Battery device and electric device

Abstract

This application provides a battery device and an electrical device. The battery device includes a housing, battery cell assemblies, electrical connectors, and a retaining strip structure. Along a first direction, multiple battery cell assemblies are arranged within the housing, each battery cell assembly comprising multiple battery cells. These battery cells are arranged along a second direction. Along a third direction, an electrical connector is disposed on one side of each battery cell assembly. The electrical connector includes a bridging tab and an outer insulating layer. The bridging tab includes a main body and two connecting portions, which are respectively connected to opposite sides of the main body along the first direction. The outer insulating layer covers the main body, and the connecting portions are exposed outside the outer insulating layer. Adjacent rows of battery cell assemblies are electrically connected to the connecting portions. A retaining strip structure is disposed on one side of each battery cell assembly along the third direction and is connected to the housing. The bridging tab passes between the retaining strip structure and the battery cell assembly, and the retaining strip structure is connected to the housing. The first, second, and third directions are perpendicular to each other.

Description

Technical Field

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

[0002] 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. Improving battery safety has always been a key research direction in battery technology development. Utility Model Content

[0003] This application provides a battery device and an electrical device that improve the safety of the battery device.

[0004] This application provides a battery device, comprising a housing, battery cell assemblies, electrical connectors, and a pressure strip structure. Along a first direction, multiple battery cell assemblies are arranged within the housing, each assembly comprising multiple battery cells. These battery cells are arranged along a second direction. Along a third direction, electrical connectors are disposed on one side of the battery cell assemblies. Each electrical connector includes a bridging tab and an outer insulating layer. The bridging tab includes a main body and two connecting portions, which are respectively connected to opposite sides of the main body along the first direction. The outer insulating layer covers the main body, and the connecting portions are exposed outside the outer insulating layer. Adjacent rows of battery cell assemblies are electrically connected to the connecting portions. A pressure strip structure is disposed on one side of the battery cell assemblies along the third direction and is connected to the housing. The bridging tab passes between the pressure strip structure and the battery cell assemblies, and the pressure strip structure is connected to the housing. The first, second, and third directions are perpendicular to each other.

[0005] In the battery device of this application embodiment, adjacent battery cell assemblies are connected in series or parallel via electrical connectors. Along a third direction, the electrical connector and the pressure strip structure are disposed on the same side of the battery cell assembly. The electrical connector passes between the pressure strip structure and the battery cell, with a portion of the electrical connector located between the pressure strip structure and the battery cell assembly. The electrical connector and the pressure strip structure are arranged intersectingly. The electrical connector does not need to bypass or avoid the pressure strip structure, thus shortening the bridging path of the electrical connector. This helps to shorten the length of the bridging tab in the electrical connector, reducing the possibility of excessive voltage drop due to excessive connector length, improving the sampling accuracy of the battery device, and enhancing the safety of the battery device.

[0006] In some feasible implementations, there is a gap between the electrical connector and the pressure strip structure.

[0007] During the assembly of the battery device, there is a possibility of installation tolerances between the pressure strip structure and the electrical connectors. A gap between the electrical connectors and the pressure strip structure can absorb these installation tolerances and reduce the possibility of positional interference between the electrical connectors and the pressure strip structure, which could lead to mutual compression.

[0008] In some feasible ways, the pressure strip structure is bonded to the top cover of the battery cell.

[0009] The bonding method between the pressure strip structure and the top cover of the battery cell eliminates the need for additional connecting structures on the pressure strip structure and the top cover of the battery cell, reducing the processing difficulty of the pressure strip structure and the top cover of the battery cell. It also helps to reduce the connection difficulty between the pressure strip structure and the top cover of the battery cell, thus achieving convenient connection.

[0010] In some feasible embodiments, the main body includes a recessed structure that is recessed toward the top cover of the battery cell, and along a third direction, the recessed structure is located on the side of the pressure strip structure facing the battery cell.

[0011] The recessed structure of the jumper bar can avoid the first insulator in the third direction. The recessed structure of the jumper bar can reuse the space between the pressure strip structure and the battery cell module, improve the space utilization in the third direction, and reduce the space occupancy of the jumper bar in the third direction, reducing the possibility of needing to raise the high voltage strip structure in the third direction due to the installation of electrical connectors.

[0012] In some feasible implementations, the recessed structure includes a bottom wall and two side walls respectively connected to opposite sides of the bottom wall along a first direction, two transition portions respectively connected to the two side walls, the bottom wall including a clearance structure, a portion of the top cover of the battery cell exposed in the clearance structure, and a pressure strip structure bonded to the top cover through the clearance structure.

[0013] The end of the pressure strip structure is bonded to the top cover of the battery cell. The clearance structure can avoid a part of the top cover of the battery cell, thereby increasing the bonding area between the end of the pressure strip structure and the top cover of the battery cell and reducing the possibility that the bonding area between the end of the pressure strip structure and the top cover of the battery cell will be too small due to the installation of electrical connectors.

[0014] In some feasible embodiments, the recessed structure includes a bottom wall and two side walls respectively connected to opposite sides of the bottom wall along a first direction, two transition portions correspondingly connected to the two side walls, and the bottom wall includes a protrusion that extends beyond the transition portions along a second direction.

[0015] The bottom wall is provided with a corresponding protrusion so that the width of the bottom wall does not need to be reduced. This helps to reduce the possibility of excessive voltage drop due to excessive resistance of the bridging plate caused by the reduction of the overall width of the bottom wall.

[0016] In some feasible embodiments, the battery cell includes electrode terminals, an adapter is electrically connected to the electrode terminals, the adapter includes a transition section located between the electrode terminals and the recessed structure, the thickness of the transition section is H1, and the thickness of the recessed structure is H2, wherein 1 / 2≤H2 / H1≤2 / 3.

[0017] The relatively large thickness of the transition section helps improve its structural strength, impact resistance, and connection strength with the recessed structure. The relatively small thickness of the recessed structure reduces its space occupancy in the third direction, facilitating the reuse of space between the pressure strip structure and the battery cell assembly for electrical connectors.

[0018] In some feasible implementations, the recessed structure includes a bottom wall and two side walls respectively connected to opposite sides of the bottom wall along a first direction. Two transition portions are respectively connected to the two side walls. Along a second direction, the width of the bottom wall is greater than the width of the transition portions, so that the bottom wall has a relatively large cross-sectional area, reducing the possibility of excessive pressure drop on the bottom wall.

[0019] In some possible implementations, the battery cell includes electrode terminals, an adapter electrically connected to the electrode terminals, the adapter including a transition section located between the electrode terminals and the recessed structure, the pressure strip structure including a first insulator and a connecting reinforcement, at least a portion of the first insulator being located between the connecting reinforcement and the battery cell assembly, the connecting reinforcement being connected to the housing, and at least a portion of the transition section being located on the side of the pressure strip structure facing the battery cell.

[0020] The first insulating component can protect the transition section and reduce the possibility of the transition section being scratched or squeezed by other structural components.

[0021] In some feasible embodiments, the pressure strip structure includes a first insulating member and a connecting reinforcement member, at least a portion of the first insulating member being located between the connecting reinforcement member and the battery cell assembly, the connecting reinforcement member being connected to the housing, and a first recess being provided in the area of ​​the first insulating member facing the recessed structure, the thickness of the first insulating member decreasing at the first recess.

[0022] The first insulator is thinned at the first recess, thereby increasing the space between the first insulator and the battery cell assembly in the third direction to facilitate the avoidance of electrical connectors. This allows the thickness of the recessed structure to be designed to be relatively large, reducing the possibility of excessive voltage drop on the bridging pad.

[0023] In some feasible embodiments, the pressure strip structure includes a first insulating member and a connecting reinforcement member, at least a portion of the first insulating member being located between the connecting reinforcement member and the battery cell assembly, the connecting reinforcement member being connected to the housing, a second recess being provided on the side of the first insulating member facing away from the battery cell, the second recess extending along a second direction, a portion between the two ends of the connecting reinforcement member being accommodated within the second recess, and the two ends of the connecting reinforcement member extending beyond the first insulating member along the second direction.

[0024] The first insulating member and the connecting reinforcement are stacked along a third direction. A portion of the connecting reinforcement is accommodated within a second recess, such that the first insulating member can be constrained by the connecting reinforcement along the first direction, which helps to reduce the possibility of the first insulating member shifting position along the first direction.

[0025] In some feasible methods, the thickness of the outer insulation layer ranges from 0.1 mm to 0.4 mm.

[0026] The relatively small thickness of the outer insulation layer helps reduce the overall thickness of the electrical connector at the outer insulation layer, thus reducing the space occupancy of the electrical connector in the third direction. This allows the electrical connector to reuse the space between the pressure strip structure and the battery cell assembly. The electrical connector can pass between the pressure strip structure and the battery cell assembly without needing to raise the pressure strip structure.

[0027] In some feasible embodiments, the pressure strip structure includes a first insulating member, a connecting reinforcement member, and a second insulating member, with at least a portion of the first insulating member located between the connecting reinforcement member and the battery cell assembly, the connecting reinforcement member being connected to the housing, and the second insulating member covering the area between the two ends of the connecting reinforcement member.

[0028] The second insulating component can provide insulation and protection for the connecting reinforcement, reducing the possibility of conductive connections between the connecting reinforcement and electrical connectors or battery cell components, and improving the safety of the battery device.

[0029] This application provides an electrical device including the battery device described above. The battery device is used to provide electrical energy. Attached Figure Description

[0030] 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:

[0031] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0032] Figure 2This is a partially exploded structural diagram of a battery device provided in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the structure of a battery cell assembly provided in one embodiment of the application;

[0034] Figure 4 This is a partially exploded structural diagram of a battery cell provided in an embodiment of this application;

[0035] Figure 5 This is a partial structural schematic diagram of a battery device provided in an embodiment of this application;

[0036] Figure 6 This is a partially exploded structural diagram of a battery device provided in an embodiment of this application;

[0037] Figure 7 yes Figure 5 Enlarged view of point M in the middle;

[0038] Figure 8 This is a schematic diagram of the structure of an electrical connector provided in an embodiment of this application;

[0039] Figure 9 This is a partial cross-sectional view of an electrical connector provided in an embodiment of this application;

[0040] Figure 10 This is a partial cross-sectional view of a battery device provided in an embodiment of this application;

[0041] Figure 11 yes Figure 6 Enlarged view of point P in the middle;

[0042] Figure 12 This is a schematic diagram of the structure of a bridging bar provided in an embodiment of this application;

[0043] Figure 13 This is a partial cross-sectional view of a battery device provided in an embodiment of this application;

[0044] Figure 14 This is a partial cross-sectional view of the pressure strip structure provided in one embodiment of this application;

[0045] Figure 15 This is a partially exploded structural diagram of the pressure strip structure provided in one embodiment of this application.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Vehicle; 10. Battery assembly; 10a. Housing; 10b. First housing section; 10c. Second housing section;

[0048] 11. Controller; 12. Motor;

[0049] 20. Battery cell modules;

[0050] 30. Battery cell;

[0051] 40. Top cover; 41. Electrode terminals;

[0052] 50. Shell;

[0053] 60. Electrode assembly;

[0054] 70. Electrical connectors;

[0055] 71. Bridging plate; 711. Adapter part; 7111. Transition section; 712. Recessed structure; 712a. Protrusion; 712b. Clearance notch; 712c. Clearance hole; 7121. Bottom wall; 7122. Side wall;

[0056] 72. Outer insulation layer;

[0057] 80. Pressure strip structure; 81. First insulating component; 811. First recess; 812. Second recess; 82. Connecting reinforcement; 83. Second insulating component;

[0058] X, first direction;

[0059] Y, second direction;

[0060] Z, Third-party orientation. Detailed Implementation

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied 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 battery device applications, market demand is also constantly increasing.

[0068] In this application, the battery cell may include a lithium-ion secondary battery cell, a lithium-ion primary battery cell, a lithium-sulfur battery cell, a sodium-lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and the embodiments of this application are not limited thereto. The battery cell may be flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited thereto.

[0069] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. The battery device mentioned in this application can be a battery pack. For example, the battery device mentioned in this application can include battery cell assemblies, etc. A battery device generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0070] Multiple battery cell assemblies are housed within the enclosure. Adjacent battery cell assemblies are fitted with a retaining strip and an electrical connector. The retaining strip provides restraint to the battery cells, improving their resistance to vibration and shock. The ends of the retaining strip are fixedly connected to the enclosure, forming a connection structure. Adjacent battery cell assemblies are connected in series or parallel via the electrical connector. The two ends of the electrical connector are electrically connected to the battery cells closest to the ends of the two battery cell assemblies. The electrical connector needs to bypass the connection structure between the retaining strip and the enclosure, increasing its length and resulting in excessive voltage drop across it. This negatively impacts the sampling accuracy of the battery device and affects its safety. The bypassed portion of the electrical connector is located on the outer side of the battery cell assembly ends.

[0071] To alleviate the problem of excessive voltage drop on electrical connectors, the electrical connectors can be arranged to cross the pressure strip structure, with the electrical connectors passing between the pressure strip structure and the battery cell. This shortens the length of the electrical connectors and reduces the possibility of excessive voltage drop.

[0072] Based on the above considerations, to alleviate the problem of excessive voltage drop on the electrical connectors, the inventors, after in-depth research, designed a battery device. In this battery device, the electrical connectors and the pressure strip structure are located on the same side of the battery cell assembly. The electrical connectors and the pressure strip structure are arranged in an intersecting manner. The electrical connectors pass between the pressure strip structure and the battery cell, which helps to shorten the bridging path of the electrical connectors, shorten the length of the electrical connectors themselves, reduce the possibility of excessive voltage drop on the electrical connectors, improve the sampling accuracy of the battery device, and enhance the safety of the battery device.

[0073] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0074] Electrical devices can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. 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. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. 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. This application does not impose any special limitations on the above-mentioned electrical devices.

[0075] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical devices described above, but can also be applied to all battery devices including housings and electrical devices using battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0076] See Figure 1 As shown, 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. A battery device 10 is installed inside vehicle 1. The battery device 10 can be located at the bottom, front, or rear of vehicle 1. The battery device 10 can be used to power vehicle 1. For example, the battery device 10 can serve as the operating power source for vehicle 1. Vehicle 1 may also include a controller 11 and a motor 12. The controller 11 is used to control the battery device 10 to supply power to the motor 12. For example, this is for the power needs of vehicle 1 during starting, navigation, and driving.

[0077] In some embodiments of this application, the battery device 10 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1.

[0078] To meet different power demands, the battery device 10 may include multiple battery cells. A battery cell is the smallest unit that makes up a battery cell assembly or battery pack. Multiple battery cells can be connected in series and / or in parallel via electrode terminals for various applications. The battery device mentioned in this application includes battery cell assemblies or battery packs. Multiple battery cells can be connected in series, in parallel, or in a mixed configuration. A mixed configuration refers to a combination of series and parallel connections. In the embodiments of this application, multiple battery cells can be directly assembled into a battery pack, or they can first be assembled into battery cell assemblies, and then the battery cell assemblies can be assembled into a battery pack.

[0079] See Figure 2As shown, the battery device 10 includes a housing 10a and individual battery cells (not shown). The individual battery cells are housed within the housing 10a.

[0080] The housing 10a can be a simple three-dimensional structure such as a single 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 10a 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.

[0081] The housing 10a is used to accommodate individual battery cells, and the housing 10a can have various structures. In some embodiments, the housing 10a may include a first housing portion 10b and a second housing portion 10c. The first housing portion 10b and the second housing portion 10c overlap each other. The first housing portion 10b and the second housing portion 10c together define a receiving space for accommodating the individual battery cells. The second housing portion 10c may be a hollow structure with one open end. In some embodiments, the first housing portion 10b is a plate-like structure. The first housing portion 10b overlaps the open side of the second housing portion 10c to form a housing 10a with a receiving space. In some embodiments, both the first housing portion 10b and the second housing portion 10c may also be hollow structures with one open side. The open side of the first housing portion 10b overlaps the open side of the second housing portion 10c to form a housing 10a with a receiving space. Of course, the first housing portion 10b and the second housing portion 10c can have various shapes, such as cylinders, cuboids, etc.

[0082] To improve the sealing performance after the first housing part 10b and the second housing part 10c are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 10b and the second housing part 10c.

[0083] In some embodiments, the first housing portion 10b covers the top of the second housing portion 10c. The first housing portion 10b may also be referred to as the upper housing cover, and the second housing portion 10c may also be referred to as the lower housing.

[0084] In the battery device 10, there can be one or more battery cells. When there are multiple battery cells, they can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells are connected in both series and parallel. Multiple battery cells can be directly connected in series, parallel, or in a mixed configuration and then housed within the housing 10a. Alternatively, multiple battery cells can first be connected in series, parallel, or in a mixed configuration to form a battery cell assembly. The multiple battery cell assemblies can then be connected in series, parallel, or in a mixed configuration to form a whole and housed within the housing 10a.

[0085] In some embodiments, see Figure 3 As shown, there can be multiple battery cells 30. Multiple battery cells 30 are first connected in series, parallel, or in a mixed manner to form a battery cell assembly 20. Multiple battery cell assemblies 20 are then connected in series, parallel, or in a mixed manner to form a whole, which is housed within the casing 10a.

[0086] Multiple battery cells 30 in the battery cell assembly 20 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 30 in the battery cell assembly 20.

[0087] In this embodiment, the battery cell 30 may include a lithium-ion battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, etc., and this embodiment is not limited thereto. The battery cell 30 may be flat, cuboid, or other shapes, and this embodiment is not limited thereto either. However, for the sake of brevity, the following embodiment uses a cuboid battery cell 30 as an example for illustration.

[0088] Battery cell 30 refers to the smallest unit that makes up battery device 10. See also Figure 4 As shown, the battery cell 30 includes a top cover 40, a housing 50, and an electrode assembly 60.

[0089] The top cover 40 refers to a component that closes onto the opening of the housing 50 to isolate the internal environment of the battery cell 30 from the external environment. Exemplarily, the shape of the top cover 40 can be adapted to the shape of the housing 50 to fit it. Exemplarily, the top cover 40 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the top cover 40 is not easily deformed under pressure or impact, enabling the battery cell 30 to have higher structural strength and improved safety performance. Functional components such as electrode terminals 41 can be provided on the top cover 40. The electrode terminals 41 can be used for electrical connection with the electrode assembly 60 to output or input electrical energy to the battery cell 30.

[0090] In some embodiments, the top cover 40 may also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 30 reaches a threshold. The top cover 40 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating component may also be provided on the inner side of the top cover 40. The insulating component can be used to isolate the electrical connection components within the housing 50 from the top cover 40 to reduce the risk of short circuits. Exemplarily, the insulating component can be plastic, rubber, etc.

[0091] The housing 50 is a component used to cooperate with the top cover 40 to form the internal environment of the battery cell 30. The formed internal environment can accommodate the electrode assembly 60, electrolyte (not shown in the figure), and other components. The housing 50 and the top cover 40 can be independent components. An opening can be provided on the housing 50, and the top cover 40 closes the opening to form the internal environment of the battery cell 30. Alternatively, the top cover 40 and the housing 50 can be integrated. Specifically, the top cover 40 and the housing 50 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 50, the top cover 40 closes the housing 50. The housing 50 can be of various shapes and sizes, such as cuboid, hexagonal prism, etc. Specifically, the shape of the housing 50 can be determined according to the specific shape and size of the electrode assembly 60. The material of the housing 50 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment does not impose any special limitations on this.

[0092] See Figures 5 to 8 As shown, some embodiments of this application provide a battery device 10, including a housing 10a, a battery cell assembly 20, an electrical connector 70, and a pressure strip structure 80.

[0093] Along the first direction X, multiple battery cell assemblies 20 are arranged within the housing 10a. Each battery cell assembly 20 includes multiple battery cells 30, which are arranged along the second direction Y. Along the third direction Z, an electrical connector 70 is disposed on one side of the battery cell assembly 20. The electrical connector 70 includes a jumper 71 and an outer insulating layer 72. The jumper 71 includes a main body and two adapter portions 711. The two adapter portions 711 are respectively connected to opposite sides of the main body along the first direction X. The outer insulating layer 72 covers the main body, and the adapter portions 711 are exposed outside the outer insulating layer 72. Two adjacent rows of battery cell assemblies 20 are electrically connected to the adapter portions 711. A pressure strip structure 80 is disposed on one side of the battery cell assembly 20 along the third direction Z, and the pressure strip structure 80 is connected to the housing 10a. The jumper 71 passes between the pressure strip structure 80 and the battery cell assembly 20. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0094] In some feasible implementations, an electrical connector 70 is provided between two adjacent battery cell assemblies 20 to enable series or parallel connection. In some examples, two battery cells 30 located at the same end of two adjacent battery cell assemblies 20 are electrically connected to two adapter portions 711 of the electrical connector 70, respectively.

[0095] In some feasible implementations, a retaining strip structure 80 is provided between two adjacent battery cell assemblies 20. In the two adjacent battery cell assemblies 20, the shoulder of the battery cell 30 is correspondingly positioned with respect to the retaining strip structure 80. The shoulder of the battery cell 30 refers to the portion of the top cover 40 located outside the electrode terminal 41 along the first direction X.

[0096] In this embodiment of the application, when the housing 10a experiences vibration along the third direction Z, the pressure strip structure 80 can limit the battery cell 30, reduce the possibility of the battery cell 30 vibrating significantly, and improve the stability of the battery cell 30.

[0097] In this embodiment, the pressure strip structure 80 is connected to the housing 10a. For example, along the second direction Y, both ends of the pressure strip structure 80 are respectively connected and fixed to the housing 10a. During the charging and discharging process, the battery cell assembly 20 may expand along the second direction Y. The pressure strip structure 80 can constrain the battery cell assembly 20 in the second direction Y, reducing the expansion amount of the battery cell assembly 20 and improving the safety of the battery device 10.

[0098] In this embodiment, a jumper 71 is disposed between the pressure strip structure 80 and the battery cell 30. The jumper 71 passes through the pressure strip structure 80 and the battery cell assembly 20. The jumper 71 is intersecting with the pressure strip structure 80. An outer insulating layer 72 is provided in the area corresponding to the jumper 71 and the pressure strip structure 80. The outer insulating layer 72 isolates the jumper 71 from the top cover 40 of the battery cell 30. The electrical connector 70 can reuse the space between the pressure strip structure 80 and the battery cell assembly 20.

[0099] In some feasible ways, the material of the outer insulating layer 72 may include, but is not limited to, polyimide (PI) and polyethylene terephthalate (PET).

[0100] In some feasible implementations, the housing 10a is a structural member with a predetermined length and width. The first direction X can be the same as the width direction of the housing 10a, the second direction Y can be the same as the length direction of the housing 10a, and the third direction Z can be the same as the height direction of the housing 10a.

[0101] In this embodiment of the battery device 10, adjacent battery cell assemblies 20 are connected in series or in parallel via electrical connectors 70. Along the third direction Z, the electrical connectors 70 and the pressure strip structure 80 are disposed on the same side of the battery cell assembly 20. The electrical connector 70 passes between the pressure strip structure 80 and the battery cell 30, with a portion of the electrical connector 70 located between the pressure strip structure 80 and the battery cell assembly 20. The electrical connectors 70 and the pressure strip structure 80 are intersecting. The electrical connector 70 does not need to bypass or avoid the pressure strip structure 80, thus shortening the bridging path of the electrical connector 70. This helps to shorten the length of the bridging tab 71 in the electrical connector 70, reducing the possibility of excessive voltage drop due to excessive length of the electrical connector 70, improving the sampling accuracy of the battery device 10, and enhancing the safety of the battery device 10.

[0102] In some feasible implementations, there is a gap between the electrical connector 70 and the pressure strip structure 80. The electrical connector 70 and the pressure strip structure 80 are in a non-contact state.

[0103] During the assembly of the battery device 10, there is a possibility of installation tolerance between the pressure strip structure 80 and the electrical connector 70. The spacing between the electrical connector 70 and the pressure strip structure 80 can absorb installation tolerances and reduce the possibility of positional interference between the electrical connector 70 and the pressure strip structure 80, which could lead to mutual compression.

[0104] When the housing 10a experiences vibration along the third direction Z, the electrical connector 70 and the pressure strip structure 80 are less likely to come into contact, reducing the possibility of the pressure strip structure 80 and the electrical connector 70 coming into contact and rubbing or scratching against each other.

[0105] In some possible implementations, the pressure strip structure 80 includes a first insulating member 81 and a connecting reinforcement member 82. At least a portion of the first insulating member 81 is located between the connecting reinforcement member 82 and the battery cell assembly 20. The connecting reinforcement member 82 is connected to the housing 10a.

[0106] The first insulating member 81 in the pressure strip structure 80 can insulate and isolate the connecting reinforcement 82 and the top cover 40 of the battery cell 30. The first insulating member 81 can also insulate and isolate the connecting reinforcement 82 and the electrical connector 70. The connecting reinforcement 82 in the pressure strip structure 80 is connected to the housing 10a. For example, along the second direction Y, both ends of the connecting reinforcement 82 are respectively connected and fixed to the housing 10a.

[0107] There is a gap between the electrical connector 70 and the first insulator 81. The electrical connector 70 and the first insulator 81 are in a non-contact state.

[0108] In some examples, the material of the first insulating member 81 includes, but is not limited to, plastic. The connecting reinforcement 82 is a metal structural member. The material of the connecting reinforcement 82 includes, but is not limited to, steel, aluminum, or aluminum alloy.

[0109] In some examples, the connecting reinforcement 82 is detachably connected to the housing 10a by fasteners such as screws.

[0110] In some examples, the first insulator 81 is an insulating plate. The connecting reinforcement 82 is a connecting reinforcement plate. The first insulator 81 and the connecting reinforcement 82 are stacked along the third direction Z. The connecting reinforcement 82 is located on the side of the first insulator 81 facing away from the battery cell assembly 20.

[0111] In some feasible ways, the pressure strip structure 80 is bonded to the top cover 40 of the battery cell 30, which helps to improve the connection stability and reliability of the pressure strip structure 80 and improve the overall structural strength of the battery device 10.

[0112] The bonding method between the pressure strip structure 80 and the top cover 40 of the battery cell 30 eliminates the need for additional connecting structures on the pressure strip structure 80 and the top cover 40 of the battery cell 30, reducing the processing difficulty of the pressure strip structure 80 and the top cover 40 of the battery cell 30. It also helps to reduce the connection difficulty between the pressure strip structure 80 and the top cover 40 of the battery cell 30, thus achieving convenient connection.

[0113] In some examples, adhesive is applied to the top cover 40 of the battery cell 30, and then the pressure strip structure 80 is bonded to the adhesive.

[0114] In some examples, the pressure strip structure 80 includes a first insulating member 81 and a connecting reinforcement member 82. At least a portion of the first insulating member 81 is located between the connecting reinforcement member 82 and the battery cell assembly 20. The first insulating member 81 is bonded to the top cover 40 of the battery cell 30. The first insulating member 81 and the connecting reinforcement member 82 are bonded together.

[0115] See also some of the possible implementation methods. Figure 9 and Figure 10 As shown, the main body of the bridging strip 71 includes a recessed structure 712. The recessed structure 712 is recessed toward the battery cell assembly 20. Along the third direction Z, the recessed structure 712 is located on the side of the pressure strip structure 80 facing the battery cell assembly 20.

[0116] Along the first direction X, transition portions 711 are respectively provided on both sides of the recessed structure 712. An outer insulating layer 72 covers the recessed structure 712.

[0117] The recessed structure 712 of the jumper bar 71 can avoid the first insulator 81 in the third direction Z. The recessed structure 712 of the jumper bar 71 can reuse the space between the pressure strip structure 80 and the battery cell assembly 20, improve the space utilization rate in the third direction Z, and at the same time reduce the space occupancy rate of the jumper bar 71 in the third direction Z, reducing the possibility that the high voltage strip structure 80 needs to be raised in the third direction Z due to the installation of the electrical connector 70.

[0118] In some examples, the pressure strip structure 80 includes a first insulator 81 and a connecting reinforcement 82. The first insulator 81 isolates the connecting reinforcement 82 and the electrical connector 70. A jumper 71 passes between the first insulator 81 and the battery cell assembly 20. Along the third direction Z, the first insulator 81 is disposed corresponding to the recessed structure 712. The orthographic projection of the first insulator 81 along the third direction Z intersects with the orthographic projection of the jumper 71 along the third direction Z.

[0119] See also some of the possible implementation methods. Figure 11 and Figure 12 As shown, the recessed structure 712 includes a bottom wall 7121 and two side walls 7122 respectively connected to opposite sides of the bottom wall 7121 along a first direction X. Two connecting portions 711 are respectively connected to the two side walls 7122. The bottom wall 7121 includes a clearance structure. A portion of the top cover 40 of the battery cell 30 is exposed through the clearance structure, and the pressure strip structure 80 is bonded to the top cover 40 through the clearance structure.

[0120] The end of the pressure strip structure 80 is bonded to the top cover 40 of the battery cell 30. The avoidance structure can avoid a part of the top cover 40 of the battery cell 30, so as to increase the bonding area between the end of the pressure strip structure 80 and the top cover 40 of the battery cell 30, and reduce the possibility that the bonding area between the end of the pressure strip structure 80 and the top cover 40 of the battery cell 30 is too small due to the setting of the electrical connector 70.

[0121] During the charging and discharging process of the battery cell assembly 20, the expansion deformation at the end position of the battery cell assembly 20 is generally greater than that at the middle position. Therefore, increasing the bonding area between the end of the pressure strip structure 80 and the top cover 40 of the battery cell 30 located at the end position is beneficial to improving the overall structural strength of the battery device 10.

[0122] In some examples, the ends of the pressure strip structure 80 and the top cover 40 of the battery cell 30 are bonded together with adhesive. The clearance structure is filled with adhesive.

[0123] In some examples, the adapter 711 is connected to the top end of the side wall 7122 away from the bottom wall 7121.

[0124] See also some of the possible implementation methods. Figure 11 and Figure 12 As shown, the clearance structure includes a clearance notch 712b. A portion of the top cover 40 of the battery cell 30 is exposed through the clearance notch 712b. In some examples, the clearance notch 712b is located near the end of the battery cell assembly 20.

[0125] See also some of the possible implementation methods. Figure 11 and Figure 12 As shown, the clearance structure includes clearance hole 712c. A portion of the top cover 40 of the battery cell 30 is exposed through clearance hole 712c.

[0126] The end of the pressure strip structure 80 is bonded to the top cover 40 of the battery cell 30. The clearance hole 712c can avoid a part of the top cover 40 of the battery cell 30, so as to increase the bonding area between the end of the pressure strip structure 80 and the top cover 40 of the battery cell 30, and reduce the possibility that the bonding area between the end of the pressure strip structure 80 and the top cover 40 of the battery cell 30 is too small due to the setting of the electrical connector 70.

[0127] In some examples, the end of the pressure strip structure 80 and the top cover 40 of the battery cell 30 are bonded together with adhesive. The clearance hole 712c is filled with adhesive.

[0128] In some examples, the clearance structure includes both clearance notch 712b and clearance hole 712c.

[0129] In some possible implementations, the bottom wall 7121 includes a protrusion 712a that extends beyond the transition portion 711 along the second direction Y.

[0130] A protrusion 712a is provided on the bottom wall 7121 to ensure that the width of the bottom wall 7121 is not reduced. This helps to reduce the possibility of excessive voltage drop due to excessive resistance of the bridging plate 71 caused by a reduction in the overall width of the bottom wall 7121. The width of the bottom wall 7121 refers to the dimension along the second direction Y.

[0131] In some possible implementations, the bottom wall 7121 includes a protrusion 712a and a clearance structure. The protrusion 712a extends beyond the transition portion 711 along the second direction Y.

[0132] When a clearance structure is provided on the bottom wall 7121, a corresponding protrusion 712a is provided on the bottom wall 7121. This ensures that the width of the bottom wall 7121 at the clearance structure does not decrease. This helps reduce the possibility that the overall width of the bottom wall 7121 would decrease due to the clearance structure, leading to excessive resistance and voltage drop in the bridging tab 71. The width of the bottom wall 7121 refers to the dimension along the second direction Y.

[0133] In some examples, the clearance structure includes a clearance notch 712b. The protrusion 712a and the clearance notch 712b are disposed opposite each other along a second direction Y.

[0134] In some examples, the clearance structure includes both a clearance notch 712b and a clearance hole 712c. Along the second direction Y, the clearance hole 712c is located between the protrusion 712a and the clearance notch 712b.

[0135] See also some of the possible implementation methods. Figure 9 and Figure 10 As shown, the battery cell 30 includes an electrode terminal 41. An adapter 711 is electrically connected to the electrode terminal 41. The adapter 711 includes a transition section 7111 located between the electrode terminal 41 and the recessed structure 712. The thickness of the transition section 7111 is H1, and the thickness of the recessed structure 712 is H2, wherein 1 / 2 ≤ H2 / H1 ≤ 2 / 3.

[0136] The relatively large thickness of the transition section 7111 is beneficial to improving the structural strength of the transition section 7111, its impact resistance, and the connection strength between the transition section 7111 and the recessed structure 712. The relatively small thickness of the recessed structure 712 is beneficial to reducing the space occupancy of the recessed structure 712 in the third direction Z, so as to facilitate the use of space between the pressure strip structure 80 and the battery cell assembly 20 for the placement of the electrical connector 70.

[0137] In some examples, the battery assembly 10 includes a first housing portion 10b. A space is provided between the pressure strip structure 80 and the first housing portion 10b along the third direction Z. This space is used to accommodate dimensional tolerances in the third direction Z after the battery cell assembly 20 is installed in the housing 10a. This space can also be used to fill adhesive to bond the pressure strip structure 80 and the first housing portion 10b together. The thickness of the recessed structure 712 is relatively small, reducing the possibility that the pressure strip structure 80 will be raised due to the installation of the electrical connector 70, resulting in insufficient space between the pressure strip structure 80 and the first housing portion 10b.

[0138] In some examples, the thickness of the recessed structure 712 is from 0.8 mm to 1.2 mm. Exemplarily, the thickness of the recessed structure 712 is 0.8 mm, 0.9 mm, 1.0 mm, 1.1 mm, and 1.2 mm.

[0139] In some examples, the width of the recessed structure 712 is greater than the width of the transition section 7111. The widths of the recessed structure 712 and the transition section 7111 refer to the dimensions along the second direction Y.

[0140] In some feasible embodiments, the recessed structure 712 includes a bottom wall 7121 and two side walls 7122 respectively connected to opposite sides of the bottom wall 7121 along a first direction X. Two transition portions 711 are respectively connected to the two side walls 7122. Along a second direction Y, the width of the bottom wall 7121 is greater than the width of the transition portions 711, so that the bottom wall 7121 has a relatively large cross-sectional area, reducing the possibility of excessive pressure drop on the bottom wall 7121.

[0141] In some examples, electrode terminal 41 is welded to adapter 711.

[0142] See also some of the possible implementation methods. Figure 10 As shown, the battery cell 30 includes an electrode terminal 41. An adapter 711 is electrically connected to the electrode terminal 41. The adapter 711 includes a transition section 7111 located between the electrode terminal 41 and the recessed structure 712. The pressure strip structure 80 includes a first insulating member 81 and a connecting reinforcement member 82, at least a portion of the first insulating member 81 being located between the connecting reinforcement member 82 and the battery cell assembly 20. The connecting reinforcement member 82 is connected to the housing 10a.

[0143] At least part of the transition section 7111 is located on the side of the first insulating member 81 facing the battery cell 30.

[0144] The first insulating element 81 can protect the transition section 7111, reducing the possibility of the transition section 7111 scraping or being squeezed by other structural components.

[0145] In some examples, along the first direction X, the edge of the first insulating member 81 extends to the side of the transition section 7111 facing away from the battery cell assembly 20. The orthographic projection of the first insulating member 81 along the third direction Z overlaps with the orthographic projection of the transition section 7111 along the third direction Z.

[0146] See also some of the possible implementation methods. Figure 13 As shown, the pressure strip structure 80 includes a first insulating member 81 and a connecting reinforcement member 82. A first recess 811 is provided in the region of the first insulating member 81 facing the recessed structure 712. The thickness of the first insulating member 81 decreases at the first recess 811. The thickness of the first insulating member 81 refers to the dimension along the third direction Z.

[0147] The first insulating member 81 forms a stepped structure at the first recess 811. The first insulating member 81 is thinned at the first recess 811, thereby increasing the space between the first insulating member 81 and the battery cell assembly 20 in the third direction Z, so as to avoid the electrical connector 70, so that the thickness of the recessed structure 712 can be designed to be relatively large, reducing the possibility of excessive voltage drop on the bridging tab 71.

[0148] In some examples, along the third direction Z, at least part of the recessed structure 712 is located within the first recess 811.

[0149] See also some of the possible implementation methods. Figure 14 and Figure 15 As shown, the pressure strip structure 80 includes a first insulating member 81 and a connecting reinforcement member 82. At least a portion of the first insulating member 81 is located between the connecting reinforcement member 82 and the battery cell assembly 20. The connecting reinforcement member 82 is connected to the housing 10a. A second recess 812 is provided on the side of the first insulating member 81 facing away from the battery cell 30. The second recess 812 extends along a second direction Y. A portion between the two ends of the connecting reinforcement member 82 is accommodated within the second recess 812. Along the second direction Y, both ends of the connecting reinforcement member 82 extend beyond the first insulating member 81.

[0150] The first insulating member 81 and the connecting reinforcement 82 are stacked along the third direction Z. A portion of the connecting reinforcement 82 is accommodated within the second recess 812, such that the first insulating member 81 can be constrained by the connecting reinforcement 82 along the first direction X, which helps to reduce the possibility of the first insulating member 81 shifting position along the first direction X.

[0151] In some examples, the first insulating member 81 includes a base plate, side plates, and flanges. Side plates are respectively provided on both sides of the base plate along a first direction X. The base plate and the two side plates form a second recess 812. Flanges are provided on the side plates.

[0152] In some examples, along the third direction Z, the portion of the connecting reinforcement 82 located within the second recess 812 does not protrude from the first insulator 81.

[0153] In some feasible ways, the thickness of the outer insulation layer 72 ranges from 0.1 mm to 0.4 mm.

[0154] The relatively small thickness of the outer insulation layer 72 helps to reduce the overall thickness of the electrical connector 70 at the outer insulation layer 72, thereby reducing the space occupancy of the electrical connector 70 in the third direction Z. This allows the electrical connector 70 to reuse the space between the pressure strip structure 80 and the battery cell assembly 20. The electrical connector 70 can pass between the pressure strip structure 80 and the battery cell assembly 20 without needing to raise the pressure strip structure 80.

[0155] In some examples, the thickness of the outer insulation layer 72 ranges from 0.1 mm, 0.2 mm, 0.3 mm, to 0.4 mm.

[0156] See also some of the possible implementation methods. Figure 14 and Figure 15As shown, the pressure strip structure 80 includes a first insulating member 81, a connecting reinforcement member 82, and a second insulating member 83. At least a portion of the first insulating member 81 is located between the connecting reinforcement member 82 and the battery cell assembly 20. The connecting reinforcement member 82 is connected to the housing 10a. The second insulating member 83 covers the area between the two ends of the connecting reinforcement member 82.

[0157] The second insulating member 83 can provide insulation and protection for the connecting reinforcement member 82, reduce the possibility of conductive connection between the connecting reinforcement member 82 and the electrical connector 70 or the battery cell assembly 20, and improve the safety of the battery device 10.

[0158] In some examples, along the second direction Y, the two ends of the connecting reinforcement 82 extend beyond the second insulator 83.

[0159] In some examples, along the second direction Y, the two ends of the second insulator 83 extend beyond the first insulator 81.

[0160] In some examples, the second insulating element 83 is an insulating film.

[0161] According to some embodiments of this application, this application also provides an electrical device including a battery device 10 of any of the above schemes, and the battery device 10 is used to provide electrical energy to the electrical device.

[0162] The power supply device can be any of the aforementioned devices or systems that utilize battery device 10.

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

Claims

1. A battery device, characterized in that, include: Box; A battery cell assembly, along a first direction, wherein multiple battery cell assemblies are arranged in the housing, and each battery cell assembly includes multiple battery cells, which are arranged along a second direction; An electrical connector, along a third direction, is disposed on one side of the battery cell assembly. The electrical connector includes a bridging tab and an outer insulating layer. The bridging tab includes a main body and two adapter portions. The two adapter portions are respectively connected to opposite sides of the main body along the first direction. The outer insulating layer covers the main body, and the adapter portions are exposed outside the outer insulating layer. Two adjacent rows of battery cell assemblies are respectively electrically connected to the adapter portions. A pressure strip structure is disposed on one side of the battery cell assembly along the third direction, the pressure strip structure is connected to the housing, and the bridging bar is inserted between the pressure strip structure and the battery cell assembly; The first direction, the second direction, and the third direction are perpendicular to each other.

2. The battery device according to claim 1, characterized in that, There is a gap between the electrical connector and the pressure strip structure.

3. The battery device according to claim 1, characterized in that, The pressure strip structure is bonded to the top cover of the battery cell.

4. The battery device according to any one of claims 1 to 3, characterized in that, The main body includes a recessed structure that is recessed toward the top cover of the battery cell, and along the third direction, the recessed structure is located on the side of the pressure strip structure facing the battery cell.

5. The battery device according to claim 4, characterized in that, The recessed structure includes a bottom wall and two side walls respectively connected to opposite sides of the bottom wall along the first direction. The two transition parts are respectively connected to the two side walls. The bottom wall includes a clearance structure. A portion of the top cover of the battery cell is exposed in the clearance structure. The pressure strip structure is bonded to the top cover through the clearance structure.

6. The battery device according to claim 4, characterized in that, The recessed structure includes a bottom wall and two side walls respectively connected to opposite sides of the bottom wall along the first direction. The two transition portions are respectively connected to the two side walls. The bottom wall includes a protrusion that extends beyond the transition portion along the second direction.

7. The battery device according to claim 4, characterized in that, The battery cell includes an electrode terminal, and the adapter is electrically connected to the electrode terminal. The adapter includes a transition section located between the electrode terminal and the recessed structure. The thickness of the transition section is H1, and the thickness of the recessed structure is H2, wherein 1 / 2 ≤ H2 / H1 ≤ 2 / 3.

8. The battery device according to claim 4, characterized in that, The recessed structure includes a bottom wall and two side walls respectively connected to opposite sides of the bottom wall along the first direction. The two transition portions are respectively connected to the two side walls. Along the second direction, the width of the bottom wall is greater than the width of the transition portions.

9. The battery device according to claim 4, characterized in that, The battery cell includes electrode terminals, and the adapter is electrically connected to the electrode terminals. The adapter includes a transition section located between the electrode terminals and the recessed structure. The pressure strip structure includes a first insulating member and a connecting reinforcement member, at least a portion of the first insulating member being located between the connecting reinforcement member and the battery cell assembly, and the connecting reinforcement member being connected to the housing. At least a portion of the transition section is located on the side of the first insulator facing the battery cell.

10. The battery device according to claim 4, characterized in that, The pressure strip structure includes a first insulating member and a connecting reinforcement member. At least a portion of the first insulating member is located between the connecting reinforcement member and the battery cell assembly. The connecting reinforcement member is connected to the housing. The first insulating member has a first recess in the area facing the recessed structure. The thickness of the first insulating member decreases at the first recess.

11. The battery device according to any one of claims 1 to 3, characterized in that, The pressure strip structure includes a first insulating member and a connecting reinforcement member. At least a portion of the first insulating member is located between the connecting reinforcement member and the battery cell assembly. The connecting reinforcement member is connected to the housing. A second recess is provided on the side of the first insulating member facing away from the battery cell. The second recess extends along the second direction. A portion between the two ends of the connecting reinforcement member is accommodated in the second recess. Along the second direction, the two ends of the connecting reinforcement member extend beyond the first insulating member.

12. The battery device according to any one of claims 1 to 3, characterized in that, The thickness of the outer insulation layer ranges from 0.1 mm to 0.4 mm.

13. The battery device according to any one of claims 1 to 3, characterized in that, The pressure strip structure includes a first insulating member, a connecting reinforcement member, and a second insulating member. At least a portion of the first insulating member is located between the connecting reinforcement member and the battery cell assembly. The connecting reinforcement member is connected to the housing. The second insulating member covers the area between the two ends of the connecting reinforcement member.

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

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