Battery device

Abstract

The invention relates to a battery device. A battery device in various configurations includes: a battery pack; a housing for the battery pack; several flow paths located within the housing and arranged between the battery pack and the inner wall of the housing along which a cooling material for the heat generated by the battery pack flows; and a connecting device for connecting fluid to at least some of the several flow paths, wherein the connecting device may include a first connection and a second connection connected to the first connection and coupled to it so that it may move relative to the first connection within the housing.

Description

Battery device

[0001] Cross-citation with related applications

[0002] This application is based on and claims the benefit of priority from Korean Patent Application Nos. 10-2024-0111432, 10-2024-0188286 and 10-2025-0114843, filed with the Korean Intellectual Property Office on August 20, 2024, December 17, 2024 and August 19, 2025, respectively, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present application relates to a battery device.

[0005] As the development of electric vehicles, energy storage batteries, robots, and satellites accelerates, research is actively underway on high-performance secondary batteries that can be repeatedly charged and discharged as an energy source.

[0006] Currently commercially available secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium secondary batteries. Among these, lithium secondary batteries offer the advantages of virtually no memory effect compared to nickel-based batteries, allowing for easy charging and discharging, a very low self-discharge rate, and high energy density.

[0007] Recently, to improve energy density, battery cells have been placed in most of the space within a battery device, reducing the space available for peripheral components. Furthermore, the heat generated by numerous battery cells can impact the performance and safety of the device, requiring proper heat management.

[0008] Heat generated in the battery cells can be dissipated to the outside through cooling material flowing through the flow path, which is one of the peripheral components of the battery device.

[0009] Meanwhile, for ease of assembly, the flow paths provided in the battery device can be formed by connecting and assembling multiple disconnected flow paths (e.g., individual pipes). In this case, it is necessary to fluidly connect each of the mutually separated flow paths. Conventional methods have been considered for connecting multiple disconnected flow paths using a connector of an integrally formed structure or a press-fit hose made of an elastic material.

[0010] However, as the space for arranging peripheral components in the battery device decreases, there is a problem that it is difficult to secure free space for assembling the integrated connector, and there may be a problem that the method of destroying the press-fit hose during disassembly makes it impossible to reuse.

[0011] Various embodiments of the present application can provide a battery device with improved energy density through a reusable connecting device that is easy to assemble and disassemble even in a narrow space.

[0012] The technical problems of the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below.

[0013] A battery device according to one embodiment of the present application includes a battery assembly, a housing for accommodating the battery assembly, a plurality of flow paths arranged between the battery assembly and an inner wall of the housing inside the housing and through which a cooling material for cooling heat generated in the battery assembly flows, and a connecting device for fluidly connecting at least some of the plurality of flow paths, wherein the connecting device may include a first connecting portion and a second connecting portion connected to the first connecting portion and coupled to the first connecting portion so as to be relatively movable inside the housing.

[0014] In a battery device according to one embodiment of the present application, the second connector may include an insertion space into which the first connector can be at least partially inserted.

[0015] In a battery device according to one embodiment of the present application, the first connecting portion can move relatively along a direction in which at least a portion of the inside of the housing is inserted into or removed from the insertion space.

[0016] In a battery device according to one embodiment of the present application, the first connecting portion may at least partially include an area overlapping the second connecting portion when moving relative to each other.

[0017] In a battery device according to one embodiment of the present application, the first connecting portion may further include a first connecting portion that does not overlap with the second connecting portion when moving relative to the first connecting portion, and a first hook portion that is mounted on an outer surface of the first connecting portion and has a first protruding hook portion that protrudes inward toward the first connecting portion.

[0018] In a battery device according to one embodiment of the present application, the first hook portion further includes a handling portion that protrudes outward in an opposite direction to the protrusion direction of the first protruding hook portion, and the handling portion may be protruded so as not to overlap with the insertion space when viewed from the direction in which the first connecting portion moves relative to the other.

[0019] In a battery device according to one embodiment of the present application, the second connecting portion may further include a fixed connecting portion having a penetration formed therein so that a portion of the first connecting portion inserted into the insertion space is exposed.

[0020] In a battery device according to one embodiment of the present application, the connecting device may further include a connecting member at least partially connected between the first connecting member and the second connecting member to prevent relative movement of the first connecting member and the second connecting member through the through-hole.

[0021] In a battery device according to one embodiment of the present application, the fixed connection portion may further include a catch portion that is arranged to protrude from a surface facing the first insertion portion and come into contact with the handling portion when the first connection portion is inserted into the second connection portion.

[0022] In a battery device according to one embodiment of the present application, the fixed connection portion may further include a seating portion arranged to be recessed from a surface facing the first connection portion and to come into contact with the first hook portion when the first connection portion is inserted into the second connection portion.

[0023] In a battery device according to one embodiment of the present application, the first connecting portion may further include a first plate portion that is disposed between the insertion space and the first coupling portion when moving relative to each other and is connected to the first hook portion.

[0024] In a battery device according to one embodiment of the present application, the first plate portion may be arranged to at least partially overlap with the insertion space when viewed in the relative movement direction.

[0025] In a battery device according to one embodiment of the present application, the first plate portion may have a cross-sectional area larger than a cross-sectional area of ​​an area overlapping with the insertion space when viewed in the relative movement direction.

[0026] In a battery device according to one embodiment of the present application, the first coupling portion may have an inclined surface inclined with respect to the direction of relative movement.

[0027] In a battery device according to one embodiment of the present application, the first connecting portion may further include a groove in at least a portion of an area overlapping the second connecting portion when moving relative to the first connecting portion.

[0028] In a battery device according to one embodiment of the present application, the second connecting portion includes a second connecting portion that does not overlap with the first connecting portion when moving relative to the first connecting portion, and a main flow direction of a cooling material passing through the first connecting portion may be parallel to a main flow direction of a cooling material passing through the second connecting portion.

[0029] In a battery device according to one embodiment of the present application, the second connecting portion may further include a second hook portion mounted on an outer surface of the second coupling portion and having a second protruding hook portion protruding inward toward the second coupling portion.

[0030] In a battery device according to one embodiment of the present application, the main flow direction of the cooling material passing through a portion of the first connecting portion that overlaps the second connecting portion during relative movement may be parallel to the main flow direction of the cooling material passing through the first joining portion.

[0031] In a battery device according to one embodiment of the present application, the second connecting portion may further include a second plate portion disposed between the insertion space and the second coupling portion when moving relative to each other and connected to the second hook portion.

[0032] In a battery device according to one embodiment of the present application, the second connecting portion includes a second connecting portion that does not overlap with the first connecting portion when moving relative to the first connecting portion, and a main flow direction of a cooling material passing through the first connecting portion may be substantially perpendicular to a main flow direction of a cooling material passing through the second connecting portion.

[0033] In a battery device according to one embodiment of the present application, a main flow direction of a cooling material passing through a portion of a first connecting portion that overlaps a second connecting portion during relative movement may be parallel to a main flow direction of a cooling material passing through the first connecting portion and substantially perpendicular to a main flow direction of a cooling material passing through the second connecting portion.

[0034] Specific details of other embodiments may be found in the detailed description and drawings.

[0035] According to various embodiments of the present disclosure, a battery device can be provided that is easy to assemble and disassemble even in a narrow space, can be reused even when disassembled, does not waste space for unnecessary assembly within the battery device, improves energy density by appropriately processing heat generated from battery cells, etc., and has improved performance and safety.

[0036] The drawings shown in this application are according to an embodiment of this application, and the ratio of the width, width, or thickness (or height) of each component is for the purpose of explaining this application in detail, and these ratios may differ from the actual ones. In addition, in the coordinate system shown in the drawings, each axis may be perpendicular to each other, and the direction pointed by the arrow may be the + direction, and the direction opposite to the direction pointed by the arrow (the direction rotated by 180 degrees) may be the - direction.

[0037] FIG. 1 is a schematic exploded perspective view of a battery device according to one embodiment of the present application.

[0038] FIG. 2 is a partial perspective view of a battery device according to one embodiment of the present application.

[0039] FIG. 3 is a cross-sectional view schematically illustrating at least a portion of a battery device according to one embodiment of the present application.

[0040] FIGS. 4 to 6 are perspective views schematically illustrating a connection device of a battery device according to one embodiment of the present application.

[0041] FIGS. 7 to 9 are perspective views schematically illustrating a connection device of a battery device according to one embodiment of the present application.

[0042] Fig. 10 is an exploded perspective view of a connection device of a battery device according to one embodiment of the present application.

[0043] Fig. 11 is an exploded perspective view of a connection device of a battery device according to one embodiment of the present application.

[0044] FIG. 12 is a rear view schematically illustrating some of the connection devices of a battery device according to one embodiment of the present application.

[0045] FIG. 13 and FIG. 14 are perspective views schematically illustrating a connection device of a battery device according to one embodiment of the present application.

[0046] Fig. 15 is a cross-sectional view showing a cross-section of a first joint portion according to one embodiment of the present application.

[0047] Fig. 16 is an exploded perspective view of a connection device of a battery device according to one embodiment of the present application.

[0048] FIG. 17 and FIG. 18 are perspective views schematically illustrating a connection device of a battery device according to one embodiment of the present application.

[0049] Fig. 19 is an exploded perspective view of a connection device of a battery device according to one embodiment of the present application.

[0050] FIG. 20 is a cross-sectional view schematically illustrating at least a portion of an area where a combination according to one embodiment of the present application is in contact with a first connecting portion.

[0051] Before proceeding with a detailed description of this application, it should be noted that terms and words used in this specification and claims may not be interpreted solely based on their conventional or dictionary meanings. Furthermore, inventors should interpret terms and concepts in a way that aligns with the technical concept of this application, based on the principle that the inventor can appropriately define the concept of a term to best explain his or her invention. The embodiments described in this specification and the configurations depicted in the drawings represent only the most preferred embodiments of this application and may not represent the entire technical concept of this application. Therefore, various equivalents and variations may exist at the time of filing of this application.

[0052] The same reference numbers or symbols in each drawing attached to this specification may indicate parts or components that perform substantially the same functions. For convenience of explanation and understanding, the same reference numbers or symbols may be used in different embodiments. In other words, even if components with the same reference numbers are depicted in multiple drawings, they may not all represent a single embodiment.

[0053] In the following description, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as "comprise" or "comprises" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but are to be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0054] In addition, in the description below, expressions such as upper, upper, lower, lower, side, front, and rear are expressed based on the direction shown in the drawing, and may be expressed differently if the direction of the object is changed.

[0055] Additionally, terms including ordinal numbers, such as "first," "second," etc., may be used in this specification and claims to distinguish between components. These ordinal numbers may be used to distinguish identical or similar components from each other, and the use of these ordinal numbers should not be interpreted in a limited manner. For example, components associated with these ordinals should not be interpreted in a limited manner, such as in the order of use or arrangement, based on their numbers. If necessary, each ordinal number may be used interchangeably.

[0056] In this specification, the term "battery" may be used with the same meaning as "cell." Furthermore, the terms "battery" and "cell" may collectively refer to a battery cell, which is a unit thereof, or a battery module or battery pack containing a battery cell.

[0057] Various embodiments of the present application can provide a battery device that is easy to assemble and disassemble even in a narrow space, and that improves energy density by appropriately handling heat generated from battery cells, etc., while minimizing problems affecting performance and safety.

[0058] FIG. 1 is a schematic exploded perspective view of a battery device (10) according to one embodiment of the present application. FIG. 2 is a partial perspective view of a battery device (10) according to one embodiment of the present application. FIG. 3 is a simplified illustration of at least a portion (e.g., portion A of FIG. 1) of a battery device (10) according to one embodiment of the present application.

[0059] In this specification, a battery device (10) may mean anything that includes a battery cell. For example, the battery device (10) may be a battery pack that typically includes a battery module, a so-called cell-to-pack type battery pack that includes non-modularized battery cells, or a battery module that typically includes a battery cell.

[0060] In one example, the battery device (10) may include a battery assembly (100). In the present specification, the battery assembly (100) may include one or more battery cells. In one example, the battery assembly (100) may be a battery module in which battery cells are housed in a case. In one example, the battery assembly (100) may be in a form in which battery cells are stacked in one direction in an aligned form.

[0061] In one example, the battery device (10) may include a housing (200) that accommodates a battery assembly (100). The battery assembly (100) may be accommodated inside the housing (200). The shape of the housing (200) is not particularly limited as long as it can accommodate the battery assembly (100). For example, the housing (200) may have a hexahedral shape with one side open while forming a receiving space for accommodating the battery assembly (100), and the open side may be sealed with a cover or the like after assembly is completed. For example, the housing (200) may include a pack outer wall frame (1A-1) that surrounds at least a portion of the battery assembly (100) provided in the receiving space of the battery assembly (100). In addition, for example, the housing (200) may include a pack side wall (1A-2) extending in a first direction (e.g., in the D2 axis direction) and a cross member (1A-3) extending in a second direction (e.g., in the D1 axis direction) to partition a space for accommodating the battery assembly (100) in accordance with the size of the battery assembly (100). In addition, for example, the housing (200) may partition an electrical space (1A-4) in which an electrical device other than the battery assembly (100) can be accommodated through the pack side wall (1A-2) and the cross member (1A-3). For example, the electrical device may include a battery management system (BMS), which may be electrically connected to the battery assembly (100) included in the battery device (10) to transmit and receive data necessary for managing the battery assembly (100) and perform calculations based on the data.

[0062] In one example, the battery device (10) may include a flow path (300) through which a cooling substance flows (e.g., an inlet path (220) communicating with a coolant inlet pipe (1C-1) in FIG. 2 and an outlet path (230) communicating with a coolant outlet pipe (1C-2)). The cooling substance may cool heat generated in the battery assembly (100). The cooling substance is not particularly limited as long as it is a substance that causes a cooling effect and is used as a coolant in the art. For example, the cooling substance may include at least one of water, ammonia, freon gas, or methyl chloride. For example, the cooling substance may be introduced through the coolant inlet pipe (1C-1), flow around the battery assembly (100) along the inlet path (220) and the outlet path (230), and be introduced through the coolant outlet pipe (1C-2).

[0063] In one example, the flow path (300) (e.g., inlet path (220), outlet path (230)) may be positioned between the battery assembly (100) and the inner wall (1A-1, 200I) of the housing (200) within the housing (200). The flow path (300) may be a peripheral component of the battery device (10). In one example, the flow path (300) may be fixed to the inner wall (1A-1, 200I) of the housing (200) using a fixing device or the like.

[0064] In one example, the fluid path (300) may be plural. In one example, the fluid path (300) may include a first fluid path (300a) and a second fluid path (300b) that are fluidically isolated from each other, and the first fluid path (300a) and the second fluid path (300b) may be fluidly connected by a connecting device (400) that will be described later. In one example, the connecting device (400) may fluidly connect at least some of the plurality of fluid paths (300).

[0065] In one example, there may be multiple connecting devices (400) for fluidly connecting the first flow path (300a) and the second flow path (300b), but the present invention is not limited thereto.

[0066] Meanwhile, in one example, when there are multiple connection devices (400), an integrated connector (500) may be arranged between the connection devices (400). In one example, the integrated connector (500) may fluidly connect multiple different connection devices (400). In addition, even when there are not multiple connection devices (400), the integrated connector (500) may be arranged at one end of the connection device (400).

[0067] In general, an integrated connector (500) may require a considerable amount of assembly space in the process of connecting other members to both ends. However, when the connecting device (400) according to the embodiment of the present application is connected to both ends (or one end) of the integrated connector (500), the integrated connector (500) is connected first, and then the connecting device (400) is assembled, so there may be an advantage in that assembly can be performed even in a narrow space.

[0068] FIGS. 4 to 6 are perspective views schematically illustrating a connection device (400) of a battery device (10) according to one embodiment of the present application.

[0069] FIGS. 7 to 9 are perspective views schematically illustrating a connection device (400) of a battery device (10) according to one embodiment of the present application. FIGS. 10 and 11 are exploded perspective views schematically illustrating a connection device (400) of a battery device (10) according to one embodiment of the present application. FIG. 12 is a rear view schematically illustrating a part of a connection device (400) of a battery device (10) according to one embodiment of the present application.

[0070] In one example, the connecting device (400) may include a first connecting portion (410) and a second connecting portion (420) connected to the first connecting portion (410). In one example, the second connecting portion (420) may be coupled to the first connecting portion (410) so as to be relatively movable within the housing (200). In one example, the second connecting portion (420) may include an insertion space (420IA, FIG. 8) into which the first connecting portion (410) may be at least partially inserted. In one example, the insertion space (420IA) may have a shape corresponding to the outer shape and size of the first connecting portion (410) so that the first connecting portion (410) may be inserted. For example, at least a portion of the first connecting portion (410) inserted into the second connecting portion (420) may be cylindrical, and the insertion space (420IA) may be cylindrical according to this shape. In one example, the insertion space (420IA) may have an appropriate size and shape so that the first connecting portion (410) can be inserted smoothly and fit properly after insertion.

[0071] In one example, the first connecting portion (410) can move relative to the housing (200) along a direction (i.e., direction D2) in which at least a portion of the first connecting portion (410) is inserted into or removed from the insertion space (420IA). That is, for example, the direction of relative movement may be a direction in which at least a portion of the first connecting portion (410) is inserted into or removed from the insertion space (420IA).

[0072] In one example, the direction in which at least a portion of the first connecting portion (410) is inserted into or removed from the insertion space (420IA) may be a linear direction. For example, the first connecting portion (410) may move relatively in the direction in which at least a portion of the first connecting portion (410) is inserted into or removed from the insertion space (420IA) within the housing (200) (i.e., in the -D2 direction), or may move relatively in the direction in which the first connecting portion (410) is inserted into or removed from the insertion space (420IA) (i.e., in the +D2 direction).

[0073] In one example, the first connecting portion (410) may include an area that overlaps at least partially with the second connecting portion (420) during relative movement. In one example, the first connecting portion (410) may be at least partially inserted into the insertion space (420IA), and at least a portion of the portion of the first connecting portion (410) inserted into the insertion space (420IA) during relative movement may overlap with the second connecting portion (420).

[0074] In one example, in order to smoothly perform relative movement with respect to the second connecting portion (420), the first connecting portion (410) may have a lubricating layer formed on at least a portion of the surface of an area overlapping the second connecting portion (420) when the first connecting portion (410) moves relative to the second connecting portion (420). In one example, the lubricating layer may include one or more of a solid lubricant and a liquid lubricant. The solid lubricant may include one or more of molybdenum disulfide (MoS2), tungsten disulfide (WS2), graphite, and polytetrafluoroethylene (PTFE), but is not limited thereto, as long as it lowers the coefficient of friction. The solid lubricant may form the lubricating layer by a method such as coating or deposition. The liquid lubricant may include one or more of mineral oil-based lubricants, synthetic lubricants, and silicone oil, but is not limited thereto, as long as it lowers the coefficient of friction. The liquid lubricant may form the lubricating layer by a method such as coating or immersion.

[0075] In one example, a surface treatment portion having a lower surface roughness than a non-overlapping area may be formed on at least a portion of the surface of the first connecting portion (410) that overlaps with the second connecting portion (420) during relative movement. Through the surface treatment portion, the first connecting portion (410) can smoothly move relative to the second connecting portion (420). The surface treatment portion may be formed by, for example, surface polishing, but is not limited thereto.

[0076] In one example, the first connecting portion (410) may have a sealing member (e.g., an O-ring (440O)) attached to at least a portion of an area overlapping the second connecting portion (420) during relative movement. This can improve the sealing characteristics of the first connecting portion (410) and the second connecting portion (420) when the first connecting portion (410) moves relative to the second connecting portion (420).

[0077] In one example, the length of the connecting device (400) may vary depending on the degree to which the first connecting portion (410) is inserted into the insertion space (420IA). By adjusting the degree to which the first connecting portion (410) is inserted into the insertion space (420IA), the connecting device (400) may have an appropriate length, thereby facilitating assembly and disassembly within a narrow space, such as within the housing (200).

[0078] In one example, the first connecting portion (410) may include a first engaging portion (412) that does not overlap the second connecting portion (420) even when the first connecting portion (410) is fully engaged with the second connecting portion (420) during relative movement. In one example, the first connecting portion (410) may include a first hook portion (414) that is mounted on an outer surface of the first connecting portion (412) and has a first protruding catch portion (414HS) that protrudes inwardly toward the first connecting portion (412).

[0079] In one example, the first hook portion (414) may include a handling portion (414D) that is formed to protrude outwardly in a direction opposite to the protrusion direction of the first protruding catch portion (414HS). The handling portion (414D) may facilitate assembly and disassembly of the first connecting portion (410) and the second connecting portion (420) within a narrow space, such as within the housing (200).

[0080] In one example, the handling portion (414D) may be formed to protrude so as not to overlap with the insertion space (420IA). This prevents the first connection portion (410) from being excessively inserted into the second connection portion (420), thereby preventing difficulties in assembly or disassembly in a narrow space.

[0081] In one example, the second connecting portion (420) may include a fixed connecting portion (426) having a penetration portion (426G) formed therein so that a portion of the first connecting portion (410) inserted into the insertion space (420IA) is exposed.

[0082] In one example, the connecting device (400) may include a connecting member (428, FIGS. 10 and 11) that is at least partially connected between the first connecting member (410) and the second connecting member (420) to prevent relative movement of the first connecting member (410) and the second connecting member (420) by passing through the through-hole (426G). In one example, the through-hole (426G) may be formed to fit the shape of the connecting member (428), and when the connecting member (428) passes through the through-hole (426G), it may pressurize a portion of the first connecting member (410) inserted into the insertion space (420IA), thereby preventing relative movement of the first connecting member (410) and the second connecting member (420). That is, when working in a narrow space, the first connecting portion (410) and the second connecting portion (420) are moved relative to each other, and when an appropriate length (e.g., a length corresponding to the distance between each end of the flow path (300) to be connected through the connecting device (400)) is determined, the position of the first connecting portion (410) can be fixed through the coupling body (428).

[0083] In one example, the assembly (428) may include a main body portion (428-1) that is coupled by applying pressure between the first connection portion (410) and the second connection portion (420) through a penetration portion (426G). There may be a plurality of main body portions (428-1). In one example, the assembly (428) may include a connecting portion (428-2) that connects a plurality of main body portions (428-1) that are spaced apart from each other. For example, the assembly (428) may have a C-shaped structure in which two main body portions (428-1) are integrally connected through the connecting portion (428-2).

[0084] In one example, the connecting portion (428-2) may have appropriate elasticity. In one example, the connecting portion (428-2) may maintain a separation distance between the plurality of body portions (428-1) before applying pressure between the first connecting portion (410) and the second connecting portion (420). At this time, the separation distance between the plurality of body portions (428-1) may be smaller than the outer diameter of the first connecting portion (410) or the outer diameter of the second connecting portion (420) through the connecting portion (428-2). Through this, the body portion (428-1) may maintain a pressing force applied between the first connecting portion (410) and the second connecting portion (420) at a certain level.

[0085] In addition, when an external force is applied to the connecting portion (428-2), the distance between the plurality of main bodies (428-1) can be made larger or smaller than before the external force is applied. For example, when the connecting portion (428-2) is pressed to increase the distance between the two main bodies (428-1), the main bodies (428-1) that were inserted inwardly into the through-hole (426G) can be more easily ejected outward from the through-hole (426G). Meanwhile, when the external force on the connecting portion (428-2) is released, an elastic force is applied by the connecting portion (428-2) to reduce the distance between the plurality of main bodies (428-1), and thus the main bodies (428-1) can press between the first connecting portion (410) and the second connecting portion (420).

[0086] In one example, the assembly (428) may include a catch portion (428-3) that protrudes from an end of the main body portion (428-1) in a direction intersecting with the extended direction of the main body portion (428-1). For example, the extended direction of the main body portion (428-1) may be in the D1 direction, and the extended direction of the catch portion (428-3) may be in the D2 direction. In one example, the angle between the extended direction of the main body portion (428-1) and the extended direction of the catch portion (428-3) may be 90 degrees or less. Through this, the assembly (428) that presses the first connection portion (410) and the second connection portion (420) may be minimized from being separated from the penetration portion (426G).

[0087] In one example, the penetration portion (426G) may have a shape corresponding to that of the assembly (428). Specifically, the penetration portion (426G) may have a shape corresponding to that of the main body portion (428-1). The main body portion (428-1) may penetrate the second connection portion (420) through the penetration portion (426G) to apply pressure between the first connection portion (410) and the second connection portion (420). When the main body portion (428-1) passes through the penetration portion (426G), the clasp portion (428-3) may be hung on the outer wall of the second connection portion (420) to minimize separation of the assembly (428) from the penetration portion (426G).

[0088] In one example, the fixed coupling portion (426) may include a catch (430) arranged to come into contact with the handling portion (414D) when the first connecting portion (410) moves relative to the first connecting portion. In one example, the catch (430) may protrude from a surface facing the first connecting portion (410). In one example, when the first connecting portion (410) moves relative to the first connecting portion, if the handling portion (414D) comes into contact with the catch (430), the first connecting portion (410) is no longer inserted into the second connecting portion (420), thereby preventing the problem of the first connecting portion (410) being excessively inserted into the second connecting portion (420) and making it difficult to work in a narrow space.

[0089] In one example, the fixed connection portion (242) may include a fixing portion (432) arranged to come into contact with the first hook portion (414) when the first connection portion (410) moves relative to the first connection portion. In one example, the fixing portion (432) may be recessed from a surface facing the first connection portion (410). In one example, when the first connection portion (410) moves relative to the first connection portion, if the fixing portion (432) and the first hook portion (414) come into contact, the first connection portion (410) is no longer inserted into the second connection portion (420), thereby preventing the problem of the first connection portion (410) being excessively inserted into the second connection portion (420) and making it difficult to work in a narrow space. In one example, the second connection portion (420) may include a second connection portion (422) that does not overlap with the first connection portion (410) when the first connection portion (410) moves relative to the first connection portion. In one example, the second connecting portion (420) may include a second hook portion (424) mounted on the outer surface of the second connecting portion (422) and having a second protruding catch portion (424HS) protruding inwardly toward the second connecting portion (422).

[0090] In one example, each of the first coupling portion (412) and the second coupling portion (422) can be fluidly connected to the fluid path (300). In one example, each of the first coupling portion (412) and the second coupling portion (422) can be fluidly connected to the integrated connector (500). Furthermore, in one example, each of the first coupling portion (412) and the second coupling portion (422) can be fluidly connected to the first coupling portion (412) or the second coupling portion (422) of another connecting device (400). In one example, when the first connecting portion (410) is fluidly connected to a connecting object, such as the fluid path (300), the integrated connector (500), or another connecting device (400), at least a portion of the connecting object can enter between the first coupling portion (412) and the first hook portion (414) and be connected to at least a portion of the first coupling portion (412). In one example, the first protruding catch (414HS) presses the connection target that has entered between the first coupling portion (412) and the first hook portion (414) in the direction toward the first coupling portion (412) (i.e., in the D1 direction), thereby facilitating work in a narrow space and preventing the problem of cooling material leaking through superior coupling force.

[0091] In one example, the main flow direction of the cooling material passing through the first coupling portion (412) may be parallel to the main flow direction of the cooling material passing through the second coupling portion (422). In another example, the main flow direction of the cooling material passing through the first coupling portion (412) may intersect the main flow direction of the cooling material passing through the second coupling portion (422). In one example, the main flow direction of the cooling material passing through the first coupling portion (412) may be substantially perpendicular to the main flow direction of the cooling material passing through the second coupling portion (422).

[0092] In one example, the main flow direction of the cooling material passing through a portion of the first connection portion (410) that overlaps the second connection portion (420) during relative movement may be parallel to the main flow direction of the cooling material passing through the first joining portion (412) (see FIGS. 4 to 6).

[0093] In one example, the main flow direction of the cooling material passing through a portion of the first connection portion (410) that overlaps the second connection portion (420) during relative movement may be parallel to the main flow direction of the cooling material passing through the first connection portion (412) and intersect with the main flow direction of the cooling material passing through the second connection portion (422). In one example, the main flow direction of the cooling material passing through a portion of the first connection portion (410) that overlaps the second connection portion (420) during relative movement may be substantially perpendicular to the main flow direction of the cooling material passing through the second connection portion (422) (see FIGS. 7 to 12).

[0094] FIGS. 13 and 14 are perspective views schematically illustrating a connection device (400) of a battery device (10) according to one embodiment of the present application. FIG. 15 is a cross-sectional view illustrating a cross-section of a first coupling portion (412) according to one embodiment of the present application. FIG. 16 is an exploded perspective view schematically illustrating a connection device (400) of a battery device (10) according to one embodiment of the present application. FIGS. 17 and 18 are perspective views schematically illustrating a connection device (400) of a battery device (10) according to one embodiment of the present application. FIG. 19 is an exploded perspective view schematically illustrating a connection device (400) of a battery device (10) according to one embodiment of the present application.

[0095] The description of FIGS. 13 to 19 may refer to the description of FIGS. 1 to 12 unless there is a contradiction, and the following description will focus on the differences.

[0096] According to various embodiments, the first connecting portion (410) may include a first disc portion (415) disposed between the insertion space (420IA) and the first coupling portion (412) during relative movement.

[0097] In one example, the first disc portion (415) may have the shape of a circular plate, for example.

[0098] In one example, the first disc portion (415) may be positioned to at least partially overlap the insertion space (420IA) when viewed in the relative movement direction (e.g., in the D2 direction). The first disc portion (415) may have a cross-sectional area larger than the cross-sectional area of ​​the region overlapping the insertion space (420IA) when viewed in the relative movement direction (e.g., in the D2 direction). That is, for example, the first connecting portion (410) may be only partially inserted into the insertion space (420IA) by the first disc portion (415).

[0099] In addition, the first disk portion (415) may have a flat disk shape that does not have directionality in the direction of the rotation axis so that the first connection portion (410) can be smoothly inserted into the insertion space (420IA) to a set extent regardless of whether the first connection portion (410) is rotated partly about the rotation axis in the direction in which the first connection portion (410) moves relative to the insertion space (420IA) (for example, in the D2 direction).

[0100] In one example, the first disc portion (415) can be connected to the first hook portion (414).

[0101] Meanwhile, in one example, the first coupling portion (412) may have a shape in which the inner radius gradually decreases as it moves away from the second coupling portion (422) (i.e., in the +D2 direction) based on the relative movement direction (e.g., in the D2 direction) with respect to the second coupling portion (422) (see FIG. 15). For example, the first coupling portion (412) may have an inclined slope surface (412L). The inclined surface (412L) may mean a surface having a predetermined angle (Θ) based on the relative movement direction (e.g., in the D2 direction). The predetermined angle (Θ) may be, for example, greater than 0 degrees and less than 90 degrees. Through this, the coupling performance of the first coupling portion (412) can be improved.

[0102] In one example, the first connecting portion (410) may include a groove (410GR) in at least a portion of an area overlapping the second connecting portion (420) during relative movement. In addition, the first connecting portion (410) may include a groove (410GR) and a protrusion (410PJ) in at least a portion of an area overlapping the second connecting portion (420) during relative movement (see FIGS. 16 and 19). For example, the protrusion (410PJ) may allow the connecting body (428) to be fixed in position when the connecting body (428) passes through the through portion (426G) and presses between the first connecting portion (410) and the second connecting portion (420) to be connected. For example, the protrusion (410PJ) may be formed by the groove (410GR), but is not limited thereto.

[0103] In one example, the second connecting portion (420) may include a second disc portion (425) that is positioned between the insertion space (420IA) and the second connecting portion (422) when moving relative to each other. The second disc portion (425) may have the shape of a circular plate, for example. The first disc portion (415) and the second disc portion (425) may face each other.

[0104] In one example, the second disc portion (425) may be arranged to overlap the insertion space (420IA) when viewed in the relative movement direction (e.g., in the D2 direction). The second disc portion (425) may have a larger cross-sectional area than the cross-sectional area of ​​the region overlapping the insertion space (420IA) when viewed in the relative movement direction (e.g., in the D2 direction). The first disc portion (415) may allow the first connection portion (410) to be smoothly inserted into the insertion space (420IA) by a predetermined amount even when the second connection portion (420) rotates about the rotational axis in the relative movement direction (e.g., in the D2 direction) while the first connection portion (410) is inserted into the insertion space (420IA). In one example, the second disc portion (425) may be connected to the second hook portion (424).

[0105] In one example, the second connecting portion (420) may have a sealing portion (e.g., an O-ring (440O)) coupled to at least a portion of an area overlapping the first connecting portion (410) when moving relative to the second connecting portion (420). However, this is not limited thereto. Through this, when the first connecting portion (410) moves relative to the second connecting portion (420), the sealing characteristics of the first connecting portion (410) and the second connecting portion (420) can be improved.

[0106] In one example, the first connecting portion (410) may not be fully inserted into the insertion space (420IA), and thus the connecting device (400) may have a gap (GA) between the first connecting portion (410) and the second connecting portion (420). In addition, when the first connecting portion (410) includes the first disc portion (415), it may be preferable for the connecting device (400) to have a gap (GA) between the first connecting portion (410) and the second connecting portion (420). This allows the first connecting portion (410) to be smoothly inserted into the insertion space (420IA) by a predetermined amount while minimizing damage to the first connecting portion (410) and the second connecting portion (420).

[0107] FIG. 20 is a cross-sectional view schematically illustrating at least a portion of an area where a joint (428) according to one embodiment of the present application comes into contact with a first connection portion (410). Referring to FIG. 20 , in one example, the joint (428) may include a pin (428F) protruding from one surface. The pin (428F) may protrude in a direction toward the first connection portion (410) when the joint (428) passes through the penetration portion (426G) and presses against a portion of the first connection portion (410).

[0108] In one example, the first connector (410) may include a groove (410H) in at least a portion of the contact surface that contacts the assembly (428). The groove (410H) may be provided at a position corresponding to a pin (428F) of the assembly (428).

[0109] In one example, the pin (428F) of the assembly (428) and the groove (410H) of the first connection portion (410) may be interlocked with each other to form a pin-groove joint when the assembly (428) is connected to the first connection portion (410). Through this, the assembly (428) can stably prevent relative movement of the first connection portion (410) and the second connection portion (420) even when there is an external shock such as vibration. The number of each of the pins (428F) and the grooves (410H) is not particularly limited, and may be one or more.

[0110] Meanwhile, the assembly (428) may include a groove formed from one side, and the first connecting portion (410) may include a pin protruding in a direction toward the assembly (428) at a position corresponding to the groove formed in the assembly (428). Through this, when the assembly (428) is connected to the first connecting portion (410), they may interlock with each other to form a pin-groove connection.

[0111] In one example, the assembly (428) may include a wrinkle structure in at least a portion of the contact surface that comes into contact with the first connecting portion (410). In addition, the first connecting portion (410) may include a wrinkle structure in at least a portion of the contact surface that comes into contact with the assembly (428). Through this, the assembly (428) can stably prevent relative movement of the first connecting portion (410) and the second connecting portion (420) even when subjected to external shocks such as vibrations.

[0112] The battery device (10) according to one embodiment of the present application can be widely applied to green technology fields such as electric vehicles, battery charging stations, and other battery-based solar and wind power generation. Furthermore, the battery device (10) according to one embodiment of the present application can be applied to eco-friendly electric vehicles or hybrid vehicles, etc., which prevent climate change by suppressing air pollution and greenhouse gas emissions.

[0113] While various embodiments of the present application have been described in detail above, the scope of the present application is not limited thereto, and it will be apparent to those skilled in the art that various modifications and variations are possible without departing from the technical spirit of the present application as set forth in the claims. Furthermore, the above-described embodiments may be implemented by deleting some components, and the embodiments may be implemented in combination with each other.

[0114] [Explanation of symbols]

[0115] 10... Battery device

[0116] 100... battery assembly

[0117] 200... housing

[0118] 300... floating road

[0119] 400... connection device

[0120] 410... First connector

[0121] 420... Second connector

[0122] 500... Integrated connector

[0123] [Representative]

[0124] Fig. 3

Claims

1. Battery assembly; A housing accommodating the above battery assembly; A plurality of flow paths arranged between the battery assembly and the inner wall of the housing inside the housing and through which a cooling material flows to cool the heat generated from the battery assembly; and Including a connecting device for fluidly connecting at least some of the plurality of fluid paths, The connecting device includes a first connecting portion and a second connecting portion connected to the first connecting portion and coupled to the first connecting portion so as to be relatively movable within the housing. Battery device.

2. In paragraph 1, The above second connection part is, comprising an insertion space into which the first connecting portion can be at least partially inserted; Battery device.

3. In paragraph 2, The above first connection part is, At least partially including an area overlapping the second connecting portion during the relative movement; Battery device.

4. In paragraph 3, The above first connection part is, A first connecting portion that does not overlap with the second connecting portion during the relative movement; and Further comprising a first hook portion mounted on the outer surface of the first coupling portion and having a first protruding hook portion protruding inward toward the first coupling portion. Battery device.

5. In paragraph 4, The above first hook portion, It further includes a handling part that is formed to protrude in an outward direction opposite to the protruding direction of the first protruding catch part, The above handling part is formed to protrude so as not to overlap with the insertion space when viewed from the direction of relative movement. Battery device.

6. In paragraph 5, The second connecting portion further includes a fixed connecting portion having a penetration formed therein so that a portion of the first connecting portion inserted into the insertion space is exposed. Battery device.

7. In paragraph 6, The connecting device further includes a coupling member at least partially joined between the first connecting portion and the second connecting portion to prevent relative movement of the first connecting portion and the second connecting portion through the through-hole. Battery device.

8. In paragraph 6, The fixed joint further includes a catch portion that is arranged to protrude from a surface facing the first connecting portion and come into contact with the handling portion when the first connecting portion moves relative to the first connecting portion. Battery device.

9. In paragraph 6, The fixed connection part further includes a seating part arranged to be recessed from a surface facing the first connection part and to come into contact with the first hook part when the first connection part moves relative to the first connection part. Battery device.

10. In paragraph 4, The above first connection part is, Further comprising a first disc portion disposed between the insertion space and the first coupling portion during the relative movement and connected to the first hook portion; Battery device.

11. In paragraph 10, The first disc portion is arranged to at least partially overlap the insertion space when viewed from the direction of relative movement. Battery device.

12. In paragraph 11, The first disc portion has a cross-sectional area larger than the cross-sectional area of ​​the area overlapping the insertion space when viewed from the direction of relative movement. Battery device.

13. In paragraph 4, The above first connecting portion is, Having a slope inclined based on the direction of relative movement, Battery device.

14. In paragraph 4, The above first connection part is, Including a groove part in at least a part of the area overlapping the second connecting part during the relative movement, Battery device.

15. In paragraph 4, The above second connection part is, Including a second connecting portion that does not overlap with the first connecting portion during the relative movement, The main flow direction of the cooling material passing through the first joint is parallel to the main flow direction of the cooling material passing through the second joint. Battery device.

16. In paragraph 15, The above second connection part is, Further comprising a second hook portion mounted on the outer surface of the second connecting portion and having a second protruding hook portion protruding inward toward the second connecting portion. Battery device.

17. In paragraph 16, The main flow direction of the cooling material passing through a portion of the first connection part overlapping the second connection part during the above relative movement is parallel to the main flow direction of the cooling material passing through the first joint part. Battery device.

18. In paragraph 16, The above second connection part is, Further comprising a second disc portion disposed between the insertion space and the second connecting portion during the relative movement and connected to the second hook portion. Battery device.

19. In paragraph 4, The above second connection part is, Including a second connecting portion that does not overlap with the first connecting portion during the relative movement, The main flow direction of the cooling material passing through the first joint is substantially perpendicular to the main flow direction of the cooling material passing through the second joint. Battery device.

20. In paragraph 19, The main flow direction of the cooling material passing through a portion of the first connection portion that overlaps the second connection portion during the relative movement is parallel to the main flow direction of the cooling material passing through the first connection portion and substantially perpendicular to the main flow direction of the cooling material passing through the second connection portion. Battery device.

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