Battery device and electric device

Abstract

The present application discloses a battery device and an electric device. The battery device comprises: a case; battery packs located in the case and each comprising a plurality of battery cells arranged side by side in a first direction, the plurality of battery packs being arranged side by side in a second direction; a limiting member located in the case and arranged on one side of the plurality of battery packs in the first direction, the limiting member comprising a first accommodating cavity; and a heat exchange member located in the case and arranged on one side of the battery cells in a third direction, the heat exchange member comprising a second accommodating cavity, wherein the second accommodating cavity is communicated with the first accommodating cavity, and the first direction, the second direction and the third direction intersect pairwise.

Description

Battery devices and electrical appliances Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202510198659.0, entitled “Battery Device and Power Consumption Device”, filed on February 21, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of batteries, and in particular to a battery device and an electrical device. Background Technology

[0003] Battery devices are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0004] However, as the demand for energy density and weight reduction in battery devices increases, the spatial layout becomes more compact, and heat exchange devices occupy a lot of space, resulting in insufficient internal space for battery devices and consequently, lower energy density. Summary of the Invention

[0005] In view of the above problems, this application provides a battery device and an electrical device that can improve the energy density of the battery device.

[0006] In a first aspect, this application provides a battery device, comprising: a housing; a battery pack, located in the housing and including a plurality of battery cells arranged side by side along a first direction, the plurality of battery packs being arranged side by side along a second direction; a limiting member, located in the housing and disposed on one side of the plurality of battery packs in the first direction, the limiting member including a first receiving cavity; and a heat exchange member, located in the housing and disposed on one side of at least one battery pack in a third direction, the heat exchange member including a second receiving cavity, the second receiving cavity communicating with the first receiving cavity, the first direction, the second direction, and the third direction intersecting each other.

[0007] In this embodiment of the application, the battery device includes a housing, a battery pack, a limiting component, and a heat exchange component. The battery pack is formed by multiple battery cells arranged side by side along a first direction, and the battery pack is used to realize the energy storage function of the battery device. The limiting component is disposed on one side of the battery pack in the first direction, and the limiting component can provide a limit to the battery pack, ensuring the stability of the relative position between the battery pack and the housing. The heat exchange component is disposed on one side of the battery cells to provide heat exchange to the battery cells. The second receiving cavity in the heat exchange component is interconnected with the first receiving cavity of the limiting component, so that the limiting component can not only provide a limiting function, but also allow the heat exchange medium to flow, which can reduce the overall space occupied by the heat exchange device in the battery device, improve the utilization rate of the space in the housing, and thus improve the energy density of the battery device.

[0008] In some embodiments, it further includes: a reinforcing member extending along a first direction and connected between the inner wall of the housing and the limiting member; a plurality of reinforcing members being spaced apart along a second direction; and at least one reinforcing member including a third receiving cavity, wherein the third receiving cavity and the first receiving cavity are in communication.

[0009] In these embodiments, the inner wall of the housing and the limiting components are reinforced, which can further improve the stability of the relative positions between the limiting components, the battery pack, and the housing, and improve the shock resistance of the battery device. The third receiving cavity within the reinforcing component is connected to the first receiving cavity, allowing the heat exchange medium to circulate within the reinforcing component. This can further reduce the overall space occupied by the heat exchange device within the battery device, improve the utilization rate of the space within the housing, and thus increase the energy density of the battery device.

[0010] In some embodiments, the housing is provided with at least one media transport port, and the third receiving cavity is connected to the outside of the housing via the media transport port.

[0011] In these embodiments, the medium transport port is used to input or output the heat exchange medium, the third receiving cavity is connected to the outside of the housing via the medium transport port, so that the external heat exchange structure can enter the third receiving cavity via the medium transport port, and the reinforcing component can serve as the input or output port of the heat exchange medium of the heat exchange device.

[0012] In some embodiments, the reinforcing member includes a body portion and a transmission portion distributed along a third direction. The body portion abuts against the inner wall of the housing and the limiting member. A portion of the transmission portion passes through the medium transport port. A third receiving cavity is disposed in the transmission portion, and the transmission portion has openings at both ends in the first direction that communicate with the third receiving cavity.

[0013] In these embodiments, the third receiving cavity is disposed within the transmission section, which is located at the medium transport port. The transmission section has an opening, allowing the heat exchange medium to enter the third receiving cavity through the opening. Furthermore, the main body and the transmission section can be integrally formed to improve the problem of heat exchange medium overflow.

[0014] In some embodiments, the transmission section is located on the side of the body section in the third direction, the first receiving cavity is located on the side of the limiting member in the third direction, and at least a portion of the third receiving cavity and at least a portion of the first receiving cavity are arranged side by side along the first direction.

[0015] In these alternative embodiments, at least a portion of the third receiving cavity in the transmission component and the first receiving cavity in the limiting component are arranged side by side along the first direction, so that openings are provided at adjacent positions of the first receiving cavity and the third receiving cavity to allow the first receiving cavity and the third receiving cavity to communicate with each other.

[0016] In some embodiments, the medium transport port includes a medium inlet and a medium outlet, and at least two reinforcing members include two first reinforcing members, each of which includes a third receiving cavity. The third receiving cavity of one of the first reinforcing members is connected to the outside of the housing via the medium inlet, and the third receiving cavity of the other first reinforcing member is connected to the outside of the housing via the medium outlet.

[0017] In these embodiments, one of the two first reinforcing members can serve as the input member of the heat exchange medium and the other as the output member of the heat exchange medium. The heat exchange medium enters the third receiving cavity through one of the first reinforcing members and is discharged through the other first reinforcing member after flowing through the first receiving cavity and the second receiving cavity, thereby realizing the circulation of the heat exchange medium.

[0018] In some embodiments, at least two reinforcing members further include a second reinforcing member, and one or more second reinforcing members are located between two first reinforcing members.

[0019] In these embodiments, a second reinforcing member that is not used as a heat exchange medium input or output component is disposed between two first reinforcing members. The distance between the two first reinforcing members is large enough to increase the flow distance of the heat exchange medium and improve the heat exchange effect.

[0020] In some embodiments, the heat exchange component includes a connecting section and a heat exchange section. The connecting section is located on the side of the limiting component in the third direction, and the heat exchange section is located on the side of the battery cell in the third direction. The limiting component has a first opening on the side facing the connecting section, and the connecting section has a second opening on the side facing the limiting component. The first receiving cavity and the second receiving cavity are interconnected through the first opening and the second opening.

[0021] In these embodiments, the connecting section of the heat exchange component extends to and partially covers the limiting component. The limiting component has a first opening facing the connecting section, and the connecting section has a second opening facing the limiting component, so that the first receiving cavity and the second receiving cavity can communicate with each other through the first opening and the second opening.

[0022] In some embodiments, a reinforcing plate is provided inside the limiting component, which divides the limiting component into a plurality of sub-chambers distributed along a third direction. One of the plurality of sub-chambers facing the connecting section is the first receiving chamber, which can reduce the distance between the first receiving chamber and the second receiving chamber, reduce the flow distance of the heat exchange medium outside the heat exchange component, and improve the heat exchange effect.

[0023] In these embodiments, the reinforcement plate provided inside the limiting component can improve the structural strength of the limiting component, and one of the multiple sub-cavities facing the connecting section is the first receiving cavity.

[0024] In some embodiments, the first receiving cavity includes two independent first chambers; the second receiving cavity includes two second chambers distributed along a second direction, the ends of the two second chambers away from the limiting member in the first direction are connected to each other, and the second chambers and the first chambers are connected in a one-to-one correspondence.

[0025] In these embodiments, the first receiving cavity includes two first chambers, and the second receiving cavity includes two second chambers. One of the two first chambers and the two second chambers can serve as a medium input chamber and the other as a medium output chamber, so that the heat exchange medium can flow from one of the first chambers into the two second chambers and flow out from the other first chamber, forming a circulation loop of the heat exchange medium.

[0026] In some embodiments, a pressure relief mechanism is provided on the side of the battery cell facing the heat exchange component; the heat exchange component includes a heat exchange region and a connection region distributed along a second direction, a second chamber is located in the heat exchange region, and the connection region is provided with a clearance hole, the projection of the clearance hole in a third direction and the projection of the pressure relief mechanism in a third direction at least partially overlap.

[0027] In these embodiments, when a pressure relief mechanism is provided on the battery cell facing the heat exchange component, a clearance hole is provided in the connection area of ​​the heat exchange component, and the projections of the clearance hole and the pressure relief mechanism at least partially overlap, so that the gas of the pressure relief mechanism can be discharged in a timely manner through the clearance hole.

[0028] In some embodiments, two heat exchange regions are respectively located on both sides of the connecting region in the second direction, and each heat exchange region is provided with a second chamber.

[0029] In these embodiments, heat exchange areas are provided on both sides of the connection area, that is, a second receiving cavity is provided on both sides of the connection area, which can provide heat exchange to the battery cell and improve the heat exchange effect.

[0030] In some embodiments, the housing includes an end beam spaced apart from the limiting member along a first direction, the battery pack is located between the end beam and the limiting member, one end of the heat exchange member is connected to the limiting member, and the other end is connected to the end beam.

[0031] In these embodiments, one end of the heat exchange component is fixed to the limiting component and the other end is fixed to the end beam, which can improve the stability of the relative position of the heat exchange component and the housing, and improve the shock resistance of the battery device.

[0032] Secondly, embodiments of this application provide an electrical device, including the battery device described in the first aspect embodiment. Attached Figure Description

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0034] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this application;

[0035] Figure 2 is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0036] Figure 3 is a schematic diagram of the structure of a battery pack provided in one embodiment of the application;

[0037] Figure 4 is an exploded view of a single battery cell provided in an embodiment of this application;

[0038] Figure 5 is a schematic diagram of the structure of a battery device provided in another embodiment of this application;

[0039] Figure 6 is a schematic diagram of the structure of a battery device provided in another embodiment of this application;

[0040] Figure 7 is an illustration of a battery device provided in another embodiment of this application;

[0041] Figure 8 is a cross-sectional view at point AA in Figure 7;

[0042] Figure 9 is a partially enlarged structural schematic diagram of Figure 8;

[0043] Figure 10 is a cross-sectional view at point BB in Figure 7;

[0044] Figure 11 is a partially enlarged structural schematic diagram of Figure 10;

[0045] Figure 12 is a cross-sectional view of the heat exchange component of the battery device provided in an embodiment of this application.

[0046] 10. Vehicle; 110. Motor; 120. Controller; 20. Battery assembly;

[0047] 100. Battery pack;

[0048] 200. Container body; 2021. First container body; 2022. Second container body; 210. Medium transport port; 211. Medium inlet; 212. Medium outlet; 220. End beam; 230. Limiting beam; 240. Side beam; 250. Clearance space; 260. Base plate;

[0049] 300, battery cell;

[0050] 400, limiting component; 410, first receiving cavity; 411, first chamber; 420, first opening; 430, reinforcing plate; 440, third opening;

[0051] 500, Heat exchange component; 501, Heat exchange area; 502, Connection area; 510, Second receiving cavity; 511, Second chamber; 520, Connection section; 521, Second opening; 530, Heat exchange section; 540, Clearance hole;

[0052] 600, Reinforcing component; 60a, First reinforcing component; 60b, Second reinforcing component; 610, Third receiving cavity; 601, Main body; 6011, Reinforcing rib; 602, Transmission section; 603, Partition plate; 620, Fourth opening; 630, Fifth opening;

[0053] 1. Housing; 11. Receiving cavity; 12. Opening; 13. Top cover assembly; 131. Pressure relief mechanism;

[0054] 2. Electrode assembly; 21. Electrode body; 22. Tab;

[0055] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0056] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0057] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0058] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0059] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0060] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0061] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0062] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery device applications, market demand is also constantly increasing.

[0063] The heat exchange device occupies a lot of space in the battery device, resulting in insufficient space for internal arrangement of the battery device, which in turn leads to a low energy density of the battery device.

[0064] Based on the above problems, this application provides a battery device, including a housing and a battery pack, a limiting component, and a heat exchange component located inside the housing. The first receiving cavity of the limiting component and the second receiving cavity of the heat exchange component are interconnected, so that the limiting component can not only provide a limiting function, but also allow the heat exchange medium to flow. This can reduce the overall space occupied by the heat exchange device inside the battery device, improve the utilization rate of the space inside the housing, and thus improve the energy density of the battery device.

[0065] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices using battery devices.

[0066] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0067] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0068] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. The battery cell can be cylindrical, flat, cuboid, or other shapes, and this application embodiment is not limited to this either.

[0069] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application may include a battery module or a battery pack. A battery pack generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0070] A single battery cell includes electrode components and an electrolyte. The electrode components include a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode components. The positive electrode includes a positive current collector and a positive active material layer, the latter coated on the surface of the current collector. The current collector includes a positive current-collecting section and a positive electrode tab connected to it. The current-collecting section is coated with the positive active material layer, while the tab is not. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material layer includes the positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative current collector and a negative active material layer, the negative active material layer being coated on the surface of the negative current collector. The negative current collector includes a negative current collection section and a negative electrode tab connected to the negative current collection section. The negative current collection section is coated with the negative active material layer, while the negative electrode tab is not coated with the negative active material layer. The material of the negative current collector can be copper, and the negative active material layer includes negative active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0071] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including housings and electrical devices using battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0072] Please refer to Figure 1, which is a schematic diagram of the structure of a vehicle 10 provided in some embodiments of this application. The vehicle 10 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 20 is provided inside the vehicle 10, and the battery device 20 can be located at the bottom, front, or rear of the vehicle 10. The battery device 20 can be used to power the vehicle 10; for example, the battery device 20 can serve as the operating power source for the vehicle 10. The vehicle 10 may also include a controller 120 and a motor 110. The controller 120 is used to control the battery to supply power to the motor 110, for example, to meet the power needs of the vehicle 10 during starting, navigation, and driving.

[0073] In some embodiments of this application, the battery device 20 can not only serve as the operating power source for the vehicle 10, but also as the driving power source for the vehicle 10, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 10.

[0074] Figure 2 shows a schematic diagram of the structure of a battery device 20 according to an embodiment of this application. Figure 3 shows a battery pack 100 according to an embodiment of this application. A battery device 20 is provided, which includes a housing 200 and a battery pack 100 located inside the housing 200.

[0075] In some embodiments, the battery device 20 may be a battery pack, which includes a housing 200 and one or more battery cells 300, the battery cells 300 being housed in the housing 200.

[0076] As an example, multiple battery cells 300 can be directly fixed to the housing 200 and housed in the housing 200.

[0077] As an example, the housing 200 may include a first housing 2021 and a second housing 2022. The first housing 2021 and the second housing 2022 are fastened together to form a closed space inside the housing 200 to house the battery pack 100. Here, "closed" refers to covering or closing, which can be sealed or unsealed. The first housing 2021 may be a top cover or a bottom wall.

[0078] Optionally, multiple individual battery cells 300 can be directly installed inside the housing 200 without forming a battery pack 100.

[0079] The battery cell 300 refers to the smallest unit that makes up the battery device 20. As shown in Figure 4, the battery cell 300 includes a top cover assembly 13, a housing 1, and an electrode assembly 2. The housing 1 has a receiving cavity 11, the electrode assembly 2 is located in the receiving cavity 11, and the top cover assembly 13 covers the opening of the housing 1.

[0080] Electrode assembly 2 is the component in the battery cell 300 where electrochemical reactions occur. The casing 1 may contain one or more electrode assemblies 2. Electrode assembly 2 is mainly formed by winding or stacking electrode sheets, which are divided into positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body 21, while the portions of the positive and negative electrode sheets without active material each constitute a tab 22. The positive and negative tabs 22 can be located together at one end of the electrode body 21 or separately at both ends of the electrode body 21. During the charging and discharging process of the battery cell 300, the positive and negative active materials react with the electrolyte, and the tabs 22 connect to the electrode terminals to form a current loop.

[0081] The electrode assembly 2 can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked. In some embodiments, the electrode assembly 2 is a wound structure. The positive and negative electrode sheets are wound into a wound structure. In some embodiments, the electrode assembly 2 is a stacked structure. As an example, multiple positive and negative electrode sheets can be provided, with multiple positive and multiple negative electrode sheets alternately stacked. Multiple spacers can be provided and respectively provided between any adjacent positive or negative electrode sheets, or the spacers can be continuously provided and provided between any adjacent positive or negative electrode sheets by folding.

[0082] In some embodiments, the electrode assembly 2 may be cylindrical, flat, or polygonal, etc.

[0083] The battery cell 300 may include a housing 1. The housing 1 is an assembly used to cooperate with the top cover assembly 13 to form the internal environment of the battery cell 300, wherein the formed internal environment can accommodate the electrode assembly 2, electrolyte (not shown in the figure), and other components. The housing 1 can be a steel housing, an aluminum housing, a plastic housing (such as polypropylene), a composite metal housing (such as a copper-aluminum composite housing 1), or an aluminum-plastic film, etc. In some embodiments, the housing 1 can be a sealed structure or a non-sealed structure. As an example, when the housing 1 is a non-sealed structure, the housing 1 serves to protect the electrode assembly 2, and a sealing bag is also included between the housing 1 and the electrode assembly 2, the sealing bag being used to encapsulate the electrode assembly 2 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the housing 1 is a sealed structure, it is used to encapsulate the electrode assembly 2 and electrolyte, etc.

[0084] As an example, the battery cell 300 can be a cylindrical battery cell 300, a prismatic battery cell 300, a pouch battery cell 300, or a battery cell 300 of other shapes. The prismatic battery cell 300 includes a prismatic battery cell 300, a blade-shaped battery cell 300, and a multi-prismatic battery, such as a hexagonal prismatic battery. There are no particular limitations in this application.

[0085] The housing 1 and the top cover assembly 13 can be independent components. One or more openings 12 can be provided on the housing 1, and one or more top cover assemblies 13 can close the openings 12 to form the internal environment of the battery cell 300. Optionally, the top cover assembly 13 and the housing 1 can also be integrated. Optionally, the top cover assembly 13 and the housing 1 can form a common connection surface before other components are inserted into the housing, and the top cover assembly 13 closes the housing 1 when it is necessary to encapsulate the interior of the housing 1.

[0086] In some embodiments, the electrode terminals can be disposed on the top cover assembly 13 or on the housing 1, and the electrode terminals are electrically connected to the tabs 22. The electrode terminals can be directly connected to the tabs 22 or indirectly connected to the tabs 22 through an adapter mechanism.

[0087] Please refer to Figures 5 to 9. The battery device 20 includes: a housing 200; a battery pack 100, located in the housing 200 and including a plurality of battery cells 300 arranged side by side along a first direction X, the plurality of battery packs 100 being arranged side by side along a second direction Y; a limiting member 400, located in the housing 200 and disposed on one side of the plurality of battery packs 100 in the first direction X, the limiting member 400 including a first receiving cavity 410; and a heat exchange member 500, located in the housing 200 and disposed on one side of at least one battery pack 100 in a third direction Z, the heat exchange member 500 including a second receiving cavity 510, the second receiving cavity 510 being interconnected with the first receiving cavity 410, the first direction X, the second direction Y and the third direction Z intersecting each other.

[0088] In this embodiment, the battery device 20 includes a housing 200, a battery pack 100, a limiting component 400, and a heat exchange component 500. The battery pack 100 is formed by multiple battery cells 300 arranged side-by-side along a first direction X, and is used to realize the energy storage function of the battery device 20. The limiting component 400 is disposed on one side of the battery pack 100 in the first direction X, and can provide a limiting effect on the battery pack 100, ensuring the stability of the relative position between the battery pack 100 and the housing 200. The heat exchange component 500 is disposed on one side of the battery cells 300 and provides heat exchange to the battery cells 300. The second receiving cavity 510 within the heat exchange component 500 is interconnected with the first receiving cavity 410 of the limiting component 400, so that the limiting component 400 not only provides a limiting function but also allows the heat exchange medium to flow, reducing the overall space occupied by the heat exchange device within the battery device 20, improving the space utilization rate within the housing 200, and thus increasing the energy density of the battery device 20.

[0089] Optionally, the limiting member 400 may be an expansion beam within the battery assembly 20. The battery assembly 20 may also include an end beam 220 disposed opposite to the limiting member 400 along a first direction X. The battery pack 100 is located between the limiting member 400 and the end beam 220. The limiting member 400 and the end beam 220 are used to provide opposing limiting forces to the battery pack 100 to ensure the stability of the relative position between the battery pack 100 and the housing 200.

[0090] Optionally, the housing 200 further includes a limiting beam 230 located on the side of the limiting member 400 opposite to the end beam 220. The limiting beam 230 and the limiting member 400 are spaced apart to form a clearance space 250, within which other components of the battery device 20 can be installed. Optionally, the housing 200 may also include two lateral beams 240 arranged opposite each other along the second direction Y, with the lateral beams 240 connecting the end beam 220 and the limiting beam 230. Optionally, the housing 200 further includes a base plate 260, which is connected to the limiting beam 230, the end beam 220, and the lateral beams. The battery cell 300 and the limiting member 400 are mounted on the base plate 260.

[0091] In some embodiments, as shown in Figures 5 to 9, the battery device 20 further includes a reinforcing member 600, which extends along a first direction X and is connected between the inner wall of the housing 200 and the limiting member 400. A plurality of reinforcing members 600 are spaced apart along a second direction Y. At least one reinforcing member 600 includes a third receiving cavity 610, and the third receiving cavity 610 is connected to the first receiving cavity 410.

[0092] In these embodiments, the inner wall of the housing 200 and the limiting component 400 are provided with reinforcing components 600, which can further improve the stability of the relative positions between the limiting component 400, the battery pack 100 and the housing 200, and improve the shock resistance of the battery device 20. The third receiving cavity 610 in the reinforcing component 600 is connected to the first receiving cavity 410, so that the heat exchange medium can circulate in the reinforcing component 600, which can further reduce the space occupied by the heat exchange device in the battery device 20, improve the utilization rate of the space in the housing 200, and thus improve the energy density of the battery device 20.

[0093] Optionally, the reinforcing member 600 can be connected between the limiting beam 230 and the limiting member 400. There can be one or more reinforcing members 600; when there are multiple reinforcing members 600, they can be spaced apart along the second direction Y.

[0094] Optionally, the limiting component 400, the heat exchange component 500, and the reinforcing component 600 can be combined to form the heat exchange device of the battery device 20. The limiting component 400 and the reinforcing component 600 in the heat exchange device can not only provide heat exchange medium for flow and heat exchange, but also improve the positional stability of the battery cell 300 and strengthen the structural strength of the battery device 20.

[0095] In some embodiments, the housing 200 is provided with at least one medium transport port 210, and the third receiving cavity 610 is connected to the outside of the housing 200 via the medium transport port 210.

[0096] In these embodiments, the medium transport port 210 is used to input or output the heat exchange medium, the third receiving cavity 610 is connected to the outside of the housing 200 via the medium transport port 210, so that the external heat exchange structure can enter the third receiving cavity 610 via the medium transport port 210, and the reinforcing member 600 can serve as the input or output port of the heat exchange medium of the heat exchange device.

[0097] Optionally, the third receiving cavity 610 can be directly connected to the medium transport port 210, and the heat exchange medium can be transported from the medium transport port 210 into the third receiving cavity 610. Alternatively, a portion of the reinforcing member 600 is disposed in and extends from the medium transport port 210, so that the heat exchange medium can flow into the third receiving cavity 610 via the portion of the reinforcing member 600 located within the medium transport port 210.

[0098] In some embodiments, as shown in Figures 8 to 11, the reinforcing member 600 includes a body portion 601 and a transmission portion 602 distributed along a third direction Z. The body portion 601 abuts against the inner wall of the housing 200 and the limiting member 400. A portion of the transmission portion 602 passes through the medium transport port 210. A third receiving cavity 610 is disposed in the transmission portion 602, and the transmission portion 602 has openings 12 at both ends in the first direction X that communicate with the third receiving cavity 610. Optionally, a portion of the transmission portion 602 protrudes from the body portion 601 toward the housing 200 and is located at the medium transport port 210.

[0099] In these embodiments, the body 601 of the reinforcing member 600 abuts against the inner wall of the housing 200 and the limiting member 400 to ensure the stability of the relative position between the limiting member 400 and the housing 200. The third receiving cavity 610 is disposed in the transmission section 602, and part of the transmission section 602 extends into the medium transport port 210 to communicate with the outside. Openings 12 are provided at both ends of the transmission section 602. One end opening 12 can communicate with the outside, and the other end opening 12 communicates with the first receiving cavity 410.

[0100] Optionally, the limiting member 400 has a third opening 440 on the side facing the transport section, and the transport section has a fourth opening 620 on the side facing the limiting member 400. The first receiving cavity 410 and the third receiving cavity 610 can communicate with each other through the third opening 440 and the fourth opening 620. Optionally, the transport section has a fifth opening 630 on the side away from the fourth opening 620. That is, one of the openings 12 at both ends of the transmission section 602 is the fourth opening 620, and the other is the fifth opening 630. The heat exchange medium can be transported into the third receiving cavity 610 or transported out of the third receiving cavity 610 through the fifth opening 630.

[0101] Optionally, the third opening 440 and the fourth opening 620 are arranged side by side along the first direction X, that is, the third opening 440 and the fourth opening 620 are at the same height relative to the bottom plate 260 of the box 200 in the third direction Z, so as to simplify the communication structure between the first receiving cavity 410 and the third receiving cavity 610.

[0102] Optionally, a reinforcing rib 6011 extending along the first direction X may be provided inside the main body 601 to further improve the structural strength of the reinforcing member 600. Optionally, a partition plate 603 extending along the first direction X is provided between the main body 601 and the transmission part 602. The partition plate 603 is used to separate the main body 601 and the third receiving cavity 610, so that the chamber in the main body 601 and the third receiving cavity 610 are independent of each other, reducing the volume of the third receiving cavity 610 and preventing the heat exchange medium from dissipating or absorbing too much heat in the third receiving cavity 610, which would affect the heat exchange effect of the heat exchange member 500 on the battery cell 300.

[0103] In some embodiments, the first receiving cavity 410 is located on the side of the limiting member 400 in the third direction Z, and at least a portion of the third receiving cavity 610 and at least a portion of the first receiving cavity 410 are arranged side by side along the first direction X.

[0104] In these alternative embodiments, at least a portion of the third receiving cavity 610 in the transmission part 602 and the first receiving cavity 410 in the limiting member 400 are arranged side by side along the first direction X, so that an opening 12 is provided at an adjacent position of the first receiving cavity 410 and the third receiving cavity 610 so that the first receiving cavity 410 and the third receiving cavity 610 can communicate with each other.

[0105] In some embodiments, as shown in Figures 5 to 11, the medium transport port 210 includes a medium inlet 211 and a medium outlet 212. At least two reinforcing members 600 include two first reinforcing members 60a. Both first reinforcing members 60a include a third receiving cavity 610. The third receiving cavity 610 of one of the first reinforcing members 60a is connected to the outside of the housing 200 via the medium inlet 211, and the third receiving cavity 610 of the other first reinforcing member 60a is connected to the outside of the housing 200 via the medium outlet 212.

[0106] In these embodiments, one of the two first reinforcing members 60a can serve as an input member for the heat exchange medium, and the other as an output member for the heat exchange medium. The heat exchange medium enters the third receiving cavity 610 through one of the first reinforcing members 60a, and is discharged through the other first reinforcing member 60a after flowing through the first receiving cavity 410 and the second receiving cavity 510, thereby realizing the circulating flow of the heat exchange medium.

[0107] In the above embodiment, the heat exchange medium can enter the third receiving cavity 610 through the fourth opening 620 of one of the first reinforcing members 60a, and enter the first receiving cavity 410 through the third opening 440. After entering the second receiving cavity 510, it flows out through the second receiving cavity 510, the first receiving cavity 410 and the other first reinforcing member 60a, forming a circulation loop of the heat exchange medium.

[0108] In some embodiments, as shown in Figures 6 and 7, at least two reinforcing members 600 further include a second reinforcing member 60b, and one or more second reinforcing members 60b are located between two first reinforcing members 60a.

[0109] In these embodiments, a second reinforcing member 60b, which is not used as a heat exchange medium input or output component, is disposed between two first reinforcing members 60a. The distance between the two first reinforcing members 60a is far enough to increase the flow distance of the heat exchange medium and improve the heat exchange effect.

[0110] Optionally, the number of second reinforcing members 60b can be one or more.

[0111] Optionally, the second reinforcing member 60b abuts between the inner wall of the housing 200 and the limiting member 400.

[0112] In some embodiments, as shown in Figures 8 to 11, the heat exchange component 500 includes a connecting section 520 and a heat exchange section 530. The connecting section 520 is located on the Z-direction side of the limiting component 400, and the heat exchange section 530 is located on the Z-direction side of the battery cell 300. The limiting component 400 has a first opening 420 on the side facing the connecting section 520, and the connecting section 520 has a second opening 521 on the side facing the limiting component 400. The first receiving cavity 410 and the second receiving cavity 510 are interconnected through the first opening 420 and the second opening 521.

[0113] In these embodiments, the connecting segment 520 of the heat exchange component 500 extends onto and covers part of the limiting component 400. The limiting component 400 has a first opening 420 facing the connecting segment 520, and the connecting segment 520 has a second opening 521 facing the limiting component 400, so that the first receiving cavity 410 and the second receiving cavity 510 can communicate with each other through the first opening 420 and the second opening 521.

[0114] In some embodiments, as shown in Figures 8 to 11, a reinforcing plate 430 is provided inside the limiting member 400. The reinforcing plate 430 divides the limiting member 400 into a plurality of sub-chambers distributed along the third direction Z. One of the plurality of sub-chambers facing the connecting section 520 is the first receiving cavity 410.

[0115] In these embodiments, the reinforcing plate 430 provided inside the limiting member 400 can improve the structural strength of the limiting member 400. One of the multiple sub-chambers facing the connecting section 520 is the first receiving chamber 410, which can reduce the distance between the first receiving chamber 410 and the second receiving chamber 510, reduce the flow distance of the heat exchange medium outside the heat exchange member 500, and improve the heat exchange effect.

[0116] Optionally, when the third receiving cavity 610 is located on the side of the limiting member 400 away from the base plate 260, that is, when the third receiving cavity 610 is located on the side of the limiting member 400 facing the connecting section 520, the third receiving cavity 610 can also be located on the side of the reinforcing member 600 away from the base plate 260, and the transmission part 602 is located on the side of the main body part 601 away from the base plate 260, so that the third receiving cavity 610 and the first receiving cavity 410 are arranged side by side along the first direction X, and the third opening 440 and the fourth opening 620 can be arranged correspondingly along the first direction X.

[0117] In some embodiments, as shown in Figures 8 to 12, the first receiving cavity 410 includes two independent first chambers 411; the second receiving cavity 510 includes two second chambers 511 distributed along the second direction Y, the two second chambers 511 are connected to each other at one end away from the limiting member 400 in the first direction X, and the second chambers 511 and the first chambers 411 are connected in a one-to-one correspondence.

[0118] In these embodiments, the first receiving cavity 410 includes two first chambers 411, and the second receiving cavity 510 includes two second chambers 511. One of the two first chambers 411 and the two second chambers 511 can serve as a medium input chamber and the other as a medium output chamber, so that the heat exchange medium can flow from one of the first chambers 411 into the two second chambers 511 and flow out from the other first chamber 411, forming a circulation loop for the heat exchange medium.

[0119] Optionally, the two first chambers 411 can be arranged side by side along the first direction X, or one of the two first chambers 411 can be located inside the other, and parts of one and the other can be arranged correspondingly along the third direction Z, so that the two first reinforcing members 60a can be directly connected to the two first chambers 411 in a one-to-one correspondence.

[0120] Optionally, the two first reinforcing members 60a and the two first chambers 411 are connected in a one-to-one correspondence. The heat exchange medium enters from the third receiving cavity 610 of one of the first reinforcing members 60a into one of the first chambers 411, one of the second chambers 511, another second chamber 511, another first chamber 411, and the third receiving cavity 610 of the other first reinforcing member 60a, and then flows out, forming a circulation loop for the heat exchange medium.

[0121] Optionally, a medium channel is formed between the reinforcing component 600, the limiting component 400, and the heat exchange component 500. This medium channel includes an inflow channel and an outflow channel, as shown in Figures 8 and 9. One set of third receiving chamber 610, first chamber 411, and second chamber 511 forms the inflow channel, and the two second chambers 511 are connected, as shown in Figures 10 and 11. Another set of second chambers 511, first chamber 411, and third receiving chamber 610 forms the outflow channel. Arrows in Figures 9 and 11 indicate the flow direction of the heat exchange medium.

[0122] In some embodiments, a pressure relief mechanism 131 is provided on the side of the battery cell 300 facing the heat exchange component 500; the heat exchange component 500 includes a heat exchange region 501 and a connection region 502 distributed along the second direction Y, the second chamber 511 is located in the heat exchange region 501, and the connection region 502 is provided with a clearance hole 540, the projection of the clearance hole 540 in the third direction Z and the projection of the pressure relief mechanism 131 in the third direction Z at least partially overlap.

[0123] In these embodiments, when a pressure relief mechanism 131 is provided on the battery cell 300 facing the heat exchange component 500, a clearance hole 540 is provided in the connection area 502 of the heat exchange component 500. The projections of the clearance hole 540 and the pressure relief mechanism 131 at least partially overlap, so that the gas of the pressure relief mechanism 131 can be discharged in time through the clearance hole 540.

[0124] Optionally, both the heat exchange section 530 and the connecting section 520 are located in the heat exchange region 501, and the heat exchange section 530 and the connecting section 520 are arranged side by side along the first direction X within the heat exchange region 501.

[0125] In some embodiments, as shown in Figures 5 and 6, two heat exchange regions 501 are respectively disposed on both sides of the connecting region 502 in the second direction Y, and each heat exchange region 501 is provided with a second chamber 511.

[0126] In these embodiments, heat exchange regions 501 are provided on both sides of the connection region 502, that is, a second receiving cavity 510 is provided on both sides of the connection region 502, which can provide heat exchange to the battery cell 300 and improve the heat exchange effect.

[0127] In some embodiments, as shown in Figures 5 and 6, the housing 200 includes an end beam 220 spaced apart from the limiting member 400 along a first direction X, the battery pack 100 is located between the end beam 220 and the limiting member 400, and one end of the heat exchange member 500 is connected to the limiting member 400 and the other end is connected to the end beam 220.

[0128] In these embodiments, one end of the heat exchange component 500 is fixed to the limiting component 400 and the other end is fixed to the end beam 220, which can improve the stability of the relative position of the heat exchange component 500 and the housing 200 and improve the shock resistance of the battery device 20.

[0129] Secondly, embodiments of this application provide an electrical device, including the battery device 20 described in the first aspect embodiment above.

[0130] Please refer to Figures 5 to 11. This application embodiment provides a battery device 20, including: a housing 200; a battery pack 100, located in the housing 200 and including a plurality of battery cells 300 arranged side-by-side along a first direction X, the plurality of battery packs 100 being arranged side-by-side along a second direction Y; a limiting member 400, located in the housing 200 and disposed on one side of the plurality of battery packs 100 in the first direction X, the limiting member 400 including a first receiving cavity 410; and a heat exchange member 500, located in the housing 200 and disposed on the battery cells 300. On the third direction Z side, the heat exchange component 500 includes a second receiving cavity 510, which is interconnected with the first receiving cavity 410. The first direction X, the second direction Y, and the third direction Z intersect each other. A reinforcing component 600 extends along the first direction X and is connected between the inner wall of the housing 200 and the limiting component 400. Multiple reinforcing components 600 are spaced apart along the second direction Y. At least one reinforcing component 600 includes a third receiving cavity 610, and the third receiving cavity 610 is interconnected with the first receiving cavity 410. The housing 200 is provided with at least one media transport port 210. The reinforcing member 600 includes a body portion 601 and a transmission portion 602 distributed along the third direction Z. The body portion 601 abuts against the inner wall of the housing 200 and the limiting member 400. A portion of the transmission portion 602 protrudes from the body portion 601 toward the housing 200 and is located at the media transport port 210. A third receiving cavity 610 is provided in the transmission portion 602, and the transmission portion 602 has openings 12 at both ends in the first direction X that communicate with the third receiving cavity 610. The media transport port 210 includes a media inlet 211 and a media outlet 212. At least two reinforcing members 600 include two first reinforcing members 60a. Both first reinforcing members 60a include a third receiving cavity 610. The third receiving cavity 610 of one first reinforcing member 60a communicates with the outside of the housing 200 via the media inlet 211, and the third receiving cavity 610 of the other first reinforcing member 60a communicates with the outside of the housing 200 via the media outlet 212. The heat exchange component 500 includes a connecting section 520 and a heat exchange section 530. The connecting section 520 is located on the Z-direction side of the limiting component 400, and the heat exchange section 530 is located on the Z-direction side of the battery cell 300. The limiting component 400 has a first opening 420 on the side facing the connecting section 520, and a second opening 521 on the side facing the limiting component 400. The first receiving cavity 410 and the second receiving cavity 510 are interconnected through the first opening 420 and the second opening 521. A reinforcing plate 430 is provided inside the limiting component 400, which divides the limiting component 400 into multiple sub-cavities distributed along the Z-direction. One of the multiple sub-cavities facing the connecting section 520 is the first receiving cavity 410.The first receiving cavity 410 includes two independent first chambers 411; the first receiving cavity 410 includes two second chambers 511 distributed along the second direction Y, the ends of the two second chambers 511 away from the limiting member 400 in the first direction X are interconnected, and the second chambers 511 and the first chambers 411 are connected one-to-one. A pressure relief mechanism 131 is provided on the side of the battery cell 300 facing the heat exchange member 500; the heat exchange member 500 includes a heat exchange region 501 and a connecting region 502 distributed along the second direction Y, the second receiving cavity 510 is located in the heat exchange region 501, and the connecting region 502 has a clearance hole 540, the projection of the clearance hole 540 in the third direction Z and the projection of the pressure relief mechanism 131 in the third direction Z at least partially overlap. The two heat exchange regions 501 are respectively located on both sides of the connecting region 502 in the second direction Y, and each heat exchange region 501 is provided with a second receiving cavity 510.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, comprising: Box; A battery pack, located in the housing and comprising a plurality of battery cells arranged side by side along a first direction, and a plurality of the battery packs arranged side by side along a second direction; A limiting component is located in the housing and disposed on one side of the plurality of battery packs in the first direction, the limiting component including a first receiving cavity; A heat exchange component is located in the housing and disposed on one side of at least one of the battery packs in a third direction. The heat exchange component includes a second receiving cavity that communicates with the first receiving cavity. The first direction, the second direction, and the third direction intersect each other.

2. The battery device of claim 1, further comprising: A reinforcing member extends along the first direction and connects between the inner wall of the housing and the limiting member. A plurality of reinforcing members are spaced apart along the second direction. At least one reinforcing member includes a third receiving cavity, and the third receiving cavity communicates with the first receiving cavity.

3. The battery device according to claim 2, wherein, The enclosure is provided with at least one medium transport port, and the third receiving cavity is connected to the outside of the enclosure via the medium transport port.

4. The battery device of claim 3, wherein, The reinforcing component includes a body portion and a transmission portion distributed along the third direction. The body portion abuts against the inner wall of the housing and the limiting component. Part of the transmission portion passes through the medium transport port. The third receiving cavity is disposed in the transmission portion, and the transmission portion has openings at both ends in the first direction that communicate with the third receiving cavity.

5. The battery device of claim 4, wherein, The first receiving cavity is located on one side of the limiting member in the third direction, and at least a portion of the third receiving cavity and at least a portion of the first receiving cavity are arranged side by side along the first direction.

6. The battery device of claim 3, wherein, The medium transport port includes a medium inlet and a medium outlet. At least two of the reinforcing components include two first reinforcing components. Both first reinforcing components include the third receiving cavity. The third receiving cavity of one of the first reinforcing components is connected to the outside of the housing via the medium inlet, and the third receiving cavity of the other first reinforcing component is connected to the outside of the housing via the medium outlet.

7. The battery device of claim 6, wherein, At least two of the reinforcing members further include a second reinforcing member, and one or more of the second reinforcing members are located between the two first reinforcing members.

8. The battery device according to claim 1, wherein, The heat exchange component includes a connecting section and a heat exchange section. The connecting section is located on the third-party side of the limiting component, and the heat exchange section is located on the third-party side of the battery cell. The limiting component has a first opening on the side facing the connecting segment, and the connecting segment has a second opening on the side facing the limiting component. The first receiving cavity and the second receiving cavity are interconnected through the first opening and the second opening.

9. The battery device of claim 8, wherein, The limiting component is provided with a reinforcing plate, which divides the limiting component into a plurality of sub-chambers distributed along the third direction. One of the plurality of sub-chambers facing the connecting section is the first receiving cavity.

10. The battery device according to claim 1, wherein, The first receiving cavity includes two independent first chambers; The second receiving cavity includes two second chambers distributed along the second direction. The two second chambers are connected to each other at the ends away from the limiting member in the first direction, and the second chambers and the first chamber are connected in a one-to-one correspondence.

11. The battery device according to claim 1, wherein, The battery cell is provided with a pressure relief mechanism on the side facing the heat exchange component; The heat exchange component includes a heat exchange area and a connection area distributed along the second direction. The second receiving cavity is located in the heat exchange area. The connection area has a clearance hole. The projection of the clearance hole in the third direction and the projection of the pressure relief mechanism in the third direction at least partially overlap.

12. The battery device of claim 11, wherein, The two heat exchange regions are respectively located on both sides of the connecting region in the second direction, and each heat exchange region is provided with the second receiving cavity.

13. The battery device of claim 1, wherein, The housing includes end beams spaced apart from the limiting component along the first direction. The battery pack is located between the end beams and the limiting component. One end of the heat exchange component is connected to the limiting component, and the other end is connected to the end beams.

14. An electrical device, comprising: Includes the battery device according to any one of claims 1-13.

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