Battery device, energy storage device and electric device

Abstract

Disclosed in the present application are a battery device, an energy storage device and an electric device. The battery device comprises: a battery cell; and a heat exchange component, which is located on at least one side of the battery cell in a first direction. The heat exchange component comprises a main body portion and a plurality of ribs arranged on at least one side of the main body portion facing the battery cell, wherein every two adjacent ribs are spaced apart from each other to form a heat exchange air duct and an air outlet and an air inlet respectively located at two ends of the heat exchange air duct, the air outlet being located on at least one side of the heat exchange component in a second direction, the air inlet being located on at least one side of the heat exchange component in a third direction, and the first direction, the second direction and the third direction intersecting one another. The air outlet and the air inlet are located on different sides, which allows air to fully flow in the heat exchange air duct, thereby improving a heat exchange effect and improving the safety performance of the battery device.

Description

Battery devices, energy storage devices and electrical appliances Cross-references to related applications

[0001] This application claims priority to Chinese patent application 202510103802.3, filed on January 22, 2025, entitled “Battery Device, Energy Storage Device and Electricity Consumption Device”, 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, an energy storage 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, battery devices generate a lot of heat during use, and how to quickly dissipate heat to improve the safety performance of battery devices has become an urgent technical problem to be solved. Summary of the Invention

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

[0006] In a first aspect, this application provides a battery device, which includes: a battery cell; and a heat exchange component located on at least one side of the battery cell in a first direction. The heat exchange component includes a main body and a plurality of ribs disposed on the main body facing at least one side of the battery cell. A heat exchange duct is formed between two adjacent ribs and an air outlet and an air inlet are respectively located at both ends of the heat exchange duct. The air outlet is located on at least one side of the heat exchange component in a second direction, and the air inlet is located on at least one side of the heat exchange component in a third direction. The first direction, the second direction, and the third direction intersect each other.

[0007] In the battery device provided in this application embodiment, the battery device includes a battery cell and a heat exchange component. The battery cell is used to store electrical energy, and the heat exchange component can provide heat to the battery cell, reducing the temperature of the battery cell during use and improving the safety performance of the battery device. Ribs are provided on the body of the heat exchange component, and heat exchange air channels are formed between adjacent ribs, allowing air to flow within the heat exchange air channels. The heat exchange air channels have an air inlet and an air outlet. The air inlet is located on one side of the heat exchange component in a third direction, and the air outlet is located on one side of the heat exchange component in a second direction. The air outlet and air inlet are located on different sides, allowing sufficient air flow within the heat exchange air channels, thereby improving the heat exchange effect and enhancing the safety performance of the battery device.

[0008] In some embodiments, multiple ribs are enclosed to form two or more heat exchange ducts, with the air inlet of at least one heat exchange duct facing the heat exchange component on one side in a third direction, and the air inlet of at least one heat exchange duct facing the heat exchange component on the other side in a third direction.

[0009] In these optional embodiments, multiple ribs enclose and form two or more heat exchange ducts. By setting multiple heat exchange ducts, more air can flow within the heat exchange component, thereby improving the heat exchange effect. The air inlets of at least two heat exchange ducts face two sides of the heat exchange component in a third direction, allowing air to enter the heat exchange ducts from different sides simultaneously. This reduces the air intake path, increases the air intake volume, and thus improves the heat dissipation effect.

[0010] In some embodiments, the rib includes a first rib, which includes intersecting and connected first and second segments. The first segment extends along a third direction, and the second segment extends along a second direction. The first segments of two adjacent first ribs enclose each other to form an air inlet, and the second segments of two adjacent first ribs enclose each other to form an air inlet. The two first ribs used to form the same air inlet are the same group of first ribs. The first segments of at least two groups of first ribs extend in opposite directions to form an air inlet such that the air inlets of at least two heat exchange ducts face the heat exchange components on both sides in the third direction.

[0011] In these alternative embodiments, the first rib includes a first segment and a second segment. An air inlet can be formed between adjacent first segments, and an air outlet can be formed between adjacent second segments. The first and second segments extend in different directions, such that the air inlet and air outlet are located on different sides of the heat exchange component. At least two sets of first segments extend in opposite directions, such that the air inlets can be located on two sides of the heat exchange component in a third direction.

[0012] In some embodiments, the plurality of ribs further includes a second rib, the second rib including a third segment extending along a third direction and a fourth segment extending along a second direction, the third segment being located on the side of the first segment of the plurality of first ribs away from the air outlet, the second segments of the plurality of first ribs being disposed on both sides of the fourth segment, wherein two adjacent first ribs and / or adjacent first ribs and second ribs enclose each other to form a heat exchange air duct, and the air inlets of the heat exchange air ducts located on both sides of the fourth segment are disposed opposite to each other.

[0013] In these alternative embodiments, the second rib includes a third segment and a fourth segment. The third segment can form two heat exchange ducts with different air inlet orientations with two first segments extending in opposite directions, and the fourth segment can form air outlets with the same air inlet orientation with two second segments located on both sides of it.

[0014] In some embodiments, the fourth segment includes a first sub-segment and two second sub-segments connected to the first sub-segment on the side facing the second segment. The two second sub-segments are inclined from the first sub-segment in opposite directions and are both connected to the third segment.

[0015] In these alternative embodiments, the fourth segment includes two second sub-segments that extend at an angle, which can accelerate the airflow within the heat exchange duct formed in the second sub-segments, thereby improving the heat exchange effect.

[0016] In some embodiments, multiple ribs are enclosed to form multiple heat exchange ducts, and the outlets of the multiple heat exchange ducts face the same side of the heat exchange component in the second direction.

[0017] In these alternative embodiments, the air outlet is located on the same side of the heat exchange component, so that the hot air after heat exchange is blown out toward the same side of the battery device, reducing the impact of the hot air on other components of the battery device.

[0018] In some embodiments, at least one rib encloses a medium cavity and a first opening and a second opening communicating with the medium cavity. The medium cavity is used to contain a heat exchange medium, and one of the first opening and the second opening is used for the heat exchange medium to flow in and the other is used for the heat exchange medium to flow out.

[0019] In these optional embodiments, at least one rib is provided with a medium cavity, which can be used to contain a heat exchange medium. The heat exchange medium can flow into the rib from one of the first opening and the second opening, and flow out of the rib from the other, realizing the circulation of the heat exchange medium. By adding a medium cavity, the heat exchange effect of the heat exchange component can be further improved, and the safety performance of the battery device can be enhanced.

[0020] In some embodiments, ribs are provided on one side of the main body, and a limiting groove is provided on the other side of the main body. Heat exchange components are provided on both sides of the battery cell in the first direction. A portion of the battery cell is located in the limiting groove of one of the heat exchange components, and the battery cell abuts against the ribs of the other heat exchange component.

[0021] In these optional embodiments, the heat exchange component is not only provided with a heat exchange air duct formed by ribs, but also with a limiting groove. Some battery cells can be located in the limiting groove, so that the heat exchange component can limit the battery cells, improve the stability of the relative position of the battery cells and the housing, improve the shock resistance of the battery device, and further improve the safety performance of the battery device.

[0022] In some embodiments, a first bottom plate and a first limiting plate are connected to the side of the main body away from the ribs. The first bottom plate, the first limiting plate and the main body form a limiting groove. The first bottom plate and the first limiting plate are located on both sides of the battery cell in the second direction.

[0023] In these alternative embodiments, the first base plate and the first limiting plate are disposed opposite to each other on both sides of the battery cell in the second direction, so that the first base plate and the first limiting plate can provide opposing limiting forces to the battery cell in the second direction, thereby improving the problem of battery cell swaying in the second direction.

[0024] In some embodiments, the first limiting plate includes an inner surface facing the limiting groove, the inner surface includes a guide surface, the guide surface is located on the side of the inner surface away from the main body, and is inclined in a direction away from the main body, and the guide surface is inclined in a direction away from the first bottom plate.

[0025] In these optional embodiments, a guide surface is provided on the first limiting plate, and the guide surface is inclined in the direction away from the first bottom support plate, that is, in the direction away from the main body, the distance between the first limiting plate and the first bottom support plate is increased, which facilitates the rapid assembly of the battery cell between the first limiting plate and the first bottom support plate.

[0026] In some embodiments, an elastic fin is provided on the side of the first base plate facing the limiting groove. One end of the elastic fin is connected to the first base plate, and the other end extends in a direction away from the first base plate. The angle between the extension path of the elastic fin and the surface of the first base plate facing the limiting groove is an acute angle.

[0027] In these optional embodiments, the first base plate is provided with elastic fins. The angle between the extension path of the elastic fins and the surface of the first base plate facing the limiting groove is an acute angle, allowing the end of the elastic fins away from the first base plate to deform in a direction close to the first base plate. On the one hand, the elastic fins and the first limiting plate can be interference-fitted with the battery cell to improve the positional stability of the battery cell. On the other hand, the deformable elastic fins can be adapted to battery cells of different sizes in the second direction, thereby increasing the applicability of the heat exchange component.

[0028] In some embodiments, two elastic fins are spaced apart along a third direction, and the two elastic fins are inclined from the first base plate in opposite directions.

[0029] In these alternative embodiments, the force stability and positional stability of the battery cell can be improved by providing two elastic fins. The two elastic fins extend from the first base plate in opposite directions, facilitating the rapid assembly of the battery cell between the first limiting plate and the first base plate.

[0030] In some embodiments, the surface of the first base plate facing the limiting groove is recessed to form a groove, one end of the elastic fin is connected to the groove, and the other end extends out of the groove.

[0031] In these optional embodiments, a groove is provided on the first base plate, and one end of the elastic fin is connected to the groove. During the fabrication of the heat exchange component, when the first base plate is cut to form the groove, the cut material can form the elastic fin, facilitating the rapid fabrication of the first base plate. The other end of the elastic fin extends out of the groove, allowing the elastic fin to provide a limiting force to the battery cell.

[0032] In some embodiments, the elastic fin includes a first side surface extending in a direction away from the first base plate, a first end surface located on the side away from the first base plate, and a first oblique cut surface connecting the first side surface and the first end surface. The first oblique cut surface is located on the side of the elastic fin away from the main body, and the angle between the extension path of the first oblique cut surface and the extension paths of the first side surface and the first end surface is an obtuse angle.

[0033] In these optional embodiments, a first oblique surface is provided on the side of the elastic fin away from the main body. The angle between the extension path of the first oblique surface and the extension paths of the first side surface and the first end surface is an obtuse angle, so that no sharp apex angle is formed on the elastic fin, which can improve the scratch damage of the elastic fin to the battery cell.

[0034] In some embodiments, the main body is connected to two first side plates on both sides in the third direction, and the first side plates, the first bottom support plate and the first limiting plate form a limiting groove.

[0035] In these alternative embodiments, by providing two first side plates opposite each other in a third direction on the main body, the two first side plates can provide a third-direction limiting position to the battery cells located in the limiting groove, thereby further improving the stability of the relative position of the battery cells and the housing.

[0036] In some embodiments, a second bottom support plate is provided on the side of the main body facing the rib, the second bottom support plate is located on one side of the battery cell in the second direction, wherein one of the second bottom support plate and the first bottom support plate is provided with a guide rail extending in the first direction, and the other is provided with a guide groove adapted to the guide rail, and in two heat exchange components located on both sides of the same battery cell, the guide rail of one of them is located in the guide groove of the other.

[0037] In these optional embodiments, on both sides of the same battery cell, a first base plate of one heat exchange component and a second base plate of another heat exchange component can cooperate with each other via guide rails and guide grooves to provide multi-directional limiting for the battery cell, securing the battery cell between two adjacent heat exchange components. This also reduces the distance between the heat exchange components and the battery cell, improving heat exchange efficiency and thus enhancing the safety performance of the battery device. Furthermore, the first and second base plates can move relative to each other along a first direction via guide rails and guide grooves, facilitating rapid installation and engagement of adjacent heat exchange components and improving the assembly efficiency of the battery device.

[0038] In some embodiments, the first base plate has a plurality of protrusions on the side away from the limiting groove, and a guide groove is formed between two adjacent protrusions; the second base plate has a guide rail on the side facing the battery cell.

[0039] In these optional embodiments, the bottom of the first base plate away from the battery cell is provided with a guide groove formed by two adjacent protrusions, and the side of the second base plate facing the battery cell is provided with a guide rail. When the first base plate and the second base plate cooperate with each other through the guide groove and the guide rail, at least a portion of the first base plate is located on the side of the second base plate facing the battery cell. At least a portion of the first base plate and the second base plate can be stacked on top of each other, which can provide more stable support to the battery cell.

[0040] In some embodiments, the second base plate is recessed on the side facing the battery cell to form a mating groove, and the guide rail is located in the mating groove. In two heat exchange components located on both sides of the same battery cell, a plurality of protrusions of one component are located in the mating groove of the other component.

[0041] In these alternative embodiments, the second base plate is provided with a mating groove, and multiple protrusions are located in the mating groove, which can further improve the stability of the relative position between the first base plate and the second base plate.

[0042] In some embodiments, the extension dimension of the guide rail in the second direction is greater than the depth of the guide groove, so that the facing surfaces of the first base plate and the second base plate are spaced apart.

[0043] In these alternative embodiments, due to the height of the guide rail, a gap can be formed between the first base plate and the second base plate under the support of the guide rail, allowing air to flow out from the gap, thereby increasing the air outlet efficiency and improving the heat exchange effect.

[0044] In some embodiments, the second base plate includes a limiting portion and a mating portion that are sequentially distributed in a direction away from the main body. The mating portion is connected to the limiting portion by a stepped surface. The mating portion is located on the side of the limiting portion away from the battery cell. The first base plate and the stepped surface are spaced apart, and the surfaces of the first base plate and the mating portion facing the battery cell are coplanar.

[0045] In these optional embodiments, the surfaces of the first base plate and the mating part facing the battery cell are coplanar, allowing them to jointly support the battery cell and improve its positional stability. The first base plate and the stepped surface are spaced apart, allowing air to flow between them, increasing airflow efficiency and improving heat exchange. The limiting part may be provided with a mating groove and guide rail, and the limiting part and the first base plate are stacked on top of each other.

[0046] In some embodiments, the main body is provided with an abutting portion on at least one side in the first direction, and the abutting portion abuts against the battery cell.

[0047] In these alternative embodiments, by providing an abutment portion, it is possible to provide a limiting position to the battery cell in the first direction.

[0048] In some embodiments, the angle between the extension path of the abutment portion and the surface of the main body portion is an acute angle or a right angle.

[0049] In these alternative embodiments, when the angle between the extension path of the abutment portion and the surface of the main body portion is an acute angle, the abutment portion can deform, and the free end of the abutment portion away from the main body portion can approach the main body portion, so that two adjacent heat exchange components can be adapted to battery cells of different thicknesses.

[0050] In some embodiments, the heat exchange component further includes a second side plate connected to at least one side of the main body in a third direction. The second side plate and the rib are located on the same side of the main body, and the second side plate is spaced apart from the battery cell to form an air inlet space between the second side plate and the battery cell. The air inlet and the air inlet space are connected.

[0051] In these alternative embodiments, the second side plate and the battery cell are spaced apart, so that an air intake space can be formed between the second side plate and the battery cell. The second side plate can guide the air so that more air can enter the heat exchange duct from the air intake space.

[0052] In some embodiments, a third side plate is provided on one side of the main body, and a groove extending in a first direction is provided on one of the third side plate and the inner wall of the box, and a rail body cooperating with the groove body is provided on the other side. The heat exchange component is movably connected to the box body in the first direction through the groove body and the rail body.

[0053] In these optional embodiments, a third side plate is provided on the main body. The third side plate and the housing can cooperate with each other through a groove and a rail, which can improve the stability of the relative position between the heat exchange component and the housing. The heat exchange component can slide relative to the housing in a first direction through the groove and the rail, which can improve the assembly efficiency between the heat exchange component and the housing.

[0054] In some embodiments, a fourth side plate is provided on one side of the main body, and a groove is provided on the surface of the fourth side plate away from the battery cell. A sliding part is provided on one side of the fourth side plate in a first direction. In two heat exchange components located on both sides of the same battery cell, the sliding part of one of them is located in the groove of the other.

[0055] In these optional embodiments, a fourth side plate is provided on one side of the main body, and a groove and a sliding part are provided on the fourth side plate, so that two adjacent heat exchange components can be connected to each other through the groove and the sliding part, thereby improving the connection strength between the two adjacent heat exchange components and improving the assembly speed of the two adjacent heat exchange components.

[0056] Secondly, embodiments of this application provide an energy storage device, including the battery device described in the first aspect embodiment above.

[0057] Thirdly, embodiments of this application provide an electrical device, including the battery device described in the first aspect embodiment. Attached Figure Description

[0058] 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:

[0059] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this application;

[0060] Figure 2 is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0061] Figure 3 is a partial structural schematic diagram of a battery device provided in an embodiment of this application;

[0062] Figure 4 is a bottom view of Figure 3;

[0063] Figure 5 is a partially enlarged structural schematic diagram of a battery device provided in an embodiment of this application;

[0064] Figure 6 is a bottom view of Figure 5;

[0065] Figure 7 is the front view of Figure 5;

[0066] Figure 8 is a schematic diagram of the structure of the heat exchange component of a battery device provided in an embodiment of this application;

[0067] Figure 9 is a schematic diagram of the heat exchange component of a battery device provided in an embodiment of this application from another perspective;

[0068] Figure 10 is a schematic diagram of the mating structure of the heat exchange components of a battery device provided in an embodiment of this application;

[0069] Figure 11 is a partially enlarged structural schematic diagram of Figure 10;

[0070] Figure 12 is a top view of Figure 3;

[0071] Figure 13 is a cross-sectional view at point AA in Figure 12;

[0072] Figure 14 is a magnified schematic diagram of the structure at point P in Figure 13.

[0073] 10. Vehicle; 110. Motor; 120. Controller; 20. Battery unit; 201. Battery pack; 2021. First housing; 2022. Second housing;

[0074] 1. Housing; 2. Individual battery cells; 3. Heat exchange components;

[0075] 31. Main body;

[0076] 32. Rib; 321. First rib; 321a. First segment; 321b. Second segment; 322. Second rib; 322a. Third segment; 322b. Fourth segment; 322b1. First sub-segment; 322b2. Second sub-segment; 323. Third rib;

[0077] 33. Heat exchange air duct; 331. Air inlet; 332. Air outlet;

[0078] 34. Medium cavity; 341. First opening; 342. Second opening; 343. Current collection component;

[0079] 35. Limiting groove; 351. First bottom support plate; 351a. Guide groove; 351b. Protrusion; 352. First limiting plate; 352a. Guide surface; 353. Elastic fin; 353a. First side surface; 353b. First end face; 353c. First oblique cut surface; 354. Groove; 355. First side plate;

[0080] 36. Second base plate; 361. Guide rail; 362. Mating groove; 363. Limiting part; 364. Mating part; 365. Stepped surface; 366. Inclined part;

[0081] 37. Contact part;

[0082] 381. Second side plate; 382. Third side plate; 382a. Groove; 383. Fourth side plate; 383a. Slide groove; 383b. Sliding part;

[0083] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] During the use of the battery device, the individual battery cells inside the device will generate heat. If heat is not dissipated in time, it will affect the safety performance of the individual battery cells.

[0092] To address the aforementioned issues, this application provides a battery device comprising a battery cell and a heat exchange component. The heat exchange component has a heat exchange duct with an air inlet and an air outlet located on different sides of the heat exchange component, thereby enabling sufficient airflow within the heat exchange duct to improve the heat exchange effect and enhance the safety performance of the battery device.

[0093] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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 described using electric vehicle 10 as an example.

[0100] 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.

[0101] 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.

[0102] 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 partial schematic diagram of the structure of a battery device 20 according to an embodiment of this application. Figure 4 is a bottom view of Figure 3; Figure 5 is a partially enlarged schematic diagram of the structure of a battery device 20 according to an embodiment of this application; Figure 6 is a bottom view of Figure 5; Figure 7 is a front view of Figure 5; Figure 8 is a schematic diagram of the structure of the heat exchange component 3 of the battery device 20 according to an embodiment of this application.

[0103] Please refer to Figures 2 to 8 together. This application provides a battery device 20, which includes: a battery cell 2; and a heat exchange component 3 located on at least one side of the battery cell 2 in a first direction X. The heat exchange component 3 includes a main body 31 and a plurality of ribs 32 disposed on the main body 31 facing at least one side of the battery cell 2. A heat exchange air duct 33 is formed between two adjacent ribs 32 and an air outlet 332 and an air inlet 331 are located at both ends of the heat exchange air duct 33. The air outlet 332 is located on at least one side of the heat exchange component 3 in a second direction Y, and the air inlet 331 is located on at least one side of the heat exchange component 3 in a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other.

[0104] In the battery device 20 provided in this application embodiment, the battery device 20 includes a battery cell 2 and a heat exchange component 3. The battery cell 2 is used to store electrical energy, and the heat exchange component 3 can provide heat exchange to the battery cell 2, reducing the temperature of the battery cell 2 during use and improving the safety performance of the battery device 20. Ribs 32 are provided on the body of the heat exchange component 3, and heat exchange air ducts 33 are formed between adjacent ribs 32, allowing air to flow within the heat exchange air ducts 33. The heat exchange air duct 33 has an air inlet 331 and an air outlet 332. The air inlet 331 is located on the side of the heat exchange component 3 in the third direction Z, and the air outlet 332 is located on the side of the heat exchange component 3 in the second direction Y. The air outlet 332 and the air inlet 331 are located on different sides, allowing air to flow fully within the heat exchange air duct 33, thereby improving the heat exchange effect and enhancing the safety performance of the battery device 20.

[0105] Optionally, the battery device 20 also includes a housing 1, with the battery cells 2 and heat exchange components 3 located within the housing 1. The housing 1 provides protection for the battery cells 2 and the heat exchange components 3. In some alternative embodiments, the battery device 20 may also exclude the housing 1, with the battery cells 2 and heat exchange components 3 combined to form an energy storage device.

[0106] Optionally, when the battery assembly 20 includes a housing 1, the housing 1 includes an upper housing 1 and a lower housing 1. As an example, the housing 1 may include a first housing 2021 and a second housing 2022. The first housing 2021 and the second housing 2022 are fastened together, forming a closed space inside the housing 1 to house the battery pack 201. Here, "closed" refers to covering or closing, and can be either sealed or unsealed.

[0107] Optionally, multiple battery cells 2 are arranged side-by-side along the first direction X to form a battery pack 201, that is, the battery pack 201 is located inside the housing 1, and the battery pack 201 includes multiple battery cells 2 arranged side-by-side along the first direction X. Optionally, multiple battery cells 2 can also be directly arranged inside the housing 1 without forming a battery pack 201.

[0108] In some embodiments, the battery device 20 may be a battery pack, which includes a housing 1 and one or more battery cells 2, the battery cells 2 being housed within the housing 1. As an example, multiple battery cells 2 may be housed within the housing 1 by being directly fixed to the housing 1.

[0109] Optionally, as shown in Figure 5, the battery cell 2 includes two first side surfaces 353a arranged side-by-side along a first direction X, and the heat exchange component 3 is disposed on at least one side surface 353a. Optionally, the area of ​​the first side surface 353a is larger than the area of ​​the other side surfaces of the battery cell 2, that is, the first side surface 353a is the larger surface of the battery cell 2. The heat exchange component 3 is disposed on the larger surface of the battery cell 2, which can increase the heat exchange area between the heat exchange component 3 and the battery cell 2, thereby improving the heat exchange effect.

[0110] Optionally, the side of the rib 32 away from the main body 31 can abut against the battery cell 2.

[0111] In some embodiments, as shown in FIG8, a plurality of ribs 32 surround to form two or more heat exchange ducts 33, at least one heat exchange duct 33 has an air inlet 331 facing the heat exchange component 3 on the third direction Z side, and at least one heat exchange duct 33 has an air inlet 331 facing the heat exchange component 3 on the other side of the third direction Z, that is, at least two heat exchange ducts 33 have air inlets 331 facing the heat exchange component 3 on both sides of the third direction Z.

[0112] In these optional embodiments, multiple ribs 32 enclose two or more heat exchange ducts 33. By setting multiple heat exchange ducts 33, more air can flow within the heat exchange component 3, thereby improving the heat exchange effect. The air inlets 331 of at least two heat exchange ducts 33 face both sides of the heat exchange component 3, allowing air to enter the heat exchange ducts 33 simultaneously from different sides. This reduces the air intake path, increases the air intake volume, and thus improves the heat dissipation effect.

[0113] Optionally, as shown in Figure 8, at least some of the heat exchange ducts 33 are symmetrically arranged about the axis extending along the second direction Y, so that the air inlets 331 can be arranged opposite each other in the third direction Z.

[0114] Optionally, the dimensions of the multiple heat exchange ducts 33 can be the same or different. For example, two heat exchange ducts 33 with air inlets 331 facing away from each other and symmetrically arranged have the same size and shape. The dimensions and shapes of multiple heat exchange ducts 33 with air inlets 331 located on the same side of the heat exchange component 3 can be different.

[0115] In some embodiments, as shown in FIG8, the rib 32 includes a first rib 321, the first rib 321 including intersecting and connected first segments 321a and second segments 321b, the first segment 321a extending along a third direction Z, the second segment 321b extending along a second direction Y, the first segments 321a of two adjacent first ribs 321 enclose to form an air inlet 331, the second segments 321b of two adjacent first ribs 321 enclose to form an air inlet 331, wherein the two first ribs 321 used to form the same air inlet 331 are the same group of first ribs 321, and the first segments 321a of at least two groups of first ribs 321 extend in opposite directions to form such that the air inlets 331 of at least two heat exchange ducts 33 face the heat exchange components 3 on both sides of the third direction Z.

[0116] In these optional embodiments, the first rib 321 includes a first segment 321a and a second segment 321b. An air inlet 331 can be formed between adjacent first segments 321a, and an air outlet 332 can be formed between adjacent second segments 321b. The first segments 321a and the second segments 321b extend in different directions, such that the air inlet 331 and the air outlet 332 are located on different sides of the heat exchange component 3. At least two sets of first segments 321a extend in opposite directions, such that the air inlet 331 can be located on both sides of the heat exchange component 3 in the third direction Z.

[0117] Optionally, the first rib 321 is L-shaped and has a first segment 321a and a second segment 321b. The first segment 321a and the second segment 321b can be connected by a right-angle structure. Alternatively, an arc-shaped segment is provided between the first segment 321a and the second segment 321b, and the first segment 321a and the second segment 321b are smoothly connected by the arc-shaped segment to reduce the air resistance in the heat exchange duct 33, accelerate airflow, and improve heat exchange efficiency.

[0118] Optionally, as shown in Figure 8, the shapes of the multiple ribs 32 can be the same or different. For example, the multiple ribs 32 may also include a third rib 323, which can be extended in the second direction Y, so that the two heat exchange ducts 33 located on both sides of the third rib 323 can share a larger air outlet 332. Optionally, the end of the third rib 323 can be connected to an arc-shaped segment, which bends and extends toward the air outlet 332 to provide good guidance.

[0119] In some embodiments, as shown in FIG8, the plurality of ribs 32 further include a second rib 322. The second rib 322 includes a third segment 322a extending along a third direction Z and a fourth segment 322b extending along a second direction Y. The third segment 322a is located on the side of the first segment 321a of the plurality of first ribs 321 away from the air outlet 332. The second segments 321b of the plurality of first ribs 321 are respectively disposed on both sides of the fourth segment 322b. The heat exchange air duct 33 is formed between two adjacent first ribs 321 and / or adjacent first ribs 321 and second ribs 322. The air inlets 331 of the heat exchange air ducts 33 located on both sides of the fourth segment 322b are arranged opposite to each other.

[0120] In these alternative embodiments, the second rib 322 includes a third segment 322a and a fourth segment 322b. The third segment 322a can form an air inlet 331 with two opposing first segments 321a, facing two heat exchange ducts 33. The fourth segment 322b can form an air outlet 332 with two second segments 321b located on both sides of it, facing the same direction.

[0121] Optionally, the third segment 322a of the second rib 322 can be set to correspond to the two first segments 321a located on both sides of the fourth segment 322b, that is, the extension length of the third segment 322a in the second direction Y is greater than or equal to the sum of the extension lengths of the two first segments 321a in the second direction Y, so that the same third segment 322a can form two heat exchange ducts 33 with opposite air inlets 331 with the first segments 321a located on both sides of the fourth segment 322b.

[0122] In some embodiments, as shown in FIG8, the fourth segment 322b includes a first sub-segment 322b1 and two second sub-segments 322b2 connected to the first sub-segment 322b1 on the side facing the second segment 321b. The two second sub-segments 322b2 are inclined from the first sub-segment 322b1 in opposite directions and are both connected to the third segment 322a.

[0123] In these alternative embodiments, the fourth segment 322b includes two second sub-segments 322b2, which extend at an angle to accelerate the airflow within the heat exchange duct 33 formed by the second sub-segments 322b2, thereby improving the heat exchange effect.

[0124] Optionally, the two second sub-segments 322b2 and part of the third segment 322a can enclose a triangular space, which can also improve the structural strength of the heat exchange component 3.

[0125] Optionally, multiple first ribs 321 are respectively disposed on both sides of the first sub-segment 322b1 in the second direction Y. The first sub-segment 322b1 and the second sub-segments 321b located on both sides thereon enclose to form a heat exchange air duct 33 and an air outlet 332.

[0126] In some embodiments, as shown in FIG8, a plurality of ribs 32 are arranged to form a plurality of heat exchange ducts 33, and the air outlets 332 of the plurality of heat exchange ducts 33 face the same side of the heat exchange component 3 in the second direction Y.

[0127] In these alternative embodiments, the air outlet 332 is located on the same side as the heat exchange component 3, so that the hot air after heat exchange is blown out toward the same side of the battery device 20, reducing the impact of the hot air on other components of the battery device 20.

[0128] Optionally, the battery cell 2 includes a top cover assembly located on its third-direction Z side, with the air outlet 332 facing away from the top cover assembly. The top cover assembly typically houses components such as flexible circuit boards, sampling circuits, and electrode terminals. The air outlet 332 facing away from the top cover assembly helps mitigate the damage to these components caused by airflow.

[0129] In some embodiments, please refer to Figures 8 to 11 together, at least one rib 32 surrounds to form a medium cavity 34 and a first opening 341 and a second opening 342 communicating with the medium cavity 34. The medium cavity 34 is used to contain heat exchange medium, and one of the first opening 341 and the second opening 342 is used for heat exchange medium to flow in and the other is used for heat exchange medium to flow out.

[0130] In these optional embodiments, at least one rib 32 is provided with a medium cavity 34, which can be used to contain a heat exchange medium. The heat exchange medium can flow into the rib 32 from one of the first opening 341 and the second opening 342, and flow out of the rib 32 from the other, realizing the circulation of the heat exchange medium. By adding the medium cavity 34, the heat exchange effect of the heat exchange component 3 can be further improved, and the safety performance of the battery device 20 can be improved.

[0131] Optionally, the first opening 341 is the medium inlet, and the second opening 342 is the medium outlet. The first opening 341 and the air inlet 331 can be located on the same side or opposite side of the heat exchange component 3, and the second opening 342 and the air outlet 332 can be located on the same side or opposite side of the heat exchange component 3.

[0132] Optionally, in the direction from the air inlet 331 to the air outlet 332, the end of the third rib 323 does not extend to the air outlet 332, so the end of the third rib 323 is difficult to connect with the outside, and the medium cavity 34 may not be provided on the third rib 323.

[0133] Optionally, the first segment 321a of the first rib 321 is located at the air inlet 331, and the second segment 321b is located at the air outlet 332. The first rib 321 can form the aforementioned medium cavity 34, with the first opening 341 and the second opening 342 located at both ends of the first rib 321 in its extending direction. The second rib 322 can also form the aforementioned medium cavity 34, with the two first openings 341 respectively located at both ends of the third segment 322a in the second direction Y, and the second opening 342 located at the end of the fourth segment 322b opposite to the third segment 322a.

[0134] Optionally, as shown in Figure 2, the battery device 20 further includes a current collector 343, which is connected to the first opening 341 or the second opening 342, and the current collector 343 and the medium cavity 34 can realize the flow circulation of the heat exchange medium.

[0135] In some embodiments, as shown in Figures 5 to 9, a rib 32 is provided on one side of the main body 31, and a limiting groove 35 is provided on the other side of the main body 31. A heat exchange component 3 is provided on both sides of the battery cell 2 in the first direction X. A portion of the battery cell 2 is located in the limiting groove 35 of one of the heat exchange components 3, and the battery cell 2 abuts against the rib 32 of the other heat exchange component 3.

[0136] In these optional embodiments, the heat exchange component 3 is not only provided with a heat exchange air duct 33 formed by the ribs 32, but also with a limiting groove 35. Some of the battery cells 2 can be located in the limiting groove 35, so that the heat exchange component 3 can limit the battery cells 2, improve the stability of the relative position of the battery cells 2 and the housing 1, improve the shock resistance of the battery device 20, and further improve the safety performance of the battery device 20.

[0137] Optionally, the ribs 32 and the limiting grooves 35 are respectively disposed on both sides of the main body 31. One side of the heat exchange component 3 is used to provide heat dissipation to the battery cell 2, and the other side is used to provide a limiting position for the battery cell 2.

[0138] In some embodiments, as shown in Figures 5 to 9, the main body 31 is connected to a first bottom support plate 351 and a first limiting plate 352 on the side away from the rib 32. The first bottom support plate 351, the first limiting plate 352 and the main body 31 enclose a limiting groove 35. The first bottom support plate 351 and the first limiting plate 352 are located on both sides of the battery cell 2 in the second direction Y.

[0139] In these optional embodiments, the first base plate 351 and the first limiting plate 352 are disposed opposite to each other on both sides of the battery cell 2 in the second direction Y, so that the first base plate 351 and the first limiting plate 352 can provide the battery cell 2 with opposing limiting forces in the second direction Y, thereby improving the swaying problem of the battery cell 2 in the second direction Y.

[0140] Optionally, the first limiting plate 352 may be disposed at the end of the main body 31 away from the first bottom support plate 351 in the second direction Y. The number of first limiting plates 352 may be one or more. For example, two or more first limiting plates 352 may be distributed at intervals along the third direction Z.

[0141] In some embodiments, as shown in FIG9, the first limiting plate 352 includes an inner surface facing the limiting groove 35. The inner surface includes a guide surface 352a, which is located on the side of the inner surface away from the main body 31. The guide surface 352a is inclined in a direction away from the main body 31.

[0142] In these optional embodiments, the first limiting plate 352 is provided with a guide surface 352a, and the guide surface 352a is inclined in the direction away from the first bottom support plate 351, that is, in the direction away from the main body 31, the distance between the first limiting plate 352 and the first bottom support plate 351 is increased, which facilitates the quick assembly of the battery cell 2 between the first limiting plate 352 and the first bottom support plate 351.

[0143] Optionally, the first limiting plate 352 includes an outer surface that is opposite to the limiting groove 35, and the outer surface of the first limiting plate 352 and the end face of the main body 31 that is opposite to the first bottom support plate 351 are coplanar, so as to improve the problem of unevenness of the outer surface of the heat exchange component 3.

[0144] In some embodiments, as shown in FIG9, an elastic fin 353 is provided on the side of the first base plate 351 facing the limiting groove 35. One end of the elastic fin 353 is connected to the first base plate 351, and the other end extends in a direction away from the first base plate 351. The angle between the extension path of the elastic fin 353 and the surface of the first base plate 351 facing the limiting groove 35 is an acute angle.

[0145] In these optional embodiments, the first base plate 351 is provided with elastic fins 353. The angle between the extension path of the elastic fins 353 and the surface of the first base plate 351 facing the limiting groove 35 is an acute angle, so that the end of the elastic fins 353 away from the first base plate 351 can deform in the direction close to the first base plate 351. On the one hand, the elastic fins 353 and the first limiting plate 352 can be interference-fitted with the battery cell 2 to improve the positional stability of the battery cell 2. On the other hand, the deformable elastic fins 353 can be adapted to battery cells 2 with different sizes in the second direction Y, which can improve the applicability of the heat exchange component 3.

[0146] In some embodiments, as shown in FIG9, two elastic fins 353 are spaced apart along a third direction Z, and the two elastic fins 353 are inclined from the first base plate 351 in opposite directions.

[0147] In these alternative embodiments, by providing two elastic fins 353, the stress stability and positional stability of the battery cell 2 can be improved. The two elastic fins 353 extend from the first base plate 351 in opposite directions, facilitating the rapid assembly of the battery cell 2 between the first limiting plate 352 and the first base plate 351.

[0148] In some embodiments, as shown in FIG9, the surface of the first base plate 351 facing the limiting groove 35 is recessed to form a groove 354, one end of the elastic fin 353 is connected to the groove 354, and the other end extends out of the groove 354.

[0149] In these optional embodiments, a groove 354 is provided on the first base plate 351, and one end of the elastic fin 353 is connected to the groove 354. During the fabrication of the heat exchange component 3, when the first base plate 351 is cut to form the groove 354, the cut material can form the elastic fin 353, facilitating the rapid fabrication of the first base plate 351. The other end of the elastic fin 353 extends out of the groove 354, allowing the elastic fin 353 to provide a limiting force to the battery cell 2.

[0150] Optionally, the projection of the elastic fin 353 along the second direction Y falls within the projection of the groove 354 along the second direction Y. This allows the elastic fin 353 to be accommodated within the groove 354 during extreme deformation, thereby increasing the deformation amount of the elastic fin 353.

[0151] In some embodiments, as shown in FIG9, the elastic fin 353 includes a first side surface 353a extending in a direction away from the first base plate 351, a first end surface 353b located on the side away from the first base plate 351, and a first oblique surface 353c connecting the first side surface 353a and the first end surface 353b. The first oblique surface 353c is located on the side of the elastic fin 353 away from the main body 31, and the angle between the extension path of the first oblique surface 353c and the extension paths of the first side surface 353a and the first end surface 353b is an obtuse angle.

[0152] In these optional embodiments, the elastic fin 353 has a first oblique surface 353c on the side opposite to the main body 31. The angle between the extension path of the first oblique surface 353c and the extension paths of the first side surface 353a and the first end surface 353b is an obtuse angle, so that no sharp apex angle is formed on the elastic fin 353, which can improve the scratch damage of the elastic fin 353 to the battery cell 2.

[0153] In some embodiments, as shown in FIG9, the main body 31 is connected to the first side plate 355 on both sides in the third direction Z, and the first side plate 355, the first bottom support plate 351 and the first limiting plate 352 surround to form a limiting groove 35.

[0154] In these optional embodiments, by providing two first side plates 355 opposite each other in the third direction Z on the main body 31, the two first side plates 355 can provide a limiting position in the third direction Z for the part of the battery cell 2 located in the limiting groove 35, thereby further improving the stability of the relative position of the battery cell 2 and the housing 1.

[0155] Optionally, the first side plate 355 and the first bottom support plate 351 can be integrally formed. Optionally, the first side plate 355 and the first bottom support plate 351 are smoothly connected.

[0156] In some embodiments, as shown in Figures 5 to 11, a second bottom support plate 36 is provided on the side of the main body 31 facing the rib 32. The second bottom support plate 36 is located on the side of the battery cell 2 in the second direction Y. One of the second bottom support plate 36 and the first bottom support plate 351 is provided with a guide rail 361 extending along the first direction X, and the other is provided with a guide groove 351a adapted to the guide rail 361. In the two heat exchange components 3 located on both sides of the same battery cell 2, the guide rail 361 of one is located in the guide groove 351a of the other.

[0157] In these optional embodiments, on both sides of the same battery cell 2, the first base plate 351 of one heat exchange component 3 and the second base plate 36 of the other heat exchange component 3 can cooperate with each other via guide rail 361 and guide groove 351a, thereby providing multi-directional limiting to the battery cell 2, securing the battery cell 2 between two adjacent heat exchange components 3, reducing the distance between the heat exchange component 3 and the battery cell 2, improving the heat exchange effect, and thus improving the safety performance of the battery device 20. Furthermore, the first base plate 351 and the second base plate 36 can move relative to each other along the first direction X via guide rail 361 and guide groove 351a, facilitating quick installation and engagement of two adjacent heat exchange components 3, and improving the assembly efficiency of the battery device 20.

[0158] Optionally, the two second base plates 36 are spaced apart along the third direction Z to allow air to flow out between the two second base plates 36.

[0159] In some embodiments, as shown in Figures 5 to 11, a plurality of protrusions 351b are provided on the side of the first bottom plate 351 away from the limiting groove 35, and a guide groove 351a is formed between two adjacent protrusions 351b; a guide rail 361 is provided on the side of the second bottom plate 36 facing the battery cell 2.

[0160] In these optional embodiments, the first base plate 351 is provided with a guide groove 351a formed by two adjacent protrusions 351b on the bottom away from the battery cell 2, and the second base plate 36 is provided with a guide rail 361 on the side facing the battery cell 2. When the first base plate 351 and the second base plate 36 cooperate with each other through the guide groove 351a and the guide rail 361, at least a portion of the first base plate 351 is located on the side of the second base plate 36 facing the battery cell 2, and at least a portion of the first base plate 351 and the second base plate 36 can be stacked on top of each other, which can provide more stable support to the battery cell 2.

[0161] In some embodiments, as shown in Figures 5 to 11, the second bottom plate 36 is recessed on the side facing the battery cell 2 to form a mating groove 362, and the guide rail 361 is located in the mating groove 362. In two heat exchange components 3 located on both sides of the same battery cell 2, a plurality of protrusions 351b of one of them are located in the mating groove 362 of the other.

[0162] In these alternative embodiments, the second base plate 36 is provided with a mating groove 362, and a plurality of protrusions 351b are located in the mating groove 362, which can further improve the stability of the relative position between the first base plate 351 and the second base plate 36.

[0163] In some embodiments, as shown in Figures 5 to 14, the extension dimension of the guide rail 361 in the second direction Y is greater than the depth of the guide groove 351a, so that the surfaces of the first base plate 351 and the second base plate 36 facing each other are spaced apart.

[0164] In these alternative embodiments, due to the height of the guide rail 361, a gap can be formed between the first base plate 351 and the second base plate 36 under the support of the guide rail 361, allowing air to flow out from the gap, thereby increasing the air outlet efficiency and improving the heat exchange effect.

[0165] Optionally, the height of the guide rail 361 can be increased so that the guide rail 361 protrudes beyond the mating groove 362. Alternatively, the depth of the guide groove 351a can be reduced, for example by adding a padding layer inside the guide groove 351a, so that the extension dimension of the guide rail 361 in the second direction Y is greater than the depth of the guide groove 351a.

[0166] In this embodiment of the application, there are three protrusions 351b, and a guide groove 351a is formed between the two middle protrusions 351b. By providing a pad in the guide groove 351a, the depth of the guide groove 351a is less than the depth of the groove between the two protrusions 351b on both sides, so that the extension dimension of the guide rail 361 in the second direction Y is greater than the depth of the guide groove 351a.

[0167] In some embodiments, as shown in Figures 5 to 11, the second base plate 36 includes a limiting portion 363 and a mating portion 364 sequentially distributed in a direction away from the main body portion 31. The mating portion 364 is connected to the limiting portion 363 through a stepped surface 365. The mating portion 364 is located on the side of the limiting portion 363 away from the battery cell 2. The first base plate 351 and the stepped surface 365 are spaced apart, and the surfaces of the first base plate 351 and the mating portion 364 facing the battery cell 2 are coplanar.

[0168] In these optional embodiments, the first base plate 351 and the mating part 364 are coplanar with the surfaces of the battery cell 2, so that the first base plate 351 and the mating part 364 can jointly support the battery cell 2, improving the positional stability of the battery cell 2. The first base plate 351 and the stepped surface 365 are spaced apart, allowing air to flow out between the first base plate 351 and the stepped surface 365, which can increase the air outlet efficiency and improve the heat exchange effect. The limiting part 363 may be provided with a mating groove 362 and a guide rail 361, etc., and the limiting part 363 and the first base plate 351 are stacked on top of each other.

[0169] Optionally, the sum of the extension length of the first base plate 351 in the first direction X and the extension length of the limiting part 363 in the first direction X can be less than the thickness of the battery cell 2. Through the abutment action of the battery cell 2, the first base plate 351 and the step surface 365 are spaced apart.

[0170] Optionally, the second base plate 36 further includes an inclined portion 366. In two adjacent second base plates 36, the inclined portion 366 is located on the side where the limiting portion 363 and the mating portion 364 face each other. The inclined portion 366 has an inclined surface facing the battery cell 2. The inclined surface is inclined in a direction away from the main body portion 31 to increase the area of ​​the air outlet 332. In some embodiments, as shown in Figures 8 and 9, the main body portion 31 is provided with an abutting portion 37 on at least one side in the first direction X, and the abutting portion 37 abuts against the battery cell 2.

[0171] In these alternative embodiments, by providing the abutment portion 37, the battery cell 2 can be limited in the first direction X.

[0172] Optionally, when the abutment portion 37 is located on the side where the rib 32 is located, the abutment portion 37 may be located on the side of the plurality of ribs 32 away from the second bottom plate 36, so as to improve the impact of the abutment portion 37 on the heat dissipation channel.

[0173] Optionally, when the main body 31 is provided with abutment portions 37 on both sides of the first direction X, the projections of the abutment portions 37 on both sides of the main body 31 along the first direction X overlap. When the battery cell 2 is located between two adjacent heat exchange components 3, the abutment portions 37 can provide a limiting force to the battery cell 2 from the same height, thereby improving the force balance of the battery cell 2.

[0174] In some embodiments, the angle between the extension path of the abutment portion 37 and the surface of the main body portion 31 is an acute angle or a right angle.

[0175] In these alternative embodiments, when the angle between the extension path of the abutment portion 37 and the surface of the main body portion 31 is an acute angle, the abutment portion 37 can deform, and the free end of the abutment portion 37 away from the main body portion 31 can approach the main body portion 31, so that two adjacent heat exchange components 3 can be adapted to battery cells 2 of different thicknesses.

[0176] In some embodiments, as shown in Figures 5 to 11, the heat exchange component 3 further includes a second side plate 381 connected to at least one side of the main body 31 in the third direction Z. The second side plate 381 and the rib 32 are located on the same side of the main body 31, and the second side plate 381 is spaced apart from the battery cell 2 to form an air inlet space between the second side plate 381 and the battery cell 2. The air inlet 331 is connected to the air inlet space.

[0177] In these alternative embodiments, the second side plate 381 and the battery cell 2 are spaced apart, so that an air intake space can be formed between the second side plate 381 and the battery cell 2, and the first side plate 355 can provide guidance to the air, so that more air can enter the heat exchange duct 33 from the air intake space.

[0178] Optionally, when the reinforcing rib 32 is provided with a dielectric cavity 34 and the battery device 20 includes a current collector 343, the current collector 343 can communicate with the dielectric cavity 34 from the air inlet space.

[0179] Optionally, the second side plate 381 is obliquely cut away from the battery cell 2 in a direction away from the second bottom plate 36, so as to form an air intake channel on the side of the second side plate 381 away from the second bottom plate 36.

[0180] In some embodiments, as shown in Figures 5 to 11, a third side plate 382 is provided on one side of the main body 31. A groove 382a extending along the first direction X is provided on one of the third side plate 382 and the inner wall of the housing 1, and a rail body cooperating with the groove 382a is provided on the other side. The heat exchange component 3 is movably connected to the housing 1 along the first direction X through the groove 382a and the rail body.

[0181] In these optional embodiments, a third side plate 382 is provided on the main body 31. The third side plate 382 and the housing 1 can cooperate with each other through a groove 382a and a rail, which can improve the stability of the relative position between the heat exchange component 3 and the housing 1. The heat exchange component 3 can slide relative to the housing 1 along the first direction X through the groove 382a and the rail, which can improve the assembly efficiency between the heat exchange component 3 and the housing 1.

[0182] In some embodiments, as shown in Figures 5 to 11, a fourth side plate 383 is provided on one side of the main body 31. The fourth side plate 383 is provided with a groove 383a on the surface opposite to the battery cell 2. The fourth side plate 383 is provided with a sliding part 383b on one side in the first direction X. In two heat exchange components 3 located on both sides of the same battery cell 2, the sliding part 383b of one is located in the groove 383a of the other.

[0183] In these optional embodiments, a fourth side plate 383 is provided on one side of the main body 31. The fourth side plate 383 is provided with a sliding groove 383a and a sliding part 383b, so that two adjacent heat exchange components 3 can be connected to each other through the sliding groove 383a and the sliding part 383b, thereby improving the connection strength between the two adjacent heat exchange components 3 and increasing the assembly speed of the two adjacent heat exchange components 3.

[0184] Optionally, the third side plate 382 and the fourth side plate 383 are respectively disposed on both sides of the second side plate 381. For example, the third side plate 382 is located on the side of the second side plate 381 facing the second bottom support plate 36, and the fourth side plate 383 is located on the side of the second side plate 381 away from the second bottom support plate 36.

[0185] Secondly, embodiments of this application provide an energy storage device, including the battery device 20 described in the first aspect embodiment. The energy storage device includes a cabinet, and at least one side of the cabinet has a door. The energy storage device includes energy storage containers, energy storage cabinets, etc.

[0186] Thirdly, embodiments of this application provide an electrical device, including the battery device 20 described in the first aspect embodiment above.

[0187] Please refer to Figures 2 to 14. This application embodiment provides a battery device 20, including: a battery cell 2, and a heat exchange component 3 located on at least one side of the battery cell 2 in a first direction X. The heat exchange component 3 includes a main body 31 and a plurality of ribs 32 disposed on the main body 31 facing at least one side of the battery cell 2. A heat exchange duct 33 is formed between adjacent ribs 32 at intervals, and an air outlet 332 and an air inlet 331 are respectively located at both ends of the heat exchange duct 33. The air outlet 332 is located on at least one side of the heat exchange component 3 in a second direction Y, and the air inlet 331 is located on at least one side of the heat exchange component 3 in a third direction Z. The first direction X, the second direction Y, and the third direction Z intersect each other. The plurality of ribs 32 enclose and form two or more heat exchange ducts 33. The air inlet 331 of at least one heat exchange duct 33 faces the heat exchange component 3 on the side facing the third direction Z, and the air inlet 331 of at least one heat exchange duct 33 faces the heat exchange component 3 on the other side facing the third direction Z. Multiple ribs 32 enclose multiple heat exchange ducts 33, and the outlets 332 of the multiple heat exchange ducts 33 face the same side of the heat exchange component 3 in the second direction Y. At least one rib 32 encloses a medium cavity 34 and a first opening 341 and a second opening 342 communicating with the medium cavity 34. The medium cavity 34 is used to contain the heat exchange medium, and one of the first opening 341 and the second opening 342 is used for the inflow of the heat exchange medium, and the other is used for the outflow of the heat exchange medium. The ribs 32 are provided on one side of the main body 31, and a limiting groove 35 is provided on the other side of the main body 31. Heat exchange components 3 are provided on both sides of the battery cell 2 in the first direction X. A portion of the battery cell 2 is located in the limiting groove 35 of one of the heat exchange components 3, and the battery cell 2 abuts against the rib 32 of the other heat exchange component 3.

[0188] 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: Battery cell; A heat exchange component is located on at least one side of the battery cell in a first direction. The heat exchange component includes a main body, a plurality of ribs disposed on the main body facing at least one side of the battery cell, and a heat exchange air duct is formed between adjacent two ribs at intervals, and an air outlet and an air inlet are respectively located at both ends of the heat exchange air duct. The air outlet is located on at least one side of the heat exchange component in the second direction, and the air inlet is located on at least one side of the heat exchange component in the third direction. The first direction, the second direction, and the third direction intersect each other.

2. The battery device according to claim 1, wherein, The plurality of the ribs are enclosed to form two or more heat exchange ducts, at least one of the heat exchange ducts having an air inlet facing the heat exchange component on one side of the third direction, and at least one of the heat exchange ducts having an air inlet facing the heat exchange component on the other side of the third direction.

3. The battery device according to claim 2, wherein, The rib includes a first rib, which comprises a first segment and a second segment connected to each other. The first segment extends along the third direction, and the second segment extends along the second direction. The first segments of two adjacent first ribs enclose each other to form an air inlet, and the second segments of two adjacent first ribs enclose each other to form an air outlet. Wherein, the two first ribs used to form the same air inlet are the same group of first ribs, and the first segments of at least two groups of first ribs extend in opposite directions, so that the air inlets of at least two heat exchange ducts face the heat exchange components on both sides in the third direction.

4. The battery device according to claim 3, wherein, The plurality of ribs further includes a second rib, the second rib comprising a third segment extending along the third direction and a fourth segment extending along the second direction, the third segment being located on the side of the first segment of the plurality of first ribs facing away from the air outlet, and the second segments of the plurality of first ribs being disposed on both sides of the fourth segment. The heat exchange duct is formed by two adjacent first ribs and / or two adjacent first ribs and second ribs, and the air inlets of the heat exchange ducts located on both sides of the fourth segment are arranged opposite to each other.

5. The battery device according to claim 4, wherein, The fourth segment includes a first sub-segment and two second sub-segments connected to the first sub-segment on the side facing the second segment. The two second sub-segments are inclined from the first sub-segment in opposite directions and are both connected to the third segment.

6. The battery device according to claim 1, wherein, The multiple ribs enclose and form multiple heat exchange air ducts, and the air outlets of the multiple heat exchange air ducts face the same side of the heat exchange component in the second direction.

7. The battery device according to claim 1, wherein, At least one of the ribs encloses a medium cavity and a first opening and a second opening communicating with the medium cavity. The medium cavity is used to contain a heat exchange medium, and one of the first opening and the second opening is used for the inflow of the heat exchange medium and the other is used for the outflow of the heat exchange medium.

8. The battery device according to claim 1, wherein, The rib is provided on one side of the main body, and a limiting groove is provided on the other side of the main body. The battery cell has heat exchange components on both sides in the first direction. A portion of the battery cell is located in the limiting groove of one of the heat exchange components, and the battery cell abuts against the ribs of the other heat exchange component.

9. The battery device according to claim 8, wherein, The main body is connected to a first bottom plate and a first limiting plate on the side away from the rib. The first bottom plate, the first limiting plate and the main body form the limiting groove. The first bottom plate and the first limiting plate are located on both sides of the battery cell in the second direction.

10. The battery device according to claim 9, wherein, The first limiting plate includes an inner surface facing the limiting groove. The inner surface includes a guide surface located on the side of the inner surface away from the main body and in a direction away from the main body. The guide surface is inclined in a direction away from the first base plate.

11. The battery device according to claim 9, wherein, The first base plate is provided with an elastic fin on the side facing the limiting groove. One end of the elastic fin is connected to the first base plate, and the other end extends in a direction away from the first base plate. The angle between the extension path of the elastic fin and the surface of the first base plate facing the limiting groove is an acute angle.

12. The battery device according to claim 11, wherein, The two elastic fins are spaced apart along the third direction, and the two elastic fins are inclined from the first base plate in opposite directions.

13. The battery device according to claim 11, wherein, The first base plate is recessed in the surface of the limiting groove to form a groove, one end of the elastic fin is connected to the groove, and the other end extends out of the groove.

14. The battery device according to claim 11, wherein, The elastic fin includes a first side surface extending away from the first base plate, a first end surface located away from the first base plate, and a first oblique surface connecting the first side surface and the first end surface. The first oblique surface is located on the side of the elastic fin away from the main body, and the angle between the extension path of the first oblique surface and the extension paths of the first side surface and the first end surface is an obtuse angle.

15. The battery device according to claim 9, wherein, The main body is connected to the first side plates on both sides in the third direction, and the first side plates, the first bottom support plate and the first limiting plate form the limiting groove.

16. The battery device according to claim 9, wherein, A second bottom support plate is provided on the side of the main body facing the rib, and the second bottom support plate is located on the side of the battery cell in the second direction. In this embodiment, one of the second base plate and the first base plate is provided with a guide rail extending along the first direction, and the other is provided with a guide groove adapted to the guide rail. In the two heat exchange components located on both sides of the same battery cell, the guide rail of one of them is located in the guide groove of the other.

17. The battery device according to claim 16, wherein, The first base plate has multiple protrusions on the side opposite to the limiting groove, and the guide groove is formed between two adjacent protrusions; The guide rail is provided on the side of the second base plate facing the battery cell.

18. The battery device according to claim 17, wherein, The second base plate has a recessed groove on the side facing the battery cell, and the guide rail is located in the groove. In the two heat exchange components located on both sides of the same battery cell, the plurality of protrusions of one component are located in the groove of the other component.

19. The battery device according to claim 18, wherein, The extension dimension of the guide rail in the second direction is greater than the depth of the guide groove, so that the facing surfaces of the first base plate and the second base plate are spaced apart.

20. The battery device according to claim 17, wherein, The second base plate includes a limiting part and a mating part that are sequentially distributed in a direction away from the main body. The mating part is connected to the limiting part through a stepped surface. The mating part is located on the side of the limiting part away from the battery cell. The first base plate and the stepped surface are spaced apart, and the surfaces of the first base plate and the mating part facing the battery cell are coplanar.

21. The battery device according to claim 7, wherein, The main body has an abutting portion on at least one side in the first direction, and the abutting portion abuts against the battery cell.

22. The battery device according to claim 21, wherein, The angle between the extension path of the contact portion and the surface of the main body portion is an acute angle or a right angle.

23. The battery device according to claim 1, wherein, The heat exchange component further includes a second side plate connected to at least one side of the main body in the third direction. The second side plate and the rib are located on the same side of the main body, and the second side plate is spaced apart from the battery cell to form an air inlet space between the second side plate and the battery cell. The air inlet and the air inlet space are in communication.

24. The battery device according to claim 1 further includes a housing, wherein the battery cell and the heat exchange component are disposed in the housing, a third side plate is provided on one side of the main body, a groove extending along the first direction is provided on one of the third side plate and the inner wall of the housing, and a rail body cooperating with the groove body is provided on the other side, and the heat exchange component is movably connected to the housing along the first direction through the groove body and the rail body.

25. The battery device according to claim 1, wherein, A fourth side plate is provided on one side of the main body. A groove is provided on the surface of the fourth side plate away from the battery cell. A sliding part is provided on one side of the fourth side plate in the first direction. In the two heat exchange components located on both sides of the same battery cell, the sliding part of one of them is located in the groove of the other.

26. An energy storage device comprising a battery device as described in any one of claims 1-25.

27. An electrical device comprising the battery device according to any one of claims 1-25.

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