Battery apparatus and electric device

Abstract

Provided in the present application are a battery apparatus and an electric device. The battery apparatus comprises: a case having an accommodating cavity; a battery cell arranged in the accommodating cavity and comprising a housing, an electrode assembly and an electrode terminal, the electrode assembly being accommodated in the housing, the housing comprising a first wall, the electrode terminal being arranged on the first wall and being electrically connected to the electrode assembly, and the electrode terminal protruding from the first wall in a first direction and toward the side away from the electrode assembly; a thermal management component stacked with the first wall, in the first direction, the orthographic projection of the thermal management component on the first wall being offset from the orthographic projection of the electrode terminal on the first wall, and the thermal management component being configured to regulate the temperature of the battery cell, wherein the thermal management component has a first surface facing the first wall, and in the first direction and from the first wall toward the thermal management component, the electrode terminal protrudes beyond at least part of the first surface. The present application can improve the energy density of the battery apparatus.

Description

Battery devices and electrical equipment

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese patent application 202510044806.9, filed on January 10, 2025, entitled “Battery Device and Electrical Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

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

[0004] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0005] With the continuous development of battery technology, how to improve the energy density of battery devices is one of the problems to be solved in the industry. Summary of the Invention

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

[0007] In a first aspect, this application provides a battery device, comprising: a housing having a receiving cavity; a battery cell disposed in the receiving cavity, the battery cell including a casing, an electrode assembly, and electrode terminals, the electrode assembly being housed within the casing, the casing including a first wall, the electrode terminals being disposed on the first wall and electrically connected to the electrode assembly, the electrode terminals being disposed along a first direction and protruding from the first wall toward a side opposite to the electrode assembly; and a thermal management component stacked on the first wall, wherein along the first direction, the orthographic projection of the thermal management component on the first wall and the orthographic projection of the electrode terminals on the first wall are offset from each other, the thermal management component being used to regulate the temperature of the battery cell; wherein the thermal management component has a first surface facing the first wall, and along the first direction pointing from the first wall toward the thermal management component, at least a portion of the electrode terminals protruding from the first surface.

[0008] One embodiment of this application provides a battery device including a housing, battery cells, and a thermal management component. The battery cells are disposed within a receiving cavity of the housing and include a casing, an electrode assembly, and electrode terminals. The casing includes a first wall, and the electrode terminals are disposed on the first wall. Because the thermal management component is stacked with the first wall, the orthographic projection of the thermal management component on the first wall and the orthographic projection of the electrode terminals on the first wall are offset from each other. The thermal management component has a first surface facing the first wall. Along a first direction and pointing from the first wall towards the thermal management component, the electrode terminals protrude at least partially from the first surface. This configuration allows the thermal management component to not only control the temperature of the battery cells but also allows the thermal management component and the electrode terminals to share space in the first direction. This increases the design space of the battery cells, ensuring the assembly efficiency of the battery device and improving the energy density requirements of the battery device.

[0009] In some embodiments, the thermal management component is partially overlapped with the electrode terminal along a second direction, the second direction being at least one direction on a plane perpendicular to the first direction.

[0010] This arrangement allows the thermal management components and electrode terminals to share space in the first direction, ensuring the battery pack efficiency and increasing the energy density required by the battery device. Furthermore, it allows parts of the thermal management components and electrode terminals to be arranged side-by-side in the second direction, improving space utilization.

[0011] In some embodiments, the thermal management component is at least partially abutted against the first wall.

[0012] By fitting the thermal management component to the first wall, the thermal management component and the first wall of the battery cell can directly contact and exchange heat, shortening the heat conduction path between them and increasing the heat exchange rate.

[0013] In some embodiments, a connector is provided between the thermal management component and the first wall.

[0014] One embodiment of the battery device provided in this application provides a connector between the thermal management component and the first wall. When there is a gap between the thermal management component and the first wall, the connector can fill the gap between the first wall and the thermal management component, ensuring a smooth heat conduction path and thus ensuring the heat exchange requirements between the thermal management component and the battery cell.

[0015] In some embodiments, the enclosure includes an enclosure body and a limiting beam. The enclosure body has a receiving cavity, the limiting beam is disposed in the receiving cavity and connected to the enclosure body, and the thermal management component is connected to the limiting beam.

[0016] One embodiment of the battery device provided in this application connects the thermal management component to the limiting beam, which not only ensures the fixed installation position of the thermal management component, but also provides high overall strength for the thermal management component and the limiting beam, which helps to resist the expansion pressure of the battery cell and reduce deformation.

[0017] In some embodiments, the limiting beams are arranged in pairs and spaced apart, the battery cells are located between the paired limiting beams, and the thermal management component includes a heat exchange body and a connecting structure. The heat exchange body is connected to the paired limiting beams, and the connecting structure protrudes from the heat exchange body along a first direction.

[0018] The above configuration enables multi-point connections between the heat exchanger body and the limiting beam, ensuring the stability of the connection between the thermal management components and the limiting beam. Furthermore, by making the connecting structure protrude from the heat exchanger body along the first direction, it facilitates the connection between the connecting structure and external pipelines, ensuring the entry and exit of the heat exchange medium.

[0019] In some embodiments, the battery cell further includes a pressure relief component for releasing gas inside the battery cell; the pressure relief component is disposed on the first wall, and a clearance portion is provided on the thermal management component at a position corresponding to the pressure relief component.

[0020] With the above configuration, when the internal pressure of a battery cell reaches a preset value, the pressure relief component can open and release the internal pressure of the battery cell. By providing a clearance section, when both the pressure relief component and the thermal management component are located on the first wall, the thermal management component will not obstruct the pressure relief component, ensuring the overall reliability of the battery device.

[0021] In some embodiments, the clearance portion includes a first hole disposed on the thermal management component, the first hole being disposed through the thermal management component along a first direction.

[0022] One embodiment of the present application provides a battery device in which the clearance portion includes a first hole, allowing the gas discharged by the pressure relief component to pass through the first hole and through the thermal management component, thereby ensuring the pressure relief requirement.

[0023] In some embodiments, the clearance portion includes a recess provided on the thermal management component, the recess being recessed toward a side away from the housing.

[0024] One embodiment of the battery device provided in this application, by including a recess in the clearance portion, can also avoid the pressure relief component, allowing the gas released during pressure relief to enter the recess and be released, thus ensuring the pressure relief requirements are met.

[0025] In some embodiments, the number of battery cells is multiple, and the thermal management component is an integral structure, which is stacked with the first wall of each battery cell.

[0026] The battery device provided in one embodiment of this application, through the above-described arrangement, facilitates the assembly of the thermal management components and meets the temperature control requirements between them and the individual battery cells. Furthermore, the above-described arrangement also increases the heat exchange area between the components and the individual battery cells, ensuring the heat exchange rate.

[0027] In some embodiments, there are multiple battery cells and multiple thermal management components, with the multiple thermal management components spaced apart from each other, and each thermal management component is stacked with a first wall of a portion of the battery cells.

[0028] One embodiment of the present application provides a battery device that, by setting multiple thermal management components, can both ensure the heat exchange requirements between the thermal management components and the battery cells and ensure the avoidance requirements of the electrode terminals, thus satisfying the space sharing requirements between the thermal management components and the electrode terminals.

[0029] In some embodiments, multiple battery cells are grouped to form multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells arranged in an array. Each battery cell assembly is provided with a corresponding thermal management component. The thermal management component is stacked with at least a portion of the first wall of each battery cell in the same battery cell assembly.

[0030] One embodiment of this application provides a battery device that groups multiple battery cells together, with each battery cell assembly having a corresponding thermal management component. This allows each thermal management component to exchange heat with the individual battery cells within its assembly, ensuring effective temperature regulation of the battery cells. Furthermore, this arrangement facilitates the use of areas on the first wall of each battery cell assembly that are not equipped with electrode terminals, ensuring space sharing and improving the energy density of the battery device.

[0031] In some embodiments, the battery cell includes paired electrode terminals with opposite polarities, the paired electrode terminals being located on the same side of the housing in a first direction, and portions of each thermal management component being located between the paired electrode terminals of the same battery cell.

[0032] The battery device provided in one embodiment of this application, through the above-described configuration, can ensure the use of electrode terminals on the same side of the battery cells, and can also ensure the heat exchange requirements and energy density improvement requirements under this configuration.

[0033] In some embodiments, multiple battery cells are grouped to form multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells arranged in an arrangement. Each battery cell assembly is provided with two or more thermal management components. At least one thermal management component is stacked with at least a portion of the first wall of each battery cell in two adjacent battery cell assemblies.

[0034] The battery device provided in one embodiment of this application, through the above-described configuration, can also guarantee the heat exchange requirements and energy density improvement requirements under this form.

[0035] In some embodiments, a battery cell includes a pair of electrode terminals with opposite polarities, the pair of electrode terminals being disposed opposite to each other on the first wall of the housing on both sides in a first direction, and thermal management components being disposed on both sides of the battery cell in the first direction.

[0036] The battery device provided in one embodiment of this application, through the above-described configuration, can meet the functional requirements of the electrode terminals led out on both sides of the battery device, and can ensure the heat exchange requirements and energy density improvement requirements under this configuration.

[0037] Secondly, this application provides an electrical device including the aforementioned battery device.

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

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the 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:

[0040] Figure 1 is a structural schematic diagram of a vehicle provided in an embodiment of this application;

[0041] Figure 2 is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0042] Figure 3 is an exploded structural diagram of a battery cell according to an embodiment of this application;

[0043] Figure 4 is a top view of a battery device according to an embodiment of this application;

[0044] Figure 5 is a cross-sectional view of a battery device according to an embodiment of this application;

[0045] Figure 6 is a magnified view of part A in Figure 5;

[0046] Figure 7 is a schematic diagram of the structure of a thermal management component according to an embodiment of this application;

[0047] Figure 8 is a top view of a battery device according to another embodiment of this application;

[0048] Figure 9 is a top view of a battery device according to yet another embodiment of this application.

[0049] Marking Explanation: 1. Vehicle; 100. Battery Unit; 300. Controller; 400. Motor; 200. Battery Module; 2. Energy Storage Device; 201. Control Box; 202. Battery Cluster; 10. Housing; 101. Receiving Cavity; 11. First Housing Section; 12. Second Housing Section; 10a. Housing Body; 10b. Limiting Beam; 20. Battery Cell; 20a. Outer Shell; 20b. First Wall; 21. Housing; 211. Opening; 22. Electrode Assembly; 23. Cover Plate; 24. Electrode Terminal; 25. Pressure Relief Component; 30. Thermal Management Component; 30a. First Surface; 31. Heat Exchanger Body; 32. Connection Structure; 311. First Hole; 312. Second Hole; 313. Recess; X. First Direction; Y. Second Direction. Detailed Implementation

[0050] 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.

[0051] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by those skilled in the art to which the embodiments of this application pertain.

[0052] 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", "circumferential", etc., 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 do not 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.

[0053] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0054] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the 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.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0057] Understandably, the temperature environment inside a battery pack is affected by the external environment. The individual battery cells within the pack need to operate within a certain temperature range. When the temperature inside the pack exceeds or falls below this range, the stability of the individual cells and the overall battery performance will be significantly impacted. For example, in hot weather, the battery pack needs to cool the individual cells to maintain the required temperature range; in cold weather, the battery pack needs to heat the individual cells to keep the internal temperature within the required range.

[0058] In related technologies, the heat exchange structure located inside the battery device occupies a large space inside the battery device, which reduces the space available for arranging individual battery cells. This affects the design of the individual battery cells' height, width, and other spatial dimensions, and consequently affects the overall energy density of the battery device, resulting in lower range or energy storage capacity.

[0059] Based on the above considerations, to ensure that the individual battery cells within the battery device operate within a certain temperature range and to guarantee the overall energy density requirements of the battery device, one embodiment of this application provides a battery device including a housing, individual battery cells, and a thermal management component. The housing has a receiving cavity; the individual battery cells are disposed in the receiving cavity and include a shell, an electrode assembly, and electrode terminals. The electrode assembly is housed within the shell, which includes a first wall. The electrode terminals are disposed on the first wall and electrically connected to the electrode assembly, protruding from the first wall along a first direction and away from the electrode assembly. The thermal management component is stacked with the first wall, and along the first direction, the orthographic projection of the thermal management component on the first wall and the orthographic projection of the electrode terminals on the first wall are offset from each other. The thermal management component is used to regulate the temperature of the individual battery cells. The thermal management component has a first surface facing the first wall, and along the first direction and from the first wall towards the thermal management component, at least a portion of the electrode terminals protrude from the first surface. This arrangement allows the thermal management component and the electrode terminals of the individual battery cells to share space in the first direction, enabling an increase in the spatial size design of the individual battery cells, ensuring the assembly efficiency of the battery device, and improving the energy density requirements of the battery device.

[0060] The technical solutions described in the embodiments of this application are applicable to electrical equipment that uses battery devices.

[0061] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0062] It should be understood that the technical solutions described in the embodiments of this application are not limited to the batteries and electrical devices described above, but can also be applied to all batteries including housings and electrical devices using batteries. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0063] For example, as shown in Figure 1, vehicle 1 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. The interior of vehicle 1 can house a motor 400, a controller 300, and a battery device 100. The controller 300 controls the battery device 100 to supply power to the motor 400. For example, the battery device 100 can be located at the bottom, front, or rear of vehicle 1. The battery device 100 can be used to power vehicle 1; for example, it can serve as the operating power source for the vehicle 1's electrical system, such as meeting the power requirements for starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for vehicle 1 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving power to vehicle 1.

[0064] It should be understood that the technical solutions described in the embodiments of this application are not limited to the above-mentioned vehicle 1.

[0065] As shown in Figures 2 to 6, to meet different power demands, the battery device 100 may include a housing 10, battery cells 20, and a thermal management component 30. The housing 10 has a receiving cavity 101, in which the battery cells 20 are disposed. The battery cells 20 include a housing 20a, an electrode assembly 22, and electrode terminals 24. The electrode assembly 22 is housed within the housing 20a, which includes a first wall 20b. The electrode terminals 24 are disposed on the first wall 20b and electrically connected to the electrode assembly 22. The electrode terminals 24 protrude from the first wall 20b along a first direction X and toward a side opposite to the electrode assembly 22. The thermal management component 30 is stacked on top of the first wall 20b. Along the first direction X, the orthographic projection of the thermal management component 30 on the first wall 20b and the orthographic projection of the electrode terminals 24 on the first wall 20b are offset from each other. The thermal management component 30 is used to regulate the temperature of the battery cells 20. The thermal management component 30 has a first surface 30a facing the first wall 20b, extending along the first direction X and pointing from the first wall 20b to one side of the thermal management component 30. At least a portion of the electrode terminal 24 protrudes from the first surface 30a. This arrangement allows the thermal management component 30 and the electrode terminal 24 of the battery cell 20 to share space in the first direction X, thereby increasing the spatial dimension of the battery cell in the first direction X, ensuring the packing efficiency of the battery device 100, and improving the energy density requirements of the battery device 100.

[0066] The housing 10 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or it can be a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. This application embodiment does not limit this. The material of the housing 10 can be an alloy material such as aluminum alloy or iron alloy, or a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin. This application embodiment also does not limit this.

[0067] The housing 10 is used to accommodate the battery cell 20, and the housing 10 can have various structures. In some embodiments, the housing 10 may include a first housing portion 11 and a second housing portion 12, which overlap each other, and together define a receiving space for accommodating the battery cell 20. The second housing portion 12 may be a hollow structure with one end open, and the first housing portion 11 may be a plate-like structure, with the first housing portion 11 covering the open side of the second housing portion 12 to form a housing 10 with a receiving space; alternatively, both the first housing portion 11 and the second housing portion 12 may be hollow structures with one side open, with the open side of the first housing portion 11 covering the open side of the second housing portion 12 to form a housing 10 with a receiving space. Of course, the first housing portion 11 and the second housing portion 12 can have various shapes, such as cylinders, cuboids, etc.

[0068] To improve the sealing performance after the first housing part 11 and the second housing part 12 are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 11 and the second housing part 12.

[0069] Assuming that the first box part 11 covers the top of the second box part 12, the first box part 11 can also be called the upper box cover, and the second box part 12 can also be called the lower box 10.

[0070] In the battery device 100, there can be one or more battery cells 20. If there are multiple battery cells 20, they can be connected in series, in parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed configuration, and then the whole assembly of multiple battery cells 20 is housed in the housing 10. Alternatively, multiple battery cells 20 can first be connected in series, in parallel, or in a mixed configuration to form a battery module 200, and then multiple battery modules 200 can be connected in series, in parallel, or in a mixed configuration to form a whole assembly, which is then housed in the housing 10.

[0071] Multiple battery cells 20 in the battery module 200 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 20 in the battery module 200.

[0072] In this embodiment of the application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be used again after being discharged by recharging to activate the active materials.

[0073] The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0074] The outer casing 20a of the battery cell 20 can be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing 20a), or an aluminum-plastic film, etc. In some embodiments, the outer casing 20a serves to protect the electrode assembly 22, and a sealing bag is also included between the outer casing 20a and the electrode assembly 22. The sealing bag is used to encapsulate the electrode assembly 22 and the electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the outer casing 20a is a sealed structure, it is used to encapsulate the electrode assembly 22 and the electrolyte, etc.

[0075] As an example, the battery cell 20 can be a cylindrical battery cell 20, a prismatic battery cell 20, a pouch battery cell 20, or a battery cell 20 of other shapes. The prismatic battery cell 20 includes a square battery cell 20, a blade-shaped battery cell 20, and a multi-prismatic battery, such as a hexagonal prismatic battery. There are no particular limitations in this application.

[0076] The electrode assembly 22 includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the negative and positive electrodes. During the charging and discharging process of the battery cell 20, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, serves to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0077] The electrode assembly 22 can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0078] In some embodiments, the electrode assembly 22 is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0079] In some embodiments, the electrode assembly 22 has a stacked structure.

[0080] As an example, multiple positive and negative electrodes can be set, and multiple positive and multiple negative electrodes can be stacked alternately.

[0081] As an example, multiple positive electrode plates can be provided, and negative electrode plates can be folded to form multiple stacked folded segments, with a positive electrode plate sandwiched between adjacent folded segments.

[0082] As an example, both the positive and negative electrode plates are folded to form multiple stacked folded segments.

[0083] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0084] As an example, the separators can be continuously arranged, either by folding or rolling between any adjacent positive or negative electrode plates.

[0085] In some embodiments, the electrode assembly 22 may be cylindrical, flat, or polygonal in shape.

[0086] In some embodiments, the electrode assembly 22 is provided with tabs that can conduct current from the electrode assembly 22. The tabs include a positive tab and a negative tab.

[0087] The outer casing 20a of the battery cell 20 may include a housing 21 and a cover plate 23. The housing 21 has a cavity and an opening 211 communicating with the cavity. The cover plate 23 may be disposed at the opening 211 of the housing 21 and connected to the housing 21. The housing 21 or the cover plate 23 includes a first wall 20b. Optionally, the cover plate 23 includes a first wall 20b.

[0088] Electrode terminals 24 are disposed on the first wall 20b and electrically connected to the electrode assembly 22, optionally via an adapter. In the battery cell 20, electrode terminals 24 are used to connect to a busbar component to achieve electrical connection between multiple battery cells 20.

[0089] The number of electrode terminals 24 provided on the first wall 20b can be one or two. When there are two, the polarities of the two electrode terminals 24 can be opposite.

[0090] The thermal management component 30 may include a tubular or plate-like structure with heat exchange channels. The heat exchange plate or heat exchange tube defines the heat exchange channels, and the heat exchange fluid within the heat exchange channels exchanges heat with the battery cell 20 through the heat exchange tubes to control the temperature of the battery cell 20. The cross-section of the heat exchange tube can be circular, elliptical, polygonal, etc., and the cross-sectional shape of the heat exchange tube or heat exchange plate can be reasonably set as needed.

[0091] The stacked arrangement of the thermal management component 30 and the first wall 20b can also be understood as follows: the orthographic projection of the thermal management component 30 in the first direction X is at least partially located on the first wall 20b, and the thermal management component 30 can directly or indirectly exchange heat with the first wall 20b.

[0092] The thermal management component 30 avoids the electrode terminal 24 in the first direction X. This can be achieved by making openings in the thermal management component 30 so that the thermal management component 30 and the electrode terminal 24 are staggered. Of course, in some embodiments, the thermal management component 30 can also be divided into blocks to make room for the position of the electrode terminal 24, which can also ensure that the thermal management component 30 and the electrode terminal 24 are staggered.

[0093] The orthographic projection on the first wall 20b and the orthographic projection of the electrode terminal 24 on the first wall 20b are offset from each other.

[0094] The first surface 30a of the thermal management component 30 facing the first wall 20b can be a plane or a surface with uneven surfaces, and can be a plane. Along the first direction X and from the first wall 20b toward the side of the thermal management component 30, the electrode terminal 24 protrudes from at least a portion of the first surface 30a. That is, the height of at least a portion of the thermal management component 30 and the height of at least a portion of the electrode terminal 24 overlap each other, and the two can share the area in the first direction X, so that the size of the thermal management component 30 protruding from the battery cell 20 is reduced, and the thermal management component 30 is partially protruding or not protruding from the battery cell.

[0095] In one embodiment of this application, a battery device 100 is provided. Because the thermal management component 30 and the first wall 20b are stacked, the orthographic projection of the thermal management component 30 on the first wall 20b and the orthographic projection of the electrode terminal 24 on the first wall 20b are offset from each other. The thermal management component 30 has a first surface 30a facing the first wall 20b, extending along the first direction X from the first wall 20b towards the thermal management component 30. At least a portion of the electrode terminal 24 protrudes from the first surface 30a. This configuration allows the thermal management component 30 to not only control the temperature of the battery cell 20, but also enables the thermal management component 30 and the electrode terminal 24 to share space in the first direction X. Under the same size requirements for the housing, the battery device 100 provided in one embodiment of this application allows for an increase in the spatial size design of the battery cell, ensuring the assembly efficiency of the battery device 100 and improving the energy density requirements of the battery device 100.

[0096] In some alternative embodiments, in one embodiment of the present application, the thermal management component 30 is partially overlapped with the electrode terminal 24 along the second direction Y, where the second direction Y is at least one direction on a plane perpendicular to the first direction X.

[0097] The plane perpendicular to the first direction X can be a plane extending from the first wall 20b. The second direction Y can be one of several directions on the plane perpendicular to the first direction X, such as the horizontal direction, or the length direction of the shell 21. Alternatively, the second direction Y can be any direction on the plane perpendicular to the first direction X.

[0098] One embodiment of the battery device 100 provided in this application, through the above-described arrangement, facilitates the sharing of space between the thermal management component 30 and the electrode terminal 24 in the first direction X, ensuring the packing efficiency of the battery device 100 and improving the energy density requirements of the battery device 100. Furthermore, it facilitates the side-by-side arrangement of a portion of the thermal management component 30 and the electrode terminal 24 in the second direction, improving space utilization.

[0099] In some alternative embodiments, in one embodiment of the present application, the thermal management component 30 of the battery device 100 is at least partially attached to the first wall 20b.

[0100] The fact that the thermal management component 30 is attached to the first wall 20b can be understood as the thermal management component 30 being in direct contact with the first wall 20b, and the two being able to directly conduct heat and exchange heat.

[0101] The thermal management component 30 and the first wall 20b can be at least partially attached to each other. Of course, the area on the first wall 20b except for the area where the electrode terminals 24 are provided can also be attached to the thermal management component.

[0102] One embodiment of the present application provides a battery device 100, which allows the thermal management component 30 to be attached to the first wall 20b, so that the thermal management component 30 and the first wall 20b of the battery cell 20 can directly contact and exchange heat, thereby shortening the heat conduction path between the two and improving the heat exchange rate between them.

[0103] Of course, it is understood that the thermal management component 30 being fitted to the first wall 20b is an optional implementation. In some embodiments, a connector may also be provided between the thermal management component 30 and the first wall 20b.

[0104] The connector may include a thermally conductive colloid, which can be connected between the first surface 30a and the first wall 20b of the thermal management component 30. This achieves both a fixed connection between the thermal management component 30 and the first wall 20b and ensures heat conduction. Alternatively, in some embodiments, the connector may also include a thermally conductive material with high thermal conductivity, filling the space between the thermal management component 30 and the first wall 20b while also providing thermal conductivity. When the connector is provided, heat conduction can be achieved in all areas between the first wall 20b and the thermal management component 30 through the connector. In some examples, heat conduction can also be achieved in only a portion of the area between the first wall 20b and the thermal management component 30 through the connector, or in some areas, the two components can be fitted together to achieve heat conduction.

[0105] One embodiment of this application provides a battery device 100, which, by providing a connector between the thermal management component 30 and the first wall 20b, can fill the gap between the first wall 20b and the thermal management component 30 when there is a gap between them, ensuring a smooth heat conduction path and thus ensuring the heat exchange requirements between the thermal management component 30 and the battery cell 20.

[0106] Referring to Figures 2 to 6, in some optional embodiments, one embodiment of the present application provides a battery device 100, the housing 10 including a housing body 10a and a limiting beam 10b, the housing body 10a having a receiving cavity 101, the limiting beam 10b being disposed in the receiving cavity 101 and connected to the housing body 10a, and the thermal management component 30 being connected to the limiting beam 10b.

[0107] The housing body 10a may include walls, and each battery cell 20 may be disposed within the receiving cavity 101. The number of limiting beams 10b may be one or more; when there are two or more, the limiting beams 10b may be spaced apart from each other. Both ends of each limiting beam 10b may be connected to the walls of the housing body 10a to resist the expansion pressure accumulated by the battery cells 20.

[0108] The thermal management component 30 and the limiting beam 10b can be connected by a fixed connection method such as bonding or welding. Of course, in some embodiments, the thermal management component 30 and the limiting beam 10b can also be connected by a detachable connection method, such as by bolts, screws, rivets or other fastening methods.

[0109] The battery device 100 provided in one embodiment of this application connects the thermal management component 30 to the limiting beam 10b, which can ensure the fixed installation position of the thermal management component 30. At the same time, the overall strength of the thermal management component 30 and the limiting beam 10b is high, which is conducive to resisting the expansion pressure accumulated in the battery cell 20 and reducing deformation.

[0110] In some optional embodiments, in one embodiment of the present application, a battery device 100 is provided, in which limiting beams 10b are arranged in pairs and spaced apart, battery cells 20 are located between the pairs of limiting beams 10b, and thermal management component 30 includes heat exchange body 31 and connecting structure 32. The heat exchange body 31 is connected to the pairs of limiting beams 10b, and the connecting structure 32 protrudes from the heat exchange body 31 along a first direction X.

[0111] Each battery cell 20 can be arranged between paired limiting beams 10b. Multiple battery cells 20 can be arranged in groups, with each group including two or more battery cells 20. The two or more battery cells 20 in the same group can be stacked along the arrangement direction of the paired limiting beams 10b.

[0112] The heat exchange body 31 may be provided with a heat exchange channel, and the number of connection structures 32 may include two or more. Each connection structure 32 may be connected to the heat exchange channel. For example, the connection structure 32 may be a connection pipe. At least one connection structure 32 may be used for the heat exchange medium to enter the heat exchange body 31 and exchange heat with the battery cell 20, and at least one connection structure 32 may be used for the heat exchange medium to flow out of the heat exchange channel.

[0113] The length of the heat exchange body 31 can be greater than the maximum spacing between the paired limiting beams 10b, so that the heat exchange body 31 can protrude from the limiting beams 10b along the arrangement direction of the paired limiting beams 10b, and the connecting structure 32 is provided on the part of the heat exchange body 31 that protrudes from the limiting beams 10b.

[0114] This application provides a battery device 100, which, through the above-described configuration, enables multi-point connections between the heat exchange body 31 and the limiting beam 10b, ensuring the stability of the connection between the thermal management component 30 and the limiting beam 10b. Furthermore, the connecting structure 32 protrudes from the heat exchange body 31 along the first direction X, facilitating the connection between the connecting structure 32 and external pipelines, and ensuring the entry and exit of the heat exchange medium.

[0115] Continuing with Figures 2 to 6, in some optional embodiments, the battery device 100 provided in one embodiment of this application further includes a pressure relief component 25 in the battery cell 20.

[0116] The pressure relief component 25 may include a pressure relief valve or a breathable pressure relief membrane layer, etc.

[0117] The pressure relief component 25 can be provided on the first wall 20b or on other walls of the housing 20a.

[0118] One embodiment of this application provides a battery device 100, which further includes a pressure relief component 25 in the battery cell 20, so that when the pressure inside the battery cell 20 reaches a preset value, the pressure relief component 25 can open and release the pressure inside the battery cell 20.

[0119] In some alternative embodiments, the pressure relief component 25 is disposed on the first wall 20b, and the thermal management component 30 is provided with a clearance portion corresponding to the position of the pressure relief component 25.

[0120] The clearance portion includes, but is not limited to, structures that employ clearance holes or clearance recesses.

[0121] By providing a clearance section, when both the pressure relief component 25 and the thermal management component 30 are located on the first wall 20b, the thermal management component 30 will not obstruct the pressure relief of the pressure relief component 25, thus ensuring the overall reliability of the battery device 100.

[0122] Referring again to Figures 2 to 6, in some optional embodiments, the battery device 100 provided in one embodiment of this application includes a first hole 311 disposed on the thermal management component 30, the first hole 311 being disposed through the thermal management component 30 along a first direction X.

[0123] The shape of the first hole 311 can match the shape of the pressure relief component 25, or it can be larger than the area of ​​the pressure relief component 25.

[0124] Each pressure relief component 25 corresponding to a battery cell 20 may be provided with a first hole 311.

[0125] One embodiment of the present application provides a battery device 100, which ensures the pressure relief requirement is met by including a first hole 311 in the clearance portion, allowing the gas discharged by the pressure relief component 25 to pass through the thermal management component 30 through the first hole 311.

[0126] As shown in FIG7, in some embodiments, the clearance portion may include a recess 313 provided on the thermal management component 30, the recess 313 being recessed toward the side opposite to the outer casing 20a.

[0127] Optionally, the number of recesses 313 can be one or more. When the battery cells 20 are arranged in multiple rows, the number of recesses 313 can be multiple, and each recess 313 can correspond to the pressure relief component 25 of at least one row of battery cells 20.

[0128] One embodiment of the present application provides a battery device 100 that, by including a recess 313 in the clearance portion, can also make way for the pressure relief component 25, so that the gas released during pressure relief can enter the recess 313 and be released, thus ensuring the pressure relief requirements.

[0129] Optionally, the pressure relief components 25 of each battery cell 20 in the same row can be arranged opposite to a recess 313. The recess 313 can be arranged through the battery cells 20 in the same row to facilitate the discharge of gas in the recess 313 to the outside of the housing 10.

[0130] Please refer to Figures 2 to 8. In some embodiments, the number of battery cells 20 may be multiple, the number of thermal management components 30 may be multiple, the multiple thermal management components 30 may be spaced apart from each other, and each thermal management component 30 may be stacked with a portion of the first wall 20b of the battery cells 20.

[0131] The number of thermal management components 30 can be two, three, or more. Each thermal management component 30 can be stacked with the first wall 20b of one, two, or more battery cells 20.

[0132] Each thermal management component 30 may include a heat exchange body 31 and a connection structure 32 disposed on the heat exchange body 31.

[0133] One embodiment of this application provides a battery device 100 that, by having multiple thermal management components 30, can both ensure the heat exchange requirements between the thermal management components 30 and the battery cells 20, and at the same time ensure the avoidance requirements of the electrode terminals 24, thus satisfying the space sharing requirements between the thermal management components 30 and the electrode terminals 24.

[0134] As shown in Figures 2 to 6, in some optional embodiments, the battery device 100 provided in one embodiment of this application comprises multiple battery cells 20 grouped together to form multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells 20 stacked together. Each battery cell assembly is provided with a corresponding thermal management component 30. The thermal management component 30 is at least partially stacked with the first wall 20b of each battery cell 20 in the same battery cell assembly.

[0135] The battery cell assembly may include two or more battery cells 20 stacked on top of each other. Each battery cell 20 may have two electrode terminals 24 with opposite polarities on one side of the first wall 20b. Correspondingly, the thermal management component 30 corresponding to the battery cell assembly may be located between the two electrode terminals 24. Alternatively, a single electrode terminal 24 may be provided on the first wall 20b on the first direction X side. Correspondingly, the thermal management component 30 corresponding to the battery cell assembly may have a second hole 312 through which the electrode terminal 24 can pass.

[0136] One embodiment of this application provides a battery device 100 that groups multiple battery cells 20 together, with each battery cell assembly having a corresponding thermal management component 30. This allows each thermal management component 30 to exchange heat with each battery cell 20 within its corresponding assembly, ensuring effective temperature regulation of the battery cells 20. Furthermore, this arrangement facilitates the utilization of areas on the first wall 20b of each battery cell assembly that are not equipped with electrode terminals 24, ensuring space sharing and improving the energy density of the battery device 100.

[0137] In some embodiments, the battery device 100 provided in one embodiment of this application includes a battery cell 20 comprising paired electrode terminals 24 with opposite polarities, the paired electrode terminals 24 being located on the same side of the housing 20a in a first direction X, and each thermal management component 30 being partially located between the paired electrode terminals 24 of the same battery cell 20.

[0138] Two electrode terminals 24 with opposite polarities protrude from the same side on the first wall 20b, with a large space between them. The thermal management component 30 is located between the two electrode terminals 24 and shares space with both electrode terminals 24 in the first direction X.

[0139] The battery device 100 provided in one embodiment of this application, through the above-described configuration, can ensure the use of the electrode terminal 24 on the same side of the battery cell 20, and can also ensure the heat exchange requirements and energy density improvement requirements under this configuration.

[0140] As shown in Figure 8, in some optional embodiments, the battery device 100 provided in one embodiment of this application includes multiple battery cells 20 grouped together to form multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells 20 stacked together. Each battery cell assembly is provided with two or more thermal management components 30. At least one thermal management component 30 is at least partially stacked with the first wall 20b of each battery cell 20 of two adjacent battery cell assemblies.

[0141] The number of thermal management components 30 provided for each battery cell assembly can be one or more, and optionally two. For example, the two thermal management components 30 can be located on both sides of the electrode terminal 24. When the battery cell 20 includes two electrode terminals 24 on the same side in the first direction X, the two thermal management components 30 can be located on the side of the two electrode terminals 24 away from each other.

[0142] Optionally, two adjacent battery cell assemblies may share one of the thermal management components 30. For example, one side of the thermal management component 30 may be stacked with the first wall 20b of each battery cell 20 of one battery cell assembly, and the other side may be stacked with the first wall 20b of each battery cell 20 of another battery cell assembly.

[0143] The battery device 100 provided in one embodiment of this application, through the above-described configuration, can also guarantee the heat exchange requirements and energy density improvement requirements under this form.

[0144] As shown in Figure 9, in some optional embodiments, the battery device 100 provided in one embodiment of this application may also have a single thermal management component 30 located on one side of each battery cell 20 in the first direction X when there are multiple battery cells 20. The thermal management component 30 is an integral structure and is stacked with the first wall 20b of each battery cell 20.

[0145] The thermal management component 30 can be an integral structure, which can be laid along the extension direction of the first wall 20b. The thermal management component 30 can cover the area on the first wall 20b of each battery cell 20 except for the location of the electrode terminals 24.

[0146] The electrode terminal 24 can be avoided by providing a second hole 312 on the thermal management component 30, so that the orthographic projection of the thermal management component 30 on the first wall 20b and the orthographic projection of the electrode terminal 24 on the first wall 20b are staggered.

[0147] One embodiment of this application provides a battery device 100, which, through the above-described configuration, facilitates the assembly of the thermal management component 30 and meets the temperature control requirements between it and each battery cell 20. Furthermore, the above-described configuration also increases the heat exchange area between the component and the battery cell 20, ensuring a higher heat exchange rate.

[0148] In some optional embodiments, one embodiment of the present application provides a battery device 100, wherein a battery cell 20 includes a pair of electrode terminals 24 with opposite polarities, the pair of electrode terminals 24 being disposed opposite to each other on the first walls 20b on both sides of the housing 20a in the first direction X, and thermal management components 30 are respectively disposed on both sides of the battery cell 20 in the first direction X.

[0149] The outer casing 20a may have a first wall 20b on both sides in the first direction X. Each first wall 20b is provided with an electrode terminal 24. A thermal management component 30 is provided for each first wall 20b. The thermal management component 30 may be the structural form of the above embodiments, which will not be described in detail here.

[0150] The battery device 100 provided in one embodiment of this application, through the above-described configuration, can meet the functional requirements of the electrode terminals 24 led out on both sides of the battery device 100, and can ensure the heat exchange requirements and energy density improvement requirements under this configuration.

[0151] One embodiment of this application provides a battery device 100 in which the battery cells 20 are arranged in one of the following ways: upright, inverted, lying on their side, or lying flat.

[0152] One embodiment of this application provides a battery device 100, including a housing 10, battery cells 20, and a thermal management component 30. The housing 10 is square and has a receiving cavity 101. The housing 10 includes a housing body 10a and paired limiting beams 10b. The housing body 10a has the receiving cavity 101, and the limiting beams 10b are disposed in the receiving cavity 101 and connected to the housing body 10a. The battery cells 20 are disposed in the receiving cavity 101 and located between the paired limiting beams 10b. There are multiple battery cells 20, and multiple battery cells 20 are grouped to form multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells 20 stacked together. Each battery cell 20 includes a housing 20a, an electrode assembly 22, an electrode terminal 24, and a pressure relief component 25. The electrode assembly 22 is housed within the housing 20a. The housing 20a includes a shell 21 and a cover plate 23, and a first wall 20b is disposed on the cover plate 23. The electrode terminals 24 are arranged in pairs with opposite polarities, and are disposed on the first wall 20b on the same side of the electrode assembly in the first direction and electrically connected to the electrode assembly 22. The electrode terminals 24 are disposed along the first direction X and protrude from the first wall 20b to the side opposite to the electrode assembly 22. The pressure relief component 25 is disposed on the first wall 20b.

[0153] The thermal management component 30 is stacked on top of the first wall 20b. The orthographic projection of the thermal management component 30 on the first wall 20b is offset from the orthographic projection of the electrode terminal 24 on the first wall 20b. The thermal management component 30 is an integral structure and is connected to the limiting beam 10b, specifically by fasteners such as bolts. The thermal management component 30 is stacked on top of the first wall 20b of each battery cell 20. The thermal management component 30 has multiple first holes 311 and second holes 312. Each second hole 312 corresponds to and can be inserted into the electrode terminal 24 of the battery cell 20. Each first hole 311 is opposite to one of the pressure relief components 25, facilitating the gas release requirements of the pressure relief component 25. The thermal management component 30 is stacked on the first wall 20b, and the orthographic projection of the thermal management component 30 on the first wall 20b and the orthographic projection of the electrode terminal 24 on the first wall 20b are staggered from each other, so as to realize the temperature control of the battery cell 20 by the thermal management component 30. The thermal management component 30 has a first surface 30a facing the first wall 20b, and a side pointing from the first wall 20b to the thermal management component 30 along the first direction X. The electrode terminal 24 is at least partially protruding from the first surface 30a.

[0154] According to some embodiments of this application, this application also provides an electrical device including the battery device 100 described in any of the above embodiments, and the battery is used to provide electrical energy to the electrical device.

[0155] 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: The box-shaped enclosure has a receiving cavity; A battery cell is disposed in the receiving cavity. The battery cell includes a housing, an electrode assembly, and electrode terminals. The electrode assembly is housed within the housing. The housing includes a first wall. The electrode terminals are disposed on the first wall and electrically connected to the electrode assembly. The electrode terminals are disposed along a first direction and protrude from the first wall to a side opposite to the electrode assembly. A thermal management component is stacked on the first wall. Along the first direction, the orthographic projection of the thermal management component on the first wall is offset from the orthographic projection of the electrode terminal on the first wall. The thermal management component is used to regulate the temperature of the battery cell. The thermal management component has a first surface disposed toward the first wall, and a side of the component pointing toward the thermal management component along the first direction from the first wall, wherein the electrode terminal protrudes at least a portion of the first surface.

2. The battery device according to claim 1, wherein, Along a second direction, the thermal management component partially overlaps with the electrode terminal, and the second direction is at least one direction on a plane perpendicular to the first direction.

3. The battery device according to claim 1 or 2, wherein, The thermal management component is at least partially attached to the first wall; and / or, a connector is provided between the thermal management component and the first wall.

4. The battery device according to any one of claims 1 to 3, wherein, The enclosure includes a main body and a limiting beam. The main body has the receiving cavity. The limiting beam is disposed in the receiving cavity and connected to the main body. The thermal management component is connected to the limiting beam.

5. The battery device according to claim 4, wherein, The limiting beams are arranged in pairs and spaced apart. The battery cells are located between the pairs of limiting beams. The thermal management component includes a heat exchange body and a connecting structure. The heat exchange body is connected to the pairs of limiting beams. The connecting structure protrudes from the heat exchange body along the first direction.

6. The battery device according to any one of claims 1 to 5, wherein, The battery cell also includes a pressure relief component, which is used to release gas inside the battery cell; the pressure relief component is disposed on the first wall, and the thermal management component has a clearance part corresponding to the position of the pressure relief component.

7. The battery device according to claim 6, wherein, The clearance portion includes a first hole disposed on the thermal management component, the first hole being disposed through the thermal management component along the first direction.

8. The battery device according to claim 6, wherein, The clearance portion includes a recess provided on the thermal management component, the recess being recessed toward the side opposite to the housing.

9. The battery device according to any one of claims 1 to 8, wherein, The number of battery cells is multiple, and the thermal management component is an integral structure, which is stacked with the first wall of each battery cell.

10. The battery device according to any one of claims 1 to 8, wherein, The number of battery cells is multiple, and the number of thermal management components is multiple, with each thermal management component being stacked with a first wall of a portion of the battery cells.

11. The battery device according to claim 10, wherein, Multiple battery cells are grouped to form multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells arranged in an array. Each battery cell assembly is provided with a corresponding thermal management component. The thermal management component is stacked with at least a portion of the first wall of each battery cell in the same battery cell assembly.

12. The battery device according to claim 11, wherein, The battery cell includes paired electrode terminals with opposite polarities, the paired electrode terminals being located on the same side of the housing in a first direction, and a portion of each thermal management component being located between the paired electrode terminals of the same battery cell.

13. The battery device according to claim 10, wherein, Multiple battery cells are grouped to form multiple battery cell assemblies. Each battery cell assembly includes two or more battery cells arranged in an arrangement. Each battery cell assembly is provided with two or more thermal management components. At least one thermal management component is stacked with at least a portion of the first wall of each battery cell in two adjacent battery cell assemblies.

14. The battery device according to any one of claims 1 to 13, wherein, The battery cell includes a pair of electrode terminals with opposite polarities. The pair of electrode terminals are disposed opposite to each other on the first wall of the housing in a first direction. The battery cell is provided with the thermal management component on both sides of the first direction.

15. An electrical device comprising a battery device as described in any one of claims 1 to 14.

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