Battery device and electric device

Abstract

This application provides a battery device and an electrical device, belonging to the field of battery technology. The battery device includes: a housing and a battery cell. The housing includes a first part and a second part, which overlap each other to define a receiving cavity. The first part includes a first region and a second region arranged along a first direction, with the first region connected to opposite sides of the second region. The first region has a collapsible structure, and the second region has a rigid structure. The first part also includes a seat crossbeam, at least a portion of which is located in the second region to form a rigid structure. The battery cell is housed within the receiving cavity and connected to the second region of the first part. In the battery device of this application embodiment, the housing has strong side-impact protection performance, which can improve the protection performance of the battery cell.

Description

Technical Field

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

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

[0003] The battery pack housing is used to house individual battery cells. When the housing is subjected to a side impact, if its side impact protection is weak, it can easily lead to internal deformation under pressure, causing structural components to intrude into the area where the battery cells are located. This could potentially trigger thermal runaway in the battery pack and reduce its overall safety performance. Utility Model Content

[0004] This application aims to at least address one of the technical problems existing in the background art. Therefore, one objective of this application is to provide a battery device and an electrical device to improve the side-impact protection performance of the housing.

[0005] An embodiment of the first aspect of this application provides a battery device, the battery device comprising: a housing and a battery cell, the housing comprising a first portion and a second portion, the first portion and the second portion being closed to define a receiving cavity, the first portion comprising a first region and a second region arranged along a first direction, the first region being connected to opposite sides of the second region, the first region being provided with a collapsible structure, the second region being provided with a rigid structure, the first portion further comprising a seat crossbeam, at least a portion of the seat crossbeam being disposed in the second region to form a rigid structure; the battery cell being received within the receiving cavity and connected to the second region of the first portion.

[0006] In the technical solution of this application embodiment, the first zone has a stronger crumple zone energy absorption capacity than the second zone, and the first zone is arranged on both sides of the second zone. This arrangement allows the first zone on both sides to preferentially crumple and undergo plastic deformation when the housing is subjected to a side impact, thereby effectively absorbing impact energy. The second zone has higher rigidity and strength than the first zone, and its deformation during a side impact is smaller, providing reliable protection for the battery cells arranged within the second zone. Furthermore, the seat beam has high strength, which can improve the rigidity and strength of the second zone, further enhancing the housing's protective performance against the battery cells. Therefore, the housing can efficiently absorb side impact energy while ensuring that the area corresponding to the battery cells has high structural rigidity and strength, thus improving the overall protective effect against the battery cells.

[0007] In some embodiments, the first part is an upper housing, which further includes a body for closing with the second part to define an accommodating cavity, and a seat crossbeam connected to the surface of the body opposite to the second part. Thus, the seat crossbeam is not located on the side of the housing, away from the side impact path, improving the protection performance for the battery cells.

[0008] In some embodiments, the seat crossbeam includes a first segment and a second segment arranged along its own extending direction. The first segment is located on opposite sides of the second segment, and the strength of the first segment is lower than that of the second segment. The first segment is located in a first region to form a collapsible structure, and the second segment is located in a second region. By segmenting and adjusting the strength of the seat crossbeam, the strength of the first segment is made to be less than that of the second segment, thereby making the first segment form a collapsible structure and the second segment form a rigid structure. In this way, using the existing seat crossbeam, both a collapsible structure and a rigid structure can be formed without the need to set an additional collapsible structure in the housing, further saving internal space of the housing and further improving the integration of the battery device.

[0009] In some embodiments, the housing further includes side beams located within the accommodating cavity, the side beams being connected to the main body, and the side beams being disposed in the first region to form a crumple zone. Thus, the side beams are located on both sides of the battery cell, enabling them not only to crumple and absorb energy when the main body is impacted, but also to prevent the battery cell from being crushed, further enhancing the housing's protection of the battery cell.

[0010] In some embodiments, the seat crossbeam extends along a first direction, and the side beams extend along a second direction perpendicular to the first direction. The seat crossbeam is also connected to the body of the first region, and the area where the seat crossbeam connects to the body of the first region is defined as the first connection area, and the area where the side beams connect to the body of the first region is defined as the second connection area. The first connection area and the second connection area are correspondingly provided. The side beams and the seat crossbeam are rigidly connected through the body. The force of a side collision is transmitted linearly to the seat crossbeam through the side beams. Since the side beams can absorb the energy of a side collision, the force transmitted to the seat crossbeam has been weakened. As a rigid structure, the seat crossbeam can withstand the remaining load, reducing the deformation of the body of the second region, thereby reducing the risk of the battery cells being squeezed due to the deformation of the housing.

[0011] In some embodiments, the strength of the side beams is less than the strength of the seat crossbeams connected to the first zone. This allows for progressive collapse of side impact energy, resulting in better energy absorption during side impacts.

[0012] In some embodiments, the body includes: a plate and a flange, the plate being disposed in a second region and a portion of the first region, with the battery cell and seat crossbeam connected to the plate; the flange being disposed in the first region, connected to the side of the plate along a first direction, and folded relative to the plate; wherein, a side beam connects the plate and the flange. The side beam simultaneously connects the plate and the flange, which can improve the stability of the first part of the housing structure, constrain the lateral deformation of the first part during a side collision, reduce the probability of side beam collapse instability and torsion, and achieve orderly and stable collapse deformation of the first part, thereby improving energy absorption efficiency and expansion safety.

[0013] In some embodiments, the side beams and the main body together form a cavity. The cavity can also serve as a collapse structure in the first region. The cavity can reduce the probability of lateral instability and bending when the side of the first part is compressed, and enable the collapse structure to collapse and deform in an orderly manner along a preset path, thereby improving energy absorption efficiency and achieving controllable and efficient collapse energy absorption, which is beneficial to further improving the protective performance of the housing for the battery cells.

[0014] In some embodiments, the cavity extends along a second direction, which is perpendicular to the first direction. This enhances the energy absorption efficiency of the first region of the first portion along the second direction, thereby improving the protection performance of the housing for the individual battery cells.

[0015] In some embodiments, the body includes: a plate, a flange, and a sealing structure. The plate is disposed in a second region and a portion of the first region, and the battery cell and seat crossbeam are connected to the plate. The flange is disposed in the first region and connected to the outer periphery of the plate. The flange is folded towards the side of the plate where the second portion is located. The battery device further includes: a sealing structure for sealing between the battery device and an external mounting structure. The sealing structure is located on the surface of the plate opposite to the second portion and is disposed in the peripheral region of the plate. The peripheral region of the plate includes at least the plate disposed in the first region. By folding the flange of the first portion towards the second portion, the plate is positioned above the flange, thereby creating sufficient arrangement space in the peripheral region of the plate. This arrangement facilitates the placement of the sealing structure in the peripheral region of the plate, allowing the sealing structure to fully fit with the external mounting structure, thereby achieving a reliable seal and improving overall sealing performance.

[0016] In some embodiments, the body is a stamped structure. Using a stamped structure for the body reduces the overall mass of the casing and increases the energy density of the battery. Furthermore, by providing a first and a second region, the stamped casing achieves both light weight and high resistance to side impacts.

[0017] In some embodiments, the number of battery cells is multiple, and the multiple battery cells are arranged into at least one battery cell group. Each battery cell group includes multiple battery cells arranged along a second direction, which is perpendicular to the first direction. The housing also includes: limiting beams, disposed in the second region to form a rigid structure, the limiting beams being located on both sides of the at least one battery cell group along the second direction. The limiting beams also have high rigidity and can serve as the rigid structure of the second region, providing better protection for the battery cells.

[0018] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0019] 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

[0020] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0021] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0022] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0023] Figure 3 This is a top view of the first part of some embodiments of this application;

[0024] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0025] Figure 5 for Figure 4 A magnified view of a portion of the image;

[0026] Figure 6 This is one of the three-dimensional structural schematic diagrams of the first part of some embodiments of this application;

[0027] Figure 7 This is a second three-dimensional structural schematic diagram of the first part of some embodiments of this application;

[0028] Figure 8 This is a schematic diagram showing the location of the sealing structure in the first part of some embodiments of this application.

[0029] Explanation of reference numerals in the attached figures:

[0030] Vehicle 1000, first section 1111, second section 1112, plate 1121, flange 1122, cover 1123, first connecting part 1131, second connecting part 1132, first bending part 1133, second bending part 1134;

[0031] Battery device 100, seat crossbeam 111, body 112, side beam 113, cavity 113a, limiting beam 114, sealing structure 115, controller 200, motor 300.

[0032] Box 10, first part 11, second part 12, battery cell 20;

[0033] Zone 1, Zone 2;

[0034] First direction X, second direction Y. Detailed Implementation

[0035] 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.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0040] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0041] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0042] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0044] The battery pack housing is used to contain individual battery cells. When the housing is subjected to a lateral impact, the impact load can easily cause the sidewalls of the housing to bend and dent inwards, accompanied by significant plastic deformation. Furthermore, because the housing cannot effectively dissipate the impact energy, the deformation continues to extend inwards, causing the housing structure to encroach on the space where the battery cells are arranged, compressing the cells, and potentially damaging the individual cells, or even inducing thermal runaway, thus affecting the safety of the battery pack.

[0045] Based on the above considerations, a battery device is designed, comprising: a housing and a battery cell. The housing includes a first part and a second part, which are fitted together to define a receiving cavity. The first part includes a first region and a second region arranged along a first direction. The first region is connected to opposite sides of the second region. The first region has a collapsible structure, and the second region has a rigid structure. The first part also includes a seat crossbeam, at least a portion of which is located in the second region to form a rigid structure. The battery cell is housed within the receiving cavity and connected to the second region of the first part.

[0046] The first zone has a stronger crumple zone energy absorption capacity than the second zone, and it is located on both sides of the second zone. This arrangement allows the first zone on both sides to crumple and deform preferentially during a side impact, effectively absorbing collision energy. The second zone has higher rigidity and strength than the first zone, resulting in less deformation during a side impact and providing reliable protection for the battery cells located within it. Furthermore, the seat beam has high strength, which enhances the rigidity and strength of the second zone, further improving the protective performance of the enclosure for the battery cells. Therefore, the enclosure can efficiently absorb side impact energy while ensuring high structural rigidity and strength in the areas corresponding to the battery cells, thus improving the overall protection for the battery cells.

[0047] The battery cells disclosed in this application can be used, but are not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power system comprising the battery cells and batteries disclosed in this application can be used to construct such an electrical device or energy storage device.

[0048] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0049] This application also provides an energy storage device that uses a battery as a power source. The energy storage device can be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0050] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0051] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0052] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0053] This application provides a battery device, which includes a housing and a battery cell. The housing includes a first part and a second part, which are closed to each other to define a receiving cavity. The first part includes a first region and a second region arranged along a first direction. The first region is connected to opposite sides of the second region. The first region has a collapsible structure, and the second region has a rigid structure. The first part also includes a seat beam, at least a portion of which is located in the second region to form a rigid structure. The battery cell is accommodated in the receiving cavity and connected to the second region of the first part.

[0054] Please refer to Figure 2 , Figure 2This is an exploded structural diagram of a battery provided in some embodiments of this application. The housing 10 can adopt various structures. In some embodiments, the second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-like structure, with the first part 11 covering the open side of the second part 12 so that the first part 11 and the second part 12 together define an accommodating cavity. In other embodiments, the first part 11 and the second part 12 can also both be hollow structures with one side open, with the open side of the first part 11 covering the open side of the second part 12. Of course, the housing 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0055] In some embodiments, the first part may be an upper housing and the second part may be a lower housing. In other embodiments, the first part may also be a lower housing and the second part may be an upper housing.

[0056] In the battery device 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 20 are connected in both series and parallel connections. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also consist of multiple battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then these battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within the housing 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0057] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0058] refer to Figure 3 as well as Figure 4 The first part 11 can be divided into two first regions 1 and one second region 2 along the first direction X, with the two first regions 1 located on opposite sides of the second region 2. In other words, the first region 1 is the side area of ​​the first part 11 along the first direction X, for example, the first region 1 may include the side wall of the first part 11 along the first direction X, and the second region 2 is the central area of ​​the first part 11. The first direction X can be perpendicular to the height direction of the box, that is, perpendicular to the arrangement direction of the first part 11 and the second part 12.

[0059] Both first zones 1 are provided with a collapsible structure. For example, a portion of the first zone 1 may be provided with a collapsible structure, or the entire first zone 1 may be provided with a collapsible structure. A portion of the second zone 2 may be provided with a rigid structure, or the entire second zone 2 may be provided with a rigid structure.

[0060] A collapsible structure is a structure capable of undergoing controllable deformation, collapse, bending, or fracture in a preset manner when subjected to an external force exceeding a set threshold, thereby absorbing impact energy and reducing the transmission of impact force. In some embodiments, the collapsible structure may include, but is not limited to, at least one of the following: collapsible ribs, crush-inducing grooves, honeycomb structures, crush grooves, weakening grooves, holes, anti-collision beams, elastic buffers, compressible foam, and collapsible supports. It is understood that the embodiments of this application do not specifically limit the structural form of the collapsible structure, as long as the collapsible structure is located in the first region, such that when the first region is subjected to the impact force of a side impact, the collapsible structure located in the first region can undergo collapsible deformation, thus enabling the first region located in the first part of the side area of ​​the housing to effectively absorb the side impact energy.

[0061] The strength of a collapsible structure can be less than that of a rigid structure, making it easier for the collapsible structure to undergo plastic collapse deformation to absorb energy. Rigid structures, due to their higher strength, have stronger resistance to compression and deformation, and thus have higher rigidity, providing reliable protection for battery cells.

[0062] Because the seat beam 111 has high strength, it can strengthen and support the body 112 of the second zone 2, reduce the deformation of the body 112 of the second zone 2, and thus protect the battery cells of the second zone 2.

[0063] In some embodiments, the seat crossbeam 111 may extend along a first direction X. There may be multiple seat crossbeams 111, which may be arranged at intervals along a second direction Y, intersecting the first direction X. For example, there may be two seat crossbeams 111.

[0064] In some embodiments, the seat beam 111 may be provided only in the second zone 2. For example, in the first direction X, the length of the seat beam 111 may be equal to or less than the length of the second zone 2.

[0065] In other embodiments, the seat beam 111 may also extend to a portion of the first zone 1. For example, in the first direction X, the length of the seat beam 111 may be greater than the length of the second zone 2, but less than the sum of the lengths of the first zone 1 and the second zone 2.

[0066] In some embodiments, the battery cell may be bonded to the second region 2 of the first portion 11. For example, if the first portion 11 is an upper housing, the battery cell may be bonded to the inner wall corresponding to the second region 2 of the upper housing.

[0067] In the above technical solution, the first zone 1 has a stronger crumple zone energy absorption capacity than the second zone 2, and the first zone 1 is arranged on both sides of the second zone 2. This arrangement allows the first zone 1 on both sides to crumple and undergo plastic deformation preferentially during a side impact, effectively absorbing the impact energy. The second zone 2 has higher rigidity and strength than the first zone 1, and its deformation during a side impact is smaller, providing reliable protection for the battery cells located within the second zone 2. Furthermore, the seat beam has high strength, which improves the rigidity and strength of the second zone, further enhancing the protective performance of the battery cells. Since the seat beam is already a structure within the electrical device, integrating it into the first part saves internal space and increases the integration of the battery device. Therefore, the battery cell can efficiently absorb side impact energy while ensuring high structural rigidity and strength in the corresponding areas, thus improving the overall protection effect for the battery cells.

[0068] refer to Figures 3 to 7 According to some embodiments of this application, the first part 11 is an upper housing, and the first part 11 further includes: a body 112, which is used to cover the second part 12 to define an accommodating cavity; and a seat beam 111 connected to the surface of the body 112 opposite to the second part 12.

[0069] Figure 6 This shows the side of the first part 11 that is opposite to the second part 12. Figure 7 The first part is shown facing the second part 12.

[0070] The seat crossbeam 111 can be used to connect the seat. The seat crossbeam 111 is connected to the body 112, so that the seat crossbeam 111 serves as an intermediate connecting part between the seat and the body 112, and also makes the seat crossbeam 111 and the body 112 form an integral structure.

[0071] The seat crossbeam is connected to the surface of the main body 112 that is opposite to the second part, that is, the seat crossbeam is connected to the top surface of the main body.

[0072] In some embodiments, the seat beam 111 can be welded to the body 112, for example, by spot welding.

[0073] In some embodiments, the strength of the seat beam 111 is greater than the strength of the body 112, so that the seat beam 111 can enhance the rigidity and strength of the body 112 of the second zone 2.

[0074] For example, the material of the body 112 may include, but is not limited to, aluminum alloy, steel, etc. The material of the seat crossbeam 111 may include, but is not limited to, high-strength steel, ultra-high-strength steel, hot-formed steel, or high-strength aluminum alloy, etc.

[0075] In the above technical solution, the seat crossbeam is not located on the side of the box, away from the side collision path, which improves the protection performance of the battery cells.

[0076] refer to Figure 4 as well as Figure 5 According to some embodiments of this application, the seat crossbeam 111 includes a first segment 1111 and a second segment 1112 arranged along its own extension direction. The first segment 1111 is located on opposite sides of the second segment 1112. The strength of the first segment 1111 is lower than that of the second segment 1112. The first segment 1111 is disposed in the first region 1 to form a collapsible structure, and the second segment 1112 is disposed in the second region 2.

[0077] In some embodiments, the seat crossbeam 111 may extend along a first direction X, and a first segment 1111 and a second segment 1112 are arranged along the first direction X. There are two first segments 1111, and the two first segments 1111 are respectively connected to opposite sides of the second segment 1112.

[0078] In some embodiments, the first segment 1111 may be located in a portion of the first region 1. Exemplarily, along the first direction X, the length of the first segment 1111 may be less than the total length of the first region 1, and the length of the second segment 1112 may be equal to the total length of the second region 2.

[0079] In some embodiments, the seat crossbeam 111 is manufactured using a thermoforming process, which can locally soften the first segment 1111 so that the strength of the first segment 1111 is less than the strength of the second segment 1112.

[0080] In the above technical solution, by segmenting and adjusting the strength of the seat crossbeam 111, the strength of the first segment 1111 is less than that of the second segment 1112, thereby making the first segment 1111 form a collapsible structure and the second segment 1112 form a rigid structure. In this way, the existing seat crossbeam 111 can form both a collapsible structure and a rigid structure, eliminating the need to set up an additional collapsible structure in the housing, further saving internal space of the housing, and further improving the integration of the battery device.

[0081] refer to Figure 4 , Figure 5 as well as Figure 7 According to some embodiments of this application, the housing further includes: a side beam 113 located within the accommodating cavity, the side beam 113 being connected to the body 112, and the side beam 113 being disposed in the first region 1 to form a collapsible structure.

[0082] In other words, the side beam 113 is located on the side of the body 112 near the accommodating cavity. When the box is subjected to a side impact, the side of the body 112 is impacted first. The body 112 transfers the energy of the side impact to the side beam 113, and the side beam 113 collapses to absorb energy, thereby weakening the side impact energy transmitted to the second zone 2.

[0083] In some embodiments, the body 112 includes a plate 1121 and a flange 1122 connected to the side of the plate 1121 along a first direction X. The flange 1122 serves as a sidewall of the body 112. A battery cell is connected to the plate 1121. The plate 1121 is located in the second region 2 and a portion of the first region 1, and the flange 1122 is located in the first region 1. In some embodiments, the side beam may be connected only to the flange. In other embodiments, the side beam may be connected only to the plate located in the first region 1. In still other embodiments, the side beam 113 may be connected to both the plate 1121 and the flange 1122 in the first region 1.

[0084] In some embodiments, the side beam 113 and the body 112 can be connected by welding, bonding or other methods.

[0085] In some embodiments, the side beam 113 may also extend along a second direction Y, which is perpendicular to the first direction X.

[0086] In some embodiments, the maximum strength of the side beam 113 is less than the minimum strength of the seat crossbeam 111, thus enabling the side beam 113 to form a collapsible structure, while the seat crossbeam 111 can form a rigid structure. The strength referred to here can be tensile strength.

[0087] In some embodiments, the material of the side beam 113 includes, but is not limited to, steel, aluminum alloy, etc.

[0088] In the above technical solution, the side beam 113 is located in the accommodating cavity and in the first zone 1. Since the battery cell is located in the second zone 2, the side beam 113 is located on both sides of the battery cell. In this way, the side beam 113 can not only collapse and absorb energy when the body 112 is impacted, but also prevent the battery cell from being squeezed, thus further enhancing the protection of the battery cell by the housing.

[0089] refer to Figure 4 as well as Figure 5According to some embodiments of this application, the seat crossbeam 111 extends along a first direction X, and the side beam 113 extends along a second direction Y, the second direction Y being perpendicular to the first direction X. The seat crossbeam 111 is also connected to the body 112 of the first region 1, and the area where the seat crossbeam 111 is connected to the body 112 of the first region 1 is defined as the first connection area, and the area where the side beam 113 is connected to the body 112 of the first region 1 is defined as the second connection area. The first connection area and the second connection area are correspondingly provided.

[0090] In other words, the first connecting area and the second connecting area are located on opposite sides of the body 112 in a third direction. The third direction, the second direction Y, and the first direction X are perpendicular to each other. The third direction can be the height direction of the box or the thickness direction of the body. There are two first areas 1. Each first area 1 has a flange 1122 and a portion of a plate 1121. In other words, the two side areas of the plate 1121 along the first direction X are located in the two first areas 1 respectively. The two end areas of the seat beam 111 along the first direction X are connected to the plates 1121 of the two first areas 1 respectively. Therefore, there are two first connecting areas. There are two side beams 113. The two side beams 113 are connected to the two first areas 1 respectively. Therefore, there are two second connecting areas. The two first connecting areas and the two second connecting areas are arranged in a one-to-one correspondence.

[0091] In some embodiments, when the body 112 includes a plate 1121 and a flange 1122, both the first connection area and the second connection area are located in the plate 1121 of the first region 1.

[0092] In some embodiments, the seat crossbeam 111 and the body 112 can be connected by welding, and the side beam 113 and the body 112 can also be connected by welding. The welding connection can be a spot welding connection.

[0093] In the above technical solution, the side beam 113 and the seat crossbeam 111 are rigidly connected through the body 112. The force of the side collision will be transmitted to the seat crossbeam 111 in a straight line through the side beam 113. Since the side beam 113 can absorb the energy of the side collision, the force transmitted to the seat crossbeam 111 has been weakened. As a rigid structure, the seat crossbeam 111 can bear the remaining load, reduce the deformation of the body 112 of the second zone 2, and thus reduce the risk of the battery cell being squeezed due to the deformation of the box.

[0094] According to some embodiments of this application, the strength of the side beam 113 is less than the strength of the seat crossbeam 111 connected to the first zone 1.

[0095] In some embodiments, the seat crossbeam 111 of the first region 1 is a first segment 1111, and the seat crossbeam 111 of the second region 2 is a second segment 1112. The strength of the first segment 1111 is less than that of the second segment 1112. Therefore, along the direction from the first region 1 to the second region 2, the strength of the side beam 113, the first segment 1111, and the second segment 1112 increases sequentially. The energy from the side impact of the first part 11 passes through the side beam 113 and the first segment 1111 sequentially, which can achieve gradual energy collapse and improve the energy absorption effect. The strength of the second segment 1112 is greater than that of the side beam 113 and the first segment, which can, to a certain extent, prevent the second region 2 from deforming and reduce the risk of squeezing the battery cells in the second region 2.

[0096] In the above technical solution, the strength of the side beam 113 is less than the strength of the seat crossbeam 111 connected to the first zone 1, which can realize the gradual collapse of side impact energy, and thus have a better energy absorption effect on side impact energy.

[0097] refer to Figure 4 as well as Figure 5 According to some embodiments of this application, the body 112 includes: a plate 1121 and a flange 1122. The plate 1121 is disposed in the second region 2 and part of the first region 1. The battery cell and the seat crossbeam 111 are connected to the plate 1121. The flange 1122 is disposed in the first region 1 and is connected to the side of the plate 1121 along the first direction X. The flange 1122 is folded relative to the plate 1121. The side beam 113 is connected to the plate 1121 and the flange 1122.

[0098] The flange 1122 can serve as the side wall of the body 112. The two side regions of the plate 1121 along the first direction X are respectively located in the two first regions 1. The flange 1122 is located in the two first regions 1, and the flange 1122 is connected to the two side regions of the plate 1121 that are opposite to each other along the first direction X.

[0099] In some embodiments, the side beam 113 may include a first connecting portion 1131 and a second connecting portion 1132. The first connecting portion 1131 connects to a flange 1122, and the second connecting portion 1132 connects to a plate 1121. The first connecting portion 1131 and the plate 1121 are connected to form a first connecting area. The first connecting portion 1131 and the first segment 1111 of the crossbeam may be located on opposite sides of the plate 1121 along its thickness direction. The thickness direction of the plate 1121 is also known as the third direction.

[0100] In some embodiments, the first connecting portion 1131 may be arranged parallel to the plate 1121 of the first region 1, and the second connecting portion 1132 may be arranged parallel to the flange 1122 of the first region 1.

[0101] In some embodiments, the first connecting portion 1131 and the second connecting portion 1132 may extend along the second direction Y.

[0102] In some embodiments, the first connecting portion 1131 may be bonded to the flange 1122, and the second connecting portion 1132 may be welded to the plate body 1121.

[0103] In some embodiments, the body 112 may further include a cover portion 1123, which is connected to the side of the flange 1122 facing away from the plate body 1121. The cover portion 1123 is bent relative to the flange 1122, and exemplaryly, the cover portion 1123 may be parallel to the plate body 1121. The cover portion 1123 is used for a cover connection with the second part. In some embodiments, the cover portion 1123 is further provided with a mounting structure for mounting connection with an external mounting structure.

[0104] In some embodiments, the plate 1121 may also be provided with flanges 1122 and cover portions 1123 on both sides along the first direction X, so that the first portion 11 is covered by the second portion on all four sides.

[0105] In the above technical solution, the side beam 113 connects the plate 1121 and the flange 1122, which can improve the stability of the first part 11 of the box structure, constrain the lateral deformation of the first part 11 during the side collision, reduce the probability of the side beam 113 collapsing, becoming unstable and twisted, and achieve orderly and stable collapse deformation of the first part 11, thereby improving energy absorption efficiency and expansion safety.

[0106] refer to Figure 4 as well as Figure 5 According to some embodiments of this application, the side beam 113 and the body 112 together form a cavity 113a.

[0107] In some embodiments, the side beam 113 further includes a first bend 1133 and a second bend 1134 connected between the first connecting portion 1131 and the second connecting portion 1132. The first bend 1133 is connected to the first connecting portion 1131, one end of the second bend 1134 is connected to the first connecting portion 1131, and the other end is connected to the second connecting portion 1132. The first bend 1133 is bent relative to the first connecting portion 1131, and the second bend 1134 is bent relative to both the first bend 1133 and the second connecting portion 1132. The first bending portion 1133 is disposed opposite to the plate body 1121 of the first region 1 and has a gap between it and the plate body 1121 of the first region 1. The second bending portion 1134 is disposed opposite to the flange 1122 and has a gap between it and the flange 1122. The first bending portion 1133, the second bending portion 1134, the body 112 opposite to the first bending portion 1133, and the flange 1122 opposite to the second bending portion 1134 together form a cavity 113a.

[0108] In some embodiments, the side beam 113 may be formed by sheet metal stamping or bending.

[0109] In the above technical solution, the cavity 113a can also serve as the collapse structure of the first region 1. The cavity 113a can reduce the probability of lateral instability and bending when the side of the first part 11 is compressed, and enable the collapse structure to collapse and deform in an orderly manner along a preset path, thereby improving energy absorption efficiency and achieving controllable and efficient collapse energy absorption, which is conducive to further improving the protection performance of the housing for the battery cells.

[0110] According to some embodiments of this application, the cavity 113a extends along a second direction Y, which is perpendicular to the first direction X.

[0111] The side beam 113 extends along the second direction Y, wherein the first connecting part 1131, the second connecting part 1132, the first bending part 1133 and the second bending part 1134 all extend along the second direction Y, so that the cavity 113a extends along the second direction Y.

[0112] In some embodiments, the number of battery cells is multiple, and the multiple battery cells are arranged into at least one battery cell group. Each battery cell group includes multiple battery cells arranged along the second direction Y. Side beams 113 are located on both sides of the battery cell group along the first direction X. Exemplarily, the two ends of the side beams 113 along the second direction Y may extend beyond the two ends of the battery cell group along the second direction Y, that is, the length of the side beams 113 along the second direction Y may be greater than the length of the battery cell group. Exemplarily, the two ends of the side beams 113 along the second direction Y may also be aligned with the two ends of the battery cell group along the second direction Y, that is, the length of the side beams 113 along the second direction Y may be equal to the length of the battery cell group. Exemplarily, the two ends of the battery cell group along the second direction Y may also extend beyond the two ends of the side beams 113 along the second direction Y, that is, the length of the side beams 113 along the second direction Y may be less than the length of the battery cell group.

[0113] In some embodiments, the cavities 113a are open at both ends along the second direction Y.

[0114] In the above technical solution, the cavity 113a extends along the second direction Y, which can enhance the energy absorption efficiency of the first region 1 of the first part 11 in the second direction Y and improve the protection performance of the housing for the battery cells.

[0115] refer to Figure 8According to some embodiments of this application, the body 112 includes: a plate 1121, a flange 1122, and a sealing structure 115. The plate 1121 is disposed in the second region 2 and a portion of the first region 1. The battery cell and the seat beam 111 are connected to the plate 1121. The flange 1122 is disposed in the first region 1 and is connected to the outer periphery of the plate 1121. The flange 1122 is folded towards the side where the second portion is located relative to the plate 1121. The sealing structure 115 is used to achieve a seal between the battery device and the external mounting structure. The sealing structure 115 is located on the side surface of the plate 1121 opposite to the second portion and is disposed in the peripheral area of ​​the plate 1121. The peripheral area of ​​the plate 1121 includes at least the plate 1121 disposed in the first region 1.

[0116] The plate 1121 can be divided into a central region and a peripheral region surrounding the central region. In other words, the peripheral region is the region near the outer edge of the plate 1121. It is understood that the plate 1121 located in the first region 1 is the side region of the plate 1121. Therefore, the plate 1121 in the first region 1 at least partially overlaps with the peripheral region.

[0117] Because the flange 1122 is folded towards the side where the second part is located, the height of the side surface of the plate 1121 facing away from the second part is higher than the height of the flange 1122. This ensures that the side surface of the plate 1121 facing away from the second part is not affected by the flange 1122 when it is installed with the external mounting structure. Based on this, placing the sealing structure 115 on the side surface of the plate 1121 facing away from the second part helps the sealing structure 115 to fit tightly with the external mounting structure, thereby improving the sealing performance.

[0118] The area around the outer edge of the plate 1121 is the outer perimeter area. Therefore, the sealing structure 115 can be annular and arranged in the entire outer perimeter area.

[0119] In some embodiments, the sealing structure 115 arranged along the first direction X may be located on the side of the first segment 1111 of the seat beam 111 opposite to the second segment 1112.

[0120] In some embodiments, a recessed structure is provided in the peripheral region of the plate 1121, and the recessed structure is provided on the side surface of the plate 1121 opposite to the second part. Exemplarily, the recessed structure may include, but is not limited to, a recessed groove, a recessed step, etc. A sealing structure 115 is provided at the recessed structure, thereby improving the connection strength between the sealing structure 115 and the plate 1121.

[0121] In some embodiments, the sealing structure 115 may include, but is not limited to, foamed rubber, sealant, sealing strip, or foam tape.

[0122] In some embodiments, the external mounting structure may include, but is not limited to, the structure in the vehicle that is mounted and connected to the housing.

[0123] In the above technical solution, by folding the flange 1122 of the first part 11 toward the second part, the plate 1121 is positioned above the flange 1122, thereby creating sufficient arrangement space in the outer area of ​​the plate 1121. This arrangement facilitates the placement of the sealing structure 115 in the outer area of ​​the plate 1121, allowing the sealing structure 115 to fully fit with the external mounting structure, thereby achieving reliable sealing and improving overall sealing performance.

[0124] According to some embodiments of this application, the body 112 is a stamped structure.

[0125] In other words, the body 112 is an integral structure formed from sheet metal through stamping, bending, stretching, and pressing processes. When the body 112 includes a sheet 1121, a flange 1122, and a cover portion 1123, the sheet 1121, flange 1122, and cover portion 1123 can be integrally formed through stamping.

[0126] In some embodiments, the second part of the housing may also be integrally formed by a stamping process.

[0127] In the above technical solution, the body 112 is set as a stamped structure, which can reduce the total mass of the box and improve the energy density of the battery. By setting the first zone 1 and the second zone 2, the stamped box is lightweight while having high resistance to side impacts.

[0128] refer to Figure 4 , Figure 5 as well as Figure 7 According to some embodiments of this application, the number of battery cells is multiple, and the multiple battery cells are arranged into at least one battery cell group. Each battery cell group includes multiple battery cells arranged along a second direction Y, which is perpendicular to the first direction X. The housing also includes a limiting beam 114, which is disposed in the second zone 2 to form a rigid structure. The limiting beam 114 is located on both sides of at least one battery cell group along the second direction Y.

[0129] In some embodiments, multiple battery cells can be arranged into multiple battery cell groups, and the multiple battery cell groups can be arranged along a first direction X.

[0130] There are two limiting beams 114, which are arranged opposite each other along the second direction Y, and all battery cell groups are located between the two limiting beams 114. The limiting beams 114 are used to provide expansion space for the charging and discharging expansion of the battery cell groups, and to apply preload to the battery cells to constrain their displacement.

[0131] In some embodiments, the limiting beam 114 extends along a first direction X, and the extension direction of the limiting beam 114 may be the same as the extension direction of the seat crossbeam 111. Along the first direction X, the length of the limiting beam 114 may be greater than the total width of all battery cell groups, where the first direction X is the width direction of the battery cell group and the second direction Y is the length direction of the battery cell group. Along the first direction X, the length of the limiting beam 114 may be less than the length of the seat crossbeam 111, wherein the limiting beam 114 is located only in the second region 2, and the seat constant current may be located in the second region 2 and a portion of the first region 1.

[0132] In some embodiments, the limiting beam 114 is an expansion beam.

[0133] In the above technical solution, the limiting beam 114 also has great rigidity and can serve as a rigid structure of the second zone 2, providing better protection for the battery cells.

[0134] This application provides an electrical device, which includes the battery device described in the above embodiments, and the battery device is used to provide electrical energy.

[0135] The structure of the battery device and the power supply device can be referred to the relevant description in the above embodiments, and will not be repeated here.

[0136] refer to Figures 3 to 7 According to some embodiments of this application, the electrical device is a vehicle, and in the battery device, the first part 11 of the housing is an upper housing. The first part 11 includes: a body 112, which is used to cover the second part to define an accommodating cavity; and a seat beam 111, which is connected to the surface of the body 112 opposite to the second part. At least a portion of the seat beam 111 is disposed in the second region 2 to form a rigid structure. The seat beam 111 is used for the seat of the vehicle.

[0137] The seat crossbeam 111 can be used to connect the seat. The seat crossbeam 111 is connected to the body 112, so that the seat crossbeam 111 serves as an intermediate connector between the seat and the body 112.

[0138] In some embodiments, the number of seat crossbeams 111 can be two.

[0139] In the above technical solution, the seat crossbeam 111 is integrated into the body 112, so that the seat crossbeam 111 can not only be used to connect the seat, but also to strengthen and support the body 112, thereby enhancing the side impact resistance of the housing and improving the protection performance of the battery cells.

[0140] The technical solution of this application will be further described below with reference to a specific embodiment.

[0141] refer to Figures 3 to 7The battery device includes a housing and battery cells. The housing includes a first part 11 and a second part, which are closed to each other to define a receiving cavity. The first part 11 includes a first region 1 and a second region 2 arranged along a first direction X. The first region 1 is connected to opposite sides of the second region 2. The first region 1 has a collapsible structure, and the second region 2 has a rigid structure. The first part also includes a seat crossbeam, at least a portion of which is located in the second region to form a rigid structure. The battery cells are housed in the receiving cavity and connected to the second region 2 of the first part 11.

[0142] The first part 11 is the upper housing. The first part 11 also includes: a body 112, which is used to cover the second part to define an accommodating cavity; a seat beam 111 is connected to the surface of the body 112 away from the second part. The seat beam 111 includes a first segment 1111 and a second segment 1112 arranged along its own extension direction. The first segment 1111 is located on opposite sides of the second segment 1112. The strength of the first segment 1111 is lower than the strength of the second segment 1112. The first segment 1111 is located in the first region 1 to form a collapsible structure. The second segment 1112 is located in the second region 2.

[0143] The housing also includes a side beam 113 located within the accommodating cavity. The side beam 113 is connected to the main body 112 and is positioned in the first region 1 to form a collapsible structure. The strength of the side beam 113 is less than the strength of the seat crossbeam 111 connected to the first region 1. The seat crossbeam 111 extends along a first direction X, and the side beam 113 extends along a second direction Y, which is perpendicular to the first direction X. The seat crossbeam 111 is also connected to the main body 112 of the first region 1. The area where the seat crossbeam 111 connects to the main body 112 of the first region 1 is defined as the first connection area, and the area where the side beam 113 connects to the main body 112 of the first region 1 is defined as the second connection area. The first and second connection areas are correspondingly provided. The seat crossbeam 111 and the main body 112 can be connected by welding, and the side beam 113 and the main body 112 can also be connected by welding. The welding connection can be a spot weld.

[0144] The main body 112 includes a plate 1121 and a flange 1122. The plate 1121 is located in the second region 2 and a portion of the first region 1. The battery cell and the seat crossbeam 111 are connected to the plate 1121. The flange 1122 is located in the first region 1 and is connected to the side of the plate 1121 along the first direction X. The flange 1122 is folded relative to the plate 1121. A side beam 113 is connected to the plate 1121 and the flange 1122. The side beam 113 also includes a first connecting portion 1131, a second connecting portion 1132, and a first bending portion 1133 and a second bending portion 1134 connected between the first connecting portion 1131 and the second connecting portion 1132. The first connecting part 1131 is connected to the flange 1122, the second connecting part 1132 is connected to the plate 1121, the first bending part 1133 is connected to the first connecting part 1131, one end of the second bending part 1134 is connected to the first connecting part 1131, and the other end is connected to the second connecting part 1132. The first bending part 1133 is bent relative to the first connecting part 1131, and the second bending part 1134 is bent relative to both the first bending part 1133 and the second connecting part 1132. The first bending portion 1133 is disposed opposite to the plate body 1121 of the first region 1 and has a gap between it and the plate body 1121 of the first region 1. The second bending portion 1134 is disposed opposite to the flange 1122 and has a gap between it and the flange 1122. The first bending portion 1133, the second bending portion 1134, the body 112 opposite to the first bending portion 1133, and the flange 1122 opposite to the second bending portion 1134 together form a cavity 113a.

[0145] refer to Figure 8 The body 112 may further include a sealing structure 115, which is located on the side surface of the plate 1121 away from the second part, and the sealing structure 115 is disposed in the peripheral area of ​​the plate 1121, which includes at least the plate 1121 disposed in the first region 1.

[0146] The main body 112 is a stamped structure.

[0147] The number of battery cells is multiple, and the multiple battery cells are arranged into at least one battery cell group. Each battery cell group includes multiple battery cells arranged along a second direction Y, which is perpendicular to the first direction X. The housing also includes a limiting beam 114, which is provided in the second zone 2 to form a rigid structure. The limiting beam 114 is located on both sides of at least one battery cell group along the second direction Y.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The housing includes a first part and a second part, which cover each other to define a receiving cavity. The first part includes a first area and a second area arranged along a first direction. The first area is connected to opposite sides of the second area. The first area has a collapsible structure, and the second area has a rigid structure. The first part also includes a seat beam, at least a portion of which is disposed in the second area to form the rigid structure. A single battery cell is housed within the accommodating cavity and connected to the second region of the first portion.

2. The battery device according to claim 1, characterized in that, The first part is the upper housing, and the first part also includes: The body is used to cover the second portion to define the receiving cavity, and the seat beam is connected to the surface of the body opposite to the second portion.

3. The battery device according to claim 2, characterized in that, The seat crossbeam includes a first segment and a second segment arranged along its own extension direction. The first segment is located on opposite sides of the second segment. The strength of the first segment is lower than that of the second segment. The first segment is located in the first area to form the collapsible structure, and the second segment is located in the second area.

4. The battery device according to claim 2 or 3, characterized in that, The enclosure also includes: A side beam is located within the accommodating cavity and is connected to the body. The side beam is disposed in the first region to form the collapsible structure.

5. The battery device according to claim 4, characterized in that, The seat crossbeam extends along the first direction, and the side beam extends along the second direction, which is perpendicular to the first direction. The seat crossbeam is also connected to the body of the first area. The area where the seat crossbeam is connected to the body of the first area is defined as the first connection area, and the area where the side beam is connected to the body of the first area is defined as the second connection area. The first connection area and the second connection area are correspondingly provided.

6. The battery device according to claim 5, characterized in that, The strength of the side beam is less than the strength of the seat crossbeam connected to the first area.

7. The battery device according to claim 4, characterized in that, The body includes: A plate body is disposed in the second area and part of the first area, and the battery cell and the seat beam are connected to the plate body; A flange, located in the first area, is connected to the side of the plate along the first direction, and is folded over relative to the plate; wherein, The side beam is connected to the plate and the flange.

8. The battery device according to claim 7, characterized in that, The side beam and the main body together form a cavity.

9. The battery device according to claim 8, characterized in that, The cavity extends along a second direction, which is perpendicular to the first direction.

10. The battery device according to claim 2 or 3, characterized in that, The body includes: A plate body is disposed in the second area and part of the first area, and the battery cell and the seat beam are connected to the plate body; A flange, located in the first area, is connected to the outer periphery of the plate. The flange is folded towards the side where the second part is located relative to the plate. The battery device further includes: A sealing structure is provided to achieve a seal between the battery device and the external mounting structure. The sealing structure is located on the side surface of the plate body away from the second part, and the sealing structure is provided in the peripheral area of ​​the plate body. The peripheral area of ​​the plate body includes at least the plate body provided in the first area.

11. The battery device according to claim 2 or 3, characterized in that, The body is a stamped structure.

12. The battery device according to any one of claims 1-3, characterized in that, The number of battery cells is multiple, and the multiple battery cells are arranged into at least one battery cell group. Each battery cell group includes multiple battery cells arranged along a second direction, which is perpendicular to the first direction. The housing also includes: A limiting beam is provided in the second region to form the rigid structure, the limiting beam being located on both sides of the at least one battery cell group along the second direction.

13. An electrical appliance, characterized in that, The electrical device includes the battery device according to any one of claims 1-12, the battery device being used to provide electrical energy.

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