0072] The fastening member (300) fastens the pack case (200), and is configured to fasten, for example, the upper frame (210) and the bulkhead frame (240) of the pack case (200). Here, at least a portion of the fastening member (300), for example, the first nut (320), is coupled to the pack case (200) and is configured to be broken when the pressure inside the pack case (200) increases.

[0073] And, at least a part of the fastening member (300) is fixed to the pack case (200). Referring to FIG. 3, for example, the fastening member (300) may include a bolt (310) and a first nut (320), and the first nut (320) may be configured to be coupled to the pack case (200) and broken by pressure. That is, in the battery pack (10) according to one embodiment of the present invention, the first nut (320) is configured to be broken when the internal pressure of the pack case (200) increases.

[0074] And, as in FIG. 3, for example, the first nut (320) can be coupled to the upper side of the bulkhead frame (240) of the pack case (200).

[0075] And, as described above, the first nut (320) configured to be broken by pressure increase and the bolt (310) fastened to the first nut (320) fasten the upper frame (210) and the bulkhead frame (240).

[0076] Referring to FIGS. 3 and 4, the first nut (320) can be coupled to the upper side of the bulkhead frame (240) in various ways. If the first nut (320) is made of a weldable material, it can be coupled to the bulkhead frame (240) by welding. Or, if the first nut (320) is made of a non-weldable material, for example, plastic, it can be coupled to the upper side of the bulkhead frame (240) by adhesive.

[0077] Referring to FIGS. 3 to 5, the fastening member (300) may include a second nut (330) coupled to the upper frame (210), in which case the bolt (310) is fastened to the first nut (320) and the second nut (330), respectively.

[0078] As described above, the second nut (330) is coupled to the upper frame (210), and here, the way in which the second nut (330) is coupled to the upper frame (210) may be various, and for example, it may be coupled by welding, but is not limited thereto.

[0079] In Fig. 4, the second nut (330) is only in contact with the first nut (320), and they are not coupled to each other, and the second nut (330) is separated from the first nut (320). In addition, in Fig. 4, the second nut (330) and the first nut (320) are in contact with each other, but the second nut (330) and the first nut (320) may be spaced apart by a preset interval.

[0080] Referring to FIG. 4, the bolt (310) is coupled to a first nut (320) coupled to the upper frame (210) to first fasten the upper frame (210) and the bulkhead frame (240), and further, the bolt (310) is coupled to a second nut (330) to second fasten the upper frame (210) and the bulkhead frame (240).

[0081] Here, when a thermal event occurs in the battery cell (110), etc., the first nut (320) is broken by the pressure. And, as shown in FIG. 5, when the first nut (320) fastened to the bolt (310) is broken, the bolt (310) is separated from the first nut (320), and the upper frame (210) together with the bolt (310) are separated from the bulkhead frame (240).

[0082] Referring to FIG. 6, when a flame occurs in the battery cell (110) and the pressure inside the pack case (200) increases, causing the first nut (320) to break, the bolt (310) is separated from the bulkhead frame (240), causing the upper frame (210) to deform upward, thereby forming a buffer space (400) between the upper frame (210) and the battery module (100).

[0083] That is, the upper frame (210) is deformed upward by the flame and gas generated from the battery cell (110), thereby forming a buffer space (400), and as the heat from the flame spreads to other battery modules (100) through the buffer space (400), an overall uniform thermal distribution is achieved, and heat can be prevented from being concentrated in any one battery module (100).

[0084] Here, the rigidity of the bolt (310) and the second nut (330) may be configured to be greater than the rigidity of the first nut (320). That is, the rigidity of the bolt (310) may be greater than the rigidity of the first nut (320), and further, the rigidity of the second nut (330) may be configured to be greater than the rigidity of the first nut (320).

[0085] To this end, the bolt (310), the second nut (330), and the first nut (320) may be made of different materials. For example, the bolt (310) and the second nut (330) may be made of metal, while the first nut (320) may be made of plastic. However, the materials of the bolt (310), the first nut (320), and the second nut (330) are not limited thereto.

[0086] In this way, if the rigidity of the bolt (310) and the second nut (330) is greater than the rigidity of the first nut (320), even if the pressure inside the pack case (200) increases and the first nut (320) is damaged, the bolt (310) and the second nut (330) can maintain their shape without being damaged.

[0087] And, even if a thermal event occurs, if the bolt (310) and the second nut (330) maintain their original shape, the fastening hole (211, see FIG. 2) of the upper frame (210) through which the bolt (310) passes is blocked by the bolt (310) and the second nut (330), so that the inflow of oxygen through the fastening hole (211) is blocked, and also, the internal flame eruption is blocked, so that there is an effect of preventing flame propagation.

[0088] Fig. 7 is a perspective view of a battery pack according to a modified embodiment of the present invention, with only a portion shown.

[0089] Referring to Fig. 7, there is a difference from the aforementioned embodiment in that a venting portion (250) is formed in the pack case (200). However, among the modified embodiments, the common content described in the aforementioned embodiment is replaced with the description of the aforementioned embodiment. In addition, the content applicable to the aforementioned embodiment among the portions described in the modified embodiments may be applied to the aforementioned embodiment.

[0090] Referring to Fig. 7, a venting portion (250) is formed in the pack case (200). As described above, when the internal pressure of the pack case (200) increases, causing the first nut (320) to break and the upper frame (210) to deform, gas generated from the battery cell (110) may move to the venting portion (250) and be discharged.

[0091] Here, the venting portion (250) may include a venting hole (251) and a venting valve (252). The venting hole (251) is a hole through which gas generated from the battery cell (110) is discharged, and may be formed in the pack case (200), for example, the side frame (230), but is not limited thereto.

[0092] In addition, a venting valve (252) may be installed in the venting hole (251). The venting valve (252) may be configured in various ways. For example, the venting valve (252) may be configured to close the venting hole (251) and open when the internal pressure of the pack case (200) exceeds a preset value.

[0093] That is, the venting valve (252) normally blocks the venting hole (251), but when gas leaks from the battery cell (110) and the internal pressure of the pack case (200) exceeds a preset value or range, the venting valve (252) opens and the gas is discharged from the pack case (200) through the venting hole (251).

[0094] As described above, when the upper frame (210) is deformed upwards by the flame and gas generated from the battery cell (110) to form a buffer space (400), the gas moves along the buffer space (400) to the venting portion (250), and when the venting valve (252) is opened by the pressure of the gas, the gas can be discharged outside the pack case (200).

[0095] That is, the venting is facilitated by the buffer space (400) formed by the deformation of the upper frame (210), so that gas can be easily discharged.

[0096] And, as described above, as the heat spreads to other battery modules (100) through the buffer space (400), concentration of heat in any one battery module (100) is prevented, thereby enabling uniform thermal distribution.

[0097] In addition, since the gas discharge is facilitated by the buffer space (400) formed between the upper frame (210) and the battery module (100), ultimately, a chain reaction of flames due to flame propagation is prevented, thereby preventing a thermal runaway phenomenon.

[0098] FIG. 8 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0099] Referring to FIG. 8, 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.

[0100] 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.

[0101] 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.

[0102] 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 Includes a fastening member for fastening the above pack case, A battery pack characterized in that at least a portion of the fastening member is coupled to the pack case and is broken when the pressure inside the pack case increases.

2. In paragraph 1, The above fastening member includes a bolt and a first nut, A battery pack characterized in that the first nut is coupled to the pack case and is broken by pressure.

3. In paragraph 2, The above pack case is, upper frame; and It includes a bulkhead frame that is connected to the upper frame by the above-mentioned fastening member, A battery pack, characterized in that the first nut is coupled to the upper side of the bulkhead frame.

4. In paragraph 3, The above fastening member includes a second nut coupled to the upper frame, A battery pack, characterized in that the bolts are each fastened to the first nut and the second nut.

5. In paragraph 4, A battery pack characterized in that the second nut is welded to the upper frame.

6. In paragraph 4, A battery pack, characterized in that the second nut is separated from the first nut.

7. In paragraph 6, A battery pack characterized in that the second nut is in contact with the first nut or is spaced apart from it by a preset interval.

8. In paragraph 4, A battery pack characterized in that the rigidity of the bolt and the second nut is greater than the rigidity of the first nut.

9. In paragraph 4, A battery pack characterized in that the materials of the bolt and the second nut are different from the materials of the first nut.

10. In paragraph 4, A battery pack characterized in that the bolt and the second nut are configured to maintain their shape even if the pressure inside the pack case increases and the first nut is broken.

11. In paragraph 3, A battery pack, characterized in that the first nut is bonded to the upper side of the bulkhead frame via an adhesive.

12. In paragraph 3, A battery pack characterized in that when the pressure inside the pack case increases and the first nut is broken, the bolt is separated from the bulkhead frame, the upper frame is deformed upward, and a buffer space is formed between the upper frame and the battery module.

13. In paragraph 3, A venting portion is formed in the above pack case, A battery pack characterized in that when the upper frame is deformed, gas generated from the battery cell moves to the venting portion.

14. In paragraph 13, The above venting part, A venting hole through which the gas generated from the battery cell is discharged; and A battery pack characterized by including a venting valve that closes the venting hole and opens when the internal pressure of the pack case exceeds a preset value.

15. A vehicle comprising at least one battery pack according to any one of paragraphs 1 to 14.

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