Battery pack and vehicle including same

Abstract

A battery pack according to one embodiment of the present invention may comprise: a pack case providing a module accommodation space for accommodating a battery module and including a pack body surrounding the module accommodation space and a reinforcing material disposed inside the pack body; and a battery module having a plurality of battery cells, wherein a space surrounded by the reinforcing material and at least a portion of the pack body may define at least a portion of a venting passage configured to discharge a venting gas discharged from the battery module to the outside.

Description

Battery pack and automobile including the same

[0001] The present invention relates to a battery pack and an automobile including the same.

[0002] This application is a priority application for Korean Patent Application No. 10-2025-0026687 filed on February 28, 2025, and all contents disclosed in the specification and drawings of said application are incorporated into this application by reference.

[0003]

[0004] Secondary batteries, which possess electrical characteristics such as high energy density and high applicability across product categories, are widely applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric sources.

[0005] These secondary batteries are attracting attention as a new energy source for improving eco-friendliness and energy efficiency, not only for the primary advantage of being able to drastically reduce the use of fossil fuels, but also because they do not generate any by-products from the use of energy.

[0006] Currently, widely used types of secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. When a high output voltage is required, multiple battery cells are connected in series to form a battery module or battery pack. Additionally, to increase charge / discharge capacity, multiple battery cells are connected in parallel to form a battery module or battery pack. Therefore, the number of battery cells included in the above battery module or pack can be set in various ways depending on the required output voltage or charge / discharge capacity.

[0007] Meanwhile, since battery cells 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 house these battery cells intensively within a module frame. Therefore, if a thermal event occurs in a single battery cell, the emitted high-temperature gases and flames can spread to adjacent cells, potentially leading to a chain reaction of explosions, making this extremely dangerous.

[0008] When a battery module contains multiple battery cells, high-temperature gases, flames, or sparks generated during thermal runaway in a specific battery cell may be ejected, causing thermal damage to the battery module as well as to components such as electric vehicles that use the battery module, or leading to structural collapse or fire.

[0009] Therefore, there is a need to develop a structure that can eliminate or minimize the impact of high-temperature gases or flames emitted from the battery module when a thermal event occurs in the battery module, on other components such as electric vehicles using the battery module or on passengers.

[0010] In addition, since the battery pack contains multiple battery modules, it is also necessary to prevent the propagation of thermal events (thermal runaway) between battery modules within the battery pack.

[0011]

[0012] The present invention, conceived in consideration of the aforementioned problems, aims to provide a battery pack capable of efficiently utilizing space while discharging high-temperature gas or flames caused by thermal events occurring inside a battery module, and an automobile including the same.

[0013] Another objective of the present invention is to provide a battery pack having a configuration and structure capable of preventing a thermal event occurring within one battery module from causing a thermal event in another battery module, and a vehicle including the same.

[0014] Another objective of the present invention is to provide a battery pack comprising a structure capable of maximally cooling high-temperature gas or flames resulting from a thermal event occurring inside a battery module during the process of being discharged to the outside, and an automobile comprising the same.

[0015] However, 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.

[0016]

[0017] A battery pack according to an embodiment of the present invention for solving the above-described problem comprises a battery module having a plurality of battery cells, a pack case having a pack body surrounding the module housing space and a reinforcing material disposed inside the pack body, and a space surrounded by at least a part of the reinforcing material and the pack body may define at least a part of a venting passage configured to allow venting gas discharged from the battery module to be discharged to the outside.

[0018] In addition, the above reinforcing material may be composed of a frame bar formed by extending in a predetermined direction.

[0019] Additionally, the reinforcing members are provided in multiple numbers and spaced apart, and at least a portion of the venting passage may be defined as a space surrounded by two or more of the reinforcing members and at least a portion of the pack body.

[0020] In addition, the battery module can define at least a portion of the venting passage together with the reinforcing material and the pack body.

[0021] In addition, the battery module may include a venting hole configured to discharge venting gas generated from the battery cell into the venting passage.

[0022] Additionally, the venting hole may be formed on one side of the battery module, and the battery pack according to one embodiment of the present invention may further include a first cooling plate arranged to cool the other side of the battery module, which is the opposite side of the one side.

[0023] In addition, a battery pack according to one embodiment of the present invention may further include a first pad disposed between the first cooling plate and the battery module and comprising a refractory material.

[0024] Additionally, the venting hole is formed on one surface of the battery module, and the battery pack according to one embodiment of the present invention may further include a second cooling plate arranged to cool the one surface.

[0025] In addition, at least a portion of the second cooling plate may be provided to define at least a portion of the venting passage.

[0026] In addition, the second cooling plate may include a cooling plate hole formed to allow venting gas to flow into the venting passage.

[0027] In addition, a battery pack according to one embodiment of the present invention may further include a second pad comprising a thermally conductive material disposed between the second cooling plate and the battery module.

[0028] And the second pad above may be configured to cover the one surface.

[0029] Additionally, the second cooling plate includes a plurality of spaced-apart unit cooling plates, and at least a portion of the venting passage may be disposed between the spaced-apart unit cooling plates.

[0030] Additionally, the battery module includes a venting hole configured to discharge venting gas generated from the battery cell into the venting passage, and the venting hole may be formed on one side of the battery module, and a battery pack according to one embodiment of the present invention may further include a first cooling plate arranged to cool the other side of the battery module which is the opposite side of the one side, a second cooling plate arranged to cool the one side, and a cover member having self-extinguishing properties that surrounds at least a part of the battery module.

[0031] An automobile according to one embodiment of the present invention may include the battery module or battery pack.

[0032]

[0033] A battery pack according to one embodiment of the present invention and an automobile including the same can stably discharge high-temperature gas or flames caused by a thermal event occurring inside a battery module in a predetermined direction.

[0034] In addition, a battery pack according to one embodiment of the present invention and a vehicle including the same can efficiently utilize the space occupied by components that discharge venting gas generated inside the battery module.

[0035] In addition, a battery pack according to one embodiment of the present invention and a vehicle including the same can simultaneously cool high-temperature gas or flames caused by a thermal event occurring inside the battery module while discharging them to the outside.

[0036] The effects of the embodiments 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 accompanying drawings.

[0037]

[0038] 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.

[0039] FIG. 1 is an exploded perspective view of a battery pack according to one embodiment of the present invention.

[0040] FIG. 2 is a perspective view of a battery pack according to one embodiment of the present invention.

[0041] FIG. 3 is a perspective view of a battery module of a battery pack according to one embodiment of the present invention.

[0042] FIG. 4 is a partial cross-sectional view of a battery pack according to one embodiment of the present invention.

[0043] FIG. 5 is a partial cross-sectional view of a battery pack according to another embodiment of the present invention.

[0044] FIG. 6 is a perspective view of a battery pack according to another embodiment of the present invention.

[0045] FIG. 7 is a partial cross-sectional view of a battery pack according to another embodiment of the present invention.

[0046] FIG. 8 is a perspective view of a battery pack according to another embodiment of the present invention.

[0047] FIG. 9 is an enlarged cross-sectional view of a battery pack according to another embodiment of the present invention.

[0048] FIG. 10 is an enlarged cross-sectional view of a battery pack according to another embodiment of the present invention.

[0049] FIG. 11 is an enlarged cross-sectional view of a battery pack according to another embodiment of the present invention.

[0050] FIG. 12 is a partial cross-sectional view of a battery pack according to another embodiment of the present invention.

[0051] FIG. 13 is an exploded perspective view of a battery pack according to another embodiment of the present invention.

[0052] FIG. 14 is a drawing for explaining a vehicle including a battery pack according to one embodiment of the present invention.

[0053]

[0054] 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.

[0055] Therefore, 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; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0056] In addition, the present invention includes various embodiments. For each embodiment, redundant descriptions of substantially identical or similar configurations are omitted, and the focus is on the differences.

[0057] Additionally, to aid in understanding the invention, the attached drawings are not drawn to actual scale, and the dimensions of some components may be exaggerated. Furthermore, the same reference numerals may be assigned to identical components in different embodiments.

[0058] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0059] In addition, where it is stated that one component is "connected" or "combined" to another component, it should be understood that while the components may be directly connected or combined with each other, another component may be "interposed" between each component, or each component may be "connected" or "combined" through another component.

[0060] Singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "composed of" or "comprising" should not be interpreted as necessarily including all of the various components or steps described in the specification, and should be interpreted as meaning that some of the components or steps may be omitted or additional components or steps may be included.

[0061] Throughout the specification, when "A and / or B" is used, it may mean A, B, or A and B unless specifically stated otherwise.

[0062] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back may be used in this specification, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art to which this invention pertains that they may vary depending on the position or arrangement, rotation, or position of the observer of the object in question.

[0063] Hereinafter, a battery pack according to embodiments of the present invention and a vehicle including the same will be described in detail with reference to FIGS. 1 to 14.

[0064] In this specification, unless otherwise specified, the X-axis direction is referred to as the lateral direction (horizontal direction), and the Z-axis direction orthogonal to the XY plane is referred to as the vertical direction (vertical direction).

[0065] FIG. 1 is an exploded perspective view of a battery pack according to an embodiment of the present invention. FIG. 2 is a perspective view of a battery pack according to an embodiment of the present invention. Hereinafter, a battery pack (1) according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2 together.

[0066] The battery pack (1) may include a pack case (100) and a battery module (200).

[0067] The pack case (100) includes a pack body (110) and a reinforcing material (120), and the pack body (110) can provide an internal space for accommodating a battery module (200). The reinforcing material (120) can supplement the rigidity of the pack case (100). The pack body (110) and the reinforcing material (120) will be described in more detail below.

[0068] The pack body (110) forms the overall exterior of the pack case (100) and can provide a module receiving space for accommodating a battery module (200). The pack body (110) can surround the module receiving space. The module receiving space can be defined as all or part of the space surrounded by the pack body (110).

[0069] The pack body (110) may be provided in the shape of a rectangular parallelepiped. The pack body (110) may be formed using a plurality of plates. The components of the pack body (110) may be joined by means such as welding or bolting. The module receiving space may be defined as the inner space of the plurality of plates forming the pack case (100).

[0070] The pack body (110) may include one or more unit plates. Referring to FIG. 1, the pack body (110) may include a pack top plate (111) and a pack tray (112). The pack tray (112) may form the lower surface and side of the pack body (110) to provide a module receiving space, and the pack top plate (111) may be configured to cover the upper surface of the module receiving space. The pack tray (112) may be formed integrally or may be formed including sub-components such as a bottom plate and a side plate.

[0071] A reinforcing material (120) may be placed on the inner side of the pack body (110). The reinforcing material (120) can improve the stiffness of the pack case (100). For example, referring to FIG. 1, the reinforcing material (120) may be placed on the inner side of the pack top plate (111) of the pack body (110) (in the -Z axis direction with respect to FIG. 1) to improve the stiffness of the entire pack body (110), including the pack top plate (111). As another example, the reinforcing material (120) may also be placed in other components of the pack body (110), such as the pack tray (112), to improve the stiffness of the adjacent components.

[0072] The reinforcing material (120) may include a material that is relatively stronger than the pack body (110). Generally, as the stronger the rigidity, the heavier the weight, the pack body (110), which occupies a large volume in the pack case (100), mainly includes a relatively light material, and by appropriately placing a reinforcing material (120) with high rigidity in the necessary locations, sufficient rigidity can be secured while minimizing the overall weight of the pack case (100).

[0073] The reinforcing material (120) can reinforce the resistance to deformation such as bending and twisting of the pack body (110). As the rigidity of the pack body (110) is reinforced, the rigidity of the pack case (100) containing it, and furthermore the entire battery pack (1), can also be reinforced.

[0074] For example, the pack body (110) may include a lightweight material as a main component, such as a lightweight and corrosion-resistant aluminum alloy, a strong plastic, or a composite material (polycarbonate, glass fiber reinforced plastic, carbon fiber reinforced plastic, etc.), while the reinforcing material (120) may include a material as a main component, such as stainless steel or titanium alloy, which has higher rigidity than the pack body (110), thereby minimizing the weight of the entire pack case (100) while ensuring sufficient rigidity.

[0075] The materials of the aforementioned pack body (110) and reinforcing material (120) are exemplary, and the material of the reinforcing material (120) is not particularly limited as long as it can supplement the strength of the pack body (110).

[0076] The battery module (200) may include a plurality of battery cells. The battery cells may be housed in the internal space of the battery module (200). The battery cells may be various types of secondary batteries known at the time of filing the present invention. For example, the battery cells may be lithium secondary batteries, but may also be other types of secondary batteries.

[0077] Meanwhile, the battery pack (1) may be provided with a passage for venting gas to the outside caused by a thermal event occurring in the battery module (200) or battery cell, which may be called a venting passage. At least a portion of the venting passage may be defined by some of the various components of the battery pack (1).

[0078] In particular, in the case of a battery pack according to the present invention, as shown in FIGS. 1 and 2, the space enclosed by the reinforcing material (120) and part of the pack body (110) can be at least part of the venting passage (V).

[0079] In the present invention, the fact that a configuration defines a venting passage (V) means that a configuration can close at least a portion of a space, and the closed space can be used as a venting passage (V). Additionally, the venting passage (V) may be defined by multiple configurations rather than just one.

[0080] FIG. 2 illustrates a battery pack (1) in which a battery module (200) is placed in a pack case (100). For convenience of explanation, the top plate (111) of FIG. 2 is shown spaced out in the upward direction (+Z-axis direction) to illustrate the components below it.

[0081] The space enclosed by the reinforcing material (120) and at least a part of the pack body (110) (e.g., the top plate of the pack (111)) may be at least a part of the venting passage (V) configured to allow the venting gas discharged from the battery module (200) to be discharged to the outside.

[0082] For example, the reinforcing material (120) can be placed in the lower direction of the pack top plate (111), and the space enclosed by the reinforcing material (120) and the pack body (110) can be utilized as a venting passage (V).

[0083] The reinforcing material (120) can define the boundary of the venting passage (V) while improving the structural rigidity of the battery pack (1). The reinforcing material (120) can be positioned to minimize interference with the battery module (200).

[0084] A venting outlet (E) may be formed in a portion of the pack body (110). The venting outlet (E) can discharge venting gas passing through the venting passage (V) to the outside. The venting outlet (E) may be connected to the venting passage (V). The venting outlet (E) may be connected to a point where venting gas is generated through the venting passage (V). The venting passage (V) can deliver venting gas generated from a battery cell, etc., to the venting outlet (E).

[0085] The arrow shown in FIG. 2 indicates the direction in which the venting gas passes through the venting passage (V). The venting gas generated in any one of the battery modules (200) can move through the venting passage (V) as indicated by the arrow in FIG. 2 and be discharged to the outside of the battery pack (1) through the venting outlet (E).

[0086] According to the above embodiment, at least a portion of the reinforcing material (120) and the pack body (110), which exist for the purpose of reinforcing rigidity, can be utilized as a venting passage (V) without any additional configuration for the venting passage (V). Accordingly, the internal space of the battery pack (1) can be utilized more efficiently, and since there is no need to add a separate structure for venting gas discharge, the weight of the entire battery pack (1) can be reduced.

[0087] In addition, since there is no separate space occupied by the venting passage (V), the volume of the battery pack (1) can be minimized, and accordingly, more battery cells can be accommodated within the pack case (100) of the same size, thereby improving the energy density of the battery pack (1).

[0088] In addition, as the formation of the venting passage (V) is structurally simplified, the manufacturing process of the battery pack (1) can be simplified, and a reduction in production costs can be expected due to the reduction in the number of parts. Furthermore, as the number of parts decreases, the reliability of the battery pack (1) can be improved and maintenance can be made easier.

[0089] The reinforcing member (120) may be configured in the shape of a frame bar that is extended in a predetermined direction. The reinforcing member (120) in the shape of a frame bar may include a material that does not bend easily or break. A venting passage (V) may be provided along the length direction of the reinforcing member (120) in the shape of a frame bar.

[0090] Depending on the direction in which the reinforcing material (120) in the shape of a frame bar is arranged, the direction in which the rigidity of the battery pack (1) is reinforced can be determined, and at the same time, the direction of flow of the venting gas through the venting passage (V) can also be determined.

[0091] For example, at least some of the reinforcing members (120) may be formed to extend in a direction across the length direction of the battery module (200). More specifically, a plurality of battery modules (200) may each have a length in a certain direction and may be arranged side by side. In this case, the reinforcing members (120) may be arranged so that their length direction is approximately perpendicular to the battery modules (200) arranged side by side.

[0092] As a more specific example, referring to FIGS. 1 and FIGS. 2, battery modules (200) can be arranged side by side, each having a length in the X-axis direction. At this time, reinforcing members (120) can be arranged to have a length in the Y-axis direction perpendicular to the X-axis direction, which is the length direction of the battery modules (200).

[0093] According to the above embodiment, the reinforcing member (120) can supplement the rigidity of the battery module (200). For example, since the battery modules (200) arranged side by side each have a length in a certain direction, they can secure a certain degree of self-rigidity against bending and breaking in the length direction of the battery module (200), but the rigidity in a direction approximately perpendicular to the direction in which rigidity is secured may be relatively insufficient. Therefore, the reinforcing member (120) in the shape of a frame bar arranged approximately perpendicular to the battery modules (200) can improve the durability and stability of the overall structure of the battery pack (1) by supplementing the rigidity in a direction that is difficult for the battery module (200) to secure on its own.

[0094] Meanwhile, unlike as illustrated in FIGS. 1 and 2, the reinforcing member (120) may be formed integrally with the pack body (110). For example, the reinforcing member (120) may be formed integrally with the pack top plate (111) to cover the module receiving space together with the pack top plate (111).

[0095] When the reinforcing material (120) and the pack top plate (111) are formed integrally, a separate joining process or additional member between the reinforcing material (120) and the pack top plate (111) is not required, so the manufacturing process can be simplified. In addition, the joint between the reinforcing material (120) and the pack top plate (111) is minimized, so the weight of the entire battery pack (1) can be reduced.

[0096] Referring to FIGS. 1 and 2, the reinforcing members (120) may be provided in multiple numbers and spaced apart. And at least a portion of the venting passage (V) may be defined as a space surrounded by two or more reinforcing members (120) and a portion of the pack body (110).

[0097] Specifically, a space may be formed between multiple reinforcing members (120) that are spaced apart, and this space may be used as a venting passage (V) through which venting gas generated from the battery module (200) is discharged to the outside.

[0098] For example, referring to FIG. 2, the reinforcing members (120) may be provided in multiple numbers and spaced apart by a predetermined distance in the X-axis direction. Also, at least a portion of the venting passage (V) may be defined as a space surrounded by at least two or more reinforcing members (120) and at least a portion of the pack body (110).

[0099] Two reinforcing members (120) each surround the side of one venting passage (V), and at least a part of the pack body (110) (e.g., the top plate of the pack (111)) can surround the top of the venting passage (V).

[0100] Multiple reinforcing members (120) may be arranged in various ways as needed. For example, referring to FIG. 2, battery modules (200) may be arranged in two rows, two reinforcing members (120) may be spaced apart for each row of battery modules (200), and a venting passage (V) may be formed between the two reinforcing members (120). According to the above embodiment, at least one venting passage (V) may be provided per row of battery modules (200), and at least one venting passage (V) may be provided for each of all battery modules (200). Each venting passage (V) may be connected to a venting outlet (E).

[0101] The number, shape, and arrangement of the plurality of spaced reinforcing members (120) shown in FIG. 2 are exemplary and may be provided differently as needed. More specifically, since the number, shape, and arrangement of the reinforcing members (120) can determine the number, shape, and arrangement of the venting passage (V), the reinforcing members (120) may also be provided according to the design of the venting path of the battery pack (1).

[0102] By spacedly arranging multiple reinforcing members (120) in the battery pack (1), the reinforcing members (120) can balance the rigidity of the pack case (100) not only in local areas but also in the entire area. Accordingly, resistance to external shocks or vibrations is improved, and the structural stability of the battery pack (1) can be increased.

[0103] Additionally, as multiple reinforcing materials (120) are arranged at regular intervals, the number of venting passages (V) formed together with the pack body (110) can be increased. This allows the venting gas discharged from the battery module (200) to be discharged to the outside more quickly and efficiently, and the dispersion effect of the venting gas is improved, thereby preventing the problem of concentration in a specific venting path.

[0104] In addition, as the number of venting passages (V) increases, the degree of freedom in designing the venting path of the battery pack (1) can be increased, and flexibility can be secured to select an optimal venting structure depending on the usage environment of the battery pack (1) or the mounting method in the vehicle. This can contribute to expanding the application range of the battery pack (1).

[0105] According to one embodiment of the present invention, the battery module (200) can define at least a portion of the venting passage (V) together with the reinforcing material (120) and the pack body (110).

[0106] Referring to FIG. 2, a reinforcing material (120) is placed on the lower side of the pack top plate (111), and battery modules (200) are placed on the lower side of the reinforcing material (120), and the upper surface of the battery modules (200) can surround the lower part of the venting passage (V). For example, the upper surface of the battery modules (200) can surround the lower part of the venting passage (V) and define a part of the venting passage (V).

[0107] According to the above embodiment, the ventong passage (V) is defined by utilizing the pack body (110), the reinforcing material (120), as well as a part of the battery module (200), thereby allowing for more efficient utilization of the space of the battery pack (1), further reducing the weight and volume of the battery pack (1), and further improving the energy density of the battery pack (1).

[0108] In addition, according to the above embodiment, since a portion of the venting passage (V) is defined along the outer edge (e.g., the top surface) of the battery module (200), the venting gas generated in the battery module (200) can be discharged at a location closer to the venting passage (V). Accordingly, the residence time required during the process of venting gas being discharged to the outside is shortened, and the rise in internal temperature can be minimized, thereby further improving the thermal safety of the battery pack (1).

[0109] In addition, since the battery module (200) directly defines a part of the venting passage (V), no separate additional parts are required to form the venting passage (V), so the manufacturing process of the battery pack (1) can be simplified, and cost reduction and weight reduction effects due to the reduction in the number of parts can also be expected.

[0110] FIG. 3 is a perspective view of a battery module of a battery pack according to one embodiment of the present invention. FIG. 4 is a partial cross-sectional view of a battery pack according to one embodiment of the present invention.

[0111] FIG. 4 illustrates a portion of the A-A' cross-section of the battery pack (1) of FIG. 2. The venting passage (V) of the battery pack (1) will be described below with further reference to FIG. 3 and FIG. 4.

[0112] The battery pack (1) of FIGS. 3 and 4 may include the configurations described above with reference to FIGS. 1 and 2.

[0113] Referring to FIGS. 3 and 4, the battery module (200) may include a venting hole (H). This venting hole (H) may be configured to allow venting gas generated from the battery cell (210) to be discharged into a venting passage (V). In this embodiment, the venting gas discharged through the venting hole (H) may flow along the venting passage (V), which is a space formed between the reinforcing material (120), the pack body (110) (e.g., the pack top plate (111)), and another battery module (200).

[0114] Referring to FIG. 3, the battery module (200) may further include a module case (220) that provides a cell receiving space for receiving a battery cell (210). The module case (220) forms the overall exterior of the battery module (200) and can receive a battery cell (210) in the cell receiving space inside.

[0115] The venting hole (H) may be formed in a part of the battery module (200). For example, the venting hole (H) may be formed in the module case (220). The venting hole (H) may be a hole formed in a part of the module case (220).

[0116] The battery cell (210) is completely sealed but may include a discharge area formed in the vicinity of the venting hole (H). The discharge area may be configured to facilitate the discharge of gas generated inside the battery cell. For example, the discharge area may be implemented in the form of a discharge hole, a notch, or a preliminary break line, but is not limited thereto.

[0117] The exhaust area is an area that is opened to discharge high-temperature gas when high-temperature gas is generated inside the battery cell (210), so it may be a part that is relatively weakly sealed compared to other parts of the battery cell (210). The exhaust area may be a part that is structured to allow venting gas inside the battery cell (210) to be discharged through that part. The exhaust area may also be configured so that the gas discharged from the battery cell (210) cannot move to other parts and can only move to and be discharged in a specific part.

[0118] A battery cell (210) can be accommodated in a cell receiving space inside a module case (220). As described above, the battery cell (210) may be a secondary battery of various forms known at the time of filing the present invention. A plurality of battery cells (210) each have an electrode and can be electrically connected to one another. For example, a plurality of battery cells (210) can be electrically connected by a busbar frame (not shown), etc. The electrical connection between the battery cells (210) can be made in series or in parallel depending on the required voltage and current.

[0119] The module case (220) may provide a cell receiving space for accommodating a plurality of battery cells (210). The module case (220) may have a venting hole (H) formed therein configured to discharge venting gas generated from the battery cells (210) into a venting passage (V).

[0120] For example, the arrow in FIG. 4 may indicate the direction in which the venting gas generated in the battery cell (210) flows through the venting hole (H) to the venting passage (V).

[0121] Referring to FIG. 4, the venting hole (H) can be placed between two reinforcing members (120).

[0122] Referring to FIG. 4, the venting hole (H) can be connected to the venting passage (V). Venting gas flowing through the venting hole (H) into the venting passage (V) between the two reinforcing members (120) can be discharged to the outside through the venting outlet (E). The venting hole (H) can serve as a path for flowing gas generated inside the battery module (200) into the venting passage (V), and the pressure inside the battery module (200) can be effectively controlled through the venting hole (H).

[0123] Additionally, by forming a venting hole (H) in the module case (220) of the battery module (200), the venting gas generated from the battery cell (210) can be effectively controlled, and the disorderly diffusion of gas in the cell receiving space inside the battery module (200) can be prevented. Accordingly, the thermal stability inside the battery pack (1) can be improved, and the stability of the battery pack (1) can be further increased by unifying the direction of venting gas discharge.

[0124] In addition, since a venting hole (H) is formed in the module case (220), gas discharge can be controlled at the battery module (200) unit, thereby preventing the venting gas generated in a specific battery cell (210) from spreading to the battery cell (210) of an adjacent battery module (200). As a result, thermal runaway between battery modules (200) can be minimized, and the risk of explosion and fire of the battery pack (1) can be reduced.

[0125] Additionally, the module case (220) may include an additional blocking structure or a gas discharge guide centered on the area where the venting hole (H) is formed, thereby allowing the venting gas to be discharged more smoothly. This structure can prevent damage to the components within the battery module (200) during venting gas discharge and contribute to stable long-term use.

[0126] Meanwhile, unlike as illustrated in FIG. 3, the battery module (200) may not include a module case (220). Specifically, the battery cell (210) may not be placed in the internal space of the module case (220) but may be directly accommodated in the module receiving space inside the pack case (100). The battery pack (1) may include the battery cell (210) but not include the module case (220), and the components of the battery pack (1), such as the pack case (100) and pack body (110), may be configured to perform the function of the module case.

[0127] A battery pack (1) of this type can be called a Cell-to-Pack (CTP) because the battery cells (210) are directly housed in the pack case (100) without a module case. The technical concept of the present invention can also be applied to a battery pack (1) of the CTP type.

[0128] The technical concept of the present invention is not limited to the structure of a specific battery module (200), and can encompass not only a structure including a module case (220) but also a Cell-to-Pack (CTP) structure in which a battery cell (210) is directly housed in a pack case (100).

[0129] Throughout this specification, the venting hole (H) may be understood in a broad sense as a passage or hole of a relatively short path that can allow venting gas generated from the battery cell (210) to flow into the venting passage (V). Accordingly, the venting hole (H) may be formed in the module case (220), may be formed in the battery cell (210), or may be formed in a specific configuration of the pack case (100), and is not limited to the above examples.

[0130] For example, if a venting hole (H) is formed in the module case (220), the module case (220) can perform the function of regulating the venting gas to relieve the internal pressure of the battery pack (1) and prevent thermal runaway spread.

[0131] In another example, in a CTP structure in which a venting hole (H) is formed in the battery cell (210) itself, the venting gas can be directly discharged into the venting passage (V) of the pack case (100), thereby improving the gas discharge speed. The venting hole (H) is normally closed and can be opened only when a thermal event occurs in the battery cell (210). In this case, the venting hole (H) may have a configuration that is the same as or similar to the discharge area of ​​the battery cell (210).

[0132] As described above, the venting hole (H) can be applied to various battery pack (1) designs, and the function and role of the venting hole (H) can be maintained even if the internal structure of the battery pack (1) is deformed. The technical concept of the present invention can contribute to ensuring the thermal safety of the battery pack (1) regardless of the presence or absence of the module case (220).

[0133] FIG. 5 is a partial cross-sectional view of a battery pack according to another embodiment of the present invention. The battery pack (1) of FIG. 5 includes the configurations described above with reference to FIG. 1 to FIG. 4, but may include additional configurations.

[0134] FIG. 5 illustrates a portion of the A-A' cross-section of the battery pack (1) of FIG. 2, similar to FIG. 4. However, there is a difference in that it illustrates an embodiment that further includes a first cooling plate (300) in addition to the embodiment illustrated in FIG. 4. The venting passage (V) of the battery pack (1) will be described below with reference to FIG. 5.

[0135] The battery pack (1) may include a venting hole (H). In this case, the surface of the battery module (200) where the venting hole (H) is formed may be referred to as 'one surface'. The venting hole (H) may be formed on one surface of the battery module (200). For example, referring to FIG. 5, the venting hole (H) may be formed on the upper surface (the surface facing the +Z-axis direction) of the battery module (200).

[0136] The battery pack (1) may further include a first cooling plate (300). The first cooling plate (300) may function as a heat sink. The first cooling plate (300) is intended to cool a portion of the battery module (200) and may include a metal material with relatively high thermal conductivity. For example, the first cooling plate (300) may include copper, aluminum or an alloy thereof, or ceramic, graphite, carbon fiber, plastic composite material, etc. The first cooling plate (300) may come into contact with the battery module (200) over as large an area as possible.

[0137] The first cooling plate (300) may be positioned to cool the other side of the battery module (200), which is the opposite side of the one side of the battery module (200) in which the venting hole (H) is formed. For example, referring to FIG. 5, in an embodiment in which the venting hole (H) is formed on the upper surface of the battery module (200), the first cooling plate (300) may be positioned on the lower surface (the side facing the Z-axis direction), which is the opposite side of the upper surface of the battery module (200).

[0138] As described above, the battery module (200) can vent gas through the venting hole (H). And the first cooling plate (300) can cool the opposite side of the battery module (200) from where the venting gas is discharged.

[0139] In addition, the first cooling plate (300) can perform not only a simple cooling function but also a role of guiding the direction of venting gas discharge. The first cooling plate (300) is arranged in a structure that covers the other side (the bottom side, referring to FIG. 5) of the battery module (200), thereby preventing the venting gas from leaking out in the opposite direction of the venting hole (H).

[0140] Specifically, since the venting gas has high pressure and temperature, it is possible for it to diffuse in various directions when discharged. According to an embodiment of the present invention, by physically blocking the other side of the battery module (200) with the first cooling plate (300), the venting gas can be guided to be discharged toward the side where the venting hole (H) is formed, rather than leaking out in the blocked direction.

[0141] The first cooling plate (300) can not only serve to restrict the direction of venting gas outflow, but also perform a structural reinforcement role for the battery module (200). That is, when venting gas is generated inside the battery module (200), the internal pressure may suddenly rise, causing deformation of the battery module (200). However, the first cooling plate (300) can support the other side of the battery module (200), thereby suppressing deformation caused by the rise in internal pressure.

[0142] Additionally, referring to FIG. 5, the first cooling plate (300) can be formed to not only perform a heat dissipation function but also include a structure in which cooling water (310) can circulate inside, thereby more effectively removing heat from the battery module (200).

[0143] The cooling water (310) may contain water. Additionally, the cooling water may further contain glycol-based coolants (e.g., ethylene glycol, propylene glycol, etc.), electrical insulating oil, silicone oil, fluorine-based coolants (e.g., fluorinated hydrocarbon-based coolants), etc. Each of these may provide high thermal conductivity, electrical insulation, and chemical stability.

[0144] When the first cooling plate (300) is formed with a structure containing cooling water (310) inside, it can rapidly absorb heat generated from the battery module (200) and release it to the outside, thereby maintaining the temperature balance of the battery pack (1) and reducing the risk of performance degradation and thermal runaway due to overheating.

[0145] According to the battery pack (1) of the above embodiment, the first cooling plate (300) can physically block the other side of the battery module (200) so that the venting gas is not leaked in the direction in which the first cooling plate (300) is positioned, but is instead guided to be discharged toward the side where the venting hole (H) is formed. Therefore, furthermore, the first cooling plate (300) can guide the venting gas to be smoothly discharged through the venting hole (H) and simultaneously contribute to maintaining the structural stability of the battery module (200).

[0146] Referring to FIG. 5, the battery pack (1) may further include a first pad (400). The first pad (400) is placed between the first cooling plate (300) and the battery module (200) and may include a fire-resistant material.

[0147] The first pad (400) may be composed of a material with excellent heat resistance so as to maintain its shape despite thermal events that may occur in the battery module (200). The first pad (400) may improve the thermal safety of the battery pack (1) by including a refractory material that has minimal deformation even at high temperatures and can maintain a certain structural strength. For example, the first pad (400) may include materials such as silica aerogel, refractory ceramic fibers, inorganic composites, and heat-resistant polymer materials, but is not limited thereto.

[0148] The first pad (400), together with the first cooling plate (300), can serve to guide the venting gas generated in the battery module (200) to be discharged through the venting hole (H). By supplementing the blocking function of the first cooling plate (300), the first pad (400) ensures that the venting gas does not leak in an unnecessary direction and flows along a set venting path.

[0149] Specifically, the first pad (400) is positioned together with the first cooling plate (300) on the opposite side of the venting hole (H), so that even if venting gas is generated in the battery module (200), the gas is not dispersed in an unintended direction and is discharged through the venting hole (H).

[0150] When a thermal event occurs in the battery module (200), the high-temperature venting gas generated internally can rapidly spread with high pressure. During this process, the venting gas has a tendency to spread in multiple directions, and the first pad (400) can perform the function of physically blocking the opposite side of the venting hole (H) to induce the venting gas to flow only in a specific direction.

[0151] In particular, since the first pad (400) is composed of a fire-resistant material with high durability, it can maintain its original shape even if a thermal event persists for a long time. Accordingly, the venting gas generated from the battery module (200) can be continuously guided to flow along the expected exhaust path, and the gas can be prevented from spreading to the opposite side of the first cooling plate (300).

[0152] Additionally, the first pad (400) can serve to minimize the thermal impact on surrounding components while the venting gas is moving. Because it contains a material with excellent fire resistance, it can maintain a heat shielding function even when the venting gas comes into contact, and can control the temperature distribution inside the battery pack (1) more uniformly.

[0153] In this way, the first pad (400) is positioned together with the first cooling plate (300) to help the venting gas be stably discharged along the set path and to improve the thermal stability of the battery pack (1).

[0154] Additionally, the first pad (400) can serve as a thermal buffer between the battery module (200) and the first cooling plate (300). That is, it can prevent high-temperature heat generated in the battery module (200) from being rapidly transferred to the first cooling plate (300), thereby enabling the first cooling plate (300) to absorb and release heat more stably. Through this, the first cooling plate (300) can be prevented from receiving an excessive heat load and from having reduced cooling efficiency.

[0155] In addition, the first pad (400) can also perform the role of blocking flames generated from the battery module (200) from coming into direct contact with the first cooling plate (300). As a result, structural deformation of the first cooling plate (300) is suppressed, and the external structure of the battery pack (1) can be prevented from being damaged by heat.

[0156] According to the above embodiment, the first pad (400) contributes to securing the thermal safety of the battery pack (1), maintains a constant exhaust path of the venting gas, complements the cooling function of the first cooling plate (300), and can be controlled to enable stable heat release.

[0157] FIG. 6 is a perspective view of a battery pack according to one embodiment of the present invention. FIG. 7 is a partial cross-sectional view of a battery pack according to another embodiment of the present invention.

[0158] The battery pack (1) of FIGS. 6 and 7 may include the configurations described above with reference to other drawings. FIG. 7 illustrates a portion of the B-B' cross-section of the battery pack (1) of FIG. 6. The venting passage (V) of the battery pack (1) will be described below with further reference to FIGS. 6 and 7.

[0159] As described above with reference to FIG. 5, the battery pack (1) may include a venting hole (H), and the surface in the battery module (200) where the venting hole (H) is formed may be referred to as 'one surface'.

[0160] Referring to FIGS. 6 and 7, the battery pack (1) may further include a second cooling plate (500). The second cooling plate (500) may function as a heat sink and may be applied as a component for cooling a portion of the battery module (200). The second cooling plate (500) may include a metal or composite material with high thermal conductivity. For example, the second cooling plate (500) may include copper, aluminum or an alloy thereof, ceramic, graphite, carbon fiber, plastic composite material, etc.

[0161] The second cooling plate (500) may also be formed to more effectively remove heat from the battery module (200) by including a structure that not only performs a heat dissipation function but also allows cooling water (510) to circulate inside. The cooling water (510) may include water. Additionally, the cooling water may further include one or more of glycol-based coolants (e.g., ethylene glycol, propylene glycol, etc.), electrical insulating oil, silicone oil, fluorine-based coolants (e.g., fluorinated hydrocarbon-based coolants), and each of which may provide high thermal conductivity, electrical insulation, and chemical stability.

[0162] When the second cooling plate (500) is formed with a structure containing cooling water (510) inside, it can rapidly absorb heat generated from the battery module (200) and release it to the outside, thereby maintaining the temperature balance of the battery pack (1) and reducing the risk of performance degradation and thermal runaway due to overheating.

[0163] The second cooling plate (500) can be placed on one side of the battery module (200), that is, on the side where the venting hole (H) is formed. If the venting hole (H) is formed on the upper surface of the battery module (200), the second cooling plate (500) can be placed to contact the upper surface (the side facing the +Z-axis direction) of the battery module (200).

[0164] When a thermal event occurs in the battery module (200), venting gas may be rapidly discharged through the venting hole (H) due to an increase in internal pressure. During this process, the temperature around the venting hole (H) may rise rapidly, and the venting gas may affect adjacent components.

[0165] By cooling the area adjacent to the venting hole (H), the second cooling plate (500) can lower the temperature around the venting hole (H) and prevent one side of the battery module (200) from suffering thermal damage during the process of venting gas discharge. Since the venting gas has a high temperature and may contain combustion products, there is a possibility that one side of the battery module (200) may be deformed or damaged during the process of venting gas discharge. The second cooling plate (500) can serve to mitigate such thermal damage.

[0166] Additionally, the second cooling plate (500) can serve to stabilize the rate at which the venting gas is discharged. When the venting gas is discharged, if the surface of the battery module (200) is excessively heated, local temperature differences may occur, which may cause an imbalance in the discharge flow of the venting gas. By maintaining a uniform temperature around the venting hole (H), the second cooling plate (500) can enable the venting gas to be discharged more smoothly and at a constant rate.

[0167] Furthermore, the second cooling plate (500) can serve to maintain the structural stability of the battery module (200). When venting gas is discharged, one side of the battery module (200) may expand or deform due to high pressure and temperature. By positioning the second cooling plate (500) in contact with one side of the battery module (200), mechanical deformation that may occur during the venting process can be suppressed, and the durability of the battery module (200) can be improved.

[0168] The second cooling plate (500) can rapidly lower the temperature of the battery module (200) after the venting gas is discharged. If the temperature of the battery module (200) remains high for a long time even after a thermal event has occurred, there is a possibility that additional chemical reactions may be promoted, which may reduce the safety of the battery pack (1). By effectively cooling one side of the battery module (200) with the second cooling plate (500), the temperature of the battery module (200) can be stabilized more quickly.

[0169] Furthermore, the second cooling plate (500) is positioned on the upper surface of the battery pack (1) and can serve to protect vehicle parts located on the upper surface of the battery pack (1). Generally, the battery pack (1) is mounted on the lower surface of the vehicle, and the vehicle's chassis, passenger seat, or other vehicle parts may be positioned on the upper surface of the battery pack (1).

[0170] In this structure, the second cooling plate (500) is positioned along the upper surface of the battery pack (1), but the venting hole (H) portion may be formed in an open state. This ensures that the venting gas can be smoothly discharged while cooling the upper area of ​​the battery pack (1), including the area around the venting hole (H).

[0171] According to the battery pack (1) of the above embodiment, the high temperature generated during the venting process can be suppressed from being transferred to the upper part of the battery pack (1), and the vehicle parts located on the upper part of the battery pack (1) can be prevented from suffering thermal damage. In addition, the second cooling plate (500) has a structure that covers at least a part of the battery pack (1), thereby providing protection against external impact and improving the durability of the battery pack (1).

[0172] In this way, the second cooling plate (500) directly cools one side of the battery module (200) in which the venting hole (H) is formed, thereby preventing thermal damage occurring during the venting process, maintaining a uniform gas discharge flow, and ensuring the structural stability of the battery module (200). Additionally, it can rapidly lower the temperature of the battery module (200) after venting to improve the overall thermal safety of the battery pack (1) and can perform the function of protecting the vehicle components located on the upper part of the battery pack (1).

[0173] Referring to FIG. 6, at least a portion of the second cooling plate (500) may be provided to define at least a portion of the venting passage (V). More specifically, at least a portion of the second cooling plate (500), excluding the cooling plate hole (H'), may define the lower region of the venting passage (V).

[0174] As described above, the battery pack (1) may include a venting passage (V), and the venting passage (V) may provide a path for the venting gas discharged from the battery module (200) to flow. And the second cooling plate (500) may be placed on one side (the side facing the +Z-axis direction) of the battery module (200) where the venting hole (H) is formed.

[0175] The second cooling plate (500) may be formed with a structure in which a portion of the area is open so as not to block the venting hole (H) itself, and may be positioned to cover one side of the battery module (200) along an area spaced apart from the venting hole (H). Accordingly, a portion of the second cooling plate (500) may act as an element defining at least a portion of the venting passage (V).

[0176] Specifically, referring to FIG. 6, the venting gas is generated in the battery module (200), discharged through the venting hole (H), and then flows in the direction of the arrow between the upper surface of the battery module (200) and the lower surface of the second cooling plate (500). In the embodiment described above with reference to FIG. 2, the structure was such that the venting gas flowed along the outer surface of the battery module (200), whereas in the embodiment described with reference to FIG. 6 and FIG. 7, the venting gas flows along the space between the battery module (200) and the second cooling plate (500) and is affected by the second cooling plate (500).

[0177] By having the second cooling plate (500) define a portion of the venting passage (V), the cooling effect on the venting gas can be increased by allowing it to flow along the second cooling plate (500) compared to the existing structure in which the venting gas flows along the outer surface of the battery module (200). Since the second cooling plate (500) can be formed of a material having high thermal conductivity (e.g., copper, aluminum, graphite, etc.), the venting gas can be cooled more quickly through contact with the second cooling plate (500) while flowing. Therefore, according to the above embodiment, the temperature of the venting gas flowing along the venting passage (V) can be lowered more effectively.

[0178] In addition, as the cooling rate of the venting gas increases, the temperature distribution inside the battery pack (1) can be maintained more uniformly. If the venting gas flows through the battery pack (1) while maintaining a high temperature, there is a possibility that adjacent components may suffer thermal damage or additional thermal reactions may occur. According to the above embodiment, these negative effects can be minimized as the temperature of the venting gas decreases while passing through the second cooling plate (500).

[0179] Additionally, as the venting gas is discharged to the outside at a lower temperature, the thermal impact on vehicle parts located near the battery pack (1) can be reduced. Generally, the battery pack (1) is located at the bottom of the vehicle, and the vehicle's chassis, passenger seat floor structure, electronic devices, etc., may be located near the battery pack (1). Since the second cooling plate (500) forms part of the venting passage (V), the venting gas can be cooled before being discharged, thereby reducing the possibility of structures near the battery pack (1) being damaged by heat.

[0180] Furthermore, as heat is dispersed as the venting gas comes into contact with the second cooling plate (500), the flow velocity of the venting gas can become more uniform. If the flow velocity of the venting gas increases rapidly or turbulence is formed in a specific area, there is a possibility that the venting gas may deviate from the expected discharge path or that heat may be concentrated locally in some areas. According to the above embodiment, since the second cooling plate (500) forms part of the venting passage (V), the gas flow is maintained constant, and uniform discharge of the venting gas is possible.

[0181] As shown in the above embodiment, by defining a part of the second cooling plate (500) as a part of the venting passage (V), the cooling effect of the venting gas can be increased, the thermal management performance inside the battery pack (1) can be improved, and the thermal effect on adjacent components can be minimized.

[0182] Referring to FIGS. 6 and 7, the second cooling plate (500) may further include a cooling plate hole (H') formed to allow venting gas to flow into the venting passage (V). The cooling plate hole (H') may be formed on the lower side of the venting passage (V) so that the venting gas can be discharged smoothly.

[0183] For example, the cooling plate hole (H') can be formed at a position corresponding to the venting hole (H). The cooling plate hole (H') can be positioned to be aligned with the venting hole (H) and can be formed with a size equal to or larger than that of the venting hole (H). By aligning the venting hole (H) and the cooling plate hole (H'), the venting gas can be smoothly discharged without additional obstructions.

[0184] By forming a cooling plate hole (H') in the second cooling plate (500), even if the second cooling plate (500) is positioned above the venting hole (H), the venting gas can be discharged smoothly through the venting passage (V) without obstruction.

[0185] In addition, as the venting gas flows through the cooling plate hole (H'), the second cooling plate (500) can come into contact with the venting gas and absorb heat. Accordingly, the temperature of the venting gas can be effectively lowered, and the rise in temperature inside the battery pack (1) can be suppressed.

[0186] In addition, the cooling plate hole (H') is formed to correspond to the venting hole (H), so that the venting gas can be discharged in a consistent direction. If the venting hole (H) and the cooling plate hole (H') are not aligned or do not match in size, the flow of the venting gas may be obstructed, and the flow of the gas may become irregular. If the cooling plate hole (H') is formed to be the same size as or approximately similar to the venting hole (H), the venting gas can be discharged at a constant speed, and the thermal stability of the battery pack (1) can be improved.

[0187] In addition, the second cooling plate (500) has a structure capable of directly cooling the venting gas, so that high-temperature gas generated in the battery module (200) can be prevented from being discharged to the outside without being cooled. Accordingly, it is possible to prevent the vehicle parts located on the upper part of the battery pack (1) from being damaged by heat, and the durability of the battery pack (1) can be improved.

[0188] According to the above embodiment, a cooling plate hole (H') is formed in the second cooling plate (500), thereby allowing for smooth discharge of the venting gas while simultaneously cooling it, and improving the cooling performance and thermal safety of the battery pack (1).

[0189] Referring to FIG. 7, the battery pack (1) may further include a second pad (600). The second pad (600) may be placed between the second cooling plate (500) and the battery module (200) and may include a thermally conductive material.

[0190] The second pad (600) may include a material with excellent thermal conductivity so that it can function as a heat transfer medium between the battery module (200) and the second cooling plate (500). The second pad (600) may be composed of a material designed to have high thermal conductivity and to burn or melt rapidly above a certain temperature. For example, the second pad (600) may include flame-retardant materials such as a thermally conductive polymer, an organic silicon-based thermally conductive pad, or a low-melting point ceramic composite. By including such materials, heat generated from the battery module (200) can be transferred more uniformly to the second cooling plate (500), and the cooling effect of the second cooling plate (500) can be maximized.

[0191] By including a second pad (600), the second pad (600) can evenly transfer heat generated from the battery module (200) to the second cooling plate (500), thereby improving cooling performance. As the heat transfer efficiency of the second cooling plate (500) increases, the temperature of the battery module (200) can be maintained more stably.

[0192] According to one embodiment of the present invention, the second pad (600) may be configured to cover one side of the battery module (200). Specifically, the second pad (600) may include a venting hole (H) to cover one side of the battery module (200) entirely.

[0193] The second pad (600) can be positioned to cover the venting hole (H) of the battery module (200). In the normal operating state of the battery pack (1), the second pad (600) can be positioned to block the venting hole (H). When a thermal event occurs in a specific battery cell (210), the second pad (600) at the venting hole (H) where the thermal event occurred can be rapidly burned or melted and removed by high heat. Accordingly, the venting hole (H) is opened, allowing the venting gas of the battery cell (210) where thermal runaway occurred to be smoothly discharged.

[0194] Meanwhile, the venting hole (H) of another battery cell (210) in which no thermal event has occurred may remain blocked by the second pad (600). As a result, the second pad (600) can prevent venting gas emitted from the cell in which the thermal event occurred from flowing into the venting hole (H) of the adjacent battery cell (210), and can suppress thermal propagation in which the thermal event is transmitted in a chain.

[0195] Additionally, the second pad (600) is positioned to block the venting hole (H), but in the event of a thermal event, it is quickly removed from the corresponding battery cell (210) to allow the venting gas to be properly discharged. This prevents the internal pressure of the battery pack (1) from rising rapidly and improves the safety of the battery pack (1).

[0196] By keeping the venting hole (H) of the battery cell (210) where no thermal event has occurred blocked by the second pad (600), the venting gas can be prevented from abnormally flowing into the adjacent battery cell (210). Accordingly, the phenomenon of thermal runaway spreading in a chain reaction can be effectively suppressed, and the safety of the entire battery pack (1) can be increased.

[0197] According to the above embodiment, since the second pad (600) can be formed with a structure having both thermal conductivity and flame retardancy, the thermal management system of the battery pack (1) can be designed more precisely. That is, while allowing heat to be transferred to the cooling system normally, it can function as a safety device by preventing the propagation of thermal runaway in the event of an abnormal thermal event.

[0198] The second pad (600) can improve the overall performance and safety of the battery pack (1) by optimizing heat transfer between the battery module (200) and the second cooling plate (500) while simultaneously performing a thermal runaway prevention function.

[0199] Meanwhile, at least a portion of the second cooling plate (500) may be provided to be in contact with the reinforcing material (120). For example, referring to FIGS. 6 and 7, the battery pack (1) may include the second cooling plate (500) and the reinforcing material (120), and at least a portion of the second cooling plate (500) may be formed to be in contact with the reinforcing material (120).

[0200] As described above, the reinforcing material (120) can be formed from a metal material such as stainless steel or titanium alloy and can have high thermal conductivity. In this embodiment, at least a portion of the second cooling plate (500) can be arranged to be in contact with the reinforcing material (120) having high thermal conductivity.

[0201] By the second cooling plate (500) coming into contact with a reinforcing material (120) having high thermal conductivity, heat transferred through the second cooling plate (500) can be transferred to the reinforcing material (120). Accordingly, the heat load on the second cooling plate (500) can be distributed, and the cooling efficiency can be improved.

[0202] According to the above embodiment, the reinforcing material (120) can contribute to maintaining thermal balance inside the battery pack (1) together with the second cooling plate (500). Referring to FIG. 6, since the reinforcing material (120) can be structurally arranged in a spaced-apart manner within the battery pack (1), it is possible to prevent heat from concentrating in a specific local area and to form a more uniform heat distribution.

[0203] Furthermore, by utilizing the reinforcing material (120) as part of the cooling system, the cooling performance of the battery pack (1) can be improved while reducing the need for additional cooling structures. This allows the design of the battery pack (1) to be more concise and minimizes weight increase.

[0204] Additionally, since the reinforcing material (120) can define at least a portion of the venting passage (V), it can effectively control the heat inside the venting passage (V) through which the venting gas flows. The venting gas has a high temperature and, if not vented quickly, can affect other components inside the battery pack (1). By the reinforcing material (120) absorbing the heat of the venting gas passing through the venting passage (V) and releasing it to the outside of the battery pack (1), the temperature of the venting gas can be further lowered, and the safety of the battery pack (1) can be improved.

[0205] According to the above embodiment, at least a portion of the second cooling plate (500) is in contact with the reinforcing material (120), thereby improving the cooling performance of the battery pack (1), optimizing heat distribution, and contributing to maintaining the structural stability of the battery pack (1).

[0206] FIG. 8 is a perspective view of a battery pack according to another embodiment of the present invention.

[0207] The battery pack (1) of the embodiment with reference to FIG. 8 includes the same or similar configurations as the battery pack (1) described with reference to FIG. 6 and FIG. 7, but may include additional configurations.

[0208] Referring to FIG. 8, the second cooling plate (500) may include a plurality of spaced-apart unit cooling plates. The unit cooling plates may have the same configuration as the second cooling plate (500), but may be part of the second cooling plate (500) in a form separated into multiple parts.

[0209] At least a portion of the venting passage (V) can be placed between spaced-apart unit cooling plates.

[0210] The second cooling plate (500) may be placed on one side of the battery module (200) (the side facing the +Z-axis direction) and may be composed of a plurality of unit cooling plates spaced apart so as not to obstruct the discharge of venting gas. Each unit cooling plate may be placed to cover a specific area of ​​the battery module (200), and the spaced-apart space between the unit cooling plates may define part of the venting passage (V).

[0211] As the second cooling plate (500) is divided into unit cooling plates, the area of ​​the battery module (200) where the venting hole (H) is formed can remain open without being covered by the unit cooling plates. Accordingly, when venting gas is discharged, it can flow smoothly along the space between the unit cooling plates and can be effectively discharged to the outside of the battery pack (1) through the venting passage (V).

[0212] By forming the second cooling plate (500) with a plurality of unit cooling plates, a venting gas discharge path can be secured. According to the above embodiment, since the space between the unit cooling plates naturally forms part of the venting passage (V), the venting gas can be smoothly discharged without forming a separate opening in the second cooling plate (500).

[0213] In addition, cooling performance can be improved due to the individual arrangement of the unit cooling plates. By spaced-apart from each other, the surface area of ​​each unit cooling plate can be increased, thereby allowing heat dissipation to be more effective. Furthermore, air or venting gas can flow between the unit cooling plates to assist in the cooling effect, thereby increasing the overall cooling performance of the battery pack (1).

[0214] According to the embodiment of the present invention described with reference to FIG. 8, the battery pack (1) can be made lighter through a unit cooling plate structure. By removing unnecessary areas compared to a second cooling plate (500) of a single structure, the total weight of the battery pack (1) can be reduced, which can contribute to increasing energy efficiency in electric vehicles, etc.

[0215] Additionally, the flow path of the venting gas can be defined more clearly. By forming a portion of the venting passage (V) in the spaced-apart space between the unit cooling plates, the venting gas can be discharged in a consistent direction without being dispersed. This allows for effective control of pressure changes within the battery pack (1) and minimizes thermal interference between battery modules (200).

[0216] Furthermore, the unit cooling plate can be positioned in correspondence with the reinforcing material (120), thereby complementing the function of the reinforcing material (120). The reinforcing material (120) serves to complement the structural rigidity of the battery pack (1), and multiple reinforcing materials can be spaced apart. Generally, the reinforcing material (120) can be formed from a metal material and may have high thermal conductivity. In this embodiment, when the unit cooling plate is positioned in correspondence with the reinforcing material (120), an additional heat dissipation effect through the reinforcing material (120) can be expected.

[0217] According to the above embodiment, the second cooling plate (500) is divided into a plurality of unit cooling plates and spaced apart to form a part of the venting passage (V), thereby improving the cooling performance of the battery pack (1), facilitating the discharge of venting gas, and contributing to the lightweighting and safety improvement of the battery pack (1).

[0218] Meanwhile, as described above, the reinforcing material (120) plays a role in supplementing the structural rigidity of the battery pack (1), and can perform the role of improving the durability of the battery pack (1) and increasing resistance to external impact.

[0219] According to the present embodiment, the second cooling plate (500) is formed as a plurality of unit cooling plates and is arranged in correspondence with the reinforcing material (120), thereby improving the rigidity reinforcing function of the reinforcing material (120).

[0220] Specifically, when a unit cooling plate is positioned to be in direct contact or close contact with a reinforcing material (120), external shocks or pressures received by the reinforcing material (120) can be dispersed through the unit cooling plate. Accordingly, the structural stability of the entire battery pack (1) can be increased compared to a structure where the reinforcing material (120) alone absorbs the shock.

[0221] In addition, the unit cooling plate itself can be formed from a material with high rigidity, such as metal, and can form a composite support structure together with the reinforcing material (120). By combining the unit cooling plate with the reinforcing material (120), the deformation resistance of the reinforcing material (120) can be improved, and fatigue failure during long-term use can be reduced.

[0222] In addition, by forming a structure in which the reinforcing material (120) and the unit cooling plate are combined, the phenomenon of localized stress concentration in a specific area of ​​the battery pack (1) is prevented, and uniform rigidity can be maintained throughout the battery pack (1). Through this, deformation of the battery pack (1) can be minimized, and a stable mounting structure can be provided when the battery pack is combined with the frame of a vehicle, such as in an electric vehicle.

[0223] According to the above embodiment, the second cooling plate (500) is formed from a plurality of unit cooling plates and is arranged in correspondence with the reinforcing material (120), thereby further enhancing the rigidity reinforcing function of the reinforcing material (120) and increasing the structural stability of the battery pack (1).

[0224] FIG. 9 is an enlarged cross-sectional view of a battery pack according to another embodiment of the present invention. FIG. 9 may be an enlarged cross-section of part of the BB' cross-section of FIG. 6 or the CC' cross-section of FIG. 8.

[0225] Referring to FIG. 9, the battery pack (1) may include a second cooling plate (500) and a reinforcing member (120), and a sealing member (700) may be disposed between the second cooling plate (500) and the reinforcing member (120). By being disposed between the second cooling plate (500) and the reinforcing member (120), the sealing member (700) can serve to maintain the airtightness of the venting passage (V) and improve the safety and durability of the battery pack (1).

[0226] As described above, the second cooling plate (500) and the reinforcing member (120) can each function as elements that complement the rigidity of the battery pack (1) and define a part of the venting passage (V). In this embodiment, a sealing member (700) may be positioned to seal the space between the second cooling plate (500) and the reinforcing member (120) arranged along the venting passage (V).

[0227] The sealing member (700) can be positioned between the second cooling plate (500) and the reinforcing member (120) and can perform a sealing function to prevent gas inside the venting passage (V) from leaking out. For example, the sealing member (700) can be composed of an elastic material or a sealing material with excellent flame retardancy, and can be flexibly deformed according to changes in the internal pressure of the battery pack (1).

[0228] By placing a sealing member (700), the airtightness of the venting passage (V) can be maintained. The venting gas has high pressure and temperature and must move smoothly along the expected discharge path. By placing the sealing member (700), the venting gas can be discharged along the set path without leaking out of the venting passage (V).

[0229] Furthermore, the structural stability of the battery pack (1) can be improved. The sealing member (700) can compensate for fine gaps that may occur due to impact or vibration, and can increase the bonding strength between the second cooling plate (500) and the reinforcing material (120). Accordingly, the assembly reliability of the battery pack (1) can be increased, and a stable sealed structure can be maintained even in a long-term usage environment.

[0230] The sealing member (700) can prevent the entry of external contaminants (e.g., moisture, dust, etc.) into the battery module (200). In some cases, the battery pack (1) may be used in a harsh environment, and if impurities enter around the venting passage (V), it may cause a decrease in the performance of the battery pack (1). The sealing member (700) can improve the durability of the battery pack (1) by blocking the intrusion of such external contaminants.

[0231] According to the above embodiment, the thermal management performance of the battery pack (1) can be improved. Since a sealed structure is maintained so that the venting gas can flow normally within the venting passage (V), changes in the internal pressure of the battery pack (1) can be effectively controlled, and the internal temperature distribution of the battery pack (1) can be maintained uniformly.

[0232] FIG. 10 is an enlarged cross-sectional view of a battery pack according to another embodiment of the present invention. FIG. 10 may be an enlarged cross-section of part of the BB' cross-section of FIG. 6 or the CC' cross-section of FIG. 8.

[0233] Referring to FIG. 10, the second cooling plate (500) and the reinforcing member (120) can be joined through an uneven structure. The uneven structure can form an interlocking structure to increase the contact area between the second cooling plate (500) and the reinforcing member (120) and to allow the two components to be joined more firmly.

[0234] For example, the uneven structure between the second cooling plate (500) and the reinforcing member (120) can be formed similarly to a rack gear, and protrusions and depressions can be formed on one side of each member. Through this, the second cooling plate (500) and the reinforcing member (120) are not simply joined by surface contact, but can be mechanically interlocked to be more firmly connected.

[0235] In this embodiment, the airtightness of the venting passage (V) can be improved by joining the second cooling plate (500) and the reinforcing material (120) through an uneven structure. By joining the two members by interlocking through the uneven structure, the contact area between the second cooling plate (500) and the reinforcing material (120) increases, and the path through which the venting gas can flow out through the gap can be extended. Accordingly, the venting gas can be smoothly discharged along the expected path, and the venting gas leakage can be prevented.

[0236] Furthermore, the bonding force between the second cooling plate (500) and the reinforcing material (120) can be increased by the uneven structure between the second cooling plate (500) and the reinforcing material (120). As the frictional force between the two members is increased by the uneven structure, separation between the members can be prevented even by external shocks or vibrations. Accordingly, the structural stability of the battery pack (1) can be improved, and the bonded state can be maintained even during long-term use.

[0237] In addition, the uneven structure between the second cooling plate (500) and the reinforcing material (120) ensures sealing and bonding performance between the two components without additional auxiliary materials, thereby reducing the number of parts of the battery pack (1) and making it lighter. Furthermore, the manufacturing process of the battery pack (1) can be simplified, and maintenance of the battery pack (1) can be made easier.

[0238] Furthermore, the rigidity between the second cooling plate (500) and the reinforcing member (120) can be increased by the uneven structure between the second cooling plate (500) and the reinforcing member (120). By combining the two components through the uneven structure, relative deformation between the members can be suppressed, and the durability of the battery pack (1) can be increased. In particular, higher durability can be secured against vibrations and shocks that may occur in the driving environment of the vehicle in which the battery pack (1) is installed.

[0239] According to the above embodiment, the second cooling plate (500) and the reinforcing material (120) are combined through an uneven structure, thereby providing a sealing effect similar to that of the case where the sealing member (700) described with reference to FIG. 9 is placed, while also providing additional advantages such as a reduction in the number of parts, increased structural stability, and improved bonding strength.

[0240] FIG. 11 is an enlarged cross-sectional view of a battery pack according to another embodiment of the present invention. FIG. 11 may be an enlarged cross-section of part of the BB' cross-section of FIG. 6 or the CC' cross-section of FIG. 8.

[0241] Referring to FIG. 11, the battery pack (1) may include a second cooling plate (500) and a reinforcing material (120), and the second cooling plate (500) and the reinforcing material (120) may be fitted together through a specific shape.

[0242] For example, one area of ​​the second cooling plate (500) may be formed as a protrusion in the shape of an inverted trapezoid, and the reinforcing member (120) may be formed as a corresponding indentation in the shape of an inverted trapezoid. Accordingly, the protrusion of the second cooling plate (500) can be fitted into the indentation of the reinforcing member (120), and the two members can be mechanically fitted together.

[0243] By forming a fitting connection structure between the second cooling plate (500) and the reinforcing material (120), the following effects can be expected. The second cooling plate (500) and the reinforcing material (120) can be connected more strongly. According to the fitting connection structure between the second cooling plate (500) and the reinforcing material (120), structural characteristics can be provided that prevent easy detachment after connection, and accordingly, the assembly reliability of the battery pack (1) can be improved.

[0244] In addition, according to the interlocking structure of the second cooling plate (500) and the reinforcing member (120), the contact area between the two spheres is increased, and the sealing effect can be improved. Since venting gas generally has high pressure and temperature, there is a possibility that it may leak to the outside through unnecessary gaps. According to the interlocking structure of the second cooling plate (500) and the reinforcing member (120) of the present embodiment, the contact area is increased by interlocking the two members, and the venting gas outflow path can be extended, thereby suppressing venting gas leakage and allowing the venting gas to be discharged along a set path.

[0245] Furthermore, according to the interlocking structure of the second cooling plate (500) and the reinforcing member (120), the frictional force between the second cooling plate (500) and the reinforcing member (120) is increased, thereby improving structural stability. Since the two members are mechanically interlocked, resistance to external shocks or vibrations can be increased, and the interlocked state can be maintained even after long-term use.

[0246] Furthermore, the interlocking structure of the second cooling plate (500) and the reinforcing member (120) can secure high bonding strength without additional fastening members. Generally, separate bolts, rivets, adhesives, etc., may be used to strengthen the bond between members, but in this embodiment, strong bonding strength can be secured solely by the shape of the second cooling plate (500) and the reinforcing member (120). Accordingly, the manufacturing process of the battery pack (1) can be simplified, and maintenance can be made easier.

[0247] In addition, the battery pack (1) can be made lighter by the interlocking structure of the second cooling plate (500) and the reinforcing material (120). Since no separate fastening member is required, the overall weight of the battery pack (1) can be reduced, and it can contribute to increasing energy efficiency in electric vehicles, etc.

[0248] According to the above embodiment, the protrusion of the second cooling plate (500) and the recess of the reinforcing material (120) are fitted together, thereby improving the sealing effect and structural stability, and the manufacturing process of the battery pack (1) can be simplified and made lighter.

[0249] FIG. 12 is a partial cross-sectional view of a battery pack according to another embodiment of the present invention.

[0250] The battery pack (1) of the embodiment described with reference to FIG. 12 may include the aforementioned configurations in combination with reference to FIG. 5 to FIG. 8.

[0251] Specifically, the battery pack (1) may include a first cooling plate (300), a first pad (400), a second cooling plate (500), and a second pad (600), and these components may be combined with each other while performing their respective functions to maximize the thermal management performance and safety of the battery pack (1).

[0252] The first cooling plate (300) can cool the lower surface (-Z-axis direction) of the battery module (200) and block venting gas to the bottom in the event of a thermal event. The first pad (400), which is positioned correspondingly between the first cooling plate (300) and the battery module (200), includes a fire-resistant material and can complement the blocking function of the first cooling plate (300) by maintaining its physical shape even in the event of a thermal event.

[0253] The second cooling plate (500) cools the upper surface (+Z-axis direction) of the battery module (200), and a cooling plate hole (H') may be formed at a position corresponding to the venting hole (H), or unit cooling plates may be spaced apart to allow the venting gas to be discharged smoothly. The second pad (600) is made of a material with excellent thermal conductivity so that heat transfer to the second cooling plate (500) is smooth under normal conditions, but melts or burns above a certain temperature to open the venting hole, thereby allowing the venting gas to be discharged only when necessary.

[0254] Through such an arrangement structure, the battery pack (1) can be designed to prevent gas leakage to the bottom when a thermal event occurs and to safely vent gas through the top. At the same time, the first cooling plate (300) and the second cooling plate (500) can regulate the temperature of the battery module (200) to prevent the occurrence of a thermal event, and the first pad (400) and the second pad (600) can complement the functions of the first cooling plate (300) and the second cooling plate (500), respectively.

[0255] In this way, the battery pack (1) includes a first cooling plate (300), a second cooling plate (500), a first pad (400), and a second pad (600), thereby enabling simultaneous appropriate blocking and discharge when a thermal event occurs, and maximizing cooling performance and safety.

[0256] Referring to FIG. 12, the battery pack (1) may further include a cover member (800). The cover member (800) may be formed in a structure that surrounds at least a portion of the battery module (200). For example, referring to FIG. 12, the cover member (800) may be positioned to surround the side of the battery module (200).

[0257] The cover member (800) can be arranged in a structure that covers the remaining surfaces of the battery module (200), excluding one side (the side facing the +Z axis direction) and the other side (the side facing the -Z axis direction). Accordingly, a first cooling plate (300) can be placed on the other side (the side facing the -Z axis direction) of the battery module (200), a second cooling plate (500) can be placed on the one side (the side facing the +Z axis direction), and the remaining sides can be covered by the cover member (800).

[0258] The cover member (800) can block the side of the battery module (200) to facilitate smoother venting through one side of the battery module (200) where the venting hole (H) is formed. The cover member (800) can perform the function of guiding the venting gas so that it is discharged through the venting hole (H) without being dispersed to the side of the battery module (200).

[0259] Additionally, the cover member (800) may include a self-extinguishing material. The self-extinguishing material has the characteristic of suppressing combustion on its own without external extinguishing action when a fire occurs, and can play a role in improving the safety of the battery pack (1). The cover member (800) may include a self-extinguishing material such as a flame-retardant polymer, expandable graphite, or ceramic composite material, and can prevent flame spread and perform a protective role for the battery pack (1) when a thermal event occurs.

[0260] By including a cover member (800), the venting gas discharge of the battery module (200) can be made smoother. Specifically, by blocking the side where the venting hole (H) is not formed by the cover member (800), the venting gas can be discharged more stably along a set path.

[0261] And the risk of fire spread of the battery pack (1) can be reduced. The cover member (800) can be made of a self-extinguishing material so that, in the event of a thermal event, flames generated in the battery module (200) can be prevented from spreading to adjacent modules.

[0262] In addition, the structural protection function of the battery pack (1) can be improved. The cover member (800) can protect the side of the battery module (200) from external impacts or contaminants, and can improve the durability of the battery pack (1).

[0263] According to the above embodiment, the cover member (800) is positioned to surround the side of the battery module (200), thereby facilitating the discharge of venting gas and increasing the fire safety of the battery pack (1) by utilizing self-extinguishing properties, and performing an external protection function.

[0264] Meanwhile, the battery pack (1) may further include a busbar frame (not shown). The cover member (800) may be configured to protect the busbar frame.

[0265] The battery module (200) may consist of a plurality of battery cells (210), and the electrodes of each battery cell (210) may be electrically connected through a busbar frame. The busbar frame functions as an electrical connection that efficiently transmits current between battery cells (210) and may generally be made of a highly conductive metal (e.g., copper or aluminum).

[0266] In this embodiment, the cover member (800) may be configured to wrap around the side of the battery module (200) while simultaneously protecting the busbar frame. The busbar frame may be positioned on the top or side of the battery module (200) and needs to be protected from the external environment.

[0267] By configuring the cover member (800) to protect the busbar frame, the electrical connection portion of the busbar frame can be prevented from being exposed to the outside. If the busbar frame is exposed to the outside, dust, moisture, and foreign substances may penetrate, causing electrical connection failure or corrosion. The cover member (800) protects the busbar frame from these external elements, thereby improving the reliability of the battery pack (1).

[0268] And the cover member (800) can protect the busbar frame from external impact. The battery pack (1) can be used in various environments such as a vehicle, and there is a possibility that the busbar frame may be damaged by external impact or vibration. The cover member (800) can provide a protective structure to increase the mechanical stability of the busbar frame.

[0269] Furthermore, the cover member (800) can reduce the risk of a short circuit in the busbar frame. If the busbar frame connected to the battery cell (210) comes into contact with an external metal object, a short circuit may occur, which can cause serious damage to the battery pack (1). The cover member (800) may have electrical insulation properties, thereby preventing contact with an external conductive material.

[0270] Additionally, if the cover member (800) includes a self-extinguishing material, the busbar frame protection function can be further enhanced. By preventing flames from spreading to the busbar frame in the event of a thermal event, the safety of the battery pack (1) can be improved.

[0271] According to the above embodiment, the cover member (800) is configured to protect the busbar frame while wrapping around the side of the battery module (200), thereby simultaneously improving electrical reliability and mechanical stability and increasing the durability of the battery pack (1).

[0272] FIG. 13 is an exploded perspective view of a battery pack according to another embodiment of the present invention.

[0273] As described above with reference to other drawings, the battery module (200) may not include a module case (220). Specifically, the battery cell (210) may not be placed in the internal space of the module case (220) but may be directly accommodated in the module receiving space inside the pack case (100). The battery pack (1) may include the battery cell (210) but not include a module case (220), and the components of the battery pack (1), such as the pack case (100) and pack body (110), may be configured to perform the function of a module case.

[0274] A battery pack (1) of this type can be called a Cell-to-Pack (CTP) because the battery cells (210) are directly housed in the pack case (100) without a module case. The technical concept of the present invention can also be applied to a battery pack (1) of the CTP type.

[0275] In an embodiment of the cell-to-pack type, the overall volume of the battery pack (1) can be reduced, and more battery cells (210) can be accommodated within a pack case (100) of the same size. Accordingly, the energy density of the battery pack (1) can be improved.

[0276] In addition, the number of components of the battery pack (1) can be reduced, which can simplify the manufacturing process and thus reduce costs.

[0277] In addition, the heat transfer path between the battery cell (210) and the external cooling system can be shortened. Accordingly, the heat dissipation efficiency of the battery pack (1) can be increased, and the cooling performance can be improved.

[0278] In addition, since the venting gas generated from the battery cell (210) can pass through the discharge area and be directly discharged into the venting passage (V) of the pack case (100), the gas discharge speed can be improved. Through this, the rise in internal pressure can be suppressed more quickly, and the safety of the battery pack (1) can be increased.

[0279] The technical concept of the present invention is not limited to the structure of a specific battery module (200), and can encompass not only a structure including a module case (220) but also a Cell-to-Pack (CTP) structure in which a battery cell (210) is directly housed in a pack case (100).

[0280] FIG. 14 is a drawing for explaining a battery pack according to one embodiment of the present invention and a vehicle including the same.

[0281] Referring to FIG. 14, the vehicle (1000) may include one or more battery packs (1). For example, the vehicle (1000) may be any one of an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle, but is not limited thereto. The vehicle (1000) may be any one of a four-wheeled vehicle or a two-wheeled vehicle. The vehicle (1000) may operate by receiving power from a battery pack (1) or a battery module according to embodiments of the present invention.

[0282] Some or other embodiments of the present disclosure described above are not exclusive or distinct from one another. Some or other embodiments of the present disclosure described above may be used in combination or combined for their respective configurations or functions.

[0283] For example, this means that configuration A described in a specific embodiment and / or drawing and configuration B described in another embodiment and / or drawing can be combined. That is, even if the combination between configurations is not directly described, it means that combination is possible, except in cases where it is described that combination is impossible.

[0284] The foregoing detailed description should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the invention shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

Claims

1. A pack case comprising a module receiving space for accommodating a battery module, a pack body surrounding the module receiving space, and a reinforcing material disposed on the inner side of the pack body; and A battery module having multiple battery cells; Includes, A battery pack in which the space enclosed by the reinforcing material and at least a part of the pack body defines at least a part of a venting passage configured to allow venting gas discharged from the battery module to be discharged to the outside.

2. In Paragraph 1, The above reinforcing material is a battery pack consisting of a frame formed by extending in a predetermined direction.

3. In Paragraph 1, The above reinforcing material is provided in multiple numbers and spaced apart, A battery pack in which at least a portion of the above-mentioned venting passage is defined as a space surrounded by at least two of the above-mentioned reinforcing materials and at least a portion of the above-mentioned pack body.

4. In Paragraph 1, The battery module is a battery pack that defines at least a portion of the venting passage together with the reinforcing material and the pack body.

5. In Paragraph 1, The battery module above is a battery pack comprising a venting hole configured to discharge venting gas generated from the battery cell into the venting passage.

6. In Paragraph 5, The above venting hole is formed on one side of the battery module, and A first cooling plate arranged to cool the other side of the battery module; A battery pack including more.

7. In Paragraph 6, A first pad disposed between the first cooling plate and the battery module and comprising a refractory material; A battery pack that includes more.

8. In Paragraph 5, The above venting hole is formed on one side of the battery module, and A second cooling plate arranged to cool the above-mentioned surface; A battery pack including more.

9. In Paragraph 8, At least a portion of the second cooling plate above is, A battery pack configured to define at least a portion of the above-mentioned venting passage.

10. In Paragraph 8, The above second cooling plate is a battery pack comprising a cooling plate hole formed to allow venting gas to flow into the venting passage.

11. In Paragraph 8, A second pad disposed between the second cooling plate and the battery module and comprising a thermally conductive material; A battery pack that includes more.

12. In Paragraph 11, The above second pad is a battery pack configured to cover the above one surface.

13. In Paragraph 8, The second cooling plate above includes a plurality of spaced-apart unit cooling plates, and At least a portion of the above venting passage is a battery pack disposed between the spaced-apart unit cooling plates.

14. In Paragraph 1, The battery module includes a venting hole configured to discharge venting gas generated from the battery cell into the venting passage, and The above venting hole is formed on one side of the battery module, and A first cooling plate arranged to cool the other side of the battery module, which is the opposite side of the above-mentioned one side; A second cooling plate arranged to cool the above-mentioned surface; and A cover member surrounding at least a portion of the battery module and having self-extinguishing properties; A battery pack that includes more.

15. An automobile comprising a battery pack according to any one of paragraphs 1 through 14.

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