Battery device and electric device

Abstract

Provided in the present application are a battery device and an electric device. The battery device comprises a battery cell, a case and a first pressure-balancing component. The case comprises an accommodating space and a wall plate, wherein the battery cell is accommodated in the accommodating space; the wall plate is arranged on one side of the accommodating space; and a sealed cavity is provided inside the wall plate. The first pressure-balancing component is connected to the side of the wall plate facing the accommodating space, and is configured for communicating the sealed cavity with the external environment.

Description

Battery devices and electrical appliances

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202520051570.7, filed on January 9, 2025, entitled “Battery Device and Power Consumption Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0004] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0005] In the development of battery technology, the reliability of battery devices directly affects the reliability of end products, operating costs, and user experience. Therefore, how to effectively improve the reliability of battery devices is a continuous technical challenge in battery technology. Summary of the Invention

[0006] In view of the above problems, this application provides a battery device and an electrical device that can effectively improve the reliability of the battery device.

[0007] In a first aspect, embodiments of this application provide a battery device, which includes a battery cell, a housing, and a first pressure balancing component. The housing includes an accommodating space and a wall panel. The battery cell is housed in the accommodating space, and the wall panel is disposed on one side of the accommodating space, with a sealed cavity inside the wall panel. The first pressure balancing component is connected to the side of the wall panel facing the accommodating space and serves to connect the sealed cavity to the external environment.

[0008] The sealed cavity of the above-described technical solution is connected to the external environment through a first pressure balancing component, which enables the pressure between the sealed cavity and the external environment to be balanced, reducing the risk of bulging and deformation of the wall panel due to pressure inconsistency between the sealed cavity and the external environment. Furthermore, the first pressure balancing component is connected to the side of the wall panel facing the accommodating space, reducing the risk of damage to the first pressure balancing component from the external environment. Thus, the reliability of the battery device can be effectively improved.

[0009] In some embodiments of the first aspect, the housing further includes a frame surrounding the accommodating space and connected to a wall panel, with each battery cell supported on one side of the wall panel along its thickness direction. A first pressure balancing component connects the sealed cavity and the accommodating space. The battery device also includes a second pressure balancing component connected to the frame and connecting the accommodating space to the external environment.

[0010] The above technical solution, by using a combination of a first pressure balancing component and a second pressure balancing component, offers high flexibility and is less constrained by the internal space of the housing, thereby simplifying the overall setup of the battery device.

[0011] In some embodiments of the first aspect, the housing further includes a first beam, which is received in an accommodating space and connected to a wall panel. A first pressure balancing component and a battery cell are respectively disposed on both sides of the first beam along a first direction, which is perpendicular to the thickness direction.

[0012] The first pressure balancing component and the battery cell are respectively disposed on both sides of the first beam along the first direction. The first beam can play a certain role in spacing, reducing the impact of the operation of the battery cell on the air pressure near the first pressure balancing component, thereby reducing the air pressure fluctuation near the first pressure balancing component and improving the reliability of the first pressure balancing component in regulating the pressure in the sealed cavity.

[0013] In some embodiments of the first aspect, the frame includes a first frame body, which is disposed opposite to the first beam along a first direction, and a second pressure balancing component is connected to the first frame body. In the first direction, the first pressure balancing component is disposed between the first beam and the first frame body.

[0014] The above technical solution can shorten the distance between the first pressure balancing component and the second pressure balancing component. This compact arrangement significantly reduces the path length and resistance of gas during transmission, improves the gas transmission efficiency between the sealed cavity, the accommodating space and the external environment, and the efficient gas exchange capability enables the pressure in the sealed cavity to quickly balance with the external environment pressure, thereby effectively reducing the risk of wall panel bulging and deformation caused by the inconsistency between the sealed cavity pressure and the external environment pressure.

[0015] In some embodiments of the first aspect, the battery device further includes a first sealing member that is sealingly connected between the first pressure balancing member and the wall panel.

[0016] The above technical solution introduces a first sealing component to seal the connection between the first pressure balancing component and the wall panel, which can reduce the impact of the first pressure balancing component on the sealing performance of the sealing cavity and maintain the sealing reliability of the sealing cavity.

[0017] In some embodiments of the first aspect, the first sealing member is disposed around the first pressure balancing member and connected to the side surface of the wall panel facing the receiving space.

[0018] The above technical solution can, on the one hand, further improve the sealing effect of the first sealing component at the connection between the first pressure balancing component and the wall panel; on the other hand, since the first sealing component seals the connection between the first pressure balancing component and the wall panel from the outside of the wall panel, it can also reduce the difficulty of setting up the first sealing component.

[0019] In some embodiments of the first aspect, the wall panel includes a first plate and a second plate. In the thickness direction of the wall panel, the second plate is disposed on the side of the first plate facing away from the accommodating space, and the first plate and the second plate are sealed together to form a sealed cavity. A first pressure balancing component is connected to the first plate.

[0020] The above technical solution can independently manufacture the first plate and the second plate, and then seal and connect the first plate and the second plate to form a wall panel with a sealed cavity. This facilitates the preparation, reduces the difficulty of preparing the wall panel, and helps to reduce the cost of the wall panel.

[0021] In some embodiments of the first aspect, in the thickness direction, the first plate body has a recess on the side facing the sealing cavity, and at least a portion of the first pressure balancing component is accommodated in the recess.

[0022] The above technical solution can reduce the space occupied by the first pressure balancing component in the internal space of the housing, improve the space utilization of the battery device, and help improve the energy density of the battery device.

[0023] In some embodiments of the first aspect, the first plate body is further provided with a protrusion corresponding to the recess, the protrusion protruding from the side surface of the first plate body facing away from the sealing cavity.

[0024] The above technical solution, through the combination of concave and convex parts, not only simplifies the manufacturing process of the concave part, but also further improves the structural strength of the first plate, thereby improving the stability of the first pressure balancing component.

[0025] In some embodiments of the first aspect, the first plate has a through hole extending through the first plate along its thickness direction. The battery device further includes a fixing member connected to the side of the first plate facing the sealed cavity and corresponding to the through hole. A first pressure balancing member is detachably connected to the fixing member through the through hole.

[0026] The above technical solution, by introducing through holes and fixing components, facilitates the installation of the first pressure balancing component and improves the assembly efficiency of the battery device. Furthermore, the first pressure balancing component is detachably connected to the fixing component, further facilitating its installation and removal. Especially when the first pressure balancing component needs replacement or maintenance, this significantly reduces operation time and complexity, lowering overall maintenance costs.

[0027] In some embodiments of the first aspect, the wall panel further includes a second sealing member that is sealingly connected between the first plate and the second plate and forms a sealed cavity.

[0028] The above technical solution achieves a sealed connection between the first plate and the second plate by introducing a second sealing component. It is simple to operate, highly reliable, and low in cost.

[0029] In some embodiments of the first aspect, the battery device further includes a buffer member with an elastic modulus greater than that of the first plate, the buffer member being housed in a sealed cavity and connected to the first plate.

[0030] The high elastic modulus of the buffer component enables it to effectively distribute loads when subjected to external impacts or vibrations. This absorbs a portion of the impact force when the battery device is subjected to external impacts, reducing the direct effect of external forces on the first plate and thus lowering the risk of damage to the first plate and the sealed cavity. The first plate has a lower elastic modulus, which not only allows it to more stably support the battery cells but also resists the internal pressure of the larger sealed cavity, reducing the risk of bulging deformation.

[0031] In some embodiments of the first aspect, the battery device further includes a heat exchange component, at least a portion of which is housed in a sealed cavity, and a buffer component connected between the heat exchange component and the first plate.

[0032] The buffer component is connected between the heat exchange component and the first plate to reduce the risk of impact damage caused by direct contact between the heat exchange component and the first plate when the battery device is subjected to external impact or vibration, thereby further improving the reliability of the battery device.

[0033] Secondly, this application provides an electrical device that includes a battery device provided in any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0034] 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

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Figure 1 is a schematic diagram of the vehicle structure provided in some embodiments of this application;

[0037] Figure 2 is an exploded structural diagram of a battery device provided in some embodiments of this application;

[0038] Figure 3 is a partial exploded structural diagram of the housing of a battery device provided in some embodiments of this application;

[0039] Figure 4 is a partial top view of the casing of a battery device provided in some embodiments of this application;

[0040] Figure 5 is a schematic diagram of the cross-sectional structure along AA in Figure 4;

[0041] Figure 6 is a magnified schematic diagram of the structure at point H in Figure 4.

[0042] The reference numerals in the detailed embodiments are as follows: 1. Vehicle; 2. Battery device; 3. Controller; 4. Motor; 10. Battery cell; 20. Housing; 21. Accommodation space; 22. Wall panel; 221. First plate; 222. Second plate; 223. Recess; 224. Protrusion; 225. Through hole; 226. Second sealing component; 23. Frame; 231. First frame; 24. First beam; 25. Second beam; 30. First pressure balancing component; 40. Second pressure balancing component; 50. First sealing component; 60. Fixing component; 70. Buffer component; 80. Heat exchange component; X, First direction; Z, Thickness direction. Detailed Implementation

[0043] 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 and completely 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.

[0044] 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 specification 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 specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] In this application, "multiple" means two or more (including two).

[0050] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0051] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0052] The battery device mentioned in the embodiments of this application may include a single physical module containing one or more battery cells to provide higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, parallel, or mixed via a busbar.

[0053] In some embodiments, the battery device may be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0054] In some embodiments, the battery device may be a battery pack, which includes a housing and individual battery cells, with the individual battery cells or battery modules housed within the housing.

[0055] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0056] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0057] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0058] In the development of battery technology, the reliability of battery devices directly affects the reliability of end products, usage costs, and user experience.

[0059] The walls of a battery pack enclosure typically feature sealed cavities, primarily used to house battery components and provide protection for these components and individual battery cells, as well as to enhance the enclosure's impact resistance. For example, the sealed cavities reduce the risk of corrosion and damage to components or battery cells caused by the ingress of gases or liquids from the external environment. The sealed cavities also have an energy-absorbing function; when the battery pack is subjected to collisions or compression, the sealed cavities can absorb some of the impact force, reducing deformation of the enclosure and the impact force on the individual battery cells inside.

[0060] However, due to the good sealing performance and high sealing level of the sealed cavity of the wall panel, under the conditions of heat generation and cooling of the battery device itself, changes in external ambient temperature and air pressure, a pressure difference between the inside and outside of the wall panel is easily caused, which may lead to the risk of bulging and deformation of the wall panel, seriously affecting the reliability of the battery device.

[0061] Based on the above considerations, this application provides a battery device including a battery cell, a housing, and a first pressure balancing component. The housing includes an accommodating space and a wall panel. The battery cell is housed in the accommodating space, and the wall panel is disposed on one side of the accommodating space, with a sealed cavity inside the wall panel. The first pressure balancing component is connected to the side of the wall panel facing the accommodating space and serves to connect the sealed cavity to the external environment.

[0062] The sealed cavity of the above-described technical solution is connected to the external environment through a first pressure balancing component, which enables the pressure between the sealed cavity and the external environment to be balanced, reducing the risk of bulging and deformation of the wall panel due to pressure inconsistency between the sealed cavity and the external environment. Furthermore, the first pressure balancing component is connected to the side of the wall panel facing the accommodating space, reducing the risk of damage to the first pressure balancing component from the external environment. Thus, the reliability of the battery device can be effectively improved.

[0063] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0064] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, among others. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0065] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including battery boxes and electrical devices using battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0066] Figure 1 is a schematic diagram of the structure of a vehicle provided in some embodiments of this application.

[0067] Referring again to Figure 1, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0068] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0069] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0070] Figure 2 is an exploded structural diagram of a battery device provided in some embodiments of this application; Figure 3 is a partial exploded structural diagram of the housing of a battery device provided in some embodiments of this application; Figure 4 is a partial top view of the housing of a battery device provided in some embodiments of this application; Figure 5 is a cross-sectional structural diagram along AA in Figure 4; and Figure 6 is a partially enlarged structural diagram at H in Figure 4.

[0071] Referring again to Figures 2 to 6, this embodiment of the application provides a battery device 2, which includes a battery cell 10, a housing 20, and a first pressure balancing component 30. The housing 20 includes an accommodating space 21 and a wall panel 22. The battery cell 10 is accommodated in the accommodating space 21, and the wall panel 22 is disposed on one side of the accommodating space 21, with a sealed cavity inside. The first pressure balancing component 30 is connected to the side of the wall panel 22 facing the accommodating space 21 and is used to connect the sealed cavity to the external environment.

[0072] In the battery device 2, the housing 20 is used to house the individual battery cells 10. The housing 20 can have various structures, such as a cylinder or a cuboid. There can be one or more individual battery cells 10. If there are multiple individual battery cells 10, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple individual battery cells 10 can be connected in both series and parallel connections. Multiple individual battery cells 10 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple individual battery cells 10 is housed within the housing 20. Alternatively, multiple individual battery cells 10 can first be connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules can be connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing 20.

[0073] In some examples, there are multiple battery cells 10, which are first connected in series, parallel, or mixed to form a battery module. Multiple battery modules are then connected in series, parallel, or mixed to form a whole, which is housed in the housing 20.

[0074] Multiple battery cells 10 in the battery module can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 10 in the battery module.

[0075] As an example, the wall panel 22 can be a circumferential side panel of the box 20, or it can be a top panel or a bottom panel of the box 20.

[0076] For example, the wall panel 22 and the sealed cavity inside the wall panel 22 can be integrally formed by casting or stamping processes, or the wall panel 22 and the sealed cavity inside the wall panel 22 can be formed by sealing and connecting multiple plates.

[0077] The wall panel 22 may be, but is not limited to, made of metallic or non-metallic materials. For example, metallic materials may be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, or stainless steel, etc., while non-metallic materials may be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide, or polyamide, etc.

[0078] The first pressure balancing component 30 is connected to the side of the wall panel 22 facing the accommodating space 21. In other words, at least a portion of the first pressure balancing component 30 is disposed within the accommodating space 21, meaning the first pressure balancing component 30 is located inside the housing 20 and is not exposed to the external environment. This reduces the risk of damage to the first pressure balancing component 30 from the external environment, such as objects impacting it or impurities like mud or sand clogging it.

[0079] The first pressure balancing component 30 can be detachably connected to the wall panel 22 or integrally mounted on the wall panel 22. The first pressure balancing component 30 can be directly connected to the wall panel 22 or constrained to the wall panel 22 by other components. As an example, the connection method between the first pressure balancing component 30 and the wall panel 22 can be, but is not limited to, bolt connection, welding, riveting, snap-fit, or adhesive bonding.

[0080] The number of first pressure balancing components 30 can be one or more. As an example, when there are multiple first pressure balancing components 30, the multiple first pressure balancing components 30 are spaced apart along a direction perpendicular to the thickness direction Z of the wall panel 22.

[0081] Optionally, the first pressure balancing component 30 may be, but is not limited to, a diaphragm pressure balancing valve or a spring-loaded pressure balancing valve.

[0082] The sealed cavity can be directly connected to the external environment through the first pressure balancing component 30, or indirectly connected to the external environment through the first pressure balancing component 30.

[0083] As an example, the first pressure balancing component 30 may be connected to the sealed cavity at one end and to the external environment at the other end, so that the sealed cavity is directly connected to the external environment through the first pressure balancing component 30.

[0084] As an example, the accommodating space 21 can be connected to the external environment to a certain extent, and the sealed cavity is connected to the accommodating space 21 through the first pressure balancing component 30, thereby indirectly connecting to the external environment.

[0085] The sealed cavity of the above-described technical solution is connected to the external environment through the first pressure balancing component 30, which enables the pressure between the sealed cavity and the external environment to be balanced, reducing the risk of bulging and deformation of the wall panel 22 due to pressure inconsistency between the sealed cavity and the external environment. Furthermore, the first pressure balancing component 30 is connected to the side of the wall panel 22 facing the accommodating space 21, reducing the risk of damage to the first pressure balancing component 30 from the external environment. Thus, the reliability of the battery device 2 can be effectively improved.

[0086] In some embodiments, the housing 20 further includes a frame 23, which surrounds the accommodating space 21 and is connected to the wall panel 22. The battery cell 10 is supported on one side of the wall panel 22 along its thickness direction Z. A first pressure balancing component 30 is used to connect the sealed cavity and the accommodating space 21. The battery device 2 also includes a second pressure balancing component 40, which is connected to the frame 23 and is used to connect the accommodating space 21 and the external environment.

[0087] For example, the border 23 can be a cuboid-shaped border 23, a cylindrical border 23, or other irregular border 23, etc. Accordingly, the shape of the accommodating space 21 matches the shape of the border 23. If the border 23 is a cuboid-shaped border 23, then the accommodating space 21 is a cuboid; if the border 23 is a cylindrical border 23, then the accommodating space 21 is a cylinder.

[0088] The wall panel 22 is used to support the battery cell 10; in other words, the wall panel 22 can also be called the bottom plate of the box 20.

[0089] Optionally, the frame 23 may be, but is not limited to, made of metal or non-metal materials. For example, the metal material may be copper, copper alloy, aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, or stainless steel, etc., and the non-metal material may be ceramic, polyethylene, polypropylene, polyvinyl chloride, polyimide, or polyamide, etc.

[0090] The second pressure balancing component 40 can be detachably connected to the frame 23 or integrally mounted on the frame 23. The second pressure balancing component 40 can be directly connected to the frame 23 or constrained to the frame 23 by other components. As an example, the connection method between the second pressure balancing component 40 and the frame 23 can be, but is not limited to, bolt connection, welding, riveting, snap-fit, or adhesive bonding.

[0091] The number of second pressure balancing components 40 can be one or more. As an example, when there are multiple second pressure balancing components 40, the multiple second pressure balancing components 40 are spaced apart along the extension direction of the frame 23.

[0092] Optionally, the second pressure balancing component 40 may be, but is not limited to, a diaphragm pressure balancing valve or a spring-loaded pressure balancing valve.

[0093] As an example, the first pressure balancing component 30 and the second pressure balancing component 40 can use the same balancing valve to reduce the overall structural complexity of the battery device 2 and help reduce costs.

[0094] The sealed cavity can be connected to the accommodating space 21 through the first pressure balancing component 30, and the accommodating space 21 can be connected to the external environment through the second pressure balancing component 40, so that the sealed cavity can be indirectly connected to the external environment through the accommodating space 21.

[0095] The above technical solution, by using the combination of the first pressure balancing component 30 and the second pressure balancing component 40, has a high degree of flexibility and is less restricted by the space inside the housing 20, thereby simplifying the overall setup of the battery device 2.

[0096] In some embodiments, the accommodating space 21 is sealed, and the sealed cavity is connected to the accommodating space 21 via a first pressure balancing component 30, while the accommodating space 21 is connected to the external environment via a second pressure balancing component 40. This reduces the risk of corrosion and damage to the battery cell 10 or other components caused by the entry of gases or liquids from the external environment into the accommodating space 21.

[0097] In some embodiments, the housing 20 further includes a first beam 24, which is accommodated in the receiving space 21 and connected to the wall panel 22. A first pressure balancing component 30 and a battery cell 10 are respectively disposed on both sides of the first beam 24 along a first direction X, which is perpendicular to the thickness direction Z.

[0098] The first beam 24 can be detachably connected to the wall panel 22, or it can be integrally mounted on the wall panel 22. The first beam 24 can be directly connected to the wall panel 22, or it can be constrained to the wall panel 22 by other components. As an example, the connection method between the first beam 24 and the wall panel 22 can be, but is not limited to, bolting, welding, riveting, snap-fitting, or bonding.

[0099] Optionally, the first beam 24 may be, but is not limited to, made of metallic or non-metallic materials. For example, metallic materials may be copper, copper alloys, aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, or stainless steel, while non-metallic materials may be ceramics, polyethylene, polypropylene, polyvinyl chloride, polyimide, or polyamide, etc.

[0100] The first pressure balancing component 30 and the battery cell 10 are respectively disposed on both sides of the first beam 24 along the first direction X. The first beam 24 can play a certain role in spacing, reducing the impact of the operation of the battery cell 10 on the air pressure near the first pressure balancing component 30, thereby reducing the air pressure fluctuation near the first pressure balancing component 30 and improving the reliability of the first pressure balancing component 30 in regulating the pressure in the sealed cavity.

[0101] In some embodiments, the frame 23 includes a first frame 231, which is disposed opposite to the first beam 24 along a first direction X, and a second pressure balancing component 40 is connected to the first frame 231. In the first direction X, the first pressure balancing component 30 is disposed between the first beam 24 and the first frame 231.

[0102] The above technical solution can shorten the distance between the first pressure balancing component 30 and the second pressure balancing component 40. This compact arrangement significantly reduces the path length and resistance of gas during transmission, improves the gas transmission efficiency between the sealed cavity, the accommodating space 21 and the external environment, and the efficient gas exchange capability enables the pressure in the sealed cavity to quickly balance with the external environment pressure, thereby effectively reducing the risk of bulging and deformation of the wall panel 22 due to the inconsistency between the pressure of the sealed cavity and the external environment.

[0103] In some embodiments, the housing 20 further includes a second beam 25, which is accommodated in the accommodating space 21 and connected to the wall panel 22. The second beam 25 is disposed opposite to the first beam 24 along the first direction X, and the second beam 25 is located on the side of the first beam 24 facing away from the first frame 231. The battery cell 10 is disposed between the first beam 24 and the second beam 25.

[0104] The second beam 25 can be detachably connected to the wall panel 22, or it can be integrally mounted on the wall panel 22. The second beam 25 can be directly connected to the wall panel 22, or it can be constrained to the wall panel 22 by other components. As an example, the connection method between the second beam 25 and the wall panel 22 can be, but is not limited to, bolting, welding, riveting, snap-fitting, or bonding.

[0105] Optionally, the second beam 25 may be, but is not limited to, made of metallic or non-metallic materials. For example, metallic materials may be copper, copper alloys, aluminum, aluminum alloys, nickel, nickel alloys, titanium, titanium alloys, or stainless steel, while non-metallic materials may be ceramics, polyethylene, polypropylene, polyvinyl chloride, polyimide, or polyamide, etc.

[0106] In some embodiments, the first beam 24 and the second beam 25 are made of the same material, which can simplify the manufacturing process and reduce costs.

[0107] In some embodiments, the battery device 2 further includes a first sealing member 50, which is sealed between the first pressure balancing member 30 and the wall panel 22.

[0108] For example, a sealing material can be disposed between the first pressure balancing component 30 and the wall panel 22 by means of coating or bonding to form a first sealing component 50. Optionally, the sealing material includes, but is not limited to, rubber, polyurethane, polytetrafluoroethylene, and polyetheretherketone.

[0109] The above technical solution introduces a first sealing component 50 to seal the connection between the first pressure balancing component 30 and the wall plate 22, which can reduce the impact of the setting of the first pressure balancing component 30 on the sealing performance of the sealing cavity and maintain the sealing reliability of the sealing cavity.

[0110] In some embodiments, the first sealing member 50 is disposed around the first pressure balancing member 30 and connected to the side surface of the wall panel 22 facing the accommodating space 21.

[0111] As an example, the first sealing member 50 has an annular structure, which surrounds and is connected to the outer periphery of the first pressure balancing member 30, and the side of the first sealing member 50 facing the wall panel 22 is connected to the side surface of the wall panel 22 facing the accommodating space 21.

[0112] The above technical solution can, on the one hand, further improve the sealing effect of the first sealing component 50 at the connection between the first pressure balancing component 30 and the wall panel 22; on the other hand, since the first sealing component 50 seals the connection between the first pressure balancing component 30 and the wall panel 22 from the outside of the wall panel 22, it can also reduce the difficulty of setting the first sealing component 50.

[0113] In some embodiments, the wall panel 22 includes a first plate 221 and a second plate 222. In the thickness direction Z of the wall panel 22, the second plate 222 is disposed on the side of the first plate 221 facing away from the accommodating space 21, and the first plate 221 and the second plate 222 are sealed together to form a sealed cavity. The first pressure balancing component 30 is connected to the first plate 221.

[0114] The first plate 221 can be detachably connected to the second plate 222, or it can be integrally formed on the second plate 222. The first plate 221 can be directly connected to the second plate 222, or it can be constrained to the second plate 222 by other components. As an example, the connection method between the first plate 221 and the second plate 222 can be, but is not limited to, bolt connection, welding, riveting, snap-fitting, or bonding.

[0115] In some examples, the first plate 221 and the second plate 222 are made of the same material, which simplifies the manufacturing process and reduces costs.

[0116] For example, the sealing connection between the first plate 221 and the second plate 222 can be achieved by means of, but not limited to, laser welding, adhesive sealing or bolt fastening combined with sealing gaskets.

[0117] The above technical solution can independently manufacture the first plate 221 and the second plate 222, and then seal and connect the first plate 221 and the second plate 222 to form a wall panel 22 with a sealed cavity. This facilitates the preparation, reduces the difficulty of preparing the wall panel 22, and helps to reduce the cost of the wall panel 22.

[0118] In some embodiments, the first plate 221 and the frame 23 are integrally formed structures.

[0119] On the one hand, there is no need to connect the first plate 221 and the frame 23 through an additional connection process, which simplifies the manufacturing process. On the other hand, compared with connecting the first plate 221 and the frame 23 through an additional connection process, the first plate 221 and the frame 23, which are integrated into one piece, have higher structural strength.

[0120] In some embodiments, in the thickness direction Z, the first plate 221 has a recess 223 on the side facing the sealing cavity, and at least a portion of the first pressure balancing member 30 is accommodated in the recess 223.

[0121] The first pressure balancing component 30 may be partially or entirely housed in the recess 223.

[0122] The above technical solution can reduce the space occupied by the first pressure balancing component 30 in the internal space of the housing 20, improve the space utilization of the battery device 2, and help improve the energy density of the battery device 2.

[0123] In some embodiments, the first plate 221 is further provided with a protrusion 224 corresponding to the recess 223, the protrusion 224 protruding from the side surface of the first plate 221 facing away from the sealing cavity.

[0124] For example, a recessed area may be formed locally on the first plate 221 by a stamping process. The recessed area is manifested as a recess 223 on the side of the first plate 221 facing the sealing cavity along the thickness direction Z, and as a protrusion 224 on the side of the first plate 221 away from the sealing cavity along the thickness direction Z.

[0125] The above technical solution, through the cooperation of the recess 223 and the convex part 224, can not only simplify the manufacturing process of the recess 223, but also further improve the structural strength of the first plate 221, thereby improving the stability of the first pressure balancing component 30.

[0126] In some embodiments, the first plate 221 has a through hole 225 that extends through the first plate 221 along the thickness direction Z. The battery device 2 also includes a fixing member 60, which is connected to the side of the first plate 221 facing the sealed cavity and corresponds to the through hole 225. A first pressure balancing member 30 passes through the through hole 225 and is detachably connected to the fixing member 60.

[0127] The fixing component 60 can be detachably connected to the first plate 221, or it can be integrally formed on the first plate 221. The fixing component 60 can be directly connected to the first plate 221, or it can be constrained to the first plate 221 by other components. As an example, the connection method between the fixing component 60 and the first plate 221 can be, but is not limited to, bolt connection, welding, riveting, snap-fit, or adhesive.

[0128] In some examples, the fixing component 60 is welded to the side surface of the first plate 221 facing the sealing cavity.

[0129] In some examples, at least a portion of the retaining member 60 is received in the recess 223, and the retaining member 60 is welded to the bottom wall of the recess 223.

[0130] In some examples, the fixing component 60 has an internal thread, and the first pressure balancing component 30 has an external thread that matches the internal thread. The first pressure balancing component 30 is threadedly connected to the fixing component 60.

[0131] The above technical solution, by introducing through hole 225 and fixing component 60, facilitates the installation of the first pressure balancing component 30 and improves the assembly efficiency of battery device 2. Furthermore, the first pressure balancing component 30 is detachably connected to the fixing component 60, further facilitating the installation and removal of the first pressure balancing component 30. Especially when the first pressure balancing component 30 needs to be replaced or maintained, it can significantly reduce operation time and complexity, and lower overall maintenance costs.

[0132] In some embodiments, the first sealing member 50 is disposed around the first pressure balancing member 30 and connected between the first sealing member 50 and the inner wall of the through hole 225. In other words, the first sealing member 50 seals the connection between the first pressure balancing member 30 and the wall panel 22 inside the wall panel 22.

[0133] In some embodiments, the wall panel 22 further includes a second sealing member 226, which is sealed between the first plate 221 and the second plate 222 and forms a sealed cavity.

[0134] For example, a sealing material can be disposed between the first plate 221 and the second plate 222 by means of coating or bonding to form a second sealing component 226. Optionally, the sealing material includes, but is not limited to, rubber, polyurethane, polytetrafluoroethylene, and polyetheretherketone.

[0135] As an example, the second sealing component 226 is an adhesive, such as polyurethane or epoxy resin.

[0136] The above technical solution achieves a sealed connection between the first plate 221 and the second plate 222 by introducing a second sealing component 226. It is simple to operate, highly reliable, and low in cost.

[0137] In some embodiments, the second sealing member 226 extends circumferentially along the housing 20.

[0138] In some embodiments, the second sealing member 226 is disposed around the receiving space 21.

[0139] In some embodiments, the battery device 2 further includes a buffer member 70, the elastic modulus of which is greater than that of the first plate 221, the buffer member 70 being housed in a sealed cavity and connected to the first plate 221.

[0140] The buffer component 70 can be detachably connected to the first plate 221, or it can be integrally formed on the first plate 221. The buffer component 70 can be directly connected to the first plate 221, or it can be constrained to the first plate 221 by other components. As an example, the connection method between the buffer component 70 and the first plate 221 can be, but is not limited to, bolt connection, welding, riveting, snap-fit, or bonding.

[0141] The high elastic modulus of the buffer component 70 enables it to effectively disperse the load when subjected to external impact or vibration, so as to absorb a certain impact force when the battery device 2 is subjected to external impact, reduce the direct effect of external force on the first plate 221, and thus reduce the risk of damage to the first plate 221 and the sealed cavity.

[0142] Optionally, the cushioning component 70 includes, but is not limited to, polyurethane, polyamide, silicone rubber, or metallic elastic materials (such as spring steel or titanium alloy).

[0143] Optionally, the buffer component 70 can be a block structure, a column structure, or a plate structure, etc.

[0144] The first plate 221 has a low elastic modulus, which not only enables it to more stably support the battery cell 10, but also resists the internal pressure of the larger sealed cavity, reducing the risk of bulging deformation.

[0145] Optionally, the material of the first plate 221 includes at least one of metal and plastic. Among them, metal includes, but is not limited to, aluminum, aluminum alloy, stainless steel, nickel-plated steel, etc.

[0146] Optionally, the material of the first plate 221 may include any type of high-temperature resistant and non-deformable engineering plastic, such as polyimide, polyphenylene ether resin, and polyether ether ketone.

[0147] Optionally, the material of the first plate 221 may include general-purpose plastics with good mechanical strength, such as polypropylene or polyethylene.

[0148] Metals and plastics are easy to process and obtain, which helps reduce costs.

[0149] In some embodiments, the battery device 2 further includes a heat exchange component 80, at least a portion of which is housed in a sealed cavity, and a buffer component 70 is connected between the heat exchange component 80 and the first plate 221.

[0150] The heat exchange component 80 may be partially or entirely housed within the sealed cavity. The heat exchange component 80 is used to exchange heat with the battery cells 10 located inside the housing 20.

[0151] The buffer component 70 is connected between the heat exchange component 80 and the first plate 221 to reduce the risk of impact damage caused by direct contact between the heat exchange component 80 and the first plate 221 when the battery device 2 is subjected to external impact or vibration, thereby further improving the reliability of the battery device 2.

[0152] In some embodiments, the cushioning member 70 includes an insulating element.

[0153] The insulation component effectively reduces the impact of ambient temperature fluctuations on the individual battery cells 10 located inside the housing 20. For example, in low-temperature environments, the insulation component can slow down the loss of internal heat and maintain the operating temperature of the individual battery cells 10. In high-temperature environments, the insulation component can prevent external heat from being conducted into the housing 20, preventing the battery from overheating.

[0154] As an example, the insulation component is polyurethane foam.

[0155] According to some embodiments of this application, this application also provides an electrical device, including a battery device 2 of any of the above schemes, the battery device 2 being used to store or provide electrical energy.

[0156] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. All technical features and optional technical features of this application can be combined to form new technical solutions.

[0157] To better understand the battery device 2 provided in the embodiments of this application, based on the same inventive concept, embodiments of the battery device 2 in practical applications are described herein.

[0158] This application provides a battery device 2, which includes a battery cell 10, a housing 20, a first sealing component 50, a first pressure balancing component 30, and a second pressure balancing component 40. The housing 20 includes an accommodating space 21, a wall panel 22, a frame 23, and a first beam 24. The battery cell 10 is accommodated in the accommodating space 21. The wall panel 22 is disposed on one side of the accommodating space 21 and has a sealed cavity inside. The frame 23 surrounds the accommodating space 21 and is connected to the wall panel 22. The battery cell 10 is supported on one side of the wall panel 22 along its thickness direction Z. The first pressure balancing component 30 connects the sealed cavity and the accommodating space 21. The second pressure balancing component 40 is connected to the frame 23 and connects the accommodating space 21 to the external environment. The first beam 24 is accommodated in the accommodating space 21 and connected to the wall panel 22. The first pressure balancing component 30 and the battery cell 10 are respectively disposed on both sides of the first beam 24 along a first direction X, which is perpendicular to the thickness direction Z.

[0159] The wall panel 22 includes a first plate 221 and a second plate 222. In the thickness direction Z of the wall panel 22, the second plate 222 is disposed on the side of the first plate 221 facing away from the accommodating space 21, and the first plate 221 and the second plate 222 are sealed together to form a sealed cavity. A first pressure balancing component 30 is connected to the first plate 221. A first sealing component 50 is sealed between the first pressure balancing component 30 and the first plate 221.

[0160] In the thickness direction Z, the first plate 221 has a recess 223 and a corresponding protrusion 224 on the side facing the sealing cavity. At least a portion of the first pressure balancing component 30 is accommodated in the recess 223, and the protrusion 224 protrudes from the surface of the first plate 221 on the side facing away from the sealing cavity.

[0161] The sealed cavity of the above-described technical solution is connected to the external environment through the first pressure balancing component 30, which enables the pressure between the sealed cavity and the external environment to be balanced, reducing the risk of bulging and deformation of the wall panel 22 due to pressure inconsistency between the sealed cavity and the external environment. Furthermore, the first pressure balancing component 30 is connected to the side of the wall panel 22 facing the accommodating space 21, reducing the risk of damage to the first pressure balancing component 30 from the external environment. Thus, the reliability of the battery device 2 can be effectively improved.

[0162] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0163] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, comprising: Battery cell; The housing includes a receiving space and a wall panel, wherein the battery cell is housed in the receiving space, the wall panel is disposed on one side of the receiving space, and the wall panel has a sealed cavity inside; A first pressure balancing component is connected to the side of the wall panel facing the accommodating space and is used to connect the sealed cavity to the external environment.

2. The battery device according to claim 1, wherein, The housing also includes a frame, which surrounds the accommodating space and is connected to the wall panel. The battery cell is supported on one side of the wall panel along its own thickness direction. The first pressure balancing component is used to connect the sealed cavity and the accommodating space. The battery device further includes a second pressure balancing component, which is connected to the frame and serves to connect the accommodating space and the external environment.

3. The battery device according to claim 2, wherein, The enclosure also includes a first beam, which is accommodated in the receiving space and connected to the wall panel; The first pressure balancing component and the battery cell are respectively disposed on both sides of the first beam along a first direction, which is perpendicular to the thickness direction.

4. The battery device according to claim 3, wherein, The frame includes a first frame, the first frame and the first beam are disposed opposite to each other along the first direction, and the second pressure balancing component is connected to the first frame; In the first direction, the first pressure balancing component is disposed between the first beam and the first frame.

5. The battery device according to any one of claims 1-4, wherein, The battery device further includes a first sealing component, which is sealed between the first pressure balancing component and the wall panel.

6. The battery device according to claim 5, wherein, The first sealing component is disposed around the first pressure balancing component and is connected to the side surface of the wall panel facing the accommodating space.

7. The battery device according to any one of claims 1-6, wherein, The wall panel includes a first plate and a second plate. In the thickness direction of the wall panel, the second plate is disposed on the side of the first plate facing away from the accommodating space, and the first plate and the second plate are sealed together to form the sealed cavity. The first pressure balancing component is connected to the first plate.

8. The battery device according to claim 7, wherein, In the thickness direction, the first plate has a recess on the side facing the sealing cavity, and at least a portion of the first pressure balancing component is accommodated in the recess.

9. The battery device according to claim 8, wherein, The first plate also has a protrusion corresponding to the recess, the protrusion protruding from the side surface of the first plate facing away from the sealing cavity.

10. The battery device according to claim 7, wherein, The first plate has a through hole, which penetrates the first plate along the thickness direction; The battery device further includes a fixing component, which is connected to the side of the first plate facing the sealed cavity and corresponds to the through hole; The first pressure balancing component is detachably connected to the fixing component through the through hole.

11. The battery device according to claim 7, wherein, The wall panel further includes a second sealing component, which is sealed between the first plate and the second plate to form the sealed cavity.

12. The battery device according to claim 7, wherein, The battery device further includes a buffer component, the elastic modulus of which is greater than that of the first plate, and the buffer component is housed in the sealed cavity and connected to the first plate.

13. The battery device according to claim 12, wherein, The battery device further includes a heat exchange component, at least a portion of which is housed in the sealed cavity, and a buffer component is connected between the heat exchange component and the first plate.

14. An electrical device comprising a battery device as described in any one of claims 1-13, the battery device being used to store or provide electrical energy.

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