Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device, the battery device comprises a box body, a battery monomer and a heat exchange device, and the battery monomer is arranged in the box body; the heat exchange device is arranged in the box body and comprises a first plate body and a second plate body which are arranged in a stacked mode, the surface, facing the first plate body, of the second plate body is concaved inwards to form a concave part, a main body structure of the first plate body covers the concave part to form a heat exchange flow channel used for introducing a heat exchange medium, and the extending structure is arranged on the periphery of the main body structure in a surrounding mode. The battery monomers are connected to the surfaces of the first plate bodies away from the heat exchange runners; a reinforcing structure is arranged at the connecting position of the first plate body and the box body. Due to the fact that the reinforcing structure is arranged at the connecting position of the first plate body and the box body, the connecting position of the first plate body and the box body has good structural strength, when the battery device is affected by vibration, impact and the like, the first plate body and the box body can still be firmly connected, heat exchange devices can operate well, and the service life of the heat exchange devices is prolonged. And the reliability of the battery device is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery device and a power utilization device. BACKGROUND

[0002] The battery device has the advantages of high specific energy and high power density, and is widely used in electronic devices and vehicles, such as mobile phones, notebook computers, electric vehicles, electric cars, electric planes, electric ships and electric tools.

[0003] With the continuous expansion of the application range of the battery device, people's requirements for the reliability of the battery device are also getting higher and higher. How to improve the reliability of the battery device is more and more concerned by the technical personnel in the field. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which has good reliability.

[0005] In the first aspect, some embodiments of the present application provide a battery device, which comprises a box body, a battery monomer and a heat exchange device, the battery monomer is arranged in the box body; the heat exchange device is arranged in the box body, the heat exchange device comprises a first plate body and a second plate body arranged in layers, the surface of the second plate body facing the first plate body is recessed inwardly of the second plate body to form a recess, the first plate body covers the recess to form a heat exchange flow channel for passing in a heat exchange medium, the battery monomer is connected to the surface of the first plate body away from the heat exchange flow channel; the first plate body is connected to the box body, and a reinforcing structure is arranged at the connection position of the first plate body and the box body; the first plate body comprises a main body structure and a protruding structure, the protruding structure is arranged around the outer periphery of the main body structure and is connected to the main body structure, the main body structure covers the recess, and in a plane perpendicular to the thickness direction of the first plate body, the orthographic projection of the protruding structure extends out of the orthographic projection of the second plate body.

[0006] In the above structure, the surface of the second plate body facing the first plate body is recessed inwardly of the second plate body to form a recess, the first plate body covers the recess to form a heat exchange channel for the heat exchange medium to pass through, and the battery monomer is connected to the surface of the first plate body away from the heat exchange channel and can exchange heat with the heat exchange device. Since the reinforcing structure is arranged at the connecting position of the first plate body and the box, the connecting position of the first plate body and the box has good structural strength, and when the battery device is affected by vibration, impact and the like, the first plate body and the box can still be firmly connected, the heat exchange device can operate well, and the reliability of the battery device is improved. By making the projection of the protruding structure on the plane perpendicular to the thickness direction of the first plate body protrude from the projection of the second plate body on the plane perpendicular to the thickness direction of the first plate body, the area of the first plate body is larger than the area of the second plate body, the edges of the second plate body and the edges of the first plate body are not flush, and when the second plate body and the first plate body are bonded, fused or welded, the bonding material, the fusing material or the welding material can seep out from the outer peripheral edge of the second plate body and adhere to the first plate body, the gap between the first plate body and the second plate body can be further connected or sealed, and the connection strength of the first plate body and the second plate body and the sealing property therebetween are improved.

[0007] According to the battery device provided by some embodiments of the present application, the main body structure and the protruding structure are integrally formed, which not only facilitates the processing and manufacturing of the first plate body, but also makes the overall structure of the first plate body have good strength.

[0008] According to the battery device provided by some embodiments of the present application, the protruding structure is connected to the box, and the reinforcing structure is arranged on the protruding structure, so that the reinforcing structure can reinforce the structure of the protruding structure connected to the box, and the structural strength of the connecting position of the first plate body and the box is improved.

[0009] According to the battery device provided by some embodiments of the present application, the reinforcing structure is arranged on the protruding structure, and the protruding structure is connected to the box through the reinforcing structure. The protruding structure is connected to the box through the reinforcing structure, so that the reinforcing structure can reinforce the connection of the first plate body and the box, and the connection firmness of the heat exchange device on the box is improved.

[0010] According to the battery device provided by some embodiments of the present application, the reinforcing structure is connected to the surface of the protruding structure facing the second plate body, and the reinforcing structure is connected to the second plate body. By connecting the reinforcing structure to the second plate body, not only can the reinforcing structure block the gap between the first plate body and the second plate body and reduce the possibility of leakage of the heat exchange channel, but also the reinforcing structure can assist in fixing the second plate body, and the firmness of the connection of the second plate body and the first plate body is improved.

[0011] According to some embodiments of the present application, the battery device has a reinforcing structure that surrounds the main structure, so that the entire circumference where the first plate is connected to the housing can be reinforced by the reinforcing structure, which is beneficial to further improve the firmness of the connection between the first plate and the housing.

[0012] According to some embodiments of the battery device provided in this application, the reinforcing structure includes multiple reinforcing substructures, which are spaced apart circumferentially along the main structure. By arranging the multiple reinforcing substructures spaced apart circumferentially along the main structure, not only can the material used in the reinforcing structure be reduced, but the multiple reinforcing substructures can also more uniformly enhance the structural strength of the outer peripheral edge of the first plate.

[0013] According to some embodiments of the battery device provided in this application, the reinforcing structure includes two reinforcing substructures, which are arranged opposite to each other and located on both sides of the second plate. By arranging the two reinforcing substructures at a distance from each other and respectively located on both sides of the second plate, the two reinforcing substructures can be positioned at two opposite edges of the first plate, thereby structurally reinforcing the first plate from opposite sides. This not only reduces the amount of material used in the reinforcing structure but also enhances the structural strength of the first plate more symmetrically.

[0014] According to some embodiments of the battery device provided in this application, both the first plate and the second plate are configured with plastic structures. This allows the heat exchange device to not only better withstand the corrosion of the heat exchange medium, thus extending its service life, but also to have a lower weight, contributing to the lightweight design of the battery device and reducing its cost. Configuring both the first and second plates with plastic structures also provides the heat exchange device with good elasticity, making it less prone to breakage under impact and reducing the risk of leakage.

[0015] According to some embodiments of the battery device provided in this application, the base material of the first plate is metal, and the second plate is configured as a plastic structure. By using metal as the base material of the first plate, the first plate has good thermal conductivity, enabling the battery cells to exchange heat with the heat exchange medium more efficiently through the first plate. By configuring the second plate as a plastic structure, the second plate not only reduces the weight and cost of the heat exchange device, but also has good elasticity, making it less prone to breakage upon impact.

[0016] According to some embodiments of the present application, the battery device further includes an adhesive structure, through which individual battery cells are bonded to the surface of the first plate away from the heat exchange channel. The bonding structure allows the individual battery cells to adhere well to the surface of the first plate, enabling heat exchange between the individual battery cells and the heat exchange device.

[0017] According to some embodiments of the battery device provided in this application, the bonding structure is configured as a thermally conductive structure. By configuring the bonding structure as a thermally conductive structure, the heat exchange efficiency between the battery cell and the heat exchange device is higher, which is beneficial to improving the temperature stability of the battery cell and the reliability of battery cell operation.

[0018] According to some embodiments of the present application, the battery device further includes a water nozzle connected to the first plate and communicating with the heat exchange channel.

[0019] According to some embodiments of this application, the battery device further includes a battery management module. The housing forms a first cavity and a second cavity. A portion of the heat exchange devices are located in the first cavity, and another portion of the heat exchange devices are located in the second cavity. The battery cells are located in the first cavity, and the water tap and the battery management module are located in the second cavity.

[0020] Secondly, some embodiments of this application provide an electrical device that includes a battery device provided by any of the above-described technical solutions, the battery device being used to provide electrical energy.

[0021] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0022] Some embodiments of this application provide a battery device, which includes a housing, battery cells, and a heat exchange device. The battery cells are disposed in the housing. The heat exchange device is disposed in the housing and includes a first plate and a second plate stacked together. The surface of the second plate facing the first plate is recessed into the interior of the second plate to form a recess. The first plate covers the recess to form a heat exchange channel for introducing a heat exchange medium. The battery cells are connected to the surface of the first plate away from the heat exchange channel. The first plate is connected to the housing, and a reinforcing structure is provided at the connection position between the first plate and the housing. The first plate includes a main structure and a protruding structure. The protruding structure is disposed around the outer periphery of the main structure and connected to the main structure. The main structure covers the recess. On a plane perpendicular to the thickness direction of the first plate, the orthographic projection of the protruding structure extends beyond the orthographic projection of the second plate. In the above structure, the surface of the second plate facing the first plate is recessed into the second plate to form a recess. The first plate covers the recess to form a heat exchange channel for the introduction of the heat exchange medium. The battery cell is connected to the surface of the first plate away from the heat exchange channel, enabling heat exchange with the heat exchange device. Because a reinforcing structure is provided at the connection point between the first plate and the housing, the connection point has good structural strength. Even when the battery device is subjected to vibration, impact, or other influences, the first plate and the housing can still be firmly connected, ensuring good thermal performance of the heat exchange device and improving the reliability of the battery device. By making the orthographic projection of the protruding structure on a plane perpendicular to the thickness direction of the first plate extend beyond the orthographic projection of the second plate on a plane perpendicular to the thickness direction of the first plate, the area of ​​the first plate is larger than the area of ​​the second plate, and the edges of the second plate and the first plate are not flush. This allows the adhesive, fusion, or welding materials to seep outward from the outer periphery of the second plate and adhere to the first plate when the second plate and the first plate are bonded, fused, or welded. This further connects or seals the gap between the first and second plates, which helps to improve the connection strength and sealing performance between the first and second plates. Attached Figure Description

[0023] 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:

[0024] Figure 1 These are schematic diagrams of the vehicle structure provided in some embodiments of this application;

[0025] Figure 2 This is a schematic diagram showing the disassembled structure of a battery device provided in some embodiments of this application;

[0026] Figure 3 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0027] Figure 4 An exploded view of a portion of the internal structure of a battery device provided in some embodiments of this application;

[0028] Figure 5 This is a partial internal structure diagram of a battery device provided in some embodiments of this application;

[0029] Figure 6 This is a split schematic diagram of the heat exchange components of a battery device provided in some embodiments of this application;

[0030] Figure 7 This is a schematic diagram of the internal structure of the heat exchange device of the battery device provided in some embodiments of this application;

[0031] Figure 8 This is a schematic diagram of the structure of the second plate of the heat exchange device of the battery device provided in some embodiments of this application;

[0032] Figure 9 for Figure 5 Enlarged view of point G in the middle;

[0033] Figure 10 for Figure 7 Enlarged view at point F;

[0034] Figure 11 This is a top view of the first plate of the heat exchange device of the battery device provided in some embodiments of this application;

[0035] Figure 12 This is a top view of the first plate of the heat exchange device of the battery device provided in some other embodiments of this application;

[0036] Figure 13 This is a top view of the first plate of the heat exchange device of the battery device provided in some embodiments of this application.

[0037] In the picture;

[0038] 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor; 5. Housing; 5a. First housing section; 5b. Second housing section; 5c. Receiving space; 5c1. First cavity; 5c2. Second cavity; 7. Battery cell; 8. Heat exchange device; 80. Heat exchange channel; 81. First plate; 811. Main structure; 812. Extended structure; 82. Second plate; 820. Recess; 83. Reinforcing structure; 831. Reinforcing substructure; 9. Adhesive structure; 10. Water nozzle. Detailed Implementation

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 used in individual battery cells such as energy storage containers or energy storage cabinets. As the application fields of battery devices continue to expand, the requirements for the reliability of battery devices are also constantly increasing.

[0046] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0047] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0048] A battery cell can be a rechargeable battery cell, which refers to a battery cell that can be recharged after being discharged to activate the active materials and continue to be used.

[0049] Battery cells can be lithium-ion cells, sodium-ion cells, sodium-lithium-ion cells, lithium metal cells, sodium metal cells, lithium-sulfur cells, magnesium-ion cells, nickel-metal hydride cells, nickel-cadmium cells, lead-acid cells, etc.

[0050] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0051] In some embodiments, the battery device may include one or more battery packs, which may include one or more individual battery cells. As an example, a battery pack includes a housing and one or more individual battery cells, which are housed within the housing, for example, by a fixed arrangement. As yet another example, the battery device may include multiple battery packs, which may be connected in series, parallel, or in a mixed configuration.

[0052] As an example, the enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0053] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the enclosure to house the individual battery cells.

[0054] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0055] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0056] As the application scope of battery devices continues to expand in various fields, people are paying more and more attention to the reliability of battery devices. How to improve the reliability of battery devices has become an important research direction for those skilled in the art.

[0057] As devices that provide electrical energy in electrical appliances, batteries have the characteristics of high specific energy and high power density, which makes their reliability a major concern.

[0058] During charging and discharging, individual battery cells generate heat, causing their temperature to rise. To ensure the reliability of these cells, heat exchange devices are needed to control their temperature through heat exchange. Currently, the common approach is to install heat exchange devices within the battery pack's enclosure for heat exchange with the individual cells. In some cases, to maintain stability within the enclosure, the heat exchange devices are often fixedly connected. However, when the battery pack is subjected to vibration or impact, these loads directly act on the connection point between the heat exchange device and the enclosure. This connection can easily lead to breakage of the heat exchange medium, causing leakage and jeopardizing the reliability of the battery pack.

[0059] To improve the reliability of the battery device, some embodiments of this application provide a battery device including a housing, battery cells, and a heat exchange device. The battery cells are disposed in the housing. The heat exchange device is disposed in the housing and includes a first plate and a second plate stacked together. The surface of the second plate facing the first plate is recessed into the interior of the second plate to form a recess. The first plate covers the recess to form a heat exchange channel for introducing a heat exchange medium. The battery cells are connected to the surface of the first plate away from the heat exchange channel. The first plate is connected to the housing, and a reinforcing structure is provided at the connection position between the first plate and the housing. The first plate includes a main structure and a protruding structure. The protruding structure is disposed around the outer periphery of the main structure and connected to the main structure. The main structure covers the recess. On a plane perpendicular to the thickness direction of the first plate, the orthographic projection of the protruding structure extends beyond the orthographic projection of the second plate. In the above structure, the surface of the second plate facing the first plate is recessed into the second plate to form a recess. The first plate covers the recess to form a heat exchange channel for the introduction of the heat exchange medium. The battery cell is connected to the surface of the first plate away from the heat exchange channel, enabling heat exchange with the heat exchange device. Because a reinforcing structure is provided at the connection point between the first plate and the housing, the connection point has good structural strength. Even when the battery device is subjected to vibration, impact, or other influences, the first plate and the housing can still be firmly connected, ensuring good thermal performance of the heat exchange device and improving the reliability of the battery device. By making the orthographic projection of the protruding structure on a plane perpendicular to the thickness direction of the first plate extend beyond the orthographic projection of the second plate on a plane perpendicular to the thickness direction of the first plate, the area of ​​the first plate is larger than the area of ​​the second plate, and the edges of the second plate and the first plate are not flush. This allows the adhesive, fusion, or welding materials to seep outward from the outer periphery of the second plate and adhere to the first plate when the second plate and the first plate are bonded, fused, or welded. This further connects or seals the gap between the first and second plates, which helps to improve the connection strength and sealing performance between the first and second plates.

[0060] The battery device described in the embodiments of this application is applicable to electrical devices that use battery devices.

[0061] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, among others. 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.

[0062] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0063] Figure 1 A schematic diagram of a vehicle provided for some embodiments of this application.

[0064] like Figure 1 As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0065] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0066] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0067] Figure 2 This is a schematic diagram showing the disassembled structure of a battery device provided in some embodiments of this application. For example... Figure 2 As shown, the battery device 2 includes a housing 5 and battery cells 7, with the battery cells 7 housed within the housing 5. The battery cell 7 can be the smallest unit that makes up a battery.

[0068] The housing 5 is used to house the battery cell 7, and the housing 5 can have various structures. In some embodiments, the housing 5 may include a first housing portion 5a and a second housing portion 5b, which overlap each other, and together define a housing space 5c for housing the battery cell 7. The second housing portion 5b may be a hollow structure with one end open, and the first housing portion 5a may be a plate-like structure, with the first housing portion 5a covering the open side of the second housing portion 5b to form a housing 5 with the housing space 5c; alternatively, both the first housing portion 5a and the second housing portion 5b may be hollow structures with one side open, with the open side of the first housing portion 5a covering the open side of the second housing portion 5b to form a housing 5 with the housing space 5c. Of course, the first housing portion 5a and the second housing portion 5b can be various shapes, such as cylinders, cuboids, etc.

[0069] To improve the sealing performance after the first housing part 5a and the second housing part 5b are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 5a and the second housing part 5b.

[0070] Assuming that the first box section 5a covers the top of the second box section 5b, the first box section 5a can also be called the upper box cover, and the second box section 5b can also be called the lower box.

[0071] In the battery device 2, there can be one or more battery cells 7. If there are multiple battery cells 7, they can be connected in series, in parallel, or in a mixed manner. A mixed connection means that multiple battery cells 7 are connected in both series and parallel. Multiple battery cells 7 can be directly connected in series, in parallel, or in a mixed manner, and then the whole assembly of multiple battery cells 7 is housed in the housing 5. Alternatively, multiple battery cells 7 can first be connected in series, in parallel, or in a mixed manner to form a battery module, and then multiple battery modules can be connected in series, in parallel, or in a mixed manner to form a whole assembly, which is then housed in the housing 5.

[0072] Some embodiments of this application provide a battery device 2, see reference. Figures 3 to 5 The battery device 2 includes a housing 5, individual battery cells 7, and a heat exchange device 8. The individual battery cells 7 are disposed within the housing 5; the heat exchange device 8 is disposed within the housing 5. (Refer to...) Figure 6 and Figure 7 The heat exchange device 8 includes a first plate 81 and a second plate 82 stacked together. The surface of the second plate 82 facing the first plate 81 is recessed into the interior of the second plate 82 to form a recess 820. The first plate 81 covers the recess 820 to form a heat exchange channel 80 for the introduction of heat exchange medium. The battery cell 7 is connected to the surface of the first plate 81 away from the heat exchange channel 80. The first plate 81 is connected to the housing 5, and a reinforcing structure 83 is provided at the connection position between the first plate 81 and the housing 5.

[0073] Battery cell 7 can be a rechargeable battery cell, which refers to a battery cell 7 that can be recharged after discharge to activate the active materials and continue to be used. Battery cell 7 can be a lithium-ion battery cell, sodium-ion battery cell, sodium-lithium-ion battery cell, lithium metal battery cell, sodium metal battery cell, lithium-sulfur battery cell, magnesium-ion battery cell, nickel-metal hydride battery cell, nickel-cadmium battery cell, lead-acid battery cell, etc.

[0074] For example, the battery cell 7 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0075] When the battery device 2 includes multiple battery cells 7, the multiple battery cells 7 can be arranged and fixed to form a battery module.

[0076] The housing 5 can be a component that provides a receiving space 5c, which is used to accommodate components such as battery cells 7, wiring harnesses, and circuit boards located inside the battery device 2, so that the housing 5 can provide protection for the battery cells 7, wiring harnesses, circuit boards, and other devices. The housing 5 can be the first housing part 5a in the aforementioned scheme, or it can be the second housing part 5b in the aforementioned scheme.

[0077] The heat exchange device 8 can be a device for exchanging heat with the battery cell 7. It is set in the housing space 5c of the housing 5 and can exchange heat with the battery cell 7 in the housing 5 to keep the battery cell 7 in a suitable temperature range, which is beneficial to keep the battery cell 7 in a suitable working state.

[0078] The first plate 81 and the second plate 82 can be two plate structures used to form the heat exchange device 8. They are arranged sequentially along the thickness direction of the heat exchange device 8 and connected to each other to form the heat exchange channel 80 in the heat exchange device 8.

[0079] The surface of the second plate 82 facing the first plate 81 is recessed into the interior of the second plate 82 to form a recess 820. The recess 820 is used to form a heat exchange channel 80 located in the heat exchange device 8. The first plate 81 covers the recess 820, which means that the first plate 81 seals the opening of the recess 820, so that the first plate 81 and the second plate 82 can enclose the recess 820 to form a heat exchange channel 80 for the passage of the heat exchange medium.

[0080] For example, the recess 820 can be formed by removing material from the surface of the second plate 82 facing the first plate 81, as shown in the reference. Figure 8Alternatively, the second plate 82 can be stamped using a stamping process, and a recess can be formed on the surface of the second plate 82 facing the first plate 81.

[0081] The heat exchange channel 80 can be a channel through which the heat exchange medium can circulate. By setting the heat exchange channel 80 in the heat exchange device 8, the heat exchange medium can circulate into the heat exchange device 8 through the heat exchange channel 80, so that the heat exchange device 8 can maintain a temperature difference with the devices (such as battery cells 7) in the housing 5, and the heat exchange device 8 can continuously and efficiently exchange heat with the devices (such as battery cells 7) in the housing 5.

[0082] For example, a portion of the heat exchange device 8 may be provided with a heat exchange channel 80, so that the heat exchange medium circulating in the heat exchange channel 80 can exchange heat with the battery cells 7 in the housing 5; or the entire heat exchange device 8 may be provided with a heat exchange channel 80, so that the heat exchange medium circulating in the heat exchange channel 80 can exchange heat with the battery cells 7 in the housing 5.

[0083] The battery cell 7 is connected to the surface of the first plate 81 away from the heat exchange channel 80. This can mean that the casing of the battery cell 7 is connected to the surface of the first plate 81 away from the heat exchange channel 80, so that the casing of the battery cell 7 can fit tightly against the surface of the first plate 81 away from the heat exchange channel 80, allowing for smooth heat exchange between the heat exchange device 8 and the battery casing. For example, the casing of the battery cell 7 can be bonded to the first plate 81, allowing the battery cell 7 and the heat exchange device 8 to have a larger contact area, which is beneficial for improving the heat exchange efficiency between them.

[0084] The first plate 81 is connected to the housing 5, which means that the first plate 81 is connected to the inner wall of the housing space 5c of the housing 5, so that the first plate 81 is fixed in the housing space 5c of the housing 5, and is not easy to shake, which helps to reduce the possibility of damage to the heat exchange device 8.

[0085] For example, the first plate 81 can be connected to the box 5 by means of bonding, welding or other methods, or it can be connected to the box 5 by means of connecting bolts, rivets or other connectors.

[0086] The reinforcing structure 83 can refer to a structure used to improve structural strength. The reinforcing structure 83 is provided at the connection point between the first plate 81 and the housing 5. This means that the reinforcing structure 83 is placed at the connection point of the first plate 81 and the housing 5, so that the reinforcing structure 83 can enhance the structural strength of the connection point. This makes it less likely for the connection point of the first plate 81 and the housing 5 to crack or be damaged when the battery device 2 is subjected to vibration, impact, or other forces, which helps reduce the possibility of damage to the heat exchange device 8 and improves the reliability of the battery device 2.

[0087] For example, the reinforcing structure 83 can increase structural strength by adding material. The reinforcing structure 83 can be made of the same material as the first plate 81, or it can be made of a material with higher strength than the first plate 81.

[0088] In the above structure, the surface of the second plate 82 facing the first plate 81 is recessed inward to form a recess 820. The first plate 81 covers the recess 820 to form a heat exchange channel 80 for the introduction of the heat exchange medium. The battery cell 7 is connected to the surface of the first plate 81 away from the heat exchange channel 80, and can exchange heat with the heat exchange device 8. Since a reinforcing structure 83 is provided at the connection position between the first plate 81 and the housing 5, the connection position between the first plate 81 and the housing 5 has good structural strength. When the battery device 2 is affected by vibration, impact, etc., the first plate 81 and the housing 5 can still be firmly connected, and the heat exchange device 8 can operate well, which helps to improve the reliability of the battery device 2.

[0089] In some embodiments, the first plate 81 includes a main structure 811 and a protruding structure 812. The protruding structure 812 is disposed around the outer periphery of the main structure 811 and connected to the main structure 811. The main structure 811 covers the recess 820. On a plane perpendicular to the thickness direction of the first plate 81, the orthographic projection of the protruding structure 812 extends beyond the orthographic projection of the second plate 82.

[0090] The main structure 811 and the protruding structure 812 can be two interconnected parts of the first plate 81. The main structure 811 is the main part of the first plate 81, and the protruding structure 812 is a structure that extends radially from the main structure 811. The protruding structure 812 is arranged around the outer periphery of the main structure 811; specifically, the protruding structure 812 can be arranged to surround the entire periphery of the main structure 811.

[0091] The main structure 811 covers the recess 820, which means that the main structure 811 seals the opening of the recess 820, so that the main structure 811 and the second plate 82 can form a heat exchange channel 80 for the passage of heat exchange medium.

[0092] By making the orthographic projection of the protruding structure 812 on a plane perpendicular to the thickness direction of the first plate 81 extend beyond the orthographic projection of the second plate 82 on a plane perpendicular to the thickness direction of the first plate 81, the area of ​​the first plate 81 is larger than the area of ​​the second plate 82, and the edges of the second plate 82 and the first plate 81 are not flush. This allows the adhesive, fusion, or welding materials to seep outward from the outer periphery of the second plate 82 and adhere to the first plate 81 when the second plate 82 and the first plate 81 are bonded, fused, or welded. This further connects or seals the gap between the first plate 81 and the second plate 82, which helps to improve the connection strength and sealing performance between the first plate 81 and the second plate 82.

[0093] In some embodiments, the main structure 811 and the protruding structure 812 are integrally formed.

[0094] The main structure 811 and the protruding structure 812 are integrally formed, meaning that the main structure 811 and the protruding structure 812 can be manufactured using an integral forming process. The main structure 811 and the protruding structure 812 can be manufactured using integral forming methods such as casting and stamping, allowing the first plate 81 to be manufactured as a whole simultaneously. This not only facilitates the manufacturing of the first plate 81 but also gives the overall structure of the first plate 81 good strength. Alternatively, the main structure 811 and the protruding structure 812 can be manufactured using machining methods such as milling, by processing a single piece of blank, resulting in lower processing difficulty and cost for the first plate 81.

[0095] In some embodiments, the protruding structure 812 is connected to the housing 5, and the reinforcing structure 83 is disposed on the protruding structure 812.

[0096] The protruding structure 812 is connected to the housing 5. Specifically, the protruding structure 812 can be connected to the beam of the housing 5, so that the heat exchange device 8 can be firmly connected to the housing 5. Specifically, the protruding structure 812 can be connected to the beam of the housing 5 by means of bonding, welding, etc., or it can be connected to the beam of the housing 5 by means of connecting bolts, rivets, etc.

[0097] By connecting the protruding structure 812 to the housing 5, the housing 5 is connected to the outer periphery of the first plate 81, so that the housing 5 can support the heat exchange device 8 from the entire outer periphery of the first plate 81, which helps to improve the uniformity of the force on the heat exchange device 8.

[0098] By setting the reinforcing structure 83 on the protruding structure 812, the reinforcing structure 83 can structurally strengthen the protruding structure 812 connected to the box body 5, which is beneficial to improving the structural strength at the connection position between the first plate 81 and the box body 5.

[0099] For example, the reinforcing structure 83 may be disposed on the surface of the protruding structure 812 facing the second plate 82, or the reinforcing structure 83 may be disposed on the surface of the protruding structure 812 away from the second plate 82.

[0100] In some embodiments, the reinforcing structure 83 can be a reinforcing rib, a block structure, or a sheet structure. Those skilled in the art can select the structural form of the reinforcing structure 83 according to the actual situation to increase the material at the protruding structure 812, so as to improve the connection strength between the protruding structure 812 and the box 5.

[0101] In some embodiments, the reinforcing structure 83 can be connected to the protruding structure 812 by means of bonding, welding or other methods, or it can be connected to the protruding structure 812 by means of connecting bolts, rivets or other connecting parts. Those skilled in the art can choose the connection method between the reinforcing structure 83 and the protruding structure 812 according to the actual situation.

[0102] In some embodiments, reference Figure 9 The reinforcing structure 83 is disposed on the protruding structure 812, and the protruding structure 812 is connected to the housing 5 through the reinforcing structure 83. The connection between the protruding structure 812 and the housing 5 through the reinforcing structure 83 enables the reinforcing structure 83 to strengthen the connection between the first plate 81 and the housing 5, which is beneficial to improving the connection firmness of the heat exchange device 8 on the housing 5.

[0103] For example, the reinforcing structure 83 can be connected to the housing 5 by welding or bonding.

[0104] In some embodiments, reference Figure 10 The reinforcing structure 83 is connected to the surface of the protruding structure 812 facing the second plate 82, and the reinforcing structure 83 is connected to the second plate 82.

[0105] The reinforcing structure 83 is connected to the surface of the protruding structure 812 facing the second plate 82, so that the reinforcing structure 83 protrudes relative to the surface of the main structure 811 facing the second plate 82. The reinforcing structure 83 does not easily affect the flatness of the surface of the first plate 81 facing away from the second plate 82, so that the surface of the first plate 81 facing away from the second plate 82 can fit well with the battery cell 7.

[0106] The connection between the reinforcing structure 83 and the second plate 82 can refer to the reinforcing structure 83 protruding from the surface of the main structure 811 toward the second plate 82 and being connected to the outer periphery of the second plate 82. By connecting the reinforcing structure 83 to the second plate 82, the reinforcing structure 83 can not only seal the gap between the first plate 81 and the second plate 82, reducing the possibility of leakage in the heat exchange channel 80, but also provide auxiliary fixation for the second plate 82, thereby improving the robustness of the connection between the second plate 82 and the first plate 81.

[0107] In some embodiments, reference Figure 11 The reinforcing structure 83 surrounds the main structure 811.

[0108] The reinforcing structure 83 surrounds the main structure 811. This can mean that the reinforcing structure 83 extends along the circumference of the main structure 811 and surrounds it for a full circumference. This allows the reinforcing structure 83 to provide structural reinforcement to the entire circle of the protruding structure 812. As a result, the entire circle of the connection between the first plate 81 and the box 5 can be reinforced by the reinforcing structure 83, which is beneficial to further improve the firmness of the connection between the first plate 81 and the box 5.

[0109] In some embodiments, reference Figure 12 The reinforcing structure 83 includes multiple reinforcing substructures 831, which are spaced apart circumferentially along the main structure 811.

[0110] The reinforcing structure 83 includes multiple reinforcing substructures 831, meaning that the reinforcing structure 83 is composed of multiple reinforcing substructures 831, which are spaced apart. The multiple reinforcing substructures 831 are spaced apart circumferentially along the main structure 811, meaning that the multiple reinforcing substructures 831 are spaced apart along the extension direction of the protruding structure 812, surrounding the outer periphery of the main structure 811. By arranging the multiple reinforcing substructures 831 circumferentially along the main structure 811, not only can the material used in the reinforcing structure 83 be reduced, but the multiple reinforcing substructures 831 can also more uniformly enhance the structural strength of the outer periphery of the first plate 81.

[0111] For example, multiple reinforcing substructures 831 are arranged at equal intervals along the circumference of the main structure 811.

[0112] In some embodiments, reference Figure 13 The reinforcing structure 83 includes two reinforcing substructures 831, which are arranged opposite to each other and located on both sides of the second plate 82.

[0113] The reinforcing structure 83 includes two reinforcing substructures 831, meaning that the reinforcing structure 83 is composed of two reinforcing substructures 831. By arranging the two reinforcing substructures 831 at a relative interval and respectively on both sides of the second plate 82, the two reinforcing substructures 831 can be positioned at two opposite edges of the first plate 81. This allows the reinforcing substructures 831 to structurally reinforce the first plate 81 from opposite sides, which not only reduces the material used in the reinforcing structure 83 but also enhances the structural strength of the first plate 81 more symmetrically.

[0114] In some embodiments, the two reinforcing substructures 831 can be disposed on the two longer edges of the protruding structure 812, so that the reinforcing substructures 831 can strengthen the structure of a larger area, which is beneficial to the reinforcing structure 83 achieving a better structural strengthening effect.

[0115] In some embodiments, the first plate 81 is configured as a plastic structure and the second plate 82 is configured as a plastic structure.

[0116] By configuring both the first plate 81 and the second plate 82 as plastic structures, the heat exchange device 8 can not only better withstand the corrosion of the heat exchange medium, thus extending its service life, but also has a lower weight, which is beneficial for the lightweight design of the battery device 2 and helps to reduce its cost. Configuring both the first plate 81 and the second plate 82 as plastic structures also gives the heat exchange device 8 good elasticity, making it less prone to breakage under impact and reducing the risk of leakage.

[0117] The first plate 81 and the second plate 82 can be composite materials with polypropylene or polyamide as the matrix and glass fiber added for modification, such that the first plate 81 and the second plate 82 are made of thermoplastic vulcanized rubber, thermoplastic elastomer, or thermoplastic polyurethane. For example, the density range of the first plate 81 and the second plate 82 can be 0.96~1.0 g / cm³. 3 The elastic modulus can range from 190 MPa to 760 MPa, the Poisson's ratio can range from 0.4 to 0.5, the tensile breaking strength can reach more than 21 MPa, and the elongation at break can range from 90% to 600%.

[0118] In some embodiments, the base material of the first plate 81 is metal, and the second plate 82 is configured as a plastic structure.

[0119] The base material of the first plate 81 can refer to the material with the largest mass proportion in the first plate 81. By using metal as the base material of the first plate 81, the first plate 81 has good thermal conductivity, allowing the battery cell 7 to exchange heat with the heat exchange medium more efficiently through the first plate 81. By configuring the second plate 82 as a plastic structure, the second plate 82 not only reduces the weight and cost of the heat exchange device 8, but also has good elasticity, making it less prone to breakage under impact. For example, the first plate 81 can be supported by a ternary aluminum alloy or a hexagonal aluminum alloy, which helps to improve the structural strength of the first plate 81.

[0120] By making the base material of the first plate 81 metal and configuring the second plate 82 as a plastic structure, not only does the plate of the heat exchange device 8 facing the battery cell 7 have good heat exchange efficiency, which helps to improve the heat exchange efficiency between the heat exchange device 8 and the battery cell 7, but it also enables the plate of the heat exchange device 8 facing away from the battery cell 7 to play a role in heat preservation of the heat exchange medium, which helps to reduce the waste of heat in the heat exchange medium, and at the same time, it can also reduce the possibility of the plate of the heat exchange device 8 facing away from the battery cell 7 being damaged by stone impact.

[0121] For example, the plastic used for the second plate 82 can be a composite material with polypropylene or polyamide as the matrix and glass fiber added for modification, such that the second plate 82 is made of thermoplastic vulcanized rubber, thermoplastic elastomer, or thermoplastic polyurethane. For example, the density range of the second plate 82 can be 0.96~1.0 g / cm³. 3 The elastic modulus can range from 190 MPa to 760 MPa, the Poisson's ratio can range from 0.4 to 0.5, the tensile breaking strength can reach more than 21 MPa, and the elongation at break can range from 90% to 600%.

[0122] In some embodiments, the first plate 81 and the second plate 82 are connected by a hot pressing process, which helps to improve the strength of the connection between the first plate 81 and the second plate 82.

[0123] In some embodiments, the battery device 2 further includes an adhesive structure 9, through which the battery cell 7 is bonded to the surface of the first plate 81 away from the heat exchange channel 80.

[0124] The adhesive structure 9 can be used to bond the battery cell 7 to the first plate 81. The battery cell 7 is bonded to the surface of the first plate 81 away from the heat exchange channel 80 through the adhesive structure 9, so that the battery cell 7 can fit well with the surface of the first plate 81, and the battery cell 7 can exchange heat with the heat exchange device 8.

[0125] For example, the adhesive structure 9 may be a structure formed by curing an adhesive substance coated on the surface of the first plate 81 away from the heat exchange channel 80, which can firmly connect the battery cell 7 to the first plate 81.

[0126] In some embodiments, the adhesive structure 9 is configured as a thermally conductive structure.

[0127] The adhesive structure 9 is configured as a thermally conductive structure, meaning that the adhesive structure 9 has thermal conductivity and can be a thermally conductive structural adhesive. By configuring the adhesive structure 9 as a thermally conductive structure, the heat exchange efficiency between the battery cell 7 and the heat exchange device 8 is higher, which is beneficial to improving the temperature stability of the battery cell 7 and the reliability of its operation.

[0128] For example, the adhesive structure 9 can be a structure formed by curing epoxy thermally conductive structural adhesive, silicone thermally conductive structural adhesive, or polyurethane thermally conductive structural adhesive.

[0129] In some embodiments, the heat exchange device 8 further includes a water nozzle 10, which is connected to the first plate 81 and communicates with the heat exchange channel 80.

[0130] The water nozzle 10 can be a device for introducing heat exchange medium into the heat exchange channel 80 or discharging heat exchange medium from the heat exchange channel 80. It is connected to the heat exchange pipeline so that the heat exchange pipeline can introduce heat exchange medium into the heat exchange channel 80.

[0131] By connecting the water nozzle 10 to the heat exchange channel 80, the heat exchange medium can smoothly flow into or out of the heat exchange channel 80 through the water nozzle 10. By connecting the water nozzle 10 to the first plate 81, the water nozzle 10 can be fixed on the heat exchange device 8 and installed with the heat exchange device 8, which helps to improve the convenience of installation.

[0132] In some embodiments, the battery device 2 further includes a battery management module. The housing 5 forms a first cavity 5c1 and a second cavity 5c2. A portion of the heat exchange devices 8 are located in the first cavity 5c1, and another portion of the heat exchange devices 8 are located in the second cavity 5c2. The battery cell 7 is located in the first cavity 5c1, and the water tap 10 and the battery management module are located in the second cavity 5c2.

[0133] The first cavity 5c1 and the second cavity 5c2 can be two cavities within the receiving space 5c formed by the housing 5. The first cavity 5c1 is used to house the individual battery cells 7, and the second cavity 5c2 is used to house the piping of the battery management module and the heat exchange device 8. The battery management module can be used to monitor battery status, ensure battery safety, and optimize battery performance; it may include a microcontroller unit (e.g., a main control chip), a digital signal processor, a CAN bus transceiver, relays, a high-voltage box, and other devices.

[0134] By placing a portion of the heat exchange devices 8 in the first cavity 5c1 and another portion in the second cavity 5c2, the heat exchange devices 8 can exchange heat with both the battery cell 7 and the battery management module, which helps to improve the reliability of the battery device 2.

[0135] For example, the battery device 2 also includes a bottom cover plate connected to the housing 5 and located on the side of the heat exchange device 8 away from the battery cell 7.

[0136] Some embodiments of this application also provide an electrical device, which includes a battery device 2 provided by any of the above technical solutions, the battery device 2 being used to provide electrical energy.

[0137] Some embodiments of this application provide a battery device 2, which includes a housing 5, a battery cell 7, and a heat exchange device 8. The battery cell 7 is disposed in the housing 5. The heat exchange device 8 is disposed in the housing 5 and includes a first plate 81 and a second plate 82 stacked together. The surface of the second plate 82 facing the first plate 81 is recessed inward to form a recess 820. The first plate 81 includes a main structure 811 and a protruding structure 812. The protruding structure 812 is disposed around the outer periphery of the main structure 811 and connected to the main structure 811. The main structure 811 covers the recess 820. On a plane perpendicular to the thickness direction of the first plate 81, the orthographic projection of the protruding structure 812 extends beyond the orthographic projection of the second plate 82. A reinforcing structure 83 surrounds the main structure 811. The base material of the first plate 81 is metal, and the second plate 82 is configured as a plastic structure.

[0138] In the above structure, the surface of the second plate 82 facing the first plate 81 is recessed inward to form a recess 820. The first plate 81 covers the recess 820 to form a heat exchange channel 80 for the introduction of the heat exchange medium. The battery cell 7 is connected to the surface of the first plate 81 away from the heat exchange channel 80, and can exchange heat with the heat exchange device 8. Since a reinforcing structure 83 is provided at the connection position between the first plate 81 and the housing 5, the connection position between the first plate 81 and the housing 5 has good structural strength. When the battery device 2 is affected by vibration, impact, etc., the first plate 81 and the housing 5 can still be firmly connected, and the heat exchange device 8 can operate well, which helps to improve the reliability of the battery device 2.

[0139] 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, characterized in that, include: Box; The battery cell is housed within the casing; A heat exchange device is disposed in the housing. The heat exchange device includes a first plate and a second plate stacked together. The surface of the second plate facing the first plate is recessed into the interior of the second plate to form a recess. The first plate covers the recess to form a heat exchange channel for introducing a heat exchange medium. The battery cell is connected to the surface of the first plate away from the heat exchange channel. The first plate is connected to the housing. A reinforcing structure is provided at the connection position between the first plate and the housing. The first plate includes a main structure and a protruding structure. The protruding structure is disposed around the outer periphery of the main structure and connected to the main structure. The main structure covers the recess. On a plane perpendicular to the thickness direction of the first plate, the orthographic projection of the protruding structure extends beyond the orthographic projection of the second plate.

2. The battery device according to claim 1, characterized in that, The main structure and the extended structure are integrally formed.

3. The battery device according to claim 1, characterized in that, The reinforcing structure is disposed on the protruding structure, and the protruding structure is connected to the housing through the reinforcing structure.

4. The battery device according to claim 1, characterized in that, The protruding structure is connected to the housing, and the reinforcing structure is disposed on the protruding structure.

5. The battery device according to claim 4, characterized in that, The reinforcing structure is connected to the surface of the protruding structure facing the second plate, and the reinforcing structure is connected to the second plate.

6. The battery device according to claim 4, characterized in that, The reinforcing structure surrounds the main structure.

7. The battery device according to claim 4, characterized in that, The reinforcing structure includes multiple reinforcing substructures, which are spaced apart circumferentially along the main structure.

8. The battery device according to claim 4, characterized in that, The reinforcing structure includes two reinforcing substructures, which are arranged opposite each other and located on both sides of the second plate.

9. The battery device according to claim 1, characterized in that, The first plate is configured as a plastic structure, and the second plate is configured as a plastic structure.

10. The battery device according to claim 1, characterized in that, The first plate has a metal substrate and the second plate has a plastic structure.

11. The battery device according to claim 1, characterized in that, The battery device further includes an adhesive structure, through which the battery cells are bonded to the surface of the first plate away from the heat exchange channel.

12. The battery device according to claim 11, characterized in that, The adhesive structure is configured as a thermally conductive structure.

13. The battery device according to claim 1, characterized in that, The heat exchange device also includes a water nozzle, which is connected to the first plate and communicates with the heat exchange channel.

14. The battery device according to claim 13, characterized in that, The battery device further includes a battery management module. The housing forms a first cavity and a second cavity. A portion of the heat exchange devices are located in the first cavity, and another portion of the heat exchange devices are located in the second cavity. The battery cells are located in the first cavity, and the water tap and the battery management module are located in the second cavity.

15. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-14, the battery device being used to provide electrical energy.

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