Battery pack and vehicle including the same

Abstract

A battery pack according to the present invention may include: a battery module; a pack tray having an open top and accommodating the battery module inside; a pack cover disposed on the upper part of the pack tray so as to seal the accommodating space in which the battery module is accommodated; and a variable venting channel section that partitions the accommodating space and provides a venting channel that deforms to discharge the venting gas when the accommodating space expands in response to an increase in pressure caused by the venting gas generated from the battery module.

Description

Technology Field

[0001] The present invention relates to a battery pack, and more specifically, to a battery pack capable of delaying heat propagation to adjacent cells or modules by rapidly discharging venting gas generated during internal ignition of a battery module through a venting channel. Background Technology

[0002] Semi-permanent batteries that convert electrical energy into the form of chemical energy and can be repeatedly charged and discharged are referred to as secondary batteries to distinguish them from primary batteries, which cannot be reused after a single use.

[0003] Rechargeable batteries include lithium-ion batteries, nickel-cadmium (Ni-Cd) batteries, lead-acid batteries, nickel-hydrogen (Ni-MH) batteries, air-zinc batteries, and alkaline manganese batteries. Among these, lead-acid batteries and lithium-ion batteries are considered the most actively commercialized rechargeable batteries.

[0004] In particular, lithium-ion batteries are actively being utilized as electric vehicle batteries recently due to their high energy storage density, the ability to be lightweight and miniaturized, excellent safety, low discharge rate, and long lifespan. For reference, lithium-ion batteries are generally classified into cylindrical, prismatic, and pouch types depending on their manufacturing form, and their applications extend beyond electric vehicle batteries to include ESS batteries and other electrical devices.

[0005] Currently, the operating voltage of a single lithium secondary battery cell is approximately 2.5V to 4.5V. Therefore, in order to apply secondary batteries as an energy source for electric vehicles, a battery module is configured by connecting multiple lithium-ion battery cells in series and / or parallel, and a battery pack is configured by connecting the battery modules in series and / or parallel.

[0006] Meanwhile, since secondary batteries involve chemical reactions during charging and discharging, their performance may degrade if used in environments higher than the optimal temperature. Furthermore, if thermal control is not maintained at the appropriate temperature, there is a constant risk of unexpected ignition or explosion. Additionally, battery modules are structured to intensively house these secondary batteries within a module housing; therefore, if even a single secondary battery undergoes heat runaway and becomes a trigger cell, the heat can spread to the other lithium secondary batteries, triggering a chain reaction that generates large amounts of venting gas, flames, and high-temperature particles containing electrode active materials and aluminum particles. These venting gases, flames, and high-temperature sparks propagate heat to adjacent battery modules, accumulating thermal energy within the battery pack and increasing internal pressure, ultimately leading to thermal runaway and explosion of the battery pack.

[0007] Accordingly, structural improvements are required to effectively disperse and efficiently discharge pressure and thermal energy within the battery pack before venting gas and flames generated from the initially ignited battery module are ejected and transferred to neighboring battery modules and the entire battery pack, thereby delaying heat propagation to adjacent cells and modules and preventing thermal runaway of the battery pack. The problem to be solved

[0008] The present invention was devised in consideration of the above-mentioned problems, and aims to reduce risk factors caused by venting gas by enabling the rapid and effective dispersion and discharge of venting gas and flames generated from the initially ignited battery module to the outside before they are ejected and transferred to neighboring battery cells and battery modules.

[0009] In addition, the present invention has the objective of delaying heat propagation to adjacent cells and adjacent modules due to venting gas and sparks generated from the first ignited battery module, and preventing thermal runaway of the battery pack.

[0010] The technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by those skilled in the art from the description of the invention below. means of solving the problem

[0011] A battery pack according to the present invention may include: a battery module; a pack tray having an open top and accommodating the battery module inside; a pack cover disposed on the upper part of the pack tray so as to seal the accommodating space in which the battery module is accommodated; and a variable venting channel section that partitions the accommodating space and provides a venting channel that deforms to discharge the venting gas when the accommodating space expands in response to an increase in pressure caused by the venting gas generated from the battery module.

[0012] The variable venting channel portion may include: a partition portion provided to protrude from the pack tray and partition the receiving space; a barrier portion provided to protrude from the pack cover in the direction of the pack tray and inserted and coupled to the partition portion when coupled to the pack tray; and a plurality of venting holes provided in the partition portion that open when a thermal event occurs and the pack cover expands upward.

[0013] The above venting channel can be formed in the bulkhead section by partially withdrawing the above partition section from the above partition section when an event occurs.

[0014] The above venting hole may be formed in the lower section of the bulkhead.

[0015] The above bulkhead section may include a first bulkhead provided in the center; and a pair of second bulkheads spaced apart by the width of the venting channel with the first bulkhead in between.

[0016] The above venting hole can be formed in the second bulkhead.

[0017] The above-mentioned barrier section may be a pair of barrier walls that slide between the first bulkhead and the second bulkhead to be inserted and released.

[0018] A gas outlet for discharging the venting gas is provided on the outer side of the above-mentioned pack tray, and the gas outlet may be provided as a mesh net.

[0019] The battery module includes a module case that accommodates a plurality of battery cells, and the module case may have a gas vent formed on a side that covers the side of the plurality of battery cells.

[0020] The above gas venting port can be provided with a mesh structure.

[0021] The above gas venting port and the above venting hole may be provided at a height facing each other.

[0022] According to another aspect of the present invention, a vehicle comprising the battery pack may be provided. Effects of the invention

[0023] According to one aspect of the present invention, venting gas and flames generated from the first ignited battery module can be rapidly and effectively dispersed and discharged outside the battery pack before being ejected and transferred to an adjacent battery module, thereby reducing risk factors caused by venting gas and the like.

[0024] According to another aspect of the present invention, thermal runaway of a battery pack can be prevented by minimizing thermal damage to adjacent battery cells and modules even in the event of a sudden change in the situation of a thermal event in any one battery cell or battery module.

[0025] The effects of the present invention are not limited to the effects described above, and unmentioned effects will be clearly understood by those skilled in the art from this specification and the attached drawings. Brief explanation of the drawing

[0026] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is a schematic perspective view of a battery pack according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of the main components of the battery pack of FIG. 1. Figure 3 is a perspective view of the pack cover of Figure 2 viewed from below. Figure 4 is a top view of the pack case of Figure 2. FIG. 5 is a longitudinal cross-sectional view of a battery pack according to one embodiment of the present invention. FIG. 6 is a cross-sectional perspective view in the width direction of a battery pack according to one embodiment of the present invention. FIGS. 7 and 8 are schematic diagrams illustrating examples of modifications to the variable venting channel portion during the diffusion of venting gas and thermal energy in a battery pack according to one embodiment of the present invention. FIG. 9 is a schematic diagram illustrating the state in which venting gas is discharged along a venting path in a battery pack according to one embodiment of the present invention. Figure 10 is a partial enlarged view of Figure 9. FIG. 11 is a perspective view of a battery module having a gas venting port formed in a battery pack according to another embodiment of the present invention. FIG. 12 is a schematic diagram illustrating the state in which venting gas is discharged in a cross-sectional view in the width direction of a battery pack equipped with the battery module of FIG. 11. Specific details for implementing the invention

[0027] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0028] Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely some of the most preferred embodiments of the invention and do not represent all of the technical ideas of the invention, and that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0030] FIG. 1 is a schematic perspective view of a battery pack according to one embodiment of the present invention, and FIG. 2 is an exploded perspective view of the main components of the battery pack of FIG. 1.

[0031] As illustrated in FIGS. 1 and 2, a battery pack (1) according to one embodiment of the present invention includes a pack tray (100) forming a receiving space, a pack cover (200), and a battery module (10) including one or more battery cells.

[0032] A battery cell refers to a secondary battery comprising an electrode assembly, an electrolyte, and a battery case, and while this embodiment targets a pouch-type secondary battery with high energy density and easy stacking, it goes without saying that cylindrical or prismatic secondary batteries can also be applied as battery cells.

[0033] The battery module (10) includes a cell assembly formed by stacking battery cells and a module case (12) for accommodating the cell assembly.

[0034] The above module case (12) is configured to accommodate one or more battery cells and may be made of a metal material or a plastic material such as ABS resin that has high rigidity and durability to physically or chemically protect the accommodated battery cells.

[0035] These module cases (12) may be provided with an additional outlet for venting gas generated from the battery cells to the outside, which will be described later in other embodiments.

[0036] The pack tray (100) is provided with a receiving space that accommodates at least one battery module (10) inside. The top of the pack tray (100) is provided in an open shape and is coupled to the pack cover (200). The pack tray (100) may be made of a material with excellent mechanical strength to protect the battery modules (10) from external impacts. Meanwhile, although not shown in the drawing, when the pack tray (100) and the pack cover (200) are coupled to each other, a coupling method such as bolting, welding, bonding, or hooking may be applied.

[0037] A plurality of partitioning walls are provided to partition the interior of the pack tray (100), and these form the partition section (310) of the variable venting channel section (300) described later. The partition section (310) is coupled to be inserted into a plurality of partition sections (320) of the pack cover (200) to partition the receiving space inside the pack tray (100). In this embodiment, four receiving spaces partitioned by the partition section (310) and the partition section (320) are provided, and four battery modules (10) are received in each receiving space, but the scope of the present invention is not limited to the number of partitioned receiving spaces or the number of battery modules (10) received in this embodiment.

[0038] A plurality of gas outlets (110) through which the venting gas is discharged are provided on the outer side of the pack tray (100), and in this embodiment, two are provided on each side of the pack tray (100). The gas outlets (110) are provided to communicate with the venting passage (311) described later and are located at the end of the venting passage (311). These gas outlets (110) are provided to be covered by a mesh net (111). Of course, the number and location of these gas outlets (110) may be configured differently from the drawing depending on the embodiment, and they may be provided in a location where the venting gas is discharged quickly and easily.

[0039] The pack cover (200) is placed on the upper part of the pack tray (100) so as to seal the receiving space in which the battery module (10) is received. The pack cover (200) is provided with a plurality of partition walls coupled to the pack cover (200), and the partition walls here constitute the partition wall (320) of the variable venting channel section (300) described later. In this embodiment, the pack cover (200) is provided to completely cover four battery modules (10), and the pack cover (200) is made of aluminum or SUS material.

[0040] As will be described in detail later, the pack tray (100) and the pack cover (200) are provided with a variable venting channel section (300) including a venting channel (311) that is variably provided to correspond to the pressure increase of the venting gas generated from the battery cell or battery module (10). Here, the venting channel (311) is formed when the receiving space expands and deforms due to the upward expansion (deformation) of the pack cover (200) relative to the pack tray (100) upon the occurrence of an event, and accordingly, a part of each wall of the pack tray (100) is opened, which will be described in detail later.

[0042] FIG. 3 is a perspective view of the pack cover of FIG. 2 viewed from below, FIG. 4 is a top view of the pack case of FIG. 2, FIG. 5 is a longitudinal cross-sectional view of a battery pack according to one embodiment of the present invention, and FIG. 6 is a cross-sectional perspective view of a battery pack according to one embodiment of the present invention in the width direction.

[0043] In conventional battery packs, partition walls that divide the accommodation space function as a configuration for separating and positioning battery modules from one another, and additional wall configurations have been proposed in an attempt to increase structural rigidity. In particular, the phenomenon of venting gas accumulation can be accelerated due to reinforced wall structures designed to prevent structural deformation.

[0044] Accordingly, in this embodiment, a structure is disclosed in which an additional discharge line is provided to discharge the venting gas while changing variably when the structure of the battery pack (1) is deformed due to the venting gas. That is, it includes a variable venting channel section (300) that provides a venting path (311) that deforms to discharge the venting gas when the receiving space expands in response to the pressure increase caused by the venting gas generated in the battery module (10).

[0045] To this end, the variable venting channel section (300), mainly referring to FIGS. 3 to 5, includes: a partition section (310) that is provided to protrude from the pack tray (100) and partitions the receiving space; a partition section (320) that is provided to protrude from the pack cover (200) toward the pack tray (100) and is inserted and coupled to the partition section (310) when coupled to the pack tray (100); and a plurality of venting holes (330) provided in the partition section (310) that open when a thermal event occurs and the pack cover (200) expands upward.

[0046] As illustrated in FIGS. 3 and 4, the partition (310) and the car wall (320) are arranged in the longitudinal direction (Y-axis direction) of the battery pack (1) and also in the width direction (X-axis direction) of the battery pack (1), and are arranged to intersect each other in the center. Both of these partition (310) and car wall (320) are provided from one end to the other end of the pack tray (100) and pack cover (200), and when the partition (310) and car wall (320) are combined, they partition a receiving space inside the battery pack (1).

[0047] Referring primarily to FIG. 4, the partition section (310) is provided to protrude from the plate surface of the pack tray (100) by the height of the battery module (10) to partition the receiving space and separate the received battery modules (10) from one another. The partition section (310) is provided to form a plurality of layers and may include a first partition (312) provided in the center, and a pair of second partitions (313) arranged spaced apart by the width of the venting channel (311) with the first partition (312) in between.

[0048] The first partition (312) is provided in the center (middle) of a plurality of walls provided in the pack tray (100), as shown in FIGS. 2 and 4. The first partition (312) partitions and separates each receiving space in which a battery module (10) is received.

[0049] The second partition (313) is positioned apart from the first partition (312) by a predetermined distance (the width of the venting channel (311)). A pair of the second partitions (313) are provided on both sides with the first partition (312) in between. Venting holes (330) are formed in the second partition (313), and a plurality of them are provided in the lower section of the partition section (310). The venting holes (330) can be opened when a thermal event occurs and the pack cover (200) expands upward.

[0050] As shown in FIGS. 2 and 3, the above-mentioned barrier section (320) is provided to protrude from the pack cover (200) toward the pack tray (100) and is a part that is inserted and coupled to the bulkhead section (310) when coupled to the pack tray (100). The above-mentioned barrier section (320) may be a pair of barrier walls (321) that slide between the first bulkhead (312) and the second bulkhead (313) to be inserted and uninserted.

[0051] The above venting channel (311) can be formed in the bulkhead (310) when the barrier (320) is partially withdrawn from the bulkhead (310) upon the occurrence of an event. Strictly speaking, it refers to the space between the first bulkhead (312) and the second bulkhead (313) within the bulkhead (310) that is created when the barrier (321) is withdrawn from the bulkhead (310) when the pack cover (200) expands upward due to a thermal event. This venting channel (311) can be formed when the venting gas is above a certain internal pressure.

[0052] The above venting holes (330) are provided in multiple locations in the lower section of the bulkhead section (310), and are opened when a thermal event occurs and the pack cover (200) expands upward. That is, normally, the venting holes (330) are closed because the barrier wall (321) is slid and inserted between the first bulkhead (312) and the second bulkhead (313). When a thermal event occurs and the battery cell or battery module (10) ignites and the internal pressure of the battery pack (1) rises due to the venting gas, the pack cover (200) expands upward from the pack tray (100), and at this time, the barrier wall (321) is pulled upward by the amount that the bulkhead section (320) has expanded upward, and the venting holes (330) can be opened. When the venting hole (330) is opened, it can be arranged to be connected to the venting channel (311) to the extent that it is opened.

[0053] The above variable venting channel section (300) normally functions as a partitioning structure that partitions the receiving space, but in the event of a thermal event, when the pressure increases due to the venting gas generated from the battery module (10), it can expand the receiving space and form an additional path to discharge the venting gas.

[0054] According to this embodiment, when the pack cover (200) (vehicle wall section (320)) expands upward relative to the pack tray (100) (bulk section (310)), a path is provided through which additional venting gas is smoothly and quickly discharged through the venting passage (311) formed within the bulk section (310), thereby reducing risk factors caused by venting gas discharge.

[0055] In addition, according to this embodiment, the thermal damage to adjacent battery cells and modules from the venting gas can be minimized, so thermal runaway of the entire battery pack (1) can be prevented in advance.

[0056] In addition, according to this embodiment, the venting gas that may accumulate compared to conventional methods can be easily discharged due to the reinforced wall structure designed to prevent structural deformation, thereby mitigating the heat accumulation phenomenon caused by high-temperature gas.

[0058] FIGS. 7 and 8 are schematic diagrams illustrating the operating state of a variable venting channel section during the diffusion of venting gas and thermal energy in a battery pack according to an embodiment of the present invention, FIG. 9 is a schematic diagram illustrating the state in which venting gas is discharged along a venting path in a battery pack according to an embodiment of the present invention, and FIG. 10 is a partial enlarged view of FIG. 9.

[0059] Hereinafter, the discharge process in which venting gas is easily discharged to the outside according to the present embodiment will be explained in detail with reference to FIGS. 1 to 9.

[0060] First, as shown in Fig. 9, when a thermal event occurs by ignition in the battery module (10) at the bottom left, thermal energy containing venting gas is ejected.

[0061] Then, the internal pressure within the receiving space increases and local heat accumulation may occur. When the internal pressure in the receiving space increases beyond the allowable pressure, the variable venting channel section (300) is activated.

[0062] Next, as shown in FIG. 7, the pack cover (200) for the pack tray (100) is extended, and the barrier (320) for the partition (310) is partially withdrawn to create a venting passage (311) within the partition (310). That is, the barrier (321) inserted between the first partition (312) and the second partition (313) is pushed upward, and an internal space is formed between the first partition (312) and the second partition (313) spaced apart by a predetermined distance. This internal space becomes the venting passage (311) and can serve as an additional discharge path for venting gas.

[0063] Next, as the pack cover (200) for the pack tray (100) expands, the venting hole (330) also opens. Normally, the venting hole (330) is closed because the barrier wall (321) is slid and inserted between the first partition (312) and the second partition (313). When a thermal event occurs and the battery cell or battery module (10) ignites and the internal pressure of the battery pack (1) rises due to the venting gas, the pack cover (200) expands upward from the pack tray (100). At this time, the barrier wall (321) is pulled upward by the amount that the barrier wall (320) has expanded upward, and the venting hole (330) can be opened. When the venting hole (330) is opened, it can be arranged to communicate with the venting passage (311) to the extent that it is opened.

[0064] FIG. 8 illustrates an exaggerated state in which the pack cover (200) is tilted and expanded upward when there is a localized increase in pressure due to venting gas inside the battery pack (1). Referring to the drawing, the degree of opening or the amount of opening of the venting hole (330) may vary depending on the extent to which the barrier wall (321) is drawn out from the first partition (312) and the second partition (313). Accordingly, the degree of opening of the venting hole (330) to the venting passage (311) may be variably changed in response to the battery cell or battery module (10) and adjacent areas (such as pressure imbalance inside the pack) where the pressure inside the battery pack (1) is relatively high, and the amount of venting gas discharged may increase proportionally as the amount of opening of the venting hole (330) increases.

[0065] The venting gas discharged through the venting channel (311) can be moved to the outer edge of the battery pack (1) as in FIG. 10 and discharged to the outside through the gas outlet (110) provided on the outer surface of the pack tray (100). The discharge of particles or particulate matter can be prevented by the gas outlet (110).

[0066] According to this operational configuration, the venting gas and flames generated from the first ignited battery module (10) can be quickly and effectively dispersed and discharged before being transferred to neighboring battery modules (10) and battery packs (1), thereby reducing risk factors caused by venting gas discharge.

[0067] In addition, thermal runaway of the battery pack (1) can be prevented by minimizing thermal damage to adjacent battery cells and modules even in the event of a sudden change in the situation of a thermal event in any one battery cell or battery module (10).

[0068] In addition, due to the reinforced wall structure designed to prevent structural deformation, venting gas that may accumulate within the accommodation space compared to conventional methods can be easily discharged, thereby mitigating the phenomenon of heat accumulation caused by high-temperature gas.

[0070] Next, other embodiments of the battery pack (1) of the present invention will be briefly described with reference to FIGS. 11 and 12.

[0071] FIG. 11 is a perspective view of a battery module having a gas venting port formed in a battery pack according to another embodiment of the present invention, and FIG. 12 is a schematic diagram illustrating the state in which venting gas is discharged in a longitudinal cross-sectional view in the width direction of a battery pack equipped with the battery module of FIG. 11.

[0072] Reference numbers identical to those in previous drawings indicate identical components. Duplicate descriptions of identical components will be omitted, and the explanation will focus on the differences from the previously described embodiments.

[0073] In a battery module (10) according to another embodiment of the present invention, compared to the above-described embodiment, as in FIG. 11, a gas venting port (13) for discharging venting gas generated from a battery cell to the outside may be provided in the module case (12), and the gas venting port (13) may be provided in a mesh structure.

[0074] These gas venting ports (13) are arranged along the longitudinal direction (Y-axis direction) of the battery module (10), so that the size of the gas venting ports (13) can also be large. Accordingly, rapid and rapid discharge to the outer surface of the module case (12) (i.e., both sides in the X-axis direction) is possible.

[0075] As shown in FIG. 12, the gas venting port (13) can be provided at a height facing the venting hole. Accordingly, the venting gas can be quickly and effectively dispersed and discharged even within the battery module (10) unit, and then discharged to the outside through the gas outlet (110) after passing through the venting hole (330) and the venting path (311).

[0076] Through this configuration, the venting gas and flames generated from the first ignited battery module (10) can be quickly and effectively dispersed and discharged before being transferred to neighboring battery modules (10) and battery packs (1), thereby reducing risk factors caused by venting gas discharge.

[0077] In addition, thermal runaway of the battery pack (1) can be prevented by minimizing thermal damage to adjacent battery cells and modules even in the event of a sudden change in the situation of a thermal event in any one battery cell or battery module (10).

[0078] In addition, due to the reinforced wall structure designed to prevent structural deformation, venting gas that may accumulate within the accommodation space compared to conventional methods can be easily discharged, thereby mitigating the phenomenon of heat accumulation caused by high-temperature gas.

[0079] Meanwhile, the battery pack (1) according to the present invention may further include various devices for controlling the charging and discharging of battery modules (10), such as a Battery Management System (BMS), a current sensor, a fuse, etc., although not illustrated.

[0080] The battery pack (1) according to the present invention can be applied to a vehicle such as an electric vehicle or a hybrid vehicle. That is, the vehicle according to the present invention may include the battery pack (1) according to the present invention. The battery pack (1) may be installed in the vehicle body frame under the vehicle seat or in the trunk space, and when installed in the vehicle, the arrangement order of the battery pack (1) may be reversed as needed.

[0081] In this specification, terms indicating directions such as up, down, left, right, front, and back have been used; however, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0082] As described above, although the present invention has been explained by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs.

[0083] Although the drawings and other accompanying materials for the description of the present invention and the illustration of embodiments thereof may be depicted in a somewhat exaggerated form to emphasize or highlight the technical content according to the present invention, it should be interpreted as obvious to a person skilled in the art that various modified application examples are possible by considering the aforementioned descriptions and the details illustrated in the drawings. Explanation of the symbols

[0084] 1 : Battery pack 10: Battery module 12: Module case 13: Gas vent 100: Pack Tray 110: Gas Outlet 111 : Mesh net 200 : Pack cover 300: Variable venting channel section 310: Bulkhead section 311: Venting Euro 312: 1st Bulkhead 313: Second bulkhead 320: Barrier section 321 : Extension wall 330 : Venting hole

Claims

Claim 1 A battery pack comprising: a battery module; a pack tray having an open top and accommodating the battery module internally; a pack cover disposed on the upper portion of the pack tray to seal the accommodating space in which the battery module is accommodated; and a variable venting channel portion that partitions the accommodating space and provides a venting channel that deforms to discharge the venting gas when the accommodating space expands in response to an increase in pressure caused by the venting gas generated from the battery module, wherein the variable venting channel portion comprises: a partition portion protruding from the pack tray to partition the accommodating space; a barrier portion protruding from the pack cover toward the pack tray and inserted and coupled to the partition portion when coupled to the pack tray; and a plurality of venting holes provided in the partition portion that open when the pack cover expands upward due to a thermal event. Claim 2 delete Claim 3 A battery pack according to claim 1, wherein the venting path is formed in the partition wall by partially withdrawing the partition wall from the partition wall when an event occurs. Claim 4 A battery pack according to claim 1, characterized in that the venting hole is formed in the lower section of the bulkhead. Claim 5 A battery pack according to claim 1, wherein the partition section comprises: a first partition provided in the center; and a pair of second partitions spaced apart by the width of the venting channel with the first partition in between. Claim 6 A battery pack according to claim 5, characterized in that the venting hole is formed in the second bulkhead. Claim 7 A battery pack according to claim 5, wherein the above-mentioned barrier is a pair of barriers that slide between the first barrier and the second barrier to be inserted and released. Claim 8 A battery pack according to claim 1, characterized in that a gas outlet for discharging the venting gas is provided on the outer side of the pack tray, and the gas outlet is provided as a mesh net. Claim 9 A battery pack according to claim 8, wherein the battery module comprises a module case accommodating a plurality of battery cells, and the module case has a gas vent formed on a side covering the sides of the plurality of battery cells. Claim 10 A battery pack according to claim 9, characterized in that the gas venting port is provided in a mesh structure. Claim 11 A battery pack according to claim 9, characterized in that the gas venting port and the venting hole are provided at a height facing each other. Claim 12 An automobile characterized by including a battery pack according to any one of claims 1 and 3 through 11.

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