Battery devices, electrical equipment and energy storage devices

Abstract

This application provides a battery device, an electrical device, and an energy storage device, belonging to the field of battery technology. The battery device includes: a housing, comprising a first housing and a second housing, the second housing covering the first housing and defining a sealed cavity between them; and individual battery cells housed within the sealed cavity. The second housing includes an elastomer, and the sealed cavity is filled with gas. The pressure inside the sealed cavity is higher than the ambient pressure outside the housing, creating a pressure difference. This pressure difference causes the elastomer to elastically expand to a predetermined shape. Through this technical solution, the amount of rigid material used in the housing can be reduced, thereby lowering the overall weight of the battery device and meeting the lightweight design requirements of battery devices.

Description

Technical Field

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

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

[0003] The casing of a battery pack is usually made of rigid materials to provide sufficient strength to resist external impacts. For example, it is manufactured by welding aluminum alloy castings or extruded profiles. The cavity structure or profile frame formed by the casting process is welded and assembled to form the main body that supports the battery cells. However, because the casing uses a lot of rigid materials and the rigid materials are heavy, the overall weight of the battery pack is large, which is not conducive to the lightweight design of the product. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, the purpose of this application is to provide a battery device, electrical device, and energy storage device to improve the problem of the large overall weight of conventional battery devices, which is detrimental to lightweight design.

[0005] An embodiment of the first aspect of this application provides a battery device, comprising: a housing, including a first housing and a second housing, the second housing covering the first housing and defining a sealed cavity between the second housing and the first housing; a battery cell, housed within the sealed cavity; wherein the second housing includes an elastomer, the sealed cavity is filled with gas, the pressure inside the sealed cavity is higher than the ambient pressure outside the housing and forms a pressure difference, the pressure difference causing the elastomer to elastically expand to a preset shape.

[0006] In the technical solution of this application embodiment, at least a portion of the second housing of the enclosure is configured as an elastomer, and a gas with a pressure higher than standard atmospheric pressure is filled in the sealed cavity defined between the first and second housings. This creates a pressure difference between the inside and outside of the enclosure, which drives the elastomer to elastically expand to a preset shape and generate prestress. The generated prestress provides impact stiffness to the second housing. When the enclosure is subjected to external impact or compressive loads, the elastomer can undergo elastic deformation as the gas inside the enclosure is compressed, consuming the external impact energy through the gas compression process. After the external force is removed, the elastomer can return to its initial expanded shape under the drive of the gas pressure inside the enclosure. Simultaneously, because the second housing reduces the amount of rigid materials used, the overall structure of the enclosure does not require extensive thickening of metal plates and dense reinforcing ribs to maintain protective strength, thus reducing the weight of the enclosure and adapting to the lightweight design requirements of battery devices. Furthermore, the enclosure of the above technical solution can adapt to different shaped battery device installation spaces and can effectively resist external impacts through the filling of gas and the use of elastic elements.

[0007] In some embodiments, the elastomer includes an elastic film.

[0008] By designing the elastomer as an elastic membrane structure, the thinness and lower weight per unit area of ​​the elastic membrane contribute to further reducing the overall weight of the second chamber, resulting in a more significant weight reduction effect. Furthermore, the elastic membrane possesses a continuous and complete sealing interface, making it easier to form a continuous and uninterrupted sealing structure when connected with the first chamber, thus facilitating the maintenance of stable air pressure within the sealed cavity.

[0009] In some embodiments, the elastic film includes one of a thermoplastic polyurethane film, a thermoplastic polyolefin film, and a polyamide film.

[0010] Thermoplastic polyurethane film, thermoplastic polyolefin film, and polyamide film all possess high tensile strength, allowing for uniform stretching and expansion during inflation without the risk of localized tearing or damage. Among them, thermoplastic polyurethane film exhibits better low-temperature toughness, thermoplastic polyolefin film demonstrates superior aging resistance, and polyamide film demonstrates stronger resistance to high temperatures and electrolyte corrosion. The appropriate type can be flexibly selected based on the actual operating conditions of the battery device. Furthermore, all three types of films are compatible with both thermoplastic welding and adhesive bonding sealing processes, allowing them to be matched with various production line processing conditions.

[0011] In some embodiments, the thickness of the elastic film is set in the range of 0.5 mm to 2.5 mm.

[0012] By setting the thickness of the elastic film within the range of 0.5mm-2.5mm, the overall thickness of the elastic film is relatively small, which reduces the amount of material used in the second housing and further reduces the weight of the housing. Within this thickness range, the elastic film can balance tensile strength and deformation capacity, exhibiting good puncture and tear resistance. After inflation, it can expand uniformly without incomplete expansion or uneven bulging due to excessive wall thickness. It can also withstand the loads from minor impacts during assembly and use, making it suitable for the operating conditions of conventional battery devices.

[0013] In some embodiments, the gas includes compressed air or an inert gas; and / or, the gas pressure is set in the range of 0.2 MPa to 0.5 MPa.

[0014] Compressed air and inert gas are used as filling media in the sealed cavity. The gas raw materials are readily available, which can reduce the production cost of battery devices and subsequent gas replenishment and maintenance. In addition, the chemical properties of compressed air and inert gas are stable, which can slow down the aging rate of the elastic diaphragm and help extend the service life of the enclosure.

[0015] By setting the gas pressure within the range of 0.2MPa-0.5MPa, sufficient prestress can be generated on the elastic membrane inside the housing, enabling the membrane to achieve stable equivalent stiffness and meeting the protection requirements of individual battery cells without the need for membrane thickening. Simultaneously, the gas pressure is not excessively high, reducing the possibility of fatigue deformation caused by long-term tensile loads on the membrane.

[0016] In some embodiments, the first housing includes a support frame and an insulating element. The support frame supports individual battery cells, and the insulating element includes an insulating connecting shell disposed on the side of the support frame facing the second housing. The insulating connecting shell is sealed to an elastomer and forms a sealed cavity between itself and the elastomer.

[0017] The support frame serves as a stable load-bearing substrate, providing reliable stress support for the battery cells. The insulating connecting shell is positioned on the side of the support frame facing the second housing and connected to the insulating coating layer. This insulating connecting shell forms an insulating isolation layer between the battery cells and the support frame, lengthening the insulation path from the battery cells to the support frame and improving insulation protection under high-voltage conditions. Simultaneously, the insulating connecting shell facilitates docking and sealing with an elastomer, allowing the two to work together to enclose a gas-filled sealed cavity, facilitating the stable maintenance of the gas pressure within the sealed cavity.

[0018] In some embodiments, the elastomer surrounds a first receiving cavity, and the insulating connecting shell includes a bottom wall and a side wall. The bottom wall covers the support frame, and the side wall surrounds the periphery of the bottom wall and forms a second receiving cavity between the side wall and the bottom wall. The side wall is sealed to the elastomer, so that the first receiving cavity and the second receiving cavity together form a closed cavity.

[0019] The bottom wall of the insulating connecting shell covers the support frame and, together with the support frame, stably supports the battery cells, thereby further increasing the creepage distance and electrical clearance between the battery cells and the support frame, thus further reducing the risk of short circuits caused by conductive contact between the battery cells and the support frame. The ends of the side walls of the insulating connecting shell are sealed to the elastomer, so that the second receiving cavity defined by the insulating connecting shell can be closed with the first receiving cavity surrounded by the elastomer to form a sealed cavity, facilitating the uniform filling of gas into the sealed cavity.

[0020] In some embodiments, the insulating element further includes an insulating covering layer that covers the surface of the support frame and is connected to the insulating connection shell.

[0021] By covering the surface of the support frame with an insulating coating, the risk of conductive contact between the support frame and external electrical components is reduced. Furthermore, the insulating coating can be connected to the insulating connection shell, which can further increase the creepage distance and electrical clearance between the battery cells and the support frame, thereby further reducing the risk of short circuits caused by conductive contact between the battery cells and the support frame.

[0022] In some embodiments, the insulating connection shell and the insulating covering layer are integrally connected.

[0023] The insulating connecting shell and the insulating covering layer are integrally molded, eliminating the need for additional connectors. This helps reduce the number of supporting parts, simplifies the assembly process of the first housing, and reduces the amount of metal accessories used, thus optimizing the product's lightweight effect. Furthermore, the absence of assembly seams at the joint reduces the channels for high-pressure gas to escape from these seams, which helps extend the time the gas can maintain stable pressure within the sealed cavity.

[0024] In some embodiments, the sidewall is bonded to the elastomer; or, the sidewall is thermoplastically welded to the elastomer.

[0025] The sidewalls can be bonded to the second housing using an adhesive layer. This bonding method is simple and quick, improving assembly efficiency and accommodating elastomers of different materials. Alternatively, the sidewalls can be thermoplastic welded to the second housing. This involves melting the edges of the sidewalls and elastomers together at high temperatures, creating a gapless and continuous sealed interface. This enhances the reliability and stability of the connection between the sidewalls and the elastomers. Both connection methods reduce the risk of gaps between the sidewalls and the elastomer edges, thus minimizing the risk of internal gas leakage.

[0026] In some embodiments, an adhesive layer is coated on the side of the bottom wall facing the second housing, and the battery cells are bonded to the bottom wall through the adhesive layer.

[0027] The adhesive layer can smoothly and firmly attach the battery cells to the surface of the bottom wall, reducing the risk of lateral or longitudinal displacement of the battery cells under vibration conditions. In addition, the adhesive layer fills the space between the metal casing of the battery cell and the insulating bottom wall, which can further increase the creepage distance between the battery cell and the support frame, thereby improving the stability of the battery device under high voltage conditions.

[0028] In some embodiments, the thickness of the adhesive layer is set in the range of 0.5 mm to 1 mm; and / or, the thickness of the bottom wall is set in the range of 2 mm to 4 mm.

[0029] By setting the thickness of the adhesive layer within the range of 0.5mm-1mm, a 0.5mm-1mm thick adhesive layer can form a continuous and complete adhesive surface, which can stably transmit the self-weight and vibration load of the battery cell. At the same time, the adhesive layer is relatively thin, so it will not increase the overall thickness and weight of the casing too much.

[0030] By setting the thickness of the bottom wall in the range of 2mm-4mm, the load-bearing capacity can be easily transferred to evenly distribute the weight of the battery cell. This also helps to achieve a lightweight design of the product and improves the stability of the insulation between the battery cell and the support frame.

[0031] In some embodiments, the housing is provided with an air injection hole, which is connected to a sealed cavity, and the air injection hole is provided with an air injection valve.

[0032] By installing an injection valve inside the vent hole of the housing, gas can be uniformly injected into the sealed cavity during the assembly stage, causing the elastomer to expand elastically to a preset shape. Furthermore, if the air pressure inside the sealed cavity decreases after long-term use of the battery device, the injection valve can be used to replenish the gas, maintaining the expanded and molded state of the elastomer and extending the effective protection period of the housing.

[0033] In some embodiments, the first housing is provided with an installation port that communicates with a sealed cavity and is used to install a connector; and / or, the periphery of the first housing is provided with a connecting portion and a connecting hole for connecting with an external structural component.

[0034] By setting a connection port in the first housing, the connection port can be adapted to the assembly connection of the connector. The connector is installed in the installation port and electrically connected to the battery cell inside the housing. This helps to simplify the internal structural layout of the housing, improve the space utilization inside the housing, and increase the energy density of the battery device.

[0035] By providing connection holes on the periphery of the first housing, the battery device can be easily assembled and fixed to the vehicle chassis or other external structural components without the need for additional adapter metal fittings, which helps to reduce the amount of metal parts used.

[0036] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0037] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device described in the above embodiments, the battery device being used to store electrical energy.

[0038] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0039] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0040] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application; Figure 2 This is a schematic diagram of the structure of a battery device according to some embodiments of this application; Figure 3 This is an exploded structural diagram of a battery cell according to some embodiments of this application; Figure 4 This is a schematic structural diagram of the first housing from one perspective of some embodiments of this application; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure along the AA direction; Figure 6 This is a structural schematic diagram of the first housing from another perspective of some embodiments of this application; Figure 7 This is a schematic diagram of the support frame structure for some embodiments of this application.

[0041] Explanation of reference numerals in the attached figures: 1000, vehicles; 100. Battery assembly; 200. Controller; 300. Motor; 10. Housing; 11. First housing; 111. Support frame; 1111. Air injection valve; 1112. Mounting port; 1113. Connecting part; 11131. Connecting hole; 1114. Mounting hole; 1115. Air injection hole; 1116. Hollowed-out part; 112. Insulating component; 1121. Insulating covering layer; 1122. Insulating connecting shell; 11221. Bottom wall; 11222. Side wall; 11223. Second receiving cavity; 12. Second housing; 20. Battery cell; 21. End cap; 211. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab. Detailed Implementation

[0042] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0044] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0047] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0048] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0049] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0050] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0051] The casing of a battery device is usually made of rigid materials, such as aluminum alloy castings or extruded profiles welded together. The cavity structure or profile frame formed by the casting process is then welded and assembled to form the main body that supports the battery cells. However, because the casing uses a lot of material and the rigid material is heavy, the overall weight of the battery device is large, which is not conducive to the lightweight design of the product.

[0052] Based on the above considerations, to address the issue of excessive material usage and weight in battery packs due to the common practice of manufacturing battery pack housings using aluminum alloy castings or extruded profiles, this application designs a battery pack housing divided into a first housing and a second housing. The second housing covers the first housing, forming a sealed cavity between them, within which individual battery cells are housed. The second housing includes an elastic body, and the sealed cavity is filled with gas at a pressure higher than standard atmospheric pressure, allowing the elastic body to expand elastically to a predetermined shape. This technical solution reduces the amount of rigid material used in the housing, eliminating the need for extensive thickening of metal plates and dense reinforcing ribs to maintain structural strength, thus reducing the housing's weight and meeting the lightweight design requirements of battery packs. Furthermore, the housing design can adapt to various battery pack installation spaces and effectively resists external impacts through the gas filling and elastic components.

[0053] The battery device disclosed in this application can be used, but is not limited to, in electrical equipment or energy storage devices such as vehicles, ships, or aircraft. A power system for such electrical equipment or energy storage device can be constructed using the battery device disclosed in this application, which helps to reduce the overall weight of the battery device and facilitates meeting the lightweight design requirements of the product.

[0054] 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.

[0055] This application also provides an energy storage device that uses a battery device as a power source. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0056] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0057] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0058] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0059] Please refer to Figures 2 to 3 This application provides a battery device 100, including a housing 10 and a battery cell 20. Specifically, the housing 10 includes a first housing 11 and a second housing 12, with the second housing 12 covering the first housing 11 and defining a sealed cavity between the second housing 12 and the first housing 11; the battery cell 20 is housed within the sealed cavity; wherein, the second housing 12 includes an elastomer, the sealed cavity is filled with gas, the pressure inside the sealed cavity is higher than the ambient pressure outside the housing 10, forming a pressure difference, and the pressure difference causes the elastomer to elastically expand to a preset shape.

[0060] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing and battery cells 20, with the battery cells 20 housed within the housing. The housing 10 provides space for the battery cells 20, and the housing 10 can adopt various structures.

[0061] In some embodiments, the second housing 12 can be a hollow structure with one open end, and the first housing 11 can be a plate-like structure. The first housing 11 covers the open side of the second housing 12, so that the first housing 11 and the second housing 12 together define an accommodating space. Alternatively, both the first housing 11 and the second housing 12 can be hollow structures with one open side, with the open side of the first housing 11 covering the open side of the second housing 12. Of course, the housing formed by the first housing 11 and the second housing 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0062] As an example, the first box 11 is a tray assembly, and the second box 12 is a cover that fits over the first box 11.

[0063] Understandably, in this embodiment, the accommodating space defined by the first housing 11 and the second housing 12 is a closed, sealed cavity used to accommodate the battery cell 20 and fill it with gas.

[0064] As an example, the ambient pressure outside the enclosure is standard atmospheric pressure, which is the air pressure at sea level under standard atmospheric pressure conditions. The pressure of the gas filling the enclosure 10 is greater than standard atmospheric pressure, thus creating a pressure difference between the inside and outside of the enclosure 10.

[0065] As an example, an elastomer is a sheet-like or membrane-like component that possesses tensile and springback deformation energy.

[0066] As an example, the preset shape can be a cylinder, a cuboid, or other shapes. For instance, if the elastomer expands and deforms into a cuboid shape, the elastomer can be configured with four corners that have a smaller elastic deformation capacity. The area between the four corners of the elastomer is flat when not under air pressure. After being inflated in the box, the area between the four corners expands evenly under the internal pressure until it is flat and can be shaped into a cuboid.

[0067] In addition, the second box 12 after inflation has a unique shape adaptive energy. When the box is not filled with gas, the elastomer is flat and not subjected to air pressure, so it can be stuffed into a narrow space with a preset shape (such as the cavity of a robot joint arm). After the box 10 is filled with gas, the elastomer expands elastically and fits the inner wall of the joint arm cavity, making it suitable for special application scenarios where space is limited or irregular spaces need to be filled.

[0068] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 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 also housed within the housing 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 20.

[0069] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0070] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit constituting the battery device 100. For example... Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0071] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, giving battery cell 20 higher structural strength and improved safety performance. Functional components such as electrode terminals 211 can be provided on end cap 21. Electrode terminals 211 can be used for electrical connection with electrode assembly 23 for outputting or inputting electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating protective element may also be provided on the inner side of the end cap 21. The insulating protective element can be used to isolate the electrical connection portion 1113 within the housing from the end cap 21 to reduce the risk of short circuit. For example, the insulating protective element may be made of plastic, rubber, etc.

[0072] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The housing 22 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0073] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 211 to form a current loop.

[0074] By setting the second chamber 12 of the housing 10 as an elastomer and filling the sealed cavity defined between the first chamber 11 and the second chamber 12 with gas, the pressure inside the sealed cavity is higher than the ambient pressure outside the housing 10, so that a pressure difference is formed between the inside and outside of the housing 10. This pressure difference can drive the elastomer to expand elastically to a preset shape and generate prestress. The generated prestress provides the second chamber 12 with impact stiffness. When the housing 10 is subjected to external impact or compression load, the elastomer can undergo elastic deformation as the gas inside the housing 10 is compressed. The external impact energy is consumed by the gas compression process. After the external force is removed, the elastomer can recover its initial expanded shape under the drive of the gas pressure inside the housing 10. Meanwhile, since the second housing 12 abandons the traditional rigid housing formed by aluminum alloy casting or extruded profile welding, the overall structure of the housing 10 does not need to be thickened with a large amount of metal plates and dense reinforcing ribs to maintain protective strength. Therefore, it can reduce the amount of raw materials used in the overall housing 10 and reduce the weight of the housing 10, thus adapting to the lightweight design requirements of the battery device 100.

[0075] According to some embodiments of this application, the elastomer includes an elastic film.

[0076] As an example, an elastic film is a continuous, monolithic film that is elastic and flexible, capable of deforming when subjected to external forces and returning to its original shape after the external forces are removed.

[0077] By configuring the elastomer as an elastic film structure, the thinness and lower weight per unit area of ​​the elastic film contribute to further reducing the overall weight of the second housing 12, resulting in a more significant weight reduction effect. Furthermore, the elastic film possesses a continuous and complete sealing interface, making it easier to form a continuous and uninterrupted sealing structure when connected with the first housing 11, thus facilitating the maintenance of stable air pressure within the sealed cavity.

[0078] According to some embodiments of this application, the elastic film includes one of thermoplastic polyurethane film, thermoplastic polyolefin film, and polyamide film.

[0079] Thermoplastic polyurethane film is a thermoplastic polymer material polymerized from polyols and diisocyanates. It is an elastic film produced by blow molding, casting or calendering processes and has properties such as high elasticity, wear resistance and tear resistance.

[0080] Thermoplastic polyolefin film is an elastic film polymerized from rubber and polyolefin resin, which has high weather resistance.

[0081] Polyamide film, also known as nylon, is a polar polymer that is odorless and tasteless, and has high strength, rigidity, toughness and impact strength.

[0082] In some embodiments, the elastic film may also be formed by laminating and bonding, pressing or thermoplastic welding at least two of thermoplastic polyurethane film, thermoplastic polyolefin film and polyamide film.

[0083] Thermoplastic polyurethane film, thermoplastic polyolefin film, and polyamide film all possess high tensile strength, allowing for uniform stretching and expansion during inflation without the risk of localized tearing or damage. Among them, thermoplastic polyurethane film exhibits better low-temperature toughness, thermoplastic polyolefin film demonstrates superior aging resistance, and polyamide film demonstrates stronger resistance to high temperatures and electrolyte corrosion. The appropriate type can be flexibly selected based on the actual operating conditions of the battery device 100. Furthermore, all three types of films are compatible with both thermoplastic welding and adhesive bonding sealing processes, allowing for matching with different production line processing conditions.

[0084] According to some embodiments of this application, the thickness of the elastic film is set in the range of 0.5mm-2.5mm.

[0085] As an example, the thickness of the elastic film is set uniformly in all regions.

[0086] By setting the thickness of the elastic film within the range of 0.5mm-2.5mm, the overall thickness of the elastic film is relatively small, which reduces the amount of material used in the second housing 12 and further reduces the weight of the housing. Within this thickness range, the elastic film can balance tensile strength and deformation capacity, exhibiting good puncture and tear resistance. After inflation, it can expand uniformly without incomplete expansion or uneven bulging due to excessive wall thickness. It can also withstand the loads generated by minor impacts during assembly and use, making it suitable for the operating conditions of conventional battery devices 100.

[0087] According to some embodiments of this application, the gas includes compressed air or an inert gas; the gas pressure is set in the range of 0.2 MPa to 0.5 MPa.

[0088] As is understandable, compressed air is air compressed by an external force. Inert gases are gases that are difficult to react chemically, such as helium, neon, argon, krypton, and xenon.

[0089] As an example, the pressure of the gas inside the chamber can be 0.2 MPa, 0.3 MPa, 0.45 MPa, 0.5 MPa, etc.

[0090] Compressed air and inert gas are used as filling media to fill the sealed cavity. The gas raw materials are readily available, which can reduce the production cost and subsequent gas replenishment and maintenance cost of the battery device 100. In addition, the chemical properties of compressed air and inert gas are stable, which can slow down the aging rate of the elastic membrane and help extend the service life of the enclosure.

[0091] By setting the gas pressure within the range of 0.2MPa-0.5MPa, sufficient prestress is generated on the elastic membrane inside the housing, enabling the membrane to achieve stable equivalent stiffness. This allows the protection requirements of the battery cell 20 to be met without thickening the membrane. At the same time, the gas pressure is not too high, reducing the possibility of fatigue deformation caused by long-term tensile loads on the membrane.

[0092] Please refer to Figure 2 , Figure 4 and Figure 5 , Figure 6 and Figure 7 , Figure 4 This is a schematic structural diagram of the first housing from one perspective of some embodiments of this application; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure along the AA direction; Figure 6 This is a structural schematic diagram of the first housing from another perspective of some embodiments of this application; Figure 7 This is a schematic diagram of the support frame structure according to some embodiments of this application. According to some embodiments of this application, the first housing 11 includes a support frame 111 and an insulating member 112. The support frame 111 is used to support the battery cell 20. The insulating member 112 includes an insulating connecting shell 1122, which is disposed on the side of the support frame 111 facing the second housing 12. The insulating connecting shell 1122 is sealed to an elastomer and forms a sealed cavity between itself and the elastomer.

[0093] As an example, the support frame 111 is a metal frame, such as a metal frame made of stainless steel, aluminum alloy, magnesium alloy, or other metal profiles. The support frame 111 includes multiple crossbeams and multiple longitudinal beams, and multiple open sections 1116 can be formed between the crossbeams and longitudinal beams.

[0094] As an example, the insulating element 112 can be a non-metallic skin, a plastic part, or a plastic component. It is understood that the insulating connection shell 1122 can be part of the insulating element 112 and can be injection molded.

[0095] The support frame 111 serves as a stable load-bearing substrate, providing reliable stress support for the battery cell 20. The insulating connecting shell 1122 is arranged on the side of the support frame 111 facing the second housing 12, forming an insulating layer that isolates the battery cell 20 from the support frame 111. This lengthens the insulation path from the battery cell 20 to the support frame 111, improving insulation protection in high-voltage applications. Simultaneously, the insulating connecting shell 1122 facilitates docking and sealing with an elastomer, allowing the two to cooperate to enclose a gas-filled sealed cavity, facilitating the stable maintenance of the gas pressure within the sealed cavity.

[0096] Please refer to Figure 5 and Figure 6 According to some embodiments of this application, the elastomer surrounds a first receiving cavity, and the insulating connecting shell 1122 includes a bottom wall 11221 and a side wall 11222. The bottom wall 11221 covers the support frame 111, and the side wall 11222 surrounds the periphery of the bottom wall 11221 and forms a second receiving cavity 11223 between the side wall 11221 and the bottom wall 11221. The side wall 11222 is sealed to the elastomer, so that the first receiving cavity and the second receiving cavity 11223 together form a closed cavity.

[0097] Understandably, the first receiving cavity is a hollow cavity with an opening formed by the elastic body itself.

[0098] As an example, the bottom wall 11221 is a flat plate structure, and the side wall 11222 is a surrounding plate structure formed by extending around the bottom wall 11221 toward the direction close to the second box 12. The bottom wall 11221 and the side wall 11222 can be connected by an arc transition.

[0099] As an example, the end face of the side wall 11222 facing away from the bottom wall 11221 is disposed opposite to the end face of the second housing 12 facing the bottom wall 11221 and is bonded or thermoplastic welded together. Alternatively, the end face of the side wall 11222 protrudes towards the second housing 12 to form an edge, the edge covering the outer periphery of the second housing 12 and bonded or thermoplastic welded together with the second housing 12.

[0100] The bottom wall 11221 of the insulating connecting shell 1122 covers the support frame 111 and can work with the support frame 111 to stably support the battery cell 20, thereby further increasing the creepage distance and electrical clearance between the battery cell 20 and the support frame 111, so as to further reduce the risk of short circuit due to conductive contact between the battery cell 20 and the support frame 111. The end of the side wall 11222 of the insulating connecting shell 1122 is sealed with the elastomer, so that the second receiving cavity 11223 defined by the insulating connecting shell 1122 can be surrounded by the first receiving cavity enclosed by the elastomer to form a sealed cavity, and facilitate the uniform filling of gas into the sealed cavity.

[0101] Please refer to Figure 4 and Figure 5 According to some embodiments of this application, the insulating member 112 further includes an insulating covering layer 1121, which covers the surface of the support frame 111 and is connected to the insulating connecting shell 1122.

[0102] As an example, the insulating covering layer 1121 can be integrally injection molded with the insulating connecting shell 1122, or it can be bonded, pressed, or thermoplastic welded to the insulating connecting shell 1122. The insulating covering layer 1121 can be applied to the outer surface of the support frame 111 via injection molding.

[0103] As an example, the thickness of the insulating covering layer 1121 can be set in the range of 2 mm to 3 mm.

[0104] By covering the surface of the support frame 111 with an insulating covering layer 1121, the risk of conductive contact between the support frame 111 and external electrical components is reduced. The insulating covering layer 1121 is connected to the insulating connecting shell 1122, which further increases the creepage distance and electrical clearance between the battery cell 20 and the support frame 111, thereby further reducing the risk of short circuit due to conductive contact between the battery cell 20 and the support frame 111.

[0105] According to some embodiments of this application, the insulating connecting shell 1122 is integrally connected with the insulating covering layer 1121.

[0106] As an example, the insulating connection shell 1122 and the insulating covering layer 1121 are integrally injection molded.

[0107] The insulating connecting shell 1122 and the insulating covering layer 1121 are integrally formed, eliminating the need for additional connectors. This helps reduce the number of supporting parts, simplifies the assembly process of the first housing 11, and reduces the amount of metal accessories used, thus optimizing the product's lightweight effect. Furthermore, the absence of assembly seams at the joint reduces the channels for high-pressure gas to escape from the seams, which helps extend the time the gas maintains stable pressure within the sealed cavity.

[0108] According to some embodiments of this application, the sidewall 11222 is bonded to the elastomer; or, the sidewall 11222 is thermoplastically welded to the elastomer.

[0109] The sidewall 11222 can be bonded to the elastomer by an adhesive layer. For example, the adhesive layer can be an elastomer adhesive such as polyurethane glue or silicone glue, with a thickness of 0.3 mm to 0.5 mm. After curing, it forms a flexible seal that allows for a certain degree of deformation without cracking.

[0110] Thermoplastic welding connection involves heating the sidewall 11222 and the elastomer to melt and connect their contact surfaces into a single unit.

[0111] The side wall 11222 can be bonded to the second housing 12 via an adhesive layer. This bonding method is simple and quick, improving assembly efficiency and accommodating elastomers of different materials. Alternatively, the side wall 11222 can be thermoplastic welded to the second housing 12. This involves melting the edges of the side wall 11222 and the elastomer at high temperatures, forming a gapless and continuous sealing interface. Under air pressure, this interface generates a continuous self-tightening sealing effect. Even if microscopic gaps exist, the air pressure will force the elastomer towards the sealing surface to fill the gaps. This provides higher sealing reliability than traditional flange seals that rely on bolt preload, improving the reliability and stability of the connection between the side wall 11222 and the elastomer. Both connection methods reduce the risk of gaps between the side wall 11222 and the elastomer edges, thus minimizing the risk of gas diffusion from inside the housing.

[0112] According to some embodiments of this application, an adhesive layer is coated on the side of the bottom wall 11221 facing the second housing 12, and the battery cell 20 is bonded to the bottom wall 11221 through the adhesive layer.

[0113] As an example, the adhesive layer is a glue layer, and the glue layer is an insulating glue layer.

[0114] The adhesive layer can smoothly adhere and fix the battery cell 20 to the surface of the bottom wall 11221, reducing the risk of lateral or longitudinal displacement of the battery cell 20 under vibration conditions. In addition, the adhesive layer fills the space between the metal shell 22 of the battery cell 20 and the insulating bottom wall 11221, which can further increase the creepage distance between the battery cell 20 and the support frame 111, thereby improving the stability of the battery device 100 under high voltage conditions.

[0115] According to some embodiments of this application, the thickness of the adhesive layer is set in the range of 0.5mm-1mm; the thickness of the bottom wall 11221 is set in the range of 2mm-4mm.

[0116] Understandably, the thickness of the adhesive layer is the thickness of the adhesive after it has cured.

[0117] By setting the thickness of the adhesive layer within the range of 0.5mm-1mm, an adhesive layer with a thickness of 0.5mm-1mm can form a continuous and complete adhesive surface, which can stably transmit the self-weight and vibration load of the battery cell 20. At the same time, the adhesive layer is relatively thin, so it will not increase the overall thickness and weight of the casing too much.

[0118] By setting the thickness of the bottom wall 11221 in the range of 2mm-4mm, the bottom wall 11221 with a thickness of 2mm-4mm can facilitate the transmission of load-bearing capacity, so as to evenly distribute the weight of the battery cell 20. At the same time, it helps to achieve the lightweight design of the product and improves the stability of the insulation between the battery cell 20 and the support frame 111.

[0119] Please refer to Figure 4 and Figure 7 According to some embodiments of this application, the box body is provided with an air injection hole 1115, which is connected to the sealed cavity, and the air injection hole 1115 is provided with an air injection valve 1111.

[0120] As an example, an air injection hole 1115 is provided in the first housing 11. Specifically, the air injection hole 1115 is provided in the support frame 111 and extends through the support frame 111 and the bottom wall 11221 along the thickness direction of the support frame 111.

[0121] As an example, the air injection valve 1111 is an air nozzle. The valve body of the air injection valve 1111 is fixed inside the air injection hole 1115 and sealed to the inner wall of the air injection hole 1115. The valve core extends through the insulating coating layer 1121 to the outside of the housing for connecting to an air source for inflation. During inflation, the appearance of the elastomer is monitored until the elastomer expands uniformly without any local weak points or excessive stretching. The valve is closed after the set pressure is reached. Under air pressure, the inflated elastomer exhibits a stiff arc or dome-shaped appearance. The prestress generated by the internal air pressure gives the elastomer sufficient equivalent stiffness to resist external light touches and impacts.

[0122] As an example, the air injection valve 1111 has a built-in automatic sealing and pressure-maintaining component.

[0123] By installing an injection valve 1111 inside the injection port 1115 of the housing, gas can be uniformly injected into the sealed cavity during the assembly stage to allow the elastomer to expand elastically to a preset shape. Furthermore, if the air pressure inside the sealed cavity decreases after long-term use of the battery device 100, the injection valve 1111 can be used to replenish the gas, maintaining the expanded and molded state of the elastomer and extending the effective protection period of the housing.

[0124] Please refer to Figure 4 and Figure 7According to some embodiments of this application, the first housing 11 is provided with an installation port 1112, which is connected to a sealed cavity and is used to install a connector; the periphery of the first housing 11 is provided with a connecting part 1113, which is provided with a connecting hole 11131 and is used to connect with an external structural component.

[0125] The connector is used to connect high-voltage components such as the battery device 100, motor controller, and charging system, to carry out high-voltage and high-current power transmission, and to deliver the power of the battery device 100 to various components in the electrical equipment through different electrical circuits.

[0126] As an example, the first housing 11 is also provided with multiple mounting holes 1114, which penetrate the first housing 11. After the high-voltage connector is installed in the mounting port 1112, it is fixed by fasteners passing through the mounting holes 1114. The fasteners and the mounting port 1112, as well as the high-voltage connector and the mounting port 1112, can be sealed by sealing rings.

[0127] As an example, the connecting part 1113 is provided on the periphery of the support frame 111. There can be multiple connecting parts 1113, which are spaced apart circumferentially along the first housing 11. The connecting part 1113 can be a protrusion or a boss, and the external structural component can be a vehicle floor or a fixed bracket.

[0128] By providing a connection port in the first housing 11, the connection port can be adapted to the assembly connection of the connector. The connector is installed in the mounting port 1112 and electrically connected to the battery cell 20 inside the housing. This helps to simplify the internal structural layout of the housing, improve the space utilization rate inside the housing, and increase the energy density of the battery device 100.

[0129] By providing connection holes 11131 on the periphery of the first housing 11, the battery device 100 can be easily assembled and fixed with the vehicle chassis or other external structural components without the need for additional adapter metal fittings, which helps to reduce the amount of metal parts used.

[0130] An embodiment of the second aspect of this application provides an electrical device including the battery device 100 in the above embodiments, the battery device 100 being used to provide electrical energy.

[0131] The electrical equipment provided in the second aspect of this application includes the battery device 100 of any one of the first aspect embodiments, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0132] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device 100 in the above embodiments, the battery device 100 being used to store electrical energy.

[0133] The energy storage device provided in the third aspect embodiment of this application includes the battery device 100 of any one of the second aspect embodiments, and therefore has the technical effects of any of the above embodiments, which will not be repeated here.

[0134] Please refer to Figures 2 to 6 According to some embodiments of this application, this application provides a battery device 100, including a housing 10 and a battery cell 20. The housing 10 includes a first housing 11 and a second housing 12, the second housing 12 covering the first housing 11 and defining a sealed cavity between the second housing 12 and the first housing 11; the battery cell 20 is housed in the sealed cavity; wherein, the second housing 12 includes an elastomer, the sealed cavity is filled with gas, the pressure inside the sealed cavity is higher than the ambient pressure outside the housing 10, and the gas can cause the elastomer to elastically expand to a preset shape, the first housing 11 includes a support frame 111 and an insulating member 112, the support frame 111 being used to support... The battery cell 20 and the insulating component 112 include an insulating covering layer 1121 and an insulating connecting shell 1122. The insulating covering layer 1121 covers the surface of the support frame 111. The insulating connecting shell 1122 is located on the side of the support frame 111 facing the second housing 12 and is connected to the insulating covering layer 1121. The insulating connecting shell 1122 includes a bottom wall 11221 and a side wall 11222 surrounding the bottom wall 11221. The side wall 11222 is bonded to an elastomer or thermoplastic welded to it.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure includes a first enclosure and a second enclosure, wherein the second enclosure covers the first enclosure and defines a sealed cavity between the second enclosure and the first enclosure; The battery cell is housed within the sealed cavity; The second housing includes an elastomer, and the sealed cavity is filled with gas. The pressure inside the sealed cavity is higher than the ambient pressure outside the housing, forming a pressure difference. The pressure difference causes the elastomer to elastically expand to a preset shape.

2. The battery device according to claim 1, characterized in that, The elastomer includes an elastic film.

3. The battery device according to claim 2, characterized in that, The elastic film includes one of thermoplastic polyurethane film, thermoplastic polyolefin film, and polyamide film.

4. The battery device according to claim 2, characterized in that, The thickness of the elastic film is set in the range of 0.5mm-2.5mm.

5. The battery device according to any one of claims 1-4, characterized in that, The gas includes compressed air or an inert gas; And / or, the pressure of the gas is set in the range of 0.2 MPa to 0.5 MPa.

6. The battery device according to any one of claims 1-4, characterized in that, The first housing includes a support frame and an insulating component. The support frame is used to support the battery cell, and the insulating component includes an insulating connecting shell, which is disposed on the side of the support frame facing the second housing. The insulating connecting shell is sealed to the elastomer, and a sealed cavity is formed between the shell and the elastomer.

7. The battery device according to claim 6, characterized in that, The elastomer surrounds a first receiving cavity. The insulating connecting shell includes a bottom wall and a side wall. The bottom wall covers the supporting frame. The side wall surrounds the periphery of the bottom wall and forms a second receiving cavity between the side wall and the bottom wall. The side wall is sealed to the elastomer, so that the first receiving cavity and the second receiving cavity together form the sealed cavity.

8. The battery device according to claim 6, characterized in that, The insulating component further includes an insulating covering layer, which covers the surface of the support frame and is connected to the insulating connecting shell.

9. The battery device according to claim 8, characterized in that, The insulating connecting shell is integrally connected to the insulating covering layer.

10. The battery device according to claim 7, characterized in that, The sidewall is bonded to the elastomer; Alternatively, the sidewall is thermoplastically welded to the elastomer.

11. The battery device according to claim 7, characterized in that, An adhesive layer is applied to the side of the bottom wall facing the second housing, and the battery cell is bonded to the bottom wall through the adhesive layer.

12. The battery device according to claim 11, characterized in that, The thickness of the adhesive layer is set in the range of 0.5mm-1mm; And / or, the thickness of the bottom wall is set in the range of 2mm-4mm.

13. The battery device according to any one of claims 1-4, characterized in that, The housing is provided with an air injection hole, which is connected to the sealed cavity, and the air injection hole is provided with an air injection valve.

14. The battery device according to any one of claims 1-4, characterized in that, The first housing is provided with an installation port, which is connected to the sealed cavity and is used to install a connector; And / or, the periphery of the first housing is provided with a connecting part, the connecting part is provided with a connecting hole, the connecting hole is used to connect with an external structural component.

15. An electrical appliance, characterized in that, The electrical equipment includes a battery device as described in any one of claims 1-13, the battery device being used to provide electrical energy.

16. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1-13, the battery device being used to store electrical energy.

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