Battery case, battery, and electric device

Abstract

Provided in the present application are a battery case, a battery, and an electric device. The battery case comprises: an accommodating space, which is configured to accommodate battery cells; and load-bearing beams, which are arranged along the periphery of the accommodating space. Each load-bearing beam comprises a wall and a stiffener which are independently formed, the wall being bent and enclosing a first cavity, and the stiffener being arranged in the first cavity and connected to the wall.

Description

Battery box, battery and electrical device

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202420574366.9, filed on March 22, 2024, entitled “Battery Case, Battery and Electrical Device,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery box, a battery, and an electrical device. Background Art

[0004] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and power tools.

[0005] As the main energy-absorbing component of the battery box, the load-bearing beam is crucial to the stable and reliable operation of the battery. Its anti-collision performance directly affects the reliability of the battery. Therefore, how to effectively improve the anti-collision performance of the load-bearing beam is an urgent problem to be solved in battery technology. Summary of the Invention

[0006] In view of the above problems, the present application provides a battery box, a battery and an electrical device, which can effectively enhance the anti-collision performance of the load-bearing beam to improve the reliability of the battery.

[0007] In a first aspect, embodiments of the present application provide a battery case comprising a storage space for accommodating battery cells and a load-bearing beam disposed along the periphery of the storage space. The load-bearing beam comprises an independently formed wall body and a reinforcement member. The wall body is integrally bent and arranged to enclose a first cavity. The reinforcement member is disposed within the first cavity and connected to the wall body. In a cross section of the load-bearing beam perpendicular to its extension direction, both free ends of the wall body are located within the first cavity.

[0008] The reinforcement can support the wall to improve the overall anti-collision performance of the load-bearing beam. In addition, the independently formed reinforcement can adopt a more complex structure to further optimize its support effect on the wall and its anti-deformation ability, so that the overall anti-collision performance of the load-bearing beam can be further improved. In this way, the above technical solution can effectively enhance the anti-collision performance of the load-bearing beam to improve the reliability of the battery. In addition, the two free ends of the wall are both located in the first cavity, which can not only reduce the risk of damage to the free end connection by the external environment to improve the connection reliability of the two free ends of the wall, but also reduce the space occupancy rate of the load-bearing beam, which is beneficial to improving the energy density of the battery.

[0009] In some embodiments of the first aspect, the wall is formed by roller bending. The roller bending process has the advantages of high material utilization, good quality consistency, superior structural performance and good surface quality.

[0010] In some embodiments of the first aspect, the wall body includes a first wall and a second wall arranged along a first direction, the first wall is located on a side of the second wall close to the accommodation space, and the reinforcement member includes a supporting portion connecting the first wall and the second wall.

[0011] According to the above technical solution, when the battery box is subjected to external impact or collision, the load-bearing beam needs to withstand a large force along the first direction. The support portion is connected between the first wall and the second wall, and can form a strong support for the first wall and the second wall, thereby improving the load-bearing beam's ability to resist deformation along the first direction, thereby further improving the load-bearing beam's anti-collision performance.

[0012] In some embodiments of the first aspect, the reinforcement further includes two connecting portions, the two connecting portions being respectively connected to two ends of the support portion along the first direction and extending along a second direction, wherein the first direction intersects the second direction. One of the two connecting portions is in contact with and connected to the first wall, and the other of the two connecting portions is in contact with and connected to the second wall.

[0013] Two connecting portions extend from the two ends of the support portion along the first direction and are arranged along the second direction. The extension direction of the two connecting portions intersects the extension direction of the support portion, thereby forming a three-dimensional support structure. This structural design not only enhances the structural stability of the reinforcement itself, but also increases the contact area between the reinforcement and the wall, thereby significantly improving the connection strength between the reinforcement and the wall, further enhancing the impact resistance of the load-bearing beam.

[0014] In some embodiments of the first aspect, there are multiple supporting portions, and the multiple supporting portions are spaced apart along the second direction, and the first direction intersects the second direction.

[0015] The above technical solution provides multiple support parts, which can support different positions of the wall along the second direction, and can further improve the supporting effect of the reinforcement on the wall, thereby further improving the anti-collision performance of the load-bearing beam.

[0016] In some embodiments of the first aspect, the reinforcement further comprises a plurality of connecting portions, wherein the plurality of connecting portions and the plurality of supporting portions are alternately connected along the second direction, wherein one of two adjacent connecting portions is in contact with and connected to the first wall, and the other is in contact with and connected to the second wall.

[0017] The above technical solution can not only improve the supporting effect of the reinforcement on the wall, but also improve the reliability of the reinforcement.

[0018] In some embodiments of the first aspect, the reinforcement member encloses a second cavity.

[0019] The above technical solution can further reduce the deformation of the load-bearing beam when the load-bearing beam is subjected to external impact or collision through the dual energy absorption effect of the second cavity and the first cavity, thereby further improving the anti-collision performance of the load-bearing beam.

[0020] In some embodiments of the first aspect, the stiffness of the reinforcement is greater than the stiffness of the wall.

[0021] The above technical solution effectively reduces the damage to the battery cells and related electrical components inside the battery box caused by external impact or collision by combining the high rigidity of the reinforcement and the moderate deformation of the wall, and can significantly improve the reliability of the battery.

[0022] In some embodiments of the first aspect, the thickness of the reinforcement is greater than the thickness of the wall.

[0023] The above technical solution combines the strong supporting effect of the reinforcement with the moderate deformation of the wall by adjusting the thickness, and the process flow is simple, which is conducive to reducing costs.

[0024] In some embodiments of the first aspect, the battery box further includes a box body, the accommodating space is provided in the box body, the box body includes a groove provided along the periphery of the accommodating space, and the load-bearing beam is inserted into the groove.

[0025] On the one hand, the groove of the above technical solution can play a certain positioning role in the assembly process of the load-bearing beam and the box body to facilitate the installation of the load-bearing beam; on the other hand, it can increase the contact area between the load-bearing beam and the box body to improve the connection firmness between the load-bearing beam and the box body.

[0026] In some embodiments of the first aspect, the groove is arranged on at least one side of the accommodating space along the first direction, the groove includes two wall portions opposite to each other along the second direction, the walls located at both ends of the load-bearing beam along the second direction are respectively connected to the two wall portions, and the first direction intersects with the second direction.

[0027] The above technical solution can significantly improve the stability of the load-bearing beam.

[0028] In some embodiments of the first aspect, a concave portion is provided on the side of the wall body facing away from the first cavity along the first direction, and a convex portion is provided on the side of the wall body facing the first cavity along the first direction, and the position of the convex portion corresponds to the position of the concave portion.

[0029] The above technical solution, on the one hand, can further improve the structural strength of the wall itself through the cooperation of the recessed portion and the convex portion, thereby further improving the anti-collision performance of the load-bearing beam; on the other hand, the recessed portion can form a certain accommodating space on the side of the wall body facing away from the first cavity, and the convex portion is located in the first cavity, thereby reducing the space occupancy rate of the load-bearing beam, which is beneficial to improving the energy density of the battery.

[0030] In some embodiments of the first aspect, there are multiple recesses, and the multiple recesses are spaced apart along the second direction, and the second direction intersects the first direction.

[0031] The above technical solution can further improve the structural strength of the wall itself, reduce the risk of cracking of the wall due to excessive local force; and further reduce the space occupancy rate of the load-bearing beam.

[0032] In some embodiments of the first aspect, the battery box further includes a mounting member connected to the wall and the reinforcement member.

[0033] The above technical solution can not only effectively improve the stability of the mounting member, but also further improve the local anti-collision performance of the load-bearing beam.

[0034] In a second aspect, the present application provides a battery, comprising a battery case provided in any embodiment of the first aspect and a plurality of battery cells, wherein the plurality of battery cells are accommodated in an accommodating space.

[0035] In a third aspect, the present application provides an electrical device comprising a battery provided in any embodiment of the second aspect, the battery being used to provide electrical energy.

[0036] In some embodiments of the third aspect, the electrical device is a vehicle, the vehicle includes a chassis, and the load-bearing beam is connected to the chassis.

[0037] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0039] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0040] FIG2 is a schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0041] FIG3 is a schematic structural diagram of a battery box provided in some embodiments of the present application;

[0042] FIG4 is a schematic structural diagram of a load-bearing beam provided in some embodiments of the present application;

[0043] FIG5 is a schematic structural diagram of another load-bearing beam provided in some embodiments of the present application;

[0044] FIG6 is a schematic structural diagram of another load-bearing beam provided in some embodiments of the present application;

[0045] FIG7 is a schematic structural diagram of another load-bearing beam provided in some embodiments of the present application;

[0046] FIG8 is a schematic structural diagram of another load-bearing beam provided in some embodiments of the present application;

[0047] FIG9 is a schematic cross-sectional structure diagram of a load-bearing beam and a mounting member provided in some embodiments of the present application.

[0048] The figure numbers in the specific implementation manner are as follows: 1. Vehicle; 2. Battery; 3. Controller; 4. Motor; 5. Battery case; 10. Battery cell; 20. Accommodation space; 30. Load-bearing beam; 31. Wall; 311. First cavity; 312. First wall; 313. Second wall; 32. Reinforcement; 321. Support portion; 322. Connecting portion; 323. Second cavity; 40. Box body; 41. Channel; 411. Wall; 50. Recessed portion; 60. Protruding portion; 70. Mounting part; X, first direction; Y, second direction; Z, extension direction. DETAILED DESCRIPTION

[0049] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0051] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0053] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0054] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0055] The term "plurality" used in this application refers to two or more (including two).

[0056] In this application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "vertical" also includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0057] In this application, battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, and the embodiments of this application are not limited thereto. Battery cells may be cylindrical, flat, rectangular, or in other shapes, and the embodiments of this application are not limited thereto.

[0058] The battery mentioned in the embodiments of the present application may include one or more battery cells to provide a single physical module with higher voltage and capacity. When there are multiple battery cells, the multiple battery cells are connected in series, in parallel or in hybrid through a busbar.

[0059] In some embodiments, the battery may be a battery module; when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0060] In some embodiments, the battery may be a battery pack, which includes a case and battery cells, wherein the battery cells or battery modules are housed in the case.

[0061] In some embodiments, the battery may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0062] With the development of new energy technology, batteries are used more and more widely, for example, in mobile phones, laptops, electric vehicles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and power tools.

[0063] As the primary energy-absorbing component of the battery housing, the load beam is crucial to the stable and reliable operation of the battery. Its collision resistance directly impacts battery reliability. Currently, load beams are typically formed in one piece using roll-forming. However, due to process limitations, the cross-section of the load beam is typically a square or square-shaped, resulting in poor collision resistance and, consequently, low battery reliability.

[0064] Based on the above considerations, the present application designs a battery case comprising a housing for accommodating battery cells and a load-bearing beam disposed along the periphery of the housing. The load-bearing beam comprises an independently formed wall and a reinforcement member. The wall is bent and arranged to enclose a first cavity. The reinforcement member is disposed within the first cavity and connected to the wall.

[0065] The reinforcements provide support for the walls, improving the overall impact resistance of the load beam. Furthermore, independently formed reinforcements can adopt more complex structures to further optimize their support for the walls and their ability to resist deformation, thereby further enhancing the overall impact resistance of the load beam. Thus, the above technical solution can effectively enhance the impact resistance of the load beam, thereby improving battery reliability.

[0066] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices using batteries.

[0067] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0068] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and electrical equipment described above, but can also be applied to all batteries including battery boxes and electrical equipment using batteries. However, for the sake of simplicity, the following embodiments are explained using electric vehicles as an example.

[0069] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0070] 1 , a battery 2 is provided inside the vehicle 1 , and the battery 2 may be provided at the bottom, head, or tail of the vehicle 1 . The battery 2 may be used to power the vehicle 1 , for example, the battery 2 may serve as an operating power source for the vehicle 1 .

[0071] The vehicle 1 may further include a controller 3 and a motor 4 . The controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, to meet the power requirements of the vehicle 1 during startup, navigation, and driving.

[0072] In some embodiments of the present application, the battery 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0073] Figure 2 is a schematic diagram of the partial structure of a battery provided in some embodiments of the present application, Figure 3 is a schematic diagram of the structure of a battery box provided in some embodiments of the present application, and Figure 4 is a schematic diagram of the structure of a load-bearing beam provided in some embodiments of the present application.

[0074] Continuing to refer to Figures 2 to 3, an embodiment of the present application provides a battery case 5, which includes a storage space 20 for accommodating a battery cell 10 and a load-bearing beam 30 arranged along the periphery of the storage space 20. The load-bearing beam 30 includes an independently formed wall body 31 and a reinforcement 32. The wall body 31 is bent integrally and encloses a first cavity 311. The reinforcement 32 is arranged in the first cavity 311 and connected to the wall body 31. In the cross section of the load-bearing beam 30 perpendicular to its own extension direction Z, both free ends of the wall body 31 are located in the first cavity 311. It should be noted that the extension direction Z of the load-bearing beam 30 refers to the length direction of the load-bearing beam 30.

[0075] For example, the battery case 5 is used to accommodate a battery cell 10, which can be one or more. If there are multiple battery cells 10, the multiple battery cells 10 can be connected in series, in parallel, or in a hybrid connection. Hybrid connection refers to multiple battery cells 10 being connected both in series and in parallel. Multiple battery cells 10 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 10 can be housed in the battery case 5. Of course, multiple battery cells 10 can also be first connected in series, in parallel, or in a hybrid connection to form a battery module, and then the multiple battery modules can be connected in series, in parallel, or in a hybrid connection to form a single unit and housed in the battery case 5.

[0076] The load-bearing beam 30 can be disposed on one side of the accommodation space 20, on opposite sides of the accommodation space 20, or even arranged around the perimeter of the accommodation space 20. The wall 31 can be a frame structure formed by rolling or bending the load-bearing beam 30, with the first cavity 311 located within the frame structure. The frame structure can be closed or have an opening. Optionally, the wall 31 can be made of, but is not limited to, steel, iron, copper, a copper alloy, aluminum, or an aluminum alloy.

[0077] The reinforcement member 32 can be detachably connected to the wall 31 or integrally provided on the wall 31. The reinforcement member 32 can be directly connected to the wall 31 or secured to the wall 31 by other components. As an example, the connection between the reinforcement member 32 and the wall 31 can be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0078] Optionally, the reinforcement 32 may be made of, but is not limited to, steel, iron, copper, copper alloy, aluminum, or aluminum alloy.

[0079] As an example, the reinforcement 32 and the wall 31 are made of the same material to simplify the manufacturing process and help reduce costs.

[0080] As another example, the reinforcement 32 and the wall 31 can be made of different materials to increase the flexibility of the load beam 30. For example, the reinforcement 32 can be made of a relatively rigid steel material, while the wall 31 can be made of a relatively lightweight aluminum material. The relatively rigid reinforcement 32 provides better support for the wall 31, while the relatively lightweight wall 31 helps reduce the overall weight of the load beam 30. This improves the load beam 30's collision resistance while also increasing the battery's energy density.

[0081] The load beam 30 is used to resist external impacts or collisions, thereby protecting the battery cells 10 within the battery case 5. The first cavity 311 within the load beam 30 provides an energy-absorbing space for the load beam 30. This, on the one hand, reduces deformation of the load beam 30 caused by external forces; on the other hand, it reduces the overall weight of the load beam 30, which helps to increase the energy density of the battery.

[0082] For example, the reinforcement 32 can be formed into various structures through rolling or bending processes to provide different support effects for the wall 31. For example, the reinforcement 32 can be, but is not limited to, a single-layer plate structure, a multi-layer plate structure, or a tubular structure, etc., and can be selected according to the actual application environment.

[0083] Optionally, the number of the reinforcement members 32 may be one or more. As an example, when the number of the reinforcement members 32 is plural, the plurality of reinforcement members 32 are arranged at intervals.

[0084] The reinforcement 32 can support the wall 31 to improve the overall anti-collision performance of the load-bearing beam 30. In addition, the independently formed reinforcement 32 can adopt a more complex structure to further optimize its support effect and anti-deformation ability on the wall 31, so that the overall anti-collision performance of the load-bearing beam 30 can be further improved. In this way, the above technical solution can effectively enhance the anti-collision performance of the load-bearing beam 30 to improve the reliability of the battery. In addition, the two free ends of the wall 31 are both located in the first cavity 311, which can not only reduce the risk of damage to the free end connection by the external environment to improve the connection reliability of the two free ends of the wall 31, but also reduce the space occupancy rate of the load-bearing beam 30, which is beneficial to improve the energy density of the battery 2.

[0085] In some embodiments, the wall is formed by roller bending. The roller bending process has the advantages of high material utilization, good quality consistency, superior structural performance and good surface quality.

[0086] In some embodiments, the wall 31 includes a first wall 312 and a second wall 313 arranged along the first direction X. The first wall 312 is located on a side of the second wall 313 close to the receiving space 20. The reinforcement 32 includes a support portion 321 connecting the first wall 312 and the second wall 313.

[0087] Exemplarily, the load-bearing beam 30 is arranged on at least one of the two sides of the accommodating space 20 along the first direction X. In other words, the number of the load-bearing beam 30 is one, and one load-bearing beam 30 is arranged on one side of the accommodating space 20 along the first direction X; or, the number of the load-bearing beam 30 is two, and the two load-bearing beams 30 are respectively arranged on both sides of the accommodating space 20 along the first direction X.

[0088] According to the above technical solution, when the battery box 5 is subjected to external impact or collision, the load-bearing beam 30 needs to withstand a large force along the first direction X. The support portion 321 is connected between the first wall 312 and the second wall 313, and can form a strong support for the first wall 312 and the second wall 313, thereby improving the deformation resistance of the load-bearing beam 30 along the first direction X, thereby further improving the anti-collision performance of the load-bearing beam 30.

[0089] In some embodiments, the reinforcement member 32 further includes two connecting portions 322 , which are respectively connected to two ends of the support portion 321 along the first direction X and extend along the second direction Y. The first direction X intersects the second direction Y. One of the two connecting portions 322 is in contact with and connected to the first wall 312 , and the other of the two connecting portions 322 is in contact with and connected to the second wall 313 .

[0090] For example, the connection portion 322 may be directly connected to the support portion 321, or may be restricted to the support portion 321 by other components. As an example, the connection between the connection portion 322 and the support portion 321 may be, but is not limited to, bolt connection, welding, riveting, clamping, or bonding.

[0091] Optionally, the connecting portion 322 and the supporting portion 321 are integrally formed. This eliminates the need for an additional joining process to connect the connecting portion 322 and the supporting portion 321, simplifying the manufacturing process. Furthermore, compared to connecting the connecting portion 322 and the supporting portion 321 through an additional joining process, the integral structure provides a stronger connection between the connecting portion 322 and the supporting portion 321.

[0092] The connecting portion 322 may be directly connected to the first wall 312 or may be secured to the first wall 312 via other components. For example, the connecting portion 322 and the first wall 312 may be connected by, but is not limited to, bolting, welding, riveting, clamping, or bonding. For details on the connection between the connecting portion 322 and the second wall 313, refer to the connection between the connecting portion 322 and the first wall 312 described above and will not be further described here.

[0093] The two connecting portions 322 extend from the two ends of the support portion 321 along the first direction X and are arranged along the second direction Y. The extension direction Z of the two connecting portions 322 intersects the extension direction Z of the support portion 321, thereby forming a three-dimensional support structure. This structural design not only enhances the structural stability of the reinforcement 32 itself, but also increases the contact area between the reinforcement 32 and the wall 31, thereby significantly improving the connection strength between the reinforcement 32 and the wall 31, further enhancing the collision resistance of the load-bearing beam 30.

[0094] FIG5 is a schematic structural diagram of another load-bearing beam provided in some embodiments of the present application.

[0095] 5 , in some embodiments, there are multiple support portions 321 , and the multiple support portions 321 are spaced apart along the second direction Y, where the first direction X intersects with the second direction Y.

[0096] For example, the number of support portions 321 may be, but is not limited to, two, three, or more. The first direction X may be understood as the width direction of the load-bearing beam 30, and the second direction Y may be understood as the height direction of the load-bearing beam 30. Optionally, the second direction Y is perpendicular to the first direction X.

[0097] The above technical solution sets up multiple support parts 321, and the multiple support parts 321 can form support for different positions of the wall body 31 along the second direction Y, which can further improve the supporting effect of the reinforcement 32 on the wall body 31, thereby further improving the anti-collision performance of the load-bearing beam 30.

[0098] In some embodiments, the reinforcement member 32 further includes a plurality of connecting portions 322 , and the plurality of connecting portions 322 and the plurality of supporting portions 321 are alternately connected along the second direction Y. Of two adjacent connecting portions 322 , one connecting portion 322 is aligned with and connected to the first wall 312 , and the other connecting portion 322 is aligned with and connected to the second wall 313 .

[0099] Exemplarily, two adjacent connecting portions 322 are connected to the two ends of the same support portion 321. One connecting portion 322 can connect two adjacent support portions 321, so that multiple support portions 321 form a whole. A part of the external force applied to a certain support portion 321 can be transmitted to other support portions 321 through the connecting portion 322, so as to improve the overall force uniformity of the reinforcement 32 and reduce the risk of damage to the reinforcement 32 due to local excessive force.

[0100] In this way, the above technical solution can not only improve the supporting effect of the reinforcement 32 on the wall 31 , but also improve the reliability of the reinforcement 32 .

[0101] FIG6 is a schematic structural diagram of another load-bearing beam provided in some embodiments of the present application, and FIG7 is a schematic structural diagram of another load-bearing beam provided in some embodiments of the present application.

[0102] 6 and 7 , in some embodiments, the reinforcement member 32 encloses a second cavity 323 .

[0103] Exemplarily, the second cavity 323 enclosed by the reinforcement member 32 can provide an energy-absorbing space to reduce deformation of the reinforcement member 32 caused by an external force.

[0104] Optionally, the cross-sectional shape of the second cavity 323 along the extension direction Z of the load-bearing beam 30 may be, but is not limited to, a circle, a rectangle, a trapezoid, a parallelogram, an oblong, an ellipse, or the like.

[0105] The above technical solution can further reduce the deformation of the load-bearing beam 30 when the load-bearing beam 30 is subjected to external impact or collision through the dual energy absorption effect of the second cavity 323 and the first cavity 311, thereby further improving the anti-collision performance of the load-bearing beam 30.

[0106] In some embodiments, the stiffness of the reinforcement 32 is greater than the stiffness of the wall 31 .

[0107] For example, stiffness is a physical quantity used to describe the ability of a structure to resist deformation under external force. The stiffness of the reinforcement 32 is greater than the stiffness of the wall 31, that is, the ability of the reinforcement 32 to resist deformation under external force is greater than the ability of the wall 31 to resist deformation under external force.

[0108] The stiffness of the reinforcement 32 and the wall 31 can be measured by static loading method, dynamic testing method or finite element analysis. As an example, in the static loading method, a known static load is applied to the test sample, and then the displacement or deformation of the sample is measured. Specifically, the load is first gradually applied to the test structure, and then the corresponding displacement or deformation is measured, and finally the stiffness is calculated using the formula K=F / S, where K is the stiffness, F is the force applied to the test structure, and S is the displacement of the test structure under the action of the force applied to the test structure. The specific steps of the dynamic testing method and finite element analysis can be carried out with reference to the methods in the existing technical literature and will not be repeated here.

[0109] When the battery case 5 is subjected to an external impact or collision, the relatively high rigidity of the reinforcement 32 reduces the deformation of the reinforcement 32 under the force of the external impact or collision, providing strong support for the wall 31 and reducing the deformation of the load beam 30 in the direction toward the accommodation space 20 due to the external impact or collision. This reduces the risk of damage to the battery cells 10 located therein due to the deformation of the load beam 30 invading the accommodation space 20. Furthermore, the relatively low rigidity of the wall 31 causes the wall 31 to deform significantly under the force of the external impact or collision. This, combined with the energy absorption function of the first cavity 311, reduces the frequency and amplitude of vibration of the load beam 30 as a whole due to the external impact or collision, thereby reducing the risk of damage to sensitive electrical components within the battery case 5 caused by high-frequency vibration.

[0110] The stiffness of the reinforcement 32 and the wall 31 can be set in a variety of ways so that the stiffness of the reinforcement 32 is greater than the stiffness of the wall 31, including but not limited to preparing the reinforcement 32 and the wall 31 with different materials or preparing the reinforcement 32 and the wall 31 with different thicknesses.

[0111] In one example, the reinforcement 32 and the wall 31 can be made of different materials. The reinforcement 32 is made of a material with greater rigidity, while the wall 31 is made of a material with less rigidity, so that the rigidity of the reinforcement 32 is greater than that of the wall 31. For example, the reinforcement 32 can be made of steel, and the wall 31 can be made of aluminum or an aluminum alloy.

[0112] In another example, the reinforcement 32 and the wall 31 may be prepared to have different thicknesses, wherein the thickness of the reinforcement 32 is greater and the thickness of the wall 31 is smaller, so that the rigidity of the reinforcement 32 is greater than the rigidity of the wall 31 .

[0113] The above technical solution effectively reduces the damage to the battery cells 10 and related electrical components inside the battery box 5 caused by external impact or collision by combining the strong supporting effect of the reinforcement 32 with the moderate deformation of the wall 31, and can significantly improve the reliability of the battery.

[0114] In some embodiments, the thickness of the reinforcement 32 is greater than the thickness of the wall 31 .

[0115] For example, when the battery case 5 is subjected to an external impact or collision, the relatively large thickness and correspondingly high rigidity of the reinforcement member 32 result in less deformation of the reinforcement member 32 under the force of the external impact or collision, providing strong support for the wall 31 and reducing the deformation of the load beam 30 in the direction approaching the accommodation space 20 under the external impact or collision. This reduces the risk of damage to the battery cells 10 located within the accommodation space 20 caused by the deformation of the load beam 30 invading the accommodation space 20. Furthermore, because the wall 31 is relatively small in thickness and correspondingly low in rigidity, the wall 31 undergoes greater deformation under the force of the external impact or collision. This, combined with the energy-absorbing effect of the first cavity 311, reduces the frequency and amplitude of vibration of the entire load beam 30 under external impact or collision, thereby reducing the risk of damage to sensitive electrical components within the battery case 5 caused by high-frequency vibration.

[0116] The above technical solution combines the strong supporting effect of the reinforcement 32 with the moderate deformation of the wall 31 by adjusting the thickness. The process is simple and helps to reduce costs.

[0117] Continuing with Figures 2 and 3, in some embodiments, the battery box 5 also includes a box body 40, the accommodating space 20 is arranged in the box body 40, the box body 40 includes a groove 41 arranged along the periphery of the accommodating space 20, and the load-bearing beam 30 is inserted into the groove 41.

[0118] For example, the box body 40 is primarily used to store and protect the battery cells 10, while also providing structural support for the battery cells 10. The box body 40 may be made of, but is not limited to, metal or non-metal materials. For example, metal materials may include copper, aluminum, or stainless steel; non-metal materials may include polyethylene, polypropylene, polyvinyl chloride, or wood.

[0119] The load beam 30 is connected to the box body 40, and at least a portion of the load beam 30 is inserted into the groove 41. The load beam 30 can be partially inserted into the groove 41 and connected to the box body 40, or the load beam 30 can be fully inserted into the groove 41 and connected to the box body 40.

[0120] The load beam 30 can be detachably connected to the box body 40 or integrally provided on the box body 40. The load beam 30 can be directly connected to the box body 40 or secured to the box body 40 via other components. For example, the connection between the load beam 30 and the box body 40 can be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0121] On the one hand, the groove 41 of the above technical solution can play a certain positioning role during the assembly process of the load-bearing beam 30 and the box body 40 to facilitate the installation of the load-bearing beam 30; on the other hand, it can increase the contact area between the load-bearing beam 30 and the box body 40 to improve the connection firmness between the load-bearing beam 30 and the box body 40.

[0122] In some embodiments, the groove 41 is arranged on at least one side of the accommodating space 20 along the first direction X, and the groove 41 includes two wall portions 411 opposite to each other along the second direction Y. The walls 31 located at both ends of the load-bearing beam 30 along the second direction Y are respectively connected to the two wall portions 411, and the first direction X intersects with the second direction Y.

[0123] Exemplarily, the main function of the wall portion 411 is to form the groove 41 and provide stable support and fixation for the load-bearing beam 30. The wall bodies 31 located at both ends of the load-bearing beam 30 along the second direction Y are respectively connected to the two wall portions 411 to form connection points at both ends of the load-bearing beam 30 along the second direction Y. When the load-bearing beam 30 is subjected to external impact or collision, the connection points located at both ends of the load-bearing beam 30 along the second direction Y can simultaneously bear the external forces acting on the load-bearing beam 30, thereby optimizing the force uniformity at the connection between the load-bearing beam 30 and the box body 40 and improving the stability of the load-bearing beam 30. In addition, the two wall portions 411 of the groove 41 that are opposite to each other along the second direction Y can form a limit for the load-bearing beam 30 along the second direction Y, thereby further improving the stability of the load-bearing beam 30.

[0124] Optionally, the connection between the wall 31 of the load-bearing beam 30 and the wall portion 411 of the channel 41 may be, but is not limited to, bolt connection, welding, riveting, clamping or bonding.

[0125] In this way, the above technical solution can significantly improve the stability of the load-bearing beam 30 .

[0126] FIG8 is a schematic structural diagram of another load-bearing beam provided in some embodiments of the present application.

[0127] Continuing to refer to Figure 8, in some embodiments, the wall body 31 is provided with a recess 50 on the side facing away from the first cavity 311 along the first direction X, and the wall body 31 is provided with a protrusion 60 on the side facing the first cavity 311 along the first direction X, and the position of the protrusion 60 corresponds to the position of the recess 50.

[0128] For example, a recessed area may be formed locally on the wall 31 by adopting a bending process, and the recessed area may be manifested as a recessed portion 50 on the side of the wall 31 facing away from the first cavity 311 along the first direction X, and as a convex portion 60 on the side of the wall 31 facing the first cavity 311 along the first direction X.

[0129] The above technical solution, on the one hand, can further improve the structural strength of the wall body 31 itself through the cooperation of the recess 50 and the protrusion 60, thereby further improving the anti-collision performance of the load-bearing beam 30; on the other hand, the recess 50 can form a certain accommodating space 20 on the side of the wall body 31 facing away from the first cavity 311, and the protrusion 60 is located in the first cavity 311, thereby reducing the space occupancy rate of the load-bearing beam 30, which is beneficial to improving the energy density of the battery.

[0130] In some embodiments, there are multiple recesses 50 , and the multiple recesses 50 are spaced apart along the second direction Y, where the second direction Y intersects the first direction X.

[0131] For example, each recess 50 may extend along the extension direction Z of the load beam 30 , and the number of recesses 50 may be but is not limited to two, three or more. The first direction X, the second direction Y and the extension direction Z of the load beam 30 are perpendicular to each other.

[0132] The above technical solution can further improve the structural strength of the wall 31 itself, reduce the risk of cracking of the wall 31 due to excessive local force, and further reduce the space occupancy rate of the load-bearing beam 30.

[0133] FIG9 is a schematic cross-sectional structure diagram of another type of cooperation between a load-bearing beam and a mounting member provided in some embodiments of the present application.

[0134] Continuing to refer to FIG. 9 in combination with FIG. 2 and FIG. 3 , in some embodiments, the battery box 5 further includes a mounting member 70 , which connects the wall 31 and the reinforcement member 32 .

[0135] Illustratively, the portion where the reinforcement 32 and the wall 31 abut against each other forms a connection area, to which the mounting member 70 is connected. The mounting member 70 may be detachably connected to the wall 31 or integrally mounted on the wall 31. The mounting member 70 may be directly connected to the wall 31 or secured to the wall 31 by other components. For example, the mounting member 70 may be connected to the wall 31 by, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0136] As an example, when the mounting component 70 and the wall body 31 are connected by bolts, the bolts pass through the connection area to fix the mounting component 70 on the wall body 31 .

[0137] Optionally, the mounting component 70 may be, but is not limited to, a connector, a socket (such as an electrical socket or an insulation protection socket), an interface (such as a cooling system interface, a data transmission interface or a fault diagnosis port) or a modular mounting point, etc.

[0138] The connection area formed by the wall 31 and the reinforcement 32 has high structural strength. By connecting the mounting member 70 to the wall 31 and the reinforcement 32, the stability of the mounting member 70 can be effectively improved. Furthermore, after the mounting member 70 is connected to the connection area formed by the wall 31 and the reinforcement 32, the overall thickness at this location can be further increased. That is, the combined thickness of the mounting member 70, the reinforcement 32, and the wall 31 can be added together, further improving the deformation resistance of the load-bearing beam at this location.

[0139] In this way, the above technical solution can not only effectively improve the stability of the mounting member 70 , but also further improve the local anti-collision performance of the load-bearing beam 30 .

[0140] According to some embodiments of the present application, the present application further provides a battery, comprising a plurality of battery cells 10 and a battery case 5 of any of the above solutions, wherein the plurality of battery cells 10 are accommodated in an accommodating space 20 .

[0141] According to some embodiments of the present application, the present application further provides an electrical device, comprising a battery according to any of the above schemes, wherein the battery is used to provide electrical energy.

[0142] Continuing with FIG. 1 and FIG. 2 , in some embodiments, the electrical device is a vehicle 1 , the vehicle 1 includes a chassis, and the load-bearing beam 30 is connected to the chassis.

[0143] For example, the load beam 30 can be detachably connected to the chassis or fixedly mounted on the chassis. The load beam 30 can be directly connected to the chassis or secured to the chassis via other components. For example, the connection between the load beam 30 and the chassis can be, but is not limited to, bolting, welding, riveting, clamping, or bonding.

[0144] As an example, the load-bearing beam 30 is detachably connected to the chassis to facilitate replacement of the battery 2. Specifically, in the vehicle's battery replacement solution, the battery 2 of the vehicle 1 is not charged by plugging in, but the battery 2 is quickly replaced at a battery replacement station to restore the battery life. Therefore, the load-bearing beam 30 of the battery box 5 is detachably connected to the chassis, which means that the entire battery 2 (including the battery box 5, the load-bearing beam 30 and other related structures) can be quickly removed and replaced from the chassis of the vehicle 1. This design can make the battery replacement process faster and more convenient, can reduce the time and labor required for battery replacement, and makes battery replacement as a method of supplementing vehicle battery life more feasible and convenient.

[0145] In order to better understand the battery box 5 provided in the embodiment of the present application, based on the same inventive concept, an embodiment of the above-mentioned battery module in actual application is provided here for illustration.

[0146] An embodiment of the present application provides a battery case 5, which includes a case body 40 and a load-bearing beam 30. The case body 40 includes a receiving space 20 for receiving a battery cell 10. The load-bearing beam 30 is arranged along the outer periphery of the receiving space 20. The load-bearing beam 30 includes an independently formed wall body 31 and a reinforcement 32. The wall body 31 is bent and encloses a first cavity 311. The reinforcement 32 is arranged in the first cavity 311 and connected to the wall body 31. The thickness of the reinforcement 32 is greater than the thickness of the wall body 31.

[0147] The reinforcement 32 supports the wall 31, thereby improving the overall impact resistance of the load beam 30. Furthermore, the independently formed reinforcement 32 can adopt a more complex structure to further optimize its support for the wall 31 and its ability to resist deformation, thereby further improving the overall impact resistance of the load beam 30. Thus, the above technical solution can effectively enhance the impact resistance of the load beam 30, thereby improving the reliability of the battery.

[0148] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery box, comprising a storage space for accommodating a battery cell and a load-bearing beam arranged along the periphery of the storage space; The load-bearing beam includes an independently formed wall body and a reinforcement member, wherein the wall body is integrally bent and arranged to enclose a first cavity, and the reinforcement member is arranged in the first cavity and connected to the wall body; in, In a cross section of the load-bearing beam perpendicular to its own extension direction, both free ends of the wall body are located in the first cavity.

2. The battery case according to claim 1, wherein: The wall body is formed by roller bending.

3. The battery case according to claim 1 or 2, wherein: The wall body includes a first wall and a second wall arranged along a first direction, wherein the first wall is located on a side of the second wall close to the accommodation space; The reinforcement member includes a support portion connecting the first wall and the second wall.

4. The battery case according to claim 3, wherein: The reinforcement member further includes two connecting portions, the two connecting portions being respectively connected to two ends of the support portion along the first direction and extending along a second direction, wherein the first direction intersects the second direction; One of the two connecting portions is attached to and connected to the first wall, and the other of the two connecting portions is attached to and connected to the second wall.

5. The battery case according to claim 3, wherein: There are multiple supporting parts, and the multiple supporting parts are arranged at intervals along the second direction. The first direction intersects with the second direction.

6. The battery case according to claim 5, wherein: The reinforcement member further includes a plurality of connecting portions, wherein the plurality of connecting portions and the plurality of supporting portions are alternately connected along the second direction; Of the two adjacent connection parts, one connection part is attached to and connected to the first wall, and the other connection part is attached to and connected to the second wall.

7. The battery case according to any one of claims 1 to 6, wherein: The stiffness of the reinforcement is greater than the stiffness of the wall.

8. The battery case according to any one of claims 1 to 7, wherein: The thickness of the reinforcement is greater than the thickness of the wall.

9. The battery case according to any one of claims 1 to 8, wherein: The battery box further includes a box body, the accommodating space is provided in the box body, the box body includes a groove provided along the periphery of the accommodating space, and the load-bearing beam is inserted into the groove.

10. The battery case according to claim 9, wherein: The groove is arranged on at least one side of the accommodating space along the first direction, and the groove includes two wall portions opposite to each other along the second direction. The wall bodies located at both ends of the load-bearing beam along the second direction are respectively connected to the two wall portions, and the first direction intersects with the second direction.

11. The battery case according to any one of claims 1 to 10, wherein: The wall body is provided with a concave portion on a side facing away from the first cavity along the first direction, and a convex portion on a side facing the first cavity along the first direction, wherein the position of the convex portion corresponds to the position of the concave portion.

12. The battery case according to claim 11, wherein: There are multiple recesses, and the multiple recesses are arranged at intervals along a second direction, and the second direction intersects with the first direction.

13. The battery case according to any one of claims 1 to 12, wherein: The battery box further includes a mounting member, which connects the wall and the reinforcement member.

14. A battery comprising: The battery box according to any one of claims 1 to 13; A plurality of battery cells are accommodated in the accommodation space.

15. An electrical device comprising the battery according to claim 14, wherein the battery is used to provide electrical energy.

16. The electrical device according to claim 15, wherein: The electrical device is a vehicle, the vehicle includes a chassis, and the load-bearing beam is connected to the chassis.

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