Battery device and electric device

Abstract

The application is suitable for the technical field of batteries, and provides a battery device and a power consumption device. The battery device comprises a box body and a battery monomer arranged in the box body. The box body comprises a frame and a limiting beam. The frame encloses a first accommodating space. The limiting beam is arranged in the first accommodating space, and the limiting beam is connected with the frame at both ends in a first direction. At least a first part of the frame is a profile steel. In a projection plane perpendicular to the first direction or a second direction, a front projection of the first part overlaps a front projection of the battery monomer. And / or, in a projection plane perpendicular to the second direction, the front projection of the first part overlaps the front projection of the battery monomer. The second direction is perpendicular to the first direction. The battery device and the power consumption device provided by the application can reduce the adverse effect of the frame on the energy density of the battery device.

Description

Technical Field

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

[0002] The frame of the housing is mainly made of roll forming or profile structure, which has at least the following problems: the strength of profile or roll forming frame is low, and a larger cross-sectional size is required to ensure bending and torsional stiffness, which indirectly reduces the energy density of the battery device. Summary of the Invention

[0003] In view of the above problems, this application provides a battery device and an electrical device, which aims to reduce the adverse effect of the frame on the energy density of the battery device.

[0004] In a first aspect, embodiments of this application provide a battery device, including a housing and a battery cell disposed within the housing. The housing includes a frame and a limiting beam. The frame encloses a first accommodating space, and the limiting beam is disposed within the first accommodating space. Both ends of the limiting beam are connected to the frame in a first direction. At least a first portion of the frame is made of structural steel. On a projection plane perpendicular to the first direction or a second direction, the orthographic projection of the first portion overlaps with the orthographic projection of the battery cell. And / or, on a projection plane perpendicular to the second direction, the orthographic projection of the first portion overlaps with the orthographic projection of the battery cell. The second direction is perpendicular to the first direction.

[0005] Multiple limiting beams are provided. The multiple limiting beams are spaced apart along the second direction. A single battery cell is located between two adjacent limiting beams, and the two adjacent limiting beams are connected by a first part.

[0006] The box body also includes longitudinal beams, and adjacent limiting beams are connected by longitudinal beams.

[0007] The limiting beam has a first plate extending toward the side where the longitudinal beam is located, and at least a portion of the longitudinal beam is stacked and connected to the first plate.

[0008] Since the first part of the frame may come into contact with or transmit force to the battery cells, the solution provided in this embodiment, which sets at least the first part of the frame as a structural steel, can give this part of the frame high mechanical strength, structural stability, and make it less prone to bending and deformation after being subjected to external impact. Because the first part may come into contact with or transmit force to the battery cells, the first part is less prone to bending and deformation under external force, making it less likely for external force to be transmitted to the battery cells through the first part. This can reduce the risk of damage to the battery cells to a certain extent, and can also ensure bending and torsional stiffness without processing the frame to a large cross-sectional size. This can also reduce the volume of the frame to a certain extent and reduce the adverse impact of the frame on the energy density of the battery device.

[0009] The solution provided in this embodiment allows both ends of the battery module formed by combining multiple battery cells to contact the limiting beams, thus restricting the expansion of the battery module. Simultaneously, the connection between adjacent limiting beams via a first section made of structural steel ensures a stable connection between the frame and the limiting beams, preventing cracking at the connection point. The longitudinal beams prevent the limiting beams from bulging outwards in the second direction under the expansion force of the battery cells. Furthermore, the longitudinal beams eliminate the need for steel strips connecting adjacent limiting beams in the battery assembly. The first plate increases the connection area between the longitudinal beams and the limiting beams, ensuring a stable connection.

[0010] In some possible implementations, there are multiple longitudinal beams, which are spaced apart along a first direction, and a second receiving space is formed between two adjacent longitudinal beams, with the battery cell located in the second receiving space.

[0011] Multiple longitudinal beams are provided, which allows multiple areas of the limiting beam to be connected to the longitudinal beams. This can suppress the multiple areas of the limiting beam from bulging outward along the second direction under the expansion force of the battery cell, thereby helping to suppress the expansion of battery cells at different positions.

[0012] In some possible implementations, the bottom of the longitudinal beam has a second plate extending toward the second receiving space; on a projection plane parallel to the first and second directions, the orthographic projection of the second plate overlaps at least partially with the orthographic projection of the battery cell; an insulating member is provided on the side of the second plate facing the battery cell, and the second plate is electrically isolated from the battery cell by the insulating member.

[0013] Because of the high mechanical strength of the structural steel, the elastic deformation of the longitudinal beams is relatively small when the battery pack is subjected to vibration and impact, resulting in lower stress transmitted to the individual battery cells. Furthermore, the battery cells are typically fixed to the base plate or secondary plate of the housing using adhesives. Adhesive failure is usually related to cyclic stress (fatigue caused by repeated deformation) or instantaneous overload. The smaller deformation of the structural steel directly reduces these two risks, thus minimizing the risk of battery cells detaching from the adhesive.

[0014] In some possible implementations, the top of the longitudinal beam has a third plate disposed opposite to the second plate, and a third receiving space is formed between the third plate and the second plate. The third receiving space is provided with a first buffer structure and / or a temperature regulating structure.

[0015] When the third containment space is equipped with a first buffer structure, the first buffer structure can convert the impact kinetic energy into heat energy or other forms of energy through elastic deformation (such as rubber), plastic deformation (such as metal foam), or damping effect (such as viscoelastic materials), thereby reducing the impact kinetic energy received by the battery cell and thus reducing the risk of damage to the battery cell. When the third containment space is equipped with a temperature regulating structure, the temperature regulating structure can adjust the temperature of the battery cell, ensuring that the temperature of the battery cell is always within a preset range, which is conducive to maintaining a stable working state of the battery cell.

[0016] In some possible implementations, the longitudinal beam has a cavity, and the cavity contains a temperature regulating structure.

[0017] The longitudinal beams have cavities, and the temperature-regulating structure is located within these cavities, allowing for a compact battery device structure. Simultaneously, the temperature-regulating structure can adjust the temperature of each individual battery cell, ensuring it remains within a preset range and thus contributing to stable operation.

[0018] In some possible implementations, the housing also includes a support plate connected to the frame. The support plate has a first region and a second region connected to each other. The first region is used to support the battery cells, and the second region is used to support at least the limiting beam and the longitudinal beam. The second region has a protruding structure protruding toward the side where the limiting beam is located. The support plate is connected to the limiting beam and / or the longitudinal beam through the protruding structure.

[0019] The support plate is connected to the limiting beam and / or longitudinal beam through a protruding structure. The protruding structure is located in a second area of ​​the support plate that does not directly transmit force to the battery cells. In this way, when the support plate is subjected to external impact, the impact force can be transmitted to other areas of the housing through the limiting beam and / or longitudinal beam, reducing the impact force transmitted from the support plate to the battery cells, thereby reducing the risk of damage to the battery cells.

[0020] In some possible implementations, a second buffer structure is provided on the side of the first region facing the battery cell.

[0021] The second buffer structure can reduce the impact force transmitted from the support plate to the battery cell, thereby reducing the risk of damage to the battery cell.

[0022] In some possible implementations, the housing also includes a thermal management component, which is located on the side of the limiting beam away from the support plate, or on the support plate; the thermal management component is in thermally conductive contact with the battery cell.

[0023] The thermal management components facilitate the cooling of individual battery cells, making them less prone to thermal runaway. When the thermal management components are located on the side of the limiting beam away from the support plate, they can be connected to the cover of the housing, allowing the cover and the thermal management components to be combined into a single unit for easy overall installation.

[0024] In some possible implementations, the thermal management components make thermal contact with the battery cells through a thermally conductive structure.

[0025] Since thermally conductive structures generally have high thermal conductivity, their design allows for rapid heat exchange between battery cells and thermal management components. Compared to heat exchange between battery cells and thermal management components via air convection, this reduces the thermal resistance between them and facilitates rapid cooling of the battery cells.

[0026] In some possible implementations, the longitudinal beams are made of structural steel.

[0027] The longitudinal beams are made of shaped steel, which has a simple structure, is easy to manufacture, has good precision, and high mechanical strength.

[0028] In some possible implementations, the limiting beam and the frame are connected by a first connector, and the longitudinal beam and the limiting beam are connected by a second connector; both the first connector and the second connector include corner plates.

[0029] The limiting beam and the frame are connected by corner plates, and the longitudinal beam and the limiting beam are connected by corner plates. This can simplify the complex welding or riveting process between the limiting beam and the frame, and between the longitudinal beam and the limiting beam, to a certain extent, reducing the assembly difficulty. At the same time, it can improve the bending and torsional stiffness and side impact stiffness of the battery device to a certain extent.

[0030] In addition, the corner plate can also be used to factor the manufacturing dimensional tolerances between the frame and the limiting beam, and between the limiting beam and the longitudinal beam, simplify the connection structure, and reduce the connection stress that may exist between the frame and the limiting beam, and between the limiting beam and the longitudinal beam.

[0031] In some possible implementations, the frame has a fourth plate extending toward the side where the limiting beam is located, and at least a portion of the limiting beam is stacked and connected to the fourth plate.

[0032] At least a portion of the limiting beam is stacked and connected to the fourth plate, which can increase the connection area between the steel in the frame and the limiting beam, making the connection between the frame and the limiting beam stable, and facilitating the transmission and dispersion of force, resulting in a good stress structure.

[0033] In some possible implementations, the limiting beam is made of steel.

[0034] In this embodiment, the limiting beams are made of structural steel, which gives them high mechanical strength and makes them less prone to deformation. This eliminates the need for longitudinal beams and steel strips between adjacent limiting beams, resulting in fewer components required for the battery device, a simpler structure, and easier assembly. Furthermore, different connection methods, such as welding, screwing, and riveting, can be used between the frame and the limiting beams to meet varying boundary requirements.

[0035] In some possible implementations, the frame includes multiple steel sections connected end to end.

[0036] The frame is composed of multiple steel sections connected end to end, which has a simple structure, is easy to manufacture, has good precision, and high mechanical strength.

[0037] Secondly, embodiments of this application provide an electrical device, including the battery device provided by any of the above solutions.

[0038] The effect of the second aspect is the same as that of the first aspect, so it will not be repeated here.

[0039] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. 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:

[0041] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0042] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0043] Figure 3 This is a three-dimensional structural diagram of the housing in a battery device provided in some embodiments of this application;

[0044] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A;

[0045] Figure 5 This is a bottom view of the battery device provided in some embodiments of this application;

[0046] Figure 6 For along Figure 5A partial cross-sectional view of line AA in the diagram;

[0047] Figure 7 for Figure 6 A magnified view of the structure at point B in the middle;

[0048] Figure 8 This is a cross-sectional structural diagram of a partial structure in a battery device provided in other embodiments of this application;

[0049] Figure 9 for Figure 6 A magnified schematic diagram of the local structure at point C;

[0050] Figure 10 This is a three-dimensional structural diagram of the housing in a battery device provided in some other embodiments of this application.

[0051] The reference numerals in the detailed embodiments are as follows:

[0052] 1000, vehicles;

[0053] 100. Battery assembly; 200. Controller; 300. Motor;

[0054] 10. Housing; 11. Cover; 12. Tray; 13. Frame; 131. Fourth Plate; 14. Limiting Beam; 141. First Plate; 15. Longitudinal Beam; 151. Second Plate; 152. Third Plate; 153. Third Accommodation Space; 16. Insulating Component; 17. Support Plate; 171. Protruding Structure; 18. Second Buffer Structure; 19. Thermal Management Component; 191. Thermal Conductive Structure; 192. Structural Adhesive; 193. First Buffer Structure and / or Temperature Regulation Structure; 20. Battery Cell; 30. Corner Plate;

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

[0056] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0058] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0059] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0060] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0061] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0062] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0063] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0064] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0065] The frame of the housing is mainly made of roll forming or profile structure, which has at least the following problems: the strength of profile or roll forming frame is low, requiring the processing of a large cross-sectional size to ensure bending and torsional stiffness, resulting in complex structure and indirectly reducing the energy density of the battery device; the sides of the frame need to be lined with inner sheet metal to reduce deformation during side impacts.

[0066] To address the aforementioned issues, this application provides a battery device. This battery device uses a frame, at least a first portion of which is constructed of shaped steel. This design provides the frame with high mechanical strength and structural stability, making it less prone to bending and deformation after impact. Since the first portion may contact or transmit force to the battery cells, its resistance to bending and deformation under external force reduces the likelihood of force being transmitted to the battery cells. This, in turn, lowers the risk of damage to the battery cells. Furthermore, it eliminates the need for a large cross-sectional dimension in the frame while maintaining bending and torsional stiffness, thus reducing the frame's volume and minimizing its negative impact on the battery device's energy density.

[0067] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage devices, energy storage systems, and charging networks that use the battery as an energy storage element. 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. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0068] 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.

[0069] Please refer to Figure 1 , Figure 1This is a schematic diagram of the structure of a vehicle 1000 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 provided 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.

[0070] 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.

[0071] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 10 and battery cells 20, with the battery cells 20 housed within the housing 10.

[0072] The housing 10 provides a storage space for the battery cells 20, and can adopt various structures. In some embodiments, the housing 10 may include a cover 11 and a tray 12. The cover 11 covers the tray, and together with the tray 12, defines a first storage space for accommodating the battery cells 20. The tray 12 may be a hollow structure with one open end, and the cover 11 may be a plate-like structure, covering the open side of the tray 12 so that the cover 11 and the tray 12 together define the first storage space; the cover 11 and the tray 12 may also be hollow structures with side openings, with the open side of the cover 11 covering the open side of the tray 12. Of course, the housing 10 formed by the cover 11 and the tray 12 can be of various shapes, such as a circular through-hole, a cuboid, etc. The tray 12 is an important structural support component in the battery system, used to store and protect the battery cells, and also has a significant impact on the collision safety of the vehicle and the overall torsional and bending stiffness of the vehicle body.

[0073] A battery cell 20 refers to the smallest unit that makes up a battery. Multiple battery cells 20 can be provided, and these cells can be connected in series, parallel, or mixed connection via a busbar. Mixed connection means that multiple battery cells 20 can be connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or mixed connection, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, the battery device 100 can also be formed by first connecting multiple battery cells 20 in series, parallel, or mixed connection to form a battery module, and then connecting multiple battery modules in series, parallel, or mixed connection 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 for electrical connection between the multiple battery cells 20. As an example, multiple battery cells 20 can form a battery module, which is formed by arranging and fixing multiple battery cells 20 into an independent module. As an example, a battery module can be formed by binding multiple battery cells 20 together with cable ties.

[0074] Each battery cell 20 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell that can be recharged after discharge to activate the active materials and continue to be used. The battery cell 20 can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and this application embodiment is not limited to this. The battery cell can have a circular through-body, a flat body, a cuboid, or other shapes.

[0075] Please refer to Figure 2 and Figure 3 , Figure 3 This is a three-dimensional structural diagram of the housing in a battery device provided in some embodiments of this application. The battery device includes a housing 10 and battery cells 20 disposed within the housing 10. The housing 10 includes a frame 13 and a limiting beam 14. The frame 13 encloses a first receiving space. The limiting beam 14 is disposed within the first receiving space, and both ends of the limiting beam 14 are connected to the frame 13 in a first direction X. At least a first portion of the frame 13 is made of structural steel. On a projection plane perpendicular to the first direction X, the orthographic projection of the first portion overlaps with the orthographic projection of the battery cell 20; and / or, on a projection plane perpendicular to a second direction Y, the orthographic projection of the first portion overlaps with the orthographic projection of the battery cell 20. The second direction Y is perpendicular to the first direction X.

[0076] The frame 13 is generally formed by connecting multiple components end to end. The frame 13 enclosing the first receiving space means that the multiple components constituting the frame 13 enclose a first receiving space that is open at both ends in the height direction. The first part is the portion of the frame 13 that is in direct contact with the battery cell 20 or where there is a possibility of force transmission between them. For example, the first part may initially be spaced apart from the battery cell 20, but after the battery device is subjected to external force, the battery cell 20 or the first part may come into contact and transmit force due to displacement, deformation, or other reasons.

[0077] The limiting beam 14 is a beam structure that contacts the large surface of the battery cell 20 and is used to suppress the expansion of the battery cell 20. The large surface of the battery cell 20 is the surface defined by the length and height directions of the battery cell 20.

[0078] The limiting beam 14 is set along the first direction X, meaning that the length direction of the limiting beam 14 is set along the first direction X. The two ends of the limiting beam 14 in the first direction X are generally connected to the frame 13.

[0079] In this embodiment, the limiting beam 14 can be set to one, two, three or more, depending on the usage requirements.

[0080] On a projection plane perpendicular to the first direction X, the orthographic projection of the first part overlaps with the orthographic projection of the battery cell 20; and / or, on a projection plane perpendicular to the second direction, the orthographic projection of the first part overlaps with the orthographic projection of the battery cell, including the following situations: First, on a projection plane perpendicular to the first direction X, the orthographic projection of the first part overlaps with the orthographic projection of the battery cell 20. In this scheme, the first part is located on one or both sides of the battery cell 20, generally perpendicularly connected to the limiting beam 14, or can be connected at an angle, or connected through other components, depending on the usage requirements; Second The second type is where the orthographic projection of the first part overlaps with the orthographic projection of the battery cell on a projection plane perpendicular to the second direction. In this scheme, the first part is positioned opposite to the limiting beam 14 in the second direction, and the first part is in contact with the large surface of the battery cell. The third type is where the orthographic projection of the first part overlaps with the orthographic projection of the battery cell 20 on a projection plane perpendicular to the first direction X, and also overlaps with the orthographic projection of the battery cell on a projection plane perpendicular to the second direction. In this scheme, the first part can be a U-shaped structure or an L-shaped structure, forming an accommodating space for placing the battery cell with the limiting beam.

[0081] The cross-sectional shape of the steel profile can be H-shaped, I-shaped, or U-shaped, depending on the specific application requirements.

[0082] Since the first part of the frame 13 may come into contact with or transmit force to the battery cell 20, the solution provided in this embodiment sets the first part of the frame 13 as a steel profile. This gives the frame 13 high mechanical strength and structural stability, making it less prone to bending and deformation after being subjected to external impact. Because the first part may come into contact with or transmit force to the battery cell 20, its resistance to bending and deformation under external force makes it less likely for external force to be transmitted to the battery cell 20. This reduces the risk of damage to the battery cell 20 to a certain extent. Furthermore, the frame 13 does not need to be machined with a large cross-sectional size to ensure bending and torsional stiffness, which also reduces the volume of the frame 13 to a certain extent and reduces its adverse impact on the energy density of the battery device.

[0083] Furthermore, by adopting the solution provided in this application embodiment, the inner liner plate located on the inner side of the frame 13 in related technologies can be eliminated, thereby reducing the number of components required for the battery device and simplifying the structure. The aforementioned inner liner plate is used to increase the bending resistance and torsional stiffness of the frame 13.

[0084] like Figure 3 As shown, in some embodiments, multiple limiting beams 14 are provided. The multiple limiting beams 14 are spaced apart along the second direction Y. A battery cell 20 is disposed between two adjacent limiting beams 14. And two adjacent limiting beams 14 are connected by a first portion. That is, at least the portion of the frame 13 located between two adjacent limiting beams 14 is made of structural steel.

[0085] The portion of the frame 13 located between at least two adjacent limiting beams 14 is made of steel. It can be that only the portion of the frame 13 located between two adjacent limiting beams 14 is made of steel, or the other portions of the frame 13 are also made of steel, or a portion of the remaining portion of the frame 13 is made of steel, depending on the specific needs of use.

[0086] In this embodiment, two, three, or more limiting beams 14 can be provided, depending on the specific needs of use.

[0087] The solution provided in this embodiment allows both ends of the battery module formed by combining multiple battery cells to contact the limiting beam 14, which can limit the expansion of the battery module. At the same time, two adjacent limiting beams 14 are connected by a first part made of steel, which can make the connection structure between the frame 13 and the limiting beam 14 stable and the connection between the two is not easy to crack.

[0088] like Figure 3 As shown, in some embodiments, the box body 10 further includes longitudinal beams 15. Two adjacent limiting beams 14 are also connected by longitudinal beams 15. The cross-sectional shape of the longitudinal beams 15 can be H-shaped, I-shaped, or U-shaped, etc.

[0089] The longitudinal beam 15 can suppress the limiting beam 14 from protruding outward along the second direction Y under the expansion force of the battery cell. At the same time, the longitudinal beam 15 eliminates the need for a steel strip connecting two adjacent limiting beams 14 in the battery device.

[0090] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0091] like Figure 4 As shown, in some embodiments, the limiting beam 14 has a first plate 141 extending toward the side where the longitudinal beam 15 is located. At least a portion of the longitudinal beam 15 is stacked and connected to the first plate 141.

[0092] The first plate 141 can be integrally formed with the limiting beam 14, or it can be separately connected to the limiting beam 14, depending on the usage requirements.

[0093] The first plate 141 can increase the connection area between the longitudinal beam 15 and the limiting beam 14, making the connection between the longitudinal beam 15 and the limiting beam 14 more stable.

[0094] like Figure 3 As shown, in some embodiments, multiple longitudinal beams 15 are provided. The multiple longitudinal beams 15 are spaced apart along a first direction X. A second receiving space is formed between two adjacent longitudinal beams 15. A single battery cell is disposed within the second receiving space.

[0095] The second accommodating space is the interval between two adjacent longitudinal beams 15, which can be used to place battery cells 20. One or more rows of battery cells 20 can be arranged in the same second accommodating space, depending on the usage requirements.

[0096] Multiple longitudinal beams 15 are provided, which can connect multiple areas of the limiting beam 14 to the longitudinal beam 15. This can suppress the multiple areas of the limiting beam 14 from bulging outward along the second direction Y under the action of the expansion force of the battery cell 20, thereby helping to suppress the expansion of the battery cell 20 at different positions.

[0097] Figure 5 This is a bottom view of the battery device provided in some embodiments of this application; Figure 6 For along Figure 5 A partial cross-sectional view of line AA in the diagram; Figure 7 for Figure 6 A magnified schematic diagram of the structure at point B in the middle.

[0098] like Figures 5 to 7As shown, in some embodiments, the bottom of the longitudinal beam 15 has a second plate 151 extending toward the second receiving space. On a projection plane parallel to the first direction X and the second direction Y, the orthographic projection of the second plate 151 at least partially overlaps with the orthographic projection of the battery cell 20. An insulating member 16 is provided on the side of the second plate 151 facing the battery cell 20. The second plate 151 is electrically isolated from the battery cell 20 by the insulating member 16.

[0099] In this embodiment, the longitudinal beam 15 can be made of steel with flanges at the bottom, such as I-beams or T-beams. The second plate 151 is the flange at the bottom of the aforementioned steel.

[0100] On a projection plane parallel to the first direction X and the second direction Y, the orthographic projection of the second plate 151 at least partially overlaps with the orthographic projection of the battery cell 20, meaning that at least a portion of the battery cell 20 can be pressed onto the second plate 151. Due to the high mechanical strength of the steel profile, the elastic deformation of the longitudinal beam 15 is small when the battery assembly is subjected to vibration and impact, and the stress transmitted to the battery cell 20 is also small. Furthermore, the battery cell 20 is typically fixed to the bottom plate of the housing 10 or the second plate 151 by adhesive. Adhesive failure is usually related to cyclic stress (fatigue caused by repeated deformation) or instantaneous overload. The smaller deformation of the steel profile directly reduces these two risks, thus lowering the risk of the battery cell 20 detaching from the adhesive.

[0101] Figure 8 This is a cross-sectional structural diagram of a partial structure in a battery device provided in some other embodiments of this application.

[0102] like Figure 4 and Figure 8 As shown, in some embodiments, the top of the longitudinal beam 15 has a third plate 152 disposed opposite to the second plate 151. A third receiving space 153 is formed between the third plate 152 and the second plate 151. A first buffer structure and / or a temperature regulating structure 193 are provided in the third receiving space 153.

[0103] Relative arrangement refers to the second plate 151 and the third plate 152 being arranged face-to-face with a gap between them.

[0104] The third accommodating space 153 is a space for accommodating the first buffer structure and / or temperature regulating structure 193, and this space is open on the side facing the battery cell 20. The first buffer structure and / or temperature regulating structure 193 can be in direct contact with the battery cell 20 or be spaced apart, depending on the usage requirements.

[0105] The third accommodating space 153 is provided with a first buffer structure and / or a temperature regulating structure 193, including the following options: First, the third accommodating space 153 is provided with a first buffer structure; Second, the third accommodating space 153 is provided with a temperature regulating structure; Third, the third accommodating space 153 is provided with both a first buffer structure and a temperature regulating structure.

[0106] The first buffer structure refers to a component or material layer specifically designed to absorb, disperse, or isolate dynamic loads (such as vibration, impact, and collision). The first buffer structure can be an elastic pad (such as a rubber pad, silicone pad, polyurethane pad, etc.), a porous structure (such as metal foam, foamed plastic, etc.), etc.

[0107] The temperature regulation structure is used to regulate the temperature of the battery cell 20. It can be a heating structure, such as a heating element or a heating film, or a liquid cooling pipe.

[0108] When the third accommodating space 153 is equipped with a first buffer structure, the first buffer structure can convert the impact kinetic energy into heat energy or other forms of energy through elastic deformation (such as rubber), plastic deformation (such as metal foam), or damping effect (such as viscoelastic materials), thereby reducing the impact kinetic energy received by the battery cell 20 and thus reducing the risk of damage to the battery cell 20. When the third accommodating space 153 is equipped with a temperature regulating structure, the temperature regulating structure can adjust the temperature of the battery cell 20, ensuring that the temperature of the battery cell 20 is always within a preset range, which is beneficial for the battery cell 20 to maintain a stable working state.

[0109] In some embodiments, the longitudinal beam 15 has a cavity, and the cavity is provided with a temperature regulating structure.

[0110] In this embodiment, the longitudinal beam 15 can adopt a cross-section with a square or groove shape, etc., which can be determined according to the usage requirements.

[0111] The longitudinal beam 15 has a cavity, and the temperature regulation structure is located inside the cavity, which makes the battery device structure compact. At the same time, the temperature regulation structure can adjust the temperature of the battery cell 20, so that the temperature of the battery cell 20 is always within a preset range, which helps the battery cell 20 maintain a stable working state.

[0112] Figure 9 for Figure 6 A magnified schematic diagram of the structure at point C.

[0113] like Figure 7 and Figure 9As shown, in some embodiments, the housing 10 further includes a support plate 17 connected to the frame 13. The support plate 17 has a first region and a second region. The first region is used to support the battery cell 20. The second region is used to support at least the limiting beam 14 and the longitudinal beam 15. The second region has a protrusion structure 171 protruding toward the side where the limiting beam 14 is located. The support plate 17 is connected to the limiting beam 14 and / or the longitudinal beam 15 through the protrusion structure 171.

[0114] The support plate 17 may include one or more plates. When the support plate 17 includes multiple plates, the multiple plates may be sequentially spliced ​​together along the first direction X or the second direction Y to form the support plate 17, or they may be stacked along the thickness direction of the plates, depending on the application requirements.

[0115] The frame 13 and the support plate 17 can be connected by welding, plugging or other methods.

[0116] The first region and the second region are two different regions within the support plate 17. The first region is the portion covered only by the battery cells and is used solely to support the battery cells. The second region is the portion of the support plate 17 covered by the limiting beam 14 and the longitudinal beam 15. It may be used solely to support the limiting beam 14 and the longitudinal beam 15, or it may be used to support some battery cells in addition to the limiting beam 14 and the longitudinal beam 15 (as in the case where at least a portion of the battery cells is located on the longitudinal beam 15).

[0117] The protruding structure 171 can be integrally formed on the support plate 17, or it can be separately connected to the support plate 17, depending on the application requirements.

[0118] The protruding structure 171 is connected to the limiting beam 14 and / or the longitudinal beam 15 in the following ways: First, the protruding structure 171 is connected to the limiting beam 14; second, the protruding structure 171 is connected to the longitudinal beam 15; third, the protruding structure 171 is connected to both the limiting beam 14 and the longitudinal beam 15.

[0119] It is understandable that when the protruding structure 171 is connected to both the limiting beam 14 and the longitudinal beam 15, there may be multiple protruding structures 171, with some of the protruding structures 171 connected to the limiting beam 14 and others connected to the longitudinal beam 15. Alternatively, in some of the protruding structures 171, the same protruding structure 171 may be connected to both the limiting beam 14 and the longitudinal beam 15.

[0120] The support plate 17 is connected to the limiting beam 14 and / or the longitudinal beam 15 through the protruding structure 171. The protruding structure 171 is located in the second area of ​​the support plate 17 that does not directly transmit force to the battery cell 20. In this way, when the support plate 17 is subjected to external impact, the impact force can be transmitted to other areas of the housing 10 through the limiting beam 14 and / or the longitudinal beam 15, reducing the impact force transmitted from the support plate 17 to the battery cell 20, thereby reducing the risk of damage to the battery cell 20.

[0121] like Figure 6 and Figure 7 As shown, in some embodiments, a second buffer structure 18 is provided on the side of the first region facing the battery cell 20.

[0122] The material and structure of the second buffer structure 18 can be the same as or different from the material and structure of the first buffer structure, depending on the specific needs of use.

[0123] The second buffer structure 18 can reduce the impact force transmitted from the support plate 17 to the battery cell 20, thereby reducing the risk of damage to the battery cell 20.

[0124] like Figure 6 As shown, in some embodiments, the housing 10 further includes a thermal management component 19. The thermal management component 19 is disposed on the side of the limiting beam 14 opposite to the support plate 17, or on the support plate 17. The thermal management component 19 is in thermally conductive contact with the battery cell 20.

[0125] Thermal management component 19 refers to a structure used to cool the battery cell 20, and may include liquid cooling pipes, current collectors, etc.

[0126] The thermal management component 19 can be located on the side of the limiting beam 14 away from the support plate 17, or it can be located inside the support plate 17, on the upper surface of the support plate 17, or on the lower surface of the support plate 17, depending on the application requirements.

[0127] The thermal management component 19 facilitates the cooling of the battery cell 20, making the battery cell 20 less prone to thermal runaway.

[0128] When the aforementioned thermal management component 19 is located on the side of the limiting beam 14 away from the support plate 17, the thermal management component 19 can be connected to the cover 11 of the housing 10, so that the cover 11 of the housing 10 and the thermal management component 19 can be combined into a whole, which facilitates overall installation.

[0129] like Figure 6 As shown, in some embodiments, the thermal management component 19 is in thermal contact with the battery cell 20 through a thermally conductive structure 191.

[0130] The thermally conductive structure 191 refers to the intermediate medium that establishes an efficient thermal path between the battery cell 20 and the thermal management component 19, and can be a thermally conductive silicone pad, phase change material, etc.

[0131] Since the heat-conducting structure 191 generally has high thermal conductivity, its arrangement allows for rapid heat exchange between the battery cell 20 and the thermal management component 19. Compared to heat exchange between the battery cell 20 and the thermal management component 19 via air convection, this reduces the thermal resistance between them and facilitates rapid cooling of the battery cell 20. Figure 6 As shown, in some embodiments, the thermal management component 19 is connected to the limiting beam 14 and / or the longitudinal beam 15 via structural adhesive 192. This ensures a stable connection of the thermal management component 19.

[0132] like Figure 3 As shown, in some embodiments, the longitudinal beam 15 is a steel section.

[0133] The cross-sectional shape of the longitudinal beam 15 can be H-shaped, I-shaped, or square-shaped.

[0134] The longitudinal beam 15 is made of shaped steel, which has a simple structure, is easy to manufacture, has good precision, and high mechanical strength.

[0135] like Figure 4 As shown, in some embodiments, the limiting beam 14 and the frame 13 are connected by a first connector, and the longitudinal beam 15 and the limiting beam 14 are connected by a second connector. Both the first connector and the second connector include an angle plate 30.

[0136] Both the first and second connecting members may consist only of corner plates 30, which are connected to the limiting beam 14, the frame 13, or the longitudinal beam 15 by welding. Alternatively, in addition to the corner plates 30, the first and second connecting members may include other structures, such as bolts, with the corner plates 30 connected to the limiting beam 14, the frame 13, or the longitudinal beam 15 by bolts. The specific details can be determined according to the connection requirements.

[0137] Among them, the corner plate 30, as a connector, has the characteristics of standardization and easy processing (such as laser cutting / stamping), and the corner plate 30 can be adapted to the connection between components with different spacing or angles by adjusting the mounting hole position or its own size (such as the side length of the L-shaped corner plate 30).

[0138] The limiting beam 14 and the frame 13 are connected by corner plates 30, and the longitudinal beam 15 and the limiting beam 14 are connected by corner plates 30. This simplifies the complex welding or riveting processes between the limiting beam 14 and the frame 13, and between the longitudinal beam 15 and the limiting beam 14, reducing assembly difficulty. It also improves the bending and torsional stiffness and side-impact stiffness of the battery pack to some extent. Bending and torsional stiffness includes bending stiffness and torsional stiffness. Bending stiffness refers to the battery pack's ability to resist bending deformation when subjected to vertical forces (such as vehicle bumps or the battery pack's own weight). Torsional stiffness refers to the battery pack's ability to resist torsional deformation when subjected to torque (such as a vehicle driving over a pothole on one side or making a sharp turn). Side-impact stiffness refers to the battery pack's ability to resist deformation and protect the battery cells 20 during side collisions (such as a vehicle being hit from the side).

[0139] In addition, the corner plate 30 can also be used to factor the manufacturing dimensional tolerances between the frame 13 and the limiting beam 14, and between the limiting beam 14 and the longitudinal beam 15, simplifying the connection structure and reducing the connection stress that may exist between the frame 13 and the limiting beam 14, and between the limiting beam 14 and the longitudinal beam 15.

[0140] like Figure 9 As shown, in some embodiments, the frame 13 has a fourth plate 131 extending toward the side where the limiting beam 14 is located. At least a portion of the limiting beam 14 is stacked and connected to the fourth plate 131.

[0141] The fourth plate 131 can be integrally formed with the steel section of the frame 13, or it can be separately connected to the steel section of the frame 13, depending on the application requirements. The limiting beam 14 and the fourth plate 131 can be connected by welding, screwing, riveting, etc., depending on the application requirements.

[0142] At least a portion of the limiting beam 14 is stacked and connected to the fourth plate 131, which can increase the connection area between the steel in the frame 13 and the limiting beam 14, making the connection between the frame 13 and the limiting beam 14 stable, and facilitating the transmission and dispersion of force, resulting in a good stress structure.

[0143] In some embodiments, the limiting beam 14 is a steel section.

[0144] In related technologies, the limiting beam 14 of the housing 10 is mainly a roll-formed or profile structure, and the expansion and deformation of the battery cell 20 is mainly controlled by the front and rear limiting beams 14 and steel pressure strips. The main problems are: the limiting beam 14 has poor stiffness, and steel strips need to be added to assist in controlling the expansion and deformation of the battery cell 20.

[0145] In this embodiment, the limiting beam 14 is made of structural steel, which gives it high mechanical strength and makes it less prone to deformation. This eliminates the need for the aforementioned longitudinal beam 15 and steel strip between adjacent limiting beams 14, resulting in fewer components required for the battery device, a simpler structure, and easier assembly. Furthermore, the frame 13 and the limiting beam 14 can be connected using different processes depending on the boundary requirements, such as welding, screwing, or riveting.

[0146] In some embodiments, the frame 13 includes a plurality of steel profiles connected end to end.

[0147] In this embodiment, the frame 13 can be composed of multiple steel sections connected end to end, or it can include connectors connecting the steel sections in addition to the multiple steel sections, depending on the usage requirements.

[0148] Adjacent steel sections can be connected by welding. The frame 13 consists of multiple steel sections connected end to end, with a simple structure, convenient manufacturing, good precision, and high mechanical strength.

[0149] According to some embodiments of this application, this application also provides an electrical device, including a battery device, energy storage device, or energy storage system provided by any of the above solutions. The battery device, energy storage device, or energy storage system is used to store or provide electrical energy.

[0150] The electrical device can be any of the aforementioned battery-powered devices or systems.

[0151] The electrical device provided in this application embodiment includes the above-mentioned battery device, energy storage device or energy storage system, which can achieve the same effect, and will not be described in detail here.

[0152] like Figures 3 to 10 As shown, one embodiment of this application provides a battery device, relating to the fields of power batteries, energy storage batteries, and mechanical devices. The battery device includes a housing 10 and battery cells 20 disposed within the housing 10. The housing 10 includes a frame 13, limiting beams 14, and longitudinal beams 15. The frame 13 encloses a first receiving space. The limiting beams 14 are disposed within the first receiving space and connected to the frame 13. The limiting beams 14 are arranged along a first direction X. Multiple limiting beams 14 are provided. The multiple limiting beams 14 are spaced apart along a second direction Y. The battery cells 20 are disposed between the multiple limiting beams 14. The ends of two adjacent limiting beams 14 are connected via the frame 13, and two adjacent limiting beams 14 are also connected via the longitudinal beams 15.

[0153] The frame 13 of the housing 10 is constructed by welding together steel profiles (such as U-shaped, H-shaped, I-shaped, etc.). Similarly, the longitudinal beam 15 of the battery assembly is also made of steel profiles (such as U-shaped, H-shaped, I-shaped, T-shaped, etc.). The frame 13 and longitudinal beam 15 can be connected to the limiting beam 14 and related components using different processes, such as welding, screwing, or riveting, depending on different boundary requirements. Unlike existing battery assembly designs, the frame 13 and longitudinal beam 15, made of steel profiles (such as U-shaped, H-shaped, I-shaped, etc.), can have simpler cross-sections due to their inherent material rigidity, making them easier to manufacture, more precise, and stronger. Furthermore, conventional steel strips used to improve the overall expansion resistance of the battery assembly and inner lining plates used to increase the bending and torsional stiffness of the housing 10 can be eliminated, as can the steel strips used to connect the limiting beam 14.

[0154] In this embodiment, the frame 13, longitudinal beam 15, and limiting beam 14 are connected by a specific connection process (welding, screwing, riveting, etc.). The battery cell 20 can be installed on the longitudinal beam 15. Since the longitudinal beam 15 is made of steel, the steel has high strength, and the bottom of the battery cell 20 deforms little under vibration and impact, resulting in a low risk of the battery cell 20 delaminating.

[0155] The cross-section of the longitudinal beam 15 can be of various forms such as H-shaped, I-shaped, and square-shaped.

[0156] When the longitudinal beam 15 has a cavity in the center, the cavity can be used as part of the flow channel to cool the side of the battery cell 20.

[0157] The longitudinal beam 15 and the limiting beam 14 are connected by an angle plate 30, which has good processability and dimensional adjustability, while improving the bending, torsion and side impact rigidity of the battery device.

[0158] The frame 13, limiting beam 14, and longitudinal beam 15 of the box body 10 are connected in the Z direction. That is, the frame 13 has a flange facing the limiting beam 14, the limiting beam 14 is located on the flange, the limiting beam 14 has a flange facing the longitudinal beam 15, and the longitudinal beam 15 is located on the flange of the limiting beam 14, which has a good stress structure.

[0159] In some embodiments, the cover 11 of the housing 10 is provided with a water-cooling structure, and the cover and the water-cooling plate are integrated into one; the longitudinal beam 15 made of steel and the water-cooling plate can be glued or welded (when the water-cooling plate material is stainless steel). The longitudinal beam 15 made of steel and the limiting beam 14 are connected by angle plates 30 (welded, riveted, bolted), and the longitudinal beam 15 made of steel has long rounded corners to absorb the dimensional tolerances in the front and rear directions of the housing 10.

[0160] In other embodiments, both the frame 13 and the limiting beam 14 are connected to the water-cooled plate at their bottoms. Connection methods include, but are not limited to, FDS connection, resistance riveting and spot welding, screwing, riveting (when the cold plate material is aluminum), or spot welding (when the cold plate material is stainless steel). These connection processes offer diverse strengths and good airtightness. Among them, FDS (Flow Drill Screwing) is a rivet-free, weld-free, single-sided connection technology.

[0161] The battery cell 20 is mounted on the flange surface of the longitudinal beam 15 made of steel profile, which optimizes the overall stress of the housing 10.

[0162] The bottom of the housing 10 is sealed by a support plate 17. The frame 13, limiting beam 14, and longitudinal beam 15 are all located on the same side of the support plate 17, and the frame 13 is connected to the support plate 17. A portion of the support plate 17 (excluding the area of ​​the battery cell 20) has a protruding structure 171, which connects to the limiting beam 14 and the longitudinal beam 15 made of steel. The connection methods include, but are not limited to, spot welding, adhesive bonding, and bolting. The connection between the support plate 17 and the limiting beam 14 and the longitudinal beam 15 effectively disperses the impact force of the bottom ball, while the cavity between the battery cell 20 and the support plate 17 is filled with buffer material, significantly improving the bottom ball's performance.

[0163] The top-mounted water-cooled plate and the battery cell 20 use thermally conductive silicone sheets to transfer heat energy, and the battery cell 20 is water-cooled at the shoulder. The top of the steel frame and the water-cooled plate are connected with structural adhesive 192 to increase the overall rigidity.

[0164] In existing technologies, the limiting beams 14 of the housing 10 are mainly roll-formed or profile structures. The housing 10 is welded from profiles or roll-formed beams, and the expansion and deformation of the battery cells 20 are mainly controlled by the front and rear limiting beams 14 and steel pressure strips. The main problems are: the limiting beams 14 have poor rigidity, requiring the addition of steel strips to assist in controlling the expansion and deformation of the battery cells 20; the connection between the cold plate and the limiting beams 14 requires double-layer rivet nuts, which is complex and poses a risk of airtightness failure; and the connection method between the frame 13 of the housing 10 and the limiting beams 14 is simplistic.

[0165] In this embodiment, the frame 13 is constructed by welding together steel profiles (such as U-shaped, H-shaped, I-shaped, etc.). Similarly, the limiting beam 14 is also constructed using steel profiles (such as U-shaped, H-shaped, I-shaped, etc.). The frame 13 and the limiting beam 14 can be connected using different processes depending on boundary requirements, such as welding, screwing, or riveting. Unlike existing battery device designs, the steel profiles (such as U-shaped, H-shaped, I-shaped, etc.) frame 13 and limiting beam 14, due to their inherent material rigidity, can have simpler cross-sections, making them easier to manufacture, more precise, and stronger. Furthermore, conventional steel strips used to enhance the overall expansion resistance of the battery device, as well as inner lining plates and longitudinal beams 15 of the housing 10 used to increase the bending and torsional stiffness of the housing 10, can be eliminated.

[0166] The cross-sections of the frame 13 and the limiting beam 14 made of steel are, but are not limited to, U-shaped, H-shaped, mountain-shaped, and I-shaped cross-sections, depending on the overall performance requirements of the battery device housing 10.

[0167] The frame 13 of the box body 10 and the limiting beam 14 are connected by adding an angle plate 30 or a similar structure to absorb the manufacturing dimensional tolerances between the frame 13 of the steel box body 10 (U-shaped, H-shaped, I-shaped, or other cross-sections) and the limiting beam 14, simplifying the connection structure and reducing the connection stress that may exist between the frame 13 of the steel box body 10 and the limiting beam 14 made of steel. The limiting beam 14 has elongated rounded corners to absorb the tolerances in the left-right direction of the box body 10.

[0168] The frame 13 and the limiting beam 14 form the main frame of the battery device, serving as the main force transmission path for vibration and impact before the battery device. The high material strength and reasonable frame structure improve the bending and torsional stiffness of the battery device, and the sufficient width of the steel frame 13 (such as U-shaped, H-shaped, I-shaped, etc.) also enhances the overall side impact stiffness of the battery device.

[0169] Based on the above embodiments, when the frame 13 is provided with a mounting structure, the mounting structure can be made of steel or other metal materials, depending on the usage requirements.

[0170] 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, The device includes a housing and battery cells disposed within the housing. The housing includes a frame and a limiting beam. The frame forms a first accommodating space, and the limiting beam is disposed within the first accommodating space. Both ends of the limiting beam are connected to the frame in a first direction. At least the first part of the frame is made of structural steel. On a projection plane perpendicular to the first direction, the orthographic projection of the first portion overlaps with the orthographic projection of the battery cell; And / or, on a projection plane perpendicular to the second direction, the orthographic projection of the first portion overlaps with the orthographic projection of the battery cell, and the second direction is perpendicular to the first direction; The limiting beams are provided in multiple ways, and the multiple limiting beams are spaced apart along the second direction. The battery cell is located between two adjacent limiting beams, and the two adjacent limiting beams are connected through the first part. The box body also includes longitudinal beams, and two adjacent limiting beams are connected by the longitudinal beams; The limiting beam has a first plate extending toward the side where the longitudinal beam is located, and at least a portion of the longitudinal beam is stacked and connected to the first plate; The housing also includes a support plate connected to the frame. The support plate has a first region and a second region connected to each other. The first region is used to support the battery cell, and the second region is used to support at least the limiting beam and the longitudinal beam. The second region has a protruding structure protruding toward the side where the limiting beam is located. The support plate is connected to the limiting beam and / or the longitudinal beam through the protruding structure.

2. The battery device as claimed in claim 1, characterized in that, The longitudinal beams are provided in multiple ways, and the multiple longitudinal beams are spaced apart along the first direction. A second receiving space is formed between two adjacent longitudinal beams, and the battery cell is located in the second receiving space.

3. The battery device as claimed in claim 2, characterized in that, The bottom of the longitudinal beam has a second plate extending toward the second accommodating space; on a projection plane parallel to the first direction and the second direction, the orthographic projection of the second plate overlaps at least partially with the orthographic projection of the battery cell; an insulating member is provided on the side of the second plate facing the battery cell, and the second plate is electrically isolated from the battery cell through the insulating member.

4. The battery device as claimed in claim 3, characterized in that, The top of the longitudinal beam has a third plate disposed opposite to the second plate, and a third receiving space is formed between the third plate and the second plate. The third receiving space is provided with a first buffer structure and / or a temperature regulating structure.

5. The battery device as claimed in claim 1, characterized in that, The longitudinal beam has a cavity, and the cavity is equipped with a temperature regulating structure.

6. The battery device as claimed in claim 1, characterized in that, The first region has a second buffer structure on the side facing the battery cell.

7. The battery device as claimed in claim 1, characterized in that, The housing also includes a thermal management component, which is located on the side of the limiting beam away from the support plate, or on the support plate; the thermal management component is in thermally conductive contact with the battery cell.

8. The battery device as claimed in claim 7, characterized in that, The thermal management component makes thermal contact with the battery cell through a thermally conductive structure.

9. The battery device according to any one of claims 1-8, characterized in that, The longitudinal beams are made of structural steel.

10. The battery device according to any one of claims 1-8, characterized in that, The limiting beam and the frame are connected by a first connector, and the longitudinal beam and the limiting beam are connected by a second connector; both the first connector and the second connector include corner plates.

11. The battery device according to any one of claims 1-8, characterized in that, The frame has a fourth plate extending toward the side where the limiting beam is located, and at least a portion of the limiting beam is stacked and connected to the fourth plate.

12. The battery device according to any one of claims 1-8, characterized in that, The limiting beam is made of steel.

13. The battery device according to any one of claims 1-8, characterized in that, The frame consists of multiple steel sections connected end to end.

14. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-13.

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