Battery pack and Vehicle including the same

Abstract

The present invention relates to a battery pack comprising: at least one battery assembly having a plurality of battery cells and an assembly housing configured to accommodate the plurality of battery cells and have at least one side open; a pack case accommodating the battery assembly; and a cooling member configured to cover the open side of the assembly housing, wherein a cooling medium flows inside.

Description

Technology Field

[0001] The present invention relates to a battery pack and an automobile including the same, and more specifically, to a battery pack capable of effective venting and cooling of a battery assembly and an automobile including the same. Background Technology

[0002] Secondary batteries, which possess electrical characteristics such as high energy density and high applicability across product groups, are widely applied not only to portable devices but also to electric vehicles (EVs) or hybrid electric vehicles (HEVs) powered by electric sources. These secondary batteries are attracting attention as a new energy source for enhancing eco-friendliness and energy efficiency, not only for the primary advantage of drastically reducing the use of fossil fuels but also because they generate no by-products from energy use.

[0003] Currently, widely used types of rechargeable batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. When high output voltage is required, multiple battery cells are connected in series to form a battery assembly or battery pack. Additionally, to increase charge / discharge capacity, multiple battery cells are connected in parallel to form a battery assembly or battery pack.

[0004] When configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to first construct a battery assembly containing at least one battery cell, and then use this at least one battery assembly to add other components to form a battery pack or battery rack. Alternatively, recently, battery packs in the form of a "Cell-to-Pack," in which multiple battery cells are directly housed in a pack housing without modularization, are also being manufactured.

[0005] However, when multiple battery assemblies are contained within a battery pack in this manner, they may be vulnerable to thermal chain reactions between the assemblies. For example, if an event such as thermal runaway occurs within a single battery assembly, this runaway can propagate to other battery assemblies. If the propagation of thermal runaway between battery assemblies is not properly suppressed, an event originating in a specific battery assembly can trigger a chain reaction across multiple assemblies, potentially causing serious problems such as explosions or fires.

[0006] To this end, a conventional battery pack includes a venting means for smoothly discharging high-temperature venting gas, etc., emitted from a battery cell or battery assembly, and a cooling means for cooling the battery cell or battery assembly. For example, the venting means is provided on the top or side, and the cooling means is provided on the bottom, so that unidirectional cooling is achieved.

[0007] However, in the case of unidirectional cooling, if a thermal event occurs in a battery cell or battery assembly, thermal energy cannot be released smoothly, and heat may be transferred to other battery cells or battery assemblies. Furthermore, if venting gases or similar substances move within the battery pack, heat may be transferred to other battery assemblies, raising concerns about a thermal chain reaction in those assemblies. The problem to be solved

[0008] Accordingly, the problem that the present invention aims to solve is to provide a battery pack capable of preventing or suppressing the propagation of thermal runaway within the battery pack by improving the cooling performance of the battery cell or battery assembly and minimizing the thermal energy received by an adjacent battery assembly when an event such as thermal runaway occurs in the battery pack.

[0009] However, the problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by those skilled in the art from the description of the invention below. means of solving the problem

[0010] To solve the above problem, the present invention provides a battery pack comprising: at least one battery assembly having a plurality of battery cells and an assembly housing configured to accommodate the plurality of battery cells and have at least one side open; a pack case accommodating the battery assembly; and a cooling member configured to cover the open side of the assembly housing, wherein a cooling medium flows inside.

[0011] The above cooling member may have a cooling portion configured such that at least a portion protrudes outwardly and the cooling medium flows inside.

[0012] The above cooling member may have a cooling baffle section configured to guide the flow of the cooling medium by being provided in the cooling section.

[0013] The above cooling member may include a first cooling member configured to cover the lower surface of the plurality of battery cells and a second cooling member configured to cover the upper surface of the plurality of battery cells.

[0014] The above battery assembly is provided in multiple numbers, and the cooling member may be provided individually for each of the multiple battery assemblies.

[0015] Each of the above-mentioned battery assemblies may be provided with a cooling pipe configured to allow a cooling medium to flow into the cooling member.

[0016] The above cooling pipes can be connected to each other and configured so that the cooling medium circulates.

[0017] The cooling member may have a venting hole configured to allow venting gas generated in the battery assembly to be discharged to the outside.

[0018] A battery pack according to one embodiment of the present invention may further include a fireproof sheet provided on the inner side of the cooling member and configured to cover the venting hole.

[0019] A battery pack according to one embodiment of the present invention may further include a venting member provided inside the pack case and configured to allow venting gas discharged from the venting hole to flow.

[0020] The above-mentioned venting member may be provided with a venting portion configured such that its outer surface is partially recessed and communicates with the venting hole.

[0021] The above venting hole may include a first venting hole positioned approximately in the center of the battery assembly and a second venting hole positioned further outward than the first venting hole in the battery assembly.

[0022] The above venting section may include a first venting section configured to communicate with the first venting hole, a second venting section configured to communicate with the second venting hole, and a third venting section configured to communicate with the first venting section and the second venting section.

[0023] The above pack case may have a base frame provided on the outer side of the venting member, and a side frame extending upward from the corner of the base frame and having a side channel formed therein that communicates with the venting part in the internal space.

[0024] The above pack case may be equipped with a venting device configured to communicate with the outside of the venting section.

[0025] And, the present invention provides an automobile characterized by including a battery pack according to the present invention. Effects of the invention

[0026] According to one aspect of the present invention, the cooling medium directly cools the battery cell from both sides, thereby ensuring efficient cooling performance of the battery pack.

[0027] Furthermore, according to another aspect of the present invention, the movement of a fluid, such as a venting gas, toward an adjacent battery cell and / or battery assembly can be minimized. This prevents or suppresses the propagation of thermal runaway between the battery cell and / or battery assembly, thereby ensuring the safety and reliability of the battery pack.

[0028] In addition, according to another aspect of the present invention, venting gas generated in the battery assembly can be rapidly discharged to the outside of the battery pack, thereby ensuring safe venting performance of the battery pack.

[0029] In addition, according to another aspect of the present invention, events resulting from thermal runaway phenomena in a device equipped with a battery pack, such as fire or explosion, can be prevented or delayed.

[0030] In addition to the above, the present invention may have various other effects, which are described in each embodiment, or effects that can be easily inferred by those skilled in the art, etc., will be omitted. Brief explanation of the drawing

[0031] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings. FIG. 1 is an overall perspective view of a battery pack according to one embodiment of the present invention. FIG. 2 is an exploded perspective view of a battery pack according to one embodiment of the present invention. FIG. 3 is a cross-sectional view of a battery pack according to one embodiment of the present invention. For example, FIG. 3 may be a drawing showing the cross-section I-I' of FIG. 1. FIG. 4 is a cross-sectional view of a battery pack according to one embodiment of the present invention. For example, FIG. 4 may be a drawing showing the cross-section II-II' of FIG. 1. FIG. 5 is a top view of a cooling member included in a battery pack according to one embodiment of the present invention. FIG. 6 is an upper perspective view of a battery assembly combined with a cooling member according to one embodiment of the present invention. FIG. 7 is a bottom perspective view of a battery assembly combined with a cooling member according to one embodiment of the present invention. FIG. 8 is a perspective view showing a disassembled portion of a battery assembly according to one embodiment of the present invention. FIG. 9 is a drawing showing the interior of a battery pack according to one embodiment of the present invention. FIG. 10 is a cross-sectional perspective view showing a part of a battery pack according to one embodiment of the present invention. FIG. 11 is a bottom view of a battery assembly combined with a cooling member according to one embodiment of the present invention. FIG. 12 is a cross-sectional perspective view showing the flow of a cooling medium and a venting gas in a battery pack according to one embodiment of the present invention. FIG. 13 is an enlarged cross-sectional view showing the flow of venting gas when a thermal event occurs in a battery pack according to one embodiment of the present invention. FIG. 14 is a cross-sectional view showing the flow of venting gas when a thermal event occurs in a battery pack according to one embodiment of the present invention. FIG. 15 is an exploded perspective view of a part of a battery pack according to one embodiment of the present invention. FIG. 16 is a bottom perspective view of a venting member included in a battery pack according to one embodiment of the present invention. FIG. 17 is a bottom view of a venting member included in a battery pack according to one embodiment of the present invention. FIG. 18 is a bottom view showing the flow of venting gas when a thermal event occurs in a venting member of a battery pack according to one embodiment of the present invention. FIG. 19 is a perspective view showing the flow of venting gas when a thermal event occurs in a battery pack according to one embodiment of the present invention. FIG. 20 is a schematic perspective view of a vehicle including a battery pack according to one embodiment of the present invention. Specific details for implementing the invention

[0032] 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, but 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.

[0033] 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.

[0034] 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.

[0035] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back may be used in the present invention, these terms are used merely for convenience of explanation and may vary depending on the position of the object or the position of the observer, as is obvious to those skilled in the art of the present invention.

[0036] For example, in an embodiment of the present invention, the X-axis direction shown in the drawing may mean the front-back direction, the Y-axis direction may mean the left-right direction perpendicular to the X-axis direction on the horizontal plane (XY plane), and the Z-axis direction may mean the up-down direction (vertical direction) perpendicular to both the X-axis direction and the Y-axis direction.

[0038] FIG. 1 is an overall perspective view of a battery pack according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of a battery pack according to an embodiment of the present invention. In addition, FIG. 3 is a cross-sectional view of a battery pack according to an embodiment of the present invention. For example, FIG. 3 may be a drawing showing the cross-section along I-I' of FIG. 1.

[0039] Referring to FIGS. 1 to 3, a battery pack (1) according to one embodiment of the present invention may include a battery assembly (100), a pack case (200), and a cooling member (300).

[0040] A plurality of battery cells (110) may be included. Although not shown in the drawing, these plurality of battery cells (110) may include an electrode assembly, a cell case that accommodates the electrode assembly, and an electrode lead that is connected to the electrode assembly and extends outward from the cell case to function as an electrode terminal. At this time, the plurality of battery cells (110) may be electrically connected to each other.

[0041] A plurality of battery cells (110) can be stacked in at least one direction. For example, as shown in FIG. 2, a plurality of battery cells (110) can be arranged side by side in the front-back direction (X-axis direction) while standing upright in the vertical direction (Z-axis direction).

[0042] Meanwhile, the present invention is not limited by the specific type or shape of such battery cell (110), and various battery cells (110) known at the time of filing the present invention may be employed to constitute the battery pack (1) of the present invention. In this embodiment, a pouch-type secondary battery with high energy density and easy stacking is used as shown in the drawing, but it is understood that cylindrical or prismatic secondary batteries may also be applied as battery cells (110).

[0043] Meanwhile, a plurality of battery cells (110) may be grouped into one or more battery assemblies (100). That is, the battery pack (1) according to the present invention includes a plurality of battery assemblies (100), and the plurality of battery cells (110) included in the battery pack (1) may be divided and included in the plurality of battery assemblies (100). At this time, the multiple battery cells (110) included within the battery assembly (100) may be electrically connected to each other.

[0044] Additionally, the battery assembly (100) may include an assembly housing (120). The assembly housing (120) may be configured to accommodate a battery cell (110) in the internal space by forming an empty space inside. That is, the assembly housing (120) may group a plurality of battery cells (110) into multiple battery assemblies (100) and serve as a boundary that physically limits the internal space of each battery assembly (100).

[0045] The assembly housing (120) may be made of a metal material having rigidity and heat resistance to physically or chemically protect the housed battery cell (110).

[0046] Additionally, the battery assembly (100) may include a busbar assembly and / or module terminals electrically connected to a plurality of battery cells (110).

[0047] The above pack case (200) may be configured to accommodate a plurality of battery assemblies (100). The pack case (200) may be provided in a box shape including a plurality of frames.

[0048] The pack case (200) may be made of a material capable of ensuring mechanical strength, such as steel or SUS metal or plastic, or may include such a material, in order to safely protect the battery cell (110) housed inside.

[0049] Multiple battery assemblies (100) may be arranged in various structures or arrangements within the pack case (200). For example, some of the multiple battery assemblies (100) may be arranged in rows in the X-axis direction, and each may have a predetermined width in the X-axis direction. Also, other parts of the multiple battery assemblies (100) may be arranged in rows in the Y-axis direction, and each may have a predetermined width in the Y-axis direction. However, the structure or arrangement of the multiple battery assemblies (100) is not limited thereto.

[0050] The cooling member (300) may be provided inside the pack case (200). The cooling member (300) may be configured to cool the battery assembly (100). The cooling member (300) may be configured to have a cooling medium flowing inside. The cooling medium may be supplied from outside the battery pack (1) and discharged to the outside, or may circulate inside the battery pack (1).

[0051] The cooling member (300) may be provided at a location adjacent to the battery assembly (100) or provided to be in contact with the battery assembly (100). The cooling member (300) may be provided on one side of the battery assembly (100). For example, as in the embodiment shown in FIG. 3, the cooling member (300) may be provided on the upper and lower parts of the battery assembly (100).

[0052] In particular, the assembly housing (120) may be configured so that at least one side is open. For example, the assembly housing (120) may be configured so that the upper and lower sides are open. In this case, the cooling member (300) may be configured to cover the open side of the assembly housing (120). That is, the cooling member (300) may be configured to cover the open upper and lower sides of the assembly housing (120).

[0053] According to the above embodiment of the present invention, since the cooling medium of the cooling member (300) can directly cool the battery cell (110) provided inside the assembly housing (120), efficient cooling performance of the battery assembly (100) to the battery pack (1) can be secured.

[0054] Furthermore, according to the above embodiment of the present invention, since a cooling member (300) is provided as a separate member from the pack case (200), repair or replacement of the cooling member (300) can be easy, thereby improving assembly.

[0056] Meanwhile, referring to FIGS. 1 and FIGS. 2, etc., the pack case (200) may include a base frame (210) and a plurality of side frames (220).

[0057] The base frame (210) can be configured to allow the battery assembly (100) to be seated. The base frame (210) can form the lower surface of the pack case (200) and can be provided in the shape of a square plate. Additionally, the base frame (210) can be provided with a flat upper surface so that the battery assembly (100) can be stably seated.

[0058] A plurality of side frames (220) may be provided extending upward from each corner of the base frame (210). A plurality of side frames (220) may be provided to surround a plurality of battery assemblies (100). More specifically, the plurality of side frames (220) may each be provided as a rear wall located at the +X direction side end of the base frame (210), a right wall located at the +Y direction side end, a front wall located at the -X direction side end, and a left wall located at the -Y direction side end, thereby forming the sides of the pack case (200).

[0059] Additionally, the pack case (200) may include a cross beam (230). The cross beam (230) may be configured to partition the internal space of the pack case (200). The cross beam (230) may be configured to partition a plurality of battery assemblies (100). The cross beam (230) may be configured to extend along the left-right direction and / or the front-back direction of the pack case (200).

[0060] The cross beam (230) may be provided in multiple numbers. The cross beam (230) may be provided to connect side frames (220) facing each other among a plurality of side frames (220).

[0061] Meanwhile, the pack case (200) may further include a cover frame (240). The cover frame (240) may be configured to cover the upper portion of a plurality of battery assemblies (100). The cover frame (240) may be provided to form the upper surface of the pack case (200). The cover frame (240) may be coupled to the side frame (220). Alternatively, the cover frame (240) may be provided integrated with the side frame (220).

[0063] FIG. 4 is a cross-sectional view of a battery pack according to one embodiment of the present invention. For example, FIG. 4 may be a drawing showing the cross-section II-II' of FIG. 1.

[0064] Referring to FIG. 4, the cooling member (300) may be provided with a cooling section (310). The cooling section (310) may be configured such that at least a portion of the cooling member (300) protrudes outward. Accordingly, the cooling section (310) may be configured such that a cooling medium flows within the protruding space. The cooling section (310) may be configured to extend long along the longitudinal direction of the battery cell (110).

[0065] The cooling member (300) may have a cooling channel (C) formed by the cooling section (310). The cooling channel (C) may refer to a passage configured to allow a cooling medium, such as cooling water, to flow. The cooling channel (C) may refer to a space provided between the cooling sections (310).

[0066] According to the above embodiment of the present invention, a cooling unit (310) is provided so that a cooling medium can flow even without a separate space being formed inside the cooling member (300), thereby improving the energy density of the battery pack (1).

[0067] In addition, according to the above embodiment of the present invention, the cooling medium inside the cooling channel (C) of the pack case (200) can be configured to directly exchange heat with the battery cell (110) inside the battery assembly (100).

[0069] Furthermore, referring to FIG. 4, a battery pack (1) according to one embodiment of the present invention may further include a thermally conductive adhesive (400). The thermally conductive adhesive (400) may be provided between a battery cell (110) and a cooling member (300). The thermally conductive adhesive (400) may be configured to transfer heat between the battery cell (110) and the cooling member (300).

[0070] According to the above embodiment of the present invention, the thermally conductive adhesive (400) facilitates heat transfer between the battery cell (110) and the cooling member (300), thereby allowing heat generated in the battery cell (110) to be properly discharged to the outside through the cooling member (300). Accordingly, the cooling performance of the battery assembly (100) can be stably secured.

[0071] The thermally conductive adhesive (400) may be provided with a material capable of transferring heat. In particular, the thermally conductive adhesive (400) may be made of a resin material, and in this case, the thermally conductive adhesive (400) may be referred to as a thermal resin. The thermally conductive adhesive (400) may include at least one material among various materials, such as urethane, silicone, and epoxy. The thermally conductive adhesive (400) may be expressed by other terms such as TIM (Thermal Interface Material) or potting resin, and as the material of the thermally conductive adhesive (400) of the battery pack (1) according to the present invention, various thermally conductive adhesives or TIMs known at the time of filing the present invention may be used.

[0072] A thermally conductive adhesive (400) may be interposed between the entire battery cell (110) and the cooling member (300) provided in the battery assembly (100). That is, the thermally conductive adhesive (400) may be configured to be in direct contact with all the battery cells (110) included in the battery assembly (100).

[0073] According to this embodiment of the present invention, heat dissipation through a thermally conductive adhesive (400) can be achieved for all battery cells (110) included in the battery assembly (100). Accordingly, the overall cooling performance of the battery assembly (100) can be further improved.

[0074] Additionally, the thermally conductive adhesive (400) may be configured to secure the battery cell (110) to the cooling member (300). To this end, the thermally conductive adhesive (400) may have an adhesive component.

[0075] Additionally, when the thermally conductive adhesive (400) is applied to cover the battery cell (110) and cured, the upper surface of the thermally conductive adhesive (400) may be configured to be approximately flat. A cooling member (300) may be configured to come into contact with the thermally conductive adhesive (400). Accordingly, a cooling medium may be configured to fill the space between the cooling member (310) and the thermally conductive adhesive (400).

[0076] According to the above embodiment of the present invention, the thermally conductive adhesive (400) can transfer heat between the cooling media of the cooling member (300). As a result, heat transfer between the battery cell (110) and the cooling member (300) can be achieved more quickly and reliably.

[0078] FIG. 5 is a top view of a cooling member included in a battery pack according to one embodiment of the present invention.

[0079] Referring to FIG. 5, the cooling member (300) may be provided with a cooling partition (320). The cooling partition (320) may be provided in the cooling section (310). At least a portion of the cooling member (300) may protrude inward (e.g., toward the battery assembly (100)). The thickness of the protruding cooling partition (320) may be formed to be equal to the thickness of the cooling section (310) protruding outward.

[0080] These cooling baffles (320) can guide the flow of the cooling medium. The cooling baffles (320) may be formed to extend long to one side. The cooling baffles (320) may be extended long enough to pass through the cooling section (310).

[0081] The cooling partition (320) may be configured to partition the cooling channel (C) of the cooling section (310). For example, as shown in FIG. 5, the end of the cooling partition (320) in the Y-axis direction may be configured in a closed form to block the cooling section (310) located in the -Y direction and the cooling section (310) located in the +Y direction from each other.

[0082] Additionally, the cooling baffle section (320) may be configured to change the flow direction of the cooling medium. A gap may be formed between the end of the cooling baffle section (320) and the cooling section (310), and the flow direction of the cooling medium may be changed in the gap. For example, as shown in FIG. 5, the end of the cooling baffle section (320) in the Y-axis direction may be spaced apart from the cooling section (310) so that a gap is formed between them, and the flow direction of the cooling medium may be changed in the X-axis direction in the gap.

[0083] In this way, when the cooling member (300) is provided with a cooling partition (320), the flow direction of the cooling medium in the cooling section (310) can be formed in various ways. Additionally, the flow path of the cooling medium in the cooling section (310) can be extended. Furthermore, the flow path of the cooling medium can be formed to pass through all of the multiple battery assemblies (100).

[0085] FIG. 6 is a top perspective view of a battery assembly combined with a cooling member according to an embodiment of the present invention, FIG. 7 is a bottom perspective view of a battery assembly combined with a cooling member according to an embodiment of the present invention, and FIG. 8 is a perspective view showing a disassembled portion of a battery assembly according to an embodiment of the present invention.

[0086] Referring to FIGS. 6 through 8, cooling members (300) may be provided on both sides of the battery assembly (100). The lower and upper surfaces of the assembly housing (120) may be configured to be at least partially open. For example, as in the embodiment shown in FIGS. 6 through 8, the upper and lower surfaces of the assembly housing (120) may be configured to be completely open. Accordingly, the assembly housing (120) may be configured to cover four of the six sides of the plurality of battery cells (110), excluding the upper and lower surfaces. At this time, the assembly housing (120) may be configured in a rectangular shape when viewed from above.

[0087] The cooling member (300) may be configured to cover both open sides of the assembly housing (120). For example, as in the embodiment shown in FIGS. 6 to 8, the cooling member (300) may be configured to cover the open upper and lower sides of the assembly housing (120).

[0088] Specifically, the cooling member (300) may include a first cooling member (300A) configured to cover the lower surface of a plurality of battery cells (110) and a second cooling member (300B) configured to cover the upper surface of a plurality of battery cells (110).

[0089] According to the above embodiment of the present invention, since the upper and lower surfaces of the assembly housing (120) do not exist, the battery cells (110) can come into direct contact with the cooling medium within the cooling member (300). Accordingly, since the cooling medium within the cooling member (300) can directly cool the battery cells (110), efficient cooling performance of the battery pack (1) can be secured.

[0090] Furthermore, according to the above embodiment of the present invention, the battery cell (110) or the battery assembly (100) can be cooled from both sides, thereby minimizing the accumulation of thermal energy in the battery assembly (100). In particular, the cooling performance of the battery pack (1) can be secured by minimizing the heat generated by the battery assembly (100) due to the charge / discharge cycle in the normal state of the battery pack (1). Additionally, according to the above embodiment of the present invention, the temperature variation within the battery cell (110) can be minimized by uniformly cooling the battery cell (110) from both sides.

[0092] Meanwhile, a plurality of battery assemblies (100) may be provided, and a cooling member (300) may be provided individually for each of the plurality of battery assemblies (100). That is, a cooling member (300) may be provided in each battery assembly (100). The cross-sectional area of ​​the cooling member (300) may be configured to correspond approximately to the cross-sectional area of ​​the battery assembly (100). In particular, a first cooling member (300A) and a second cooling member (300B) may be provided in each battery assembly (100).

[0093] At this time, the first cooling member (300A) and the second cooling member (300B) may be configured to accommodate a plurality of battery cells (110) together with the assembly housing (120). The first cooling member (300A) and the second cooling member (300B) may be configured to cover the upper and lower surfaces among the six sides of the plurality of battery cells (110). Accordingly, the first cooling member (300A), the second cooling member (300B), and the assembly housing (120) may be configured in a cuboid shape to accommodate a plurality of battery cells (110).

[0094] According to the above embodiment of the present invention, since the cooling channel (C) can be provided at the level of the battery assembly (100), the cooling member (300) can independently cool a plurality of battery cells (110) as a separate configuration from the pack case (200). Accordingly, replacement or repair of the cooling member (300) becomes easier, and assembly can be improved.

[0095] In addition, according to the above embodiment of the present invention, since a separate cooling plate configuration is unnecessary, the height of the battery pack (1) can be minimized. Accordingly, the energy efficiency of the battery pack (1) can be maximized.

[0097] FIG. 9 is a drawing showing the interior of a battery pack according to one embodiment of the present invention, and FIG. 10 is a cross-sectional perspective view showing a part of a battery pack according to one embodiment of the present invention.

[0098] With further reference to FIGS. 9 and FIGS. 10, together with FIGS. 6 to 8, a structure in which a cooling medium flows within a cooling member (300) will be described. First, referring to FIGS. 6 to 10, the cooling member (300) may be provided with a cooling inlet / outlet (330) through which the cooling medium can enter or exit.

[0099] A plurality of cooling inlets / outlets (330) may be provided. One of the plurality of cooling inlets / outlets (330) may be configured as an inlet for the cooling medium to enter the cooling section (310), and the other may be configured as an outlet for the cooling medium to exit from the cooling section (310).

[0100] Furthermore, the battery assembly (100) may be provided with a cooling pipe (130). The cooling pipe (130) may be provided in each battery assembly (100). The cooling pipe (130) may be configured so that a cooling medium flows into a cooling member (300).

[0101] The cooling pipe (130) may be configured to be connected to the cooling inlet / outlet (330). The cooling pipe (130) may be configured to allow a cooling medium to flow in or out from the outside. The cooling pipe (130) may be configured to allow a cooling medium to flow through it, either circulating inside the pack case (200) or flowing in from the outside.

[0102] Additionally, the cooling pipe (130) may be configured to simultaneously supply or discharge a cooling medium to a first cooling member (300A) and a second cooling member (300B) in a single battery assembly (100). The cooling pipe (130) may be configured to allow the cooling medium to flow between the first cooling member (300A) and the second cooling member (300B) provided in the single battery assembly (100). The cooling pipe (130) may be configured to connect the cooling inlet / outlet (330) of the first cooling member (300A) and the cooling inlet / outlet (330) of the second cooling member (300B) to each other. At this time, the cooling pipe (130) may be configured in a T-shape.

[0103] Alternatively, the cooling pipe (130) may be configured to separately supply or discharge a cooling medium to the cooling inlet / outlet (330) of the first cooling member (300A) and the cooling inlet / outlet (330) of the second cooling member (300B). In this case, the cooling pipe (130) may be configured in a straight line. According to this embodiment, even if either the first cooling member (300A) or the second cooling member (300B) does not operate, the other one can continue to operate. This allows the cooling performance of the battery pack (1) to be maintained for as long as possible even when a thermal event occurs.

[0104] Referring to FIGS. 9 and FIGS. 10, the cooling pipes (130) provided in each battery assembly (100) can be configured to be connected to each other. The cooling pipes (130) can be configured so that a cooling medium circulates in a plurality of battery assemblies (100).

[0105] To this end, a battery pack (1) according to one embodiment of the present invention may further include a connecting pipe (700). The connecting pipe (700) may be configured to interconnect adjacent cooling pipes (130). As in the embodiment illustrated in FIG. 9, a plurality of cooling pipes (130) may be interconnected to the connecting pipe (700) so that a cooling medium flows through the entire cooling member (300) provided in the battery pack (1).

[0106] The connecting pipe (700) may be provided as a hose. The connecting pipe (700) may include a material having elasticity. For example, the connecting pipe (700) may include a rubber material. Thus, since the shape of the connecting pipe (700) can be easily deformed, the cooling pipes (130) can be interconnected regardless of the position of the cooling pipes (130).

[0107] In this way, as the connecting pipe (700) is provided, a plurality of cooling members (300) can be connected in series and / or in parallel so that the cooling medium can be circulated. Accordingly, even if the cooling member (300) is provided individually for each battery assembly (100), the cooling medium can be efficiently circulated.

[0108] A cooling medium may be supplied from outside the battery pack (1). At this time, the battery pack (1) may be provided with an inlet (I) and an outlet (O). The inlet (I) may be configured to supply a cooling medium from outside the battery pack (1). The outlet (O) may be configured to discharge the cooling medium, which has flowed through a plurality of cooling members (300), to the outside of the battery pack (1). The inlet (I) and the outlet (O) may be configured to communicate with a connecting pipe (700), a cooling pipe (130), and a cooling member (300).

[0110] FIG. 11 is a bottom view of a battery assembly combined with a cooling member according to one embodiment of the present invention, and FIG. 12 is a cross-sectional perspective view showing the flow of a cooling medium and a venting gas in a battery pack according to one embodiment of the present invention.

[0111] Referring to FIG. 11, the cooling member (300) may be provided with a venting hole (H). For example, the venting hole (H) may be provided in the first cooling member (300A). The venting hole (H) may be provided in multiple numbers. The multiple venting holes (H) may be provided at regular intervals from each other in the horizontal direction. The cooling member (300) may be provided with multiple venting holes (H) corresponding to each of the multiple battery assemblies (100).

[0112] According to the above embodiment of the present invention, high-temperature gas or flames generated in the battery cell (110) in the event of an abnormal situation of the battery cell (110) can be rapidly discharged to the outside of the battery assembly (100), thereby effectively preventing or delaying the propagation of thermal runaway between the battery cells (110).

[0113] Additionally, the cooling member (300) and the assembly housing (120) can be joined together to form a sealed structure. Accordingly, when a thermal event occurs in the battery cell (110) and venting gas is discharged, the venting gas can be guided to be discharged only through the first cooling member (300A) in which the venting hole (H) is formed. According to the above embodiment, venting of the battery assembly (100) or battery pack (1) can be centered on the lower direction rather than the upper or horizontal direction.

[0114] Furthermore, referring to FIG. 12, the venting hole (H) and the cooling section (310) are provided together in the cooling member (300), but the venting hole (H) may be configured not to be in communication with the cooling section (310). The venting hole (H) may be provided at a location that does not correspond to the cooling section (310). The venting hole (H) and the cooling section (310) of the cooling member (300) may be arranged alternately. Specifically, the venting hole (H) and the cooling section (310) may be arranged alternately in the area of ​​the cooling member (300) corresponding to the battery assembly (100). That is, the venting hole (H) and the cooling section (310) may be alternately corresponding to a single battery assembly (100).

[0115] In FIG. 11, the venting hole (H) and the cooling section (310) are shown to be arranged alternately along the X-axis direction. For example, the venting hole (H) may be arranged between any two cooling sections (310) that are spaced apart from each other in the X-axis direction.

[0116] As described above, when the venting hole (H) and the cooling section (310) are arranged alternately, venting can be performed at various locations of the battery assembly (100), and the battery assembly (100) can be cooled more evenly. Accordingly, venting gas can be discharged more effectively from the battery assembly (100), and the cooling performance of the cooling section (310) can be improved. In addition, there is an advantage that both venting and cooling can be effectively performed on one side of a single battery assembly (100).

[0117] According to the above embodiment of the present invention, venting and cooling of the battery assembly (100) are applied on the same side of the assembly housing (120), but the venting path (see bold arrow in FIG. 12) and the cooling area (see dotted arrow in FIG. 12) can be separated.

[0118] Thus, both the venting performance and the cooling performance of the battery pack (1) can be improved. Additionally, the venting hole (H) and the cooling section (310) can be separated, so that the cooling medium can be effectively blocked from flowing into the venting hole (H) or the venting gas can be blocked from flowing into the cooling section (310).

[0120] FIG. 13 is an enlarged cross-sectional view showing the flow of venting gas when a thermal event occurs in a battery pack according to one embodiment of the present invention.

[0121] Referring to FIGS. 8 and FIGS. 13, a battery pack (1) according to one embodiment of the present invention may further include a fireproof sheet (500). The fireproof sheet (500) may include a heat-resistant material. Here, the heat-resistant material refers to a material having high heat resistance and / or fire resistance, and various materials such as mica may be applied.

[0122] A fireproof sheet (500) may be provided on the inner side of the cooling member (300). The fireproof sheet (500) may be placed between the battery assembly (100) and the cooling member (300). The fireproof sheet (500) may be provided on the outer side of the thermally conductive adhesive (400). That is, the fireproof sheet (500) may be interposed between the thermally conductive adhesive (400) and the cooling member (300).

[0123] Furthermore, the refractory sheet (500) may be configured to cover the venting hole (H). The refractory sheet (500) may be configured in the form of a sheet. The refractory sheet (500) may be configured to cover the venting hole (H) from the inside. Such a refractory sheet (500) may be configured to break or melt due to the pressure or heat of the venting gas. For example, the refractory sheet (500) may be configured in the form of a break line or a pre-break line so that it can be easily ruptured by the venting gas in the venting hole (H), and the break line or pre-break line may be formed by notching or the like.

[0124] According to the above embodiment of the present invention, if the battery pack (1) further includes a fireproof sheet (500), the backflow of venting gas can be effectively prevented. Specifically, when a thermal event occurs in a specific battery cell (110) and venting gas is discharged, the fireproof sheet (500) may rupture only in the part corresponding to the battery cell (110), and the remaining parts may not rupture. Therefore, the backflow of venting gas discharged from the battery cell (110) into another battery cell (110) can be effectively prevented.

[0125] For example, as illustrated in FIG. 13, when venting gas discharged from a specific battery cell (110) penetrates the fireproof sheet (500) and passes through the venting hole (H), this venting gas may not be recirculated back into the venting hole (H) provided on the other battery cell (110) side by the fireproof sheet (500).

[0126] Meanwhile, the fireproof sheet (500) may be individually provided only in the part corresponding to the venting hole (H) so as to cover only the venting hole (H).

[0128] FIG. 14 is a cross-sectional view showing the flow of venting gas when a thermal event occurs in a battery pack according to one embodiment of the present invention, FIG. 15 is an exploded perspective view of a part of the battery pack according to one embodiment of the present invention, and FIG. 16 is a bottom perspective view of a venting member included in a battery pack according to one embodiment of the present invention.

[0129] Referring to FIGS. 14 to 16, a battery pack (1) according to one embodiment of the present invention may further include a venting member (600). The venting member (600) may be provided inside the pack case (200). The venting member (600) may be configured to allow venting gas discharged from a venting hole (H) to flow.

[0130] The venting member (600) may be configured to face the cooling member (300). The venting member (600) may be configured in the form of a plate. The venting member (600) may be configured to face all of the plurality of cooling members (300). The venting member (600) may be configured to correspond approximately to the size of the pack case (200).

[0131] According to the above embodiment of the present invention, when a thermal event occurs in the battery assembly (100), the venting gas, etc. can move directly to the venting member (600). Accordingly, the venting gas, etc. can be rapidly discharged to the outside of the battery assembly (100) and the cooling member (300), thereby increasing the venting efficiency. This increases the safety of the battery pack (1).

[0132] Furthermore, for example, the venting member (600) may be provided at the bottom of the battery assembly (100). The venting member (600) may be configured to allow the battery assembly (100) to be seated. The venting member (600) may be configured to face the first cooling member (300A).

[0133] In the case of a vehicle equipped with a battery pack (1), a passenger, such as a driver, is generally positioned above the battery cells (110). If a thermal event occurs and venting gas is discharged to the upper side of the battery cells (110), it may pose a significant risk to the safety of the passenger. Therefore, as in the present invention, if a venting member (600) is positioned on the lower side of the battery assembly (100), the venting gas can be guided to the lower side opposite the passenger.

[0134] As in the present invention, when a venting member (600) is placed on the lower side of a battery assembly (100), the venting gas is guided only in the downward direction, so the heat transfer phenomenon can be minimized.

[0136] Referring to FIGS. 14 and 16, the venting member (600) may be provided with a venting section (610). The venting section (610) may be configured to allow the venting gas discharged from the venting hole (H) of the battery assembly (100) to flow. That is, a flow path through which the venting gas flows may be provided in the venting section (610). After being discharged through the venting hole (H), the venting gas may flow through the venting section (610) and be discharged outside the battery pack (1).

[0137] The venting portion (610) may be formed in a shape where the outer surface of the venting member (600) is partially recessed. For example, the venting portion (610) may be formed in the shape of a groove where the lower surface of the venting member (600) is partially recessed inward. Accordingly, a flow path through which venting gas flows may be formed.

[0138] The venting section (610) may be configured to communicate with the venting hole (H). The venting section (610) may be provided at a position corresponding to the venting hole (H). The venting section (610) may communicate with the venting hole (H) of each of the plurality of cooling members (300).

[0139] The venting section (610) may be configured to pass through a plurality of battery assemblies (100). For example, a plurality of battery assemblies (100) may be stacked and arranged inside a pack case (200), and the venting section (610) may be configured such that at least a portion of it extends along the stacking direction of the battery assemblies so as to pass through one side of the plurality of battery assemblies (100).

[0141] Meanwhile, in the description so far, the venting member (600) may be in a closed shape toward the outer direction, such as the downward direction (-Z-axis direction). Specifically, in FIG. 16, for convenience of explanation, the venting portion (610) of the venting member (600) is shown as being open toward the lower side, but is not limited thereto, and the venting portion (610) of the venting member (600) according to the present invention may be implemented in a shape where the lower side is closed.

[0142] For example, the base frame (210) may be positioned on the outside of the venting member (600). For example, the base frame (210) may be positioned on the lower side of the venting member (600) and may face the bottom of the venting member (600). The base frame (210) may be positioned in close contact with the venting member (600). The base frame (210) may cover the portion open to the lower side of the venting member (600). The venting member (600) and the base frame (210) may be bolted together.

[0143] According to the above embodiment of the present invention, the venting section (610) can be covered by the base frame (210), so that the portions open to the lower side of the venting section (610) can be effectively closed by the base frame (210). Accordingly, the venting gas flow path of the venting section (610) can be formed more reliably sealed.

[0145] FIG. 17 is a bottom view of a venting member included in a battery pack according to one embodiment of the present invention, and FIG. 18 is a bottom view showing the flow of venting gas when a thermal event occurs in the venting member of a battery pack according to one embodiment of the present invention.

[0146] Hereinafter, a venting member (600) according to one embodiment of the present invention will be described in more detail with reference to FIGS. 14 to 18.

[0147] The venting hole (H) may have a first venting hole (H1) and a second venting hole (H2), particularly as illustrated in FIGS. 11 and 14. The first venting hole (H1) may be positioned approximately in the center of the battery assembly (100). For example, the first venting hole (H1) may be positioned in the center of the bottom portion on the -Z direction side of the battery assembly (100).

[0148] The first venting hole (H1) may be provided in multiple numbers. Each of the multiple first venting holes (H1) may be provided to correspond individually to at least one of the multiple battery cells (110) provided in the battery assembly (100).

[0149] The second venting hole (H2) may be positioned further outward than the first venting hole (H1) in the battery assembly (100). For example, the second venting hole (H2) may be positioned at the bottom of the battery assembly (100) in the -Z direction, and at each of the longitudinal ends of the battery assembly (100).

[0150] According to the above embodiment of the present invention, when the venting hole (H) is provided with a first venting hole (H1) and a second venting hole (H2), the venting hole (H) can be distributed and arranged at various locations of the battery assembly (100), so that the venting gas can be discharged more smoothly when a thermal event occurs.

[0152] In particular, referring to FIGS. 14, 16, 17 and 18, the venting section (610) may be equipped with a first venting section (611), a second venting section (612) and a third venting section (613).

[0153] The first venting section (611) can be connected to the first venting hole (H1). That is, venting gas discharged from the first venting hole (H1) of the battery assembly (100) can flow through the first venting section (611).

[0154] The venting member (600) may be provided with a first communication hole (621). The first communication hole (621) may be a hole that connects the first venting hole (H1) and the first venting section (611). The first communication hole (621) may be provided in correspondence with the first venting hole (H1). The first venting holes (H1) of any one cooling member (300) may be connected to a single first venting section (611), or the first venting holes (H1) of each of a plurality of cooling members (300) may be connected.

[0155] The second venting section (612) can be connected to the second venting hole (H2). That is, the venting gas discharged from the second venting hole (H2) of the battery assembly (100) can flow through the second venting section (612).

[0156] The venting member (600) may be provided with a second communication hole (622). The second communication hole (622) may be a hole that connects the second venting hole (H2) and the second venting section (612). The second communication hole (622) may be provided in correspondence with the second venting hole (H2). The second venting holes (H2) of any one cooling member (300) may be connected to a single second venting section (612), or the second venting holes (H2) of each of a plurality of cooling members (300) may be connected.

[0157] The third venting section (613) can be connected to the first venting section (611) and the second venting section (612). The third venting section (613) can connect the first venting section (611) and the second venting section (612). That is, in the third venting section (613), the venting gas flowing from the first venting section (611) and the venting gas flowing from the second venting section (612) can be combined with each other.

[0158] Furthermore, the venting member (600) may be provided with a discharge hole (630). The discharge hole (630) may be in communication with the third venting section (613). The discharge hole (630) may be in communication with the outside of the battery pack (1). That is, the venting gas flowing in the third venting section (613) may be discharged to the outside through the discharge hole (630). The discharge hole (630) may be configured to be in communication with the third venting section (613) and the side channel (221) and venting device (700) described later. The discharge hole (630) may be provided in multiple numbers.

[0159] As a specific example, referring to the bold arrows shown in FIG. 18, when a thermal event occurs in a battery assembly (100), the venting gas generated in the battery assembly (100) can be directly introduced into the first venting section (711) and the second venting section (712) and then moved to the third venting section (713). Additionally, this venting gas can be discharged to the outside through the exhaust hole (730).

[0160] According to the above embodiment of the present invention, when the venting section (610) is equipped with a first venting section (611), a second venting section (612), and a third venting section (613), venting gas can be discharged at various locations of the battery assembly (100), thereby enabling more effective venting. Additionally, the venting gas can be smoothly discharged to the outside of the battery pack (1).

[0161] Furthermore, referring to FIG. 16, the venting section (610) can be partitioned or grouped for each battery assembly (100) by the third venting section (613). Venting gas generated in any battery assembly (100) can be directly introduced into the first venting section (611) and the second venting section (612) and then moved to the third venting section (613). According to the above embodiment of the present invention, the venting gas may be minimized from moving toward the battery cells (110) provided in other battery assemblies (100). Accordingly, thermal runaway propagation within the battery pack (1) is prevented or suppressed, thereby ensuring the safety and reliability of the battery pack (1).

[0163] Referring to FIGS. 17 and 18, the venting member (600) may further comprise a venting partition (640). The venting partition (640) may be provided inside the venting section (610). The venting partition (640) may be provided between the second venting section (612) and the third venting section (613).

[0164] The venting baffle section (640) can be configured to increase the flow distance of the venting gas. Specifically, the venting baffle section (640) can increase the flow distance of the venting gas from the second venting section (612) to the discharge hole (630) by ensuring that the venting gas discharged from the second venting section (612) does not move directly toward the discharge hole (630) but is instead induced to move toward the opposite side of the discharge hole (630).

[0165] The venting bulkhead (640) may protrude outward from the venting member (600). The thickness of the protruding venting bulkhead (640) may be formed to be the same as the thickness of the venting portion (610).

[0166] The venting partition (640) may be formed by extending long between the second venting section (612) and the third venting section (613). For example, the venting partition (640) may be configured in a form that extends long in the X-axis direction or the Y-axis direction.

[0167] The second venting section (612) and the third venting section (613) can be blocked from each other at a location relatively close to the discharge hole (630) by the venting partition section (640). For example, as shown in FIG. 17, the -X direction end of the venting partition section (640) can be configured in a closed form to block the second venting section (612) located on the -Y direction side of the venting partition section (640) and the third venting section (613) located on the +Y direction side, and as a result, the second venting section (612) and the third venting section (613) can be blocked from each other at a location relatively close to the discharge hole (630) (e.g., on the -X direction side).

[0168] The second venting section (612) and the third venting section (613) can be connected to each other at a location relatively far from the discharge hole (630) by the venting partition section (640). For example, as shown in FIG. 17, the end of the venting partition section (640) in the +X direction can be configured in an open shape so that the second venting section (612) located on the -Y direction side of the venting partition section (640) and the third venting section (613) located on the +Y direction side are connected to each other, and as a result, the second venting section (612) and the third venting section (613) can be connected to each other at a location relatively far from the discharge hole (630) (e.g., on the +X direction side).

[0169] According to the above embodiment of the present invention, when the venting member (600) is provided with a venting partition (640) as described above, the flow distance of the venting gas can be increased, and thus the flow energy of the venting gas can be reduced more effectively.

[0170] Generally, when gas is ejected from the battery cell (110), pieces of electrode plates or active materials inside the battery cell (110) may be ejected to the outside while heated to a high temperature, and such high-temperature particles may appear in the form of a spark. The battery pack (1) according to the present invention prevents high-temperature particles from being ejected from the battery cell (110) from immediately and easily escaping to the outside of the battery pack (1), and allows them to escape after their temperature is sufficiently lowered while moving through the venting section (610), thereby preventing them from acting as an ignition source outside the battery pack (1).

[0171] In addition, according to the above embodiment of the present invention, the venting gas flowing in the third venting section (613) is prevented from spreading in all directions and can move quickly to the discharge hole (630) along the extension direction of the third venting section (613).

[0173] FIG. 19 is a perspective view showing the flow of venting gas when a thermal event occurs in a battery pack according to one embodiment of the present invention.

[0174] Referring to FIG. 19, a side channel (221) may be formed in the side frame (220). The side channel (221) may be formed in the internal space of the side frame (220). The side channel (221) may be provided as a hollow structure formed in the side frame (220). The side channel (221) may be configured to communicate with the venting section (610). In particular, the side channel (221) may be configured to communicate with the discharge hole (630). Accordingly, as shown by the dotted arrow in FIG. 19, venting gas, etc. flowing through the venting section (610) can be discharged into the side channel (221) through the discharge hole (630).

[0175] This venting gas can be discharged to the outside of the pack case (200). Specifically, the side channel (221) can be configured to communicate with the outside of the pack case (200).

[0176] The pack case (200) may include a venting device (250). The venting device (250) may be configured to discharge gas generated in the battery cell (110) to the outside of the pack case (200). The venting device (250) may be configured to open by the pressure of the venting gas and discharge the venting gas to the outside of the pack case (200) when the internal pressure rises due to the generation of venting gas inside the pack case (200).

[0177] The venting device (250) may be configured to open and close according to the internal pressure inside the pack case (200). Alternatively, the venting device (250) may be configured in the form of a hole. Meanwhile, the present invention is not limited by the specific type or form of such venting device (250), and various venting devices (250) known at the time of filing the present invention may be employed to constitute the battery pack (1) of the present invention.

[0178] Specifically, the venting device (250) may be provided on the side of the pack case (200), that is, on the side frame (220). Multiple venting devices (250) may be provided. The venting device (250) may be provided on at least one of the multiple side frames (220). The venting device (250) may be formed separately on each of two or more side frames (220), or two or more may be formed on a single side frame (220).

[0179] Meanwhile, the number or location of the venting device (250) described based on embodiments such as FIG. 2 and FIG. 19 is merely an example, and it is obvious that it can be changed to various other numbers or locations.

[0180] The venting device (250) can be configured to communicate with the outside of the pack case (200) and the venting section (610). The venting device (250) can be provided to communicate with a side channel (221) formed in the side frame (220). Thus, the venting gas of the side channel (221) can be configured to be discharged to the outside of the pack case (200) through the venting device (250).

[0181] According to the above embodiment of the present invention, when a thermal event occurs in the battery assembly (100), venting gas, etc. is discharged through the venting hole (H) of the cooling member (300) to the venting section (610) of the venting member (600), moves to the side channel (221), and then can be discharged to the outside of the pack case (200) through the venting device (250). That is, according to the above embodiment of the present invention, venting gas, etc. generated in the battery assembly (100) can be quickly discharged to the outside of the battery pack (1), thereby ensuring safe venting performance of the battery pack (1).

[0183] FIG. 20 is a schematic perspective view of a vehicle including a battery pack according to one embodiment of the present invention.

[0184] Referring to FIG. 20, a vehicle (3) according to one embodiment of the present invention may include one or more battery packs (1) according to one embodiment of the present invention. The vehicle (3) according to the present invention may be, for example, an electric vehicle, a hybrid vehicle, or a plug-in hybrid vehicle. The vehicle (3) may include a four-wheeled vehicle and a two-wheeled vehicle. The vehicle (3) may operate by receiving power from the battery pack (1) according to one embodiment of the present invention.

[0186] Although the present invention has been described above by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs. Explanation of the symbols

[0187] 3 : Cars 1 : Battery pack 100 : Battery assembly 110: Battery cell 120 : Assembly housing 130: Cooling pipe 200 : Pack case 210 : Base Frame 220 : Side frame 221 : Side channel 230 : Cross Beam 240 : Cover Frame 250 : Venting device 300 : Cooling element 310 : Cooling section C: Cooling channel H: Venting hole 320: Cooling bulkhead 330: Cooling inlet / outlet 400: Thermally conductive adhesive 500 : Fireproof sheet 600 : Venting absence 610 : Venting section 620 : Chimney hole 630 : Discharge hole 640 : Venting bulkhead 700 : Connecting pipe

Claims

Claim 1 A battery pack characterized by comprising: at least one battery assembly having a plurality of battery cells and an assembly housing configured to accommodate the plurality of battery cells and have at least one side open; a pack case accommodating the battery assembly; and a cooling member configured to cover the open side of the assembly housing, wherein a cooling medium flows inside. Claim 2 A battery pack according to claim 1, characterized in that the cooling member comprises a cooling portion configured such that at least a portion of it protrudes outwardly and the cooling medium flows inside. Claim 3 A battery pack according to paragraph 2, wherein the cooling member comprises a cooling partition portion configured to guide the flow of the cooling medium provided in the cooling portion. Claim 4 A battery pack according to claim 1, characterized in that the cooling member comprises a first cooling member configured to cover the lower surface of the plurality of battery cells and a second cooling member configured to cover the upper surface of the plurality of battery cells. Claim 5 A battery pack according to claim 1, wherein the battery assembly is provided in multiple numbers, and the cooling member is provided individually for each of the multiple battery assemblies. Claim 6 A battery pack according to claim 5, wherein each of the above battery assemblies is configured to have a cooling pipe configured to allow a cooling medium to flow into the cooling member. Claim 7 A battery pack according to claim 6, characterized in that the cooling pipes are connected to each other and configured to allow the cooling medium to circulate. Claim 8 A battery pack according to claim 1, wherein the cooling member is configured to have a venting hole configured to discharge venting gas generated in the battery assembly to the outside. Claim 9 A battery pack according to claim 8, further comprising a fireproof sheet provided on the inner side of the cooling member and configured to cover the venting hole. Claim 10 A battery pack according to claim 8, further comprising a venting member provided on the inner side of the pack case and configured to allow venting gas discharged from the venting hole to flow. Claim 11 A battery pack according to claim 10, wherein the venting member is provided with a venting portion configured such that its outer surface is partially recessed and communicates with the venting hole. Claim 12 A battery pack according to claim 11, characterized in that the venting hole comprises a first venting hole positioned approximately in the center of the battery assembly and a second venting hole positioned further outward than the first venting hole in the battery assembly. Claim 13 A battery pack according to claim 12, wherein the venting portion comprises a first venting portion configured to communicate with the first venting hole, a second venting portion configured to communicate with the second venting hole, and a third venting portion configured to communicate with the first venting portion and the second venting portion. Claim 14 A battery pack according to claim 11, wherein the pack case comprises a base frame provided on the outer side of the venting member and a side frame extending upward from the corner of the base frame and having a side channel formed therein configured to communicate with the venting part in the internal space. Claim 15 A battery pack according to claim 11, characterized in that the pack case comprises a venting device configured to communicate with the outside of the venting portion. Claim 16 An automobile comprising a battery pack according to any one of paragraphs 1 through 15.

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