Battery device, electric device, energy storage device, energy storage system, and charging network

Abstract

The application provides a battery device, a power consumption device, an energy storage device, an energy storage system and a charging network. The battery device comprises a battery assembly, a first heat exchange assembly and a second heat exchange assembly. The battery assembly comprises a plurality of battery monomers arranged in a first direction. The first heat exchange assembly has a first heat exchange channel and is arranged on one side of the battery assembly in a second direction. The first direction intersects the second direction. The second heat exchange assembly comprises a heat exchange element. The heat exchange element is arranged between at least two battery monomers, and part of the heat exchange element extends into the first heat exchange channel. The battery device can quickly heat the heat exchange element through the first heat exchange channel, so as to realize quick heat exchange between the heat exchange element and the battery monomers, and improve the service life and safety of the battery device.

Description

Technical Field

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

[0002] With the rapid development of new energy, the market is demanding increasingly higher performance from new energy battery devices.

[0003] A battery device consists of multiple battery cells, which continuously generate heat during operation. To reduce the impact of heat, heat dissipation measures are typically implemented for each battery cell. However, existing heat dissipation methods for battery devices are not ideal. Utility Model Content

[0004] The battery device, electrical equipment, energy storage device, energy storage system, and charging network provided in this application aim to solve the problem of the less-than-ideal heat dissipation methods of existing battery devices.

[0005] To solve the above-mentioned technical problems, the first technical solution adopted in this application is: to provide a battery device, the battery device comprising: A battery assembly, comprising a plurality of battery cells arranged sequentially along a first direction; The first heat exchange component has a first heat exchange channel and is disposed on one side of the battery component along the second direction, the first direction intersecting the second direction; The second heat exchange assembly includes a heat exchange element disposed between at least two battery cells; and a portion of the heat exchange element extends into the first heat exchange channel.

[0006] The aforementioned battery device, by incorporating a heat exchanger positioned between at least two battery cells and with a portion of the heat exchanger extending into a first heat exchange channel, achieves two objectives: firstly, heat exchange between the heat exchanger and the battery cells, thereby reducing the temperature of the battery cells; secondly, rapid heat exchange (e.g., heat dissipation) of the heat exchanger is achieved through the first heat exchange channel, thus realizing rapid heat exchange between the heat exchanger and the battery cells, thereby improving the lifespan and safety of the battery device.

[0007] In one embodiment, the heat exchanger includes: a heat exchange section; a first projection of a single battery cell onto the heat exchanger along a first direction, the first projection coinciding with the heat exchange section; and a portion of the heat exchange section extending into a first heat exchange channel. Thus, the contact area between the heat exchanger and the heat exchange medium within the first heat exchange channel is large, which can improve heat exchange efficiency and accelerate the heat exchange process.

[0008] In one embodiment, the heat exchanger includes: Heat exchange section; The orthographic projection of a single battery cell onto the heat exchange component along the first direction is the first projection, and the first projection coincides with the heat exchange section; An edge portion is disposed on at least one side of the heat exchange portion along a third direction and located outside the first projection; wherein the heat exchange portion is outside the first heat exchange channel, and a portion of the edge portion extends into the first heat exchange channel; wherein the third direction is perpendicular to the first direction and intersects with the second direction.

[0009] The above-described scheme, by having a portion of the edge extend into the first heat exchange channel while the heat exchange section is located outside the channel, allows the heated and evaporating gas within the heat exchange component to be cooled primarily through the edge within the air duct. The coolant, under gravity, can then naturally flow back through the flow channels within the edge. This not only achieves circulating heat exchange within the heat exchange component but also, compared to the heat exchange section, results in less upward evaporation of heated gas along the second direction within the edge. This reduces the impact of the airflow on the downward flow of the coolant, effectively accelerating the heat exchange process and improving the heat exchange efficiency.

[0010] In one embodiment, the heat exchange section is provided with an edge portion on each side along the third direction; a partition plate is provided inside the heat exchange component, the partition plate extends along the second direction to the two side edges of the heat exchange component and abuts against the first heat exchange component, so as to divide the heat exchange component into two independent regions along the third direction.

[0011] The above solution allows the airflow on both sides of the partition plate to flow to the corresponding edge, effectively improving the airflow uniformity on both sides of the edge, and thus effectively improving the heat exchange uniformity of the heat exchanger along the third direction.

[0012] In one embodiment, the heat exchanger has a second heat exchange channel, within which a reinforcing structure is provided. This increases the support strength of the heat exchanger and reduces the risk of the heat exchanger being crushed due to pressure after the battery cells expand due to heat.

[0013] In one embodiment, the reinforcing structure includes a first reinforcing rib and / or a second reinforcing rib. The second heat exchange channel has opposing first and second sidewalls along a first direction; the first reinforcing rib is disposed on the first sidewall and spaced apart from the second sidewall. The second reinforcing rib is disposed on the second sidewall and spaced apart from the first sidewall.

[0014] The above solution can ensure that the heat exchange component has a certain supporting strength while adapting to the thermal expansion of the battery cell, buffering the pressure generated by the squeezing of the battery cell, reducing the risk of poor contact between the battery cell and the heat exchange component due to the different thermal expansion coefficients between different materials, and promoting good contact between the heat exchange component and the battery cell to maintain a stable heat conduction path, thereby improving the heat exchange effect.

[0015] In one embodiment, the first heat exchange component includes a ventilation plate; the first heat exchange channel includes an air duct formed within the ventilation plate, the air duct having an air inlet and an air outlet.

[0016] The above-described solution, by incorporating a ventilation plate and including an air duct formed within the ventilation plate in the first heat exchange channel, utilizes the airflow passing through the air duct to dissipate heat at the ends of the heat exchange components. Compared to simple fan cooling, the airflow is more concentrated, resulting in better heat dissipation. Furthermore, compared to liquid cooling, this solution eliminates the need for a cold source, which helps reduce the load and cost of the cooling system.

[0017] In one embodiment, the first heat exchange component further includes: A first baffle is movably connected to the air inlet, and the first baffle may cover or expose the air inlet under the action of external force; and / or The second baffle is movably connected to the air outlet, and the second baffle can cover or expose the air outlet under the action of external force.

[0018] The above solution improves the airtightness of the air duct by installing a first baffle at the air inlet, which can be covered by external force. This reduces the risk of external dust and impurities entering the air duct and clogging the heat exchange interface of the heat exchange components, thus affecting heat exchange. Simultaneously, by allowing the first baffle to be exposed under external force, it can automatically open and expose the air inlet when the air pressure is high, allowing natural air to enter the air duct and cool the heat exchange components. Compared to the battery device's constant reliance on fan cooling, this solution reduces noise and energy consumption.

[0019] In addition, by installing a second baffle at the air outlet, which can be covered by external force, the airtightness of the duct is improved, reducing the risk of external dust and impurities entering the duct and clogging the heat exchange interface of the heat exchange components, thus affecting heat exchange. At the same time, by allowing the second baffle to be exposed at the air outlet under external force, a flow channel for air is formed, thereby cooling the heat exchange components within the duct.

[0020] In one embodiment, the first heat exchange component includes: The inner structure is an elastic structure, which forms the first heat exchange channel. The outer structure is located outside the inner structure and encloses the entire inner structure.

[0021] In the above scheme, the inner layer structure of the first heat exchange component adopts an elastic structure, which can increase the sealing reliability between the first heat exchange channel and the heat exchange element, eliminate the secondary assembly and sealing process between the first heat exchange channel and the heat exchange element, improve the airtightness of the first heat exchange channel, and facilitate the reduction of the wall thickness of the first heat exchange component. At the same time, by setting an outer layer structure on the outside of the inner layer structure, the mechanical strength of the first heat exchange component can be improved, which is beneficial to the installation and positioning between the heat exchange element and the first heat exchange component.

[0022] In one embodiment, it further includes: a flow divider plate disposed in the first heat exchange channel and located on the side of the heat exchanger facing the inlet of the first heat exchange channel; the flow divider plate has a plurality of flow divider holes along a third direction, the diameter of the plurality of flow divider holes gradually increasing along the direction away from the inlet; wherein the third direction intersects with the first direction.

[0023] The above scheme can adjust the flow rate of the heat exchange medium at various positions along the third direction in the first heat exchange channel by using the flow divider, so that the flow rate of the heat exchange medium at various positions along the third direction in the first heat exchange channel is basically the same, thereby improving the heat dissipation uniformity and helping to uniformly measure the temperature of the battery module at various positions along the third direction.

[0024] In one embodiment, the portion of the heat exchanger extending into the first heat exchange channel includes at least one extension portion; the extension portion has a comb-like structure.

[0025] The above solution, by making the extension part a comb-like structure, can increase the heat exchange area of ​​the extension part, thereby enhancing heat exchange and improving heat exchange efficiency.

[0026] In one embodiment, the second heat exchange assembly includes multiple heat exchange elements arranged sequentially along a first direction; the extension portions on adjacent heat exchange elements are staggered along the first direction. This allows the heat exchange medium in the first heat exchange channel to better remove heat from the downstream heat exchange elements along its flow path, improving heat dissipation efficiency and uniformity.

[0027] In one embodiment, the battery device further includes a fan, in communication with a duct, and configured to drive an airflow within the duct.

[0028] The above solution, by adding a fan, can actively cool the extension section when the external natural wind pressure applied to the first baffle is low. When the external natural wind pressure applied to the first baffle is high, natural wind can replace the fan for cooling the extension section, with the fan only operating briefly when necessary. Compared to a solution that always uses a fan for cooling, this solution reduces both the overall energy consumption of the battery device and noise. Of course, when the external natural wind pressure applied to the first baffle is high, both natural wind and the fan can work together to cool the extension section, significantly improving heat dissipation efficiency.

[0029] In one embodiment, the battery device further includes: The sensing component is configured to sense the air pressure at the air inlet and the temperature of the battery assembly; The controller is electrically connected to the sensing components and the fan respectively; the controller is configured to control the fan to start operating when the wind pressure is less than or equal to a first threshold and the temperature of the battery components is greater than a first preset temperature.

[0030] The above solution addresses situations where the wind pressure is too low to open the first baffle and allow natural air to enter the duct, but the battery module temperature is high. In these cases, a fan can actively deliver air to cool the extended portion, facilitating rapid heat dissipation from the individual battery cells. Furthermore, the fan operates only when the wind pressure is low and stops when it is high, effectively reducing energy consumption and fan noise. Additionally, this solution allows for automatic fan start-up and shutdown, demonstrating a high degree of automation.

[0031] In one embodiment, the controller is configured as follows: When the wind pressure is less than or equal to the first threshold, and the temperature of the battery assembly is greater than the first preset temperature and less than the second preset temperature, the fan is controlled to start running at the first power. When the wind pressure is less than or equal to the first threshold and the temperature of the battery assembly is greater than the second preset temperature, the fan is controlled to start operating at the second power; wherein the first power is less than the second power.

[0032] The above solution utilizes natural wind to completely replace the fan when the wind pressure is high. This not only cools the extension section but also reduces noise other than wind noise. When natural wind is insufficient to dissipate the heat from the battery pack in time, the fan can be controlled to operate at a certain power based on the wind pressure and the temperature of the battery pack. In this way, the fan can cool the extension section by delivering air, and the fan's operating power is controllable, which can reduce the noise of the fan operation to a certain extent and reduce energy consumption.

[0033] In one embodiment, it also includes: A heating structure, disposed within an air duct and positioned along a first direction near the air inlet of the air duct, is configured to heat the airflow within the air duct; and / or The dustproof net is installed inside the air duct and is located in the first direction near the air inlet of the air duct. The above solution can heat the air entering the air duct through a heating structure, thereby heating the battery cells with hot air. And / or, a dustproof screen can reduce the entry of dust and impurities, thus reducing the risk of dust and impurities entering the air duct and clogging the heat exchange interface of the heating structure and heat exchange components, affecting heat exchange.

[0034] To solve the above-mentioned technical problems, the second technical solution adopted in this application is to provide an electrical device that includes the battery device mentioned above.

[0035] To solve the above-mentioned technical problems, the third technical solution adopted in this application is to provide an energy storage device, which includes the battery device mentioned above.

[0036] To solve the above-mentioned technical problems, the fourth technical solution adopted in this application is: to provide an energy storage system, which includes a power conversion device and the aforementioned energy storage device, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0037] To solve the above-mentioned technical problems, the fifth technical solution adopted in this application is to provide a charging network, which includes charging piles and the energy storage device mentioned above, and the energy storage device is used to provide power to the charging piles.

[0038] 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

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. 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: Figure 1 This is a schematic diagram of the structure of a charging network provided in an embodiment of this application; Figure 2 This is a schematic diagram of the energy storage device in one embodiment of this application; Figure 3 This is a schematic diagram of the energy storage system in one embodiment of this application; Figure 4 This is a schematic diagram of the structure of an electrical device in one embodiment of this application; Figure 5 An exploded view of a battery device provided in an embodiment of this application; Figure 6 A vertical cross-sectional view of a battery device provided in an embodiment of this application along a first direction; Figure 7 for Figure 6 Enlarged view of point A in the structure shown; Figure 8 A simplified structural diagram of a heat exchanger partially extending into a first heat exchange channel according to an embodiment of this application; Figure 9 A simplified structural diagram showing a portion of a heat exchanger extending into a first heat exchange channel, according to another embodiment of this application. Figure 10 A simplified structural diagram showing a portion of a heat exchanger extending into a first heat exchange channel, according to yet another embodiment of this application. Figure 11Provided for an embodiment of this application Figure 9 The heat exchanger shown is a cross-sectional view along the CC direction. Figure 12 A schematic diagram showing the location of the reinforcing structure and the second heat exchange channel according to an embodiment of this application; Figure 13 This is a schematic diagram of the structure of a first baffle covering an air inlet according to an embodiment of this application; Figure 14 This is a schematic diagram of the structure of the first baffle exposed at the air inlet according to an embodiment of this application; Figure 15 This is a schematic diagram of the structure of the second baffle covering the air outlet provided in one embodiment of this application; Figure 16 This is a schematic diagram of the structure of the second baffle exposed at the air outlet according to an embodiment of this application; Figure 17 A vertical cross-sectional view of a first heat exchange component provided in an embodiment of this application along a third direction; Figure 18 This is a schematic diagram of the internal structure of a first heat exchange channel provided in an embodiment of this application; Figure 19 for Figure 18 Enlarged view of point B in the structure shown; Figure 20 A schematic diagram of a flow divider disposed in a first heat exchange channel according to an embodiment of this application; Figure 21 This is a schematic diagram of a heat exchanger extending into a first heat exchange channel according to an embodiment of this application.

[0040] Explanation of reference numerals in the attached figures 1000 Charging network; 2000 Energy storage system; 3000 Power generation device; 100 Battery device; 200 Energy storage device; 210 Energy storage enclosure; 300 Charging pile; 400 Energy storage converter; 500 Electrical device; 10 Battery module; 11 Battery cell; 20 First heat exchange component; 20a Ventilation plate; 201 Inner structure; 202 Outer structure; 21 First heat exchange channel; 211 Air duct; 22 Air inlet; 23 Air outlet; 24 First 25 Baffle; 26 Second baffle; 27 Guide plate; 28 Heating structure; 29 Dustproof net; 30 Limiting block; 30 Heat exchanger; 30a Heat exchange section; 30b Edge section; 31 Extension section; 32 Second heat exchange channel; 33 Partition plate; 34 Reinforcing structure; 341 First reinforcing rib; 342 Second reinforcing rib; 40 Thermal pad; 50 Heating film; 60 Support frame; 61 Reinforcing plate; 70 Diverter plate; 71 Diverter hole; 81 Front end plate; 82 Rear end plate; 90 Fan. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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).

[0047] 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 are not intended to 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.

[0048] In the description of the embodiments of this application, unless otherwise expressly specified and limited, 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.

[0049] In related technologies, battery devices typically employ liquid cooling or air cooling for heat dissipation. Liquid cooling involves exchanging heat between the battery components and a coolant of varying temperatures. While liquid cooling offers high heat dissipation efficiency, the system is complex and requires a separate cooling source for the entire vehicle, such as a water pump supplying the refrigerant, increasing the overall vehicle's temperature control costs and workload.

[0050] Air cooling includes single-air cooling and forced air cooling. Single-air cooling usually involves placing a fan on the side or bottom of the battery pack, relying on natural convection between the surface of the battery pack and the air to dissipate heat; however, this cooling method results in a dispersed airflow path, making it difficult to effectively cool the high-temperature central area of ​​the battery cell.

[0051] Forced air cooling uses fans located on one side or at the end of the battery pack to guide airflow through the gaps between battery cells or over the surface of the battery pack to remove heat. However, traditional forced air cooling systems typically require high-power fans that run continuously to meet maximum heat dissipation conditions (such as fast charging and high-rate discharging), resulting in increased energy consumption and unnecessary noise for the entire vehicle.

[0052] Based on this, this application provides a battery device that can dissipate heat from the heat exchanger through airflow within a first heat exchange channel. The airflow path is more concentrated, enabling faster removal of heat generated by individual battery cells, thereby improving the battery device's lifespan and safety. Furthermore, this solution eliminates the need for a cold source, which helps reduce the overall load and cost of the cooling system.

[0053] The battery device disclosed in this application can be applied to electrical equipment, or to energy storage devices such as energy storage containers or energy storage cabinets.

[0054] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0055] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a charging network 1000 provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of an energy storage device 200 provided in one embodiment of this application. In one embodiment, a charging network 1000 is provided, which includes a charging pile 300 and an energy storage device 200. The charging pile 300 is used to charge electrical equipment. The energy storage device 200 is electrically connected to the charging pile 300 and is used to provide electrical energy to the charging pile 300.

[0056] It should be noted that the charging pile 300 and the battery cells in the energy storage device 200 are electrically connected via cables, and the battery cells can supply their stored electrical energy to the charging pile 300. The charging pile 300 has a connector that can be connected to electrical equipment, thereby replenishing the equipment's power. The application of the energy storage device 200 in this charging network 1000 can effectively improve the safety of the charging network 1000 and also help to enhance the flexibility of the charging network 1000 during deployment.

[0057] In a charging network 1000, there can be one charging pile 300, and the energy storage device 200 provides power to the one charging pile 300; there can also be multiple charging piles 300, and the energy storage device 200 provides power to multiple charging piles 300.

[0058] As an example, such as Figure 1 As shown, the charging network 1000 includes an energy storage device 200 and two charging piles 300, with the energy storage device 200 providing power to the two charging piles 300.

[0059] See Figure 2 The energy storage device 200 may include a battery device 100, which is electrically connected to the charging pile 300 so that the battery device 100 can provide power to the charging pile 300.

[0060] Please refer to Figure 2 and Figure 3 , Figure 3 This is a schematic diagram of the structure of an energy storage system 2000 provided in an embodiment of this application. The energy storage system 2000 includes an energy storage converter 400, a power conversion device, and an energy storage device 200.

[0061] The energy storage converter 400 can be electrically connected to the generator 3000 to convert the electrical power provided by the generator 3000. The energy storage device 200 is electrically connected to the energy storage converter 400, and the energy storage converter 400 converts the electrical energy provided by the generator 3000 and stores it in the energy storage device 200.

[0062] A power conversion device is used to connect the power generation device 3000 and the energy storage device 200. The power generation device 3000 generates electrical energy and stores it in the energy storage device 200 via the power conversion device. The use of the energy storage device 200 in the energy storage system 2000 effectively improves its operational safety. In specific implementations, the power generation device 3000 can be a solar panel, hydroelectric power generation equipment, thermal power generation equipment, etc. This application does not limit the specific type of the power generation device 3000.

[0063] As an example, such as Figure 3 As shown, the energy storage system 2000 includes an energy storage device 200 and an energy storage converter 400. The two power generation devices 3000 respectively transmit the generated electrical energy to the energy storage converter 400, and the energy storage converter 400 introduces the electrical energy into the energy storage device 200 for storage.

[0064] Please refer to Figure 2 The energy storage device 200 also includes an energy storage box 210, in which a battery device 100 is installed.

[0065] As an example, the energy storage device 200 can be an energy storage container, an energy storage cabinet, etc.

[0066] As an example, energy storage device 200 can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage power stations can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. Wind power generation systems collect wind energy from wind turbines, convert it into electrical energy, and store it in energy storage device 200. Solar power generation systems can convert solar energy into electrical energy, store it in energy storage device 200, and supply it to users as needed. Mobile power systems can supply power to relevant electrical equipment in areas where the mains power supply cannot reach, such as remote mountainous areas and remote wilderness areas. Temporary power supply systems can provide power to users when there is insufficient power supply.

[0067] Please see Figure 4 , Figure 4This is a schematic diagram of the structure of an electrical device according to one embodiment of this application. In one embodiment, an electrical device is provided, which includes an electrical component 500 and a battery device 100, wherein the battery device 100 is electrically connected to the electrical component 500. The battery device 100 is used to provide electrical energy to the electrical component 500, enabling the electrical component 500 to operate.

[0068] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. 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. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. 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.

[0069] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0070] The power-consuming device 500 can be a component or device capable of consuming electricity; the power-consuming device 500 can be a controller and electronic components, etc., and the controller can be a central processing unit (CPU), digital signal controller (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.

[0071] In some examples, the electrical equipment can be a vehicle, and the electrical component 500 can be the vehicle's lights (e.g., headlights, taillights, etc.), display screen, dashboard, control system (e.g., controller), etc. The vehicle may also include a frame, on which both the battery device 100 and the electrical component 500 are mounted.

[0072] See Figures 5 to 6 , Figure 5 An exploded view of a battery device 100 provided in an embodiment of this application; Figure 6 A vertical cross-sectional view of a battery device 100 provided in an embodiment of this application along a first direction; Figure 7 for Figure 6 Enlarged view of point A in the structure shown.

[0073] In one embodiment, a battery device 100 is provided, comprising a battery assembly 10, a first heat exchange assembly 20, and a second heat exchange assembly. The battery assembly 10 includes a plurality of battery cells 11 arranged sequentially along a first direction X. The first heat exchange assembly 20 has a first heat exchange channel 21 and is disposed on one side of the battery assembly 10 along a second direction Z, where the first direction X intersects the second direction Z. The second heat exchange assembly includes a heat exchange element 30 disposed between at least two battery cells 11, with a portion of the heat exchange element 30 extending into the first heat exchange channel 21.

[0074] In some embodiments, multiple battery cells 11 can be connected in series, parallel, or mixed to form a battery module 10. In other embodiments, multiple battery cells 11 can also be connected in series, parallel, or mixed first, and then arranged in a fixed manner to form a battery module 10. In still other embodiments, multiple battery cells 11 can also be connected in series, parallel, or mixed first, and then arranged in a fixed manner to form multiple modules, which are then connected in series, parallel, or mixed to form a whole.

[0075] As an example, multiple battery cells 11 can be fixed together to form a battery assembly 10 using cable ties or the like. As another example, multiple battery cells 11 can also be fixed together to form a battery assembly 10 using end plates, side plates, or the like.

[0076] The battery cell 11 involved in this application refers to the smallest unit for storing and outputting electrical energy. The battery cell 11 can be a secondary battery or a primary battery. The battery cell 11 can be, but is not limited to, a metal battery, a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The battery cell 11 can be cylindrical, flat, cuboid, or other shapes.

[0077] The battery cell 11 may include a casing, electrode assemblies, and other functional components. The casing includes an end cap and a bottom shell. The end cap is a component that closes onto the opening of the bottom shell to isolate the internal environment of the battery cell 11 from the external environment. In any case, the shape of the end cap may be adapted to the shape of the bottom shell. Optionally, the end cap may be made of a material with a certain degree of hardness and strength (such as aluminum alloy), so that the end cap is less prone to deformation under pressure and impact, giving the battery cell 11 higher structural strength and improved safety performance.

[0078] The end cap may be provided with functional components such as electrode terminals. The electrode terminals can be used for electrical connection with the electrode assembly to output or input electrical energy to the battery cell 11. In some embodiments, the electrode terminals may include terminals. Terminals may include positive and negative terminals for current output and connection to external circuits. In some embodiments, the end cap may also be provided with an explosion-proof component for releasing internal pressure when the internal pressure or temperature of the battery cell 11 reaches a threshold. The end cap can be made of various materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic. In some embodiments, an insulating component may be provided on the inner side of the end cap to isolate the electrical connection components within the bottom shell from the end cap, reducing the risk of short circuits. For example, the insulating component may be plastic, rubber, etc. The bottom shell is an assembly used to cooperate with the end cap to form the internal environment of the battery cell 11, wherein the formed internal environment can accommodate the electrode assembly, electrolyte, and other components. The bottom shell and end cap can be independent components. An opening can be provided on the bottom shell, and the end cap closes the opening to form the internal environment of the battery cell 11. Alternatively, the end cap and bottom shell can be integrated. Specifically, the end cap and bottom shell can form a common connection surface before other components are installed. When it is necessary to encapsulate the interior of the bottom shell, the end cap closes the bottom shell. The bottom shell can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the bottom shell can be determined according to the specific shape and size of the electrode assembly. The bottom shell can be made of various materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0079] The electrode assembly is the component within the battery cell 11 where electrochemical reactions occur. The bottom casing may contain one or more electrode assemblies. The electrode assembly is primarily formed by winding or stacking positive and negative electrode sheets, and typically includes a separator between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly, while the portions without active material each constitute a tab. The positive and negative tabs may be located together at one end of the main body or separately at both ends. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0080] This application defines the side of the end cap of the battery cell 11 facing away from the bottom shell as the top of the battery assembly 10, and the side of the bottom shell facing away from the end cap as the bottom of the battery assembly 10. The side of the battery cell 11 includes two large surfaces and two small surfaces arranged opposite each other, with the two large surfaces connected together by the small surfaces. The area of ​​the large surface is larger than the area of ​​the small surface. The straight-line distance between the two large surfaces is the thickness of the battery cell 11. The distance between the top and bottom of the battery cell 11 is the height of the battery cell 11.

[0081] In one example, the first direction X is the thickness direction of the battery cell 11. The second direction Z is the height direction of the battery cell 11.

[0082] In one example, the first heat exchange assembly 20 includes a hollow structure open at both ends. The internal hollow region of this hollow structure serves as a first heat exchange channel 21. The first heat exchange channel 21 has an inlet and an outlet. The heat exchange medium enters the first heat exchange channel 21 from the inlet and flows out of the first heat exchange channel 21 from the outlet. The heat exchange medium can circulate within the first heat exchange channel 21 to exchange heat with the heat exchange elements extending into the first heat exchange channel 21.

[0083] The heat exchange medium can be a cooling medium, which can be natural air or coolant.

[0084] In one example, the heat exchange medium is natural wind. When the battery device 100 is applied to electrical equipment, such as a vehicle, the inlet of the first heat exchange channel 21 faces the front of the vehicle, so that natural wind can enter the first heat exchange channel 21 and carry away the heat on the heat exchanger 30 during the vehicle's movement.

[0085] In one example, the first heat exchange component 20 is disposed on the top of the battery assembly 10 along the second direction Z, and the following embodiments of this application will all use this as an example. Of course, in other examples, the first heat exchange component 20 may also be disposed on one side of the battery assembly 10 along the third direction Y, that is, on the side where the small face of the battery assembly 10 is located. Alternatively, a first heat exchange component 20 may be disposed on the top of the battery assembly 10 and on the side where the small face is located, respectively, to improve heat dissipation efficiency.

[0086] For example, the vertical cross-section of the first heat exchange component 20 along the second direction Z is rectangular or trapezoidal. The first heat exchange component 20 has a slot on the side facing the heat exchange element 30, and the heat exchange element 30 is inserted into the first heat exchange channel 21 through the slot.

[0087] In some embodiments, a sealing structure, such as sealant, is provided at the connection between the first heat exchange component 20 and the heat exchange element 30 to improve the sealing performance of the first heat exchange channel 21 and reduce the risk of heat exchange medium flowing out from the gap between the first heat exchange component 20 and the heat exchange element 30.

[0088] The second heat exchange assembly includes multiple heat exchange elements 30, each of which is independent of the others. This allows for more flexible arrangement of the heat exchange elements 30 and provides better sealing performance.

[0089] In one example, multiple battery cells 11 are spaced apart along a first direction X, and the large surfaces of every two adjacent battery cells 11 are arranged opposite each other along the first direction X; a heat exchanger 30 is provided between every two adjacent battery cells 11; thus, the temperature of the two adjacent battery cells 11 can be exchanged through the heat exchanger 30; and since there is a heat exchanger 30 between every two adjacent battery cells 11, the temperature of the central region of the battery assembly 10 can be quickly conducted to the top or side of the battery assembly 10 through the heat exchanger 30, and carried away by the heat exchange medium in the first heat exchange channel 21 to achieve heat dissipation.

[0090] In this example, the central region of the battery assembly 10 refers to the central region of one or more battery cells 11 located at the middle position of the battery assembly 10 along the first direction X.

[0091] In one example, the heat exchanger 30 has a second heat exchange channel 32, in which a heat exchange medium is disposed to exchange heat with the battery cell 11.

[0092] In one example, such as Figure 5 As shown, the battery device 100 also includes a thermal pad 40, which is disposed between the heat exchanger 30 and the battery cell 11. The heat exchanger 30 contacts the battery cell 11 through the thermal pad 40, so that the heat of the battery cell 11 can be better conducted to the heat exchanger 30 through the thermal pad 40 for heat exchange.

[0093] For example, a thermal pad 40 is provided between each heat exchanger 30 and the adjacent battery cell 11, and the thermal pad 40 may be the same size as the heat exchanger 30.

[0094] For example, both the heat exchanger 30 and the thermal pad 40 are plate-shaped, and the area of ​​the heat exchanger 30 and the thermal pad 40 is the same as or substantially the same as the area of ​​the large surface of the battery cell 11.

[0095] Of course, in other examples, the heat exchanger 30 may also be in direct contact with the adjacent battery cell 11.

[0096] In some examples, the heat exchanger 30 extends into the first heat exchange channel 21 along one edge of the second direction Z. Exemplarily, the portion of the heat exchanger 30 extending into the first heat exchange channel 21 extends through the entire first heat exchange channel 21 along the second direction Z to increase the contact area between the heat exchanger 30 and the heat exchange medium within the first heat exchange channel 21, thereby improving heat dissipation efficiency. In the following embodiments of this application, the portion of the heat exchanger 30 extending into the first heat exchange channel 21 is defined as the extension portion 31.

[0097] In one example, the portion of the heat exchanger 30 extending into the first heat exchange channel 21 includes at least one extension 31. Exemplarily, the portion of the heat exchanger 30 extending into the first heat exchange channel 21 includes multiple extensions 31, which are spaced apart along a third direction Y.

[0098] In some examples, the battery device 100 further includes a heating film 50, a support frame 60, a reinforcing plate 61, a front end plate 81, and a rear end plate 82. The heating film 50 is disposed on the bottom and / or one side of the battery assembly 10 for heating the battery assembly 10. The battery assembly 10 is mounted on the support frame 60, which supports the battery assembly 10. The reinforcing plate 61 is disposed on the support frame 60 to increase the support strength of the support frame 60. There may be two reinforcing plates 61, which may be disposed on opposite sides of the support frame 60. For example, the reinforcing plates 61 may be disposed on both sides of the support frame 60 along a third direction Y, and located on the surface of the support frame 60 opposite to the battery assembly 10. The front end plate 81 and the rear end plate 82 are disposed on both sides of the battery assembly 10 along a first direction X.

[0099] The battery device 100 provided in this embodiment, by setting a heat exchanger 30 and placing the heat exchanger 30 between at least two battery cells 11, and having part of the heat exchanger 30 extend into the first heat exchange channel 21, can exchange heat with the battery cells 11 through the heat exchanger 30 to reduce the temperature of the battery cells 11. On the other hand, it can quickly exchange heat (such as dissipate heat) with the heat exchanger 30 through the heat exchange medium in the first heat exchange channel 21, thereby realizing rapid heat exchange between the heat exchanger 30 and the battery cells 11, and thus improving the lifespan and safety of the battery device 100.

[0100] In one embodiment, the heat exchanger 30 is a temperature equalization element. In this way, the heat from the central region of the adjacent battery cell 11 can be quickly drawn to the edge region through the temperature equalization element, so as to equalize the temperature between the central region and the edge region of the adjacent battery cell 11, improve the temperature uniformity between the central region and the edge region of the battery cell 11, and effectively cool down the high-temperature region in the middle of the battery assembly 10.

[0101] The central and edge regions of the battery cell 11 refer to the central and edge regions of the surface of the battery cell 11 that contacts the heat exchanger 30. The central region can be a circular region or a polygonal region; the straight-line distance between each side of the polygonal region and the center of the central region is the same. The polygonal region can be a square region, a triangular region, or a hexagonal region, etc.

[0102] Temperature balance between the central region and the edge region of battery cell 11 means that the temperature difference between the central region and the edge region of battery cell 11 is not greater than a threshold; for example, the threshold can be 5°.

[0103] In one example, all heat exchange components 30 are temperature equalization components; this example is used in all embodiments of this application. Of course, in other examples, some of the heat exchange components 30 may be temperature equalization components, while the other heat exchange components 30 may be heating or cooling components.

[0104] In one example, the temperature homogenizer includes a housing, a liquid wick, and a phase change medium. The housing has a phase change channel; the liquid wick and the phase change medium are disposed within the phase change channel. The temperature homogenization process of the temperature homogenizer is as follows: When the temperature homogenizer comes into contact with the higher temperature region of the battery cell 11, the liquid phase change medium within the temperature homogenizer can be vaporized due to the higher temperature of the battery cell 11. The vaporized phase change medium can move within the phase change channel to the lower temperature region of the battery cell 11. The gaseous phase change medium within the temperature homogenizer can be liquefied due to the lower temperature of the battery cell 11. The liquefied phase change medium can wet the liquid wick, so that it can diffuse to the higher temperature region of the battery cell 11 under the action of the liquid wick. The gaseous and liquid phase change medium circulate within the phase change channel, realizing heat conduction of the battery cell 11 and reducing the temperature difference between the central and edge regions of the battery cell 11.

[0105] In this example, it can be understood that the end of the heat spreader that contacts the higher-temperature region (such as the central region) of the battery cell 11 is the high-temperature part, and the end of the heat spreader that contacts the lower-temperature region (such as the edge region) of the battery cell 11 is the condensation part. In this example, the condensation part of the heat spreader is positioned towards the first heat exchange assembly 20 and extends into the first heat exchange channel 21 for heat dissipation. It can be understood that the portion of the condensation part extending into the first heat exchange channel 21 is the extension part 31. The following embodiments of this application all use this as an example.

[0106] For example, all the condensation portions of the temperature equalizer extend into the first heat exchange channel 21; or a portion of the condensation portions of the temperature equalizer extend into the first heat exchange channel 21.

[0107] In one example, the heat spreader is a heat spreader plate with a thickness greater than or equal to 0.5 mm and less than or equal to 1.5 mm. For example, the thickness of the heat spreader plate can be 0.5 mm, 0.7 mm, 0.9 mm, 1.1 mm, 1.3 mm, or 1.5 mm.

[0108] The heat conduction path in this embodiment is as follows: the heat generated by the battery cell 11 is conducted to the high-temperature part of the heat exchanger through the heat-conducting pad 40, and then carried away by the air flow in the first heat exchange channel 21 through the condensation part of the heat exchanger, and then discharged from the battery assembly 10 through the outlet.

[0109] In this embodiment, by making the heat exchanger 30 a temperature equalization element, the heat in the central region of the battery cell 11 can be quickly conducted to the first heat exchange channel 21 for rapid heat dissipation, and the temperature difference between the central region and the edge region of the battery cell 11 can be balanced. The maximum temperature difference of the battery cell 11 can be reduced to less than 3°C, which significantly improves the temperature uniformity of the battery cell 11, delays aging, and improves the safety of the battery device 100.

[0110] In one embodiment, see Figure 8 , Figure 8 This is a simplified structural diagram of a heat exchanger 30 provided in an embodiment of this application, in which a portion extends into the first heat exchange channel 21. The heat exchanger 30 includes a heat exchange portion 30a. The orthographic projection of the battery cell 11 along the first direction X onto the heat exchanger 30 is a first projection, which coincides with the heat exchange portion 30a; a portion of the heat exchange portion 30a extends into the first heat exchange channel 21.

[0111] The portion of the heat exchanger 30 covered by the battery cell 11 along the first direction X is referred to as the heat exchange section 30a. The heat exchange section 30a does not have a de facto dividing line.

[0112] In one example, the condenser portion on the heat exchange section 30a extends into the first heat exchange channel 21, with at least a portion of the condenser portion extending into the first heat exchange channel 21 along the second direction Z. Exemplarily, the entire condenser portion extends into the first heat exchange channel 21 along the second direction Z.

[0113] In one example, see Figure 8 The condenser extends at least part of its length in the first heat exchange channel 21 along the third direction Y.

[0114] In this embodiment, the condensation section of the heat exchange unit 30a can be directly heated by the heat exchange medium in the first heat exchange channel 21, resulting in a shorter heat exchange path. Furthermore, the contact area between the heat exchange element 30 and the heat exchange medium in the first heat exchange channel 21 is large, which can improve heat exchange efficiency and accelerate the heat exchange process.

[0115] In one embodiment, see Figure 9 , Figure 9This is a simplified structural diagram of a heat exchanger 30, provided in another embodiment of this application, partially extending into a first heat exchange channel 21. The heat exchanger 30 includes a heat exchange portion 30a and an edge portion 30b. The orthographic projection of the battery cell 11 along the first direction X onto the heat exchanger 30 is a first projection, which coincides with the heat exchange portion 30a. The edge portion 30b is disposed along a third direction Y on at least one side of the heat exchange portion 30a and is located outside the first projection; wherein the heat exchange portion 30a is outside the first heat exchange channel 21, and a portion of the edge portion 30b extends into the first heat exchange channel 21; wherein the third direction Y is perpendicular to the first direction X and intersects with the second direction Z.

[0116] In one example, the end (i.e. the top end) of the heat exchange section 30a facing the first heat exchange component 20 is an open end, and the top end of the heat exchange section 30a abuts against the first heat exchange component 20 and cooperates with the first heat exchange component 20 to form an airflow channel.

[0117] In one example, the heat exchange section 30a is provided with an edge section 30b on each side along the third direction Y, and the end of each edge section 30b facing the first heat exchange assembly 20 extends into the first heat exchange channel 21.

[0118] In one example, the third direction Y is perpendicular to the first direction X and the second direction Z, respectively. For example, the third direction Y is the length direction of the battery cell 11.

[0119] There is no actual dividing line between the heat exchange part 30a and the edge part 30b. The part of the heat exchange component 30 covered by the battery cell 11 along the first direction X is the heat exchange part 30a, and the part of the heat exchange component 30 not covered by the battery cell 11 is the edge part 30b.

[0120] In one example, the portion of the edge 30b extending into the first heat exchange channel 21 includes a plurality of extensions 31, which are spaced apart along a third direction Y, so that the heat exchange medium in the first heat exchange channel 21 can flow backward through the gap between two adjacent extensions 31, thereby exchanging heat with the extensions 31.

[0121] In one example, a second heat exchange channel 32 is provided in the heat exchange section 30a and the edge section 30b respectively (see below). Figure 11 The second heat exchange channel 32, at least within the edge portion 30b, extends along the second direction Z. This shortens the coolant return path, reduces coolant return resistance, and thus increases coolant return flow rate and return velocity.

[0122] Of course, in other examples, the second heat exchange channel 32 in the heat exchange section 30a also extends along the second direction Z to shorten the path of the heated gas to the extension section 31 and accelerate the heat exchange process.

[0123] It is understandable that if the condenser section of the heat exchange section 30a extends directly into the first heat exchange channel 21, the return path of the coolant and the evaporation path of the heated and evaporating airflow are the same. The upward flow of the airflow will obstruct the return process of the coolant, thereby affecting the return of the coolant and thus affecting the heat exchange efficiency and rate.

[0124] In this embodiment, by extending a portion of the edge portion 30b into the first heat exchange channel 21, while the heat exchange portion 30a is located outside the first heat exchange channel 21, the gas evaporated by heat within the heat exchange element 30 is primarily cooled within the first heat exchange channel 21 via the edge portion 30b. The coolant, under gravity, can directly flow back through the second heat exchange channel 32 within the edge portion 30b. This not only achieves circulating heat exchange within the heat exchange element 30, but also, compared to the heat exchange portion 30a, the edge portion 30b has less airflow evaporating upwards in the second direction Z, thus minimizing the impact of the airflow on the downward flow of the coolant, effectively accelerating the heat exchange process and improving the heat exchange effect.

[0125] In one embodiment, see Figure 10 , Figure 10 This is a simplified structural diagram of a heat exchanger 30 partially extending into a first heat exchange channel 21, according to another embodiment of this application. An edge portion 30b is provided on each side of the heat exchanger portion 30a along the third direction Y; a partition plate 33 is provided inside the heat exchanger 30, extending along the second direction Z to the two side edges of the heat exchanger 30 and abutting against the first heat exchange assembly 20, thereby dividing the heat exchanger 30 into two independent regions along the third direction Y.

[0126] The partition plate 33 can be a baffle plate installed inside the heat exchanger 30.

[0127] The partition plate 33 divides the heat exchanger 30 into two independent regions, a first region and a second region, along the third direction Y. Due to the presence of the partition plate 33, gas and liquid cannot flow between the first region and the second region.

[0128] In one example, the partition plate 33 is integrally formed with the heat exchanger 30.

[0129] In this embodiment, the airflow on both sides of the partition plate 33 can flow to the corresponding edge portion 30b, which effectively improves the airflow uniformity of the two edge portions 30b, and thus effectively improves the heat exchange uniformity of the heat exchanger 30 along the third direction Y.

[0130] In one embodiment, see Figure 11 , Figure 11 Provided for an embodiment of this application Figure 9 The heat exchanger 30 shown is a cross-sectional view along the CC direction. The heat exchanger 30 has a second heat exchange channel 32, and a reinforcing structure 34 is provided inside the second heat exchange channel 32.

[0131] In one example, each of the second heat exchange channels 32 of the heat exchanger 30 is provided with a reinforcing structure 34.

[0132] In one example, the reinforcing structure 34 is integrally formed with the inner wall of the second heat exchange channel 32 to improve the support strength.

[0133] In one example, see Figure 12 , Figure 12 This is a schematic diagram showing the positions of the reinforcing structure 34 and the second heat exchange channel 32 provided in an embodiment of this application. Along the second direction Z, the reinforcing structure 34 and the heat exchanger 30 are spaced apart on one side edge toward the first heat exchange assembly 20 to form an airflow channel, so that the gas evaporated by heat in the second heat exchange channel 32 can be evaporated through the airflow channel to the extension portion 31 of the edge portion 30b.

[0134] Furthermore, along the second direction Z, the reinforcing structure 34 and the heat exchanger 30 are spaced apart on the side edge away from the first heat exchange assembly 20 to form a coolant return channel, so that the condensate returning from the edge portion 30b can return to the heat exchange portion 30a through the coolant return channel to continue to exchange heat on the battery cell 11.

[0135] Of course, in other examples, the reinforcing structure 34 may also extend along the second direction Z to at least one edge of the heat exchanger 30, and the reinforcing structure 34 is provided with a plurality of airflow holes and a plurality of liquid flow holes. Gas evaporates through the plurality of airflow holes into the extension portion 31 of the edge portion 30b, and coolant flows back to the heat exchanger 30a through the plurality of liquid flow holes.

[0136] In this embodiment, by providing a reinforcing structure 34 inside the heat exchanger 30, the support strength of the heat exchanger 30 can be increased, reducing the risk that the heat exchanger 30 will be flattened due to pressure after the battery cell 11 expands due to heat.

[0137] In one embodiment, see Figure 11 The reinforcing structure 34 includes a first reinforcing rib 341 and a second reinforcing rib 342. The second heat exchange channel 32 has a first sidewall and a second sidewall opposite to each other along the first direction X; the first reinforcing rib 341 is disposed on the first sidewall and spaced apart from the second sidewall. And / or the second reinforcing rib 342 is disposed on the second sidewall and spaced apart from the first sidewall.

[0138] In one example, the reinforcing structure 34 includes one of a first reinforcing rib 341 and a second reinforcing rib 342. In another example, the reinforcing structure 34 includes a first reinforcing rib 341 and a second reinforcing rib 342.

[0139] In one example, the first reinforcing rib 341 and the second reinforcing rib 342 extend along the second direction Z, respectively. Exemplarily, the first reinforcing rib 341 and the second reinforcing rib 342 are plate-shaped; the dimensions of the first reinforcing rib 341 and the second reinforcing rib 342 along the first direction X are greater than the dimensions along the third direction Y.

[0140] In one example, see Figure 11 The number of first reinforcing ribs 341 and second reinforcing ribs 342 are both multiple. The multiple first reinforcing ribs 341 are spaced apart along a third direction Y, and the multiple second reinforcing ribs 342 are also spaced apart along a third direction Y. The multiple first reinforcing ribs 341 and multiple second reinforcing ribs 342 are alternately distributed along a third direction Y. The third direction Y is perpendicular to the first direction X.

[0141] The density of the first reinforcing rib 341 and the second reinforcing rib 342 within the second heat exchange channel 32 can be adjusted according to the needs of the battery cell 11.

[0142] In this embodiment, by having the first reinforcing rib 341 and / or the second reinforcing rib 342 spaced apart from the sidewall of the second heat exchange channel 32 along the first direction X, the heat exchange component 30 can be adapted to the thermal expansion of the battery cell 11 while ensuring that the heat exchange component 30 has a certain supporting strength. This buffers the pressure generated by the squeezing of the battery cell 11, reduces the risk of poor contact between the battery cell 11 and the heat exchange component 30 due to the different thermal expansion coefficients between different materials, and helps to maintain good contact between the heat exchange component 30 and the battery cell 11 at all times, so as to maintain a stable heat conduction path and thus improve the heat exchange effect.

[0143] In one embodiment, see Figure 5 and Figure 6 The first heat exchange component 20 includes a ventilation plate 20a, and the first heat exchange channel 21 includes an air duct 211 formed in the ventilation plate 20a. The air duct 211 has an air inlet 22 and an air outlet 23.

[0144] The ventilation panel 20a is a hollow structure with openings at both ends. The hollow area inside the ventilation panel 20a serves as an air duct 211, and one end of the ventilation panel 20a serves as an air inlet 22; the other end of the ventilation panel 20a serves as an air outlet 23. External natural wind can enter the air duct 211 through the air inlet 22 and flow out through the air outlet 23, thus forming a circulation channel for airflow.

[0145] For example, the air inlet 22 and the air outlet 23 are arranged opposite each other along the first direction X. In this way, when the battery device 100 is applied to electrical equipment, such as a vehicle, the air inlet 22 faces the front of the vehicle, so that natural wind can enter the air duct 211 and carry away the heat on the heat exchanger 30 during the vehicle's movement.

[0146] In this embodiment, by including a ventilation plate 20a in the first heat exchange component 20 and utilizing the airflow through the air duct 211 for heat dissipation, the airflow is more concentrated and the heat dissipation effect is better compared to simple fan cooling. Furthermore, compared to liquid cooling, this solution does not require the introduction of a cold source, which helps reduce the load and cost of the heat dissipation system.

[0147] See Figures 13 to 16 , Figure 13 This is a schematic diagram of the structure of the first baffle 24 covering the air inlet 22 according to an embodiment of this application; Figure 14 This is a schematic diagram of the structure of the first baffle 24 exposing the air inlet 22 in one embodiment of this application; Figure 15 This is a schematic diagram of the structure of the second baffle 25 covering the air outlet 23 according to an embodiment of this application; Figure 16 This is a schematic diagram of the structure of the second baffle 25 exposing the air outlet 23 in an embodiment of this application.

[0148] In one embodiment, the first heat exchange assembly 20 further includes a first baffle 24 and / or a second baffle 25; the first baffle 24 is movably connected to the air inlet 22, and the first baffle 24 covers or exposes the air inlet 22 under the action of an external force. The second baffle 25 is movably connected to the air outlet 23, and the second baffle 25 covers or exposes the air outlet 23 under the action of an external force.

[0149] The "movable connection" involved in this application includes, but is not limited to, hinge connection and pin connection. The first baffle 24 covering the air inlet 22 means that the first baffle 24 completely covers the air inlet 22, preventing external natural wind or dust and impurities from entering the air duct 211, or allowing only a small amount to enter. The first baffle 24 exposing the air inlet 22 can mean that the first baffle 24 completely exposes the air inlet 22, or exposes only a portion of the air inlet 22.

[0150] In one example, the first baffle 24 has a first end and a second end opposite to each other. The first end of the first baffle 24 is movably connected to the air inlet 22, and the second end of the first baffle 24 is a free end. When the external force (such as wind force) applied to the first baffle 24 is greater than a first threshold, the second end of the first baffle 24 rotates relative to the first end to expose the air inlet 22. When the external force applied to the first baffle 24 is less than or equal to the first threshold, the first baffle 24 covers the air inlet 22.

[0151] For example, the first end of the first baffle 24 is movably connected to the side of the air inlet 22 away from the battery assembly 10 along the second direction Z. Thus, when the first baffle 24 is exposed to the air inlet 22 and the pressure on the first baffle 24 is less than or equal to a first threshold, the first baffle 24 can automatically return to the state of covering the air inlet 22 under the action of gravity.

[0152] In one example, when the first baffle 24 covers the air inlet 22, the first baffle 24 is set vertically downward along the second direction Z. During the process of the first baffle 24 exposing the air inlet 22, the first baffle 24 rotates toward the air duct 211.

[0153] In one example, combined Figure 13 and Figure 14 The first heat exchange component 20 also includes a limiting block 29, which is located on the side of the air inlet 22 away from the air duct 211 and is provided at the second end of the first baffle 24 to prevent the first baffle 24 from continuing to rotate in the direction away from the air duct 211 after covering the air inlet 22.

[0154] In one example, the first baffle 24 is a one-way opening louver or flap structure.

[0155] The second baffle 25 covering the air outlet 23 means that the second baffle 25 completely covers the air outlet 23, preventing airflow from the air duct 211 from flowing out through the air outlet 23, or allowing only a small amount of airflow to flow out; external natural wind or dust also cannot enter the air duct 211, or only a small amount can enter. The second baffle 25 exposing the air outlet 23 can mean that the second baffle 25 exposes the entire air outlet 23, or exposes only a portion of the air outlet 23.

[0156] In one example, the second baffle 25 has a first end and a second end opposite to each other. The first end of the second baffle 25 is movably connected to the air outlet 23, and the second end of the second baffle 25 is a free end. When the pressure (such as wind force) on the second baffle 25 is greater than a second threshold, the second end of the second baffle 25 rotates relative to the first end to expose the air outlet 23. When the pressure on the second baffle 25 is less than or equal to the second threshold, the second baffle 25 covers the air outlet 23.

[0157] For example, the first end of the second baffle 25 is movably connected to the side of the air outlet 23 away from the battery assembly 10 along the second direction Z. Thus, when the second baffle 25 exposes the air outlet 23 and the pressure on the second baffle 25 is less than or equal to the second threshold, the second baffle 25 can automatically return to the state of covering the air outlet 23 under the action of gravity.

[0158] The first threshold and the second threshold can be the same; or the first threshold can be greater than the second threshold. The specific values ​​of the first threshold and the second threshold can be selected and set according to the actual situation, as long as it ensures that the first baffle 24 can expose the air inlet 22 and the second baffle 25 can expose the air outlet 23 at a certain vehicle speed, so that natural wind can circulate in the air duct 211.

[0159] In one example, when the second baffle 25 covers the air outlet 23, the second baffle 25 is set vertically downward along the second direction Z. During the process of the second baffle 25 exposing the air outlet 23, the second baffle 25 rotates in the direction away from the air duct 211.

[0160] For example, the first baffle 24 is held in a state of covering the air inlet 22 by a spring or magnetic force; and / or the second baffle 25 is held in a state of covering the air outlet 23 by a spring or magnetic force.

[0161] In this embodiment, by setting a first baffle 24 at the air inlet 22 and making the first baffle 24 able to cover the air inlet 22 under external force, the sealing performance of the air duct 211 is improved, reducing the risk of external dust, impurities, etc. entering the air duct 211 and clogging the heat exchange interface of the heat exchanger 30, thus affecting heat exchange. At the same time, by making the first baffle 24 able to expose the air inlet 22 under external force, when the wind pressure is high (such as when the vehicle speed is greater than 40 km / h), the oncoming wind on the first baffle 24 overcomes the holding force of the first baffle 24, blows open the first baffle 24 and exposes the air inlet 22, thereby allowing natural wind to enter the air duct 211 and flow over the surface of the heat exchanger 30 inside the air duct 211, carrying away the heat of the heat exchanger 30 and expelling it from the air outlet 23, thereby using natural wind to cool the heat exchanger 30. Compared with the battery device 100 always using the fan 90 for heat dissipation, this solution can reduce noise and energy consumption.

[0162] Furthermore, by installing a second baffle 25 at the air outlet 23, and ensuring that the second baffle 25 can cover the air outlet 23 under external force, the sealing performance inside the air duct 211 is improved, reducing the risk of external dust and impurities entering the air duct 211 and clogging the heat exchange interface of the heat exchanger 30, thus affecting heat exchange. Simultaneously, by allowing the second baffle 25 to be exposed at the air outlet 23 under external force, forming an airflow channel, airflow is discharged from the air outlet 23, thereby cooling the heat exchanger 30 within the air duct 211.

[0163] In one embodiment, the battery device 100 further includes a sensing component (not shown) and a controller (not shown). The sensing component is configured to sense the air pressure at the air inlet 22 and the temperature of the battery assembly 10. The controller is electrically connected to the sensing component and is configured to, when the air pressure at the air inlet 22 is less than or equal to a first threshold and the temperature of the battery assembly 10 is greater than a first preset temperature, control the first baffle 24 to expose the air inlet 22 and control the second baffle 25 to expose the air outlet 23.

[0164] In one example, the sensing components include a wind pressure sensor and a temperature sensor. The wind pressure sensor is located at the air inlet 22 to sense the wind pressure at the air inlet 22. The temperature sensor is located at the battery assembly 10 to sense the temperature of the battery assembly 10. The controller is electrically connected to the wind pressure sensor and the temperature sensor respectively, and is configured to control the first baffle 24 to expose the air inlet 22 and the second baffle 25 to expose the air outlet 23 when the wind pressure at the air inlet 22 is less than or equal to a first threshold and the temperature of the battery assembly 10 is greater than a first preset temperature.

[0165] In another example, unlike the example above, an anemometer can be used to detect the wind speed at the air inlet 22, and the controller calculates the wind pressure based on the formula for wind speed and wind pressure.

[0166] Of course, in other examples, the sensing component may also sense the temperature of the battery assembly 10 solely through a temperature sensor. The controller is configured to, when the temperature of the battery assembly 10 is greater than a first preset temperature, control the first baffle 24 to expose the air inlet 22 and control the second baffle 25 to expose the air outlet 23.

[0167] It is understandable that the greater the wind speed, the greater the wind pressure, and the greater the wind force. When this battery device 100 is used in a vehicle, the greater the vehicle speed, the greater the wind speed.

[0168] In this embodiment, when the wind pressure is low but the temperature of the battery assembly 10 is high and heat dissipation is required, the controller can forcibly open the first baffle 24 and the second baffle 25 to form an airflow channel, thereby utilizing the natural wind to dissipate heat from the heat exchanger 30 and achieve a cooling effect on the battery assembly 10.

[0169] In one embodiment, see Figure 17 , Figure 17 The first heat exchange component 20 provided in an embodiment of this application is shown in a vertical cross-sectional view along the third direction Y. The first heat exchange component 20 includes an inner layer structure 201 and an outer layer structure 202. The inner layer structure 201 is an elastic structure, and the elastic structure surrounds and forms a first heat exchange channel 21. The outer layer structure 202 is disposed outside the inner layer structure 201 and wraps around the entire inner layer structure 201.

[0170] The inner structure 201 is used to contact the heat exchanger 30 to form a sealed interface. The outer structure 202 is used to provide mechanical strength for the entire first heat exchange assembly 20 and to position the heat exchanger 30 during installation.

[0171] In one example, the elastic structure can be rubber or a thermoplastic elastomer. For example, the rubber can be ethylene propylene diene monomer (EPDM); the thermoplastic elastomer can be a thermoplastic styrene block copolymer (TPE), which comes into contact with the heat exchanger 30 to form a sealed interface.

[0172] The outer layer structure 202 can be an insulating structural plastic. For example, the material of the outer layer structure 202 can be glass fiber reinforced polypropylene or glass fiber reinforced polyamide 12.

[0173] In one example, the first heat exchange component 20 is formed in one piece using two-color injection molding.

[0174] In this embodiment, the inner layer structure of the first heat exchange component 20 adopts an elastic structure, which can increase the sealing reliability between the first heat exchange channel 21 and the heat exchange element 30, eliminate the need for a secondary assembly and sealing process between the first heat exchange channel 21 and the heat exchange element 30, improve the airtightness of the first heat exchange channel 21, and facilitate the reduction of the wall thickness of the first heat exchange component 20. The outer layer structure adopts a plastic structure, which can improve the mechanical strength of the first heat exchange component 20 and facilitate the installation and positioning between the heat exchange element 30 and the first heat exchange component 20; moreover, compared with metal structures, plastic structures are less expensive and suitable for long-term use.

[0175] See Figures 18 to 20 , Figure 18 This is a schematic diagram of the internal structure of the first heat exchange channel 21 provided in an embodiment of this application; Figure 19 for Figure 18 Enlarged view of point B in the structure shown; Figure 20 This is a schematic diagram of the structure of a flow divider 70 provided in an embodiment of the present application, which is disposed in the first heat exchange channel 21.

[0176] In one embodiment, the battery device 100 further includes a flow divider 70, which is disposed within the first heat exchange channel 21 and is located on the side of the heat exchange member 30 facing the inlet of the first heat exchange channel 21; the flow divider 70 has a plurality of flow divider holes 71 along a third direction Y, and the aperture of the plurality of flow divider holes 71 gradually increases in the direction away from the inlet; wherein, the third direction Y intersects with the first direction X.

[0177] In one example, the third direction Y is perpendicular to the first direction X.

[0178] In one example, the flow divider 70 is installed inside the air duct 211. The flow divider 70 is installed in the air duct 211 near the air inlet 22 so that the natural air entering from the air inlet 22 is directly diverted by the flow divider 70.

[0179] In one example, there are two flow dividers 70, which are arranged adjacent to each other along the third direction Y. For example, the two flow dividers 70 have the same length along the third direction Y and extend to both sides of the air duct 211 along the third direction Y.

[0180] In one example, the diversion hole 71 extends along a third direction Y to increase the contact area between the extension 31 at the corresponding location and the airflow, thereby improving heat dissipation efficiency. Exemplarily, the diversion hole 71 is an elliptical hole.

[0181] In one example, the centerline of the flow divider 70 along the third direction Y serves as the dividing line, and multiple flow dividers 71 gradually increase in size along the third direction Y in a direction away from the centerline. Exemplarily, the flow dividers 71 on both sides of the centerline are axially symmetrical about the centerline.

[0182] In this embodiment, the flow rate of the heat exchange medium (such as air flow) at various positions along the third direction Y in the first heat exchange channel 21 can be adjusted by the flow divider 70 so that the flow rate of the heat exchange medium (such as air flow) at various positions along the third direction Y in the first heat exchange channel 21 is basically the same, thereby improving the heat dissipation uniformity, which is beneficial to uniformly measure the temperature of the battery assembly 10 at various positions along the third direction Y, and improve the temperature consistency of each battery cell 11.

[0183] In one embodiment, see Figure 21 , Figure 21 This is a schematic diagram of the structure of a heat exchanger 30 extending into a first heat exchange channel 21 according to an embodiment of the present application; the portion of the heat exchanger 30 extending into the first heat exchange channel 21 includes at least one extension portion 31; the extension portion 31 has a comb-like structure.

[0184] In one example, the portion of the heat exchanger 30 extending into the first heat exchange channel 21 includes a plurality of extensions 31, which are spaced apart along a third direction Y. Exemplarily, each extension 31 is a comb-tooth structure. Alternatively, some of the extensions 31 may be comb-tooth structures.

[0185] A comb-like structure is a structure with multiple teeth on its surface.

[0186] In one example, each comb structure includes multiple fins spaced apart along a third direction Y. To facilitate airflow over adjacent fins for heat dissipation, each fin may extend along a first direction X.

[0187] Of course, in other examples, each comb structure can also include multiple serrated structures, as long as the heat exchange area can be increased.

[0188] In this embodiment, by making the extension portion 31 a comb-tooth structure, compared to a plate-shaped structure where the extension portion 31 is an integral piece, the comb-tooth structure has a larger contact area with the airflow, which can increase the heat exchange area of ​​the extension portion 31, enhance heat exchange, and improve heat exchange efficiency.

[0189] In one embodiment, see Figure 18 and Figure 19 The second heat exchange assembly includes multiple heat exchange elements 30, which are arranged sequentially along the first direction X; the extension portions 31 on two adjacent heat exchange elements 30 are staggered along the first direction X.

[0190] Wherein, the staggered arrangement of the extensions 31 on two adjacent heat exchangers 30 along the first direction X means that the extensions 31 on two adjacent heat exchangers 30 are completely or partially staggered in the first direction X and are not aligned on the same horizontal line.

[0191] In this embodiment, by arranging the extension portions 31 on two adjacent heat exchangers 30 in an alternating manner along the first direction X, the heat exchange medium in the first heat exchange channel 21 can better carry away the heat on the downstream heat exchanger 30 along the flow path of the heat exchange medium, thereby improving heat dissipation efficiency and uniformity, which is beneficial to the uniform heat exchange of the front and rear battery cells 11.

[0192] In one embodiment, see Figure 18 and Figure 19 Multiple guide plates 26 are provided in the first heat exchange channel 21 at the position corresponding to the heat exchange element 30. The multiple guide plates 26 are spaced apart along the third direction Y, and a ventilation hole is defined between each two adjacent guide plates 26. The extension part 31 extends into the ventilation hole of the first heat exchange channel 21.

[0193] In one example, a row of guide vanes 26 is provided in the first heat exchange channel 21 corresponding to the positions of each heat exchange element 30, and each row of guide vanes 26 includes multiple guide vanes 26 spaced apart along the third direction Y.

[0194] In one example, from the air inlet 22 towards the air outlet 23, the number of guide vanes 26 corresponding to each row of heat exchangers 30 gradually increases; that is, the further away from the air inlet 22, the more guide vanes 26 corresponding to the heat exchangers 30. In this way, the airflow rate in the rear ventilation holes can be increased, and the heat dissipation uniformity of each row of heat exchangers 30 can be improved.

[0195] For example, the deflector 26 extends along a third direction Y and is elongated.

[0196] In one example, the guide plate 26 extends along the thickness direction (i.e., the Z direction) of the first heat exchange component 20 to the upper and lower surfaces of the first heat exchange channel 21, so that the airflow can only flow downstream through the ventilation holes at the corresponding locations.

[0197] The specific dimensions of the ventilation holes along the third direction Y can be selected and set according to the actual situation.

[0198] In this embodiment, by setting a guide plate 26 in the first heat exchange channel 21 and defining a ventilation hole by the guide plate 26, on the one hand, the air flow can be guided by the guide plate 26 so that the air flow in the first heat exchange channel 21 flows to the ventilation hole to dissipate heat to the extension 31 in the ventilation hole; on the other hand, while increasing the heat exchange area, the air flow can flow normally towards the air outlet 23 along the first direction X.

[0199] In one embodiment, see Figure 1 The battery device 100 also includes a fan 90, which is connected to the air duct 211 and configured to drive an airflow within the air duct 211.

[0200] In one example, the fan 90 is connected to the air duct 211 near the air inlet 22 and supplies air into the air duct 211 during operation to exchange heat with the extension portion 31. In this example, the fan 90 may be located on the side of the ventilation plate 20a away from the battery assembly 10, at the end of the side where the air inlet 22 of the ventilation plate 20a is located. Of course, in other examples, the fan 90 may also be located at the end of the side where the air outlet 23 of the ventilation plate 20a is located, or at the middle of the ventilation plate 20a along the first direction X.

[0201] For example, the fan 90 and the duct 211 are connected at the center of the third direction Y, and two splitter plates 70 are located on both sides of the connection between the fan 90 and the duct 211.

[0202] In another example, the fan 90 can also be connected to the air outlet 23 of the air duct 211 and draw air during operation so that the airflow of the air duct 211 passes over the surface of the heat exchanger 30 to dissipate heat.

[0203] For example, the fan 90 is axial or centrifugal, with a rated voltage of 12V or 24V.

[0204] In this embodiment, by adding a fan 90, when the wind pressure applied by the external natural wind to the first baffle 24 is low, the fan 90 can actively deliver air to cool the extension portion 31. When the wind pressure applied by the external natural wind to the first baffle 24 is high, natural wind can be used instead of the fan 90 to cool the extension portion 31. The fan 90 only operates for short periods when necessary. Compared to a solution that always uses the fan 90 for heat dissipation, this solution can reduce the overall energy consumption of the battery device 100 and save 60% to 80% of the fan 90's energy consumption; it can also reduce noise. Of course, when the wind pressure applied by the external natural wind to the first baffle 24 is high, the natural wind and the fan 90 can work together to cool the extension portion 31, which can greatly improve the heat dissipation efficiency.

[0205] In one embodiment, the battery device 100 further includes a sensing component (not shown) and a controller (not shown). The sensing component is configured to sense the air pressure at the air inlet 22 and the temperature of the battery component 10. The controller is electrically connected to the sensing component and the fan 90, respectively. The controller is configured to control the fan 90 to start operating when the air pressure is less than or equal to a first threshold and the temperature of the battery component 10 is greater than a first preset temperature.

[0206] In one example, the sensing component involved in this embodiment is the same as the sensing component involved in the above embodiments; the controller involved in this embodiment is the same as the controller involved in the above embodiments.

[0207] In one example, in response to the start of operation of the fan 90, the controller can control the first baffle 24 to cover the air inlet 22 and the second baffle 25 to cover the air outlet 23, thereby reducing the probability of dust and impurities entering the air duct 211. Alternatively, in response to the start of operation of the fan 90, the controller can control the first baffle 24 to cover the air inlet 22 and control the second baffle 25 to expose the air outlet 23, thereby reducing the probability of dust and impurities entering the air duct 211 while simultaneously creating an airflow channel between the air duct 211 and the air outlet 23. This facilitates the airflow within the air duct 211 to exit through the air outlet 23, thereby improving heat exchange with the extension portion 31.

[0208] Of course, when the fan 90 starts working, the controller can also control the first baffle 24 to expose the air inlet 22 and the second baffle 25 to expose the air outlet 23, so as to further utilize natural wind for heat dissipation while using the fan 90 for heat exchange, thereby improving heat dissipation efficiency and reducing energy consumption.

[0209] In this embodiment, when the external wind pressure is low enough to open the first baffle 24 and allow natural wind to enter the air duct 211, but the battery assembly 10 is hot, the fan 90 can actively deliver air to cool the extension portion 31, which is beneficial for the rapid removal of heat from the battery cell 11. Simultaneously, the fan 90 operates only when the wind pressure is low and stops operating when the wind pressure is high, effectively reducing energy consumption and fan noise. Furthermore, this solution can automatically control the start and stop of the fan 90, resulting in a high degree of automation.

[0210] In one embodiment, the controller is configured to: control the fan 90 to start operating at a first power when the wind pressure is less than or equal to a first threshold and the temperature of the battery component 10 is greater than a first preset temperature and less than a second preset temperature; and control the fan 90 to start operating at a second power when the wind pressure is less than or equal to the first threshold and the temperature of the battery component 10 is greater than the second preset temperature; wherein the first power is less than the second power.

[0211] It should be noted that the wind pressure mentioned in this application refers to the wind pressure of the outside natural wind.

[0212] For example, the first preset temperature can be 35°C, and the second preset temperature can be 45°C. The specific values ​​of the first power, the second power, the first preset temperature, and the second preset temperature can be set according to the actual situation.

[0213] In one example, when the wind pressure exceeds a first threshold and the temperature of the battery assembly 10 is greater than a first preset temperature but less than a second preset temperature, the first baffle 24 exposes the air inlet 22, and the second baffle 25 exposes the air outlet 23, allowing for heat dissipation through natural wind. At this time, the fan 90 can be in standby mode. Alternatively, the fan 90 can operate at a third power; the third power is less than the second power, and the third power can be less than or equal to the first power. This accelerates heat dissipation while minimizing the operating noise of the fan 90.

[0214] When the wind pressure is greater than the first threshold and the temperature of the battery assembly 10 is greater than the second preset temperature, the controller can also control the fan 90 to start operating at the fourth power, which can be less than the third power and greater than the first power.

[0215] In some examples, when the temperature of the battery assembly 10 is less than or equal to a first preset temperature and the duration is not less than a time threshold, the controller controls the fan 90 to stop operating, and controls the first baffle 24 to cover the air inlet 22, and controls the second baffle 25 to cover the air outlet 23. The time threshold can be set, for example, the time threshold can be 1 minute, 2 minutes, 5 minutes, etc.

[0216] In this embodiment, when the wind pressure is high, natural wind completely replaces the fan 90, which can cool the extension part 31 and reduce noise other than wind noise. When natural wind is insufficient to dissipate the heat of the battery assembly 10 in time, the fan 90 can be controlled to start operating at a certain power according to the wind pressure and the temperature of the battery assembly 10. In this way, the extension part 31 can be cooled by the fan 90, and the operating power of the fan 90 is controllable, which can reduce the noise of the fan 90 to a certain extent. The noise level is controllable, and energy consumption is reduced.

[0217] In one embodiment, see Figure 19 The battery device 100 also includes a heating structure 27 and / or a dust filter 28. The heating structure 27 is disposed within the air duct 211 and located along the first direction X near the air inlet 22 of the air duct 211, and is configured to heat the airflow within the air duct 211. The dust filter 28 is disposed within the air duct 211 and located along the first direction X near the air inlet 22 of the air duct 211. In one example, the battery device 100 includes a heating structure 27 and a dustproof net 28. The heating structure 27 can be a heating wire or a heating net; it heats the air flowing through the air duct 211 while ensuring that the air entering the air duct 211 can flow through the heating structure 27, and then heats the extension part 31 with the hot air.

[0218] A dust filter 28 can be installed on the side of the heating structure 27 facing the air inlet 22 to filter large particles of dust and impurities, thereby reducing the risk of dust and impurities entering the air duct 211 and clogging the heating structure 27. Dust and impurities entering the air duct 211 can also be blown out of the air duct 211 when the air pressure is high.

[0219] In another example, the battery device 100 includes one of a heating structure 27 and a dustproof mesh 28.

[0220] In this embodiment, the air entering the air duct 211 can be heated by the heating structure 27 to heat the battery cell 11. And / or, the dustproof net 28 reduces the entry of dust and impurities, thereby reducing the risk of dust and impurities entering the air duct 211 and clogging the heat exchange interface of the heating structure 27 and the heat exchange element 30, thus affecting heat exchange.

[0221] 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: A battery assembly, comprising a plurality of battery cells arranged sequentially along a first direction; A first heat exchange component has a first heat exchange channel and is disposed on one side of the battery component along a second direction, wherein the first direction intersects the second direction; The second heat exchange assembly includes a heat exchange element disposed between at least two of the battery cells, and a portion of the heat exchange element extends into the first heat exchange channel.

2. The battery device according to claim 1, characterized in that, The heat exchanger includes: Heat exchange section; the orthographic projection of the battery cell onto the heat exchanger along the first direction is the first projection, and the first projection coincides with the heat exchange section; a portion of the heat exchange section extends into the first heat exchange channel.

3. The battery device according to claim 1, characterized in that, The heat exchanger includes: Heat exchange section; the orthographic projection of the battery cell onto the heat exchanger along the first direction is the first projection, and the first projection coincides with the heat exchange section; An edge portion is disposed on at least one side of the heat exchange portion along a third direction and located outside the first projection; wherein the heat exchange portion is outside the first heat exchange channel, and a portion of the edge portion extends into the first heat exchange channel; wherein the third direction is perpendicular to the first direction and intersects with the second direction.

4. The battery device according to claim 3, characterized in that, The heat exchange section is provided with an edge portion on each of its two sides along the third direction; The heat exchanger is provided with a partition plate that extends along the second direction to both sides of the heat exchanger and abuts against the first heat exchange component, thereby dividing the heat exchanger into two independent regions along the third direction.

5. The battery device according to claim 3, characterized in that, The heat exchanger has a second heat exchange channel, and a reinforcing structure is provided inside the second heat exchange channel.

6. The battery device according to claim 5, characterized in that, The reinforcing structure includes: A first reinforcing rib; the second heat exchange channel has opposing first and second sidewalls along the first direction; the first reinforcing rib is disposed on the first sidewall and spaced apart from the second sidewall; and / or The second reinforcing rib is disposed on the second side wall and spaced apart from the first side wall.

7. The battery device according to any one of claims 1-6, characterized in that, The first heat exchange component includes a ventilation plate; The first heat exchange channel includes an air duct formed within the ventilation plate, the air duct having an air inlet and an air outlet.

8. The battery device according to claim 7, characterized in that, The first heat exchange component also includes: A first baffle is movably connected to the air inlet, and the first baffle may cover or expose the air inlet under the action of external force; and / or The second baffle is movably connected to the air outlet, and the second baffle can cover or expose the air outlet under the action of external force.

9. The battery device according to any one of claims 1-6, characterized in that, The first heat exchange component includes: An inner layer structure, wherein the inner layer structure is an elastic structure, and the elastic structure surrounds and forms the first heat exchange channel; The outer layer structure is located outside the inner layer structure and encloses the entire inner layer structure.

10. The battery device according to any one of claims 1-6, characterized in that, Also includes: A flow divider is disposed within the first heat exchange channel and is located on the side of the heat exchanger facing the inlet of the first heat exchange channel; the flow divider has a plurality of flow divider holes along a third direction, and the diameter of the plurality of flow divider holes gradually increases along the direction away from the inlet; wherein, the third direction intersects with the first direction.

11. The battery device according to any one of claims 1-6, characterized in that, The portion of the heat exchanger extending into the first heat exchange channel includes at least one extension portion; the extension portion has a comb-like structure.

12. The battery device according to claim 11, characterized in that, The second heat exchange assembly includes a plurality of heat exchange elements, which are arranged sequentially along the first direction; the extension portions on two adjacent heat exchange elements are staggered along the first direction.

13. The battery device according to claim 7, characterized in that, Also includes: A fan, connected to the duct, is configured to drive an airflow within the duct.

14. The battery device according to claim 13, characterized in that, Also includes: The sensing component is configured to sense the air pressure at the air inlet and the temperature of the battery assembly; The controller is electrically connected to both the sensing component and the fan. The controller is configured to start the fan when the wind pressure is less than or equal to a first threshold and the temperature of the battery assembly is greater than a first preset temperature.

15. The battery device according to claim 14, characterized in that, The controller is configured to: When the wind pressure is less than or equal to the first threshold, and the temperature of the battery assembly is greater than the first preset temperature and less than the second preset temperature, the fan is controlled to start operating at the first power. When the wind pressure is less than or equal to the first threshold and the temperature of the battery assembly is greater than the second preset temperature, the fan is controlled to start operating at a second power; wherein the first power is less than the second power.

16. The battery device according to claim 7, characterized in that, Also includes: A heating structure is disposed within the air duct and located along the first direction near the air inlet of the air duct, and is configured to heat the airflow within the air duct; and / or A dustproof net is installed inside the air duct and is located along the first direction near the air inlet of the air duct.

17. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-16.

18. An energy storage device, characterized in that, Includes the battery device as described in any one of claims 1-16.

19. An energy storage system, characterized in that, It includes a power conversion device and an energy storage device as described in claim 18, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

20. A charging network, characterized in that, It includes a charging pile and an energy storage device as described in claim 18, the energy storage device being used to provide electrical energy to the charging pile.

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