Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and the battery device comprises a box body assembly, the interior of the box body assembly is provided with a containing space, and the box body assembly is provided with a plurality of air inlet holes and air outlet holes which are communicated with the containing space; wherein the air inlet hole is provided with a first axial direction pointing to the box body assembly from outside to inside, and in the first axial direction, the area defined by the section contour, perpendicular to the first axial direction, of the air inlet hole is gradually reduced; the air outlet hole is provided with a second axial direction pointing to the box body assembly from inside to outside, and along the second axial direction, the area enclosed by the section contour of the air outlet hole vertical to the second axial direction is gradually reduced; and the battery monomer assembly is arranged in the accommodating space and comprises one or more battery monomers. The air inlet holes and the air outlet holes of the box body assembly are designed to be reducing holes, so that the overall heat exchange efficiency of the battery device can be improved, and the reliability of the battery device is improved.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, batteries, as the power source, play an irreplaceable and crucial role. A battery consists of a casing and multiple individual battery cells housed within it. As a core component of new energy vehicles, batteries have high requirements in terms of both safety and lifespan. However, the individual battery cells generate a significant amount of heat during continuous charging and discharging, causing a sharp rise in the internal temperature of the battery and severely impacting its reliability. Therefore, improving the heat dissipation performance of batteries to enhance their reliability has become an urgent problem to be solved. Utility Model Content

[0003] This application provides a battery device and an electrical device that can effectively improve the heat dissipation performance of the battery device, thereby effectively improving the reliability of the battery device and the electrical device.

[0004] In a first aspect, embodiments of this application provide a battery device, comprising: a housing assembly, the housing assembly having an internal accommodating space, and the housing assembly having a plurality of air inlets and air outlets communicating with the accommodating space; wherein, the air inlets have a first axial direction pointing from the outside to the inside of the housing assembly, and along the first axial direction, the area enclosed by the cross-sectional profile of the air inlets perpendicular to the first axial direction gradually decreases; the air outlets have a second axial direction pointing from the inside to the outside of the housing assembly, and along the second axial direction, the area enclosed by the cross-sectional profile of the air outlet perpendicular to the second axial direction gradually decreases; and a battery cell assembly disposed within the accommodating space, and comprising one or more battery cells.

[0005] In the above technical solution, both the air inlet and outlet of the housing component are designed with tapered holes. As airflow passes through the inlet and outlet, the cross-sectional area gradually decreases, resulting in a gradual increase in airflow velocity. When airflow enters the housing space from the inlet, the inflow velocity increases, which helps to increase airflow turbulence within the housing space. This increases the mixing between the higher-temperature air inside the housing space and the incoming lower-temperature airflow, leading to more efficient heat exchange within the housing space. When airflow exits from the outlet, the outflow velocity increases, accelerating the discharge of the higher-temperature airflow after heat exchange, thus more efficiently removing heat. Therefore, adopting this solution can improve the overall heat exchange efficiency of the battery device, resulting in better heat dissipation and cooling effects, and contributing to improved reliability of the battery device.

[0006] In some embodiments of this application, the housing assembly includes a first housing wall and a second housing wall, the first housing wall having an array of air inlets and the second housing wall having an array of air outlets.

[0007] In the above technical solution, by placing the air inlet and outlet on different housing walls, the risk of airflow short-circuiting can be reduced, allowing the airflow to flow orderly within the containment space. The lower-temperature airflow, entering through the air inlet, can pass more evenly through components such as battery cells and modules, fully absorbing heat before being discharged through the air outlet, thus improving heat exchange efficiency. Arranging the air inlets in an array on the first housing wall and the air outlets in an array on the second housing wall increases the number of air inlets and outlets, which in turn increases the airflow volume, improves heat exchange efficiency, and enhances the reliability of the battery device.

[0008] In some embodiments of this application, the air inlets of any two adjacent rows on the first box wall are staggered, and the air outlets of any two adjacent rows on the second box wall are staggered.

[0009] In the above technical solution, the staggered arrangement of any two adjacent rows of air inlets on the first casing wall allows for more dispersed and uniform airflow into the containment space. This facilitates thorough mixing and heat exchange between the low-temperature airflow and the higher-temperature air within the containment space, thereby improving heat exchange efficiency. Similarly, the staggered arrangement of any two adjacent rows of air outlets on the second casing wall increases the airflow exit path, reduces the risk of localized turbulence during airflow discharge, and allows for more efficient airflow discharge, further enhancing heat exchange efficiency. This arrangement of air inlets and outlets enables the battery device to achieve higher heat exchange efficiency, thereby improving its reliability.

[0010] In some embodiments of this application, the first box wall and the second box wall are arranged adjacent to and / or opposite to each other.

[0011] In the above technical solution, by setting the first and second enclosure walls adjacent to and / or opposite to each other, the airflow path inside the enclosure assembly can be flexibly adjusted. Due to the different grouping or arrangement of battery cells within the containment space, the heat dissipation boundaries around the enclosure assembly will be different. The temperature of battery cells near the enclosure wall with poor heat dissipation boundary is higher, while the temperature of battery cells near the enclosure wall with good heat dissipation boundary is lower. Therefore, the setting positions of the first and second enclosure walls can be adjusted according to the overall heat dissipation boundary of the battery device, thereby improving the overall heat dissipation and cooling effect of the battery device, enabling the battery cell assembly to be at a suitable operating temperature, and thus improving the reliability of the battery device.

[0012] In some embodiments of this application, the first and last two rows and / or two columns of air inlets of the first box wall are arranged close to the edge of the first box wall; the first and last two rows and / or two columns of air inlets of the second box wall are arranged close to the edge of the second box wall.

[0013] In the above technical solution, the air inlet arrangement increases the total airflow cross-section of all air inlets in the first housing, increasing the airflow volume. This facilitates providing more low-temperature airflow and accommodating heat exchange within the space, thus improving heat exchange efficiency. Similarly, the air outlet arrangement increases the total airflow cross-section of all air outlets in the second housing wall, increasing the airflow volume. This facilitates the rapid discharge of the higher-temperature airflow after heat exchange, further improving heat exchange efficiency. This solution further enhances the overall heat exchange efficiency of the battery device, thereby improving its reliability.

[0014] In some embodiments of this application, the battery device includes an air supply component disposed on the housing assembly for driving airflow from the air inlet into the receiving space.

[0015] In the above technical solution, the air supply component can drive the low-temperature airflow from the external environment into the containment space through the air inlet and drive the heat-exchanged airflow out through the air outlet. Thus, the air supply component can provide the driving force to drive the airflow, and the rapid airflow in and out of the containment space is conducive to improving the heat exchange efficiency, thereby providing a suitable working environment for the inside of the battery device and improving the reliability of the battery device.

[0016] In some embodiments of this application, the air supply component is disposed on or near the second housing wall to drive the airflow out of the receiving space through the air outlet.

[0017] In the above technical solution, the air supply component can dissipate heat by drawing air from the containment space, which optimizes airflow. A negative pressure can be created inside the containment space, allowing external airflow to flow naturally into it. This results in a more even distribution of airflow throughout the space, reducing localized areas of excessively strong or weak airflow, improving heat dissipation uniformity, and minimizing airflow short-circuiting. New, low-temperature airflow can flow into the containment space from all directions, facilitating thorough contact between the low-temperature airflow and the existing gas. Furthermore, the rapid extraction of airflow improves heat dissipation efficiency and enhances the reliability of the battery device. Because this solution extracts air from the containment space, dust, moisture, and other impurities from the external environment are less likely to enter the enclosure, ensuring internal cleanliness. The rapid extraction also reduces the risk of fire within the enclosure, further improving the reliability of the battery device.

[0018] In some embodiments of this application, the air supply component is disposed on or near the first housing wall to drive airflow through the air inlet into the accommodating space.

[0019] In the above technical solution, the air supply component dissipates heat by supplying air into the containment space. It can directly blow low-temperature airflow onto battery cells and other components. This forced convection method quickly removes the heat generated inside the battery device during operation, facilitating rapid cooling. Furthermore, it is less restricted by external environmental factors such as temperature and air pressure, providing a continuous and stable low-temperature airflow, improving heat exchange reliability, and consequently enhancing the reliability of the battery device. The air supply component also creates positive pressure within the containment space by blowing air into it. Installing a filter at the location of the air supply component or air inlet reduces the risk of dust, debris, or moisture entering the containment space, helping to maintain its cleanliness, reducing the probability of short circuits in battery cells, and further improving the reliability of the battery device.

[0020] In some embodiments of this application, the air supply component is located on the outside of the housing assembly. This technical solution saves internal space by placing the air supply component on the outside of the housing assembly, facilitating the arrangement of larger or more numerous battery cells, increasing the energy density of the battery device. Furthermore, placing the air supply component on the outside also facilitates inspection and maintenance, reducing maintenance costs.

[0021] In some embodiments of this application, the housing assembly includes a housing and a cover plate. The housing has an opening, and the cover plate covers the opening and together with the housing defines an accommodating space. A first housing wall and a second housing wall are disposed on the housing.

[0022] In the above technical solution, by placing the first and second enclosure walls on the enclosure body—that is, by placing the air inlet and outlet on the enclosure body—the enclosure body's structure is more stable and stronger than the cover plate, making it less prone to deformation. This improves the reliability of the air inlet and outlet, enhancing ventilation performance and the overall reliability of the battery device. Since the cover plate is typically located at the top of the enclosure body, while the side and bottom walls are less prone to dust accumulation, placing the air inlet and outlet on the enclosure body also reduces the risk of dust, moisture, and other impurities accumulating and intruding. This facilitates more stable heat dissipation and operation of the battery device, further improving its reliability.

[0023] In some embodiments of this application, the battery device includes an electronic control component disposed within a housing space and electrically connected to the individual battery cells, with the electronic control component located close to the first housing wall. In this technical solution, since the first housing wall is provided with air inlets, and the electronic control component is close to the first housing wall, the low-temperature airflow from the outside can promptly cool and dissipate heat from the electronic control component when it enters the air inlets. This helps the electronic control component maintain a stable operating state, thereby more stably managing or controlling the individual battery cells and improving the overall reliability of the battery device.

[0024] In some embodiments of this application, the battery device includes an electronic control component disposed within a housing space and electrically connected to a battery cell, wherein airflow passages for airflow are defined between the housing assembly and the battery cell assembly, between the housing assembly and the electronic control component, and between the electronic control component and the battery cell assembly.

[0025] In the above technical solution, there is no need to set up a separate heat dissipation channel component inside the housing assembly. The space defined between the housing assembly wall and the battery cells and electronic control components is used for airflow. This allows the low-temperature airflow to be more dispersed within the housing assembly, increasing the heat exchange surface area. This enables more efficient heat exchange between the low-temperature airflow and the battery cells and electronic control components, improving heat exchange efficiency and the reliability of the battery device. Since there is no need to set up a separate heat dissipation channel component, the battery device as a whole can also have a lighter weight, which is beneficial to improving energy density.

[0026] In some embodiments of this application, the shapes of the air inlet and outlet include one or more of the following: circular, rectangular, triangular, rhomboid, and hexagonal. By setting the air inlet and outlet to include the aforementioned shapes, more design options are available for the air inlet and outlet, increasing design flexibility to meet different needs and reducing development costs.

[0027] Secondly, embodiments of this application provide an electrical device, including a battery device as described above.

[0028] In the above technical solution, since the battery device has a high cooling and heat dissipation effect, it can have high reliability. Therefore, by setting up an electrical device that includes the battery device, it is also beneficial to improve the reliability of the electrical device. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 The electrical device provided in some embodiments of this application is a structural schematic diagram of a vehicle;

[0031] Figure 2 Structural explosion of the battery device provided in some embodiments of this application Figure 1 ;

[0032] Figure 3 Structural explosion of the battery device provided in some embodiments of this application Figure 2 ;

[0033] Figure 4 A simplified schematic diagram of a partial structure of a housing assembly provided in some embodiments of this application;

[0034] Figure 5 This is a three-dimensional structural diagram of the box provided in some embodiments of this application;

[0035] Figure 6 This is a three-dimensional structural diagram of the box provided in another embodiment of this application;

[0036] Figure 7 A partial top view of the battery device provided in some embodiments of this application;

[0037] Figure 8 This is a partial perspective structural diagram of a battery device provided in some embodiments of this application;

[0038] Figure 9 A partial top view of a battery device provided in another embodiment of this application;

[0039] Figure 10 This is a partial structural side view of a battery device provided in an embodiment of this application.

[0040] icon:

[0041] 1000. Electrical appliances;

[0042] 100. Battery device;

[0043] 10. Enclosure assembly;

[0044] 11. First box body; 12. Second box body; 10a. Accommodation space; 10b. Air inlet; 10c. Air outlet; 1011. First box wall; 1012. Second box wall; 101. Box body; 101a. Opening; 102. Cover plate; 103. First reinforcing member; 104. Second reinforcing member;

[0045] 20. Battery cell modules;

[0046] 21. Battery cell;

[0047] 30. Air supply components;

[0048] 40. Electrical control components;

[0049] 501, First flow channel; 502, Second flow channel; 503, Third flow channel; 504, Fourth flow channel;

[0050] 200, Controller; 300, Motor; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0053] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0057] In this application, "multiple" means two or more (including two).

[0058] In this application, the battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, and the embodiments of this application are not limited to these. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0059] The battery apparatus mentioned in the embodiments of this application can refer to an assembly of one or more battery cells for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar. In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0060] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0061] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing. As an example, the individual battery cell assembly may be a battery module, which can be housed within the housing by securing the battery module to the housing. Alternatively, the individual battery cell assembly may be housed within the housing by directly securing multiple individual battery cells to the housing. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the individual battery cells.

[0062] A single battery cell includes a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, while the uncoated positive current collector protrudes beyond the coated one, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0063] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0064] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, batteries, as the power source, play an irreplaceable and crucial role. A battery consists of a casing and multiple individual battery cells housed within it. As a core component of new energy vehicles, batteries have high requirements in terms of both safety and lifespan. However, the individual battery cells generate a significant amount of heat during continuous charging and discharging, causing a sharp rise in the internal temperature of the battery and severely impacting its reliability. Therefore, improving the heat dissipation performance of batteries to enhance their reliability has become an urgent problem to be solved.

[0065] In some air-cooled batteries, an external fan is typically mounted on the battery casing. The fan and internal cooling channels circulate air throughout the battery pack, reducing the impact of uneven system temperature and improving overall battery performance. In this type of air-cooled battery, rectangular slots are designed as air inlets on the casing walls, and evenly spaced circular holes on the side walls serve as air outlets. A separate structural component within the casing acts as the cooling channel, with vents evenly spaced on its side walls. The fan draws cooler air from the outside into the cooling channel, where it exchanges heat with the casing's interior through the channel's side walls, thus cooling the battery. However, this method results in low overall heat exchange efficiency, failing to achieve the desired cooling effect and offering limited improvement in battery reliability. Furthermore, the internal cooling channels increase the overall weight and cost of the battery pack and do not necessarily improve its energy density.

[0066] Based on the above considerations, in order to further address the problem of insufficient heat dissipation and cooling effect of the battery, which affects battery reliability, the applicant has designed a battery device, including: a housing assembly, a battery cell assembly, and an air supply component. The housing assembly has an internal receiving space and multiple air inlets and outlets communicating with the receiving space. The air inlets have a first axial direction pointing from the outside to the inside of the housing assembly, and along this first axial direction, the area enclosed by the cross-sectional profile perpendicular to the first axial direction gradually decreases. The air outlets have a second axial direction pointing from the inside to the outside of the housing assembly, and along this second axial direction, the area enclosed by the cross-sectional profile perpendicular to the second axial direction gradually decreases. The battery cell assembly is disposed within the receiving space and includes one or more battery cells.

[0067] In this battery device structure, both the air inlet and outlet of the housing assembly feature a tapered orifice design. As airflow passes through these orifices, the cross-sectional area gradually decreases, resulting in a gradual increase in airflow velocity. When air enters the housing space through the air inlet, the increased inflow velocity enhances airflow turbulence within the housing space, increasing the mixing between the warmer air inside and the incoming cooler airflow. This leads to more efficient heat exchange within the housing space. Conversely, when air exits through the air outlet, the increased outflow velocity accelerates the removal of the warmer airflow after heat exchange, thus removing heat more efficiently. Therefore, this design improves the overall heat exchange efficiency of the battery device, resulting in better heat dissipation and cooling, and ultimately enhancing the reliability of the battery device.

[0068] The battery device disclosed in this application can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft, or it can be used to form a power system for such electrical devices.

[0069] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0070] For ease of explanation, the following embodiments use a vehicle as an example to illustrate an electrical device 1000 according to an embodiment of this application. Please refer to... Figure 1 , Figure 1 The electrical device 1000 provided in some embodiments of this application is a structural schematic diagram of a vehicle. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source. The vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle during starting, navigation, and driving.

[0071] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0072] Please refer to Figure 2 , Figure 2This is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing assembly 10 and a plurality of battery cells 21, which are housed within the housing assembly 10. The housing assembly 10 provides assembly space for the battery cells 21, and can employ various structures. In some embodiments, the housing assembly 10 may include a first housing body 11 and a second housing body 12, which overlap each other, jointly defining an assembly space for accommodating the battery cells 21. The second housing body 12 may be a hollow structure open at one end, and the first housing body 11 may be a plate-like structure, covering the open side of the second housing body 12 so that the first housing body 11 and the second housing body 12 jointly define the assembly space; alternatively, both the first housing body 11 and the second housing body 12 may be hollow structures open on one side, with the open side of the first housing body 11 covering the open side of the second housing body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can be of various shapes, such as cylinder, cuboid, etc.

[0073] In the battery device 100, multiple battery cells 21 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 21 are connected in both series and parallel configurations. Multiple battery cells 21 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of multiple battery cells 21 is housed within the housing assembly 10. Alternatively, the battery device 100 can also consist of multiple battery cells 21 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing assembly 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 21.

[0074] Please refer to Figure 2 , Figure 2 The following is an exploded view of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes multiple rows of battery cells 21, which are arranged along the length of the housing assembly 10. Each row of battery cells 21 includes a plurality of battery cells 21 arranged along the width direction of the housing assembly 10; or, the multiple rows of battery cells 21 are arranged along the width of the housing assembly 10, and each row of battery cells 21 includes a plurality of battery cells 21 arranged along the length direction of the housing assembly 10.

[0075] Each battery cell 21 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 21 that can be recharged after discharge to activate its active materials and continue to be used. It can also be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited in this regard. The battery cell 21 can be cylindrical, flat, cuboid, or other shapes. For example, in... Figure 2 In the middle, the shape of the battery cell 21 is a cuboid.

[0076] According to some embodiments of this application, refer to Figure 3 and Figure 4 This application provides a battery device 100, including a housing assembly 10 and a battery cell assembly 20. The housing assembly 10 has an internal accommodating space 10a, and a plurality of air inlets 10b and air outlets 10c communicating with the accommodating space 10a. The air inlets 10b have a first axial direction F1 pointing from the outside to the inside of the housing assembly 10, and the area enclosed by the cross-sectional profile perpendicular to the first axial direction F1 gradually decreases along the first axial direction F1. The air outlets 10c have a second axial direction F2 pointing from the inside to the outside of the housing assembly 10, and the area enclosed by the cross-sectional profile perpendicular to the second axial direction F2 gradually decreases along the second axial direction F2. The battery cell assembly 20 is disposed within the accommodating space 10a and includes one or more battery cells 21. The housing assembly 10 can refer to a structural component used to accommodate and protect the battery cell assembly 20 and other related electrical components, and can isolate the battery cell assembly 20 and other related electrical components from the external environment. The enclosure assembly 10 can be made of materials such as, but not limited to, metal or high-strength plastic. Metal materials may include, but are not limited to, aluminum alloys, steel, etc., while high-strength plastics may include, but are not limited to, polycarbonate, glass fiber reinforced nylon, polyphenylene sulfide, etc. The accommodating space 10a can refer to the space formed inside the enclosure assembly 10.

[0077] The air inlet 10b can refer to the hole that connects the accommodating space 10a to the external environment.

[0078] Reference Figure 4The first axial direction F1 can refer to the direction that is in the same direction as the depth of the air inlet 10b and points from the outside to the inside of the housing assembly 10. The phrase "the area enclosed by the cross-sectional profile of the air inlet 10b perpendicular to the first axial direction F1 gradually decreases" can be understood as follows: the air inlet 10b can be, but is not limited to, a regular-shaped hole or an irregular-shaped hole, etc. A regular-shaped hole can be, but is not limited to, a round hole, a rectangular hole, or a rhomboid hole, etc. When the air inlet 10b is a round hole, the diameter of the air inlet 10b can gradually decrease along the first axial direction F1; when the air inlet 10b is a rectangular hole or a rhomboid hole, the side length of the air inlet 10b can gradually decrease along the first axial direction F1. An irregular-shaped hole can refer to an irregularly shaped hole. When the air inlet 10b is an irregularly shaped hole, it is sufficient that the cross-sectional area of ​​the air inlet 10b opening gradually decreases along the first axial direction F1. In other words, the air inlet 10b is a tapered orifice with a gradually decreasing cross-section. With this orifice structure, the airflow velocity increases and the airflow disturbance increases when it flows through the air inlet 10b, thereby enabling the lower temperature airflow entering to mix and exchange heat fully with the higher temperature airflow in the accommodating space 10a, thus improving the heat exchange efficiency.

[0079] Reference Figure 4 The second axial direction F2 can refer to the direction that is in the same direction as the depth of the air outlet 10c and points from the inside to the outside of the housing assembly 10. "The area enclosed by the cross-sectional profile of the air outlet 10c perpendicular to the second axial direction F2 gradually decreases" can be referred to the explanation of the air inlet 10b. With this structure, the airflow can increase the outflow velocity when it flows out of the air outlet 10c, quickly carrying away heat, which is also beneficial to the heat exchange efficiency inside the housing assembly 10.

[0080] Battery cell assembly 20 can refer to a single module composed of one or more battery cells 21 arranged together. For example, see... Figure 3 The battery cell assembly 20 may include two battery cells 21 arranged side by side along a first direction X.

[0081] It should be noted that the first direction X here, as well as the second direction Y and the third direction Z mentioned later, can refer to mutually perpendicular directions. The first direction X, the second direction Y, and the third direction Z can respectively refer to one of the length direction, width direction, and height direction of the housing assembly 10. For example, referring to... Figure 3 The first direction X can be the length direction of the housing assembly 10, the second direction Y can be the width direction of the housing assembly 10, and the third direction Z can be the height direction of the housing assembly 10.

[0082] The airflow entering the air inlet 10b can be natural wind or airflow driven in by a drive component. No specific restrictions are made here in the above technical solution.

[0083] In the above technical solution, both the air inlet 10b and the air outlet 10c of the housing assembly 10 are tapered orifices. As the airflow passes through the air inlet 10b and the air outlet 10c, the flow cross-section gradually decreases, resulting in a gradual increase in airflow velocity. When the airflow enters the receiving space 10a from the air inlet 10b, the inflow velocity increases, which helps to increase the turbulence of the airflow inside the receiving space 10a. This increases the mixing between the higher-temperature air inside the receiving space 10a and the incoming lower-temperature airflow, resulting in more efficient heat exchange within the receiving space 10a. When the airflow exits from the air outlet 10c, the outflow velocity increases, accelerating the discharge of the higher-temperature airflow after heat exchange, thereby more efficiently removing heat. Therefore, adopting the above solution can improve the overall heat exchange efficiency of the battery device 100, resulting in better heat dissipation and cooling effects, and contributing to improved reliability of the battery device 100.

[0084] In some embodiments of this application, reference is made to Figures 3 to 6 The housing assembly 10 includes a first housing wall 1011 and a second housing wall 1012. The first housing wall 1011 is provided with air inlets 10b arranged in an array, and the second housing wall 1012 is provided with air outlets 10c arranged in an array.

[0085] The first box wall 1011 and the second box wall 1012 can refer to the wall panels that form the box assembly 10, and the first box wall 1011 and the second box wall 1012 are different wall panels.

[0086] refer to Figure 5 and Figure 6 The phrase "air inlets 10b arranged in an array" can be understood as follows: air inlets 10b are arranged in multiple rows in the third direction Z of the first housing wall 1011, and each row of air inlets 10b is arranged in multiple directions X or Y.

[0087] refer to Figure 5 and Figure 6 The phrase "the air outlets 10c are arranged in an array" can be understood as follows: the air outlets 10c are arranged in multiple rows in the third direction Z of the second box wall 1012, and each row of air outlets 10c is arranged in multiple rows along the second direction Y.

[0088] In the above technical solution, by arranging the air inlet 10b and air outlet 10c on different housing walls, the risk of airflow short-circuiting can be reduced, allowing the airflow to flow orderly within the housing space 10a. The lower-temperature airflow, entering through the air inlet 10b, can pass relatively evenly through components such as the battery cell assembly 20, fully absorbing heat before being discharged through the air outlet 10c, thus improving heat exchange efficiency. By arranging the air inlets 10b in an array on the first housing wall 1011 and the air outlets 10c in an array on the second housing wall 1012, the number of air inlets 10b and air outlets 10c can be increased, which helps to increase the airflow volume, improve heat exchange efficiency, and enhance the reliability of the battery device 100.

[0089] In some embodiments of this application, reference is made to Figure 3 , Figure 5 and Figure 6 The air inlets 10b of any two adjacent rows of the first box wall 1011 are staggered, and the air outlets 10c of any two adjacent rows of the second box wall 1012 are staggered.

[0090] For example, refer to Figure 3 , Figure 5 and Figure 6 In the third direction Z, any two adjacent rows of air inlets 10b on the first box wall 1011 are staggered in the first direction X or the second direction Y; in the third direction Z, any two adjacent rows of air outlets 10c on the second box wall 1012 are staggered in the second direction Y.

[0091] When the airflow enters the containing space 10a through the air inlet 10b of the first box wall 1011, the airflow entering the containing space 10a with the air inlet 10b arranged as described above will not form a direct collision in the same vertical direction. The airflow can enter the containing space 10a from different positions and angles, and the airflow distribution is more dispersed and uniform. This can reduce the probability of local high-speed airflow and promote more thorough mixing of gases at different heights and positions in the containing space 10a, forming a more complex flow path. The mixing of gases at different heights can also make the temperature distribution in the containing space 10a more uniform, reduce the heat stress inside the box assembly 10, and help improve the heat exchange efficiency.

[0092] When the airflow flows out of the containment space 10a from the air outlet 10c of the second box wall 1012, the air outlet 10c arranged as described above allows the higher temperature airflow after heat exchange to flow out of the containment space 10a from different heights and positions, which can increase the flow path of the airflow and discharge the airflow more quickly, and also help to improve the heat exchange efficiency.

[0093] In the above technical solution, the staggered arrangement of any two adjacent rows of air inlets 10b on the first housing wall 1011 allows for more dispersed and uniform airflow into the containing space 10a, facilitating thorough mixing and heat exchange between the low-temperature airflow and the higher-temperature air within the containing space 10a, thereby improving heat exchange efficiency. Similarly, the staggered arrangement of any two adjacent rows of air outlets 10c on the second housing wall 1012 increases the airflow exit path, reduces the risk of localized turbulence during airflow discharge, and allows for more efficient airflow discharge, further enhancing heat exchange efficiency. Therefore, the arrangement of the air inlets 10b and outlets 10c enables the battery device 100 to achieve higher heat exchange efficiency, thereby improving the reliability of the battery device 100.

[0094] In some embodiments of this application, reference is made to Figure 3 , Figure 5 and Figure 6 The first box wall 1011 and the second box wall 1012 are arranged adjacent to and / or opposite to each other.

[0095] For example, refer to Figure 3 , Figure 5 and Figure 6 The housing assembly 10 can be rectangular in shape. There can be three first housing walls 1011 and one second housing wall 1012. That is, the housing assembly 10 can have air intake on three sides and air outlet on one side. Therefore, the second housing wall 1012 can be positioned opposite to one of the first housing walls 1011 and adjacent to the other two first housing walls 1011. With this embodiment, since the number of first housing walls 1011 with air inlets 10b is greater, the effect of increasing airflow disturbance within the accommodating space 10a is better, which is beneficial for improving heat exchange efficiency.

[0096] Reference Figure 8 and Figure 9 When the shape of the housing assembly 10 is rectangular, there can be two first housing walls 1011 and two second housing walls 1012. That is, the housing assembly 10 can have air intake on two sides and air outlet on two sides. The two first housing walls 1011 are located on adjacent sides at one end of the diagonal of the housing assembly 10, and the two second housing walls 1012 are located on adjacent sides at the other end of the diagonal of the housing assembly 10.

[0097] When the shape of the housing assembly 10 is rectangular, the first housing wall 1011 and the second housing wall 1012 can both be one, that is, the housing assembly 10 can have one side for air intake and one side for air exhaust, and the first housing wall 1011 and the second housing wall 1012 are located at opposite ends of the housing assembly 10.

[0098] When the battery device 100 is working, it forms a heat dissipation boundary around the housing assembly 10. The heat dissipation boundary can refer to the edge range of heat transfer in the battery device 100. For example, the battery device 100 may include a structure composed of the housing assembly 10, the battery cell assembly 20 and the electronic control component 40, etc. The heat dissipation boundary can refer to the outermost layer of this structure. After heat is generated from the battery cell assembly 21, it can be transferred to this boundary by airflow.

[0099] In the above technical solution, by setting the first box wall 1011 and the second box wall 1012 adjacent to and / or opposite to each other, the airflow path inside the box assembly 10 can be flexibly adjusted. Since the battery cells 21 in the accommodating space 10a are grouped or arranged differently, the heat dissipation boundaries around the box assembly 10 will be different. The temperature of the battery cells 21 near the box wall with poor heat dissipation boundary is higher, and the temperature of the battery cells 21 near the box wall with good heat dissipation boundary is lower. Therefore, the setting position of the first box wall 1011 and the second box wall 1012 can be adjusted according to the overall heat dissipation boundary of the battery device 100, thereby improving the overall heat dissipation and cooling effect of the battery device 100, so that the battery cell assembly 20 can be at a suitable operating temperature, thereby improving the reliability of the battery device 100.

[0100] In some embodiments of this application, reference is made to Figure 5 and Figure 6 The first box wall 1011 has two rows and / or two columns of air inlets 10b arranged close to the edge of the first box wall 1011; the second box wall 1012 has two rows and / or two columns of air inlets 10c arranged close to the edge of the second box wall 1012.

[0101] Reference Figure 5 and Figure 6 "The first and last two rows of air inlets 10b of the first box wall 1011" can refer to the two rows of air inlets 10b located at both ends of the third direction Z. "The first and last two columns of air inlets 10b of the first box wall 1011" can refer to the two columns of air inlets 10b located at both ends of the first direction X or the second direction Y.

[0102] The phrase "the first and last two rows and / or two columns of air inlets 10b of the first box wall 1011 are arranged close to the edge of the first box wall 1011" can be understood as follows: only the first and last two rows of air inlets 10b of the first box wall 1011 are arranged close to the edges of the third direction Z of the first box wall 1011; or, only the first and last two columns of air inlets 10b of the first box wall 1011 are arranged close to the edges of the first direction X or the second direction Y of the first box wall 1011; or, the first and last two rows of air inlets 10b of the first box wall 1011 are arranged close to the edges of the third direction Z of the first box wall 1011, and the first and last two columns of air inlets 10b of the first box wall 1011 are arranged close to the edges of the first direction X or the second direction Y of the first box wall 1011.

[0103] Reference Figure 5 and Figure 6 The phrase "the first and last two rows of air vents 10c of the second housing wall 1012" can refer to two rows of air vents 10c located at both ends of the third direction Z. "The first and last two rows of air vents 10c of the second housing wall 1012" can also refer to two rows of air vents 10c located at both ends of the second direction Y. It can be understood that only the first and last two rows of air vents 10c of the second housing wall 1012 are adjacent to the edges of both ends of the third direction Z of the second housing wall 1012; or, only the first and last rows of air vents 10c of the second housing wall 1012 are adjacent to the edges of both ends of the second direction Y of the second housing wall 1012; or, the first and last two rows of air vents 10c of the second housing wall 1012 are adjacent to the edges of both ends of the third direction Z of the second housing wall 1012, and the first and last rows of air vents 10c of the second housing wall 1012 are adjacent to the edges of both ends of the second direction Y of the second housing wall 1012.

[0104] In the above technical solution, the air inlet 10b arranged in the above manner increases the total airflow cross-section of all air inlets 10b in the first housing wall 1011, increasing the airflow volume. This facilitates providing more low-temperature airflow and accommodating the space 10a for heat exchange, thereby improving heat exchange efficiency. Similarly, the air outlet 10c arranged in the above manner increases the total airflow cross-section of all air outlets 10c in the second housing wall 1012, increasing the airflow volume. This facilitates the rapid discharge of the higher-temperature airflow after heat exchange, further improving heat exchange efficiency. This solution further improves the overall heat exchange efficiency of the battery device 100, thereby enhancing its reliability.

[0105] In some embodiments of this application, the battery device 100 includes an air supply component 30 disposed on the housing assembly 10 for driving airflow from the air inlet 10b into the receiving space 10a.

[0106] The air supply component 30 can refer to a component that can drive airflow from the air inlet 10b into the receiving space 10a and drive the heat-exchanged airflow from the air outlet 10c out of the receiving space 10a. The air supply component 30 can be, but is not limited to, a fan, an air pump, etc., and the fan can be, but is not limited to, a vortex fan, a centrifugal fan, etc.

[0107] In the above technical solution, the air supply component 30 can drive the low-temperature airflow from the external environment into the accommodating space 10a through the air inlet 10b, and drive the heat-exchanged airflow out through the air outlet 10c. Thus, the air supply component 30 can provide the driving force to drive the airflow, and the rapid airflow into and out of the accommodating space 10a is beneficial to improving the heat exchange efficiency, thereby providing a suitable working environment for the inside of the battery device 100 and improving the reliability of the battery device 100.

[0108] In some embodiments of this application, reference is made to Figure 3 and Figure 7 The air supply component 30 is provided on or near the second box wall 1012 to drive the airflow out of the receiving space 10a through the air outlet 10c.

[0109] The air supply component 30 can be fixed to the second housing wall 1012, or it can be fixed to another position on the housing assembly 10, close to the second housing wall 1012. (Refer to...) Figure 7 , Figure 7 The arrows in the diagram indicate the direction of airflow. In this scheme, the air supply component 30 can create a negative pressure on one side of the second box wall 1012 by drawing air from the containment space 10a. This causes the airflow from the external environment to enter the containment space 10a from the air inlet 10b of the first box wall 1011 under the action of the pressure difference. During the flow, the airflow exchanges heat with the gas in the containment space 10a.

[0110] In the above technical solution, the air supply component 30 can dissipate heat by drawing air from the containing space 10a, which optimizes airflow. A negative pressure can be formed inside the containing space 10a, allowing airflow from the external environment to naturally flow into it. This results in a more even distribution of airflow throughout the containing space 10a, reducing the occurrence of excessively strong or weak local airflow, improving the uniformity of heat dissipation, and reducing the occurrence of airflow short circuits. New low-temperature airflow can flow into the containing space 10a from all directions, facilitating full contact between the low-temperature airflow and the gas inside the containing space 10a. Furthermore, the airflow can be quickly extracted, thereby improving heat dissipation efficiency and the reliability of the battery device 100. Since the above solution involves drawing air from the containing space 10a, dust, moisture, and other impurities from the external environment are less likely to enter the housing assembly 10, helping to maintain the cleanliness of the housing assembly 10. Moreover, the rapid extraction of air also helps reduce the risk of fire inside the housing assembly 10, further improving the reliability of the battery device 100.

[0111] In some embodiments of this application, reference is made to Figure 8 and Figure 9 The air supply component 30 is located on or near the first box wall 1011 to drive airflow through the air inlet 10b into the accommodating space 10a.

[0112] The air supply component 30 can be fixed to the first housing wall 1011, or it can be fixed to another position on the housing assembly 10, close to the first housing wall 1011. (Refer to...) Figure 9 , Figure 9 The arrows in the diagram indicate the direction of airflow. In this scheme, the air supply component 30 can blow air from the air inlet 10b of the first box wall 1011 into the containing space 10a, and drive the airflow out from the air outlet 10c of the second box wall 1012. The low-temperature airflow exchanges heat with the gas in the containing space 10a during the flow process.

[0113] In the above technical solution, the air supply component 30 can dissipate heat by supplying air into the housing space 10a. It can directly blow low-temperature air onto the battery cells 21 and other components. This forced convection method can quickly remove the heat generated inside the battery device 100 during operation, which is beneficial for rapid cooling. Furthermore, it is not overly restricted by external environmental factors such as temperature and air pressure, which helps to provide a continuous and stable low-temperature airflow, improving heat exchange reliability and thus enhancing the reliability of the battery device 100. By blowing air into the housing space 10a, the air supply component 30 can also create positive pressure inside the housing space 10a. After installing a filter device at the location of the air supply component 30 or the air inlet 10b, the risk of dust, debris, or moisture entering the housing space 10a can be reduced, helping to keep the housing space 10a clean, reducing the probability of short circuits in the battery cells 21, and also improving the reliability of the battery device 100.

[0114] In some embodiments of this application, reference is made to Figure 3 , Figures 7 to 9 The air supply component 30 is located on the outside of the housing assembly 10. In the above technical solution, by placing the air supply component 30 on the outside of the housing assembly 10, the internal space of the housing space 10a can be saved, which is conducive to arranging larger volume or more number of battery cells 21, improving the energy density of the battery device 100. Moreover, the air supply component 30 is located on the outside, which also facilitates inspection or maintenance and can reduce maintenance costs.

[0115] In some embodiments of this application, reference is made to Figure 3 , Figure 5 and Figure 6 The box assembly 10 includes a box body 101 and a cover plate 102. The box body 101 has an opening 101a, and the cover plate 102 covers the opening 101a and together with the box body 101 defines an accommodating space 10a. A first box wall 1011 and a second box wall 1012 are provided on the box body 101.

[0116] The container 101 can refer to a container having an opening 101a. The cover 102 can refer to a plate-like component used to cover the opening 101a. The container 101 can include multiple container walls, which are connected and together form the container 101. The multiple container walls can include, but are not limited to, side walls, bottom walls, or top walls, etc.

[0117] Wherein, if the top of the box 101 forms an opening 101a, the multiple box walls may include a top wall; if the top wall of the box 101 forms an opening 101a, the multiple box walls may include a bottom wall. The first box wall 1011 may be one or more of the multiple box walls, and the second box wall 1012 may also be one or more of the multiple box walls.

[0118] In the above technical solution, by setting the first box wall 1011 and the second box wall 1012 on the box body 101, that is, by setting the air inlet 10b and the air outlet 10c on the box body 101, the structure of the box body 101 is more stable and stronger than that of the cover plate 102, and is less prone to deformation. This improves the reliability of the air inlet 10b and the air outlet 10c, which is beneficial to improving ventilation performance and the reliability of the battery device 100. Since the cover plate 102 is generally set on the top of the box body 101, and the side walls and bottom walls of the box body 101 are not prone to dust accumulation, setting the air inlet 10b and the air outlet 10c on the box body 101 also reduces the risk of dust, moisture and other impurities accumulating and intruding. This is beneficial to the more stable operation of the heat dissipation of the battery device 100, and also helps to improve the reliability of the battery device 100.

[0119] In some embodiments of this application, reference is made to Figure 3 , Figures 7 to 10 The battery device 100 includes an electronic control component 40, which is disposed in the receiving space 10a and electrically connected to the battery cell 21, and the electronic control component 40 is close to the first box wall 1011.

[0120] The electronic control component 40 may include, but is not limited to, components such as a battery management system (BMS), relays and contactors, current sensors and voltage sensors, and DC-DC converters. The electronic control component 40 may be electrically connected to the battery cell 21 for managing or controlling the battery cell 21. For example, the electronic control component 40 may be a high-voltage box.

[0121] During the operation of the battery device 100, the electronic control component 40 generates a relatively large amount of heat, belonging to the area with the highest internal temperature of the housing assembly 10. In the above technical solution, since the first housing wall 1011 is provided with an air inlet 10b, and the electronic control component 40 is close to the first housing wall 1011, the low-temperature airflow from the outside can promptly cool and dissipate heat from the electronic control component 40 when it enters the air inlet 10b. This helps the electronic control component 40 maintain a stable operating state, thereby more stably managing or controlling the battery cells 21, and improving the overall reliability of the battery device 100.

[0122] In some embodiments of this application, reference is made to Figure 9 The battery device 100 includes an electronic control component 40 disposed within the receiving space 10a and electrically connected to the battery cell 21. Airflow passages for airflow are defined between the housing assembly 10 and the battery cell assembly 20, between the housing assembly 10 and the electronic control component 40, and between the electronic control component 40 and the battery cell assembly 20.

[0123] Reference Figure 9For example, there can be multiple airflow channels, including a first flow channel 501, a second flow channel 502, a third flow channel 503, and a fourth flow channel 504. For ease of understanding, the first flow channel 501, the second flow channel 502, the third flow channel 503, and the fourth flow channel 504 are... Figure 9 The diagram is simplified using dashed boxes. Specifically, a first flow channel 501 is defined between the first wall 1011 of the housing assembly 10 at one end in the first direction X and the battery cell 21; a second flow channel 502 is defined between the first wall 1011 of the housing assembly 10 at one end in the second direction Y and the battery cell 21; a third flow channel 503 is defined between the second wall 1012 of the housing assembly 10 at the other end in the first direction X and the battery cell 21; and a fourth flow channel 504 is defined between the second wall 1012 of the housing assembly 10 at the other end in the second direction Y and the battery cell 21.

[0124] In the above technical solution, a separate heat dissipation channel component is not required inside the housing assembly 10. The space defined between the housing assembly 10 wall and the battery cell assembly 20 and electronic control component 40 is used for airflow. This facilitates the more dispersed low-temperature airflow within the housing assembly 10, increasing the heat exchange surface area. Consequently, the low-temperature airflow can more fully exchange heat with the battery cell 21 and electronic control component 40, improving heat exchange efficiency and the reliability of the battery device 100. Since a separate heat dissipation channel component is not required, the battery device 100 can also have a lighter overall weight, which is beneficial for increasing energy density.

[0125] In some embodiments of this application, reference is made to Figure 5 and Figure 6 The shapes of the air inlet 10b and the air outlet 10c include one or more of the following: circle, rectangle, triangle, rhombus, and hexagon.

[0126] For example, refer to Figure 5 The air inlet 10b and air outlet 10c can be circular holes. (Refer to...) Figure 6 The air inlet 10b and the air outlet 10c can also be rectangular holes.

[0127] In the above technical solution, by setting the air inlet 10b and air outlet 10c to include the above shape, more options can be provided for the design of the air inlet 10b and air outlet 10c, improving design flexibility to meet different needs and reducing development costs.

[0128] In some embodiments of this application, reference is made to Figure 3 , Figures 5 to 10 The housing assembly 10 also includes a first reinforcing member 103, which is connected to the housing wall of the housing 101 and extends in the third direction Z.

[0129] The first reinforcing member 103 can be, but is not limited to, sheet metal parts or columnar parts, etc. For example, the first reinforcing member 103 can be a vertical reinforcing beam.

[0130] In the above technical solution, the first reinforcing member 103 can improve the strength and rigidity of the housing 101 in the third direction Z, which is conducive to improving the overall structural strength and rigidity of the housing 101, improving the reliability of the housing assembly 10, and providing a more reliable working environment for components such as the battery cell assembly 20 and the electronic control component 40, thereby improving the overall reliability of the battery device 100.

[0131] Optionally, the first reinforcing member 103 is located on the outside of the housing 101. By adopting this technical solution, the first reinforcing member 103 can save internal space of the housing 101, which is conducive to arranging larger or more numerous battery cells 21 inside the housing 101, improving the energy density of the battery device 100, and also facilitates the arrangement of the electronic control components 40, making assembly or disassembly convenient, as well as facilitating later inspection or maintenance.

[0132] In some embodiments of this application, reference is made to Figure 5 , Figure 6 and Figure 10 The housing assembly 10 also includes a second reinforcing member 104, which is connected to the bottom wall of the housing 101 and extends along the first direction X and / or the second direction Y.

[0133] The explanation of the second reinforcing member 104 can be referred to the first reinforcing member 103 mentioned above, and will not be repeated here. For example, the second reinforcing member 104 can be a reinforcing beam. The second reinforcing member 104 can extend along the first direction X of the box body 101; the second reinforcing member 104 can also extend along the second direction Y of the box body 101; when there are multiple second reinforcing members 104, some can extend along the first direction X of the box body 101, and the rest can extend along the second direction Y of the box body 101.

[0134] In the above technical solution, the second reinforcing member 104 can improve the strength and rigidity of the housing 101 in the first direction X and / or the second direction Y, which is conducive to improving the overall structural strength and rigidity of the housing 101, improving the reliability of the housing assembly 10, and providing a more reliable working environment for components such as the battery cell assembly 20 and the electronic control component 40, thereby improving the overall reliability of the battery device 100.

[0135] In some embodiments, reference is made to Figure 5 , Figure 6 and Figure 10The second reinforcing member 104 is located inside the housing 101. In this technical solution, the second reinforcing member 104 can be located between the battery cell 21 and the bottom wall of the housing 101, thereby separating the battery cell 21 from the bottom wall of the housing 101, reducing the risk of damage to the battery cell 21 caused by external objects impacting the bottom wall of the housing 101, which helps to improve the reliability of the battery cell 21, and thus improves the reliability of the battery device 100.

[0136] In some embodiments, the second reinforcing member 104 is located on the outside of the housing 101. By adopting this technical solution, the second reinforcing member 104 can save internal space of the housing 101, which is conducive to arranging larger or more numerous battery cells 21 inside the housing 101, thereby improving the energy density of the battery device 100. It is also conducive to the arrangement of the electronic control components 40, making assembly or disassembly convenient, and also convenient for later inspection or maintenance.

[0137] Reference Figure 1 This application provides an electrical device 1000, including a battery device 100 as described in any of the preceding embodiments. In the above technical solutions, since the battery device 100 has a high cooling and heat dissipation effect, it can have high reliability. Therefore, by providing an electrical device 1000 including the battery device 100, the reliability of the electrical device 1000 is also improved.

[0138] A battery device 100 provided according to an embodiment of this application includes: a housing assembly 10, a battery cell assembly 20, and an air supply component 30.

[0139] The housing assembly 10 includes a housing 101 and a cover plate 102. The housing 101 has an opening 101a, and the cover plate 102 covers the opening 101a and together with the housing 101 defines the accommodating space 10a.

[0140] The housing 101 includes a first housing wall 1011 and a second housing wall 1012. The first housing wall 1011 has air inlets 10b arranged in an array, with any two adjacent rows of air inlets 10b staggered. The second housing wall 1012 has air outlets 10c arranged in an array, with any two adjacent rows of air outlets 10c staggered. The air inlets 10b are circular holes with a gradually decreasing diameter from the outside to the inside of the housing 101, and the air outlets 10c are circular holes with a gradually decreasing diameter from the inside to the outside of the housing 101.

[0141] The battery cell assembly 20 includes two battery cells 21 arranged side by side. The air supply component 30 is a fan and is located on the outside of the housing 101 to drive airflow into the housing 101 through the air inlet 10b. The electronic control component 40 is a high-voltage box and is located inside the housing 101.

[0142] The housing 101 does not have a separate heat dissipation channel component. Airflow passages for airflow are defined between the housing 101 and the battery cell assembly 20, between the housing assembly 10 and the electronic control component 40, and between the electronic control component 40 and the battery cell assembly 20.

[0143] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The above are merely preferred embodiments of this application and are not intended to limit the application. For those skilled in the art, unless otherwise specified, all implementation methods and optional implementation methods of this application can be combined to form new technical solutions. Unless otherwise specified, all technical features and optional technical features of this application can be combined to form new technical solutions. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: A housing assembly has an internal accommodating space and multiple air inlets and outlets communicating with the accommodating space. The air inlets have a first axial direction pointing inwards from the outside of the housing assembly, and the area enclosed by the cross-sectional profile perpendicular to the first axial direction gradually decreases along this direction. The air outlets have a second axial direction pointing outwards from the inside of the housing assembly, and the area enclosed by the cross-sectional profile perpendicular to the second axial direction gradually decreases along this direction. A battery cell assembly is disposed within the receiving space and includes one or more battery cells.

2. The battery device according to claim 1, characterized in that, The housing assembly includes a first housing wall and a second housing wall. The first housing wall is provided with air inlets arranged in an array, and the second housing wall is provided with air outlets arranged in an array.

3. The battery device according to claim 2, characterized in that, The air inlets of any two adjacent rows on the first box wall are staggered, and the air outlets of any two adjacent rows on the second box wall are staggered.

4. The battery device according to claim 2 or 3, characterized in that, The first box wall and the second box wall are arranged adjacent to and / or opposite to each other.

5. The battery device according to claim 2 or 3, characterized in that, The first and last two rows and / or two columns of air inlets on the first box wall are arranged close to the edge of the first box wall; the first and last two rows and / or two columns of air outlets on the second box wall are arranged close to the edge of the second box wall.

6. The battery device according to claim 2, characterized in that, The battery device includes an air supply component disposed on the housing assembly, used to drive airflow from the air inlet into the housing space.

7. The battery device according to claim 6, characterized in that, The air supply component is located on or near the second box wall to drive the airflow out of the containment space through the air outlet.

8. The battery device according to claim 6, characterized in that, The air supply component is located on or near the first box wall to drive the airflow into the accommodating space through the air inlet.

9. The battery device according to claim 7 or 8, characterized in that, The air supply component is located on the outside of the housing assembly.

10. The battery device according to claim 2 or 3, characterized in that, The enclosure assembly includes an enclosure and a cover plate. The enclosure has an opening, and the cover plate covers the opening and together with the enclosure defines the accommodating space. The first enclosure wall and the second enclosure wall are provided on the enclosure.

11. The battery device according to claim 2 or 3, characterized in that, The battery device includes an electronic control component disposed within the accommodating space and electrically connected to the battery cells, and the electronic control component is located close to the first casing wall.

12. The battery device according to claim 1, characterized in that, The battery device includes an electronic control component disposed within the accommodating space and electrically connected to the battery cells. Airflow passages for airflow are defined between the housing assembly and the battery cell assembly, between the housing assembly and the electronic control component, and between the electronic control component and the battery cell assembly.

13. The battery device according to claim 1, characterized in that, The shapes of the air inlet and the air outlet include one or more of the following: circular, rectangular, triangular, rhomboid, and hexagonal.

14. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 13.

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