Battery pack and vehicle including same

Abstract

The present invention relates to a battery pack including: a plurality of battery cells; and a pack case configured to accommodate the plurality of battery cells and having, in an inner space thereof, a venting flow path configured to allow a venting gas discharged from the battery cells to flow therethrough, and a cooling flow path provided on at least one side of the venting flow path and configured to allow a cooling medium to flow therethrough.

Description

Battery pack and vehicle including same

[0001] The present invention relates to a battery pack, and more particularly, to a battery pack with enhanced safety and a vehicle including the same.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0000307, ​​filed on January 2, 2024, and all contents disclosed in the specification and drawings of the said application are incorporated by reference into this application.

[0003] Secondary batteries, which boast high electrical properties such as high energy density and easy applicability across a wide range of product categories, are widely used not only in portable devices but also in electric vehicles (EVs) and hybrid electric vehicles (HEVs) powered by electrical power sources. These batteries are attracting attention as a new energy source for environmental friendliness and energy efficiency, not only because they can dramatically reduce fossil fuel use, but also because they produce no byproducts from energy use.

[0004] Commonly used secondary battery types today include lithium-ion batteries, lithium polymer batteries, nickel-cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries. When high output voltage is required, multiple battery cells are connected in series to form a battery module or battery pack. Furthermore, to increase charge / discharge capacity, multiple battery cells are connected in parallel to form a battery module or battery pack.

[0005] When connecting multiple battery cells in series or parallel to form a battery pack, it's common to first construct a battery module containing at least one battery cell, and then use this at least one battery module to add other components to form a battery pack or battery rack. Recently, battery packs in the cell-to-pack form, where multiple battery cells are housed directly in a pack housing or other device, without modularization, have also been manufactured.

[0006] However, when multiple battery modules are included within a battery pack, they can be vulnerable to thermal chain reactions between the modules. For example, if an event such as thermal runaway occurs within a single battery module, this thermal runaway can propagate to other battery modules. If the propagation of thermal runaway between battery modules is not adequately controlled, an event occurring in a specific battery module can trigger a chain reaction across multiple battery modules, potentially resulting in major problems such as explosions or fires.

[0007] In particular, if an event such as thermal runaway occurs in a single battery module, venting gases, etc., may be released outside the battery module. If the heat from the venting gases is not properly cooled, the heat may be transferred to other battery modules, potentially triggering a thermal chain reaction in those modules.

[0008] Accordingly, conventional battery packs have incorporated flame-retardant materials into their cooling systems, either on the bottom surface or between battery modules, to minimize the accumulation of heat energy in adjacent battery modules. However, while these conventional battery packs can cool the bottom surfaces of battery modules, they are insufficient to cool venting gases emitted in the event of a thermal runaway event within the battery module.

[0009] Therefore, when an event such as thermal runaway occurs in a battery pack, there is a need to develop a structure to improve the cooling performance of the battery pack by more efficiently cooling the heat, such as the venting gas, emitted.

[0010] Accordingly, the problem to be solved by the present invention is to provide a battery pack having improved cooling performance and an automobile including the same, by improving the structure so as to appropriately manage heat or venting gas discharged from a battery module.

[0011] However, the 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.

[0012] To solve the above problem, the present invention provides a battery pack including a pack case having a plurality of battery cells; and a venting channel configured to accommodate the plurality of battery cells and configured to allow venting gas discharged from the battery cells to flow in an internal space; and a cooling channel formed on at least one side of the venting channel and configured to allow a cooling medium to flow.

[0013] The above cooling path can be arranged parallel to the above venting path.

[0014] The above cooling path may be provided outside the above venting path.

[0015] The pack case is configured to compartmentalize the plurality of battery cells and may include a cross beam in which the venting path and the cooling path are formed in the internal space.

[0016] The above cross beam may be provided with a first gas inlet configured to allow the venting gas to flow into the venting path.

[0017] The module case may further include a module configured to accommodate the plurality of battery cells by grouping them, and having a venting hole formed on at least one side thereof so that the venting gas is discharged to the outside.

[0018] The above venting hole may be formed on the side of the module case and configured to communicate with the venting path.

[0019] The first gas inlet may further include a cover member configured to be opened by heat or pressure.

[0020] The pack case may include a base frame configured to accommodate the cross beam and the plurality of battery cells, and a first cooling communication hole configured to connect the base frame and the cross beam to each other, and a cooling path formed in an internal space.

[0021] The above pack case may include a baffle provided between the venting passage and the cooling passage.

[0022] The above baffle may be configured such that at least a portion of it is opened by the venting gas within the venting passage.

[0023] The above bulkhead may have a protrusion configured to protrude at least partially toward the venting duct.

[0024] The pack case is configured to cover the upper portion of the plurality of battery cells and may include a cover frame in which the venting path and the cooling path are formed in the internal space.

[0025] The cover frame may have a second gas inlet configured to allow the venting gas to flow into the venting path.

[0026] It may include a second cooling communication hole configured to communicate the cross beam and the cover frame with each other.

[0027] And, the present invention provides an automobile characterized by including a battery pack according to the present invention.

[0028] According to one aspect of the present invention, efficient cooling performance and safe venting performance of a battery pack can be secured.

[0029] Moreover, according to another aspect of the present invention, it is possible to effectively suppress heat from spreading to other battery modules by cooling venting gas generated in the battery module.

[0030] In this way, thermal runaway propagation between battery modules can be prevented or suppressed, thereby ensuring the safety and reliability of the battery pack.

[0031] In addition, according to another aspect of the present invention, events resulting from thermal runaway of a device equipped with a battery pack, such as fire or explosion, can be prevented or delayed.

[0032] In addition, the present invention may have various other effects, which will be described in each embodiment configuration, or an explanation of effects that can be easily inferred by a person skilled in the art will be omitted.

[0033] 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.

[0034] FIG. 1 is a perspective view of a battery pack according to one embodiment of the present invention.

[0035] Figure 2 is an exploded perspective view of a battery pack according to one embodiment of the present invention.

[0036] FIG. 3 is a top view of a battery pack according to one embodiment of the present invention, and is a drawing for explaining a venting path and a cooling path.

[0037] Fig. 4 is a cross-sectional view of a battery pack according to one embodiment of the present invention. For example, Fig. 4 may be a drawing illustrating cross-section I-I' of Fig. 1.

[0038] FIG. 5 is a cross-sectional view of a battery pack according to another embodiment of the present invention.

[0039] FIG. 6 is an exploded perspective view of a portion of a battery pack according to one embodiment of the present invention, and is a drawing for explaining a first gas inlet formed in a cross beam.

[0040] FIG. 7 is a cross-sectional perspective view of a battery pack according to one embodiment of the present invention, viewed from above.

[0041] FIG. 8 is a cross-sectional view of a battery pack to which a cover member according to one embodiment of the present invention is applied.

[0042] FIG. 9 is an exploded perspective view of a portion of a battery pack according to one embodiment of the present invention, and is a drawing for explaining a first cooling communication hole formed in a base frame.

[0043] FIG. 10 is a cross-sectional view of a battery pack to which a bulkhead is applied according to one embodiment of the present invention.

[0044] FIG. 11 is a top view of a battery pack to which a bulkhead is applied according to one embodiment of the present invention.

[0045] Figure 12 is a front view of a bulkhead according to one embodiment of the present invention.

[0046] FIG. 13 is a top view of a battery pack to which a bulkhead is applied according to another embodiment of the present invention.

[0047] FIG. 14 is a top view of a battery pack to which a bulkhead is applied according to another embodiment of the present invention.

[0048] FIG. 15 is a front view of a bulkhead applied to a battery pack according to another embodiment of the present invention.

[0049] FIG. 16 is a cross-sectional view of a battery pack according to another embodiment of the present invention.

[0050] FIG. 17 is a bottom perspective view of a cover frame included in a battery pack according to another embodiment of the present invention, and is a drawing for explaining a second cooling communication hole formed in the cover frame.

[0051] FIG. 18 is an exploded perspective view of a cover frame included in a battery pack according to another embodiment of the present invention, as viewed from below.

[0052] FIG. 19 is a schematic perspective view of a vehicle including a battery pack according to one embodiment of the present invention.

[0053] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0054] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0055] Furthermore, the present invention includes various embodiments. For each embodiment, redundant descriptions of substantially identical or similar components will be omitted, and the differences will be described.

[0056] Meanwhile, in the present invention, terms indicating directions such as up, down, left, right, front, and back may be used, but it is obvious to those skilled in the art that these terms are only for convenience of explanation and may vary depending on the location of the target object or the location of the observer.

[0057] For example, in an embodiment of the present invention, the X-axis direction shown in the drawing may mean a left-right direction, the Y-axis direction may mean a front-back direction perpendicular to the X-axis direction on a horizontal plane (XY plane), and the Z-axis direction may mean an up-down direction (vertical direction) perpendicular to both the X-axis direction and the Y-axis direction.

[0058]

[0059] FIG. 1 is a perspective view of a battery pack according to one embodiment of the present invention, FIG. 2 is an exploded perspective view of a battery pack according to one embodiment of the present invention, and FIG. 3 is a view of a battery pack according to one embodiment of the present invention viewed from above, and is a drawing for explaining a venting path and a cooling path.

[0060] Referring to FIGS. 1 to 3, a battery pack (1) according to one embodiment of the present invention may include a battery cell (100) and a pack case (200).

[0061] First, referring primarily to FIG. 2, a plurality of battery cells (100) may be included. Although not illustrated in the drawing, the plurality of battery cells (100) may include an electrode assembly, a cell case accommodating the electrode assembly, and electrode leads connected to the electrode assembly and extending outward from the cell case to function as electrode terminals. In this case, the plurality of battery cells (100) may be electrically connected to each other.

[0062] The battery cell (100) may be a pouch-type secondary battery. The cell case of such a pouch-type secondary battery may be configured in a pouch shape in which a metal layer made of aluminum is interposed between polymer layers.

[0063] A plurality of battery cells (100) can be arranged in a vertical direction (Z-axis direction) and in a front-back direction (X-axis direction) as shown in FIG. 2.

[0064] Meanwhile, the present invention is not limited by the specific type or shape of the battery cell (100), and various battery cells (100) known at the time of filing of the present invention may be employed to construct the battery pack (1) of the present invention. In this embodiment, a pouch-type secondary battery having a high energy density and easy stacking is targeted as shown in the drawing, but it goes without saying that a cylindrical or square secondary battery may be applied as the battery cell (100).

[0065] The pack case (200) may be configured to accommodate a plurality of battery cells (100). The pack case (200) may be provided in a box shape including a plurality of frames. The pack case (200) may be made of a material that can ensure mechanical rigidity, such as a metal such as steel or SUS, or a plastic, or may include such a material, in order to safely protect the battery cells (100) accommodated therein.

[0066] In addition, a venting path (VP) may be formed in the pack case (200). The venting path (VP) may refer to a passage through which venting gas or the like flows. The venting path (VP) may be formed in the internal space of the pack case (200). Here, the internal space of the pack case (200) may refer to a predetermined space separately provided inside the pack case (200), or may refer to a hollow space formed in a plurality of beams or frames forming the pack case (200), as illustrated in FIG. 3. Accordingly, the venting gas generated in the battery cell (100) may be configured to flow into the venting path (VP) formed in the internal space of the pack case (200).

[0067] And, a cooling passage (CP) may be formed in the pack case (200). The cooling passage (CP) may refer to a passage configured to allow a cooling medium such as coolant to flow. The cooling passage (CP) may be formed in the internal space of the pack case (200). Here, the internal space of the pack case (200) may refer to a predetermined space separately provided inside the pack case (200), or may refer to a hollow space formed in a plurality of beams or frames forming the pack case (200), as illustrated in FIG. 3.

[0068] Referring to FIG. 3, a venting path (VP) and a cooling path (CP) may be provided together in the internal space of the pack case (200). The cooling path (CP) may be provided on at least one side of the venting path (VP). In particular, the venting path (VP) and the cooling path (CP) may be configured to be in contact with each other. Accordingly, the venting gas, etc. within the venting path (VP) may be configured to contact the cooling path (CP).

[0069] According to the above-described embodiment of the present invention, when thermal runaway occurs in the battery cell (100), the heat of venting gas or flames, etc., inside the venting passage (VP) can be cooled by the cooling medium of the cooling passage (CP). That is, according to the above-described embodiment of the present invention, the heat of the venting gas, etc. that is discharged can be controlled more efficiently. As a result, the cooling performance of the battery pack (1) can be secured.

[0070] In addition, according to the above-described embodiment of the present invention, as indicated by the dotted arrow in FIG. 3, high-temperature gases or flames can be quickly discharged to the outside of the battery pack (1) through the venting path (VP), thereby minimizing heat transmission to other battery cells (100). Accordingly, thermal runaway transmission within the battery pack (1) can be prevented or suppressed, thereby ensuring the safety and reliability of the battery pack (1).

[0071]

[0072] Referring to FIG. 3, the cooling conduit (CP) may be provided parallel to the venting conduit (VP). The venting conduit (VP) may extend in one direction, and the cooling conduit (CP) may extend in one direction in which the venting conduit (VP) extends. That is, the cooling conduit (CP) may be arranged parallel to the venting conduit (VP). According to the above-described embodiment of the present invention, when thermal runaway of the battery cell (100) occurs, heat such as venting gas or flame inside the venting conduit (VP) can be more efficiently cooled by the cooling medium of the cooling conduit (CP).

[0073] In addition, the cooling path (CP) may be provided outside the venting path (VP). That is, it may mean that the cooling path (CP) is provided outside the venting path (VP) with respect to a certain battery cell (100). According to the above-described embodiment of the present invention, since the venting path (VP) is arranged between the battery cell (100) and the cooling path (CP), venting gas or flame generated in the battery cell (100) can quickly move to the venting path (VP) and, at the same time, be cooled by the cooling medium within the cooling path (CP).

[0074] Meanwhile, referring to FIG. 3, the pack case (200) may include a partition wall (W) provided between the venting path (VP) and the cooling path (CP). The partition wall (W) may be configured to separate the venting path (VP) and the cooling path (CP) from each other. Accordingly, the venting gas or the like may be configured to be cooled by contacting the surface of the partition wall forming the cooling path (CP).

[0075]

[0076] Meanwhile, referring to FIG. 2, a plurality of battery cells (100) may be modularized into one or more battery modules (10). That is, the battery pack (1) according to the present invention includes a plurality of battery modules (10), and the plurality of battery cells (100) included in the battery pack (1) may be divided and included in a plurality of battery modules (10). At this time, the plurality of battery cells (100) included in the battery module (10) may be electrically connected to each other.

[0077] In particular, the battery pack (1) according to the present invention may include a module case (11). The module case (11) may be configured to have an empty space formed therein and accommodate at least some of a plurality of battery cells (100) in the internal space. In particular, the module case (11) may be configured to accommodate the battery cells (100). That is, the module case (11) groups a plurality of battery cells (100) into a plurality of battery modules (10) and may serve as a boundary that physically limits the internal space of each battery module (10).

[0078] Additionally, although not shown in the drawing, the battery module (10) may include a busbar assembly and / or module terminals electrically connected to a plurality of battery cells (100) housed therein.

[0079] The battery module (10) may include a venting hole (12). The venting hole (12) may be configured to allow gas generated from a battery cell (100) housed inside the module case (11) to be discharged to the outside of the module case (11).

[0080] Specifically, a venting hole (12) may be provided in the module case (11) to enable directional venting in a specific direction. The venting hole (12) may be provided on at least one side of the module case (11). FIG. 2 illustrates an embodiment in which the venting hole (12) is provided on the upper surface of the module case (11). Meanwhile, the number or location of the venting holes (12) described based on the embodiment of FIG. 2 and the like are merely examples, and may of course be changed to various other numbers or locations.

[0081]

[0082] Meanwhile, referring to FIGS. 1 to 3, the pack case (200) may include a base frame (210) and a plurality of side frames (220).

[0083] The base frame (210) may be configured to accommodate a plurality of battery cells (100). The base frame (210) may form the lower surface of the pack case (200) and may be provided in a square plate shape. In addition, the base frame (210) may be provided with a flat upper surface so that the battery cells (100) or battery modules (10) may be stably accommodated.

[0084] This base frame (210) can have a cooling path (CP) formed in its internal space. That is, a hollow space can be formed inside the base frame (210) so that a cooling medium can flow through the hollow space.

[0085] According to the above-described embodiment of the present invention, since the bottom surface of the battery cell (100) or the battery module (10) can be cooled, heat energy accumulation in the battery cell (100) can be minimized. In particular, the cooling performance of the battery pack (1) can be secured by minimizing heat generation in the battery cell (100) due to the charge / discharge cycle in the normal state of the battery pack (1).

[0086] Meanwhile, a battery pack (1) according to one embodiment of the present invention may include an inlet port (I) configured to allow a cooling medium to be introduced from the outside into a cooling passage (CP) inside the battery pack (1), and an outlet port (O) configured to allow a cooling medium to be discharged from the cooling passage (CP) inside the battery pack (1) to the outside. The inlet port (I) and the outlet port (O) may be provided in a base frame (210).

[0087] A plurality of side frames (220) may be provided to extend upward from each corner of the base frame (210). The plurality of side frames (220) may be provided to surround a plurality of battery cells (100). More specifically, the plurality of side frames (220) may be provided as a right wall located at the +X direction side end of the base frame (210), a rear wall located at the +Y direction side end, a left wall located at the -X direction side end, and a front wall located at the -Y direction side end, respectively, to form a side surface of the pack case (200).

[0088] Meanwhile, referring to FIG. 2, the pack case (200) may include a venting device (230). The venting device (230) may be configured to discharge gas generated from the battery cell (100) to the outside of the pack case (200). The venting device (230) may be provided to communicate with a venting path (VP). Accordingly, the venting gas of the venting path (VP) may be configured to be discharged to the outside of the pack case (200) through the venting device (230).

[0089] The venting device (230) may be configured to open by the pressure of the venting gas when the venting gas is generated inside the pack case (200) and the internal pressure increases, thereby discharging the venting gas to the outside of the pack case (200).

[0090] For example, the venting device (230) may be configured to open and close depending on the internal pressure within the pack case (200). Alternatively, the venting device (230) may be configured in the form of a hole. Meanwhile, the present invention is not limited by the specific type or shape of the venting device (230), and various venting devices (230) known at the time of filing of the present invention may be employed to configure the battery pack (1) of the present invention.

[0091] Specifically, the venting device (230) may be provided on the side of the pack case (200), i.e., on the side frame (220). A plurality of venting devices (230) may be provided. The venting device (230) may be provided on at least one side frame (220) among a plurality of side frames (220). The venting device (230) may be separately formed on two or more side frames (220), or two or more may be formed on one side frame (220).

[0092] Meanwhile, the number or location of the venting device (230) described based on the embodiment of FIG. 2 is merely an example, and it is obvious that the number or location may be changed to various other numbers or locations.

[0093] Additionally, the pack case (200) may include a cross beam (240). The cross beam (240) may be configured to partition the internal space of the pack case (200). The cross beam (240) may be configured to partition a plurality of battery cells (100) or a plurality of battery modules (10). The cross beam (240) may be configured to extend along the left-right direction and / or the front-back direction of the pack case (200).

[0094] A plurality of cross beams (240) may be provided. For example, the cross beams (240) may include a main beam (240a) and a sub beam (240b). The main beam (240a) may be provided between the battery cell (100) or the battery module (10) and the side frame (220). For example, as illustrated in FIG. 2, the main beam (240a) may be provided to extend in the left and right directions and connect the right and left walls of the side frame (220). The main beam (240a) may be configured to be spaced apart from the side frame (220) by a predetermined distance. A control device of the battery pack (1), such as a BMS, may be provided in the space between the main beam (240a) and the side frame (220).

[0095] The sub-beam (240b) may be provided to connect at least some of the side frames (220). For example, as illustrated in FIG. 2, the sub-beam (240b) may be provided to connect the left wall and the right wall among the side frames (220). Accordingly, the sub-beam (240b) may be provided between each of the plurality of battery modules (10) arranged in four rows along the front-rear direction to partition the battery modules (10).

[0096]

[0097] Fig. 4 is a cross-sectional view of a battery pack according to one embodiment of the present invention. For example, Fig. 4 may be a cross-sectional view taken along line I-I' of Fig. 1. In addition, Fig. 5 is a cross-sectional view of a battery pack according to another embodiment of the present invention. In addition, Fig. 6 is an exploded perspective view of a portion of a battery pack according to one embodiment of the present invention, and is a drawing for explaining a first gas inlet formed in a cross beam.

[0098] Referring to FIGS. 4 and 5, the cross beam (240) may be configured to form a venting path (VP) in its internal space. That is, an empty space is formed inside the cross beam (240) through which a venting gas or the like can flow, and the space may be defined as a venting path (VP). According to the above-described exemplary configuration of the present invention, a venting gas or the like discharged from a battery cell (100) or battery module (10) in contact with the cross beam (240) can directly move to the venting path (VP) formed in the cross beam (240), so that the venting gas or the like can be discharged to the outside of the pack case (200) more quickly.

[0099] Specifically, referring to FIGS. 4 to 6, a first gas inlet (241) may be provided in the cross beam (240). The first gas inlet (241) may be configured to allow venting gas to flow into the venting path (VP). That is, the first gas inlet (241) may be provided to connect the venting path (VP) and the battery cell (100).

[0100] Referring to FIG. 6, the first gas inlet (241) may be provided on at least one side of the cross beam (240). The first gas inlet (241) may be provided on a side of the cross beam (240) that faces the battery cell (100) or the battery module (10). That is, the first gas inlet (241) may be provided on a side of the cross beam (240). A plurality of first gas inlets (241) may be provided. For example, the first gas inlets (241) may be provided on both sides of the sub beam (240b) that faces the battery module (10).

[0101] The first gas inlet (241) may be provided closer to the inner side of the cross beam (240) than the outer side of the pack case (200). That is, as in the embodiment illustrated in FIG. 6, the first gas inlet (241) may be provided at a position closer to the center of the pack case (200) than the side frame (220). Accordingly, the length of the venting passage (VP) through which the venting gas or the like can flow within the cross beam (240) may be formed longer. According to the above-described embodiment of the present invention, as the venting passage (VP) becomes longer, the time for the venting gas or the like to be cooled by the cooling medium within the cooling passage (CP) may increase. Accordingly, the cooling efficiency of the battery pack (1) may be further improved.

[0102] Specifically, as shown by the dotted arrows in FIGS. 4 and 5, venting gas generated in the battery cell (100) may be discharged through the venting hole (12) and introduced into the venting path (VP) inside the cross beam (240) through the first gas inlet (241).

[0103] Referring to FIG. 4, the first gas inlet (241) may be provided at a location where the path of the venting gas discharged from the venting hole (12) can be bent at least once and introduced. That is, the first gas inlet (241) may be formed at a location in the cross beam (240) after the flow of the venting gas or flame has been switched at least once. As an example, the portion where the first gas inlet (241) is located may be configured to be positioned perpendicular to one surface of the module case (11) in which the venting hole (12) is formed.

[0104] According to the above-described embodiment of the present invention, since the first gas inlet (241) is provided at a position after the venting gas or flame discharged from the venting hole (12) has been bent at least once, the venting gas or flame can be reliably blocked from flowing back into the venting hole (12). In addition, in the case of a flame with strong straight-line propagation, the straight-line propagation of the flame can be minimized by bending the path of the flame, thereby blocking the heat or pressure of the flame from being directly discharged to the first gas inlet (241).

[0105] Unlike the above embodiment, the first gas inlet (241) may be provided at a position facing the venting hole (12). That is, the venting hole (12) may be provided on one side of the module case (11) facing the venting path (VP). For example, as illustrated in FIG. 5, when the first gas inlet (241) and the venting path (VP) are provided in the cross beam (240), the venting hole (12) may be provided on the side of the module case (11) facing the cross beam (240). Accordingly, the venting gas or the like may be induced to move directly toward the venting path (VP).

[0106] According to the above-described embodiment of the present invention, the venting gas, etc. discharged from the venting hole (12) facing the venting path (VP) can move directly to the venting path (VP) formed in the pack case (200), so the venting gas, etc. can be discharged to the outside more quickly and smoothly.

[0107]

[0108] FIG. 7 is a cross-sectional perspective view of a battery pack according to one embodiment of the present invention, viewed from above.

[0109] Meanwhile, referring to FIGS. 3 and 7, the venting path (VP) may also be formed inside a plurality of side frames (220). Accordingly, as indicated by the dotted arrows in FIG. 3, the venting gas generated from the battery cell (100) may move to the venting path (VP) formed in the cross beam (240) through the venting hole (12) and then to the venting path (VP) formed in the side frame (220). This venting gas may be discharged to the outside of the pack case (200) through the venting device (230) provided in the side frame (220).

[0110] Specifically, referring to FIG. 7, the pack case (200) may be provided with a first gas exhaust port (242). The first gas exhaust port (242) may be configured to connect a venting path (VP) inside the cross beam (240) and a venting path (VP) inside the side frame (220) to each other. For example, the first gas exhaust port (242) may be provided between the cross beam (240) and the side frame (220). The first gas exhaust port (242) may be provided at each portion where a plurality of cross beams (240) are connected to the side frame (220).

[0111] Accordingly, the venting gas, etc., which has been introduced into the venting path (VP) inside the cross beam (240) through the first gas inlet (241), can pass through the first gas outlet (242) and be introduced into the venting path (VP) inside the side frame (220) and be discharged to the outside of the pack case (200) through the venting device (230).

[0112] According to the above-described embodiment of the present invention, since the venting gas and the like can move directly to the venting path (VP) of the side frame (220) in which the venting device (230) is provided, the venting gas and the like can be quickly discharged to the outside of the pack case (200).

[0113]

[0114] FIG. 8 is a cross-sectional view of a battery pack to which a cover member according to one embodiment of the present invention is applied.

[0115] A battery pack (1) according to one embodiment of the present invention may further include a cover member (300). Referring to FIG. 8, the cover member (300) may be configured to cover the first gas inlet (241). A plurality of cover members (300) may be provided, and may be provided for each first gas inlet (241). The cover member (300) may be provided on one surface of the cross beam (240) where the first gas inlet (241) is formed.

[0116] The cover member (300) may be configured to open by heat or pressure when a thermal event occurs. For example, the cover member (300) may be configured to melt by heat such as a venting gas. Alternatively, the cover member (300) may be configured to rupture by pressure such as a venting gas.

[0117] Referring to Fig. 8, among the plurality of cover members (300), only the cover member (300) provided on the side of the battery module (10) where the thermal event occurred may be configured to be opened. Referring to the dotted arrow shown in Fig. 8, the venting gas discharged through the venting hole (12) of the battery module (10) where the thermal event occurred may be introduced into the venting path (VP) formed inside the pack case (100) as the first gas inlet (241) is opened as the cover member (300) is opened. Accordingly, since the remaining cover members (300) provided on the side of the other adjacent battery modules (10) are not opened, the venting gas, etc. inside the venting path (VP) may be configured not to be discharged again to the side of the other battery modules (10).

[0118] According to the above-described embodiment of the present invention, when thermal runaway occurs in a battery cell (100), high-temperature gases or flames generated in each battery module (10) can be individually discharged to the outside, thereby minimizing heat propagation to battery cells (100) provided in other battery modules (10). That is, according to the above-described embodiment of the present invention, even if a thermal event occurs in a battery module (10), it can be prevented from affecting other battery modules (10). Accordingly, thermal runaway propagation within the battery pack (1) can be prevented or suppressed, thereby ensuring the safety and reliability of the battery pack (1).

[0119]

[0120] FIG. 9 is an exploded perspective view of a portion of a battery pack according to one embodiment of the present invention, and is a drawing for explaining a first cooling communication hole formed in a base frame.

[0121] Referring to FIG. 9 together with FIG. 4 and FIG. 5, the cross beam (240) may be configured to form a cooling passage (CP) in its internal space. That is, an empty space through which a cooling medium such as a cooling water can flow is formed inside the cross beam (240), and the space may be defined as a cooling passage (CP). The cooling passage (CP) may be provided in the cross beam (240) in a manner that is completely separated from the venting passage (VP), while being in contact with and parallel to the venting passage (VP). At this time, the above-described partition (W) may be provided inside the cross beam (240).

[0122] Specifically, referring to FIGS. 4 and 9, the pack case (200) may include a first cooling communication hole (243). The first cooling communication hole (243) may be configured to communicate the base frame (210) and the cross beam (240) with each other. That is, the first cooling communication hole (243) may be configured to communicate the cooling passage (CP) inside the base frame (210) with the cooling passage (CP) inside the cross beam (240). The first cooling communication hole (243) may be provided between the cross beam (240) and the base frame (210). For example, the first cooling communication hole (243) may be provided at a portion where the cross beam (240) is connected to the base frame (210). Accordingly, as shown by the solid arrow in Fig. 4, the cooling medium inside the base frame (210) can flow through the cooling path (CP) inside the cross beam (240).

[0123] The first cooling communication hole (243) may include a first cooling inlet (243a) and a first cooling outlet (243b). The first cooling inlet (243a) may be configured so that a cooling medium inside the base frame (210) flows into a cooling passage (CP) inside the cross beam (240). The first cooling outlet (243b) may be configured so that a cooling medium inside the cross beam (240) flows into a cooling passage (CP) inside the base frame (210).

[0124] Accordingly, as indicated by the dotted arrow in FIG. 9, the cooling medium inside the base frame (210) can be introduced into the cooling path (CP) inside the cross beam (240) through the first cooling inlet (243a), flow through the cooling path (CP), and then be discharged back into the cooling path (CP) inside the base frame (210) through the first cooling outlet (243b).

[0125] According to the above-described embodiment of the present invention, when the inlet port (I) is connected to the base frame (210), a cooling medium can be introduced into the cooling path (CP) inside the cross beam (240), so that heat of venting gas or the like passing through the venting path (VP) inside the cross beam (240) can be cooled. As a result, heat transfer to other adjacent battery modules (10) can be minimized.

[0126] Meanwhile, the cooling path (CP) inside the cross beam (240) may include a portion configured to become narrower as it moves from the first cooling inlet (243a) toward the cross beam (240). According to the above-described embodiment of the present invention, the cooling medium can move more smoothly from the cooling path (CP) inside the base frame (210) to the cooling path (CP) inside the cross beam (240).

[0127]

[0128] FIG. 10 is a cross-sectional view of a battery pack to which a bulkhead is applied according to one embodiment of the present invention, FIG. 11 is a view of a battery pack to which a bulkhead is applied according to one embodiment of the present invention as viewed from above, and FIG. 12 is a view of a bulkhead according to one embodiment of the present invention as viewed from the front.

[0129] Referring to FIGS. 10 to 12, the bulkhead (W) may be configured such that at least a portion thereof is opened by the venting gas within the venting passage (VP). Accordingly, the cooling medium within the cooling passage (CP) may be discharged toward the venting passage (VP) through a portion of the opened bulkhead (W). According to the above-described exemplary configuration of the present invention, when a thermal event occurs in a battery module (10), the cooling medium may be discharged from the cooling passage (CP) to the venting passage (VP), thereby cooling the heat of the venting gas and extinguishing a flame, etc. Furthermore, the pressure of the discharged cooling medium may suppress particles such as sparks from flowing within the venting passage (VP).

[0130] Specifically, the bulkhead (W) may be provided with a bulkhead hole (H) configured to open when a thermal event occurs. For example, a sealing member may be configured to normally cover the bulkhead hole (H), and when a thermal event occurs, the sealing member may be configured to melt and open the bulkhead hole (H). Alternatively, a notch may be provided along the bulkhead hole (H) so that the bulkhead hole (H) is opened by heat or pressure.

[0131] A plurality of bulkhead holes (H) may be provided and arranged along a number of columns and rows. The bulkhead holes (H) may be provided in a small size so that the cooling medium has directionality when discharged.

[0132] In particular, the direction in which the cooling medium is discharged from the partition hole (H) may be configured to face opposite to the direction in which the venting gas flows (see the dotted arrows illustrated in FIGS. 11 and 12). The venting gas may be configured to be discharged toward the outside of the pack case (200), and the cooling medium may be configured to be discharged toward the inside of the pack case (200). For example, as in the embodiment illustrated in FIGS. 11 and 12, the cooling medium may be configured to be discharged toward the first gas inlet (241) from the partition hole (H). To this end, the partition hole (H) may be formed to be inclined in the direction toward the first gas inlet (241). According to the above-described exemplary configuration of the present invention, the heat of the venting gas is cooled by the cooling medium, and the pressure of the discharged cooling medium can further suppress particles such as sparks from flowing inside the venting passage (VP).

[0133] In addition, as in the embodiment illustrated in Fig. 12, the bulkhead hole (H) may be provided at the upper portion of the bulkhead (W). Since venting gas or flame, etc., have a strong tendency to move upward as a gas, if the cooling medium is discharged from the upper portion of the bulkhead (W) as in the above-described embodiment of the present invention, the venting gas or flame, etc., inside the venting passage (VP) can be cooled more efficiently.

[0134]

[0135] FIG. 13 is a top view of a battery pack to which a bulkhead is applied according to another embodiment of the present invention, FIG. 14 is a top view of a battery pack to which a bulkhead is applied according to another embodiment of the present invention, and FIG. 15 is a front view of a bulkhead applied to a battery pack according to another embodiment of the present invention.

[0136] Referring to FIGS. 13 to 15, the bulkhead (W) may have a protrusion (P). The protrusion (P) may be configured such that the bulkhead (W) at least partially protrudes toward the venting passage (VP). The protrusion (P) may be configured such that it protrudes from the outer surface of the bulkhead (W) in the direction of the venting passage (VP). According to the above-described embodiment of the present invention, the flow of venting gas, etc. flowing through the venting passage (VP) may be obstructed or the contact area and / or contact time with the cooling passage (CP) may be increased. The shape and length of the protrusion (P) may be variously provided.

[0137] Referring to FIG. 13, as an example, the protrusion (P) may include a first protrusion (P1). The first protrusion (P1) may be configured to extend vertically.

[0138] In addition, the first protrusions (P1) may be provided in multiple numbers. The multiple first protrusions (P1) may be arranged to be spaced apart from each other along the horizontal direction. For example, the multiple first protrusions (P1) may be arranged to be spaced apart from each other along the longitudinal direction of the partition wall (W) (X-axis direction in FIG. 13).

[0139] Moreover, as in the embodiment illustrated in FIG. 13, the first protrusion (P1) may be provided so as to face the first gas inlet (241) in a diagonal shape from the outer surface of the partition wall (W). That is, the first protrusion (P1) may be provided so as to form an acute angle with the partition wall (W). For example, at least a portion of the first protrusion (P1) may be configured to protrude from the outer surface of the partition wall (W) toward the inside of the venting passage (VP), and to face the first gas inlet (241) as it goes toward the outer end. The length at which the first protrusion (P1) protrudes from the partition wall (W) may be provided in various ways.

[0140] According to the above-described embodiment of the present invention, the venting gas is reflected by the first protrusion (P1), thereby increasing the time that the venting gas or flame remains within the venting path (VP), thereby allowing the venting gas to be cooled for a longer period of time. As a result, the heat of the venting gas can be more efficiently cooled by the cooling medium.

[0141] In addition, according to the above-described embodiment of the present invention, the venting gas or flame, etc. inside the venting path (VP) is reflected by the first protrusion (P1), thereby further suppressing the flow of sparks or flames, etc., which have a strong straight-line nature. In this case, particles such as sparks can be captured by the grooves formed between the first protrusions (P1). Accordingly, sparks and flames, etc., can be prevented from being discharged to the outside of the pack case (200).

[0142] Referring to Fig. 14, as another embodiment, the protrusion (P) may include a second protrusion (P2). The second protrusion (P2) may be configured to extend horizontally. The second protrusion (P2) may be provided in a straight line along the horizontal direction. That is, the second protrusion (P2) may be provided parallel to the upper or lower surface of the partition wall (W). Alternatively, as another embodiment, the second protrusion (P2) may be provided in a diagonal shape on the outer surface of the partition wall (W).

[0143] Alternatively, as in the embodiment illustrated in FIG. 14, the second protrusion (P2) may have a folded portion (B). The folded portion (B) may be configured such that at least a portion of the second protrusion (P2) is folded upward or downward. For example, the second protrusion (P2) may be configured to form a 'Z' shape.

[0144] At this time, the second protrusions (P2) may be provided in multiple numbers. The multiple second protrusions (P2) may be arranged to be spaced apart from each other along the vertical direction. For example, the multiple second protrusions (P2) may be arranged to be spaced apart from each other along the height direction of the partition wall (W) (Z-axis direction in FIG. 14). Accordingly, the venting gas may flow along the space formed between the second protrusions (P2) that are spaced apart from each other.

[0145] According to the above-described embodiment of the present invention, since the second protrusion (P2) has a bend (B), the length of the path of the venting gas passing through the venting passage (VP) can be increased. Accordingly, the venting gas can remain within the venting passage (VP) for a relatively long time, thereby increasing the time it takes for the venting gas to be cooled by the cooling medium, thereby improving cooling efficiency.

[0146] In addition, according to the above-described embodiment of the present invention, even if the venting gas flows into the venting path (VP) of the cross beam (240) facing the other battery cell (100), the heat transfer to the other battery cells (100) can be minimized because the heat of the venting gas has already cooled.

[0147] Referring to Fig. 15, as another embodiment, the protrusion (P) may include a third protrusion (P3). The third protrusion (P3) may be configured such that at least a portion of the bulkhead (W) protrudes toward the venting passage (VP) to form a filling groove (S1) filled with a cooling medium therein. That is, the cooling passage (CP) may be configured such that at least a portion thereof protrudes toward the venting passage (VP).

[0148] The filling grooves (S1) may be configured to be provided in multiple numbers and spaced apart from each other in the vertical direction. For example, the third protrusion (P3) may be configured to have a repetitively formed uneven shape along the vertical direction. The third protrusion (P3) may be configured to extend horizontally.

[0149] Accordingly, the cooling medium can flow in the filling groove (S1) of the third protrusion (P3). In addition, a space (S2) through which a venting gas or the like can flow can be provided between the filling grooves (S1). According to the above-described embodiment of the present invention, since the third protrusion (P3) is provided, the area in which the venting gas or the like flowing inside the venting passage (VP) comes into contact with the cooling medium can increase. Accordingly, the venting gas or the like can be quickly cooled, thereby minimizing heat transfer to other battery cells (100).

[0150]

[0151] Fig. 16 is a cross-sectional view of a battery pack according to another embodiment of the present invention. For example, Fig. 16 may be a cross-sectional view taken along line I-I' of Fig. 1. In addition, Fig. 17 is a bottom perspective view of a cover frame included in a battery pack according to another embodiment of the present invention, and is a drawing for explaining a second cooling communication hole formed in the cover frame. In addition, Fig. 18 is an exploded perspective view of a cover frame included in a battery pack according to another embodiment of the present invention, and is a view viewed from below.

[0152] Meanwhile, referring mainly to FIG. 16, the pack case (200) of the battery pack (1) according to one embodiment of the present invention may further include a cover frame (250). The cover frame (250) may be configured to cover the upper portions of a plurality of battery cells (100). The cover frame (250) may be provided to form the upper surface of the pack case (200). The cover frame (250) may be coupled to the side frame (220). Alternatively, the cover frame (250) may be provided integrally with the side frame (220).

[0153] This cover frame (250) can be configured so that a venting path (VP) is formed in the internal space. That is, an empty space through which a venting gas or the like can flow is formed inside the cover frame (250), and the space can be defined as a venting path (VP).

[0154] In addition, the cover frame (250) may be configured so that a cooling passage (CP) is formed in the internal space. That is, an empty space is formed inside the cover frame (250) through which a cooling medium such as coolant can flow, and the space may be defined as a cooling passage (CP).

[0155] The cover frame (250) may be configured so that a venting path (VP) and a cooling path (CP) are formed together inside. That is, as another embodiment, a venting path (VP) and a cooling path (CP) may be formed in both the cross beam (240) and the cover frame (250).

[0156] At this time, the inlet port (I) and the outlet port (O) may be provided not only in the base frame (210) but also in the cover frame (250). This allows the cooling medium to flow from the outside of the battery pack (1) to the cooling passage (CP) inside the base frame (210) and the cover frame (250).

[0157] More specifically, referring to FIGS. 16 and 17, the cover frame (250) may include an upper cover (250a), a lower cover (250b), and a partition wall (W). The upper cover (250a) may be configured to form an upper surface of the battery pack (1) as a surface forming the outermost surface of the cover frame (250). The lower cover (250b) may be provided lower than the upper cover (250a) and configured to be spaced apart from the upper cover (250a) by a predetermined distance. A venting passage (VP) and a cooling passage (CP) may be formed between the upper cover (250a) and the lower cover (250b).

[0158] Specifically, a partition wall (W) may be provided between the upper cover (250a) and the lower cover (250b). The partition wall (W) may be configured to separate a venting path (VP) and a cooling path (CP) from each other. In particular, the cooling path (CP) may be provided above the venting path (VP) inside the cover frame (250). That is, a cooling path (CP) may be formed between the upper cover (250a) and the partition wall (W), and a venting path (VP) may be formed between the lower cover (250b) and the partition wall (W). Accordingly, the lower cover (250b), the partition wall (W), and the upper cover (250a) may be arranged in that order in a direction from the inside to the outside of the battery pack (1).

[0159] Referring to FIGS. 16 and 17, a second gas inlet (251) may be provided in the cover frame (250). The second gas inlet (251) may be formed in the lower cover (250b). The second gas inlet (251) may be configured to allow venting gas to flow into the venting path (VP). That is, the second gas inlet (251) may be provided to communicate the venting path (VP) with the battery cell (100). A plurality of second gas inlets (251) may be provided.

[0160] Accordingly, as indicated by the dotted arrow in Fig. 16, the venting gas generated in the battery cell (100) can be discharged through the venting hole (12) and introduced into the venting path (VP) inside the cross beam (240) through the second gas inlet (251).

[0161] According to the above-described embodiment of the present invention, a venting path (VP) and a cooling path (CP) are provided not only in the cross beam (240) but also inside the cover frame (250), so that venting gas can be discharged in all directions surrounding the battery cell (100) or battery module (10), and at the same time, heat of the venting gas, etc. inside the venting path (VP) can be cooled. As a result, heat transmission to other adjacent battery modules (10) can be more efficiently suppressed or prevented.

[0162] At this time, the cover frame (250) may be provided with a second gas inlet (251) at a portion facing the venting hole (12). That is, the venting hole (12) may be formed at the upper portion of the module case (11) and configured to communicate with the venting path (VP) inside the cover frame (250). As in the embodiment illustrated in Fig. 16, the second gas inlet (251) may be provided at a position and / or size and / or number corresponding to the venting hole (12). Accordingly, the venting gas or the like may be induced to move directly toward the venting path (VP).

[0163] According to the above-described embodiment of the present invention, the venting gas, etc. discharged from the venting hole (12) facing the venting path (VP) can move directly to the venting path (VP) formed in the pack case (200), so the venting gas, etc. can be discharged to the outside more quickly and smoothly.

[0164] In addition, referring to FIGS. 16 and 18, the pack case (200) may be provided with a second gas exhaust port (252). The second gas exhaust port (252) may be configured to communicate between the venting path (VP) inside the cover frame (250) and the outside of the cover frame (250).

[0165] The second gas outlet (252) may be provided in the cover frame (250). In particular, the second gas outlet (252) may be provided between the bulkhead (W) and the lower cover (250b). As in the embodiment illustrated in FIG. 15, the second gas outlet (252) may be provided at the end of the venting path (VP) inside the cover frame (250). In this case, the second gas outlet (252) may be provided in the form of a hole, but the present invention is not limited by the specific type or shape of the second gas outlet (252).

[0166] Accordingly, the venting gas, etc., which has entered the venting path (VP) inside the cover frame (250) through the second gas inlet (251) can be discharged to the outside of the battery pack (1) through the second gas outlet (252). According to the above-described embodiment of the present invention, the venting gas, etc. can be quickly discharged to the outside of the pack case (200).

[0167] Referring again to FIG. 16, the pack case (200) may further include a second cooling communication hole (253). The second cooling communication hole (253) may be configured to communicate the cross beam (240) and the cover frame (250) with each other. That is, the second cooling communication hole (253) may be configured to communicate the cooling passage (CP) inside the cross beam (240) with the cooling passage (CP) inside the cover frame (250).

[0168] At this time, the second cooling communication hole (253) may be provided with any structure that allows the cooling path (CP) inside the cross beam (240) and the cooling path (CP) inside the cover frame (250) to communicate with each other.

[0169] For example, as in the embodiments illustrated in FIGS. 16 and 17, the bulkhead (W) may include an extension portion (E). The extension portion (E) may be configured such that at least a portion of the bulkhead (W) protrudes toward the cross beam (240). Specifically, the extension portion (E) may be configured such that a second cooling communication hole (253) is formed in at least a portion of the bulkhead (W), and extends toward the cross beam (240) along the outer periphery of the second cooling communication hole (253). That is, the second cooling communication hole (253) may be defined as a hollow space formed by the outer surface of the extension portion (E).

[0170] This extension (E) may be configured to be positioned within the cooling passage (CP) within the cross beam (240). The extension (E) may be configured to be inserted between one side of the cross beam (240) and a partition wall (W) within the cross beam (240). At this time, although not shown in the drawing, an insertion hole may be formed in the cross beam (240) into which the extension (E) is configured to be inserted. The insertion hole may be configured to communicate with the second cooling communication hole (253). Accordingly, the extension (E) may be configured to be connected to the cooling passage (CP) within the cross beam (240).

[0171] The extension (E) may be configured to be horizontally elongated along the cooling passage (CP) inside the cross beam (240). At this time, the extension (E) may be configured to correspond to the position and size of each cross beam (240). Alternatively, a plurality of extensions (E) may be provided for each cross beam (240) and configured to be horizontally spaced apart from each other along the cooling passage (CP) inside the cross beam (240). Alternatively, as in the embodiment illustrated in FIG. 17, one extension (E) may be provided for each cross beam (240). The shape of the extension (E) illustrated in FIG. 17 is an example, and the extension (E) may of course be configured to have other shapes or sizes.

[0172] Accordingly, as indicated by the solid arrow in Fig. 16, the cooling medium inside the cover frame (250) can be introduced into the cooling passage (CP) inside the cross beam (240) through the second cooling communication hole (253). According to the above-described embodiment of the present invention, the cooling medium flowing in the cooling passage (CP) inside the cover frame (250) can be smoothly introduced into the cooling passage (CP) inside the cross beam (240) by gravity.

[0173] Meanwhile, as illustrated in FIG. 16, the extension (E) may be configured to penetrate the lower cover (250b) and be coupled to the cross beam (240). That is, the extension (E) may be configured to penetrate the venting path (VP) of the cover frame (250). At this time, a cover penetration hole (254) configured to allow the extension (E) to penetrate may be formed in the lower cover (250b). As illustrated in FIG. 17, the cover penetration hole (254) may be provided between the second gas inlets (251) so that the extension (E) may be coupled at a position where the flow of the venting gas is not obstructed. As a result, the venting gas inside the venting path (VP) can flow in a space where the extension (E) is not provided.

[0174] Meanwhile, although not shown in the drawing, the second cooling communication hole (253) may be configured to be openable so that it is covered in the normal state of the battery pack (1) and opened when a thermal event, etc. occurs. Accordingly, in normal times, the cooling medium of the cooling passage (CP) inside the base frame (210) moves to the cooling passage (CP) inside the cross beam (240), and in an emergency, the cooling medium of the cooling passage (CP) inside the cover frame (250) may also move to the cooling passage (CP) inside the cross beam (240).

[0175]

[0176] FIG. 19 is a schematic perspective view of a vehicle including a battery pack according to one embodiment of the present invention.

[0177] Referring to FIG. 19, a vehicle (V) according to an embodiment of the present invention may include one or more battery packs (1) according to an embodiment of the present invention. The vehicle (V) according to the present invention may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. The vehicle (V) includes a four-wheel vehicle and a two-wheel vehicle. The vehicle (V) may operate by receiving power from a battery pack (1) according to an embodiment of the present invention.

[0178]

[0179] Although the present invention has been described above with reference to 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 idea of ​​the present invention and the equivalent scope of the claims to be described below by a person having ordinary skill in the art to which the present invention pertains.

Claims

1. A plurality of battery cells; and A battery pack characterized by comprising a pack case configured to accommodate the plurality of battery cells, a venting channel configured to allow venting gas discharged from the battery cells to flow in an internal space, and a cooling channel formed on at least one side of the venting channel and configured to allow a cooling medium to flow.

2. In paragraph 1, A battery pack, characterized in that the cooling path is arranged parallel to the venting path.

3. In paragraph 1, A battery pack, characterized in that the cooling path is provided outside the venting path.

4. In paragraph 1, The above pack case is A battery pack characterized by comprising a cross beam configured to partition the plurality of battery cells and in which the venting path and the cooling path are formed in the internal space.

5. In paragraph 4, The above cross beam A battery pack characterized in that a first gas inlet is provided so that the venting gas flows into the venting path.

6. In paragraph 5, A battery pack characterized in that it further includes a module case configured to accommodate the plurality of battery cells by grouping them, and having a venting hole formed on at least one side thereof so that the venting gas is discharged to the outside.

7. In paragraph 6, A battery pack characterized in that the venting hole is formed on a side of the module case and is configured to communicate with the venting path.

8. In paragraph 5, A battery pack characterized in that it further includes a cover member that covers the first gas inlet and is configured to be opened by heat or pressure.

9. In paragraph 4, The above pack case is A base frame configured to accommodate the cross beam and the plurality of battery cells, and having the cooling path formed in the internal space; A battery pack characterized by including a first cooling communication hole configured to communicate the base frame and the cross beam with each other.

10. In paragraph 1, The above pack case is A battery pack characterized by including a bulkhead provided between the venting path and the cooling path.

11. In paragraph 10, A battery pack, wherein the bulkhead is configured such that at least a portion of the bulkhead is opened by venting gas within the venting passage.

12. In paragraph 10, A battery pack, characterized in that the bulkhead has a protrusion configured to at least partially protrude toward the venting path.

13. In paragraph 4, The above pack case is A battery pack characterized by including a cover frame configured to cover the upper portion of the plurality of battery cells and in which the venting path and the cooling path are formed in an internal space.

14. In paragraph 13, A battery pack, characterized in that the cover frame has a second gas inlet configured to allow the venting gas to flow into the venting path.

15. In paragraph 13, The above pack case is A battery pack characterized by including a second cooling communication hole configured to communicate the cross beam and the cover frame with each other.

16. A vehicle comprising a battery pack according to any one of claims 1 to 15.

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