Battery device, electric device and energy storage device

Abstract

The application provides a battery device, an electric device and an energy storage device, and belongs to the battery field. The battery device comprises a box body and a high-voltage box arranged in the box body; the high-voltage box comprises a box body, a heat dissipation assembly and components and elements arranged in the box body; the heat dissipation assembly comprises a heat dissipation element and a driver; a first flow channel is formed in the heat dissipation element; the first flow channel is connected with the driver to form a circulating flow path for containing a heat exchange medium; the circulating flow path is located in the box body and is an independent flow path; the driver is configured to drive the heat exchange medium to flow along the circulating flow path to exchange heat with at least part of the components and elements; and part of the circulating flow path is not located at a position where the heat dissipation element and the components and elements contact and exchange heat. In the technical solution, the heat dissipation element can absorb the heat of the components and elements in the high-voltage box through the heat exchange medium to dissipate heat for the components and elements, so that the risk of damage of the components and elements due to overheating can be reduced, and the working reliability of the high-voltage box can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device, electrical equipment, and energy storage device. Background Technology

[0002] Energy conservation and emission reduction are crucial for sustainable social development. Batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, and are an important component in promoting energy transition and sustainable development. For the new energy industry, battery technology is a critical factor in its development.

[0003] The battery contains a high-voltage box, which is the core power distribution unit for electrical equipment, energy storage systems, etc., responsible for distributing the high-voltage electricity from the battery pack to various electrical components (e.g., motors, air conditioners). The reliability of the high-voltage box directly affects the safety and performance of electrical equipment, energy storage systems, etc. Summary of the Invention

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one object of this application is to provide a battery device, electrical appliance, and energy storage device that can improve the operational reliability of the high-voltage box.

[0005] An embodiment of the first aspect of this application provides a battery device, including: a housing and a high-voltage box disposed within the housing; the high-voltage box includes the housing, a heat dissipation assembly, and components disposed within the housing, the heat dissipation assembly includes a heat sink and a driver, a first flow channel is formed within the heat sink, the first flow channel is connected to the driver to form a circulating flow path for containing a heat exchange medium, the circulating flow path is located within the housing and is configured as an independent flow path, the driver is configured to drive the heat exchange medium to circulate along the circulating flow path to exchange heat with at least a portion of the components, and a portion of the circulating flow path is not located at the position where the heat sink and the components contact for heat exchange.

[0006] In the technical solution of this application embodiment, the heat sink can absorb the heat of the components in the high voltage box through the heat exchange medium to dissipate heat from the components. This can reduce the risk of damage to the components due to overheating and improve the working reliability of the high voltage box.

[0007] This embodiment also sets the circulating flow path as an independent flow path, which can prevent the heat exchange medium in other flow paths from flowing into the circulating flow path after heat exchange due to the circulating flow path being connected to other flow paths. This minimizes thermal interference from other components to the heat exchange medium in the circulating flow path, thus helping to ensure the heat dissipation effect of the heat dissipation component. Moreover, the heat dissipation component can operate independently, allowing for independent temperature regulation of the components in the high-voltage box, enabling timely and precise heat dissipation of the components.

[0008] Furthermore, the circulating flow path is not located at the point where the heat sink contacts the components for heat exchange. By circulating the heat exchange medium along the circulating flow path, heat can be dissipated from the components. There is no need to use an external liquid source to provide the heat exchange medium to the heat sink, thus eliminating the need for pipes and other structures connecting the battery device to an external liquid source.

[0009] In some embodiments, the heat dissipation assembly further includes a receiving chamber for containing a heat exchange medium, the receiving chamber being spaced apart from all components, and the receiving chamber, the first flow channel, and the driver being connected to form a circulation path.

[0010] In some embodiments, the volume of the heat exchange medium in the containment chamber is smaller than the volume of the containment chamber, the outlet of the containment chamber is connected to the input end of the driver, the inlet of the containment chamber is connected to the outlet end of the first flow channel, and the output end of the driver is connected to the inlet end of the first flow channel.

[0011] In some embodiments, the receiving chamber and the heat sink are formed independently.

[0012] In some embodiments, the heat sink includes a first part and a second part, the first part being in contact with at least a portion of the components for heat exchange, and the second part being in contact with the components for heat exchange; the first flow channel includes a first sub-flow channel and a second sub-flow channel arranged in series, the first sub-flow channel being formed in the first part, and the second sub-flow channel being formed in the second part.

[0013] In some embodiments, the second part has a cavity that serves as a receiving chamber, and the receiving chamber, the first flow channel, and the driver are connected to form a circulating flow path.

[0014] In some embodiments, the battery device further includes a battery cell disposed within the housing, and the components include a busbar, a portion of which is located outside the housing and electrically connected to the battery cell. The busbar and the first portion are sequentially overlapped and contact each other for heat exchange along a first direction, the first direction being parallel to the thickness direction of the busbar.

[0015] In some embodiments, the box body includes a lid and a surrounding panel. The surrounding panel includes a first wall and a second wall disposed opposite to each other along a second direction. A first portion is disposed opposite to the lid along the first direction and spaced apart. The first portion, the lid, and the surrounding panel enclose a mounting cavity for accommodating components. The first wall and the second wall are respectively located on both sides of the components along the second direction and disposed opposite to each other. The first direction is perpendicular to the second direction. The second portion is located on the side of the first wall away from the second wall.

[0016] In some embodiments, the components include a first circuit board and a second circuit board, and the high-voltage box further includes a temperature acquisition element for acquiring the temperature of the components; in response to the temperature of the components reaching a preset temperature, the first circuit board controls the driver to drive the heat exchange medium to flow; the second circuit board is used to acquire information of the battery cells and generate electrical signals, and the first circuit board is able to receive electrical signals.

[0017] In some embodiments, along the second direction, the first circuit board is located between the first wall and the second wall, and the first circuit board is opposite to the first wall and forms a gap between the first wall and the first wall.

[0018] In some embodiments, the larger surface of the second portion is attached to the first wall.

[0019] In some embodiments, the components include a busbar and a relay arranged sequentially and connected along a first direction, the first direction being parallel to the thickness direction of the busbar, and a first portion extending along the first direction.

[0020] In some embodiments, the first part and the second part are fixedly connected.

[0021] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0022] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device described above, the battery device being used to store electrical energy.

[0023] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0025] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0026] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0027] Figure 3 This is an exploded structural diagram of the high-voltage box in some embodiments of this application;

[0028] Figure 4 This is a three-dimensional structural diagram of the high-voltage box according to some embodiments of this application;

[0029] Figure 5 for Figure 4 The diagram shows a front view of the high-voltage box.

[0030] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the high-voltage box along the AA direction;

[0031] Figure 7 for Figure 3 The diagram shows the structure of the heat sink.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1000 vehicles;

[0034] Battery unit 100, controller 200, motor 300;

[0035] Battery cell module 10, battery cell 11;

[0036] Box 20, first box 21, second box 22;

[0037] High-voltage box 30, box body 31, box cover 311, first wall 312, second wall 313, heat dissipation assembly 32, heat dissipation component 321, channel 3211, first part 3212, second part 3213, large surface 3213a, cavity 3214, driver 322, component 33, busbar 331, first circuit board 332, second circuit board 333, relay 334, liquid injection port 34. Detailed Implementation

[0038] 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.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0040] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0041] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0042] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0043] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0044] 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," and "circumferential" 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.

[0045] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "linking", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; or internal connections between two components or the interaction between two components.

[0046] In this application, the term "parallel" includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0047] Unless otherwise specified, the terms "comprising" and "including" as used in this application can be open-ended or closed-ended. For example, "comprising" and "including" can mean that other components not listed may also be included, or that only the listed components may be included.

[0048] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0049] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0050] High-voltage boxes are crucial components of electrical equipment and energy storage systems. They not only control battery charging and discharging and provide overvoltage and overcurrent protection, thus playing a role in power transmission, but also continuously detect insulation faults, open circuit faults, grounding faults, and high-voltage faults throughout the entire high-voltage system. To meet the increasingly complex demands of high-voltage power distribution and management, the components integrated within high-voltage boxes, as power distribution hubs, are becoming increasingly densely packed. During actual use, these components generate heat, leading to overheating. Overheated components are prone to damage, thus affecting the reliability of the high-voltage box.

[0051] To solve this technical problem, one approach is to incorporate a first channel into the high-voltage box, connecting it to a heat exchange channel of a cold plate used for temperature regulation of individual battery cells. This allows coolant to flow into the first channel to dissipate heat from the components. However, in this solution, the coolant flowing from the heat exchange channel to the first channel absorbs some of the heat generated by the individual battery cells, affecting the heat dissipation effect on the components.

[0052] Based on the above considerations, this application designs a battery device comprising a high-voltage box including a heat dissipation assembly. The heat dissipation assembly includes a heat sink and a driver. A first flow channel within the heat sink is connected to the driver to form a circulating flow path. The heat exchange medium circulates along the circulating flow path to exchange heat with at least a portion of the components. The circulating flow path is an independent flow path, and a portion of the circulating flow path is not located at the point of heat exchange between the heat sink and the components. This heat dissipation assembly cools the components, reducing the risk of component damage due to overheating and improving the operational reliability of the high-voltage box.

[0053] In such a battery device, since the circulation path is an independent path, the heat absorbed by the heat exchange medium of other components in the other heat exchange channels has less thermal interference to the heat exchange medium in the circulation path. This results in less heat absorption by the heat exchange medium in the circulation path from other components, which helps to ensure the heat dissipation effect of the heat dissipation components.

[0054] The battery device provided in this application can be used, but is not limited to, in electrical equipment or energy storage devices such as vehicles, ships, or aircraft. A power system incorporating the battery device provided in this application can be used to form such an electrical equipment or energy storage device.

[0055] The energy storage device utilizing a battery as a power system in this application embodiment can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electrical energy as needed and output it at appropriate times. For example, the energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage device provided in this application embodiment can be used in any power system that requires energy storage.

[0056] In some embodiments, the energy storage device is an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0057] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet. Each battery cluster may include multiple battery units connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, these clusters are connected in parallel to increase the capacity of the energy storage device.

[0058] In this application, the electrical devices using battery devices as power sources can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. For the sake of brevity, the following embodiments all use electric vehicles as examples.

[0059] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0060] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0061] Figure 2 A schematic diagram of the structure of a battery device 100 according to an embodiment of this application is shown. Figure 2 As shown, the battery device 100 provided in the embodiments of this application may include one or more battery cell assemblies 10 for providing voltage and capacity. The battery cell assembly 10 may include multiple battery cells 11, which are connected in series, parallel, or mixed connection via busbars.

[0062] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0063] As an example, the battery cell assembly 10 can be a battery module, which is formed by arranging and fixing multiple battery cells 11 together to form an independent module. As an example, the battery module can be formed by bundling multiple battery cells 11 together with cable ties.

[0064] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a housing 20 and one or more individual battery cells 10, with the individual battery cells 10 housed within the housing 20. The housing 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of combinations of simple cuboids, cylinders, or spheres. The material of the housing 20 can be an alloy such as aluminum alloy or iron alloy, a polymer such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0065] As an example, the battery cell assembly 10 can be a battery module, and the battery cell assembly 10 can be housed in the housing 20 by fixing the battery module in the housing 20.

[0066] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0067] As an example, the housing 20 may include a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 are fastened together to form a closed space inside the housing 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, and can be either non-sealed or sealed to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 11. The first housing 21 may be a top cover or a bottom plate.

[0068] As an example, the housing 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 20 forms an enclosed space to house the battery cell assembly 10.

[0069] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0070] The battery cell 11 mentioned in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0071] The battery cell 11 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. As an example, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, or a battery cell 11 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, etc., and this application has no particular limitation.

[0072] The battery device 100 provided in this embodiment also includes a high-voltage box, which is disposed inside the housing 20. Please refer to... Figures 3 to 6 The high-pressure box 30 includes a box body 31, a heat dissipation assembly 32, and components 33 disposed within the box body 31. The heat dissipation assembly 32 includes a heat sink 321 and a driver 322. A first flow channel is formed within the heat sink 321. The first flow channel is connected to the driver 322 to form a circulating flow path for containing the heat exchange medium. The circulating flow path is located within the box body 20 and is configured as an independent flow path. The driver 322 is configured to drive the heat exchange medium to flow along the circulating flow path to exchange heat with at least a portion of the components 33. The portion of the circulating flow path is not located at the position where the heat sink 321 contacts the components 33 for heat exchange.

[0073] The high-voltage box 30 (also known as a distribution box) is an electrical device used to connect battery cells to electrical components and distribute power. The high-voltage box 30 is housed within an enclosure, which provides protection for the high-voltage box 30 and reduces the risk of damage. In some embodiments, the internal space of the enclosure can be divided into a battery compartment and an electrical compartment, with the battery cells housed in the battery compartment and the high-voltage box 30 housed in the electrical compartment.

[0074] The housing 31 is used to house and protect the various components 33 in the high-voltage box 30. The housing 31 can be rectangular, cubic, or other shapes. The material of the housing 31 can be alloy materials such as aluminum alloy or iron alloy, polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0075] The components 33 may include, but are not limited to, high-voltage components such as relays 334 (e.g., main positive relays, main negative relays, and pre-charge relays), fuses, and resistors, and these high-voltage components can be connected via high-voltage conductive parts or high-voltage wiring harnesses. In some embodiments, the high-voltage box 30 may also include low-voltage components disposed within the box body 31. These low-voltage components are used to transmit signals and may include, but are not limited to, sampling terminals. Of course, the types of components 33 are not limited to these and can be adjusted according to actual usage requirements, which will not be elaborated here.

[0076] The first flow channel is used for the flow of the heat exchange medium, which can be in gaseous or liquid form. For example, the heat exchange medium may include at least one of water, ethanol, glycerol, etc. There can be one, two, three or more first flow channels, and this embodiment does not specifically limit this.

[0077] In this document, "heat exchange between heat sink 321 and component 33" can be understood as direct contact and heat exchange between component 33 and heat sink 321, or indirect contact and heat exchange between component 33 and heat sink 321 via a heat-conducting component. A circulating flow path is a flow path structure that forms a closed loop. Specifically, the heat exchange medium flows out from the first flow channel, enters the driver, and then flows back to the first flow channel. Since part of the circulating flow path is not located at the point of contact and heat exchange between the heat sink and the component, the heat exchange medium in this part of the circulating flow path does not directly exchange heat with the component. "The circulating flow path is configured as an independent flow path" means that the circulating flow path is unrelated to and does not interfere with the other flow paths, and the heat exchange medium in the circulating flow path is completely independent. For example, the battery device may also include a heat exchange component (such as a cold plate) with a second flow channel for the flow of the heat exchange medium. The heat exchange component exchanges heat with the battery cell assembly, and the first and second flow channels are not interconnected. In other words, the heat sink and the heat exchange component can operate independently.

[0078] The actuator 322 provides power for the circulating flow of the heat exchange medium in the circulation path. The actuator 322 can be appropriately selected according to the type of heat exchange medium. For example, if the heat exchange medium is in liquid form, the actuator 322 can be implemented as a water pump, which can be any of a piezoelectric pump, electromagnetic pump, etc. For example, if the heat exchange medium is in gas form, the actuator 322 can be implemented as a vacuum pump. The input end of the actuator 322 is connected to the outlet end of the first flow path, and the output end of the actuator 322 is connected to the inlet end of the first flow path.

[0079] In this embodiment, the heat dissipation mechanism of the high-voltage box 30 is as follows: When the battery cell is charging and discharging, the components 33 inside the high-voltage box 30 work and generate heat. The heat exchange medium in the part of the circulation path where the heat sink 321 contacts the components 33 absorbs the heat from the components 33. At this time, the temperature of the heat exchange medium in the part of the circulation path where the heat sink 321 does not contact the components 33 is still relatively low. Then, the heat exchange medium is driven by the driver 322 to circulate along the circulation path, so that the lower-temperature heat exchange medium flows to the part where the heat sink 321 contacts the components 33 to absorb the heat from the components 33. The heat exchange medium that has absorbed the heat from the components 33 flows to the part of the circulation path where the heat sink 321 does not contact the components 33 (i.e., carries away the heat from the components 33), so that the components 33 can achieve heat dissipation and cooling.

[0080] In this embodiment, the battery device features a circulating flow path. The heat exchange medium within this path absorbs heat from the components 33 within the high-voltage box 30, thus dissipating heat from the components 33. This reduces the risk of damage to the components 33 due to overheating and improves the operational reliability of the high-voltage box 30. Furthermore, the circulating flow path is independent, preventing heat exchange medium from flowing into the circulating flow path after heat exchange due to communication with other flow paths (such as the second flow path). This minimizes thermal interference from components other than the components 33 to the heat exchange medium within the circulating flow path, ensuring the effective heat dissipation of the heat dissipation component 32. Moreover, the heat dissipation component 32 can operate independently, allowing for independent temperature regulation of the components 33 within the high-voltage box 30, enabling timely and precise heat dissipation.

[0081] Furthermore, in the technical solution of this embodiment, the circulation path is closed. Since part of the circulation path is not located at the position where the heat sink and the component are in contact for heat exchange, the heat exchange medium can be circulated along the circulation path to dissipate heat from the component 33. There is no need to use an external liquid source to provide heat exchange medium to the heat dissipation component, thus eliminating the need for pipes and other structures connecting the battery device 100 to the external liquid source.

[0082] According to some embodiments of this application, the heat dissipation assembly 32 may further include a receiving chamber for containing the heat exchange medium, the receiving chamber being spaced apart from all components 33, and the receiving chamber, the first flow channel and the driver being connected to form a circulation path.

[0083] In other words, the receiving chamber is formed as part of the circulation path. As described above, the circulation path is located inside the housing, therefore the receiving chamber is also located inside the housing. It should be noted that the receiving chamber is a sealed chamber to prevent the liquid heat exchange medium from flowing out of the receiving chamber and affecting the battery cells. As an example, the receiving chamber and the heat sink 321 can be simultaneously located inside or outside the housing 31. The receiving chamber and the heat sink 321 can be arranged adjacent to each other or separated from each other. In the embodiment where the receiving chamber can be located outside the housing 31, the receiving chamber and the housing 31 can be arranged adjacent to each other or separated from each other. The receiving chamber can be molded separately, or it can be integrally molded with the heat sink 321 or the housing 31. In the embodiment where the receiving chamber is molded separately, the shape of the receiving chamber can be cuboid, cube, etc. The material of the receiving chamber can be alloy materials such as aluminum alloy or iron alloy, polymer materials such as polycarbonate or polyisocyanurate foam, or composite materials such as glass fiber and epoxy resin.

[0084] The phrase "the receiving chamber is spaced apart from all components 33" indicates that there is a gap between the receiving chamber and all components 33, and that there is no heat exchange contact between the receiving chamber and any of the components 33. As an example, the receiving chamber can be connected to the outflow end of the first flow channel, the input end of the driver 322 can be connected to the receiving chamber, and the output end of the driver 322 can be connected to the inflow end of the first flow channel. Thus, the flow path of the heat exchange medium in the circulating flow path is: first flow channel - receiving chamber - driver 322 - first flow channel. As an example, the receiving chamber can also be connected in parallel with the second sub-flow channel (see below), and the receiving chamber can be connected in series with the first sub-flow channel (see below). An on / off valve controls the flow of the heat exchange medium from the receiving chamber or the second sub-flow channel to the first sub-flow channel.

[0085] In this embodiment, a circulating flow path is formed by connecting the receiving chamber, the first flow channel, and the driver 322, thus extending the path of the circulating flow path. Furthermore, the receiving chamber is spaced apart from all components 33, meaning the receiving chamber can also be a portion of the circulating flow path not located at the contact point between the heat sink 321 and the components 33. This lengthening of the portion of the circulating flow path not located at the contact point between the heat sink 321 and the components 33 increases the amount of heat exchange medium available for heat exchange with the components 33, thereby enhancing the heat dissipation effect on the components 33.

[0086] According to some embodiments of this application, the volume of the heat exchange medium in the receiving chamber can be configured to be smaller than the volume of the receiving chamber. That is, the heat exchange medium does not completely fill the receiving chamber. Furthermore, the outlet of the receiving chamber is connected to the input end of the driver 322, the inlet of the receiving chamber is connected to the outlet end of the first flow channel, and the output end of the driver 322 is connected to the inlet end of the first flow channel. In this embodiment, the flow path of the heat exchange medium in the circulating flow path is: first flow channel - receiving chamber - driver 322 - first flow channel.

[0087] It is understandable that the heat exchange medium will expand after absorbing heat. Since the containment chamber is a closed chamber and not full, the expanded heat exchange medium can still be contained in the containment chamber.

[0088] In this embodiment, the containment chamber is not completely filled with the heat exchange medium, so that the containment chamber can accommodate the expansion of the heat exchange medium. The containment chamber acts as a buffer, thereby stabilizing the pressure of the heat exchange medium.

[0089] According to some embodiments of this application, the receiving chamber and the heat sink 321 can be formed independently. That is, the heat sink 321 and the receiving chamber are processed separately. In this embodiment, the receiving chamber and the heat sink 321 can be arranged adjacent to each other or spaced apart from each other. In the technical solution where the receiving chamber and the heat sink 321 are arranged adjacent to each other, the receiving chamber and the heat sink 321 can also be fixedly connected by welding, screwing, bonding, snap-fitting, or other methods.

[0090] By adopting this technical solution, the receiving chamber and the heat sink 321 are molded independently, and the position and shape of the receiving chamber can be flexibly set as needed, so as to facilitate more flexible arrangement of the pipeline between the receiving chamber and the driver 322.

[0091] According to some embodiments of this application, please refer to Figures 3 to 7 The heat sink 321 can be configured to include a first portion 3212 and a second portion 3213. The first portion 3212 contacts at least some of the components 33 for heat exchange, while the second portion 3213 does not contact any of the components 33 for heat exchange. The first flow channel includes a first sub-flow channel and a second sub-flow channel connected in series. The first sub-flow channel is formed in the first portion 3212, and the second sub-flow channel is formed in the second portion 3213. The output terminal of the driver 322 can be connected to the inlet terminal of the second sub-flow channel, the outlet terminal of the second sub-flow channel can be connected to the inlet terminal of the first sub-flow channel, and the outlet terminal of the first sub-flow channel can be connected to the input terminal of the driver 322.

[0092] The first part 3212 and the second part 3213 can adopt various structures. In some embodiments, both the first part 3212 and the second part 3213 may include multiple tubes that are bent and connected in sequence, wherein the tubes can be circular tubes, flat tubes, and the tubes can be U-shaped, S-shaped, L-shaped, etc. In some embodiments, please refer to Figure 6 and Figure 7 Both the first part 3212 and the second part 3213 can be constructed as plate structures, and both the first part 3212 and the second part 3213 are provided with channels 3211. As an example, the first part 3212 can have one or more channels 3211, such as two, three, four or five channels 3211, etc., and the second part 3213 can also have one or more channels 3211, such as two, three, four or five channels 3211, etc. In some embodiments, both the first part 3212 and the second part 3213 are provided with multiple channels 3211, the multiple channels 3211 on the first part 3212 are connected in series to form a first sub-channel, the multiple channels 3211 on the second part 3213 are connected in series to form a second sub-channel, and the first sub-channel and the second sub-channel are connected in series to form a first channel.

[0093] The phrase "the first part 3212 contacts at least some of the components 33 for heat exchange" is intended to indicate that the first part 3212 directly contacts at least some of the components 33, or that the first part 3212 indirectly contacts at least some of the components 33 through a heat-conducting element. The phrase "the second part 3213 does not contact any of the components 33 for heat exchange" is intended to indicate that the second part 3213 neither directly nor indirectly contacts any of the components 33.

[0094] An exemplary working principle of the battery device in this embodiment is as follows: When a single battery cell is charged and discharged, the components 33 in the high-voltage box 30 operate and generate heat. At least some of the heat from the components 33 is conducted to the first part 3212, where it is absorbed by the heat exchange medium, thereby dissipating heat from the components 33. Since the second sub-channel is formed in the second part 3213, and the second part 3213 does not contact any of the components 33 for heat exchange, the temperature of the heat exchange medium in the second part 3213 remains relatively low. The heat exchange medium is then driven by the driver 322 to circulate along the circulation path. The heat exchange medium in the second part 3213 flows to the first part 3212, where it absorbs the heat from the components 33, thus dissipating heat from the components 33. The heat exchange medium that has absorbed the heat from the components 33 then flows back to the second part 3213.

[0095] In this embodiment, by setting a portion of the heat sink 321 (i.e., the second portion 3213) to not contact any of the components 33 for heat exchange, the second sub-channel can be a portion of the circulation path that is not located at the point of contact between the heat sink 321 and the components 33 for heat exchange. This ensures that the heat exchange medium can be driven to circulate along the circulation path by the driver 322 to achieve heat dissipation without the need for an external liquid source to provide the heat exchange medium for the circulation path.

[0096] Please refer to some embodiments of this application. Figure 6 The second part 3213 has a cavity 3214, which serves as a receiving chamber. The receiving chamber, the first flow channel, and the actuator are connected to form a circulating flow path. Thus, the receiving chamber is formed within the second part 3213. The outlet end of the first sub-flow channel can be connected to the input end of the actuator 322 through the receiving chamber. In this embodiment, the flow path of the heat exchange medium within the circulating flow path is: first sub-flow channel - receiving chamber - actuator 322 - second sub-flow channel - first sub-flow channel. The receiving chamber and the channel 3211 within the second part 3213 can be integrally formed during the molding of the second part 3213, or they can be formed through machining processes (e.g., bore machining). The cross-section perpendicular to the extension direction of the channel 3211 is the cross-section. The cross-sectional shape of the receiving chamber and the cross-sectional shape of the channel 3211 within the second part 3213 can be the same or different. For example, please refer to... Figure 6 The cross-sectional shape of the accommodating chamber is rectangular, and the cross-sectional shape of the channel 3211 in the second part 3213 is circular.

[0097] In this embodiment, the second part 3213 also has a liquid injection port 34, which communicates with the receiving chamber. The battery device also includes a sealing cap for sealing the liquid injection port 34. It is understood that the liquid injection port 34 can be opened after the battery device is transported to the target location, and then a liquid heat exchange medium can be injected into the liquid injection port 34. The heat exchange medium flows into the first flow channel to fill the first flow channel with heat exchange medium, and then the liquid injection port 34 is sealed. In this way, liquid injection into the first flow channel can be achieved by injecting liquid into the receiving chamber, and leakage of the heat exchange medium in the receiving chamber and the first flow channel during battery device transportation can be avoided, thus preventing impact on the performance of the battery cells.

[0098] In this embodiment, the cavity 3214 within the second part 3213 serves as the receiving chamber, eliminating the need for an additional receiving chamber. This eliminates the installation process of the receiving chamber, improves assembly efficiency, reduces costs, and allows for a more compact structure of the high-voltage box 30, reducing its footprint within the enclosure and improving space utilization. Furthermore, the circulation path is extended, as both the cavity 3214 and the second sub-channel are portions of the circulation path not located at the contact point between the heat sink 321 and the component 33. This results in a larger volume of heat exchange medium within the circulation path that can exchange heat with the component 33, thereby enhancing the heat dissipation effect on the component 33.

[0099] According to some embodiments of this application, the battery device further includes individual battery cells disposed within the housing. Component 33 includes a busbar 331, a portion of which is located outside the housing 31 and electrically connected to the individual battery cells. The busbar 331 and the first portion 3212 can be sequentially overlapped and contact each other for heat exchange along a first direction, which is parallel to the thickness direction of the busbar 331.

[0100] Multiple battery cells are connected in series, parallel, or mixed connections via a busbar 331. The busbar 331 can be made of conductive materials such as copper or aluminum. The busbar 331 is a high-voltage component, connected to the high-voltage circuit of the high-voltage box 30 to achieve power transmission. For example, the busbar 331 can be connected to a main positive relay and a main negative relay. The busbar 331 can directly abut against the first part 3212, or it can indirectly abut against the first part 3212 via foam or the like. In this embodiment, the busbar 331 has a thickness direction; the thickness direction of the busbar 331 can be referred to... Figure 3 In the Z-direction.

[0101] In some embodiments, such as Figure 6 As shown, component 33 may also include a busbar 331 and a relay 334 arranged sequentially and connected along the first direction, with the relay 334 located on the side of the busbar 331 away from the first part.

[0102] Of course, in other embodiments, the first portion 3212 extends along the first direction Z. In this embodiment, the thickness direction of the first portion 3212 is perpendicular to the first direction Z, and the first portion 3212 has two opposing surfaces along its own thickness direction, one of which contacts the busbar 331 and the relay 334 for heat exchange. In this case, the second portion 3213 can be perpendicularly connected to one end of the first portion 3212 along the first direction Z, and extends relative to the first portion 3212 in a direction away from the busbar 331 and the relay 334.

[0103] As described above, the busbar 331, being a high-voltage component, generates more heat than low-voltage components during operation. In other words, the busbar 331 is the primary heat source. It can be understood that in the embodiment where the busbar 331 and the first part 3212 are sequentially overlapped and in contact for heat exchange along the thickness direction of the busbar 331, the first part 3212 is in contact with the large surface of the busbar 331 for heat exchange. This prioritizes heat dissipation from the primary heat source, preventing the heat from diffusing within the housing 31 and affecting other components 33, thereby improving heat dissipation efficiency and ultimately enhancing the operational reliability of the high-voltage housing 30. In this paper, the large surface 3213a of the busbar 331 is defined as the surface with the largest area on the busbar 331.

[0104] The structure of the housing 31 can be varied. In some embodiments, the housing 31 includes a first housing and a second housing, which are fastened together to form a closed space inside the housing 31 to house electrical components and heat dissipation components 32. In other words, the heat dissipation components 32 can be disposed inside the housing 31.

[0105] According to some embodiments of this application, the housing 31 may also be configured to include a lid 311 and a surrounding panel. The surrounding panel includes a first wall 312 and a second wall 313 disposed opposite to each other along a second direction. A first portion 3212 and the lid 311 are disposed opposite to each other and spaced apart along a first direction. The first portion 3212, the lid 311, and the surrounding panel enclose a mounting cavity for accommodating the component 33. The first direction is perpendicular to the second direction. The second portion 3213 is located on the side of the first wall 312 opposite to the second wall 313.

[0106] The cover 311 can be an open structure on one side, or it can be a plate-like structure. The cover 311 and the first portion 3212 are located on both sides of the component 33 along a first direction, providing protection for the component 33 in that direction. The first wall 312 and the second wall 313 are located on both sides of the component 33 along a second direction, providing protection for the component 33 in that direction. For example, the first direction can also refer to the height direction of the high-voltage box 30; specifically, refer to... Figure 3The Z-direction. For the second direction, please refer to [reference needed]. Figure 3 In the X direction ( Figure 6 (left and right directions), or, in some embodiments, the second direction may refer to the Y direction (left and right directions). Figure 6 (Front-back direction). Furthermore, the first part 3212 can be provided with multiple channel groups spaced apart along its own thickness direction (Z direction). Figure 6 Two channel groups are shown, each channel group including a plurality of channels 3211 arranged sequentially at intervals along the thickness direction (X direction) of the second portion 3213. In this way, while providing a large number of channels 3211 in the second portion 3213, the cross-sectional area of ​​the second portion 3213 in the direction perpendicular to the Z direction can be smaller. This is beneficial for making full use of the area of ​​the second portion 3213 facing the busbar 331 (see below) for heat exchange, and also for making the structure of the heat dissipation assembly 32 more compact.

[0107] When the battery device is in the upright position, the cover 311 is located above the component 33, and the first part 3212 is located below the component 33 and acts as the bottom plate of the box, thus the first part 3212 can provide support for the component 33. When the battery device is in the inverted position, the first part 3212 is located above the component 33 and acts as the top plate of the box.

[0108] "The second part 3213 is located on the side of the first wall 312 away from the second wall 313" means that the second part 3213 is separated from the components 33 inside the box 31 by the first wall 312.

[0109] With this technical solution, the first part 3212 serves as the bottom or top plate of the box body 31, enabling it to function as a multi-purpose component. Furthermore, compared to the technical solution where the heat dissipation component 32 is located inside the box body 31, in this embodiment, the first part 3212 is part of the box body 31, and the second part 3213 is located on the side of the first wall 312 facing away from the second wall 313. Therefore, the second part 3213 is located outside the box body 31. This facilitates the transfer of heat from the heat dissipation component to the box body or other components within it, thereby reducing the accumulation of heat from the heat dissipation component 32 within the box body 31 and improving the heat dissipation effect of the heat dissipation component 32 on the components 33.

[0110] According to some embodiments of this application, component 33 includes a first circuit board 332, and high-voltage box 30 also includes a temperature acquisition element for acquiring the temperature of component 33; in response to the temperature of component 33 reaching a preset temperature, the first circuit board 332 controls driver 322 to drive the heat exchange medium to flow.

[0111] In this embodiment, the first circuit board 332 can serve as at least a part of a battery management unit (BMU). The first circuit board 332 can be implemented as either a printed circuit board or a flexible circuit board. The first circuit board 332 is electrically connected to a temperature acquisition element, which can be implemented as any of a temperature sensor, thermocouple, etc. In the technical solution where component 33 includes a busbar 331 and the busbar 331 can abut against the first part 3212, the temperature acquisition element is specifically used to acquire the temperature of the busbar 331. When the temperature acquisition element detects that the temperature of the busbar 331 is a preset temperature, the first circuit board 332 controls the driver 322 to drive the heat exchange medium to flow. Thus, by detecting the temperature of the busbar 331 and comparing it with the preset temperature, heat dissipation of the busbar 331 can be achieved in a timely manner. The preset temperature can be designed according to actual operating conditions; for example, the preset temperature can be any value among 45 degrees Celsius (°C), 50°C, 55°C, 60°C, and 65°C.

[0112] In related technologies, the first circuit board 332 is typically placed inside the battery compartment and located on one side of the battery cell. In this embodiment, by including the first circuit board 332 in the component 33, the first circuit board 332 is integrated into the high-voltage box 30. This frees up the space occupied by the first circuit board 332 inside the battery compartment, allowing more space to be used for arranging battery cells, which can improve the energy density of the battery device.

[0113] According to some embodiments of this application, component 33 further includes a second circuit board 333, which is used to collect information of individual battery cells and generate electrical signals, and the first circuit board 332 is capable of receiving electrical signals.

[0114] In this embodiment, the second circuit board 333 can serve as at least a part of a cell monitoring circuit (CSC). The second circuit board 333 is electrically connected to the individual battery cells, and can be implemented as either a printed circuit board or a flexible circuit board. The thickness direction of the first circuit board 332 and the thickness direction of the second circuit board 333 can be parallel or perpendicular to each other. As an example, please refer to... Figure 3 and Figure 6 The thickness direction of the first circuit board 332 is parallel to the second direction, the thickness direction of the second circuit board 333 is parallel to the first direction, and the second circuit board 333 is located on the side of the first circuit board 332 away from the first part 3212 and is attached to the cover 311.

[0115] In related technologies, the second circuit board 333 is typically placed inside the battery compartment and located on one side of the battery cell. In this embodiment, by including the second circuit board 333 in the component 33, both the first circuit board 332 and the second circuit board 333 are integrated into the high-voltage box 30. This not only helps to improve the energy density of the battery device, but also improves the modularity of the electrical system of the battery device.

[0116] It is understood that since the high voltage box 30 is equipped with a heat dissipation component 32, which can dissipate heat from the components 33, the risk of failure due to overheating of the components 33 in the high voltage box 30, which integrates the first circuit board 332, the second circuit board 333 and the bus 331 in this embodiment, is reduced, and the high voltage box 30 has good working reliability.

[0117] According to some embodiments of this application, along a second direction, the first circuit board 332 is located between the first wall 312 and the second wall 313. And, please refer to... Figure 6 The first circuit board 332 is opposite to the first wall 312 and forms a gap between them.

[0118] In this embodiment, the first circuit board 332 and the second portion 3213 are not only separated by the first wall 312, but the first circuit board 332 and the first wall 312 are also not in contact. "The first circuit board 332 is opposite to the first wall 312" means that the thickness direction of the first circuit board 332 is parallel to the thickness direction of the first wall 312. The size of the spacing space along the second direction can be reasonably designed according to needs and actual working conditions. Figure 6 In the middle, the first wall 312 is located on the side of the first circuit board 332 away from the busbar 331 and the relay 334.

[0119] This embodiment creates a space between the first circuit board 332 and the first wall 312, which facilitates a predetermined distance between the second part 3213 and the component 33 in the second direction. This further reduces the heat conducted from the component 33 to the second part 3213, resulting in better heat dissipation for the component when the heat exchange medium in the second part 3213 flows to the first part. This has a positive effect on the heat dissipation effect of the heat dissipation assembly 32.

[0120] According to some embodiments of this application, the large surface 3213a of the second part 3213 can be attached to the first wall 312. In this document, the large surface 3213a of the second part 3213 is defined as the surface with the largest area on the second part 3213. As an example, the second part 3213 has a cuboid plate structure, the large surface 3213a of the second part 3213 is perpendicular to the thickness direction of the second part 3213, both the second part 3213 and the first wall 312 are vertically arranged, and the second part 3213 is connected to the first part 3212 by a bend. Figure 6 In the specific example shown, the second part 3213 is arranged perpendicularly to the first part 3212, and the heat sink is correspondingly L-shaped.

[0121] Compared with the technical solution where the second part 3213 is horizontally positioned (i.e., the large surface 3213a of the second part 3213 is attached to the bottom wall of the box), this embodiment makes the large surface 3213a of the second part 3213 attached to the first wall 312. This helps to reduce the space occupied by the second part 3213 in the first direction inside the box. Without changing the height of the box, this helps to improve the volumetric energy density of the battery device.

[0122] In the battery device disclosed herein, the relationship between the first part 3212 and the second part 3213 is varied. In some embodiments, the first part 3212 and the second part 3213 may be independent components and separated from each other, in other words, the first part 3212 and the second part 3213 are physically separated.

[0123] According to some embodiments of this application, please refer to Figure 3 and Figure 7 The first part 3212 and the second part 3213 can be fixedly connected.

[0124] In this document, "fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. For example, the first part 3212 and the second part 3213 can be independently formed and then fixedly connected by welding, screwing, snap-fitting, or bonding. Alternatively, the first part 3212 and the second part 3213 can be integrally connected, meaning they are integrally formed. This eliminates the need for assembly steps between the first part 3212 and the second part 3213, and also improves the structural strength of the heat dissipation component 32 without increasing costs. Thus, in the technical solution where the first part 3212 is stacked below the busbar 331, the first part 3212 can stably support the component 33.

[0125] Compared with the technical solution where the first part 3212 and the second part 3213 are separated from each other, this embodiment makes the first part 3212 and the second part 3213 fixedly connected, which is conducive to making the structure of the heat dissipation component 32 compact, thereby reducing the space occupied by the high voltage box 30.

[0126] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0127] The electrical equipment includes vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc. It is understood that the electrical equipment provided in this application, by employing any of the aforementioned battery devices, possesses all the beneficial effects of those battery devices, which will not be elaborated further here.

[0128] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device described in the above embodiments, the battery device being used for energy storage.

[0129] Energy storage devices may include, but are not limited to, centralized energy storage devices (e.g., containerized energy storage devices), distributed energy storage devices, mobile energy storage devices, wearable energy storage devices, etc. It is understood that the energy storage device provided in this application, by employing any of the aforementioned battery devices, possesses all the beneficial effects of the aforementioned battery devices, which will not be elaborated further here.

[0130] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application.

[0131] A specific embodiment of this application is described below. It should be understood that this specific embodiment is described for illustrative purposes only and should not be construed as limiting the scope of this application.

[0132] Please refer to Figures 3 to 7The battery device 100 includes a housing 20, individual battery cells disposed within the housing 20, and a high-voltage box 30. The high-voltage box 30 includes a housing 31, a heat dissipation assembly 32, and components 33 and a temperature sensing element disposed within the housing 31. The heat dissipation assembly 32 includes a heat sink 321 and a water pump. The heat sink 321 is constructed as an "L"-shaped component and includes an integrally connected first part 3212 and a second part 3213, both of which have a plate-like structure. The first part 3212 has two channel groups spaced apart along its thickness direction (Z direction). Each channel group includes multiple channels 3211 sequentially spaced apart along the thickness direction (X direction) of the second part 3213. The multiple channels 3211 on the first part 3212 are connected in series to form a first sub-channel. The second part 3213 contains a cavity 3214 and multiple channels 3211 spaced apart along the Z direction. The multiple channels 3211 on the second part 3213 are connected in series to form a second sub-channel. Along the Z direction, the cavity 3214 is located on the side of the multiple channels 3211 on the second part 3213 opposite to the first part 3212. The cavity 3214 is not filled with heat exchange medium. The outlet of the cavity 3214 is connected to the input end of the water pump, the inlet of the cavity 3214 is connected to the outlet end of the first sub-channel, the output end of the water pump is connected to the inlet end of the second sub-channel, and the outlet end of the second sub-channel is connected to the inlet end of the first sub-channel. This makes the first sub-channel, the cavity 3214, the driver 322, and the second sub-channel connected end to end to form a circulating flow path. Driven by the driver 322, the heat exchange medium circulates along the circulating flow path.

[0133] Component 33 includes a main body, a first circuit board 332 (i.e., BMU), a second circuit board 333 (i.e., CSC), a relay 334, and a busbar 331. The busbar 331 is disposed between the main body and the first part 3212 and indirectly abuts against the first part 3212. A portion of the busbar 331 is located outside the housing 31 and connected to a single battery cell, allowing multiple battery cells to be connected in series or parallel through the busbar 331. The second circuit board 333 is disposed above the main body, and the first circuit board 332 is disposed on one side of the main body.

[0134] The box body 31 includes a lid 311, a first wall 312, and a second wall 313. The lid 311 presses over the second circuit board 333. The first wall 312 and the second wall 313 are located on opposite sides of the main body along the X direction. The thickness direction of the first circuit board 332 is parallel to the X direction. The first circuit board 332 and the first wall 312 are opposite to each other and a gap is formed between them. The second part 3213 is located on the side of the first wall 312 away from the first circuit board 332, and the second part 3213 is attached to the first wall 312.

[0135] The temperature acquisition element is used to acquire the temperature of the manifold 331. In response to the temperature of the manifold 331 reaching the preset temperature, the first circuit board 332 controls the water pump to drive the heat exchange medium to flow.

[0136] 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; A high-pressure box is disposed within the enclosure. The high-pressure box includes a box body, a heat dissipation assembly, and components disposed within the box body. The heat dissipation assembly includes a heat sink and a driver. The heat sink includes a first part and a second part. The first part exchanges heat with at least a portion of the components, while the second part does not exchange heat with the components. The second part has a cavity that serves as a receiving chamber. A first flow channel is formed within the heat sink. The first flow channel includes a first sub-flow channel and a second sub-flow channel. The first sub-flow channel is formed in the first part, and the second sub-flow channel is formed in the second part. The first sub-flow channel, the receiving chamber, the driver, and the second sub-flow channel are sequentially connected end-to-end to form a circulating flow path for receiving heat exchange medium. The circulating flow path is located within the enclosure and is configured as an independent flow path. The driver is configured to drive the heat exchange medium to circulate along the circulating flow path for heat exchange with at least a portion of the components.

2. The battery device according to claim 1, characterized in that, The volume of the heat exchange medium in the containment chamber is smaller than the volume of the containment chamber. The outlet of the containment chamber is connected to the input end of the driver. The inlet of the containment chamber is connected to the outlet end of the first flow channel. The output end of the driver is connected to the inlet end of the first flow channel.

3. The battery device according to claim 1, characterized in that, The receiving chamber and the heat dissipation component are formed independently.

4. The battery device according to claim 1, characterized in that, The battery device further includes a battery cell disposed inside the housing. The components include a busbar, a portion of which is located outside the housing and electrically connected to the battery cell. The busbar and the first portion are sequentially overlapped and contact each other for heat exchange along a first direction, the first direction being parallel to the thickness direction of the busbar.

5. The battery device according to claim 4, characterized in that, The box body includes a lid and a surrounding panel. The surrounding panel includes a first wall and a second wall that are disposed opposite to each other along a second direction. The first part is disposed opposite to the lid along the first direction and spaced apart. The first part, the lid, and the surrounding panel enclose a mounting cavity for accommodating the components. The first direction is perpendicular to the second direction. The second part is located on the side of the first wall away from the second wall.

6. The battery device according to claim 5, characterized in that, The components include a first circuit board and a second circuit board. The high-voltage box also includes a temperature acquisition element, which is used to acquire the temperature of the components. In response to the temperature of the components reaching a preset temperature, the first circuit board controls the driver to drive the heat exchange medium to flow. The second circuit board is used to acquire information of the battery cells and generate electrical signals. The first circuit board is able to receive the electrical signals.

7. The battery device according to claim 6, characterized in that, Along the second direction, the first circuit board is located between the first wall and the second wall, and the first circuit board is opposite to the first wall and forms a gap between the first wall and the first wall.

8. The battery device according to claim 5, characterized in that, The large surface of the second part is attached to the first wall.

9. The battery device according to claim 1, characterized in that, The components include a busbar and a relay arranged sequentially and connected along a first direction, the first direction being parallel to the thickness direction of the busbar, and the first portion extending along the first direction.

10. The battery device according to any one of claims 1 to 9, characterized in that, The first part and the second part are fixedly connected.

11. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1 to 10, the battery device being used to provide electrical energy.

12. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1 to 10, the battery device being used to store electrical energy.

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