Battery assembly and battery pack

Abstract

The present application may provide a battery assembly comprising a plurality of battery cells and a cooling member interposed between the plurality of battery cells, wherein the cooling member comprises: a main body portion including a refrigerant flow path provided to allow a refrigerant to flow therein; an inlet portion communicating with the refrigerant flow path and provided to introduce the refrigerant; and an outlet portion communicating with the refrigerant flow path and provided to discharge the refrigerant, and the inlet portion and the outlet portion extend from one side of the main body portion corresponding to the venting direction of the plurality of battery cells.

Description

Battery assembly and battery pack

[0001] Cross-citation with related applications

[0002] This application is based on and claims the benefit of priority from Korean Patent Application Nos. 10-2023-0161350 and 10-2024-0146008, filed with the Korean Intellectual Property Office on November 20, 2023 and October 23, 2024, respectively, the entire contents of which are incorporated herein by reference.

[0003] Technology field

[0004] The present application relates to a battery assembly and a battery pack. Specifically, the present application relates to a battery assembly and a battery pack including the battery assembly.

[0005] Recently, demand for mobile devices such as smartphones, tablet PCs, and wireless earphones has been increasing. Furthermore, with the development of electric vehicles, energy storage batteries, robots, and satellites in full swing, research is actively underway on high-performance secondary batteries capable of repeated charging and discharging 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 numerous advantages compared to nickel-based batteries, including virtually no memory effect, free charging and discharging, a very low self-discharge rate, and high energy density.

[0007] High-performance secondary batteries can generate heat during operation. If this heat is not promptly disposed of, it can cause functional problems in the secondary battery, and the accumulated heat can also pose safety risks. Therefore, it is important to properly manage the heat generated during secondary battery operation.

[0008] The present application can provide a battery assembly and battery pack that can cool battery cells to minimize performance degradation or safety issues caused by heat. Furthermore, the present application can provide a battery assembly and battery pack that can simultaneously cool the battery cells and prevent or suppress problems caused by swelling. Furthermore, the present application can provide a battery assembly and battery pack that can more effectively cool the battery cells by appropriately utilizing space.

[0009] A battery assembly according to one embodiment of the present application includes a plurality of battery cells and a cooling member interposed between the plurality of battery cells, wherein the cooling member includes a main body portion including a coolant passage provided to allow coolant to flow therein, an inlet portion communicated with the coolant passage and provided to allow coolant to flow in, and an outlet portion communicated with the coolant passage and provided to allow coolant to flow out, wherein the inlet portion and the outlet portion may extend from one surface of the main body portion corresponding to a venting direction of the plurality of battery cells.

[0010] In a battery assembly according to one embodiment of the present application, the venting direction of the plurality of battery cells may correspond to the direction in which a venting hole is formed in a housing covering the plurality of battery cells so that venting gas generated from at least one of the plurality of battery cells is discharged.

[0011] In a battery assembly according to one embodiment of the present application, the plurality of battery cells include a first cell assembly and a second cell assembly, the first cell assembly and the second cell assembly each include two or more battery cells, and a cooling member may be provided between the first cell assembly and the second cell assembly.

[0012] In a battery assembly according to one embodiment of the present application, the first cell assembly and the second cell assembly each have a length (L) of a long side C ) and the length of the short side (LT ) ratio (L C / L T ) may be 1 to 100, or each battery capacity may be 50 Ah to 1,000 Ah.

[0013] In a battery assembly according to one embodiment of the present application, the main body may further include a gas pocket.

[0014] In a battery assembly according to one embodiment of the present application, the inlet and outlet portions may extend in the same direction from one surface of the main body portion.

[0015] In a battery assembly according to one embodiment of the present application, the inlet and outlet portions may protrude beyond one surface of a plurality of battery cells positioned parallel to one surface of the main body portion.

[0016] In a battery assembly according to one embodiment of the present application, a plurality of cooling members are provided, and the inlet portions of each of the plurality of cooling members may be arranged in a row so that at least some of them face each other, and the outlet portions of each of the plurality of cooling members may be arranged in a row so that at least some of them face each other.

[0017] In a battery assembly according to one embodiment of the present application, at least a portion of the cooling member may be in contact with an adjacent battery cell.

[0018] In a battery assembly according to one embodiment of the present application, the cooling member may include an elastic material.

[0019] In a battery assembly according to one embodiment of the present application, a coolant flowing in a coolant passage can absorb heat generated from at least some of a plurality of battery cells.

[0020] A battery assembly according to one embodiment of the present application includes a housing that accommodates a plurality of battery cells and a cooling member interposed between the plurality of battery cells, wherein the cooling member includes a main body including a coolant passage provided to allow coolant to flow therein, an inlet portion that is communicated with the coolant passage and provided to allow coolant to flow in, and an outlet portion that is communicated with the cooling coolant passage and provided to allow coolant to flow out, and the housing may include a first hole provided on one surface through which at least a portion of the inlet portion passes, and a second hole provided on one surface through which at least a portion of the outlet portion passes.

[0021] In a battery assembly according to one embodiment of the present application, a cover member covering at least a portion of the housing may be further included.

[0022] In a battery assembly according to one embodiment of the present application, the first hole and the second hole may be provided on the same side of the housing.

[0023] In a battery assembly according to one embodiment of the present application, the housing may further include a third hole different from the first hole and the second hole.

[0024] A battery pack according to one embodiment of the present application includes a battery assembly including a plurality of battery cells and a cooling member interposed between the plurality of battery cells, a pack housing defining a receiving space for accommodating the battery assembly, a coolant inlet pipe for introducing coolant into the battery assembly, and a coolant outlet pipe for discharging the introduced coolant to the outside, wherein the cooling member includes a main body including a coolant passage provided to allow coolant to flow therein, an inlet portion communicated with the coolant passage and provided to allow coolant to be introduced, and an outlet portion communicated with the coolant passage and provided to allow coolant to be discharged, wherein the coolant passage may be communicated with the coolant inlet pipe and the coolant outlet pipe.

[0025] In a battery pack according to one embodiment of the present application, a plurality of battery assemblies are provided, and a refrigerant passage of one of the plurality of battery assemblies and a refrigerant passage of another of the plurality of battery assemblies can be connected to each other through at least one of a refrigerant inlet pipe and a refrigerant outlet pipe.

[0026] In a battery pack according to one embodiment of the present application, the pack housing includes a pack outer wall frame surrounding at least a portion of a battery assembly and a pack support frame supporting the battery assembly accommodated in the accommodation space, and the inlet and outlet portions may extend from one side of the main body portion corresponding to the venting direction of a plurality of battery cells, and the inlet and outlet portions may be provided in a space formed between the battery assembly and the pack support frame.

[0027] A battery pack according to one embodiment of the present application further includes a mounting surface provided for mounting a battery assembly, the mounting surface being connected to an outer wall frame and including a first mounting surface hole through which at least a portion of an inlet portion is provided to pass through and a second mounting surface hole through which at least a portion of an outlet portion is provided to pass through, wherein the mounting surface may be spaced apart from the pack support frame by a predetermined distance.

[0028] In a battery pack according to one embodiment of the present application, the mounting surface may further include a third mounting surface hole that is different from the first mounting surface hole and the second mounting surface hole.

[0029] The present invention can minimize performance degradation or safety issues caused by heat by cooling battery cells. Furthermore, the present invention can simultaneously prevent or suppress problems caused by swelling while cooling the battery cells. Furthermore, the present invention can more effectively cool battery cells by appropriately utilizing space.

[0030] The drawings shown in this application are according to examples of this application, and the ratios of width, width, or thickness (or height) of each component are for the purpose of explaining the present disclosure 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.

[0031] FIG. 1 is a perspective view illustrating at least a portion of a battery assembly according to an example of the present application.

[0032] FIG. 2 is a perspective view illustrating at least a portion of a plurality of cooling members according to an example of the present application.

[0033] FIG. 3 is a cross-sectional view (YZ plane) showing at least a portion of a cooling member according to an example of the present application.

[0034] FIGS. 4 to 6 are cross-sectional views taken along line A-A' of FIG. 2, respectively, showing at least a portion of a cooling member according to an example of the present application (XZ plane).

[0035] FIG. 7 is a cross-sectional view (XZ plane) illustrating at least a portion of a battery assembly according to an example of the present application.

[0036] FIG. 8 is an exploded perspective view illustrating at least a portion of a battery assembly according to an example of the present application.

[0037] FIG. 9 is a perspective view illustrating at least a portion of a battery assembly according to an example of the present application.

[0038] FIG. 10 is an exploded perspective view illustrating at least a portion of a battery assembly according to an example of the present application.

[0039] FIG. 11 is a perspective view illustrating at least a portion of a battery assembly according to an example of the present application.

[0040] Figures 12 and 13 are enlarged views of portion P of Figure 10.

[0041] FIG. 14 is an exploded perspective view illustrating at least a portion of a battery pack according to an example of the present application.

[0042] FIG. 15 is a perspective view showing at least a portion of a battery pack according to an example of the present application, showing refrigerant piping.

[0043] FIG. 16 is a cross-sectional view (XY plane) showing at least a portion of a battery pack according to an example of the present application, showing refrigerant piping.

[0044] FIG. 17 is a perspective view showing a lower portion of at least a portion of a battery pack according to an example of the present application.

[0045] FIG. 18 is a perspective view showing at least a portion of a battery pack according to an example of the present application, showing refrigerant piping.

[0046] FIG. 19 is a cross-sectional view (XY plane) showing at least a portion of a battery pack according to an example of the present application, showing refrigerant piping.

[0047] FIG. 20 is a perspective view showing at least a portion of a battery pack according to an example of the present application, showing refrigerant piping.

[0048] FIG. 21 is a cross-sectional view (XY plane) showing at least a portion of a battery pack according to an example of the present application, showing refrigerant piping.

[0049] FIG. 22 is a perspective view illustrating at least a portion of a battery pack according to an example of the present application.

[0050] FIG. 23 is a perspective view showing at least a portion of a battery pack according to an example of the present application, showing that a cross member is provided.

[0051] FIG. 24 is a perspective view showing at least a portion of a battery pack according to an example of the present application, showing a mounting surface of the battery pack.

[0052] FIG. 25 is a cross-sectional view (YZ plane) showing at least a portion of a battery pack according to an example of the present application, showing that auxiliary members are provided.

[0053] FIG. 26 is a perspective view showing an auxiliary member in a battery pack according to an example of the present application.

[0054] FIG. 27 is an exploded perspective view illustrating at least a portion of a battery assembly according to an example of the present application.

[0055] FIG. 28 is a perspective view showing at least a portion of a battery pack according to an example of the present application, showing a mounting surface of the battery pack.

[0056] FIG. 29 is a cross-sectional view (XY plane) showing at least a portion of a battery assembly according to an example of the present application, showing a portion of a housing.

[0057] FIG. 30 is a drawing illustrating at least a portion of a battery pack according to an example of the present application, taken along line B-B' of FIG. 29.

[0058] FIG. 31 is a cross-sectional view (XZ plane) showing at least a portion of a battery pack according to an example of the present application, showing that auxiliary members are provided.

[0059] 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 accordance with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concepts of terms 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 spirit of this application. Therefore, various equivalents and variations may exist at the time of filing of this application.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 are 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 restricted manner, such as in the order of use or arrangement, based on their numbers. If necessary, each ordinal number may be used interchangeably.

[0064] Hereinafter, embodiments of the present application will be described in detail with reference to the attached drawings. However, the scope of the present application may not be limited to the presented embodiments. For example, those skilled in the art who understand the scope of the present application may propose other embodiments within the scope of the present application by adding, modifying, or deleting components, but such embodiments will also be considered within the scope of the present application. The shapes and sizes of elements in the drawings may be exaggerated for clarity.

[0065] 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.

[0066] The Si unit system may be used unless specifically limited in this specification.

[0067] The term room temperature used herein refers to a natural temperature that is not heated or cooled, and may mean, for example, any temperature within the range of 10°C to 30°C, for example, a temperature that is about 15°C or higher, about 18°C ​​or higher, about 20°C or higher, about 23°C or higher, about 27°C or lower, or 25°C. Unless specifically defined herein, the unit of temperature is Celsius (°C).

[0068] FIG. 1 is a perspective view illustrating at least a portion of a battery assembly (10) according to an example of the present application. FIG. 14 is an exploded perspective view illustrating at least a portion of a battery pack (1) according to an example of the present application.

[0069] The present application can provide a battery assembly (10) and a battery pack (1) that can cool a battery cell (100) to minimize performance degradation or safety issues caused by heat.

[0070] The present application can provide a battery assembly (10) and a battery pack (1) that can prevent or suppress problems caused by swelling while simultaneously cooling a battery cell (100).

[0071] The present application can provide a battery assembly (10) and a battery pack (1) that can more effectively perform cooling of a battery cell (100) by appropriately utilizing space.

[0072] Meanwhile, the term battery assembly (10) used in this specification is sufficient if it includes a plurality of battery cells (100), and may include a stack of battery cells (100) in which battery cells (100) are stacked, and may be a concept including a so-called battery module in which one or more battery cells (100) are built into a housing (10A, see FIG. 10) to prevent or suppress external impact.

[0073] A battery assembly (10) according to an example of the present application may include a plurality of battery cells (100). The battery cells (100) may include a cell assembly (110) and a cell tab (120) protruding from the cell assembly (110).

[0074] In one example, the cell assembly (110) may include an electrode within the outer shell. For example, the electrode may include one or more of a cathode and an anode.

[0075] For example, the cathode refers to a reduction electrode to which an electron transport material transfers electrons when the battery cell (100) is discharged, and the anode refers to an oxidation electrode to which an electron transport material transfers electrons when the battery cell (100) is discharged. The electron transport material is lithium ion (Li + ) or sodium ion (Na + ) may be.

[0076] In one example, the cell tab (120) may be provided according to the number of electrodes provided in the cell assembly (110) and may be electrically connected to each electrode. For example, the cell tab (120) may include an anode cell tab (120) electrically connected to an anode within the cell assembly (110) and an cathode cell tab (120) electrically connected to an anode within the cell assembly (110).

[0077] For example, the positive cell tab (120) and the negative cell tab (120) may protrude in the same direction, or may protrude in different directions, for example, may protrude in opposite directions (about 180 degrees) from each other.

[0078] As used herein, "electrically connected" may refer to a state in which, when objects to be connected are connected by a connecting means, an electrical circuit is formed, allowing current to flow between each connected object. The connecting means is not particularly limited as long as it allows for electrical connection, but may include direct contact between the objects to be connected or a wire capable of carrying current.

[0079] In one example, the battery cell (100) may be classified into types according to the shape of the cell assembly (110). For example, the battery cell (100) may be classified into a square shape, a cylindrical shape, a coin shape, or a pouch shape according to the shape of the cell assembly (110). The battery cell (100) of the present application may be suitably of a pouch shape, but this is merely an exemplary description, and the various embodiments of the present disclosure are not limited to a specific type.

[0080] In one example, the interior of the cell assembly (110) may include a separator that can prevent or suppress short circuiting of the positive and negative electrodes and allow electron transport materials to pass through. The electron transport materials may be, for example, lithium ions (Li + ) or sodium ion (Na + ) may be.

[0081] In one example, the interior of the cell assembly (110) may contain an electrolyte. The electrolyte may be liquid or solid at room temperature. If the electrolyte is liquid at room temperature, the electrolyte may be referred to as an electrolyte solution. The electrolyte solution may be filled within the cell assembly (110) and may serve as a medium that facilitates the movement of electron transport substances.

[0082] For example, if the electrolyte is solid at room temperature, the electrolyte may be referred to as a solid electrolyte. The solid electrolyte may be provided as a layer-like solid electrolyte layer between the positive and negative electrodes, in which case the solid electrolyte layer may also function as the aforementioned separator.

[0083] In a battery assembly (10) according to an example of the present application, at least some of the plurality of battery cells (100) may be stacked in one direction.

[0084] For example, referring to FIG. 1, at least some of the plurality of battery cells (100) may be stacked in the x-axis direction. At least some of the plurality of battery cells (100) may be stacked to improve spatial efficiency.

[0085] In one example, the stacked battery cells (100) may be positioned so that their respective stacking surfaces (111) face each other.

[0086] A battery assembly (10) according to an example of the present application may include a cooling member (200) interposed between a plurality of battery cells (100). If the cooling member (200) is interposed between a plurality of battery cells (100), its position is not particularly limited.

[0087] In one example, the cooling member (200) may be arranged not only between the plurality of battery cells (100), but also to surround a portion of the battery cell (100) located at the outermost end among the plurality of battery cells (100).

[0088] For example, the cooling member (200) may be arranged to surround a portion of the outermost battery cell (100) so as to distinguish the outermost battery cell (100) from the outside.

[0089] In one example, at least a portion of the cooling member (200) may be in contact with an adjacent battery cell (100). When at least a portion of the cooling member (200) is in contact with an adjacent battery cell (100), the battery cell (100) can be cooled more effectively while preventing or suppressing problems caused by swelling.

[0090] In a battery assembly (10) according to an example of the present application, a plurality of battery cells (100) include a first cell assembly (100A) and a second cell assembly (100B), and the first cell assembly (100A) and the second cell assembly (100B) may each include two or more battery cells (100).

[0091] Meanwhile, the first cell assembly (100A) and the second cell assembly (100B) may each be at least partially stacked in one direction. In the battery assembly (10), a cooling member (200) may be interposed between the first cell assembly (100A) and the second cell assembly (100B). Through this, the battery cell (100) can be cooled while simultaneously preventing or suppressing problems caused by swelling.

[0092] In an embodiment, the battery assembly (10) may be composed of a plurality of cell assemblies, including a first cell assembly (100A) and a second cell assembly (100B), according to a predetermined standard.

[0093] For example, each cell assembly has a length (L) of its major side C ) and the short edge (or, laminated edge) (L T ) can be configured to have a predetermined ratio in length. In one example, the first cell assembly (100A) and the second cell assembly (100B) have a length (L) of the long sideC ) and the length of the short side (L T ) ratio (L C / L T ) may be 1 to 100, 5 to 80, 8 to 70, 10 to 60, 12 to 50, 14 to 40 or 16 to 35.

[0094] For example, each cell assembly can be independently configured to satisfy a battery capacity range condition. In one example, the first cell assembly (100A) and the second cell assembly (100B) can each have a battery capacity of 50 Ah to 1,000 Ah, 70 Ah to 900 Ah, 80 Ah to 800 Ah, 90 Ah to 700 Ah, 100 Ah to 600 Ah, 110 Ah to 550 Ah, 120 Ah to 500 Ah, 130 Ah to 450 Ah, 140 Ah to 400 Ah, or 150 to 350 Ah.

[0095] In one example, the first cell assembly (100A) and the second cell assembly (100B) each have a length (L) of their long sides. C ) and the length of the short side (L T ) ratio (L C / L T ) 1 to 100, 5 to 80, 8 to 70, 10 to 60, 12 to 50, 14 to 40 or 16 to 35, or each battery capacity may be 50 Ah to 1,000 Ah, 70 Ah to 900 Ah, 80 Ah to 800 Ah, 90 Ah to 700 Ah, 100 Ah to 600 Ah, 110 Ah to 550 Ah, 120 Ah to 500 Ah, 130 Ah to 450 Ah, 140 Ah to 400 Ah or 150 to 350 Ah.

[0096] In a battery assembly (10) according to an example of the present application, a plurality of cooling members (200) may be provided.

[0097] For example, among the plurality of cooling members (200), at least some may be interposed between the plurality of battery cells (100), and other parts may be arranged to surround a portion of a battery cell (100) located at the outermost end among the plurality of battery cells (100).

[0098] In one example, at least some of the plurality of cooling members (200) may be interposed between the first cell assembly (100A) and the second cell assembly (100B).

[0099] Fig. 2 is a perspective view illustrating at least a portion of a plurality of cooling members (200) according to an example of the present application. Fig. 3 is a cross-sectional view illustrating at least a portion of a cooling member (200) according to an example of the present application (YZ plane). Figs. 4 to 6 are cross-sectional views taken along line A-A' of Fig. 2, respectively, illustrating at least a portion of a cooling member (200) according to an example of the present application (XZ plane). Fig. 7 is a cross-sectional view illustrating at least a portion of a battery assembly (10) according to an example of the present application (XZ plane).

[0100] In a battery assembly (10) according to an example of the present application, the cooling member (200) may include a coolant passage (212) provided so that a coolant may flow therein. The cooling member (200) may include a gas pocket (213) provided on at least one side of the coolant passage (212) and separated from the coolant passage (212) by a partition (214).

[0101] For example, the cooling member (200) includes a coolant passage (212) and a gas pocket (213) provided to allow the coolant to flow, thereby cooling the battery cell (100) and preventing or suppressing problems caused by swelling.

[0102] For example, the coolant flowing in the coolant path (212) can absorb heat generated from the battery cell (100), thereby preventing or suppressing the problem of the battery cell (100) from overheating.

[0103] For example, the gas pocket (213) can prevent or suppress problems caused by swelling by pressurizing at least a portion of the battery cell (100) so that the battery cell (100) is not damaged when swelling occurs in the battery cell (100).

[0104] In a battery assembly (10) according to an example of the present application, the cooling member (200) may include an elastic material.

[0105] For example, if the cooling member (200) includes an elastic material, it may be more advantageous to prevent or suppress problems caused by swelling by pressurizing at least a portion of the battery cell (100) so that the battery cell (100) is not damaged when swelling occurs in the battery cell (100).

[0106] In the embodiment, the elastic material is not particularly limited, but materials known in the art to have appropriate elasticity, such as silicone resin and urethane resin, can be used.

[0107] The refrigerant in this specification is not particularly limited to any substance that causes a cooling effect and is used as a refrigerant in the art. For example, the refrigerant may be water, ammonia, freon gas, or methyl chloride. The refrigerant flowing in the refrigerant passage (212) can absorb heat generated from at least some of the plurality of battery cells (100).

[0108] In a battery assembly (10) according to an example of the present application, a cooling member (200) may include a main body (210) including a refrigerant passage (212), an inlet (220) that is connected to the refrigerant passage (212) and configured to allow refrigerant to flow in, and an outlet (230) that is connected to the refrigerant passage (212) and configured to allow refrigerant to flow out. In one example, the inlet (220) may include an inlet passage (221) that is connected to the refrigerant passage (212), and the refrigerant may flow in the inlet passage (221). In one example, the outlet (230) may include an outlet passage (231) that is connected to the refrigerant passage (212), and the refrigerant may flow in the outlet passage (231).

[0109] In one example, the main body (210) may include a gas pocket (213).

[0110] In a battery assembly (10) according to an example of the present application, a cooling member (200) may have a coolant passage (212) provided therein.

[0111] For example, the refrigerant passage (212) may not be sealed in order to supply refrigerant from the outside of the cooling member (200) or discharge refrigerant to the outside. That is, the refrigerant passage (212) may be in communication with the outside of the cooling member (200).

[0112] In a battery assembly (10) according to an example of the present application, the refrigerant passage (212) may be in communication with the inlet (220) (e.g., the inlet path (221) of the inlet (220)).

[0113] For example, the refrigerant passage (212) may be in communication with the outlet (230) (e.g., the outlet passage (231) of the outlet (230)).

[0114] The refrigerant can be introduced from the outside of the cooling member (200) into the inside of the cooling member (200) through the inlet passage (221).

[0115] For example, refrigerant introduced into the inlet passage (221) can move along the refrigerant passage (212) provided in the main body (210).

[0116] The refrigerant passing through the refrigerant passage (212) can flow out of the cooling member (200) through the outlet passage (231). For example, the refrigerant can be introduced into the cooling member (200) or flowed out through a power supply device such as a pump.

[0117] In a battery assembly (10) according to an example of the present application, the coolant path (212) can be appropriately designed.

[0118] For example, in order for the refrigerant to effectively absorb the heat generated from the battery cell (100), the refrigerant passage (212) may form a path that reciprocates between one end and the other end of the cooling member (200) multiple times to increase the surface area of ​​the refrigerant passage (212). For example, the refrigerant passage (212) may be in a form in which the refrigerant passage (212) extends once from one end to the other end of the cooling member (200) so that the refrigerant passage (212) forms a single space based on a cross-section, as in the embodiments of FIGS. 4 to 6. However, the shape of the refrigerant passage (212) is not particularly limited.

[0119] In one example, a refrigerant having a relatively low temperature may be supplied to the cooling member (200) through the inlet passage (221). The refrigerant supplied to the inlet passage (221) flows along the refrigerant passage (212) of the main body (210), and the refrigerant flowing along the refrigerant passage (212) may absorb heat generated from at least some of the plurality of battery cells (100). The refrigerant flowing along the refrigerant passage (212) gradually increases in temperature, and the refrigerant flowing out through the outlet passage (231) may have a higher temperature than the refrigerant supplied through the inlet passage (221). That is, the temperature of the refrigerant moving in the inlet passage (221) may be equal to or lower than the temperature of the refrigerant moving in the outlet passage (231), and preferably may be lower.

[0120] In a battery assembly (10) according to an example of the present application, a cooling member (200) may have a gas pocket (213) provided therein.

[0121] For example, the gas pocket (213) may be sealed so as not to communicate with the outside of the cooling member (200). That is, the gas pocket (213) may be a sealed space.

[0122] For example, the gas pocket (213) may be provided with a substance that is a gas at room temperature. The substance that is a gas at room temperature may include, but is not limited to, one or more selected from the group consisting of hydrogen (H2), helium (He), nitrogen (N2), and air (Air).

[0123] Meanwhile, the cooling member (200) may be manufactured by an injection molding process, but is not limited thereto. For example, the gas pocket (213) may be formed by injecting a gaseous substance at room temperature into a sealed space prepared while manufacturing the cooling member (200) by an injection molding process, or by naturally flowing into the sealed space in an environment where a gaseous substance at room temperature exists.

[0124] In a battery assembly (10) according to an example of the present application, the cooling member (200) may include a body portion (211) that determines the shape.

[0125] For example, in the cooling member (200), the refrigerant passage (212) and the gas pocket (213) may be separated by a partition wall (214). For example, the partition wall (214) may be a part of the body portion (211) or may be connected to the body portion (211).

[0126] For example, the bulkhead (214) and the body part (211) may be connected to each other through a connecting means such as a joint (bolt or nut, etc.), adhesion, or welding.

[0127] In a battery assembly (10) according to an example of the present application, the coolant passing through the coolant passage (212) may not move to the gas pocket (213) due to the partition wall (214). In addition, a gaseous substance contained in the gas pocket (213) may not move to the coolant passage (212) due to the partition wall (214). That is, the partition wall (214) may physically separate the coolant passage (212) and the gas pocket (213) and spatially separate them.

[0128] In a battery assembly (10) according to an example of the present application, if the cooling member (200) includes a coolant passage (212) provided to allow coolant to flow therein, or includes a gas pocket (213) separated from the coolant passage (212) by a coolant passage (212) and a partition wall (214), the positions and shapes of the coolant passage (212) and the gas pocket (213) are not particularly limited.

[0129] Figures 4 to 6 are cross-sectional views of a portion of a main body (210) of a cooling member (200). In the cross-section of the main body (210), there may be one or more refrigerant passages (212). In addition, in the cross-section of the main body (210), there may be one or more gas pockets (213).

[0130] Referring to Fig. 4, in the cross-section of the main body (210), there may be one refrigerant passage (212) and a plurality of gas pockets (213). In addition, the refrigerant passage (212) may be formed in the central (x-axis) region of the main body (210) in the cooling member (200), and gas pockets (213) separated by the refrigerant passage (212) and a partition wall (214) may be formed on both sides of the main body (210). The gas pockets (213) provided on each side can effectively respond to swelling of each battery cell (100) provided adjacently.

[0131] In one example, the gas injected into the gas pocket (213) may be air, but may also be a gas having a higher thermal conductivity than air, if necessary. For example, the gas provided in the gas pocket (213) may include at least one of hydrogen (H2), helium (He), and nitrogen (N2). A gas having a high thermal conductivity can minimize the effect of interfering with the heat exchange between the refrigerant in the refrigerant passage (212) and the battery cell (100).

[0132] In one example, the coolant can transfer heat to the battery cell (100) through the body portion (211) and through the gas within the body portion (211) and the gas pocket (213).

[0133] Referring to Fig. 5, in the cross-section of the main body (210), there may be a plurality of coolant passages (212) and a single gas pocket (213). In addition, a gas pocket (213) may be formed in the central (x-axis) region of the main body (210) in the cooling member (200), and a coolant passage (212) may be formed on both sides of the main body (210) separated by a gas pocket (213) and a partition wall (214). Since the gas pocket (213) is provided on the inside of the cooling member (200) and the coolant passage (212) is provided on the outside of the cooling member (200), the gas of the gas pocket (213) can be minimized from interfering with heat transfer between the coolant and the battery cell (100), thereby enabling efficient cooling. In addition, the gas pocket (213) positioned at the center of the cooling member (200) and the gas provided therein can attenuate the heat generated from the battery cell (100) on one side of the cooling member (200) from being transferred to the battery cell (100) on the other side of the cooling member (200). To this end, the gas provided inside the gas pocket (213) may be a material with low thermal conductivity, for example, air.

[0134] Referring to Fig. 6, in the cross-section of the main body (210), the refrigerant passage (212) and the gas pocket (213) may each be one. In addition, in the cooling member (200), the refrigerant passage (212) is provided on one side (e.g., left) of the main body (210), and the gas pocket (213) is provided on the other side (e.g., right), and the refrigerant passage (212) and the gas pocket (213) may be separated by a partition (214).

[0135] In one example, the coolant of the coolant passage (212) provided on one side can effectively transfer heat to the battery cell (100) positioned adjacent to one side of the cooling member (200), and the gas pocket (213) provided on the other side can effectively respond to swelling of the battery cell (100) positioned adjacent to the other side of the cooling member (200).

[0136] For example, if cooling members (200) of this structure are respectively arranged on both sides of a specific battery cell (100), the heat generation of the battery cell (100) can be mainly responded to by the cooling member (200) on one side, and the swelling of the battery cell (100) can be mainly responded to by the cooling member (200) on the other side. In this case, since at least one side of the both sides of the battery cell (100) can directly face the coolant passage (212), the problem of heat transfer efficiency being reduced by the gas pocket (213) can be prevented or suppressed.

[0137] In addition, although not separately illustrated, the cross-section of the main body (210) may be provided with a plurality of refrigerant passages (212) and / or gas pockets (213). For example, the arrangement of FIG. 6 may be repeated in the horizontal direction, or may have a pattern (e.g., FIG. 3) that is repeated in the vertical direction. Such a plurality of configuration arrangements allows the bulkheads (214) to be provided more densely, which may reinforce the rigidity of the cooling member (200) from being weakened due to the space formed by the refrigerant passages (212) and gas pockets (213).

[0138] In a battery assembly (10) according to an example of the present application, the inlet (220) and the outlet (230) of the cooling member (200) may be spaced apart from each other. The inlet (220) and the outlet (230) may be spaced apart from each other with a predetermined gap in order to design a space-efficient path for supplying or discharging a coolant from the outside of the cooling member (200). The predetermined gap between the inlet (220) and the outlet (230) is not specifically determined and may be determined according to the design of the inlet (220) and the outlet (230).

[0139] In a battery assembly (10) according to an example of the present application, the inlet (220) and outlet (230) of the cooling member (200) may protrude from the main body (210). One side of the main body (210) where the inlet (220) is provided and one side of the main body (210) where the outlet (230) is provided may be the same. In addition, the protruding direction of the inlet (220) and the protruding direction of the outlet (230) may be the same. Alternatively, the inlet (220) and outlet (230) may be provided on two different sides of the main body (210), and their respective protruding directions may also be different.

[0140] In one example, the cooling member (200) can utilize space efficiently by having the aforementioned structure, thereby enabling more effective cooling of the battery cell (100). In addition, through the cooling member (200), the battery cell (100) can be cooled while simultaneously preventing or suppressing problems caused by swelling.

[0141] In a battery assembly (10) according to an example of the present application, the inlet (220) and outlet (230) of the cooling member (200) may extend from one side of the main body (210) corresponding to the venting direction of the plurality of battery cells (100). In one example, the inlet (220) and outlet (230) may extend from a protruding surface (215) which is one side of the main body (210). The protruding surface (215) may refer to one side of the main body (210) on which the protruding inlet (220) and outlet (230) are provided.

[0142] In one example, the inlet (220) and outlet (230) of the cooling member (200) may extend in the same direction from one surface of the main body (210). In one example, the inlet (220) and outlet (230) may extend in the same direction from the protruding surface (215). Referring to FIG. 7, the inlet (220) may extend in the -z-axis direction and the outlet (230) may extend in the -z-axis direction.

[0143] In one example, the inlet (220) and outlet (230) of the cooling member (200) may protrude further than one side of the main body (210) and one side of the plurality of battery cells (100) positioned parallel to each other. In one example, the inlet (220) and outlet (230) may protrude further than the first surface (130) of the plurality of battery cells (100) positioned parallel to the protruding surface (215). In this way, when the inlet (220) and outlet (230) protrude further than one side of the main body (210) and one side of the plurality of battery cells (100), space can be efficiently utilized, and thus cooling of the battery cells (100) can be performed more effectively. Specific details thereof will be described later.

[0144] FIG. 8 is an exploded perspective view illustrating at least a portion of a battery assembly (10) according to an example of the present application. In one example, the battery assembly (10) may include a busbar assembly (300). The busbar assembly (300) may include a busbar electrically connected to a cell tab (120) of a battery cell (100) and a busbar supporter supporting the busbar. The cell tab (120) may be welded to the busbar, and by welding, the cell tab (120) and the busbar may be electrically connected. The busbar may include an insertion hole into which the cell tab (120) may be inserted. Although FIG. 8 illustrates that the busbar assembly (300) is connected to only one cell tab (120), the size and number of the busbar assembly (300) may be determined depending on the number and protruding direction of the cell tabs (120) of the battery cell (100).

[0145] In a battery assembly (10) according to an example of the present application, at least some of the plurality of battery cells (100) may be stacked side by side in one direction. For example, by stacking at least some of the plurality of battery cells (100) side by side in one direction, the cell tabs (120) of each battery cell (100) may protrude in the same direction and each cell tab (120) may be arranged side by side. This arrangement can improve spatial efficiency and facilitate the design of the busbar assembly (300).

[0146] A battery assembly (10) according to an example of the present application may include a plurality of battery cells (100) and a cooling member (200) interposed between the plurality of battery cells (100). In addition, the cooling member (200) may include an inlet (220) and an outlet (230, not shown) protruding from a main body (210).

[0147] FIG. 9 is a perspective view illustrating at least a portion of a battery assembly (10) according to an example of the present application. In one example, the battery assembly (10) may include a plurality of cooling members (200). The inlet portions (220) of each of the plurality of cooling members (200) may be arranged in a row such that at least a portion thereof faces each other. The outlet portions (230) of each of the plurality of cooling members (200) may be arranged in a row such that at least a portion thereof faces each other.

[0148] In a battery assembly (10) according to an example of the present application, at least some of the plurality of battery cells (100) may be stacked side by side in one direction. In the battery assembly (10), a plurality of cooling members (200) may be interposed between the plurality of battery cells (100), and at least some of the plurality of battery cells (100) may be stacked along one direction.

[0149] For example, the inlet portions (220) of each of the plurality of cooling members (200) may be arranged in a row such that at least a portion thereof faces each other, and the outlet portions (230) of each of the plurality of cooling members (200) may be arranged in a row such that at least a portion thereof faces each other. Through this, a path for supplying or discharging refrigerant from the outside of the cooling member (200) may be designed in a space-efficient manner.

[0150] Meanwhile, each battery cell (100) may include two laminated surfaces (111) and a side surface part connecting the boundaries of the two laminated surfaces (111), and the side part may be composed of a combination of at least one long side surface and at least one short side surface.

[0151] In one example, among the plurality of rectangular faces forming the side surface of the battery cell (100), i.e., faces having a shape in which the relative length in a specific direction is significantly longer than in other directions, a 'long side surface' may be defined as a face whose longitudinal length is longer than the average longitudinal length of the plurality of faces of the side surface of the battery cell (100), and a 'short side surface' may be defined as a face whose longitudinal length is shorter than or equal to the average longitudinal length of the plurality of faces of the side surface of the battery cell (100).

[0152] In one example, with respect to the battery assembly (10), the protruding surface (215) provided with the inlet (220) and outlet (230) in the cooling member (200) may correspond to the long side of the battery cell (100). Here, 'corresponding' may mean that the direction that the protruding surface (215) in the assembly (10) mainly faces and the direction that the long side of the battery cell (100) mainly faces are substantially the same.

[0153] If the direction in which the long side of the battery cell (100) corresponding to the protruding surface (215) faces is the venting direction (at least intended) of the battery cell (100), in this case, the inlet (220) and outlet (230) of the cooling member (200) are provided in the space provided for venting in the battery assembly (10), so that it is possible to achieve the effect of eliminating the need to secure a separate space for providing the inlet (220) or outlet (230). In addition, since the area near the inlet (220) and outlet (230) has a higher density of refrigerant than other areas, it can also contribute to suppressing the thermal propagation phenomenon due to cooling when an event occurs.

[0154] Referring to FIGS. 7 and 9, the hexahedral assembly (10) may be configured such that the long sides of the battery cells (100) are positioned on the upper and lower sides, and the short sides of the battery cells (100) are positioned on the side. For example, the protruding surface (215) may correspond to the long side positioned on the lower side of the battery cells (100).

[0155] In one example, the battery cell (100) may have a bottom venting structure. The protruding surface (215) having the inlet (220) and outlet (230) may correspond to the venting direction of the battery cell (100). The protruding surface (215) may face the lower side of the assembly (10) so as to correspond to the venting direction.

[0156] For example, the venting direction of the battery cell (100) may mean the direction in which the venting gas generated from the battery cell (100) in the battery pack (1) is intended to be discharged.

[0157] For example, the venting direction of the battery cell (100) may correspond to the direction toward the venting space (10S) formed in the battery pack (1).

[0158] For example, the venting direction of the battery cell (100) may correspond to the direction in which a venting hole (e.g., the third hole (10A-3)) is formed in the housing (10A) of the battery assembly (10) covering the plurality of battery cells (100). In one example, the venting direction of the plurality of battery cells may correspond to the direction in which a venting hole (e.g., the third hole (10A-3)) configured to discharge venting gas generated from at least one of the plurality of battery cells (100) is formed.

[0159] Meanwhile, in the embodiment, the venting direction of the battery cell (100) in the battery pack (1) may correspond to the lower part of the battery pack (1), but the venting direction of the battery pack (1) (and battery cell (100)) according to various embodiments of the present disclosure does not necessarily mean the lower part of the battery pack (1), and in some cases, the venting direction may be the upper part of the battery pack (1) or the side.

[0160] Fig. 10 is an exploded perspective view illustrating at least a portion of a battery assembly (10) according to an example of the present application. Fig. 11 is a perspective view illustrating at least a portion of a battery assembly (10) according to an example of the present application.

[0161] A battery assembly (10) according to an example of the present application may include a housing (10A) that accommodates a plurality of battery cells (100) and a cooling member (200). For example, the battery assembly (10) may include a cover member (10B) that covers at least a portion of the housing (10A).

[0162] For example, the housing (10A) may have a structure in which at least one side is open to accommodate a plurality of battery cells (100) and a cooling member (200).

[0163] For example, referring to FIG. 10, the remaining surface of the housing (10A) except for the open surface can form a receiving space for receiving a plurality of battery cells (100) and a cooling member (200).

[0164] A battery assembly (10) according to an example of the present application may include a cover member (10B) that covers at least a portion of the housing (10A) as described above. The fact that the cover member (10B) covers the housing (10A) may mean that at least a portion of an open surface of the housing (10A) is shielded.

[0165] Referring to FIGS. 10 and 11, in a battery assembly (10) according to an example of the present application, a housing (10A) may have two open side surfaces parallel to the XZ plane and an open upper surface parallel to the XY plane. In addition, the battery assembly (10) may include an upper cover member (10B-1) covering the open upper surface of the housing (10A) and a side cover member (10B-2) covering the open side surface of the housing (10A).

[0166] In one example, the open side of the housing (10A) may be positioned in a direction corresponding to the protruding direction of the cell tabs (120) of the battery cells (100). In addition, although not shown in the drawing, the cell tabs (120) of the battery cells (100) may be accommodated in the housing (10A) while being coupled to the busbar assembly (300). The side cover member (10B-2) may cover the area where the busbar assembly (300) is positioned.

[0167] In a battery assembly (10) according to an example of the present application, a housing (10A) and a cover member (10B) may be coupled to each other. Due to the coupling, the cover member (10B) may be fixed to the housing (10A). The coupling may be achieved through a coupling means such as a coupling member (bolt or nut, etc.), adhesion, or welding.

[0168] In a battery assembly (10) according to an example of the present application, the housing (10A) may include a first hole (10A-1) provided on one surface so that at least a portion of the inlet (220) of the cooling member (200) may pass through it, and a second hole (10A-2) provided on one surface so that at least a portion of the outlet (230) of the cooling member (200) may pass through it. In one example, at least a portion of the inlet (220) may pass through the housing (10A) in the first hole (10A-1), and at least a portion of the outlet (230) may pass through the housing (10A) in the second hole (10A-2), so that the inlet (220) and the outlet (230) may have a shape that protrudes from the housing (10A). Through this, space can be utilized efficiently, and cooling of the battery cell (100) can be performed more effectively. In one example, the first hole (10A-1) and the second hole (10A-2) may be provided at the bottom of the housing (10A).

[0169] In one example, the first hole (10A-1) provided on one surface of the housing (10A) may be formed in consideration of the number, size, position, shape, etc. of the inlet portion (220). The first hole (10A-1) may be appropriately formed in a position corresponding to the position at which the inlet portion (220) is to penetrate the housing (10A).

[0170] In one example, the second hole (10A-2) provided on one side of the housing (10A) may be formed in consideration of the number, size, position, shape, etc. of the outlet (230). The second hole (10A-2) may be appropriately formed in a position corresponding to the position at which the outlet (230) is to penetrate the housing (10A).

[0171] Considering the structure of the cooling member (200) described above in one example, the first hole (10A-1) and the second hole (10A-2) may be provided on the same side of the housing (10A).

[0172] In one example, the housing (10A) may include a third hole (10A-3) that is different from the first hole (10A-1) and the second hole (10A-2). The third hole (10A-3) may be provided on the same side of the housing (10A) on which the first hole (10A-1) and the second hole (10A-2) are provided.

[0173] In one example, the housing (10A) can be in contact with at least a portion of the plurality of battery cells (100) and at least a portion of the cooling member (200). Specifically, the inlet (220) and the outlet (230) of the cooling member (200) can each pass through the first hole (10A-1) and the second hole (10A-2) until at least a portion of the plurality of battery cells (100) and at least a portion of the cooling member (200) come into contact with one surface of the housing (10A). Here, the housing (10A) can have a third hole (10A-3) provided on at least one surface that comes into contact with at least a portion of the plurality of battery cells (100) or at least a portion of the cooling member (200). In one example, the third hole (10A-3) may be provided between the first hole (10A-1) and the second hole (10A-2), and may be spaced apart from the first hole (10A-1) and the second hole (10A-2).

[0174] In one example, as described above, the protrusion (215) may correspond to the venting direction of the battery cell (100), and accordingly, the penetration direction of the first hole (10A-1) and the second hole (10A-2) into the housing (10A) may correspond to the venting direction.

[0175] In one example, the penetration direction of the third hole (10A-3) into the housing (10A) may correspond to the venting direction. Through this, the battery assembly (10) can more effectively dissipate heat generated from the battery cell (100) and easily discharge generated gases or flying substances to the outside through the third hole (10A-3). The third hole (10A-3) is not limited in size or number as long as the housing (10A) has durability sufficient to protect the plurality of battery cells (100) and the cooling member (200) from external shocks and vibrations.

[0176] Figures 12 and 13 are enlarged views of portion P of Figure 10.

[0177] In one example, the housing (10A) may include a cover (10A-4) that covers at least a portion of the third hole (10A-3).

[0178] For example, there may be a plurality of third holes (10A-3), and at least some of the plurality of third holes (10A-3) may be covered by a cover (10A-4).

[0179] For example, the cover (10A-4) can be connected to one side of the boundary of the third hole (10A-3) and can close or open the third hole (10A-3).

[0180] For example, the cover (10A-4) may be operated in the form of a flap. The cover (10A-4) may close at least a portion of the third hole (10A-3) and may be opened when the internal pressure of the battery assembly (10) during closure is above a certain value.

[0181] In an embodiment, the housing (10A) may include a latch (10A-4L) connected to one side of the boundary of the third hole (10A-3) such that the cover (10A-4) closes at least a portion of the third hole (10A-3). For example, the latch (10A-4L) may close at least a portion of the third hole (10A-3) by supporting the lower side of the cover (10A-4). For example, when the internal pressure of the battery assembly (10) is above a certain value, the latch (10A-4L) may be detached from the housing (10A), thereby causing a portion of the unsupported cover (10A-4) to fall into the third hole (10A-3), thereby allowing the cover (10A-4) to open the third hole (10A-3).

[0182] If the internal pressure of the battery assembly (10) exceeds a certain value, for example, it may be a situation in which high heat and gas are emitted from the battery cell (100) due to abnormal operation of the battery cell (100).

[0183] In one example, the cover (10A-4) may include a metal material. For example, the cover (10A-4) may include a metal material having excellent thermal conductivity, and the metal material may include one or more selected from the group consisting of gold (Au), silver (Ag), copper (Cu), aluminum (Al), tungsten (W), iron (Fe), zinc (Zn), nickel (Ni), platinum (Pt), and magnesium (Mg), but is not limited thereto.

[0184] For example, if the cover (10A-4) includes a metal material, heat generated from the battery cell (100) can be more effectively dissipated even if at least a portion of the third hole (10A-3) is closed. In one example, the cover (10A-4) may include a refractory material.

[0185] For example, the refractory material may include, but is not limited to, mica. In one example, the cover (10A-4) may include an insulating material. For example, the insulating material may include, but is not limited to, a resin.

[0186] In one example, the cover (10A-4) opens the third hole (10A-3) when the internal pressure of the battery assembly (10) exceeds a certain value as described above, thereby more effectively dissipating heat generated from the battery cell (100) and easily releasing generated gases or flying substances to the outside.

[0187] FIG. 14 is an exploded perspective view illustrating at least a portion of a battery pack (1) according to an example of the present application. The battery pack (1) according to an example of the present application may include the battery assembly (10) described above. Hereinafter, the description of the battery assembly (10) may refer to the description described above.

[0188] A battery pack (1) according to an example of the present application may include a pack housing (1A) that provides a receiving space for accommodating a battery assembly (10). The pack housing (1A) of the battery pack (1) may include a pack outer wall frame (1A-1) that surrounds at least a portion of the battery assembly (10) provided in the receiving space.

[0189] For example, the pack housing (1A) may include a pack side wall (1A-2) extending in a first direction (e.g., along the y-axis) and a cross member (1A-3) extending in a second direction (e.g., along the x-axis) to partition the space in the receiving space according to the size of the battery assembly (10).

[0190] For example, the pack housing (1A) may include a space for electrical equipment (1A-4) in which electrical equipment can be provided in addition to a space partitioned to the size of the battery assembly (10) through the pack side wall (1A-2) and the cross member (1A-3).

[0191] In an embodiment, a battery pack (1) may be provided with an electrical device such as a BMS (Battery Management System) in the electrical space (1A-4). The electrical device may be electrically connected to a battery assembly (10) included in the battery pack (1), and may transmit and receive data necessary for managing the battery assembly (10) and perform calculations based on the data.

[0192] A battery pack (1) according to an example of the present application may include a coolant pipe (1C) for introducing and discharging coolant into and out of a battery assembly (10). For example, the battery pack (1) may include a coolant inlet pipe (1C-1) for supplying coolant to introduce coolant into the battery assembly (10) and a coolant outlet pipe (1C-2) for discharging coolant flowing out of the battery assembly (10).

[0193] Fig. 15 is a perspective view showing at least a portion of a battery pack (1) according to an example of the present application, and showing refrigerant pipes (1C-1, 1C-2). Fig. 16 is a cross-sectional view (XY plane) showing at least a portion of a battery pack (1) according to an example of the present application, and showing refrigerant pipes (1C-1, 1C-2). Fig. 17 is a perspective view showing the lower part of at least a portion of a battery pack (1) according to an example of the present application.

[0194] A battery pack (1) according to an example of the present application may include one or more battery assemblies (10). The number of battery assemblies (10) included in the battery pack (1) may be predetermined, and the design of the pack housing (1A) may vary depending on the number. Alternatively, the design of the battery assembly (10) may vary depending on the size of the pack housing (1A) and the number of battery assemblies (10) to be provided.

[0195] In a battery pack (1) according to an example of the present application, a coolant passage (212) provided in a cooling member (200) of a battery assembly (10) may be in communication with a coolant pipe (1C). Specifically, the coolant passage (212) may be in communication with a coolant inlet pipe (1C-1) and a coolant outlet pipe (1C-2).

[0196] In a battery pack (1) according to an example of the present application, a coolant can be introduced into a coolant passage (212) of a cooling member (200) that is connected through a coolant inlet pipe (1C-1). In addition, the coolant that has passed through the coolant passage (212) of the cooling member (200) can be discharged to the outside of the battery pack (1) through a coolant outlet pipe (1C-2) that is connected to the coolant passage (212). The flow path designs of the coolant inlet pipe (1C-1) and the coolant outlet pipe (1C-2) are not particularly limited.

[0197] The movement path of the refrigerant in the battery pack (1) according to an example of the present application can be confirmed. As described above, the refrigerant inlet pipe (1C-1) and the refrigerant passage (212) are connected, and the refrigerant outlet pipe (1C-2) and the refrigerant passage (212) are connected, so the refrigerant introduced into the refrigerant inlet pipe (1C-1) can be discharged through the refrigerant passage (212) to the refrigerant outlet pipe (1C-2).

[0198] A battery pack (1) according to an example of the present application may include a plurality of battery assemblies (10). In addition, a coolant passage (212) of one of the plurality of battery assemblies (10) and a coolant passage (212) of another of the plurality of battery assemblies (10) may be connected to each other through at least one of a coolant inlet pipe (1C-1) and a coolant outlet pipe (1C-2). In this case, one of the coolant passages (212) may be a coolant passage (212) of at least one of the plurality of cooling members (200), and another of the coolant passages (212) may also be a coolant passage (212) of at least one of the plurality of cooling members (200).

[0199] In a battery pack (1) according to an example of the present application, a coolant inlet pipe (1C-1) may be in communication with an inlet passage (221) provided in an inlet portion (220) of a cooling member (200). In addition, in the battery pack (1), a coolant outlet pipe (1C-2) may be in communication with an outlet passage (231) provided in an outlet portion (230) of a cooling member (200).

[0200] In the case where a battery assembly (10) provided in a battery pack (1) according to an example of the present application includes a plurality of cooling members (200), at least some of the plurality of cooling members (200) may be connected to an inlet passage (221) provided in an inlet portion (220) and a coolant inlet pipe (1C-1). Preferably, all of the plurality of cooling members (200) may be connected to an inlet passage (221) provided in an inlet portion (220) and a coolant inlet pipe (1C-1).

[0201] In the case where a battery assembly (10) provided in a battery pack (1) according to an example of the present application includes a plurality of cooling members (200), at least some of the plurality of cooling members (200) may be connected to an outlet passage (231) provided in an outlet portion (230) and a coolant outlet pipe (1C-2). Preferably, all of the plurality of cooling members (200) may be connected to an outlet passage (231) provided in an outlet portion (230) and a coolant outlet pipe (1C-2).

[0202] In one example, the inlet (220) and outlet (230) of the cooling member (200) may protrude from a protruding surface (215) corresponding to the long side of the battery assembly (10). As shown in FIG. 17, the inlet (220) and outlet (230) protrude toward the bottom of the battery pack (1), and therefore, the coolant pipe (1C) passing through the inlet (220) and outlet (230) may also be arranged at the bottom of the battery assembly (10), i.e., the bottom of the battery pack (1).

[0203] In an embodiment, the coolant pipe (1C) provided inside the battery pack (1) can achieve a structure that does not interfere with the side configuration inside the battery pack (1) by being arranged entirely within the lower space of the battery pack (1).

[0204] For example, when configuring a structure in which a busbar assembly (300) is arranged laterally in a battery pack (1), the lower arrangement of the coolant pipe (1C) fundamentally prevents or suppresses interference with the busbar assembly (300), and ultimately, such arrangement can provide a high degree of design freedom. Therefore, the lower arrangement of the coolant pipe (1C) can be usefully applied to a pouch cell-type battery pack (1) in which electrode tabs are arranged laterally.

[0205] In addition, the lower arrangement of the coolant pipe (1C) can also achieve the effect of not unnecessarily expanding the space in the lateral direction of the battery pack (1). Since the lower space of the battery assembly (10) is inevitably provided for venting, when the coolant pipe (1C) is arranged lower, a portion of the venting space is utilized, thereby minimizing the increase in volume due to the coolant pipe (1C) from the perspective of the entire battery pack (1).

[0206] In one example, the refrigerant pipe (1C) may be configured to sequentially pass through a plurality of inlets (220) constituting the battery pack (1) and then sequentially pass through a plurality of outlets (230) constituting the battery pack (1). In order to simplify the structure of the refrigerant pipe (1C), at least some of the plurality of inlets (220) may be aligned to be arranged on the same line, and at least some of the plurality of outlets (230) may also be aligned to be arranged on another same line. This minimizes the bending structure of the refrigerant pipe (1C), while allowing the refrigerant to be smoothly supplied to and recovered from each cooling member (200).

[0207] In one example, the coolant inlet pipe (1C-1) and the coolant outlet pipe (1C-2) are arranged together on one side of the battery pack (1), thereby achieving structural efficiency, such as facilitating pipe installation, maintenance, and repair.

[0208] Fig. 18 is a perspective view showing at least a portion of a battery pack (1) according to an example of the present application, and showing refrigerant pipes (1C-1, 1C-2). Fig. 19 is a cross-sectional view (XY plane) showing at least a portion of a battery pack (1) according to an example of the present application, and showing refrigerant pipes (1C-1, 1C-2). Fig. 20 is a perspective view showing at least a portion of a battery pack (1) according to an example of the present application, and showing refrigerant pipes (1C-1, 1C-2). Fig. 21 is a cross-sectional view (XY plane) showing at least a portion of a battery pack (1) according to an example of the present application, and showing refrigerant pipes (1C-1, 1C-2).

[0209] In one example, there may be multiple refrigerant inlet pipes (1C-1) and refrigerant outlet pipes (1C-2).

[0210] In an embodiment, the battery pack (1) may include a first region (10DS1) including one or more battery assemblies (10) and a second region (10DS2) including one or more battery assemblies (10) in a region different from the first region (10DS1).

[0211] For example, there may be a plurality of battery assemblies (10) included in each of the first region (10DS1) and the second region (10DS2), and the plurality of battery assemblies (10) may be arranged side by side while being spaced apart from each other in one direction (e.g., in the x-axis direction).

[0212] For example, the first region (10DS1) and the second region (10DS2) may be spaced apart from each other, for example, in a direction (e.g., the y-axis direction) that intersects with a direction in which the battery assemblies (10) are arranged side by side (e.g., the x-axis direction). For example, a cross member (1A-3) may be arranged in the spaced apart space.

[0213] Referring to FIGS. 18 and 19, in one example, the first region (10DS1) and the second region (10DS2) may each include different refrigerant pipes (1C-1, 1C-2). In the first region (10DS1), the cooling member (200) may be in communication with the refrigerant inlet pipe (1C-1) and the refrigerant outlet pipe (1C-2). In addition, in the second region (10DS2), the cooling member (200) may be in communication with the refrigerant inlet pipe (1C-1) and the refrigerant outlet pipe (1C-2). Here, the inflow direction of the refrigerant flowing into the refrigerant inlet pipe (1C-1) of the first region (10DS1) and the outflow direction of the refrigerant flowing out of the refrigerant outlet pipe (1C-2) may correspond. In addition, the inflow direction of the refrigerant flowing into the refrigerant inflow pipe (1C-1) of the second area (10DS2) and the outflow direction of the refrigerant flowing out of the refrigerant outflow pipe (1C-2) can correspond.

[0214] Referring to FIGS. 20 and 21, in one example, the first region (10DS1) and the second region (10DS2) may each include different refrigerant pipes (1C-1, 1C-2). In the first region (10DS1), the cooling member (200) may be in communication with the refrigerant inlet pipe (1C-1) and the refrigerant outlet pipe (1C-2). In addition, in the second region (10DS2), the cooling member (200) may be in communication with the refrigerant inlet pipe (1C-2) and the refrigerant outlet pipe (1C-2). Here, the inflow direction of the refrigerant flowing into the refrigerant inlet pipe (1C-1) of the first region (10DS1) and the outflow direction of the refrigerant flowing out of the refrigerant outlet pipe (1C-2) may be opposite. Additionally, the direction of inflow of the refrigerant into the refrigerant inflow pipe (1C-1) of the second region (10DS2) and the direction of outflow of the refrigerant outflow into the refrigerant outflow pipe (1C-2) may be opposite.

[0215] Fig. 22 is a perspective view illustrating at least a portion of a battery pack (1) according to an example of the present application. Fig. 23 is a perspective view illustrating at least a portion of a battery pack (1) according to an example of the present application, showing that a cross member (1A-3) is provided. Fig. 24 is a perspective view illustrating at least a portion of a battery pack (1) according to an example of the present application, showing a mounting surface (1A-6) of the battery pack (1).

[0216] In a battery pack (1) according to an example of the present application, the pack housing (1A) may include a pack support frame (1A-5) that supports a battery assembly (10) accommodated in a receiving space.

[0217] For example, the inlet (220) and outlet (230) protruding from the battery assembly (10) can come into contact with the pack support frame (1A-5).

[0218] For example, the pack support frame (1A-5) can support the battery assembly (10) through the contacted inlet (220) and outlet (230).

[0219] In one example, the pack support frame (1A-5) may be flat. In addition, a separation space (S) may be formed between the battery assembly (10) and the pack support frame (1A-5). That is, the separation space (S) may be formed due to the protruding inlet (220) and outlet (230). That is, the inlet (220) and outlet (230) may be provided in the separation space (S) in the battery pack (1). Through the separation space (S), heat generated from the battery cell (100) can be more effectively dissipated, and generated gases or flying substances can also be easily discharged to the outside.

[0220] In one example, the venting direction of the battery cell (100) or battery assembly (10) and the protrusion direction of the inlet (220) or outlet (230) can be matched to utilize the separation space (S) for multiple purposes.

[0221] A battery pack (1) according to an example of the present application may include a mounting surface (1A-6). The mounting surface (1A-6) may be connected to an outer wall frame (1A-1).

[0222] For example, a portion of the mounting surface (1A-6) may be connected to the outer wall frame (1A-1).

[0223] For example, the mounting surface (1A-6) and the outer wall frame (1A-1) may be connected to each other through a connecting means such as a joint (bolt or nut, etc.), adhesion, or welding.

[0224] For example, if the mounting surface (1A-6) is connected to the outer wall frame (1A-1), a battery pack (1) with higher durability can be secured.

[0225] In a battery pack (1) according to an example of the present application, a first mounting surface hole (1A-6a) may be provided so that at least a part of an inlet (220) provided in a cooling member (200) of a battery assembly (10) may be penetrated, and a second mounting surface hole (1A-6b) may be provided so that at least a part of an outlet (230) provided in a cooling member (200) may be penetrated.

[0226] In a battery pack (1) according to an example of the present application, the mounting surface (1A-6) may be spaced apart from the pack support frame (1A-5) by a predetermined distance, the pack support frame (1A-5) may support the inlet (220) and the outlet (230) of the battery assembly (10), and the mounting surface (1A-6) may support an area of ​​the battery assembly (10) excluding the inlet (220) and the outlet (230). For example, the mounting surface (1A-6) may be provided between the pack support frame (1A-5) and the battery assembly (10), and the separation space (S) may be defined as the space between the mounting surface (1A-6) and the pack support frame (1A-5).

[0227] In one example, the first settling surface hole (1A-6a) provided in the settling surface (1A-6) may be formed in consideration of the number, size, position, shape, etc. of the inlet portion (220).

[0228] For example, the first settling surface hole (1A-6a) may be appropriately formed at a corresponding position in consideration of the position at which the inlet (220) is intended to penetrate the settling surface (1A-6).

[0229] For another example, the first settling surface hole (1A-6a) may be formed as a single hole so that the inlet (220) can pass through it entirely.

[0230] In one example, the second mounting surface hole (1A-6b) provided in the mounting surface (1A-6) may be formed in consideration of the number, size, position, shape, etc. of the outlet portion (230). For example, the second mounting surface hole (1A-6b) may be appropriately formed in a corresponding position in consideration of the position at which the outlet portion (230) is to penetrate the mounting surface (1A-6).

[0231] Considering the structure of the cooling member (200) described above, the first mounting surface hole (1A-6a) and the second mounting surface hole (1A-6b) can be provided on the same side of the mounting surface (1A-6).

[0232] In one example, the mounting surface (1A-6) may include a third mounting surface hole (1A-6c) that is different from the first mounting surface hole (1A-6a) and the second mounting surface hole (1A-6b). The third mounting surface hole (1A-6c) may be provided on the same side of the mounting surface (1A-6) on which the first mounting surface hole (1A-6a) and the second mounting surface hole (1A-6b) are provided.

[0233] In one example, the mounting surface (1A-6) may be in contact with the remaining portion except for at least a portion of the inlet (220) and at least a portion of the outlet (230) protruding from the battery assembly (10) as described above. As described above, a third hole (10A-3) may be provided in the housing (10A) of the battery assembly (10), and the mounting surface (1A-6) may have a third mounting surface hole (1A-6c) at a position corresponding to the third hole (10A-3). Through the third mounting surface hole (1A-6c) provided at a position corresponding to the third hole (10A-3), heat generated from the battery cell (100) can be more effectively dissipated.

[0234] Fig. 25 is a cross-sectional view (YZ plane) showing at least a portion of a battery pack (1) according to an example of the present application, showing that an auxiliary member (20) is provided. Fig. 26 is a perspective view showing an auxiliary member (20) in a battery pack (1) according to an example of the present application.

[0235] A battery pack (1) according to an example of the present application may include an auxiliary member (20) provided between a battery assembly (10) and a pack support frame (1A-5). The auxiliary member (20) supports a lower surface of the battery assembly (10) or a lower surface of a mounting surface (1A-6), and may be provided on an upper surface of the pack support frame (1A-5). Through this, the battery assembly (10) may be stably supported. In one example, the auxiliary member (20) may be provided between an inlet (220) and an outlet (230) of a cooling member (200).

[0236] In one example, the auxiliary member (20) may include a through hole (21). The through hole (21) may be penetrated in a first direction (e.g., z-axis direction) corresponding to the venting direction. The through hole (21) may be further penetrated in a second direction (e.g., x-axis direction) intersecting the first direction. The through hole (21) may be further penetrated in a third direction (e.g., y-axis direction) intersecting the first and second directions.

[0237] Fig. 27 is an exploded perspective view illustrating at least a portion of a battery assembly (10) according to an example of the present application. Fig. 28 is a perspective view illustrating at least a portion of a battery pack (1) according to an example of the present application, showing a mounting surface (1A-6) of the battery pack (1).

[0238] In one example, the housing (10A) can cover the side surfaces of a plurality of battery cells (100) and a cooling member (200) that are not covered by the cover members (10B-1, 10B-2).

[0239] For example, the housing (10A) can be configured to open the lower portion of a plurality of battery cells (100) and a cooling member (200).

[0240] In one example, the lower portion of the battery assembly (10) may be provided on the mounting surface (1A-6), and due to the open lower portion, a plurality of battery cells (100) and a portion of the cooling member (200) may be in contact with the mounting surface (1A-6).

[0241] FIG. 29 is a cross-sectional view (XY plane) showing at least a portion of a battery assembly (10) according to an example of the present application, showing a portion of a housing (10A). FIG. 30 is a cross-sectional view (XY plane) showing at least a portion of a battery pack (1) according to an example of the present application, showing a cut portion along line B-B' of FIG. 29. FIG. 31 is a cross-sectional view (XZ plane) showing at least a portion of a battery pack (1) according to an example of the present application, showing that an auxiliary member (20) is provided.

[0242] In one example, at least one of a first hole (10A-1), a second hole (10A-2), and a third hole (10A-3) may be provided at the lower portion of the housing (10A) of the battery assembly (10).

[0243] For example, the first hole (10A-1) and the second hole (10A-2) can be formed to correspond to the area where the cooling member (200) is placed in the battery assembly (10).

[0244] For example, the third hole (10A-3) can be formed to correspond to the area where the battery cell (100) is arranged in the battery assembly (10).

[0245] Through this, space can be utilized efficiently and cooling of the battery cell (100) can be performed more effectively, while gas or flying substances generated from the battery cell (100) can be easily discharged to the outside.

[0246] In one example, there may be a plurality of third holes (10A-3) arranged at positions corresponding to areas corresponding to one battery cell (100), and the plurality of third holes (10A-3) may be spaced apart from each other in one direction (e.g., the x-axis direction).

[0247] For example, the first hole (10A-1) and the second hole (10A-2) may be spaced apart. For example, the direction in which the first hole (10A-1) and the second hole (10A-2) are spaced apart may correspond to one direction (e.g., the x-axis direction) in which the plurality of third holes (10A-3) described above are spaced apart.

[0248] Although not shown separately, a third hole (10A-3) may be further arranged between the first hole (10A-1) and the second hole (10A-2).

[0249] In one example, the battery pack (1) may include a venting space (10S) at a position corresponding to the third hole (10A-3) between the pack support frame (1A-5) and the battery assembly (10).

[0250] In one example, a venting bulkhead (30) may be provided on the pack support frame (1A-5) so that a venting space (10S) is formed.

[0251] In one example, the venting space (10S) may be formed between the venting partition (30) at a position corresponding to the third hole (10A-3). For example, the inlet (220) and the outlet (230) may be provided between the venting partition (30), but may be provided in an area other than the venting space (10S).

[0252] In one example, through the venting partition (30), gases or flying substances can be easily discharged to the outside, but the flying substances, etc. can be prevented from affecting other adjacent battery cells (100) or cell assemblies (100A, 100B). For example, through the venting partition (30), the battery pack (1) can not include a mounting surface (1A-6).

[0253] A battery assembly (10) and a battery pack (1) according to an example 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, a battery assembly (10) and a battery pack (1) according to an example 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.

[0254] While various embodiments of the present invention have been described in detail above, the scope of the present invention 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 invention as set forth in the claims. Furthermore, the embodiments described above may be implemented by deleting some components, and the embodiments may be implemented in combination with each other.

[0255] [Explanation of symbols]

[0256] 1... battery pack

[0257] 1A... pack housing

[0258] 1A-1... Pack exterior wall frame

[0259] 1A-2... Pack side wall

[0260] 1A-3... Cross member

[0261] 1A-4... Battlefield space

[0262] 1A-5... Pack support frame

[0263] 1A-6... Anchoring surface

[0264] 1A-6a... 1st anchoring surface hole

[0265] 1A-6b... 2nd anchorage hole

[0266] 1A-6c... 3rd landing surface hole

[0267] 1B... Pack Cover

[0268] 1C... refrigerant piping

[0269] 1C-1... Refrigerant inlet pipe

[0270] 1C-2... Refrigerant discharge pipe

[0271] S...separation space

[0272] 10... Battery assembly

[0273] 10A... housing

[0274] 10A-1... Hole 1

[0275] 10A-2... 2nd hole

[0276] 10A-3... 3rd hole

[0277] 10B... cover absence

[0278] 10B-1... Upper cover member

[0279] 10B-2... Side cover member

[0280] 100... battery cells

[0281] 100A... 1st cell assembly

[0282] 100B... Second cell assembly

[0283] 110... cell assembly

[0284] 120... Cell Tab

[0285] 130... Page 1

[0286] 200... cooling absence

[0287] 210... main body

[0288] 211... body part

[0289] 212... Refrigerant Euro

[0290] 213... Gas pocket

[0291] 214... bulkhead

[0292] 215... protrusion

[0293] 220... inlet

[0294] 221... inflow route

[0295] 230... Outlet

[0296] 231... leak

[0297] 300... busbar assembly

Claims

1. A plurality of battery cells; and Including a cooling member interposed between the plurality of battery cells, The above cooling member is, It comprises a main body including a refrigerant passage provided to allow refrigerant to flow inside, an inlet portion communicated with the refrigerant passage and provided to allow the refrigerant to flow in, and an outlet portion communicated with the refrigerant passage and provided to allow the refrigerant to flow out. A battery assembly in which the inlet and outlet portions extend from one side of the main body portion corresponding to the venting direction of the plurality of battery cells.

2. In paragraph 1, The venting direction of the above plurality of battery cells is: A battery assembly, wherein a venting hole is formed in a housing covering the plurality of battery cells, corresponding to a direction in which a venting gas generated from at least one of the plurality of battery cells is discharged.

3. In paragraph 1, The plurality of battery cells include a first cell assembly and a second cell assembly, and the first cell assembly and the second cell assembly each include two or more battery cells. A battery assembly wherein the cooling member is provided between the first cell assembly and the second cell assembly.

4. In paragraph 3, The above first cell assembly and the above second cell assembly, The length of each long side (L) C ) and the length of the short side (L) T ) ratio (L) C / L T ) is between 1 and 100, or A battery assembly, each battery having a capacity of 50 Ah to 1,000 Ah.

5. In paragraph 1, A battery assembly, wherein the main body further includes a gas pocket.

6. In paragraph 1, A battery assembly in which the inlet and outlet portions extend in the same direction from one surface of the main body.

7. In paragraph 6, The above inlet and outlet parts are, A battery assembly that protrudes beyond one side of the plurality of battery cells positioned parallel to one side of the main body.

8. In paragraph 1, The above cooling member is provided in multiple pieces, The inlet portions of each of the plurality of cooling members are arranged in a row so that at least some of them face each other, A battery assembly in which the outlets of each of the plurality of cooling members are arranged in a row so that at least some of them face each other.

9. In paragraph 1, A battery assembly wherein at least a portion of said cooling member is in contact with adjacent battery cells.

10. In paragraph 1, The above cooling member is a battery assembly including an elastic material.

11. In paragraph 1, A battery assembly in which the refrigerant flowing in the above refrigerant path absorbs heat generated from at least some of the plurality of battery cells.

12. A housing comprising a plurality of battery cells and a cooling member interposed between the plurality of battery cells, The above cooling member includes a main body including a refrigerant passage provided to allow refrigerant to flow inside, an inlet portion communicated with the refrigerant passage and provided to allow the refrigerant to flow in, and an outlet portion communicated with the refrigerant passage and provided to allow the refrigerant to flow out. A battery assembly, wherein the housing includes a first hole provided on one surface through which at least a portion of the inlet portion passes, and a second hole provided on one surface through which at least a portion of the outlet portion passes.

13. In paragraph 12, A battery assembly further comprising a cover member covering at least a portion of the housing.

14. In paragraph 12, A battery assembly wherein the first hole and the second hole are provided on the same side of the housing.

15. In paragraph 12, A battery assembly wherein the housing further includes a third hole different from the first hole and the second hole.

16. A battery assembly comprising a plurality of battery cells and a cooling member interposed between the plurality of battery cells; A pack housing providing a receiving space for accommodating the above battery assembly; It includes a refrigerant inlet pipe for introducing refrigerant into the battery assembly and a refrigerant outlet pipe for discharging the introduced refrigerant to the outside. The above cooling member includes a main body including a refrigerant passage provided to allow the refrigerant to flow therein, an inlet portion communicated with the refrigerant passage and provided to allow the refrigerant to flow in, and an outlet portion communicated with the refrigerant passage and provided to allow the refrigerant to flow out. A battery pack in which the above refrigerant passage is connected to the above refrigerant inlet pipe and the above refrigerant outlet pipe.

17. In paragraph 16, The above battery assembly is provided in multiple pieces, A battery pack wherein the refrigerant passage of one of the plurality of battery assemblies and the refrigerant passage of another of the plurality of battery assemblies are communicated with each other through at least one of the refrigerant inlet pipe and the refrigerant outlet pipe.

18. In paragraph 16, The pack housing includes a pack outer wall frame surrounding at least a portion of the battery assembly and a pack support frame supporting the battery assembly accommodated in the accommodation space. The above inlet and outlet extend from one side of the main body corresponding to the venting direction of the plurality of battery cells, A battery pack in which the inlet and outlet are provided in a space formed between the battery assembly and the pack support frame.

19. In paragraph 18, It further includes a mounting surface provided to mount the battery assembly, including a first mounting surface hole connected to the outer wall frame and provided to allow at least a portion of the inlet to pass through, and a second mounting surface hole provided to allow at least a portion of the outlet to pass through, A battery pack in which the above-mentioned mounting surface is spaced apart from the above-mentioned pack support frame by a predetermined distance.

20. In paragraph 19, A battery pack wherein the mounting surface further includes a third mounting surface hole that is different from the first mounting surface hole and the second mounting surface hole.

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