Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a box body and a battery monomer, the box body comprises a shell and a limiting beam, the shell is provided with an accommodating space, and the limiting beam is arranged in the accommodating space and is connected to the shell. The limiting beam comprises a beam body and a reinforcing part, the beam body comprises a first wall, a second wall and a first cavity, the first wall and the second wall are located on the two sides of the first cavity in the first direction respectively, and the reinforcing part is arranged in the first cavity. The reinforcing part comprises a first rib and a plurality of second ribs, the second ribs are connected between the first wall and the second wall, the second ribs are arranged at intervals in the second direction, the first rib is connected with the second ribs, and the first direction intersects with the second direction. The battery monomers are arranged in the accommodating space and are arranged along the first direction with the limiting beam; according to the invention, the reliability of the battery device can be effectively improved.

Description

Technical Field

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

[0002] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0003] In the development of battery technology, improving the reliability of battery devices is an ongoing research direction. Utility Model Content

[0004] In view of the above problems, this application provides a battery device and an electrical device that can effectively improve the reliability of the battery device.

[0005] In a first aspect, embodiments of this application provide a battery device, which includes a housing and battery cells. The housing includes a shell and a limiting beam. The shell has an accommodating space, and the limiting beam is disposed within the accommodating space and connected to the shell. The limiting beam includes a beam body and a reinforcing member. The beam body includes a first wall, a second wall, and a first cavity. The first wall and the second wall are respectively located on both sides of the first cavity along a first direction. The reinforcing member is disposed within the first cavity. The reinforcing member includes a first rib and a plurality of second ribs. Each second rib is connected between the first wall and the second wall, and the plurality of second ribs are spaced apart along a second direction. The first rib connects to the plurality of second ribs, and the first direction intersects the second direction. The battery cells are disposed within the accommodating space and are arranged along the first direction with the limiting beam.

[0006] The reinforcement in the above-mentioned technical solution can improve the bending resistance of the beam. When the limiting beam is subjected to the expansion force of the battery cells or external mechanical loads, the multiple second ribs can form multi-point support between the first and second walls, effectively resisting the deformation of the beam and improving the overall structural stability of the limiting beam. Furthermore, the first rib connects to multiple second ribs, enabling the stress on the multiple second ribs to be transmitted. This allows the multiple second ribs to form a coordinated force-bearing path under the unified connection of the first rib, improving the overall stress uniformity of the reinforcement and reducing the risk of local stress concentration, thereby improving the overall structural stability of the limiting beam and ultimately enhancing the reliability of the battery device.

[0007] In some embodiments of the first aspect, the reinforcement further includes a filler that fills between any two adjacent second ribs.

[0008] The filler can play a role in strengthening the support. When the limiting beam is subjected to the expansion force of the battery cell or external mechanical load, the compressive stress is no longer concentrated at the support node formed between the first and second walls by the second rib. Instead, it is borne and diffused by the filler, thereby significantly improving the deformation resistance and stress uniformity of the limiting beam.

[0009] In some embodiments of the first aspect, the elastic modulus of the filler is less than the elastic modulus of the second rib.

[0010] The above-mentioned technical solution can form a rigid-flexible coupling connection structure between the filler and the second rib, which not only helps with stress coordination and impact absorption, but also significantly improves the deformation adaptability of the entire limiting beam and reduces the risk of fatigue cracking of the limiting beam.

[0011] In some embodiments of the first aspect, one end of the beam has an opening along a second direction, the opening communicating with the first cavity and the external environment. The reinforcement is configured to be movable along the second direction to enter or exit the first cavity through the opening.

[0012] By providing an opening at one end of the beam along the second direction, and enabling the reinforcing member to move along the second direction to enter or exit the first cavity through the opening, this structure not only simplifies the processing technology of the limiting beam, but also achieves modularization, maintainability and efficient assembly of the limiting beam structure.

[0013] In some embodiments of the first aspect, a first insertion portion is provided on the beam body, the first insertion portion being located within a first cavity and extending along a second direction. A second insertion portion corresponding to the first insertion portion is provided on the reinforcing member, the first insertion portion being used for insertion and engagement with the second insertion portion.

[0014] The above technical solution, by introducing the insertion and cooperation of the first insertion part and the second insertion part, can play a positioning and guiding role in the assembly process of the reinforcement and the beam, so as to improve the assembly efficiency of the limiting beam.

[0015] In some embodiments of the first aspect, the beam further includes a third wall and a fourth wall, which are located on opposite sides of the first cavity along a third direction, with the first direction, the second direction, and the third direction being perpendicular to each other. The third wall connects to the first wall and the second wall, the fourth wall connects to the first wall and the second wall, and the first rib connects between the third wall and the fourth wall.

[0016] By connecting the first rib to the third and fourth walls, the structural stability of the first rib itself can be improved, and the entire limiting beam can form a more balanced three-dimensional support structure, which significantly improves the structural stability of the limiting beam under complex loads and further improves the overall reliability of the battery device.

[0017] In some embodiments of the first aspect, the second rib is connected between the third wall and the fourth wall.

[0018] This can further extend the supporting role of the second stiffener in the third direction, enhance the deformation resistance of the limiting beam in the third direction, and further improve the overall structural stability of the limiting beam.

[0019] In some embodiments of the first aspect, the housing includes a base plate, battery cells are supported on the base plate, and beams are connected to the base plate.

[0020] By connecting the limiting beam to the base plate to form an integrated structure, the overall mechanical performance stability of the limiting beam can be improved.

[0021] In some embodiments of the first aspect, the beam further includes a fifth wall located on one side of the first cavity along the second direction, the fifth wall connecting the first wall and the second wall, and the fifth wall being fitted and connected to the base plate.

[0022] The close-fitting design of the fifth wall and the bottom plate helps to increase the overall thickness of the bottom of the box, thereby improving the battery device's resistance to bottom ball impacts.

[0023] In some embodiments of the first aspect, the housing further includes a mounting portion comprising a first plate, a second plate, and a second cavity. Both the first and second plates are connected to a base plate, and are located on opposite sides of the second cavity along a first direction. At least a portion of the beam is disposed within the second cavity. A first wall is fitted to the first plate, and a second wall is fitted to the second plate.

[0024] On the one hand, the aforementioned structure can increase the contact area between the limiting beam and the shell, thereby improving the structural stability of the limiting beam. On the other hand, the first and second plates can also play a positioning role during the assembly process of the limiting beam, improving assembly efficiency. In addition, the first and second plates can effectively limit the displacement of the limiting beam along the first direction and can bear part of the stress for the limiting beam, thereby effectively improving the load-bearing capacity of the limiting beam.

[0025] In some embodiments of the first aspect, the housing includes a support member and an outer frame. The support member includes a fiber composite base plate, and a receiving space is located above the fiber composite base plate, on which the battery cells are supported. The outer frame is a non-metallic structural component, and the fiber composite base plate is connected to the outer frame, which supports the support member.

[0026] The housing of the above-described technical solution includes interconnected support members and an outer frame. The fiber composite base plate of the support members is used to support the battery cells. The outer frame is a non-metallic structural component. The outer frame is used to support the support members. The housing can be installed on an electrical device, such as the bottom of a vehicle, via the outer frame. The fiber composite base plate itself has relatively high impact resistance, which helps to improve the impact resistance of the bottom of the housing. The frame itself has good structural strength, which can provide protection for the battery cells. At the same time, the fiber composite base plate and the outer frame are relatively lightweight, which is conducive to achieving a lightweight design for the housing. Therefore, the housing of the embodiment of this application can take into account both bottom structural strength and overall lightweight design, which is beneficial to balancing the reliability and energy density of the battery device.

[0027] Secondly, this application provides an electrical device that includes a battery device provided in any embodiment of the first aspect, the battery device being used to store or provide electrical energy.

[0028] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0030] Figure 1 These are schematic diagrams of the vehicle structure provided in some embodiments of this application;

[0031] Figure 2 This is an exploded structural diagram of a battery device provided in some embodiments of this application;

[0032] Figure 3 This is a top view of the housing of a battery device provided in some embodiments of this application;

[0033] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along AA;

[0034] Figure 5 A schematic cross-sectional view of a limiting beam for a battery device provided in some embodiments of this application;

[0035] Figure 6 for Figure 5 A schematic diagram of the partial split structure shown;

[0036] Figure 7 A three-dimensional structural schematic diagram of a limiting beam for a battery device provided in some embodiments of this application;

[0037] Figure 8 A cross-sectional structural schematic diagram of the limiting beam of another battery device provided in some embodiments of this application;

[0038] Figure 9 for Figure 3 A magnified schematic diagram of the local structure at point H;

[0039] Figure 10 for Figure 9 A schematic diagram of the partial split structure shown;

[0040] Figure 11 A top view of the beam body of a limiting beam for a battery device provided in some embodiments of this application;

[0041] Figure 12 This is a cross-sectional structural diagram of the matching between the limiting beam and the base plate of a battery device provided in some embodiments of this application;

[0042] Figure 13 This is a cross-sectional structural diagram showing the cooperation between the limiting beam and the base plate of another battery device provided in some embodiments of this application;

[0043] Figure 14 for Figure 13 A schematic diagram of the partial split structure shown;

[0044] Figure 15 This is a top view of the housing of a battery device provided in some embodiments of this application;

[0045] Figure 16 for Figure 15 Schematic diagram of the cross-sectional structure along BB;

[0046] Figure 17 This is a three-dimensional structural diagram of a support member for a battery device provided in some embodiments of this application.

[0047] The reference numerals in the detailed embodiments are as follows:

[0048] 1. Vehicle; 2. Battery unit; 3. Controller; 4. Motor;

[0049] 10. Box body; 11. Shell; 111. Accommodation space; 112. Mounting part; 1121. First plate; 1122. Second plate; 1123. Second cavity; 113. Bottom plate; 12. Limiting beam;

[0050] 121. Beam; 1211. First wall; 1212. Second wall; 1213. First cavity; 1214. Opening; 1215. Third wall; 1216. Fourth wall; 1217. Fifth wall;

[0051] 122. Reinforcing member; 1221. First rib; 1222. Second rib; 1223. Filler;

[0052] 123. First connector; 124. Second connector;

[0053] 100. Supporting component; 101. Fiber composite base plate; 102. Fiber composite side plate; 103. Fiber composite flange; 104. Side opening; 110. Outer frame;

[0054] 20. Battery cell;

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

[0056] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application 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 drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0058] In this application, the reference to "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 in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0059] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0060] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0061] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0062] In this application, "multiple" means two or more (including two).

[0063] In this application, the term "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering.

[0064] With the development of new energy technologies, batteries are being used more and more widely, for example in mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools.

[0065] In the development of battery technology, improving the reliability of battery devices is an ongoing research direction.

[0066] A battery pack consists of a housing and individual battery cells. The housing typically includes a limiting beam, which is mainly used to absorb the expansion and deformation of the individual battery cells, buffer structural stress, and maintain the stability of the battery pack.

[0067] In related technologies, the limiting beam in the battery device has limited bending resistance. When the battery cell expands significantly or the limiting beam is subjected to external mechanical load, the limiting beam may undergo permanent deformation or breakage, leading to structural instability and affecting the overall reliability of the battery device.

[0068] Based on the above considerations, this application designs a battery device, which includes a housing and individual battery cells. The housing includes a shell and a limiting beam. The shell has an accommodating space, and the limiting beam is disposed within the accommodating space and connected to the shell. The limiting beam includes a beam body and a reinforcing member. The beam body includes a first wall, a second wall, and a first cavity. The first wall and the second wall are located on opposite sides of the first cavity along a first direction, and the reinforcing member is disposed within the first cavity. The reinforcing member includes a first rib and multiple second ribs. Each second rib connects between the first wall and the second wall, and the multiple second ribs are spaced apart along a second direction. The first rib connects to the multiple second ribs, and the first direction intersects the second direction. The individual battery cells are disposed within the accommodating space and are arranged along the first direction with the limiting beam.

[0069] The reinforcement in the above technical solution can improve the bending resistance of the beam. When the limiting beam is subjected to the expansion force of the battery cell or external mechanical load, multiple second ribs can form multi-point support between the first wall and the second wall, which can effectively resist the deformation of the beam and improve the overall structural stability of the beam.

[0070] Furthermore, the first rib connects to multiple second ribs, which can transmit the stress on the multiple second ribs. This allows the multiple second ribs to form a coordinated force path under the unified connection of the first rib, improving the overall stress uniformity of the reinforcing member, reducing the risk of local stress concentration, and thus improving the overall structural stability of the limiting beam, thereby improving the reliability of the battery device.

[0071] The battery cells described in this application are applicable to battery devices and electrical equipment using battery devices. Electrical equipment can be devices that use battery devices as a power source or various energy storage systems that use battery devices as energy storage elements. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0072] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0073] Figure 1 The diagram shows the structural features of a vehicle provided in some embodiments of this application.

[0074] like Figure 1 As shown, a battery device 2 is installed inside the vehicle 1. The battery device 2 can be located at the bottom, front, or rear of the vehicle 1. The battery device 2 can be used to power the vehicle 1; for example, the battery device 2 can serve as the operating power source for the vehicle 1.

[0075] The vehicle 1 may also include a controller 3 and a motor 4. The controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power needs of the vehicle 1 during starting, navigation and driving.

[0076] In some embodiments of this application, the battery device 2 can not only serve as the operating power source for the vehicle 1, but also as the driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0077] In some embodiments, the battery device 2 may be an energy storage device.

[0078] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, energy storage devices can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours.

[0079] In some embodiments, the energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0080] Figure 2 This is an exploded structural diagram of a battery device provided in some embodiments of this application. Figure 3 This is a top view of the casing of a battery device provided in some embodiments of this application. Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure along AA. Figure 5 This is a cross-sectional structural schematic diagram of a limiting beam for a battery device provided in some embodiments of this application. Figure 6 for Figure 5 The diagram shows a partial split structure. Figure 7 This is a three-dimensional structural diagram of a limiting beam for a battery device provided in some embodiments of this application.

[0081] Continue to refer Figures 2 to 7This application provides a battery device, which includes a housing 10 and a battery cell 20. The housing 10 includes a shell 11 and a limiting beam 12. The shell 11 has an accommodating space 111. The limiting beam 12 is disposed within the accommodating space 111 and connected to the shell 11. The limiting beam 12 includes a beam body 121 and a reinforcing member 122. The beam body 121 includes a first wall 1211, a second wall 1212, and a first cavity 1213. The first wall 1211 and the second wall 1212 are respectively located on both sides of the first cavity 1213 along a first direction X. The reinforcing member 122 is disposed within the first cavity 1213. The reinforcing member 122 includes a first rib 1221 and a plurality of second ribs 1222. Each second rib 1222 is connected between the first wall 1211 and the second wall 1212, and the plurality of second ribs 1222 are spaced apart along the second direction Y. The first rib 1221 connects to the plurality of second ribs 1222. The first direction X intersects the second direction Y. The battery cell 20 is disposed within the receiving space 111 and is disposed along the first direction X with the limiting beam 12.

[0082] A battery device may include one or more battery cell assemblies for providing voltage and capacity.

[0083] A battery cell assembly may include multiple battery cells 20, which are connected in series, parallel, or mixed connection via a busbar. Mixed connection means that some of the multiple battery cells 20 are connected in series and others in parallel.

[0084] The battery cell 20 can be a rechargeable battery. A rechargeable battery is a type of battery that can be used again after being discharged by recharging to activate the active materials.

[0085] As an example, the battery cell 20 can be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-metal hydride battery cell, a nickel-cadmium battery cell, a lead-acid battery cell, etc.

[0086] As an example, the battery cell 20 can be a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells, such as hexagonal prismatic battery cells.

[0087] A battery cell assembly is typically formed by arranging multiple battery cells 20; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells 20 together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells 20 together with cable ties.

[0088] The battery device can be a battery pack, which includes a housing 10 and one or more battery cell assemblies, the battery cell assemblies being housed in the housing 10.

[0089] The limiting beam 12 can be detachably connected to the housing 11 or fixedly mounted on the housing 11. The limiting beam 12 can be directly connected to the housing 11 or restrained on the housing 11 by other components. As an example, the connection method between the limiting beam 12 and the housing 11 can be, but is not limited to, welding, bolting, plugging, snap-fitting, riveting, or bonding.

[0090] Optionally, the housing 11 may be made of metallic or non-metallic materials. For example, metallic materials may be, but are not limited to, aluminum alloy or stainless steel, and non-metallic materials may be, but are not limited to, polycarbonate, polyamide, polyphenylene sulfide or polybutylene terephthalate, etc.

[0091] Optionally, the shell 11 may be made of fiber-reinforced composite materials, such as glass fiber reinforced composite materials, carbon fiber reinforced composite materials, or aramid fiber reinforced composite materials.

[0092] The reinforcing member 122 is connected to the beam 121. The reinforcing member 122 can be detachably connected to the beam 121 or fixedly mounted on the beam 121. The reinforcing member 122 can be directly connected to the beam 121 or constrained to the beam 121 by other components. As an example, the connection method between the reinforcing member 122 and the beam 121 can be, but is not limited to, welding, bolting, plugging, snap-fitting, riveting, or bonding.

[0093] For example, the first rib 1221 connects to a plurality of second ribs 1222, so that the reinforcing member 122 can form a plurality of I-shaped structures arranged along the second direction Y.

[0094] The first rib 1221 can be detachably connected to the second rib 1222, or it can be fixedly mounted on the second rib 1222. The first rib 1221 can be directly connected to the second rib 1222, or it can be constrained to the second rib 1222 by other components. As an example, the connection method between the first rib 1221 and the second rib 1222 can be, but is not limited to, welding, bolting, plugging, snap-fitting, riveting, or bonding.

[0095] Optionally, both the reinforcing member 122 and the beam 121 can be made of metallic or non-metallic materials. For example, metallic materials can be, but are not limited to, aluminum alloys or stainless steel, while non-metallic materials can be, but are not limited to, polycarbonate, polyamide, polyphenylene sulfide, or polybutylene terephthalate.

[0096] Optionally, both the reinforcing member 122 and the beam 121 can be made of fiber-reinforced composite materials, such as glass fiber reinforced composite materials, carbon fiber reinforced composite materials, or aramid fiber reinforced composite materials.

[0097] The reinforcement 122 of the above technical solution can improve the bending resistance of the beam 121. When the limiting beam 12 is squeezed by the expansion force of the battery cell 20 or subjected to external mechanical load, the multiple second ribs 1222 can form multi-point support between the first wall 1211 and the second wall 1212, which can effectively resist the deformation of the beam 121 and improve the overall structural stability of the beam.

[0098] Furthermore, the first rib 1221 connects to multiple second ribs 1222, which can transmit the stress on the multiple second ribs 1222. This allows the multiple second ribs 1222 to form a cooperative force-bearing path under the unified connection of the first rib 1221, improving the overall stress uniformity of the reinforcing member 122, reducing the risk of local stress concentration, thereby improving the overall structural stability of the limiting beam 12 and thus improving the reliability of the battery device.

[0099] In some embodiments, the first rib 1221 is connected to the middle region of the second rib 1222, which can further improve the overall stress uniformity of the reinforcing member 122.

[0100] It should be noted that the above embodiments include not only the case where the first rib 1221 is absolutely connected to the middle area of ​​the second rib 1222, but also the case where, as is commonly understood in engineering, the first rib 1221 is approximately connected to the middle area of ​​the second rib 1222.

[0101] In some embodiments, there are multiple first ribs 1221, and the multiple first ribs 1221 are spaced apart along the first direction X, which can further improve the overall stress uniformity of the reinforcing member 122.

[0102] Figure 8 This is a cross-sectional structural schematic diagram of the limiting beam of another battery device provided in some embodiments of this application.

[0103] Continue to refer Figure 8 In some embodiments, the reinforcing member 122 further includes a filler 1223, which fills between any two adjacent second reinforcing bars 1222.

[0104] The filler 1223 can be fixed to the second rib 1222, or it can be detachably connected to the second rib 1222. The filler 1223 can be directly connected to the second rib 1222, or it can be constrained to the second rib 1222 by other components. As an example, the connection method between the filler 1223 and the second rib 1222 can be, but is not limited to, welding, bolting, plugging, snap-fitting, riveting, or bonding.

[0105] Optionally, the filler 1223 may be made of the same material as the second rib 1222, or it may be made of a different material.

[0106] As an example, the filler 1223 is made of a different material than the second rib 1222. For example, the filler 1223 may be, but is not limited to, foamed polyurethane, thermoplastic elastomer, silicone rubber or gel material.

[0107] The filler 1223 can play a role in strengthening the support. When the limiting beam 12 is squeezed by the expansion force of the battery cell 20 or by external mechanical load, the compressive stress is no longer concentrated at the support node formed between the first wall 1211 and the second wall 1212 by the second rib 1222. Instead, it is borne and diffused by the filler 1223, thereby significantly improving the deformation resistance and stress uniformity of the limiting beam 12.

[0108] In some embodiments, the elastic modulus of the filler 1223 is less than the elastic modulus of the second rib 1222.

[0109] The above-mentioned technical solution can form a rigid-flexible coupling connection structure between the filler 1223 and the second rib 1222, which not only helps with stress coordination and impact absorption, but also significantly improves the deformation adaptability of the entire limiting beam 12 and reduces the risk of fatigue cracking of the limiting beam 12.

[0110] As an example, the elastic modulus of the filler 1223 and the second rib 1222 can be tested with reference to the national standard GB / T 22315-2008 "Metallic Materials - Test Method for Elastic Modulus and Poisson's Ratio".

[0111] In some embodiments, the beam 121 has an opening 1214 at one end along the second direction Y, the opening 1214 connecting the first cavity 1213 and the external environment. The reinforcement 122 is configured to be movable along the second direction Y to enter or exit the first cavity 1213 through the opening 1214.

[0112] For example, the reinforcing member 122 and the beam 121 are formed independently, and the reinforcing member 122 is inserted into the first cavity 1213 through the opening 1214 to form the limiting beam 12.

[0113] By providing an opening 1214 at one end of the beam 121 along the second direction Y, and enabling the reinforcing member 122 to move along the second direction Y to enter or exit the first cavity 1213 through the opening 1214, this structure not only simplifies the processing technology of the limiting beam 12, but also realizes the structural modularization, maintainability and efficient assembly of the limiting beam 12.

[0114] Figure 9 for Figure 3 A magnified schematic diagram of the local structure at point H. Figure 10 for Figure 9 The diagram shows a partial split structure.

[0115] Continue to refer Figure 9 and Figure 10 In some embodiments, the beam 121 is provided with a first insertion portion 123, which is located inside the first cavity 1213 and extends along the second direction Y. The reinforcing member 122 is provided with a second insertion portion 124 corresponding to the first insertion portion 123, and the first insertion portion 123 is used to insert and cooperate with the second insertion portion 124.

[0116] The first insertion part 123 can be detachably connected to the beam 121 or fixedly mounted on the beam 121. The first insertion part 123 can be directly connected to the beam 121 or constrained to the beam 121 by other components. As an example, the connection method between the first insertion part 123 and the beam 121 can be, but is not limited to, bolt connection, insertion, snap-fit, riveting, or bonding.

[0117] The second connector 124 can be detachably connected to the reinforcing member 122, or it can be fixedly mounted on the reinforcing member 122. The second connector 124 can be directly connected to the reinforcing member 122, or it can be constrained to the reinforcing member 122 by other components. As an example, the connection method between the second connector 124 and the reinforcing member 122 can be, but is not limited to, bolt connection, plug connection, snap connection, riveting, or adhesive connection.

[0118] The correspondence between the first plug part 123 and the second plug part 124 means that the positions, structural shapes and sizes of the first plug part 123 and the second plug part 124 are compatible.

[0119] For example, one of the first plug-in portion 123 and the second plug-in portion 124 is a slider, and the other of the first plug-in portion 123 and the second plug-in portion 124 is a groove.

[0120] The above technical solution, by introducing the insertion and engagement of the first insertion part 123 and the second insertion part 124, can play a positioning and guiding role in the assembly process of the reinforcing member 122 and the beam 121, so as to improve the assembly efficiency of the limiting beam 12.

[0121] In some embodiments, the first plug portion 123 is connected to at least one of the first wall 1211 and the second wall 1212.

[0122] In some embodiments, there are two first plug-in portions 123, one of which is connected to the first wall 1211 and the other of which is connected to the second wall 1212.

[0123] In some embodiments, the number of first plug-in portions 123 is four. Two of the four first plug-in portions 123 are connected to the first wall 1211, and the two first plug-in portions 123 on the first wall 1211 are spaced apart along the third direction Z. The other two of the four first plug-in portions 123 are connected to the second wall 1212, and the two first plug-in portions 123 on the second wall 1212 are spaced apart along the third direction Z.

[0124] Figure 11 This is a top view of the beam structure of a limiting beam for a battery device provided in some embodiments of this application.

[0125] Continue to refer Figure 11 In some embodiments, the beam 121 further includes a third wall 1215 and a fourth wall 1216, which are located on opposite sides of the first cavity 1213 along the third direction Z, with the first direction X, the second direction Y, and the third direction Z being perpendicular to each other. The third wall 1215 is connected to the first wall 1211 and the second wall 1212, and the fourth wall 1216 is connected to the first wall 1211 and the second wall 1212. The first rib 1221 is connected between the third wall 1215 and the fourth wall 1216.

[0126] By connecting the first rib 1221 to the third wall 1215 and the fourth wall 1216, the structural stability of the first rib 1221 itself can be improved, and the entire limiting beam 12 can form a more balanced three-dimensional support structure, which significantly improves the structural stability of the limiting beam 12 under complex loads and further improves the overall reliability of the battery device.

[0127] In some embodiments, the first wall 1211, the second wall 1212, the third wall 1215 and the fourth wall 1216 are integrally formed structures, which not only simplifies the manufacturing process but also improves the structural stability of the beam 121.

[0128] In some embodiments, the second rib 1222 is connected between the third wall 1215 and the fourth wall 1216. This can further extend the supporting role of the second rib 1222 in the third direction Z, enhance the deformation resistance of the limiting beam 12 in the third direction Z, and further improve the overall structural stability of the limiting beam 12.

[0129] In some embodiments, the first plug portion 123 is connected to at least one of the third wall 1215 and the fourth wall 1216.

[0130] In some embodiments, there are two first plug-in portions 123, one of which is connected to the third wall 1215, and the other of which is connected to the fourth wall 1216.

[0131] Figure 12 This is a cross-sectional structural diagram of the fitting of a limiting beam and a base plate in a battery device provided in some embodiments of this application.

[0132] Continue to refer Figure 12 In some embodiments, the housing 11 includes a base plate 113, the battery cell 20 is supported on the base plate 113, and the beam 121 is connected to the base plate 113.

[0133] The beam 121 can be detachably connected to the base plate 113 or fixedly mounted on the base plate 113. The beam 121 can be directly connected to the base plate 113 or constrained to the base plate 113 by other components. As an example, the connection method between the beam 121 and the base plate 113 can be, but is not limited to, bolt connection, plug-in connection, snap-fit ​​connection, riveting, or adhesive connection.

[0134] By connecting the limiting beam 12 with the base plate 113 to form an integrated structure, the overall mechanical performance stability of the limiting beam 12 can be improved.

[0135] In some embodiments, the beam 121 and the base plate 113 are integrally formed. On the one hand, there is no need to connect the beam 121 and the base plate 113 through additional connection processes, simplifying the manufacturing process. On the other hand, compared with connecting the beam 121 and the base plate 113 through additional connection processes, the integral structure of the beam 121 and the base plate 113 has higher structural strength.

[0136] In some embodiments, the beam 121 further includes a fifth wall 1217, which is located on one side of the first cavity 1213 along the second direction Y. The fifth wall 1217 connects the first wall 1211 and the second wall 1212 and is attached to the bottom plate 113.

[0137] The close-fitting design of the fifth wall 1217 and the bottom plate 113 helps to increase the overall thickness of the bottom of the housing 10, thereby improving the battery device's resistance to bottom ball impacts.

[0138] In some embodiments, the fifth wall 1217 is thermally fused to the base plate 113.

[0139] Compared to traditional screws or bonding methods, thermofusion bonding has advantages such as no metal parts, high connection strength, excellent sealing performance, and low manufacturing cost, making it particularly suitable for battery applications requiring high vibration or lightweight design.

[0140] Figure 13 This is a cross-sectional schematic diagram of the fitting structure of the limiting beam and the base plate of another battery device provided in some embodiments of this application. Figure 14 for Figure 13The diagram shows a partial split structure.

[0141] Continue to refer Figures 13 to 14 In some embodiments, the housing 11 further includes a mounting portion 112, which includes a first plate 1121, a second plate 1122, and a second cavity 1123. Both the first plate 1121 and the second plate 1122 are connected to the base plate 113, and are located on opposite sides of the second cavity 1123 along a first direction X. At least a portion of the beam 121 is disposed within the second cavity 1123. A first wall 1211 is fitted to the first plate 1121, and a second wall 1212 is fitted to the second plate 1122.

[0142] For example, the beam 121 may be partially disposed within the second cavity 1123 or may be entirely disposed within the second cavity 1123.

[0143] The first plate 1121 can be detachably connected to the base plate 113, or it can be fixedly mounted on the base plate 113. The first plate 1121 can be directly connected to the base plate 113, or it can be constrained to the base plate 113 by other components. As an example, the connection method between the first plate 1121 and the base plate 113 can be, but is not limited to, bolt connection, plug-in connection, snap-fit ​​connection, riveting, or adhesive connection.

[0144] The second plate 1122 can be detachably connected to the base plate 113, or it can be fixedly mounted on the base plate 113. The second plate 1122 can be directly connected to the base plate 113, or it can be constrained to the base plate 113 by other components. As an example, the connection method between the second plate 1122 and the base plate 113 can be, but is not limited to, bolt connection, plug-in connection, snap-fit ​​connection, riveting, or adhesive connection.

[0145] On the one hand, the aforementioned structure can increase the contact area between the limiting beam 12 and the shell 11, thereby improving the structural stability of the limiting beam 12. On the other hand, the first plate 1121 and the second plate 1122 can also play a positioning role during the assembly process of the limiting beam 12, improving assembly efficiency. In addition, the first plate 1121 and the second plate 1122 can effectively limit the displacement of the limiting beam 12 along the first direction X, and can bear part of the stress for the limiting beam 12, thereby effectively improving the load-bearing capacity of the limiting beam 12.

[0146] In some embodiments, the first wall 1211 is thermally fused to the first plate 1121, and the second wall 1212 is thermally fused to the second plate 1122.

[0147] Compared to traditional screws or bonding methods, thermofusion bonding has advantages such as no metal parts, high connection strength, excellent sealing performance, and low manufacturing cost, making it particularly suitable for battery applications requiring high vibration or lightweight design.

[0148] In some embodiments, the first plate 1121, the second plate 1122, and the base plate 113 are integrally formed, which not only simplifies the manufacturing process but also improves the structural stability of the mounting part 112.

[0149] In some embodiments, the number of limiting beams 12 is multiple, and the multiple limiting beams 12 are arranged at intervals along the first direction X.

[0150] Figure 15 This is a top view of the casing of a battery device provided in some embodiments of this application. Figure 16 for Figure 15 A schematic diagram of the cross-sectional structure along BB. Figure 17 This is a three-dimensional structural diagram of a support member for a battery device provided in some embodiments of this application.

[0151] Continue to refer Figures 15 to 17 In some embodiments, the housing 11 includes a support member 100 and an outer frame 110. The support member 100 includes a fiber composite base plate 101, and a receiving space 111 is located above the fiber composite base plate 101. The battery cell 20 is supported on the fiber composite base plate 101. The outer frame 110 is a non-metallic structural component, and the fiber composite base plate 101 is connected to the outer frame 110. The outer frame 110 is used to support the support member 100.

[0152] In this embodiment, the battery cell 20 can be placed within the receiving space 111 of the housing 11. The battery cell 20 is located above the fiber composite base plate 101. The fiber composite base plate 101 supports the battery cell 20. The outer frame 110 can provide protection for the battery cell 20 from its periphery.

[0153] For example, the housing 10 may be disposed at the bottom of the vehicle. The housing 10 may be connected to the vehicle via an outer frame 110. The outer frame 110 supports the support member 100. Forces acting on the support member 100 may be transmitted to the vehicle via the outer frame 110.

[0154] The fact that the battery cell 20 is supported by the fiber composite base plate 101 means that the fiber composite base plate 101 is used to provide support for the battery cell 20, wherein the support provided by the fiber composite base plate 101 to the battery cell 20 is relative to the gravity of the battery cell 20.

[0155] In some examples, the fiber composite base plate 101 can be manufactured using an injection molding process.

[0156] In some examples, the material of the fiber composite base plate 101 may include, but is not limited to, glass fiber resin composite material or carbon fiber resin composite material. For example, the fiber composite base plate 101 may be manufactured using glass fiber resin composite material or carbon fiber resin composite material.

[0157] In some examples, the outer frame 110 may be manufactured using an injection molding process.

[0158] In some examples, the material of the outer frame 110 may include, but is not limited to, plastic. The material of the outer frame 110 may not include high-strength fibers.

[0159] In some examples, the fiber composite base plate 101 and the outer frame 110 are manufactured separately, and then the fiber composite base plate 101 and the outer frame 110 are connected to form an integral structure.

[0160] The fiber composite base plate 101 has good impact resistance. For example, during a bottom ball impact test on the housing 10, the fiber composite base plate 101 can absorb the impact energy of the test ball, buffer the impact force, and reduce the possibility of damage or failure of the battery cells 20 inside the housing 10 due to impact. At the same time, the fiber composite base plate 101 and the outer frame 110 are relatively lightweight, which is beneficial to the lightweight design of the housing 10.

[0161] In some examples, the battery device also includes a cover. The cover can close onto the housing 11. The cover can close the receiving space 111 of the housing 11.

[0162] In some examples, the shell 11 can be of various shapes, such as a cylinder, a cuboid, etc.

[0163] In some examples, to improve the sealing performance after the cover plate is connected to the housing 11, a sealing body, such as sealant or sealing ring, can also be provided between the cover plate and the housing 11.

[0164] The housing 10 of this embodiment includes a support member 100 and an outer frame 110 connected to each other. The fiber composite base plate 101 of the support member 100 supports the battery cell 20. The outer frame 110 is a non-metallic structural component. The outer frame 110 supports the support member 100. The housing 10 can be mounted on an electrical device, such as the bottom of a vehicle, via the outer frame 110. The fiber composite base plate 101 itself has relatively high impact resistance, which helps improve the impact resistance of the bottom of the housing 10. The frame itself has good structural strength, providing protection for the battery cell 20. Simultaneously, the fiber composite base plate 101 and the outer frame 110 are relatively lightweight, which is beneficial for achieving a lightweight design of the housing 10. Therefore, the housing 10 of this embodiment can balance bottom structural strength and overall lightweight design, which is beneficial for balancing the reliability and energy density of the battery device.

[0165] In some embodiments, the outer frame 110 is an integrally formed structure, which is beneficial to improve the overall structural strength of the outer frame 110, improve the overall impact resistance of the box 10, and improve the structural reliability of the box 10.

[0166] In some embodiments, the outer frame 110 is integrally manufactured by injection molding.

[0167] In some embodiments, the support member 100 further includes a fiber composite side plate 102. The fiber composite base plate 101 and the fiber composite side plate 102 are connected. The fiber composite side plate 102 is connected to the inner side of the outer frame 110. The fiber composite base plate 101 and the fiber composite side plate 102 form a receiving space 111.

[0168] When battery cells 20 are installed inside the housing 10, the fiber composite side panel 102 can provide circumferential protection for the battery cells 20. The fiber composite side panel 102 has good resistance to impact deformation. It can also improve the housing 10's resistance to lateral extrusion. When the housing 10 bears lateral impact forces, the outer frame 110 and the fiber composite side panel 102 can absorb the lateral impact force, buffer the impact, and reduce the possibility of damage or failure of the battery cells 20 inside the housing 10 due to impact. Simultaneously, the fiber composite side panel 102 itself is relatively lightweight, which is beneficial for achieving a lightweight design of the housing 10.

[0169] In some examples, the fiber composite side panel 102 can be manufactured using an injection molding process. In some examples, the material of the fiber composite side panel 102 can be, but is not limited to, glass fiber resin composite material or carbon fiber resin composite material. For example, the fiber composite side panel 102 can be manufactured using glass fiber resin composite material or carbon fiber resin composite material.

[0170] In some examples, the fiber composite base plate 101, fiber composite side plate 102 and outer frame 110 are manufactured separately, and then the fiber composite base plate 101, fiber composite side plate 102 and outer frame 110 are connected to form an integral structure.

[0171] In some examples, the fiber composite base plate 101 and the fiber composite side plate 102 are integrally molded structures. Exemplarily, the fiber composite base plate 101 and the fiber composite side plate 102 are made of the same material. The fiber composite base plate 101 and the fiber composite side plate 102 are integrally molded using an injection molding process.

[0172] In some examples, the fiber composite base plate 101 and the fiber composite side plate 102 are integrally molded structures. The fiber composite base plate 101, the fiber composite side plate 102, and the outer frame 110 are integrally molded by injection molding.

[0173] In some embodiments, the support member 100 further includes a fiber composite flange 103. The top end of the fiber composite side plate 102 is connected to the fiber composite flange 103. The fiber composite flange 103 is connected to the outer frame 110.

[0174] During the connection process between the support member 100 and the outer frame 110, the support member 100 can be positioned by the fiber composite flange 103, which helps to reduce the connection difficulty between the support member 100 and the outer frame 110.

[0175] In some examples, the fiber composite flange 103 can be manufactured using injection molding. In some examples, the material of the fiber composite flange 103 can be, but is not limited to, glass fiber resin composite material or carbon fiber resin composite material. For example, the fiber composite flange 103 can be manufactured using glass fiber resin composite material or carbon fiber resin composite material.

[0176] In some examples, the fiber composite base plate 101, fiber composite side plate 102, fiber composite flange 103 and outer frame 110 are manufactured separately, and then the fiber composite base plate 101, fiber composite side plate 102, fiber composite flange 103 and outer frame 110 are connected to form an integral structure.

[0177] In some examples, the fiber composite base plate 101, fiber composite side plate 102, and fiber composite flange 103 are integrally formed, which helps to reduce the processing difficulty of the support 100 and improve the overall structural strength of the support 100.

[0178] For example, the fiber composite base plate 101, the fiber composite side plate 102, and the fiber composite flange 103 are made of the same material. The fiber composite base plate 101, the fiber composite side plate 102, and the fiber composite flange 103 are integrally molded using an injection molding process.

[0179] In some examples, at least one of the fiber composite base plate 101, fiber composite side plate 102, and fiber composite flange 103 is connected to the outer frame 110 by injection molding, bonding, welding, or riveting.

[0180] The fiber composite base plate 101, fiber composite side plate 102 and fiber composite flange 103 can be connected to the outer frame 110 in various ways, which helps to improve the connection flexibility between the fiber composite base plate 101, fiber composite side plate 102 and fiber composite flange 103 and the outer frame 110.

[0181] In some examples, the fiber composite base plate 101, fiber composite side plate 102, and fiber composite flange 103 are each injection molded with the outer frame 110.

[0182] In some examples, the fiber composite base plate 101, fiber composite side plate 102, and fiber composite flange 103 are integrally molded structures. The outer frame 110 itself is an integrally molded structure. The support member 100 is placed in a corresponding mold, and then non-metallic material is injected into the mold to form the outer frame 110, resulting in an integral structure in which the support member 100 and the outer frame 110 are interconnected. The support member 100 and the outer frame 110 are connected by a fusion bonding method.

[0183] In some examples, at least one of the fiber composite base plate 101, fiber composite side plate 102, and fiber composite flange 103 is bonded to the outer frame 110 by an adhesive.

[0184] In some examples, at least one of the fiber composite base plate 101, fiber composite side plate 102, and fiber composite flange 103 is connected to the outer frame 110 by hot plate welding or ultrasonic welding.

[0185] In some examples, at least one of the fiber composite base plate 101, fiber composite side plate 102, and fiber composite flange 103 is connected to the outer frame 110 by rivets.

[0186] In some embodiments, the fiber composite base plate 101 and the fiber composite side plate 102 form a structure with a side opening 104.

[0187] In some embodiments, the fiber composite base plate 101 is configured as base plate 113.

[0188] According to some embodiments of this application, this application also provides an electrical device, including a battery device of any of the above schemes, the battery device being used to store or provide electrical energy.

[0189] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions. All technical features and optional technical features of this application can be combined to form new technical solutions.

[0190] To better understand the battery device provided in the embodiments of this application, based on the same inventive concept, embodiments of the above-described battery device in practical applications are described herein.

[0191] This application provides a battery device, which includes a housing 10 and a battery cell 20. The housing 10 includes a shell 11 and a limiting beam 12. The shell 11 has a receiving space 111. The limiting beam 12 is disposed within the receiving space 111 and connected to the shell 11. The limiting beam 12 includes a beam body 121 and a reinforcing member 122. The beam body 121 includes a first wall 1211, a second wall 1212, and a first cavity 1213. The first wall 1211 and the second wall 1212 are respectively located on both sides of the first cavity 1213 along a first direction X. The reinforcing member 122 is disposed within the first cavity 1213.

[0192] The reinforcing member 122 includes a first rib 1221, a plurality of second ribs 1222, and a filler 1223. Each second rib 1222 is connected between the first wall 1211 and the second wall 1212, and the plurality of second ribs 1222 are spaced apart along the second direction Y. The first rib 1221 connects the plurality of second ribs 1222, and the filler 1223 fills between any two adjacent second ribs 1222. The first direction X intersects the second direction Y.

[0193] The battery cell 20 is disposed within the receiving space 111 and is positioned along the first direction X with the limiting beam 12. One end of the beam 121 along the second direction Y has an opening 1214, which connects the first cavity 1213 to the external environment. The reinforcing member 122 is configured to be movable along the second direction Y to enter or exit the first cavity 1213 through the opening 1214.

[0194] The reinforcement 122 of the above technical solution can improve the bending resistance of the beam 121. When the limiting beam 12 is squeezed by the expansion force of the battery cell 20 or subjected to external mechanical load, the multiple second ribs 1222 can form multi-point support between the first wall 1211 and the second wall 1212, which can effectively resist the deformation of the beam 121 and improve the overall structural stability of the beam.

[0195] Furthermore, the first rib 1221 connects to multiple second ribs 1222, which can transmit the stress on the multiple second ribs 1222. This allows the multiple second ribs 1222 to form a cooperative force-bearing path under the unified connection of the first rib 1221, improving the overall stress uniformity of the reinforcing member 122, reducing the risk of local stress concentration, thereby improving the overall structural stability of the limiting beam 12 and thus improving the reliability of the battery device.

[0196] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0197] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure includes a shell and a limiting beam. The shell has an accommodating space, and the limiting beam is disposed within the accommodating space and connected to the shell. The limiting beam includes a beam body and a reinforcing member. The beam body includes a first wall, a second wall, and a first cavity. The first wall and the second wall are respectively located on both sides of the first cavity along a first direction. The reinforcing member is disposed within the first cavity. The reinforcing member includes a first rib and a plurality of second ribs, each of the second ribs being connected between the first wall and the second wall, and the plurality of second ribs being spaced apart along a second direction, the first ribs being connected to the plurality of second ribs, and the first direction intersecting the second direction; A single battery cell is disposed within the accommodating space and is arranged along the first direction with the limiting beam.

2. The battery device according to claim 1, characterized in that, The reinforcing member further includes a filler that fills the space between any two adjacent second reinforcing bars.

3. The battery device according to claim 2, characterized in that, The elastic modulus of the filler is less than that of the second rib.

4. The battery device according to claim 1, characterized in that, The beam has an opening at one end along the second direction, and the opening connects the first cavity to the external environment; The reinforcement is configured to move along the second direction to enter or exit the first cavity through the opening.

5. The battery device according to claim 4, characterized in that, The beam is provided with a first insertion part, which is located in the first cavity and extends along the second direction; The reinforcing member is provided with a second plug-in portion corresponding to the first plug-in portion, and the first plug-in portion is used to plug into and cooperate with the second plug-in portion.

6. The battery device according to claim 1, characterized in that, The beam also includes a third wall and a fourth wall, which are located on both sides of the first cavity along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other; The third wall is connected to the first wall and the second wall, the fourth wall is connected to the first wall and the second wall, and the first rib is connected between the third wall and the fourth wall.

7. The battery device according to claim 6, characterized in that, The second rib is connected between the third wall and the fourth wall.

8. The battery device according to claim 1, characterized in that, The housing includes a base plate, the battery cells are supported on the base plate, and the beam is connected to the base plate.

9. The battery device according to claim 8, characterized in that, The beam also includes a fifth wall, which is located on one side of the first cavity along the second direction. The fifth wall connects the first wall and the second wall and is attached to the bottom plate.

10. The battery device according to claim 8, characterized in that, The housing further includes a mounting portion, which includes a first plate, a second plate, and a second cavity. The first plate and the second plate are both connected to the bottom plate, and the first plate and the second plate are respectively located on both sides of the second cavity along the first direction. At least a portion of the beam is disposed in the second cavity. The first wall is attached to the first plate, and the second wall is attached to the second plate.

11. The battery device according to claim 1, characterized in that, The housing includes a support member and an outer frame. The support member includes a fiber composite base plate. The accommodating space is located above the fiber composite base plate, and the battery cell is supported on the fiber composite base plate. The outer frame is a non-metallic structural component, and the fiber composite base plate is connected to the outer frame. The outer frame is used to support the support component.

12. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-11, the battery device being used to store or provide electrical energy.

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