Battery module, battery pack and vehicle including same

Abstract

A battery module according to an embodiment of the present disclosure may include: a module case having an internal space and including a module bottom plate in which a vent hole for discharging gas is formed; a plurality of battery cells disposed in the internal space of the module case, each of the plurality of battery cells having a venting region in a lower portion thereof so as to discharge internal gas downward, and having a support region in at least a portion of a region other than the venting region in the lower portion; and one or more lower pads disposed between the module bottom plate and the plurality of battery cells to support the support region.

Description

Battery module, battery pack including the same, and automobile

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

[0002] This application is a priority application for Korean Patent Application No. 10-2024-0136937 filed on October 8, 2024 and Korean Patent Application No. 10-2025-0070594 filed on May 29, 2025, and all contents disclosed in the specifications and drawings of said applications are incorporated into this application by reference.

[0003] 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.

[0004] 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.

[0005] 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 battery module or pack can be varied depending on the required output voltage or charge / discharge capacity.

[0006] The present invention provides a battery module capable of discharging high-temperature gas or flames caused by thermal events in battery cells within the upper battery module downward while also ensuring stability, a battery pack including the same, and an automobile.

[0007] 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.

[0008] A battery module according to one embodiment of the present invention may include a module case having a module bottom plate having a space formed inside and a venting hole formed for discharging gas, a plurality of battery cells disposed in the space inside the module case and having a venting area at the bottom capable of discharging internal gas in a downward direction, and a support area provided in at least a part of the area excluding the venting area at the bottom, and one or more lower pads disposed between the module bottom plate and the plurality of battery cells to support the support area.

[0009] A plurality of venting holes are formed in the lower plate of the module, a plurality of battery cells are provided, and at least some of the venting areas of the plurality of battery cells may be positioned opposite to the venting holes.

[0010] The above module case may further include a module top plate and may further include an upper pad disposed between the module top plate and the plurality of battery cells to secure the plurality of battery cells.

[0011] A battery module, wherein the battery cell comprises a cell outer material having a storage portion for housing an electrode assembly and a sealing portion for sealing the storage portion, and at least a portion of the sealing portion is disposed in a region corresponding to the venting area.

[0012] The sealing portion may be folded at least partially and positioned in an area corresponding to the venting area.

[0013] The sealing portion disposed in the area corresponding to the venting area can be folded at least a portion thereof.

[0014] Meanwhile, one of the lower pads of the battery module includes a plurality of protrusions formed in an upward direction, and at least some of the support areas of the plurality of battery cells can be supported by the protrusions.

[0015] At least some of the above plurality of protrusions may have elasticity.

[0016] At least some of the above plurality of protrusions may include a curved surface that is convex toward the upper side.

[0017] An air layer may be formed between at least some of the plurality of protrusions and the lower plate of the module.

[0018] The lower pad may further include an incision formed by cutting at least one side.

[0019] The above-mentioned incision may be formed by cutting both sides of the above-mentioned protrusion.

[0020] A plurality of pad holes may be formed in the lower pad above.

[0021] Among the plurality of pad holes, the pad hole formed at the position corresponding to the venting area may be formed larger than the size of the pad hole formed at the position corresponding to the support area.

[0022] At least one of the plurality of protrusions can support the support area of ​​two adjacent battery cells.

[0023] A battery pack according to one embodiment of the present invention may include the battery module and a pack case capable of storing a plurality of the battery modules in an internal space.

[0024] The above pack case may be disposed at the bottom of the plurality of battery modules and may include a venting passage for discharging gas discharged from the venting hole to the outside.

[0025] An automobile according to one embodiment of the present invention may include the battery module or battery pack.

[0026] A battery module according to various embodiments of the present invention, a battery pack including the same, and a vehicle can stably discharge high-temperature gas or flames caused by thermal events in a battery cell inside the battery module downward.

[0027] In addition, a battery module according to various embodiments of the present invention, a battery pack including the same, and a vehicle can prevent or suppress rupture that may occur at the lower side of a battery cell inside the battery module.

[0028] In addition, a battery module according to various embodiments of the present invention, a battery pack including the same, and a vehicle can efficiently utilize the space occupied by battery cells inside the battery module.

[0029] In addition, a battery module according to various embodiments of the present invention, a battery pack including the same, and a vehicle can improve the cooling performance of battery cells.

[0030] 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.

[0031] The following drawings attached to this specification illustrate some 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.

[0032] FIG. 1 is a perspective view of a battery module according to one embodiment of the present invention.

[0033] FIG. 2 is an exploded perspective view of a battery module according to one embodiment of the present invention.

[0034] FIG. 3 is a cross-sectional view of a battery module according to one embodiment of the present invention.

[0035] FIG. 4 is a schematic perspective view illustrating a battery cell of a battery module according to one embodiment of the present invention.

[0036] FIG. 5 is a cross-sectional view of a battery module including a battery cell according to one embodiment of the present invention.

[0037] FIG. 6 is a perspective view illustrating a battery module according to another embodiment of the present invention.

[0038] FIG. 7 is a perspective view illustrating a lower pad of a battery pack according to another embodiment of the present invention.

[0039] FIG. 8 is a cross-sectional view illustrating a lower pad according to another embodiment of the present invention.

[0040] FIG. 9 is a perspective view illustrating a battery module according to another embodiment of the present invention.

[0041] FIG. 10 is a cross-sectional view illustrating a lower pad and a module bottom plate according to another embodiment of the present invention.

[0042] FIG. 11 is a perspective view illustrating a battery module according to another embodiment of the present invention.

[0043] FIG. 12 is a cross-sectional view illustrating a lower pad and a module bottom plate according to another embodiment of the present invention.

[0044] FIG. 13 is a cross-sectional perspective view of a battery module according to another embodiment of the present invention.

[0045] FIG. 14 is a cross-sectional view of a battery module according to another embodiment of the present invention.

[0046] FIG. 15 is an exploded perspective view for illustrating a battery pack including a battery module according to embodiments of the present invention.

[0047] FIG. 16 is a schematic exploded perspective view of a battery pack according to another embodiment of the present invention.

[0048] FIG. 17 is a cross-sectional view illustrating a battery pack including a battery module according to embodiments of the present invention.

[0049] FIG. 18 is a drawing for explaining a vehicle including a battery pack according to one embodiment of the present invention.

[0050] In parts of the attached drawings, corresponding components are given the same reference numerals. Those skilled in the art understand that the drawings are intended to illustrate elements simply and clearly and are not necessarily drawn to scale. Additionally, elements of known technology that are useful or essential in commercially viable embodiments may often be omitted so as not to hinder the spirit of the various embodiments of the present invention.

[0051] Hereinafter, some embodiments of the present invention will be described 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.

[0052] Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are merely some embodiments of the present invention and do not represent all of the technical ideas of the present invention, and that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0053] 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.

[0054] 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.

[0055] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0056] 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.

[0057] 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.

[0058] Throughout the specification, when "A and / or B" is used, it may mean A, B, or A and B unless specifically stated otherwise.

[0059] 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.

[0060] 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 any 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 situation extremely dangerous.

[0061] 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 may lead to structural collapse or fire.

[0062] 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.

[0063] The present invention provides a battery module capable of discharging high-temperature gas or flames caused by a thermal event in a battery cell downward while also ensuring stability, a battery pack including the same, and an automobile.

[0064] Hereinafter, a battery module according to embodiments of the present invention, a battery pack including the same, and an automobile will be described with reference to FIGS. 1 to 14.

[0065] FIG. 1 is a perspective view of a battery module according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a battery module according to one embodiment of the present invention.

[0066] Referring to FIGS. 1 and 2, the battery module (100) may include a module case (110), a plurality of battery cells (120), and one or more lower pads (130).

[0067] In this specification, unless otherwise specified, the X-axis direction is referred to as the left-right direction, the Y-axis direction orthogonal to the X-axis direction as the front-back direction, and the Z-axis direction orthogonal to the XY plane as the up-down direction (vertical direction).

[0068] A space may be formed inside the module case (110). The module case (110) may include a module bottom plate (111) having a venting hole (112) formed therein to discharge gas.

[0069] A plurality of battery cells (120) can be accommodated in the internal space of the module case (110). According to one embodiment, the material of the module case (110) may include metal and / or plastic. The module case (110) included in the present invention is not limited to a specific material, shape, or method of connection.

[0070] The module case (110) may additionally include other components in addition to the module bottom plate. For example, the module case may include several additional plate materials in addition to the module bottom plate. At least some of the plurality of plates included in the module case (110) may be a single unit. The components of the module case (110) may be joined by means such as welding or bolting. The configuration, material, shape, and joining method of the module case (110) are not limited to those described above.

[0071] One or more venting holes (112) may be formed in the module bottom plate (111). The venting holes (112) may be formed to penetrate the module bottom plate (111) in an upward and downward direction. The inside and outside of the module case (110) may be connected through the venting holes (112). The venting holes (112) may serve as outlets for discharging gas generated from the battery cells (120) inside the battery module (100) to the outside of the battery module (100).

[0072] A battery cell (120) can be housed in the internal space of a module case (110). Here, the battery cell (120) may refer to a single secondary battery or a battery group comprising multiple secondary batteries. Each battery cell (120) may include an electrode assembly, an electrolyte, and a battery case. The shape of the battery case is not limited. For example, depending on the shape of the battery case, the battery cell (120) may be classified into a pouch-type cell, a cylindrical-type cell, a prismatic-type cell, etc. Since the type, shape, structure, etc. of the battery cell (120) are widely known at the time of filing the present invention, a detailed description is omitted. The present invention may be applied to various types of secondary batteries known at the time of filing the present invention. For example, the battery cell (120) may be a lithium secondary battery, but may also be a secondary battery of another type.

[0073] Each battery cell (120) may include electrode terminals. The electrode terminals may include a positive lead and a negative lead. The positive lead and the negative lead may protrude from the battery cell (120). A plurality of battery cells (120) may be electrically connected to each other in series or in parallel through the electrode terminals. The battery module (100) may further include a busbar, etc., to facilitate connection between the electrode terminals of a plurality of battery cells (120) or to detect electrical signals from the electrode terminals.

[0074] A plurality of battery cells (120) may be arranged in the internal space of the module case (110). In the internal space of the module case (110), a plurality of battery cells (120) may be configured to be stacked together in at least one direction. For example, a plurality of battery cells (120) may be stacked in a horizontal direction or in a left-right direction (X-axis direction), as shown in FIG. 2. Additionally, a plurality of battery cells (120) provided in the module case (110) may be electrically connected to each other in series and / or parallel.

[0075] A battery cell (120) placed in the internal space of a module case (110) may be provided with a 'venting area' at the bottom. Additionally, the battery cell (120) may be provided with a 'support area' at the bottom. Here, the 'support area' may be provided in at least a portion of the area at the bottom of the battery cell excluding the venting area.

[0076] A lower pad (130) may be positioned between the module bottom plate (111) and a plurality of battery cells (120). The lower pad (130) may be positioned above the module bottom plate (111) and below the battery cell (120) to support the battery cell (120). For example, the lower pad (130) may be configured to support a support area provided below the battery cell (120).

[0077] The lower pads (130) may be provided in the required number. Alternatively, the lower pads (130) may be provided in multiple numbers. For example, the lower pads (130) may be provided in the same number as the battery cells (120). In this case, each lower pad (130) may support a different battery cell (120). Alternatively, the lower pads (130) may be provided in a different number than the battery cells (120). For example, one lower pad (130) may be configured to support two or more battery cells (120).

[0078] Below, the venting area, support area, lower pad (130), and upper pad (140) of the battery cell (120) will be described with reference to FIG. 3.

[0079] FIG. 3 is a cross-sectional view of a battery module according to one embodiment of the present invention.

[0080] FIG. 3 is a partial cross-sectional view of a battery module (100) taken by cutting along the A-A' cutting line of FIG. 1. FIG. 3 is illustrated with two battery cells (120) as the center for convenience, but this embodiment can be applied to multiple battery cells (120) of the battery module (100) and their surrounding components.

[0081] A venting area may be provided at the bottom of each battery cell (120), as indicated by the part marked V. This venting area (V) may be a part through which gas inside the battery cell (120) is discharged to the outside. The venting area (V) may form an outlet through which flames, gas, sparks, etc. are discharged in the event of a thermal event occurring in the battery cell (120).

[0082] The venting area (V) may be configured to facilitate the discharge of gas generated inside the battery cell (120). For example, the venting area (V) may include, but is not limited to, a discharge hole or a preliminary break line.

[0083] The venting area (V) is an area that is opened to discharge high-temperature gas when high-temperature gas is generated inside the battery cell (120), so it may be sealed relatively weakly compared to other areas of the battery cell (120). The venting area (V) may be a part in which a venting structure is provided to facilitate venting through that part. The venting area (V) may also refer to a space provided by other components (not shown) within the battery cell (120) so that the gas discharged from the battery cell (120) cannot move to other parts and can only move to and be discharged from a specific part of the battery cell (120).

[0084] A portion of the lower part of the battery cell (120) supported by the lower pad (130) may be referred to as a support portion (S). The support portion (S) may be provided in at least a portion of the portion excluding the venting portion (V) of the lower part of the battery cell (120). For example, referring to FIG. 3, a portion of the lower part of the battery cell (120) may be a venting portion (V), and a portion excluding the venting portion (V) of the lower part of the battery cell (120) may be a support portion (S).

[0085] A venting area (V) may be provided at the bottom of the battery cell (120) to allow internal gas to be discharged in a downward direction (-Z-axis direction). Alternatively, this venting area (V) may be configured so that the venting direction is directed downward.

[0086] If a thermal event occurs in at least some of the battery cells (120), high-temperature gas or flames can be discharged to the bottom of the battery module (100) through the venting hole (112).

[0087] A battery module (100) can be placed in a vehicle (not shown) to supply power to other parts of the vehicle. According to the present embodiment, the battery module (100) can be placed in the lower part of the vehicle, and the venting area (V) and / or venting hole (112) can be placed so as to face the lower direction of the vehicle. The lower direction of the vehicle may mean the direction toward the ground. At this time, other components of the vehicle may be placed on the upper side (+Z direction) of the battery module (100). For example, when the battery module (100) is placed in the vehicle, the module bottom plate (111) of the battery module (100) may face the lower side of the vehicle (e.g., the ground), and the module top plate (113) of the battery module (100) may face the interior of the vehicle.

[0088] According to the above embodiment, when a thermal event occurs in one or more battery cells (120), high-temperature gas or flames can be discharged toward the ground towards the lower side of the vehicle (downward venting). Therefore, the impact on other components of the vehicle is suppressed, the possibility of fire spreading to the entire vehicle is suppressed, and the possibility of causing harm to the occupants of the vehicle is also suppressed. Furthermore, according to the above embodiment, since there are no or fewer components that would obstruct venting on the lower side of the battery module (100) compared to the upper side of the battery module (100), smooth venting can be achieved.

[0089] The lower pad (130) may be positioned between the module bottom plate (111) and the battery cell (120) to support the support area (S) in the upward direction (+Z-axis direction). The lower pad (130) may include a flexible, elastic, or soft material. Additionally, the lower pad (130) may include an electrically insulating material. For example, the lower pad may include a material such as rubber, silicone, or polymer.

[0090] The lower support area (S) of the battery cell (120) is supported by the lower pad (130), thereby allowing pressure to be relieved due to vertical force. According to the above embodiment, by relieving the vertical force applied to the support area (S), the pressure applied to the entire lower area of ​​the battery cell (120) can be relieved, and the possibility of a problem occurring where a substance such as an electrolyte leaks out of the battery cell (120) can be suppressed.

[0091] Referring to FIG. 3, one lower pad (130) can support two adjacent battery cells (120). For example, two battery cells (120) are arranged so that their respective support areas (S) are adjacent to each other, and one lower pad (130) can support two adjacent support areas (S).

[0092] In the lower part of the battery cell (120), a substance such as an electrolyte may accumulate due to gravity and be pressurized due to the load of the battery cell (120). For example, if the pressure applied to the substance such as the electrolyte at a fixed location of the battery cell (120) becomes excessively large, at least one region of the lower part of the battery cell (120) may rupture, and a problem may occur in which the substance such as the electrolyte leaks out of the battery cell (120).

[0093] According to embodiments of the present invention, the lower pad (130) can relieve pressure applied to the lower support area (S) of the battery cell (120) by the load of the battery cell (120), and can suppress the possibility of a problem occurring in which the lower part of the battery cell (120) ruptures and a substance such as an electrolyte leaks out of the battery cell (120).

[0094] And according to embodiments of the present invention, the lower pad (130) does not block the space between the venting area (V) and the venting hole (112), so it can stably support the support area (S) without hindering the discharge of venting gas from the venting area (V).

[0095] The isolation pad (150) can partition the internal space of the module case (110). The isolation pad (150) can isolate multiple battery cells (120). Additionally, the isolation pad (150) can support multiple battery cells (120) laterally so that they do not fall over. The isolation pad (150) may include a flexible, elastic, and soft material. The isolation pad (150) may include a fire-resistant material and / or a heat-resistant material. Multiple isolation pads (150) may be provided, and the number is not limited. The ratio of the number of isolation pads (150) to the number of battery cells (120) can be appropriately designed according to the required energy density, etc. For example, one isolation pad (150) may be provided for every two battery cells (120). As another example, one isolation pad (150) may be provided for every three or four battery cells (120).

[0096] The isolation pad (150) can suppress the effect of a thermal event occurring in one battery cell (120) on another battery cell (120). The isolation pad (150) not only serves to support the battery cell (120), but also serves to guide the gas to move toward the venting hole (112) rather than toward another battery cell (120) when a thermal event occurs in the battery cell (120) and venting gas is discharged.

[0097] Referring to FIGS. 1 and 2, a plurality of venting holes (112) may be formed in the module bottom plate (111) of the battery module (100). For example, a plurality of venting holes may be formed in the front-rear direction and / or left-right direction on the module bottom plate.

[0098] Also, a plurality of battery cells (120) may be provided. For example, as shown in FIG. 2, a plurality of battery cells included in one battery module may be stacked in the left-right direction.

[0099] At this time, at least some of the venting areas (V) of the plurality of battery cells (120) may be positioned opposite the venting hole (112).

[0100] For example, the venting area (V) provided in each battery cell (120) may have a venting hole (112) facing downwards as shown in FIG. 3. Alternatively, the venting area (V) of all battery cells (120) included in the cell stack may have at least one venting hole (112) facing downwards. The venting area (V) may not receive vertical force due to the venting hole (112). According to the above embodiment, the vertical force applied to the venting area (V) of the battery cell (120) can be eliminated, thereby reducing the pressure applied to the entire lower area of ​​the battery cell (120) and suppressing the possibility of a problem occurring where a substance such as an electrolyte leaks out of the battery cell (120).

[0101] According to an embodiment in which one area of ​​the lower part of the battery cell (120) is a support area (S) and the remaining area is a venting area (V), the vertical force applied to the venting area (V) of the lower part of the battery cell (120) is eliminated and the vertical force applied to the support area (S) is mitigated, thereby minimizing the pressure applied to the entire lower part of the battery cell (120) and suppressing the possibility of a problem occurring in which a substance such as an electrolyte leaks out of the battery cell (120).

[0102] Referring to FIGS. 2 and 3, the battery module (100) according to the present invention may further include a module top plate (113). The module top plate (113) is a component included in the module case (110) and may be placed on top of a plurality of battery cells (120). Other components may be placed between the module top plate (113) and the battery cells (120).

[0103] The battery module (100) according to the present invention may further include an upper pad (140). The upper pad (140) may be placed between the module top plate (113) and a plurality of battery cells (120). The upper pad (140) may be placed below the module top plate (113) and above the battery cells (120). For example, the upper pad (140) may be configured in the form of a rectangular sheet and interposed between the module top plate (113) and the battery cells (120) while lying horizontally.

[0104] The upper pad (140) can secure one or more battery cells (120). Additionally, a single upper pad (140) can secure multiple battery cells (120). The upper pad (140) may be configured to fill the space between the module top plate (113) and the battery cells (120) to suppress the flow of the battery cells (120) in the lower space of the upper pad (140). For example, the upper pad (140) may be formed in the form of an adhesive resin. In this case, the upper pad (140) can adhesively secure the top of the battery cells (120) and the module top plate (113) to each other. The upper pad (140) can press the top of the battery cells (120) in a downward direction (-Z-axis direction). In this case, the upper pad (140) can support the battery cell (120) so that it is stably fixed inside the module case (110) together with the lower pad (130). Additionally, the upper pad (140) may include an elastic material. At this time, the upper pad (140) may be interposed between the module top plate (113) and the battery cell (120) in a compressed state. In this case, the effect of pressing the battery cell (120) and fixing the battery cell (120) by the upper pad (140) can be enhanced.

[0105] Referring to FIG. 3, the lower side of the upper pad (140) is pressed by the battery cell (120), so that a groove may be formed in a recess corresponding to the upper shape of the battery cell (120). The groove formed according to the upper shape can stably support the battery cell (120) so that it does not move in the lateral direction (X-axis direction).

[0106] The upper pad (140) may include a heat-resistant material. For example, the upper pad (140) may include, but is not limited to, glass fiber, polystyrene, polyurethane, cellulose, vacuum panel, aerogel, perlite, Gork, polyisocyanurate, etc. as a heat-resistant material.

[0107] According to the above embodiment, the upper pad (140) containing a heat-resistant material supports one or more battery cells (120) and can simultaneously suppress heat generated from the battery cells (120) from being transferred upward (+Z direction) through the module top plate (113) of the battery module (100). For example, when the battery module (100) is placed at the bottom of the vehicle and other components of the vehicle are placed above the battery module (100), the upper pad (140) containing a heat-resistant material can suppress heat generated from the battery cells (120) and transferred to other components near the battery module (10) of the vehicle.

[0108] FIG. 4 is a schematic perspective view illustrating a battery cell of a battery module according to one embodiment of the present invention.

[0109] The battery cell (120) of the embodiment described with reference to FIG. 4 may also be applied to the embodiment described above with reference to FIG. 1 to 3. Referring to FIG. 4, the battery cell (120) may be a pouch-type battery. The battery cell (120) may include a storage portion (122) and a sealing portion (123) as a cell outer material (121). The cell outer material (121) may also be referred to as a battery case.

[0110] The storage portion (122) may be a part of the cell outer material (121) that stores an electrode assembly inside. An electrolyte may also be stored in the internal space of this storage portion. The sealing portion may be a part of the cell outer material (121) located at the edge of the storage portion (122) that seals the storage portion.

[0111] The storage portion (122) may have an overall rectangular shape. The sealing portion (123) is a region of the cell outer material (121) that surrounds the storage portion (122), and the storage portion (122) can be sealed by the polymer material of the cell outer material being fused together.

[0112] For example, a battery cell in which the sealing portion (123) is formed on four sides (corners) of the storage portion (122) may be referred to as a four-sided sealing cell, and a battery cell in which the sealing portion (123) is formed on three sides (corners) of the storage portion (122) may be referred to as a three-sided sealing cell. The battery cell (120) of FIG. 4 is illustrated in the form of a three-sided sealing cell in which the sealing portion (123) is formed on three sides of the storage portion (122). Furthermore, the present invention may be provided with sealing portions (123) on the front, rear, and bottom as a three-sided sealing cell. According to this embodiment, gas can be induced to be discharged through the area where the sealing portion (123) is placed, and it is advantageous for gas discharge through the sealing portion (123) placed on the bottom.

[0113] The shape of the lower side sealing portion (123) of the battery cell (120) according to the present embodiment and the arrangement of the battery cell (120) will be explained below with reference to FIG. 5.

[0114] FIG. 5 is an enlarged cross-sectional view of a portion of a battery module according to an embodiment of the present invention. The description of other components of the battery module (100), excluding the battery cell (120) of FIG. 5, may be made by referring to FIG. 1 to FIG. 3 for the description of the components described above.

[0115] The cross-section of the battery cell (120) in the configuration shown in FIG. 5 is a cross-section of the battery cell (120) of FIG. 4 taken by cutting along the BB' cutting line. In this specification, the configurations of the battery cell (120), such as the electrode assembly and electrolyte, may be omitted or schematically shown for convenience.

[0116] Although FIG. 5 is illustrated with one battery cell (120) as the center for convenience, this embodiment can be applied to a plurality of battery cells (120) of a battery module (100) and their surrounding components.

[0117] As illustrated in FIG. 5, at least a portion of the sealing portion (123) may be placed in an area corresponding to the venting area (V) of the battery cell (120). Since the venting area (V) is an area that is opened to discharge high-temperature gas when high-temperature gas is generated inside the battery cell (120), the sealing portion (123) in the area placed in the venting area (V) may be sealed relatively weakly compared to the sealing portion (123) in other areas.

[0118] When a thermal event occurs in the battery cell (120) and venting gas is generated internally, the internal gas of the battery cell (120) can be discharged toward the sealing portion located at the bottom. Additionally, in the case of a three-sided sealing cell, the sealing strength of the side where the sealing portion (123) is formed may be weaker than the sealing strength of the side where the sealing portion (123) is not formed. At this time, since the sealing portion (123) is not located on the upper side but is provided on the lower side where gravity is applied, the internal gas of the battery cell (120) can be discharged through the lower side sealing portion (123). Furthermore, since the upper direction of the battery cell is blocked by the upper pad (140) and the module top plate (113), and the side is blocked by another battery cell (120) or a side plate, the venting gas can be discharged toward the venting area (V) in the lower direction.

[0119] As illustrated in FIG. 5, when a venting hole (112) is positioned on the lower side of the venting area (V), the venting area (V) is not subjected to a vertical force, so the possibility of venting gas being discharged through the sealing portion (123) of the area positioned in the venting area (V) may be increased. Also, if the battery cell (120) is a three-sided sealing cell, at least a portion of the sealing portion (123) may be positioned in an area corresponding to the venting area (V), and the possibility of venting gas being discharged into the venting area (V) may be increased.

[0120] According to this embodiment of the present invention, when venting gas is generated inside a battery cell (120) where a thermal event has occurred, the venting gas can be moved downward and discharged into a venting hole (112) through a sealing portion (123) of a venting area (V).

[0121] At least some of the sealing portions (123) of the battery cell (120) can be folded to secure space. For example, in the embodiment of FIG. 4, the sealing portion (123) on the lower side where the electrode terminal (124) is not located in the battery cell (120) can be folded toward the storage portion (122).

[0122] Folding the sealing portion (123) means that a part of the sealing portion (123) is folded or rolled up. For example, as shown in FIGS. 4 and 5, the sealing portion (123) may be folded at least partially and placed in an area corresponding to the venting area (V). The sealing portion (123) may be folded in an area that seals the lower side (corner) portion of the storage portion.

[0123] According to the above embodiment, since the sealing portion (123) is folded, it can occupy less space compared to the case where it is not folded, thus allowing the internal space of the battery module (100) to be utilized more efficiently. In addition, when the sealing portion (123) that seals the lower side of the storage portion is folded, the center of gravity of each battery cell (120) can be moved further down, and the center of gravity of the entire battery module (100) can also be moved downward, allowing the battery module (100) to be placed more stably in a vehicle or the like where it is used, and the center of gravity of the vehicle is lowered, which can help with the stable movement of the vehicle.

[0124] According to the above embodiment, the folded portion of the sealing portion (123) is placed in the venting area (V) so that it is not pressed by the lower pad (130), thereby improving the sealing durability of the sealing portion (123). In addition, since the lower side of the venting area (V) is an empty space for venting, the space can be utilized efficiently by placing the folded portion of the sealing portion (123) in that space.

[0125] FIG. 6 is a perspective view illustrating a battery cell and a lower pad according to another embodiment of the present invention. FIG. 7 is a perspective view of a lower pad of a battery module according to another embodiment of the present invention viewed from above. FIG. 8 is a cross-sectional view illustrating a cross- section of a battery cell and a lower pad according to another embodiment of the present invention.

[0126] FIG. 6 illustrates a battery cell (120) and a lower pad (130) in a state excluding other components of the battery module (100). FIG. 6 illustrates the lower side of the battery cell (120) and the lower pad (130). The battery module (100) may include components identical or similar to the battery module (100) described above with reference to other drawings.

[0127] As described above, the number of lower pads (130) and battery cells (120) may vary, and multiple battery cells (120) may be supported by one lower pad (130).

[0128] The lower pad (130) may include a protrusion (131), a flat portion (132), and a pad hole (133). For example, a single lower pad (130) may include a plurality of protrusions (131) formed in the upward direction (+Z-axis direction). Since FIG. 6 is a drawing of the lower pad (130) viewed from below, the area where the protrusion (131) is placed on the lower surface of the lower pad (130) is shown as being concave upward. However, this is merely an example, and the lower surface of the lower pad (130) may be flat rather than concave, and the protrusion (131) may be formed in a form where only the upper surface protrudes.

[0129] A flat area that is not protruding, excluding the protrusion (131) from the lower pad (130), can be called a flat area (132). The flat area (132) can be positioned between adjacent protrusions (131). At least a portion of the flat area (132) can be positioned at a location corresponding to the venting area (V) of the battery cell (120).

[0130] Each protrusion (131) can support one or more battery cells (120). At least some of the support areas (S) of the plurality of battery cells (120) can be supported by the protrusion (131). The number of protrusions (131) and the number of battery cells (120) may differ. The protrusion (131) may have a size and shape sufficient to support the battery cells (120).

[0131] According to the above embodiment, since multiple battery cells (120) can be supported with only one lower pad (130), the manufacturing process and structure of the battery module (100) can be simplified.

[0132] According to one embodiment, at least some of the plurality of protrusions (131) may have elasticity. The elasticity of the protrusions (131) can relieve pressure on the lower part of the battery cell (120).

[0133] For example, the protrusion (131) may have elasticity by including a flexible or elastic material as part of the lower pad (130). The lower pad (130) may include an elastic material throughout, or may further include an elastic pad in the area corresponding to the protrusion (131).

[0134] As another example, elasticity can be achieved by separately placing an elastic material, such as a spring, at the bottom of the protrusion (131).

[0135] The elastic protrusion (131) can relieve pressure applied to the bottom of the battery cell (120). Therefore, the possibility of the bottom of the battery cell (120) rupturing can be reduced. In this case, the possibility of a problem occurring where a substance such as an electrolyte leaks out of the battery cell (120) from the bottom due to damage to the battery cell (120) can be reduced.

[0136] The lower pad (130) illustrated in FIG. 8 is shown in a cross-section viewed along the CC' cutting line of the lower pad (130) in FIG. 6. Referring to FIG. 6 through FIG. 8, at least some of the plurality of protrusions (131) may include a curved surface that is convex toward the upper side.

[0137] The curved surface of the protrusion (131) can support at least a portion of the support area (S) of the battery cell (120). The curved surface of the protrusion (131) may have a structure roughly similar to a dome.

[0138] According to the above embodiment, the load of the battery cell (120) can be distributed in a lateral direction, and the load of the battery cell (120) can be transmitted along the curved surface and evenly distributed to other areas, such as the flat portion of the lower pad (130).

[0139] In addition, the curved surface of the protrusion (131) may be elastic due to its shape characteristics. Therefore, it may have the same or similar advantages as the elastic protrusion (131) of the previously described embodiment.

[0140] Meanwhile, the curved surface of the protrusion (131) can be provided with an appropriate size, shape, and curvature, taking into account the load, shape, and supporting area of ​​the battery cell (120).

[0141] A number of protrusions (131) including a curved surface may be arranged in the longitudinal direction (Y-axis direction) of the battery cell (120). For example, referring to FIG. 8, two protrusions (131) including a curved surface may be arranged in the longitudinal direction (Y-axis direction) of the battery cell (120). In this case, a flat portion (132) may be placed between the two protrusions (131).

[0142] According to this embodiment, the protrusion can evenly support the battery cell while having sufficient elasticity overall in the longitudinal direction of the battery cell.

[0143] The size, arrangement, and ratio of the lower pad (130), protrusion (131), flat portion (132), and battery cell (120) shown in FIGS. 6 to 8 are exemplary, and a person skilled in the art can appropriately design the size, arrangement, and ratio of these components through experiments, etc.

[0144] Referring to FIG. 8, an air layer (134) may be formed between at least some of the plurality of protrusions (131) and the lower plate of the module. The air layer (134) may be formed in an empty space provided on the lower side of the protrusion (131). The air layer (134) may also be formed in the lower space of the dome of the aforementioned protrusion (131).

[0145] The air layer (134) on the lower side of the protrusion (131) can relieve pressure and impact applied from the upper side of the protrusion (131), thereby relieving pressure applied to the lower part of the battery cell (120). Accordingly, the possibility of the lower part of the battery cell (120) rupturing can be reduced, and the possibility of a problem occurring where a substance such as an electrolyte leaks out of the lower part of the battery cell (120) can be reduced. In addition, this air layer can partially relieve impact from the outside.

[0146] Referring to FIG. 7, the lower pad (130) according to an embodiment of the present invention may further include an incision (135). The incision (135) may be formed by cutting at least a portion of the lower pad (130). A space may be formed on the lower side of the incision (135). The incision (135) may be formed by cutting at least a portion of the lower pad (130) along the longitudinal direction of the battery cell (120). Here, the longitudinal direction of the battery cell (120) may refer to the Y-axis direction when referring to FIG. 6 to FIG. 8. The incision (135) may guide the gas discharged from the venting area (V) to be discharged in the lower direction of the lower pad (130). Gas discharged to the lower side of the lower pad (130) can be discharged to the outside through a venting hole (112) formed in the module bottom plate (111) of the battery module (100) (see FIG. 1 and FIG. 2).

[0147] The battery cell (120) undergoes a chemical reaction during charging and discharging, inevitably generating heat. The cut portion (135) can help effectively release the heat generated from the nearby battery cell (120) to the outside of the battery module (100). Thus, the cut portion (135) can prevent thermal events by preventing the battery cell (120) from overheating, thereby reducing the likelihood of a thermal event occurring in the battery cell (120). Additionally, it can provide a space for the gas to be discharged downwards even if gas is generated from the battery cell (120) due to a thermal event. Therefore, by allowing the lower venting to be more smooth, damage caused by the thermal event can be suppressed.

[0148] Meanwhile, the incision (135) can be formed by cutting at least one side of at least some of the plurality of protrusions (131).

[0149] For example, the incision (135) can be formed by cutting both sides of the protrusion (131). As another example, after the incision (135) is formed, the protrusion (131) can be formed by lifting it upward.

[0150] A space may be formed on the lower side of the protrusion (131). The cut portion (135) may connect the lower part of the venting area (V) with the space on the lower side of the protrusion (131).

[0151] FIG. 9 is a perspective view illustrating a battery module according to another embodiment of the present invention. FIG. 10 is a cross-sectional view illustrating a lower pad and a module bottom plate according to another embodiment of the present invention.

[0152] FIGS. 9 and FIGS. 10 are drawings for illustrating an embodiment that further includes an elastic body (161) in the embodiment described above with reference to FIGS. 6 to 8. Descriptions of configurations and structures already described in the embodiment described above with reference to FIGS. 6 to 8 may be omitted.

[0153] Each protrusion (131) can support one or more battery cells (120).

[0154] Referring to FIGS. 9 and 10, the battery module may further include one or more elastic bodies (161) that are positioned between at least some of the plurality of protrusions (131) and the module bottom plate (111) to support the protrusions (131). The elastic body (161) may include a material having an elastic restoring force of a predetermined size. The elastic body (161) may be provided in a configuration such as a spring having an elastic restoring force due to its structural features.

[0155] For example, the elastic body (161) may be configured as part of the lower pad (130) and positioned between the protrusion (131) and the module bottom plate (111). As another example, the elastic body (161) may be positioned between the protrusion (131) and the module bottom plate (111) by being attached to at least one of the lower pad (130) or the module bottom plate (111).

[0156] The elastic body (161) can support the protrusion (131). By supporting the protrusion (131), the elastic body (161) can also support the battery cell (120) positioned above the protrusion (131). The elastic body (161) can support the protrusion (131) so that the protrusion (131) does not sag downward due to the load of the battery cell (120).

[0157] The elastic body (161), together with the protrusion (131), can further relieve the pressure applied to the lower part of the battery cell (120) and further reduce the possibility of the lower part of the battery cell (120) rupturing.

[0158] The lower pad (130) shown in FIG. 10 is a cross-section of the lower pad (130) of FIG. 9 viewed through the EE' cutting line.

[0159] The curved surface of the protrusion (131) can have elasticity in its shape itself, and the elasticity can be reinforced by the elastic body (161).

[0160] The size, arrangement, and ratio of the lower pad (130), protrusion (131), flat portion (132), elastic body (161), and battery cell (120) shown in FIGS. 9 and 10 are exemplary, and a person skilled in the art can appropriately design the size, arrangement, and ratio of these components through experiments, etc.

[0161] Referring to FIG. 10, an elastic body (161) disposed between at least some of the multiple protrusions (131) and the module bottom plate may be formed in an empty space provided on the lower side of the protrusions (131) and the module bottom plate (111).

[0162] The elastic body (161) on the lower side of the protrusion (131) can relieve pressure and impact applied from the upper side of the protrusion (131), thereby relieving pressure applied to the lower part of the battery cell (120). Accordingly, the possibility of the lower part of the battery cell (120) rupturing is reduced, and the possibility of a problem occurring where a substance such as an electrolyte leaks out of the battery cell (120) from the lower part of the battery cell (120) is reduced.

[0163] FIG. 11 is a perspective view illustrating a battery module according to another embodiment of the present invention. FIG. 12 is a cross-sectional view illustrating a lower pad and a module bottom plate according to another embodiment of the present invention.

[0164] FIGS. 11 and FIGS. 12 are drawings for illustrating an embodiment that further includes a support member (162) in the embodiment described above with reference to FIGS. 6 to 8. Descriptions of configurations and structures already described in the embodiment described above with reference to FIGS. 6 to 8 may be omitted.

[0165] Each protrusion (131) can support one or more battery cells (120).

[0166] Referring to FIGS. 9 and 10, the battery module may further include one or more support members (162) disposed between at least some of the plurality of protrusions (131) and the module bottom plate (111) to support the protrusions (131). The support member (162) may include a material having an elastic restoring force of a predetermined size. For example, the support member (162) may include a material identical or similar to the lower pad (130). As another example, the support member (162) may include a material having a better elastic restoring force than the lower pad (130). As yet another example, the support member (162) may include a material that is easy to compress.

[0167] The support member (162) may be configured as part of the lower pad (130) and positioned between the protrusion (131) and the module bottom plate (111). As another example, the support member (162) may be positioned between the protrusion (131) and the module bottom plate (111) by being attached to at least one of the lower pad (130) or the module bottom plate (111).

[0168] The support member (162) can also support the battery cell (120) positioned above the protrusion (131) by supporting the protrusion (131). The support member (162) can support the protrusion (131) so that the protrusion (131) does not sag downward due to the load of the battery cell (120).

[0169] The support member (162), together with the protrusion (131), can further relieve the pressure applied to the lower part of the battery cell (120) and further reduce the possibility of the lower part of the battery cell (120) rupturing.

[0170] The lower pad (130) shown in FIG. 12 is a cross-section of the lower pad (130) of FIG. 11 viewed along the FF' cutting line.

[0171] The curved surface of the protrusion (131) can have elasticity in its shape itself, and the elasticity can be reinforced by the support (162).

[0172] The size, arrangement, and ratio of the lower pad (130), protrusion (131), flat portion (132), support portion (162), and battery cell (120) shown in FIGS. 11 and 12 are exemplary, and a person skilled in the art can appropriately design the size, arrangement, and ratio of these components through experiments, etc.

[0173] Referring to FIG. 12, a support member (162) disposed between at least some of the multiple protrusions (131) and the module bottom plate may be formed in an empty space provided on the lower side of the protrusions (131) and the module bottom plate (111).

[0174] The support portion (162) on the lower side of the protrusion (131) can relieve pressure and impact applied from the upper side of the protrusion (131), thereby relieving pressure applied to the lower part of the battery cell (120). Accordingly, the possibility of the lower part of the battery cell (120) rupturing is reduced, and the possibility of a problem occurring where a substance such as an electrolyte leaks out of the battery cell (120) from the lower part of the battery cell (120) is reduced.

[0175] Referring to FIGS. 13 and 14, a plurality of pad holes (133) may be formed in the lower pad (130). The plurality of pad holes (133) are also shown in the lower pad (130) of FIGS. 6 and 7. A plurality of pad holes (133) may be formed throughout the lower pad (130).

[0176] The pad hole (133) can be formed in the support area (S) as well as the venting area (V).

[0177] Gas generated from the battery cell (120) can be discharged more smoothly toward the bottom of the lower pad (130) through the pad holes (133). Thus, the multiple pad holes (133) can help effectively discharge heat generated from the nearby battery cell (120) to the outside of the battery cell (120). The pad holes (133) can prevent thermal events by preventing the nearby battery cell (120) from overheating, thereby reducing the likelihood of a thermal event occurring in the battery cell (120), and can suppress damage caused by the thermal event by guiding the gas to be discharged downward even if the battery cell (120) overheats and a thermal event occurs.

[0178] As described above, the pad hole (133) may have a function similar to the aforementioned incision (135). While the incision (135) discharges gas discharged from the venting area (V) into the lower space of the protrusion (131), the pad holes (133) can discharge gas discharged from the venting area (V) directly into the lower space of the venting area (V). Therefore, the pad hole (133) and the incision (135) can perform similar functions while being mutually complementary.

[0179] Meanwhile, among the plurality of pad holes (133), the pad hole (133a) formed at the position corresponding to the venting area (V) may be formed larger than the pad hole (133b) in other areas. For example, the pad hole (133a) formed at the position corresponding to the venting area (V) may be formed larger than the size of the pad hole (133b) formed at the position corresponding to the support area (S).

[0180] As described above with reference to FIG. 3, the venting area (V) can be an outlet through which flames, gases, sparks, etc. are discharged when a thermal event occurs in the battery cell (120), so the pad hole (133) formed at the position corresponding to the venting area (V) is formed larger so that venting can be performed more smoothly.

[0181] Referring to FIGS. 13 and 14, one protrusion (131) can support a plurality of battery cells (120). For example, at least one of the plurality of protrusions (131) can support a support area (S) of two adjacent battery cells (120). For example, two battery cells (120) are arranged so that their respective support areas (S) are adjacent to each other, and one protrusion (131) can support two adjacent support areas (S).

[0182] According to the above embodiment, the protrusion (131) does not obstruct the space between the venting area (V) and the pad hole (133a) below it, so it can stably support the support area (S) without hindering the discharge of venting gas from the venting area (V). Furthermore, since one protrusion (131) supports a plurality of battery cells (120), the manufacturing process of the lower pad (130) and / or the protrusion (131) is simplified, and space can be utilized efficiently.

[0183] FIG. 15 is a drawing for explaining a battery pack including a battery module according to one embodiment of the present invention.

[0184] Referring to FIG. 15, a battery pack (1) according to one embodiment of the present invention may include one or more of the battery modules (100) described above with reference to other drawings.

[0185] Additionally, the battery pack (1) may further include components other than the battery module (100) according to the present invention. For example, the battery pack (1) according to the present invention may further include components such as a Battery Management System (BMS), a busbar, a relay, and a current sensor.

[0186] The battery pack (1) may further include a pack case (200). The pack case (200) may provide a space in which one or more battery modules (100) can be stored. When multiple battery modules (100) are stored in the battery pack (1), the pack case (200) may include a partitioned space to divide and store the multiple battery modules (100).

[0187] The top plate of the pack case (200) may be referred to as the pack top plate (210). FIG. 11 illustrates a battery pack (1) in which the pack top plate (210) of the pack case (200) is separated from other components (e.g., bottom plate, left plate, right plate, front plate, and rear plate). For example, the pack case (200) may include a top plate, bottom plate, left plate, right plate, front plate, and rear plate based on the shape of a rectangular prism. In this case, the left plate, right plate, front plate, and / or rear plate located on the side may be formed in the shape of a beam. At least some of the plurality of plates or beams included in the pack case (200) may be a single component, but are not limited thereto. The components of the pack case (200) may be joined by methods such as welding or bolting, but are not limited thereto.

[0188] The configuration, material, shape, and coupling method of the pack case (200) included in the present invention are not limited to those described above.

[0189] The pack top plate (210) can be positioned to cover the upper direction (+Z-axis direction) of the space where the battery module (100) is placed. After the battery modules (100) are placed in the internal space of the pack case (200), the pack top plate (210) can cover the upper side of the pack case (200) to close the internal space.

[0190] As previously mentioned, since the battery module (100) is capable of downward venting, the battery pack (1) may also include a configuration capable of discharging gas emitted from the battery cells within the battery module (100) downward. If the battery pack (1) is mounted at a position lower than the occupants of a vehicle, such as an electric vehicle, gas emitted upward from the battery pack (1) may cause harm to the occupants. According to the battery pack (1) of the present invention, gas is discharged downward so as not to cause harm to the occupants, thereby improving the safety of the occupants.

[0191] FIG. 16 is a schematic exploded perspective view of a battery pack according to another embodiment of the present invention.

[0192] The battery pack (1) may include a plurality of battery modules (100), a pack case (200), a lower pad (130), and a BMS. The battery cell (120) may have the same configuration as the battery cell (120) inside the battery module (100) mentioned in other embodiments described above with reference to other drawings. For example, the battery cell (120) may be at least one of a pouch-type secondary battery, a cylindrical secondary battery, or a prismatic secondary battery.

[0193] Referring to FIG. 16, the battery cell (120) may not be placed in the internal space of the module case, but may be directly housed in the internal space of the pack case (200). The battery pack (1) may include the battery cell (120) and may be configured in an integrated form where the module case and the pack case are not separated. For example, the module case (110) of the battery module (100) described above may be configured to function as the pack case (200) of FIG. 12. In a battery pack (1) of this type, the battery cell (120) is directly housed in the pack case (200) that replaces the module case, so it may be called a cell-to-pack (CTP). According to the embodiment described with reference to FIG. 12, the technical concept of the present invention may also be applied to a battery pack (1) in the form of a CTP.

[0194] FIG. 17 is a cross-sectional view illustrating a battery pack including a battery module according to embodiments of the present invention.

[0195] The battery pack (1) may be any one of the battery pack (1) described with reference to FIG. 11 or FIG. 12. The battery module (100) may also be any one of the battery module (100) described with reference to other drawings.

[0196] The battery pack (1) may include a battery module (100) and a pack case (200). The pack case (200) may accommodate multiple battery modules (100) in its internal space.

[0197] The pack case (200) may include a pack top plate (210), a venting passage (220), and a pack hole (230).

[0198] A venting passage (220) may be disposed at the bottom of a plurality of battery modules (100). As described above with reference to other drawings, a venting hole (112) may be disposed at the bottom of the battery modules (100). The venting passage (220) may be connected to the outside of the battery pack (1) and the venting hole (112). The venting passage (220) may discharge gas discharged from the venting hole (112) at the bottom of the battery module (100) to the outside of the battery pack (1).

[0199] One or more pack holes (230) may be formed in one area of ​​the venting passage (220). For example, one or more pack holes (230) may be formed on the upper side of the venting passage (220). The pack holes (230) may be holes or passages formed in an area corresponding to the venting hole (112) at the bottom of the battery module (100). The venting passage (220) may receive gas discharged from the venting hole (112) of the battery module (100) through the pack holes (230).

[0200] Additionally, as shown in FIG. 17, the battery pack may further include a heat sink (240).

[0201] The heat sink (240) is intended to cool the battery module (100) and may include a metal material with high thermal conductivity. For example, the heat sink (240) may include copper, aluminum or an alloy thereof, or ceramic, graphite, carbon fiber, plastic composite material, etc. The heat sink (240) may come into contact with the battery module (100) over as large an area as possible, and its location is not particularly limited. For example, as shown in FIG. 13, the heat sink (240) may be placed on the upper side of the battery modules (100).

[0202] The pack space (250) may refer to the remaining space excluding the space where the battery module (100) is placed inside the pack case (200). Various components of the battery pack (1), including the battery module (100), may be placed in the pack space (250). For example, components such as a Battery Management System (BMS), busbars, relays, current sensors, or beams for space partitioning may be placed in the pack space (250). The pack space (250) may be placed in the space above the venting passage (220), just like the battery modules (100).

[0203] According to the above embodiment, the venting gas discharge path of the battery module (100) and the battery pack (1) including it can be isolated from other components. For example, gas generated in the battery module (100) is discharged to the bottom of the battery module (100) through the venting hole (112), and this gas can then be discharged to the outside through the venting passage (220) while isolated from other components. Accordingly, the impact of the venting gas generated in the battery module (100) on other battery modules (100) is reduced, and the impact on other components of the battery pack (1) (BMS, busbar, relay, current sensor, etc.) that can be placed in the pack space (250) can also be suppressed.

[0204] FIG. 18 is a drawing for explaining a battery module, a battery pack, and a vehicle including the same according to an embodiment of the present invention.

[0205] Referring to FIG. 18, the vehicle (2) may include one or more battery packs (1) or battery modules. For example, the vehicle (2) may be any one of an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle, but is not limited thereto. The vehicle (2) may be any one of a four-wheeled vehicle or a two-wheeled vehicle. The vehicle (2) may operate by receiving power from the battery pack (1) or battery module according to embodiments of the present invention.

[0206] 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.

[0207] 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. This means that even if the combination between configurations is not directly described, combination is possible except where it is described that combination is impossible.

[0208] The foregoing 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 module case including a module bottom plate having a space formed inside and a venting hole formed for discharging gas; A plurality of battery cells disposed in the internal space of the module case, each having a venting area at the bottom capable of discharging internal gas in a downward direction, and a support area provided in at least a part of the area excluding the venting area at the bottom; and One or more lower pads disposed between the module bottom plate and the plurality of battery cells to support the support area; A battery module including 2. In Paragraph 1, A plurality of venting holes are formed in the lower plate of the above module, and The above battery cells are provided in multiple numbers, A battery module in which at least some of the venting regions of the plurality of battery cells are positioned opposite to the venting hole.

3. In Paragraph 1, The above module case further includes a module top plate, and An upper pad disposed between the module top plate and the plurality of battery cells to secure the plurality of battery cells; A battery module that further includes 4. In Paragraph 1, The battery cell comprises a cell outer material having a housing portion for housing an electrode assembly and a sealing portion for sealing the housing portion, and A battery module, wherein at least a portion of the sealing portion is disposed in an area corresponding to the venting area.

5. In Paragraph 4, A battery module in which at least a portion of the sealing portion is folded and positioned in an area corresponding to the venting area.

6. In Paragraph 4, The sealing portion disposed in the area corresponding to the venting area is a battery module, at least a portion of which is folded.

7. In Paragraph 1, One of the above-mentioned lower pads includes a plurality of protrusions formed in an upward direction, and A battery module in which at least some of the support regions of the plurality of battery cells are supported by the protrusions.

8. In Paragraph 7, One or more elastic bodies disposed between at least some of the plurality of protrusions and the module bottom plate to support the protrusions; A battery module that further includes 9. In Paragraph 7, One or more support members disposed between at least some of the plurality of protrusions and the module bottom plate to support the protrusions; A battery module that further includes 10. In Paragraph 7, A battery module in which at least some of the plurality of protrusions have elasticity.

11. In Paragraph 7, A battery module in which at least some of the plurality of protrusions include an upwardly convex curved surface.

12. In Paragraph 7, A battery module having an air layer formed between at least some of the plurality of protrusions and the module bottom plate.

13. In Paragraph 7, The battery module, wherein the lower pad further comprises an incision formed by cutting at least one side.

14. In Paragraph 13, The above-mentioned incision is a battery module formed by cutting both sides of the above-mentioned protrusion.

15. In Paragraph 7, A battery module having a plurality of pad holes formed in the lower pad above.

16. In Paragraph 15, A battery module in which a pad hole formed at a position corresponding to the venting area among the plurality of pad holes is formed larger than the size of a pad hole formed at a position corresponding to the support area.

17. In Paragraph 7, A battery module, wherein at least one of the plurality of protrusions supports a support area of ​​two adjacent battery cells.

18. A battery pack comprising a battery module of any one of claims 1 to 16.

19. In Paragraph 18, A pack case accommodating the above battery module; Includes more, The above-described pack case is disposed at the bottom of the plurality of battery modules and includes a venting passage for discharging gas discharged from the venting hole to the outside, a battery pack.

20. A vehicle comprising the battery pack of claim 18.