Battery apparatus and electric apparatus

Abstract

A battery apparatus and an electric apparatus. The battery apparatus comprises a battery unit and connecting members. The battery unit comprises a solid-state battery cell and a plurality of pressing plates. The plurality of pressing plates are stacked in a first direction. The solid-state battery cell is clamped between adjacent pressing plates. The plurality of pressing plates of the battery unit are fixedly connected by means of the connecting members.

Description

Battery devices and electrical appliances Cross-reference to related applications

[0001] This application claims priority to Chinese patent application 202411707155.9 entitled “Battery Device and Power Consumption Device”, filed on November 26, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0003] Solid-state batteries are a type of battery that uses a solid material as an electrolyte. Solid-state batteries have advantages such as high charging efficiency, high energy density, and low risk of combustion and explosion, making them highly valuable for research.

[0004] In the development of battery technology, how to improve the space utilization of solid-state batteries in electronic devices has always been a research direction in battery technology. Summary of the Invention

[0005] This application provides a battery device and an electrical device that can improve the space utilization of the battery device in the electrical device.

[0006] In a first aspect, this application provides a battery device. The battery device includes a battery cell, comprising a solid-state battery cell and a plurality of pressure plates, the plurality of pressure plates being stacked along a first direction, with the solid-state battery cell sandwiched between adjacent pressure plates. A connector securely connects the plurality of pressure plates of the battery cell.

[0007] In the above scheme, a pressure plate is installed to ensure the operation of the solid-state battery cells. Simultaneously, by setting up battery cells, the number and arrangement of the battery cells can be adjusted according to the space available for storing the battery devices in the electrical device, thereby improving the space utilization rate of the battery devices within the electrical device.

[0008] In some embodiments, the battery cell includes a plurality of solid-state battery cells, with at least one solid-state battery cell sandwiched between adjacent pressure plates.

[0009] In the above scheme, the above settings facilitate the adjustment of the number of solid-state battery cells between adjacent pressure plates, thereby improving the applicability of the battery cells.

[0010] In some embodiments, the solid-state battery cells between at least partially adjacent pressure plates of the plurality of pressure plates have different dimensions along a first direction.

[0011] In the above scheme, the above settings are beneficial to adjust the overall size of the battery device along the first direction according to the storage space of different battery devices. At the same time, it is beneficial to improve thermal management. Solid-state battery cells of different sizes can have different heat dissipation characteristics. Through reasonable design, the uniformity of heat distribution of the entire battery device can be improved, and the possibility of thermal runaway caused by local overheating can be reduced.

[0012] In some embodiments, the solid-state battery cells between at least partially adjacent pressure plates in a plurality of pressure plates have different dimensions along a second direction, and the first and second directions intersect.

[0013] In the above scheme, combined with the aforementioned implementation method, it is possible to make more flexible use of three-dimensional space for battery cells with different sizes in two directions, maximize the volume utilization of the battery device, improve the overall energy density, and at the same time better adapt to the storage space of irregular or complex shaped battery devices, thereby improving the space utilization of the power device.

[0014] In some embodiments, the battery cell includes a plurality of battery cells arranged side by side along a second direction, wherein the first direction and the second direction intersect.

[0015] The above scheme facilitates modular maintenance, allowing for the individual replacement of faulty battery cells, reducing the impact on the entire battery device. Furthermore, it enables standardized design, simplifying the production and maintenance process.

[0016] In some embodiments, at least some of the battery cells in the plurality of battery cells include different numbers of pressure plates; and / or, at least some of the battery cells in the plurality of battery cells include different numbers of solid-state battery cells.

[0017] In the above scheme, designing the number of pressure plates or solid-state battery cells of at least some of the battery cells to be different can improve the utilization rate of irregular or limited space for storing battery devices. At the same time, different battery cells can be designed as battery cells with different performance according to different needs. For example, some battery cells are high-energy-density battery cells, while others are high-power output battery cells, thereby improving the flexibility of battery cell arrangement within the battery device.

[0018] In some embodiments, multiple pressure plates in adjacent battery cells are staggered along a first direction.

[0019] In the above scheme, the above settings help to reduce the gaps between battery cells, improve the space utilization of irregular or complex battery storage space, and at the same time enable faulty battery cells to be replaced individually, thereby reducing the difficulty of disassembling and assembling faulty battery cells and improving maintenance efficiency.

[0020] In some embodiments, in two adjacent battery cells, at least one pressure plate of one battery cell is arranged side by side and integrally formed with at least one pressure plate of the other battery cell.

[0021] In the above solution, the possibility of loosening between pressure plates can be reduced through integrated design, the overall structural stability of the battery device can be improved, the assembly steps can be simplified, production efficiency can be increased, and manufacturing costs can be reduced.

[0022] In some embodiments, there are multiple connectors, and at least one connector connects the pressure plates of adjacent battery cells.

[0023] In the above scheme, the above settings help to reduce the number of connectors, improve the connection stability between multiple battery cells, reduce the distance between multiple battery cells, improve the integration of the battery device, and reduce the overall size of the battery device.

[0024] In some embodiments, the connector includes a connecting rod, and the pressure plate has a connecting hole, to which the connecting rod is connected.

[0025] In the above scheme, the above settings help to simplify the connection structure between the pressure plate and the connector, reduce manufacturing costs, and improve production efficiency.

[0026] In some embodiments, there are multiple connectors, which are disposed around the periphery of the solid-state battery cell.

[0027] In the above scheme, the above settings help to improve the uniformity of the force on the solid-state battery cell, reduce the possibility of deformation of the solid-state battery cell due to excessive local force, improve the pull-out resistance of the battery cell, and reduce the possibility of the battery cell separating under the action of external force.

[0028] In some embodiments, the side of the pressure plate facing the solid-state battery cell has a recess, and at least a portion of the solid-state battery cell is disposed within the recess.

[0029] In the above scheme, it is beneficial to reduce the size of the battery cell along the first direction, thereby reducing the overall size of the battery device and increasing the energy density of the battery device.

[0030] Secondly, embodiments of this application provide an electrical device, including the battery device in any of the foregoing embodiments, the battery device being used to provide electrical energy.

[0031] 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, specific embodiments of this application are given below. Attached Figure Description

[0032] 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:

[0033] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this application;

[0034] Figure 2 is an exploded structural diagram of a battery device provided in an embodiment of this application;

[0035] Figure 3 is a schematic diagram of the structure of a solid-state battery cell provided in an embodiment of this application;

[0036] Figure 4 is a structural schematic diagram of another battery device provided in an embodiment of this application;

[0037] Figure 5 is a schematic diagram of another battery device provided in an embodiment of this application;

[0038] Figure 6 is a schematic diagram of another battery device provided in an embodiment of this application;

[0039] Figure 7 is a schematic diagram of another battery device provided in an embodiment of this application;

[0040] Figure 8 is a schematic diagram of another battery device provided in an embodiment of this application;

[0041] Figure 9 is a schematic diagram of another battery device provided in an embodiment of this application;

[0042] Figure 10 is a schematic diagram of another battery device provided in an embodiment of this application;

[0043] Figure 11 is a schematic diagram of another battery device provided in an embodiment of this application;

[0044] Figure 12 is a schematic diagram of another battery device provided in an embodiment of this application;

[0045] Figure 13 is a schematic diagram of another battery device provided in an embodiment of this application;

[0046] Figure 14 is a schematic diagram of another battery device provided in an embodiment of this application;

[0047] Figure 15 is a schematic diagram of another battery device provided in an embodiment of this application;

[0048] Figure 16 is a schematic diagram of another battery device provided in an embodiment of this application.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1000, vehicles;

[0051] 100. Battery assembly; 200. Control system; 300. Motor; 400. Housing; 410. First housing section; 420. Second housing section; 430. Receiving section; 500. Battery module;

[0052] 10. Battery cell; 11. Solid-state battery cell; 12. Pressure plate; 121. Connecting hole; 122. Recess;

[0053] 20. Connectors;

[0054] L1, first battery cell; L2, second battery cell;

[0055] X, the first direction; Y, the second direction. Detailed Implementation

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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).

[0062] 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.

[0063] 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.

[0064] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0065] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar.

[0066] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0067] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0068] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0069] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0070] 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.

[0071] In some embodiments, the battery device may be an energy storage device. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0072] As an important part of the future battery field, solid-state battery cells will be used not only in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles and electric cars, as well as in military equipment and aerospace, with further research and development.

[0073] Because the characteristics of solid-state battery cells differ significantly from those of traditional liquid batteries, solid-state battery cells require pressurization during operation. This necessitates a dedicated pressurization device in the design of solid-state battery modules. Traditional liquid batteries, on the other hand, not only lack pressurization devices but also require space for expansion to alleviate pressure, making their application scenarios entirely different from those of solid-state battery cells.

[0074] In many electrical devices, the space used to store batteries is not a regular space, resulting in some space not being filled by batteries, leading to low space utilization and limiting the total battery life of the electrical device.

[0075] To address the aforementioned technical problems, this application provides a technical solution that uses a pressure plate to ensure the operation of solid-state battery cells. Furthermore, by configuring battery cells, the number and arrangement of the battery cells can be adjusted according to the space available for storing the battery devices in the electrical device, thereby improving the space utilization rate of the battery devices within the electrical device.

[0076] The technical solutions described in this application are applicable to battery devices and electrical devices using battery devices. Electrical devices include, for example, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft. Electric toys include, for example, stationary or mobile electric toys, specifically, game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include, for example, metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, specifically, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0077] The battery cells described in this application are not limited to the electrical devices described above, but for the sake of brevity, the following embodiments are all illustrated using electric vehicles as an example.

[0078] Please refer to Figure 1, which is a schematic diagram of the structure of a vehicle provided in an embodiment of this application.

[0079] 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 can be installed inside vehicle 1000, specifically, for example, at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, it can serve as the operating power source for vehicle 1000. Vehicle 1000 may also include a control system 200 and a motor 300. The control system 200, for example, controls the battery device to supply power to the motor 300. The battery device can be used for starting and navigating vehicle 1000. Of course, the battery device 100 can also be used to drive vehicle 1000, replacing or partially replacing gasoline or natural gas as the driving force for vehicle 1000.

[0080] Figure 2 is an exploded structural diagram of a battery device provided in an embodiment of this application. As shown in Figure 2, the battery device 100 includes a housing 400 and a battery cell (not shown in the figure), with the battery cell housed within the housing 400.

[0081] The housing 400 is used to house individual battery cells, and the housing 400 can have various structures. In some embodiments, the housing 400 may include a first housing portion 410 and a second housing portion 420, which overlap each other, and together define a receiving portion 430 for housing the individual battery cells. The second housing portion 420 may be a hollow structure with one end open, and the first housing portion 410 may be a plate-like structure, with the first housing portion 410 covering the open side of the second housing portion 420 to form a housing with the receiving portion 430; alternatively, both the first housing portion 410 and the second housing portion 420 may be hollow structures with one side open, with the open side of the first housing portion 410 covering the open side of the second housing portion 420 to form a housing 400 with the receiving portion 430. Of course, the first housing portion 410 and the second housing portion 420 can have various shapes, such as cylinders, cuboids, etc.

[0082] In the battery device 100, there can be multiple battery cells. These multiple battery cells can be connected in series, parallel, or in a hybrid configuration. A hybrid configuration means that multiple battery cells are connected in both series and parallel connections. Multiple battery cells can be directly connected in series, parallel, or in a hybrid configuration, and then the entire assembly of these multiple battery cells is housed within the housing 400. Alternatively, multiple battery cells can first be connected in series, parallel, or in a hybrid configuration to form a battery module 500, and then these battery modules 500 can be connected in series, parallel, or in a hybrid configuration to form a whole, which is then housed within the housing 400.

[0083] Figure 3 is a schematic diagram of a solid-state battery cell provided in an embodiment of this application. Figure 4 is a schematic diagram of another battery device provided in an embodiment of this application. Figure 5 is a schematic diagram of yet another battery device provided in an embodiment of this application.

[0084] Please refer to Figures 3 to 5. This application embodiment provides a battery device 100. The battery device 100 includes a battery unit 10, including a solid-state battery cell 11 and a plurality of pressure plates 12. The plurality of pressure plates 12 are stacked along a first direction X, and the solid-state battery cell 11 is sandwiched between adjacent pressure plates 12. A connector 20 fixes the plurality of pressure plates 12 of the battery unit 10 together.

[0085] The battery device 100 includes battery units 10, which can serve as basic units. Multiple battery units 10 can be sequentially arranged along the second direction Y and / or a third direction to form battery devices 100 of different shapes. Alternatively, the number of battery units 10 may be only one. Optionally, the first direction X, the second direction Y, and the third direction intersect each other. Optionally, the first direction X, the second direction Y, and the third direction are perpendicular to each other.

[0086] Optionally, multiple battery cells 10 can be connected by connectors 20, or by bonding, snap-fitting, welding, or other methods, or they can be spaced apart.

[0087] Optionally, the battery device 100 may further include a housing 400, the shape of which may match the shape of the battery cells 10. For example, multiple solid-state battery cells 11 may be stacked in the battery cells 10, and the multiple battery cells 10 may be arranged adjacently such that the stacked shape is a cuboid, a polygon, or other shape, and the shape of the housing 400 may be a cuboid, a polygon, or other shape that matches the battery cells 10. Of course, the housing 400 may also be a regular shape.

[0088] Optionally, in a battery cell 10, the number of solid-state battery cells 11 may include one or more.

[0089] For example, a battery cell 10 includes a solid-state battery cell 11 and two pressure plates 12, with the solid-state battery cell 11 disposed between the two pressure plates 12.

[0090] For example, a battery cell 10 includes a plurality of solid-state battery cells 11 and a plurality of pressure plates 12, and one or more solid-state battery cells 11 may be disposed between two adjacent pressure plates 12. For example, a solid-state battery cell 11 may be disposed between two adjacent pressure plates 12, and a pressure plate 12 may be disposed between two adjacent solid-state battery cells 11, or two pressure plates 12 may be disposed.

[0091] Optionally, when there are multiple solid-state battery cells 11, the thickness, width, and length of the multiple solid-state battery cells 11 can be the same or different. For example, the thickness of some solid-state battery cells 11 may be greater than the thickness of another portion of solid-state battery cells 11. And / or, the width of some solid-state battery cells 11 may be greater than the width of another portion of solid-state battery cells 11. And / or, the length of some solid-state battery cells 11 may be greater than the length of another portion of solid-state battery cells 11.

[0092] Optionally, the thickness, width, and length of the plurality of pressure plates 12 may be the same or different. For example, the thickness of some of the pressure plates 12 may be greater than the thickness of another portion of the pressure plates 12. And / or, the width of some of the pressure plates 12 may be greater than the width of another portion of the pressure plates 12. And / or, the length of some of the pressure plates 12 may be greater than the length of another portion of the pressure plates 12.

[0093] Alternatively, the multiple pressure plates 12 may have the same shape or different shapes.

[0094] Optionally, the pressure applied to the solid-state battery cell 11 by the multiple pressure plates 12 can be the same or different.

[0095] Optionally, the pressure plate 12 can be reused as a heat exchange plate, such as a water-cooled plate.

[0096] Optionally, the pressure plate 12 can also be connected to the housing 400 of the battery device 100.

[0097] Optionally, the first direction X can be the thickness direction of the solid-state battery cell 11.

[0098] Alternatively, the connector 20 may be a rod-shaped structure, a plate-shaped structure, or other structures.

[0099] Optionally, the number of connectors 20 can be one or more.

[0100] Optionally, one connector 20 can connect multiple pressure plates 12. Alternatively, one connector 20 can connect two adjacent pressure plates 12. Optionally, one or more connectors 20 can be provided between two adjacent pressure plates 12.

[0101] Optionally, the connector 20 can be connected to the housing 400 of the battery device 100.

[0102] Optionally, the connector 20 can be reused as a heat exchange channel, which is connected to the heat exchange plate.

[0103] Optionally, the pressure plate 12 can be made of conductive material or insulating material. For example, if the pressure plate 12 is made of conductive material and connected to the grounding signal, the pressure plate 12 can serve as a shielding plate.

[0104] Optionally, the connector 20 can be made of conductive material or insulating material.

[0105] Alternatively, the connector 20 can fix multiple pressure plates 12 together by means of welding, bolting, bonding, snap-fitting, or embedded connection.

[0106] In this embodiment, a pressure plate 12 is provided to ensure the operation of the solid-state battery cell 11. Simultaneously, by providing battery units 10, the number and arrangement of battery units 10 can be adjusted according to the space available for storing the battery device 100 in the power-consuming device, thereby improving the space utilization rate of the battery device 100 within the power-consuming device.

[0107] Figure 6 is a schematic diagram of another battery device provided in an embodiment of this application. Figure 7 is a schematic diagram of another battery device provided in an embodiment of this application.

[0108] In some alternative embodiments, referring to Figures 6 and 7, the battery cell 10 includes a plurality of solid-state battery cells 11, with at least one solid-state battery cell 11 sandwiched between adjacent pressure plates 12.

[0109] In some embodiments, a solid-state battery cell 11 is sandwiched between adjacent pressure plates 12. In other embodiments, multiple solid-state battery cells 11 are sandwiched between adjacent pressure plates 12.

[0110] For example, the battery cell 10 includes three pressure plates 12, which are stacked along the first direction X. The three pressure plates 12 are sequentially a first pressure plate, a second pressure plate, and a third pressure plate. A solid-state battery cell 11 is disposed between the first pressure plate and the second pressure plate, and multiple solid-state battery cells 11 are disposed between the second pressure plate and the third pressure plate.

[0111] In these alternative embodiments, the above-described arrangement facilitates the adjustment of the number of solid-state battery cells 11 between adjacent pressure plates 12, thereby increasing the applicability of the battery cell 10.

[0112] Figure 8 is a schematic diagram of another battery device provided in an embodiment of this application.

[0113] In some alternative embodiments, referring to FIG8, the solid-state battery cells 11 of at least partially adjacent pressure plates 12 have different dimensions along the first direction X.

[0114] For example, multiple pressure plates 12 are sequentially arranged along a first direction X as a first pressure plate, a second pressure plate, a third pressure plate, ..., an Nth pressure plate. The solid-state battery cell 11 between the first and second pressure plates has a first thickness dimension along the first direction X; the solid-state battery cell 11 between the second and third pressure plates has a second thickness dimension along the first direction X; the fixed battery cell between the third and fourth pressure plates has a third thickness dimension along the first direction X; ... the solid-state battery cell 11 between the (N-1)th and Nth pressure plates has an (N-1)th thickness dimension along the first direction X. In some examples, the first, second, third, ..., (N-1)th thickness dimensions may all be different. In other examples, the first to Mth thickness dimensions are the same, the (M+1)th to N-1th thickness dimensions may be the same, and the first and (M+1)th thickness dimensions are different. In still other examples, all odd-numbered thickness dimensions are the same, all even-numbered thickness dimensions are the same, and the odd and even-numbered thickness dimensions are different.

[0115] Optionally, when there is only one solid-state battery cell 11 between adjacent pressure plates 12, the dimension of the solid-state battery cell 11 between adjacent pressure plates 12 along the first direction X can be the dimension of a single solid-state battery cell 11 along the first direction X. When there are multiple solid-state battery cells 11 between adjacent pressure plates 12, the dimension of the solid-state battery cell 11 between adjacent pressure plates 12 along the first direction X can be the sum of the dimensions of multiple solid-state battery cells 11 along the first direction X.

[0116] In these alternative embodiments, the above-described configuration facilitates the adjustment of the overall size of the battery device 100 along the first direction X according to the storage space of different battery devices 100, and also helps to improve thermal management. Solid-state battery cells 11 of different sizes can have different heat dissipation characteristics. Through reasonable design, the uniformity of heat distribution of the entire battery device 100 can be improved, and the possibility of thermal runaway caused by local overheating can be reduced.

[0117] Figure 9 is a schematic diagram of another battery device provided in an embodiment of this application.

[0118] In some alternative embodiments, referring to FIG9, the solid-state battery cells 11 between at least partially adjacent pressure plates 12 have different dimensions along the second direction Y, and the first direction X and the second direction Y intersect.

[0119] For example, the plurality of pressure plates 12 are sequentially arranged along the second direction Y as a first pressure plate, a second pressure plate, a third pressure plate, ..., an Nth pressure plate. The solid-state battery cell 11 between the first and second pressure plates has a first length dimension along the second direction Y; the solid-state battery cell 11 between the second and third pressure plates has a second length dimension along the second direction Y; the fixed battery cell between the third and fourth pressure plates has a third length dimension along the second direction Y; ... the solid-state battery cell 11 between the (N-1)th and Nth pressure plates has an (N-1)th length dimension along the second direction Y. In some examples, the first, second, third, ..., (N-1)th length dimensions may all be different. In other examples, the first to Mth length dimensions are the same, the (M+1)th to N-1th length dimensions may be the same, and the first and (M+1)th length dimensions are different. In still other examples, all odd length dimensions are the same, all even length dimensions are the same, and odd and even length dimensions are different.

[0120] Optionally, when there is only one solid-state battery cell 11 between adjacent pressure plates 12, the dimension of the solid-state battery cell 11 between adjacent pressure plates 12 along the second direction Y can be the dimension of a single solid-state battery cell 11 along the second direction Y. When there are multiple solid-state battery cells 11 between adjacent pressure plates 12, and the multiple solid-state batteries are arranged side by side along the second direction Y, the dimension of the solid-state battery cell 11 between adjacent pressure plates 12 along the second direction Y can be the sum of the dimensions of the multiple solid-state battery cells 11 along the second direction Y.

[0121] Optionally, the first direction X and the second direction Y are perpendicular.

[0122] Optionally, the second direction Y can be the length direction of the solid-state battery cell 11 or the width direction of the solid-state battery cell 11. In some alternative embodiments, the solid-state battery cells 11 between at least partially adjacent pressure plates 12 have different dimensions along a third direction, and the third direction, the first direction X, and the second direction Y intersect each other.

[0123] In these alternative embodiments, combining with the foregoing embodiments allows for more flexible use of three-dimensional space for battery cells with different sizes in two directions, maximizing the volume utilization of the battery device 100, improving the overall energy density, and better adapting to the storage space of irregular or complex shaped battery devices 100, thereby improving the space utilization of the power device.

[0124] Figure 10 is a schematic diagram of another battery device provided in an embodiment of this application. Figure 11 is a schematic diagram of another battery device provided in an embodiment of this application. Figure 12 is a schematic diagram of another battery device provided in an embodiment of this application. Figure 13 is a schematic diagram of another battery device provided in an embodiment of this application. Figure 14 is a schematic diagram of another battery device provided in an embodiment of this application. Figure 15 is a schematic diagram of another battery device provided in an embodiment of this application.

[0125] In some alternative embodiments, please refer to Figures 10 to 15. The battery cell 10 includes a plurality of battery cells 10 arranged side by side along the second direction Y, and the first direction X and the second direction Y intersect.

[0126] Optionally, multiple battery cells 10 are spaced apart along the second direction Y. Alternatively, multiple battery cells are connected together along the second direction Y.

[0127] In some alternative embodiments, the plurality of battery cells 10 may also be arranged side by side along a third direction. Exemplarily, the plurality of battery cells 10 are arranged in an array along the second direction Y and the third direction.

[0128] In some embodiments, the plurality of battery cells 10 includes a first battery cell L1, a second battery cell L2, a third battery cell, ... an i-th battery cell. The dimension of the first battery cell L1 along the first direction X can be a first dimension, the dimension of the second battery cell L2 along the first direction X can be a second dimension, the dimension of the third battery cell along the first direction X can be a third dimension, ... the dimension of the i-th battery cell L1 along the first direction X can be an i-th dimension. The first dimension, the second dimension, the third dimension, ... the i-th dimension can all be different, or they can all be the same, or some dimensions can be the same while others are all different, or some dimensions can be the same while others are the same and the two different dimensions are different. It is understood that the first dimension can be the sum of the dimensions of the plurality of pressure plates 12 along the first direction X in the first battery cell L1 and the dimensions of the solid-state battery cell 11 along the first direction X. Similarly, the dimensions of the plurality of battery cells 10 along the second direction Y can also be the same or different.

[0129] For example, the first battery unit L1 includes four pressure plates 12 and three solid-state battery cells 11. The second battery unit L2 is adjacent to the first battery unit L1 and includes three pressure plates 12 and two solid-state battery cells 11. The third battery unit is located on the side of the second battery unit L2 away from the first battery unit L1 along the second direction Y. The third battery unit includes two pressure plates 12 and one solid-state battery cell 11.

[0130] For example, the first battery unit L1 includes four pressure plates 12 and three solid-state battery cells 11. The second battery unit L2 is adjacent to the first battery unit L1 and includes two pressure plates 12 and one solid-state battery cell 11. The third battery unit is located on the side of the second battery unit L2 away from the first battery unit L1 along the second direction Y. The third battery unit includes two pressure plates 12 and one solid-state battery cell 11. The thickness of the solid-state battery cell 11 in the second battery unit L2 is greater than the thickness of the solid-state battery cell 11 in the first battery unit L1, and the thickness of the solid-state battery cell 11 in the second battery unit L2 is greater than the thickness of the solid-state battery cell 11 in the third battery unit. Optionally, the thickness of the solid-state battery cell 11 in the first battery unit L1 is greater than the thickness of the solid-state battery cell 11 in the third battery unit.

[0131] Optionally, the shape and size of the pressure plate 12 in at least some of the multiple battery cells 10 can be different or the same.

[0132] In these alternative embodiments, the above-described configuration facilitates modular maintenance, allowing individual replacement of faulty battery cells 10, reducing the impact on the entire battery device 100. Furthermore, it enables standardized design, simplifying the production and maintenance process.

[0133] In some alternative embodiments, as shown in Figures 11 to 15, at least some of the battery cells 10 include different numbers of pressure plates 12; and / or, at least some of the battery cells 10 include different numbers of solid-state battery cells 11.

[0134] In some embodiments, at least some of the battery cells 10 include different numbers of pressure plates 12, and at least some of the battery cells 10 include different numbers of solid-state battery cells 11. In other embodiments, at least some of the battery cells 10 include different numbers of pressure plates 12. In other embodiments, at least some of the battery cells 10 include different numbers of solid-state battery cells 11.

[0135] In some embodiments, a subset of battery cells 10 may include a different number of pressure plates 12. Alternatively, all battery cells 10 may include a different number of pressure plates 12. It is understood that in a battery cell 10, when there is only one solid-state battery cell 11 between adjacent pressure plates 12, the number of pressure plates 12 may differ, and therefore the number of solid-state battery cells 11 may also differ. In a battery cell 10, when there are multiple solid-state battery cells 11 between adjacent pressure plates 12, the number of pressure plates 12 may differ, and the number of solid-state battery cells 11 may be different or the same.

[0136] In some embodiments, a subset of battery cells 10 may contain a different number of solid-state battery cells 11. Alternatively, all battery cells 10 may contain a different number of solid-state battery cells 11. It is understood that in a battery cell 10, when there is only one solid-state battery cell 11 between adjacent pressure plates 12, the number of solid-state battery cells 11 may differ, and the number of pressure plates 12 may also differ. In a battery cell 10, when there are multiple solid-state battery cells 11 between adjacent pressure plates 12, the number of solid-state battery cells 11 may differ, and the number of pressure plates 12 may be different or the same.

[0137] In these alternative embodiments, designing the number of pressure plates 12 or the number of solid-state battery cells 11 of at least some of the battery cells 10 to be different can improve the utilization of irregular or limited space in the battery storage device 100. At the same time, different battery cells 10 can be designed as battery cells 10 with different performance according to different needs. For example, some battery cells 10 are high-energy-density battery cells 10, and others are high-power output battery cells 10, thereby improving the flexibility of the arrangement of battery cells 10 within the battery device 100.

[0138] In some alternative embodiments, as shown in Figures 11 to 14, multiple pressure plates 12 in adjacent battery cells 10 are offset along a first direction X.

[0139] Optionally, the multiple pressure plates 12 in adjacent battery cells 10 can be alternately arranged along the first direction X. Alternatively, they can be arranged only in a staggered manner along the first direction X.

[0140] For example, a plurality of pressure plates 12 in the first battery cell L1 and a plurality of pressure plates 12 in the second battery cell L2 are alternately arranged along the first direction X.

[0141] For example, multiple pressure plates 12 from the second battery unit L2 are provided between two adjacent pressure plates 12 in the first battery unit L1. Here, "between two adjacent pressure plates 12" refers to the plane between two adjacent pressure plates 12.

[0142] For example, as shown in FIG13, two adjacent pressure plates 12 in the second battery cell L2 are respectively located between two non-adjacent pressure plates 12 in the first battery cell L1. For example, the first battery cell L1 includes a first pressure plate, a second pressure plate, a third pressure plate, and a fourth pressure plate stacked along the first direction X. The second battery cell L2 includes a fifth pressure plate and a sixth pressure plate stacked along the first direction X, with the fifth pressure plate located between the first and second pressure plates, and the sixth pressure plate located between the second and third pressure plates.

[0143] In these alternative embodiments, the above-described arrangement helps to reduce the gaps between battery cells 10, improve the space utilization of the storage space for irregular or complex battery devices 100, and allow faulty battery cells 10 to be replaced individually, thereby reducing the difficulty of disassembling and assembling faulty battery cells 10 and improving maintenance efficiency.

[0144] In some alternative embodiments, referring to FIG15, in two adjacent battery cells 10, at least one pressure plate 12 of one battery cell 10 is arranged side by side with at least one pressure plate 12 of the other battery cell 10 and is integrally formed.

[0145] In some embodiments, in two adjacent battery cells 10, a plurality of pressure plates 12 of one battery cell 10 are arranged side-by-side and integrally formed with a plurality of pressure plates 12 of the other battery cell 10. In other embodiments, in two adjacent battery cells 10, a pressure plate 12 of one battery cell 10 is arranged side-by-side and integrally formed with a pressure plate 12 of the other battery cell 10. In still other embodiments, in two adjacent battery cells 10, a portion of the pressure plates 12 of one battery cell 10 are arranged side-by-side and integrally formed with a portion of the pressure plates 12 of the other battery cell 10. Here, "side-by-side arrangement" means that the two pressure plates 12 are arranged side-by-side along a second direction Y or another direction intersecting the first direction X. Optionally, the two pressure plates 12 are on the same plane. Here, "integratedly formed" means that the two pressure plates 12 can be manufactured together to form a whole, and this whole is divided into two regions, which are the two pressure plates 12 in the two battery cells 10 respectively.

[0146] For example, two adjacent battery units 10 are a first battery unit L1 and a second battery unit L2. The first battery unit L1 includes a first pressure plate, a second pressure plate, a third pressure plate, ..., an Nth pressure plate stacked along a first direction X. The second battery unit L2 includes an N+1th pressure plate, an N+2th pressure plate, an N+3th pressure plate, ..., an Mth pressure plate stacked along the first direction X. The first pressure plate and the N+1th pressure plate are arranged side by side and integrally formed; the second pressure plate and the N+2th pressure plate are arranged side by side and integrally formed; the third pressure plate and the N+3th pressure plate are arranged side by side and integrally formed; ..., the Nth pressure plate and the Mth pressure plate are arranged side by side and integrally formed. Alternatively, the first to the ith pressure plates are arranged side by side and integrally formed with the N+1th to the N+ith pressure plates, respectively, and the i+1th to the Nth pressure plates are staggered with the N+i+1th to the Mth pressure plates along the first direction X. M > N.

[0147] In these alternative embodiments, the possibility of loosening between the pressure plates 12 can be reduced by the integrated design, thereby improving the overall structural stability of the battery device 100, simplifying the assembly process, increasing production efficiency, and reducing manufacturing costs.

[0148] In some alternative embodiments, as shown in Figures 10 to 15, there are multiple connectors 20, and at least one connector 20 connects the pressure plates 12 of adjacent battery cells 10.

[0149] For example, within a battery cell 10, multiple pressure plates 12 are connected together by one or more connectors 20. Adjacent battery cells 10 can be connected by one or more connectors 20 to their pressure plates 12. For instance, within a battery cell 10, multiple pressure plates 12 are connected by four connectors 20, with each connector 20 connecting multiple pressure plates 12, and the four connectors 20 are spaced apart. Two adjacent battery cells 10 are respectively a first battery cell L1 and a second battery cell L2, and one or more of the four connectors 20 connect the pressure plates 12 of the first battery cell L1 to the pressure plates 12 of the second battery cell L2.

[0150] In some embodiments, a connector 20 can connect the pressure plates 12 of two adjacent battery cells 10, or connect the pressure plates 12 of three or more adjacent battery cells 10.

[0151] In these alternative embodiments, the above-described configuration helps to reduce the number of connectors 20, improve the connection stability between multiple battery cells 10, reduce the distance between multiple battery cells 10, improve the integration of the battery device 100, and reduce the overall size of the battery device 100.

[0152] Figure 16 is a schematic diagram of another battery device provided in an embodiment of this application.

[0153] In some alternative embodiments, please refer to FIG16, the connector 20 includes a connecting rod, and the pressure plate 12 is provided with a connecting hole 121, to which the connecting rod is connected.

[0154] Optionally, the connecting hole 121 can be a through hole or a blind hole. For example, when the connecting hole 121 is a through hole, the connecting rod can pass through the through hole to connect multiple pressure plates 12; when the connecting hole 121 is a blind hole, the connecting piece 20 and the connecting hole 121 can be connected by threaded connection, interference fit, or other fitting methods to connect multiple pressure plates 12. Optionally, the connecting hole 121 and the connecting rod can also be connected by welding, keying, riveting, or other methods.

[0155] In these alternative embodiments, the above-described arrangement helps to simplify the connection structure between the pressure plate 12 and the connector 20, reduce manufacturing costs, and improve production efficiency.

[0156] In some alternative embodiments, please refer to FIG16, there are multiple connectors 20, which are disposed on the periphery of the solid-state battery cell 11.

[0157] For example, multiple connectors 20 are disposed on opposite sides of the solid-state battery cell 11 along the second direction Y, and / or multiple connectors 20 are disposed on opposite sides of the solid-state battery cell 11 along a third direction. Optionally, the first direction X, the second direction Y, and the third direction intersect each other.

[0158] Optionally, the connector 20 and the solid-state battery cell 11 can be spaced apart or attached together.

[0159] In these alternative embodiments, the above-described configuration helps to improve the uniformity of stress on the solid-state battery cell 11, reduce the possibility of deformation of the solid-state battery cell 11 due to excessive local stress, improve the pull-out resistance of the battery cell 10, and reduce the possibility of separation of the battery cell 10 under external force.

[0160] In some alternative embodiments, please refer to FIG16, the pressure plate 12 has a recess 122 on the side facing the solid-state battery cell 11, and at least a portion of the solid-state battery cell 11 is disposed in the recess 122.

[0161] Optionally, the projections of the solid-state battery cells 11 onto the pressure plate 12 can all be located within the recesses 122.

[0162] Optionally, the recess 122 can accommodate a portion of the solid-state battery cell 11. Of course, the recess 122 can also accommodate the entire solid-state battery cell 11.

[0163] Optionally, the pressure relief mechanism of the solid-state battery cell 11 is disposed opposite to the inner wall of the recess 122, so that the impact force of the emission from the solid-state battery cell 11 acts on the recess 122, thereby reducing the possibility of the emission affecting other devices in the battery device 100 and other solid-state battery cells 11.

[0164] In these alternative embodiments, it is advantageous to reduce the size of the battery cell 10 along the first direction X, thereby reducing the overall size of the battery device 100 and increasing the energy density of the battery device.

[0165] Secondly, embodiments of this application provide an electrical device, including the battery device 100 in any of the foregoing embodiments, the battery device being used to provide electrical energy.

[0166] According to some embodiments of this application, referring to Figures 3 to 15, the battery device 100 includes a battery cell 10 and a connector 20. The battery cell 10 includes a solid-state battery cell 11 and a plurality of pressure plates 12, which are stacked along a first direction X, with the solid-state battery cell 11 sandwiched between adjacent pressure plates 12. The connector 20 securely connects the plurality of pressure plates 12 of the battery cell 10.

[0167] The battery cell 10 includes a plurality of solid-state battery cells 11, with at least one solid-state battery cell 11 sandwiched between adjacent pressure plates 12.

[0168] The solid-state battery cells 11 between at least some adjacent pressure plates 12 have different dimensions along the first direction X. The solid-state battery cells 11 between at least some adjacent pressure plates 12 have different dimensions along the second direction Y, and the first direction X and the second direction Y intersect.

[0169] The battery cells 10 include multiple battery cells arranged side-by-side along a second direction Y, where the first direction X and the second direction Y intersect. At least some of the battery cells 10 include a different number of pressure plates 12; and at least some of the battery cells 10 include a different number of solid-state battery cells 11. The pressure plates 12 in adjacent battery cells 10 are staggered along the first direction X. In two adjacent battery cells 10, at least one pressure plate 12 of one battery cell 10 is arranged side-by-side with at least one pressure plate 12 of the other battery cell 10 and is integrally formed.

[0170] There are multiple connectors 20, and at least one connector connects the pressure plates 12 of adjacent battery cells 10. Each connector 20 includes a connecting rod, and the pressure plate 12 has a connecting hole 121 to which the connecting rod is connected. Multiple connectors 20 are distributed around the periphery of the solid-state battery cell 11.

[0171] 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: A battery cell includes a solid-state battery cell and multiple pressure plates, wherein the multiple pressure plates are stacked along a first direction and the solid-state battery cell is sandwiched between adjacent pressure plates. A connector securely connects the plurality of pressure plates of the battery unit.

2. The battery device according to claim 1, wherein, The battery cell includes a plurality of solid-state battery cells, and at least one solid-state battery cell is sandwiched between adjacent pressure plates.

3. The battery device according to claim 1 or 2, wherein, The solid-state battery cells between at least partially adjacent pressure plates of the plurality of pressure plates have different dimensions along the first direction.

4. The battery device according to any one of claims 1-3, wherein, The solid-state battery cells between at least partially adjacent pressure plates of the plurality of pressure plates have different dimensions along a second direction, wherein the first direction and the second direction intersect.

5. The battery device according to any one of claims 1-4, wherein, The battery cell comprises multiple battery cells arranged side by side along a second direction, wherein the first direction and the second direction intersect.

6. The battery device according to claim 5, wherein, At least some of the battery cells in the plurality of battery cells include different numbers of the pressure plates; and / or, At least some of the battery cells in the plurality of battery cells include different numbers of the solid-state battery cells.

7. The battery device according to claim 5, wherein, The plurality of pressure plates in adjacent battery cells are staggered along the first direction.

8. The battery device according to claim 5, wherein, In two adjacent battery cells, at least one pressure plate of one battery cell is arranged side by side with at least one pressure plate of the other battery cell and is integrally formed.

9. The battery device according to claim 5, wherein, There are multiple connectors, and at least one connector connects the pressure plates of adjacent battery cells.

10. The battery device according to any one of claims 1-9, wherein, The connector includes a connecting rod, the pressure plate has a connecting hole, and the connecting rod is connected to the connecting hole.

11. The battery device according to any one of claims 1-9, wherein, There are multiple connectors, which are disposed on the periphery of the solid-state battery cell.

12. The battery device according to any one of claims 1-9, wherein, The pressure plate has a recess on the side facing the solid-state battery cell, and at least a portion of the solid-state battery cell is disposed within the recess.

13. An electrical device comprising a battery device as described in any one of claims 1 to 12, the battery device being used to provide electrical energy.

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