Battery device and electric appliance

Abstract

This application provides a battery device and an electrical appliance. The battery device includes: a housing body having a receiving compartment; an expansion beam including a main body; the main body being disposed within the receiving compartment, dividing the receiving compartment into an energy compartment and a control compartment; a plurality of battery cells disposed within the energy compartment; and a reinforcing beam including a main body; the main body being disposed within the control compartment, fixedly connected to the wall of the receiving compartment, and abutting against the main body; the expansion beam further includes an extension disposed within the control compartment; the extension is connected to the main body and at least partially abuts against the top surface of the main body. In this way, the reinforcing beam not only enhances the rigidity of a local area and improves the overall structural strength of the battery device, but also provides additional support points for the expansion beam, optimizes the stress transmission path, increases the deformable stress zone, and improves the reliability of the battery device.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development. Related technologies include battery packs and expansion beams. However, the reliability of existing battery packs needs improvement. Utility Model Content

[0003] The main technical problem addressed by this application is to provide a battery device and electrical equipment that improves the reliability of the battery device.

[0004] To solve the above-mentioned technical problems, in a first aspect, this application adopts a technical solution that provides a battery device, comprising:

[0005] The box itself has a storage compartment;

[0006] An expansion beam includes a main body; the main body is disposed within the receiving chamber, dividing the receiving chamber into an energy chamber and a control chamber.

[0007] Several individual battery cells are disposed within the energy chamber;

[0008] The reinforcing beam includes a main body; the main body is disposed inside the control compartment, fixedly connected to the wall of the receiving compartment, and abuts against the main body;

[0009] The expansion beam further includes an extension disposed within the control compartment; the extension is connected to the main body and at least partially abuts against the top surface of the main body.

[0010] In the above technical solution, the main body of the reinforcing beam abuts against the main body of the expansion beam, and the extension of the expansion beam is connected to the main body of the reinforcing beam and at least partially abuts against the top surface of the main body. In this way, the reinforcing beam not only enhances the rigidity of the local area, thereby improving the overall structural strength of the battery device, but also provides additional support points for the expansion beam, optimizes the stress transmission path, increases the deformable stress area, and disperses the stress borne by the bottom wall of the box body corresponding to the bottom of the expansion beam and the bottom of the expansion beam, so that the expansion beam can better withstand greater stress and improve the reliability of the battery device.

[0011] In some embodiments, the reinforcing beam further includes:

[0012] A first flange is connected to the side of the body portion away from the main body portion and is fixedly connected to the bottom wall of the control compartment; and / or

[0013] The second flange is connected to the side of the body portion near the main body portion, and is disposed between the main body portion and the bottom wall of the receiving compartment, and is fixedly connected to the bottom wall of the receiving compartment.

[0014] In the above technical solution, the connection between the main body and the housing body is made more stable by fixing the first flange to the bottom wall of the control compartment and / or by fixing the second flange to the bottom wall of the housing compartment, and provides multiple installation options for the main body to adapt to different assembly requirements. The first flange can transfer the stress on the expansion beam to the area of ​​the bottom wall of the control compartment corresponding to the first flange, thus dispersing the stress on the expansion beam. The second flange serves to support the main body of the expansion beam and transfer the stress on the expansion beam to the area of ​​the bottom wall of the housing compartment corresponding to the second flange, thus dispersing the stress on the expansion beam and improving the reliability of the battery device.

[0015] In some embodiments, the reinforcing beam includes a second flange, one end of which is located away from the body portion between the body portion and the bottom wall of the receiving compartment, and the end of the second flange away from the body portion is spaced apart from the end of the bottom wall of the body portion away from the body portion.

[0016] In the above technical solution, by setting the end of the second flange away from the main body and the end of the bottom wall of the main body away from the main body at a distance, the end of the second flange is recessed into the edge of the bottom wall of the main body, forming a physical shield. When the battery cell expands, the risk of the end of the second flange puncturing the battery cell can be reduced.

[0017] In some embodiments, the distance between the end of the second flange away from the body portion and the end of the bottom wall of the body portion away from the body portion is 3mm-5mm.

[0018] In the above technical solution, the distance between the end of the second flange away from the main body and the end of the bottom wall of the main body away from the main body is 3mm-5mm. This makes it less likely for the end of the second flange away from the main body to extend beyond the bottom wall of the main body and puncture the battery cell. It also allows the bottom of the expansion beam to be placed more on the second flange, dispersing the stress through the second flange and reducing the risk of structural deformation caused by stress concentration.

[0019] In some embodiments, the reinforcing beam includes the first flange, and a plurality of high-pressure control elements are disposed on the surface of the first flange away from the bottom wall of the containment chamber.

[0020] In the above technical solution, the high-pressure control element is placed on the surface of the first flange away from the bottom wall of the housing. This provides additional support and protection for the high-pressure control element and reduces electrical failures caused by external impacts or internal stress.

[0021] In some embodiments, the body portion includes:

[0022] The first top wall is spaced apart from the bottom wall of the receiving chamber;

[0023] The first sidewall is connected at one end to the first top wall;

[0024] The second sidewall is connected at one end to the first top wall; the second sidewall is disposed between the first sidewall and the main body and abuts against the main body;

[0025] The reinforcing beam includes a first flange and a second flange; the first flange is connected to the end of the first sidewall away from the first top wall; the second flange is connected to the end of the second sidewall away from the first top wall.

[0026] In the above technical solution, the stress on the expansion beam can be dispersed through the path of the second flange, the second side wall, the first top wall, the first side wall, and the first flange, thereby improving the stress-bearing capacity of the expansion beam; the first top wall and the bottom wall of the container form a hollow structure, which reduces weight while maintaining compressive strength; and this structure of the main body can form a good synergistic effect with other parts of the box body, which can jointly resist the influence of external impact and internal stress.

[0027] In some embodiments, both the extension and the first top wall are parallel to the bottom wall of the receiving compartment.

[0028] The above technical solution facilitates the coordination and installation of various components, and at the same time makes the stress on the extension and the first top wall more uniform. This is beneficial for the stress on the expansion beam to be transmitted to the first top wall through the extension, and then to the first side wall, the first flange, and even the bottom wall of the control compartment.

[0029] In some embodiments, the extension is detachably connected to the first top wall by fasteners, and both the first flange and the second flange are welded to the bottom wall of the receiving chamber.

[0030] In the above technical solution, the extension is detachably connected to the first top wall by fasteners, which facilitates the maintenance and replacement of the reinforcing beam and the expansion beam; the first flange and the second flange are connected to the bottom wall of the container by welding, which is simple to operate and improves the stability of the connection.

[0031] In some embodiments, the extension further extends to the surface of the first sidewall away from the second sidewall, and the extension is detachably connected to the first sidewall by fasteners.

[0032] In the above technical solution, the extension extends to the first side wall and is connected by fasteners, which increases the contact area between the extension and the expansion beam, improves the structural redundancy, and enhances the stability and reliability of the connection between the two.

[0033] In some embodiments, the reinforcing beam is detachably connected to the expansion beam, and the reinforcing beam is welded, glued, or connected to the wall of the control compartment by fasteners.

[0034] In the above technical solution, the detachable connection between the reinforcing beam and the expansion beam facilitates their replacement, repair or adjustment; welding, gluing or fastener connection improves the stability of the connection between the reinforcing beam and the bottom wall of the control chamber, and the operation is simple.

[0035] In some embodiments, the reinforcing beam is a one-piece structure, or the reinforcing beam comprises a plurality of sub-reinforcing beams along its length.

[0036] In the above technical solutions, the one-piece molded structure has high strength and simplified manufacturing steps; multiple sub-reinforcing beams facilitate maintenance and replacement and can adapt to complex shapes or segmented load-bearing requirements.

[0037] In some embodiments, the reinforcing beam is a metal structural component or a fiber-reinforced resin composite structural component.

[0038] In the above technical solutions, metal structural components have high strength, are easy to process, and are not easily damaged; fiber-reinforced resin composite structural components have high strength and low density, which can achieve the purpose of weight reduction and reduce the weight of the reinforcing beam.

[0039] In some embodiments, the main body includes:

[0040] The second top wall and the second bottom wall are arranged opposite to each other and spaced apart.

[0041] The third and fourth sidewalls are respectively connected to the second top wall and the second bottom wall; the second top wall, the second bottom wall, the third sidewall, and the fourth sidewall define a cavity;

[0042] The reinforcing component is disposed within the cavity;

[0043] The extension is connected to the fourth sidewall and is located between the second top wall and the second bottom wall.

[0044] In the above technical solution, the cavity facilitates the expansion beam to absorb energy and improve the structural strength; the reinforcement can improve the overall structural strength of the expansion beam and better bear the expansion force of the battery cell; the extension is connected to the fourth side wall of the main body and is located between the second top wall and the second bottom wall of the main body, which can change the force transmission path in the structure and make the force more evenly distributed in the entire structure.

[0045] To solve the above-mentioned technical problems, in a second aspect, another technical solution adopted by this application is to provide an electrical device, including the battery device provided in any of the above embodiments.

[0046] In the above technical solution, the main body of the reinforcing beam abuts against the main body of the expansion beam, and the extension of the expansion beam is connected to the main body of the reinforcing beam and at least partially abuts against the top surface of the main body. In this way, the reinforcing beam not only enhances the rigidity of the local area, thereby improving the overall structural strength of the battery device, but also provides additional support points for the expansion beam, optimizes the stress transmission path, increases the deformable stress area, and disperses the stress borne by the bottom wall of the box body corresponding to the bottom of the expansion beam and the bottom of the expansion beam, so that the expansion beam can better withstand greater stress and improve the reliability of the battery device. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is an exploded view of the battery device provided in some embodiments of this application;

[0049] Figure 2 for Figure 1 A schematic diagram of the cross-section of the battery device along line II-II;

[0050] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0051] Figure 4 A schematic diagram of the assembly structure of the expansion beam and the reinforcing beam provided in some embodiments of this application;

[0052] Figure 5 A schematic diagram of the assembly structure of the expansion beam and the reinforcing beam provided for other embodiments of this application;

[0053] Figure 6 A schematic diagram of the assembly structure of the expansion beam and the reinforcing beam provided for some embodiments of this application;

[0054] Figure 7 A schematic diagram of the assembly structure of the expansion beam and the reinforcing beam provided in some embodiments of this application;

[0055] Figure 8 A schematic diagram of the assembly structure of the expansion beam and the reinforcing beam provided for other embodiments of this application;

[0056] Figure 9 A schematic diagram of the assembly structure of the expansion beam and the reinforcing beam provided for some embodiments of this application;

[0057] Figure 10 A schematic diagram of the assembly structure of the expansion beam and the reinforcing beam provided in some embodiments of this application;

[0058] Figure 11 A schematic diagram of the assembly structure of the expansion beam and the reinforcing beam provided for other embodiments of this application;

[0059] Figure 12 Schematic diagrams of the reinforcing beams provided in other embodiments of this application;

[0060] Figure 13 Schematic diagrams of expansion beam structures provided in other embodiments of this application;

[0061] Figure 14 This is a schematic diagram of the structure of the electrical equipment provided in the embodiments of this application.

[0062] Explanation of icon numbers:

[0063] 100-Battery assembly, 10-Box body, 11-First part, 12-Second part, 13-Containing compartment, 130-Energy compartment, 131-Control compartment, 20-Battery cell, 21-End cap, 22-Shell, 23-Electrode assembly, 21a-Electrode terminal, 23a-Electrode tab, 24-Connecting member, 25-Pressure relief mechanism, 30-Expansion beam, 31-Main body, 310-Second top wall, 311-Second bottom wall, 312-Third side wall, 313-Fourth side wall, 314-Cavity, 315-Reinforcing member, 32-Extension, 40-Reinforcing beam, 400-Sub-reinforcing beam, 41-Main body, 410-First top wall, 411-First side wall, 412-Second side wall, 42-First flange, 43-Second flange, 50-High voltage control element, 60-Fastener, 1000-Electrical equipment, 200-Electrical components. Detailed Implementation

[0064] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such processes, methods, products, or apparatus.

[0066] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0067] In the description of the embodiments of this application, the technical terms "first," "second," "third," etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more (including two), such as two, three, etc., unless otherwise explicitly defined. Similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple pieces" refers to two or more pieces (including two pieces).

[0068] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0069] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the relative orientation or positional relationship between the components in a certain posture (as shown in the accompanying drawings) as shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0070] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0071] Energy conservation and emission reduction are key to the sustainable development of the automotive industry, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of this sustainable development. For electric vehicles, battery technology is a crucial factor in their development. Among related technologies, battery devices include the casing and expansion beams.

[0072] However, because the expansion beam is directly attached to the bottom plate of the housing by welding or bolting, the area of ​​the bottom plate corresponding to the bottom of the expansion beam, as well as the bottom of the expansion beam, bears most of the stress, making it prone to failure. Therefore, the reliability of existing battery devices needs to be improved.

[0073] To address the aforementioned problems, this application provides a battery device comprising a housing body, an expansion beam, a plurality of battery cells, and a reinforcing beam. The housing body has a receiving compartment. The expansion beam includes a main body portion disposed within the receiving compartment, dividing the receiving compartment into an energy compartment and a control compartment. The plurality of battery cells are disposed within the energy compartment. The reinforcing beam includes a main body portion disposed within the control compartment, fixedly connected to the wall of the receiving compartment, and abutting against the main body portion. The expansion beam further includes an extension portion disposed within the control compartment. The extension portion is connected to the main body portion and at least partially abuts against the top surface of the main body portion.

[0074] In this embodiment, the main body of the reinforcing beam abuts against the main body of the expansion beam, and the extension of the expansion beam is connected to the main body of the reinforcing beam and at least partially abuts against the top surface of the main body. Thus, the reinforcing beam not only enhances the rigidity of the local area, thereby improving the overall structural strength of the battery device, but also provides additional support points for the expansion beam, optimizes the stress transmission path, increases the deformable stress area, and disperses the stress borne by the bottom wall of the housing body corresponding to the bottom of the expansion beam and the bottom of the expansion beam, so that the expansion beam can better withstand greater stress and improve the reliability of the battery device.

[0075] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0076] Please see Figure 1 and Figure 2 ,in, Figure 1 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application; Figure 2 for Figure 1 A cross-sectional schematic diagram of the battery device 100 along line II-II.

[0077] The battery device 100 provided in this embodiment includes a housing body 10, an expansion beam 30, a plurality of battery cells 20, and a reinforcing beam 40. The housing body 10 has a receiving compartment 13. The expansion beam 30 includes a main body 31. The main body 31 is disposed in the receiving compartment 13, dividing the receiving compartment 13 into an energy compartment 130 and a control compartment 131. A plurality of battery cells 20 are disposed in the energy compartment 130. The reinforcing beam 40 includes a main body 41. The main body 41 is disposed in the control compartment 131, fixedly connected to the compartment wall of the receiving compartment 13, and abuts against the main body 31. The expansion beam 30 also includes an extension 32 disposed in the control compartment 131. The extension 32 is connected to the main body 31 and at least partially abuts against the top surface of the main body 41.

[0078] The housing body 10 provides a receiving compartment 13 for the battery cell 20. The housing body 10 can adopt various structures. In some embodiments, the housing body 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining the receiving compartment 13. The second portion 12 can be a hollow structure with one open end, and the first portion 11 can be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the receiving compartment 13. Alternatively, both the first portion 11 and the second portion 12 can be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing body 10 formed by the first portion 11 and the second portion 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0079] The expansion beam 30 is a beam-like structure spanning the side walls of the housing body 10. The expansion beam 30 buffers the compressive force exerted when the battery cells 20 expand. The expansion beam 30 includes a main body 31 and an extension 32. The housing compartment 13 within the housing body 10 can be divided into two parts by the main body 31. One part is an energy compartment 130 defined by the main body 31 together with the side walls and bottom wall of the housing body 10, where several battery cells 20 can be arranged in an array. The other part is a control compartment 131 for accommodating a battery management system (BMS), high-voltage box, etc. The extension 32 is connected to the main body 31 and disposed within the control compartment 131. The expansion beam 30 can be made of sheet metal or extruded profile. The expansion beam 30 can be a metal structural component or a non-metallic composite material structural component. In some embodiments of this application, the expansion beam 30 is a non-metallic composite material structural component, which can be a resin and fiber composite material structural component, such as a carbon fiber reinforced resin structural component or a glass fiber reinforced resin structural component. The expansion beam 30 is configured to bend and deform as the battery cells 20 inside the energy chamber 130 expand.

[0080] Taking a square-shell battery cell as an example, when the battery cell 20 expands, the larger surface area of ​​the battery cell 20 allows for greater deformation. The superposition of the deformation of multiple battery cells 20 will cause the housing body 10 containing the battery cells 20 to expand and deform outward. As a relatively weak structural component forming the housing cavity, the expansion beam 30 will bend and deform directly under the action of the battery cell 20. Moreover, since the expansion amount of the battery cell 20 increases with the increase of its cycle number, the deformation amount of the expansion beam 30 also increases with the increase of the expansion amount of the battery cell 20.

[0081] In the battery device 100, several (two or more) battery cells 20 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that some of the battery cells 20 are connected in both series and parallel. Several battery cells 20 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of these battery cells 20 is housed within the housing body 10. Alternatively, the battery device 100 can also consist of several battery cells 20 first connected in series, parallel, or in a mixed configuration to form battery modules, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is then housed within the housing body 10. The battery device 100 may also include other structures; for example, it may include a busbar component for electrical connection between the several battery cells 20.

[0082] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0083] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 refers to the smallest unit that makes up a battery. Figure 3 The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0084] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure or impact, allowing battery cell 20 to have higher structural strength and improved stability. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, battery cell 20 further includes connecting member 24, with one connecting member 24 corresponding to each electrode terminal 21a, or may also be called a current collector, located between end cap 21 and electrode assembly 23, for electrically connecting electrode assembly 23 and electrode terminal 21a. In some embodiments, the end cap 21 may also be provided with a pressure relief mechanism 25 for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The end cap 21 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating member may also be provided on the inner side of the end cap 21. The insulating member can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating member can be plastic, rubber, etc.

[0085] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0086] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 23a. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0087] The reinforcing beam 40 is a structural component installed within the box body 10 to increase the structural strength of the box body 10 and the expansion beam 30. The structural strength of the reinforcing beam 40 can be greater than the structural strength of the box body 10 and / or the structural strength of the expansion beam 30. The reinforcing beam 40 can be a metal structural component or a carbon fiber composite structural component; these materials not only have good mechanical properties but also good stability under high-temperature environments. The reinforcing beam 40 includes a body portion 41, which is disposed within the control compartment 131 and fixedly connected to the wall of the receiving compartment 13. The main body portion 31 of the expansion beam 30 abuts against the body portion 41, and at least a portion of the extension portion 32 abuts against the top surface of the body portion 41, thereby providing better support for the expansion beam 30 with the reinforcing beam 40.

[0088] In this embodiment, the main body 41 of the reinforcing beam 40 abuts against the main body 31 of the expansion beam 30, and the extension 32 of the expansion beam 30 is connected to the main body 41 of the reinforcing beam 40 and at least partially abuts against the top surface of the main body 41. The reinforcing beam 40 not only enhances the rigidity of the local area, thereby improving the overall structural strength of the battery device 100, but also provides additional support points for the expansion beam 30, optimizes the stress transmission path, increases the deformable stress area, and disperses the stress borne by the bottom wall of the box body 10 corresponding to the bottom of the expansion beam 30 and the bottom of the expansion beam 30, so that the expansion beam 30 can better withstand greater stress and improve the reliability of the battery device.

[0089] Further reading is available upon request. Figure 2 In some embodiments, the reinforcing beam 40 further includes a first flange 42 and / or a second flange 43; the first flange 42 is connected to the side of the body portion 41 away from the main body portion 31 and is fixedly connected to the bottom wall of the control compartment 131; the second flange 43 is connected to the side of the body portion 41 close to the main body portion 31, is disposed between the main body portion 31 and the bottom wall of the receiving compartment 13, and is fixedly connected to the bottom wall of the receiving compartment 13.

[0090] The first flange 42 and the second flange 43 are structural components used to mount and fix the body portion 41 to the bottom wall of the control compartment 131. The first flange 42 and the second flange 43 can be flat structures such as rectangular or elongated shapes. In some embodiments, both the first flange 42 and the second flange 43 can be metal structural components and welded to the bottom wall of the receiving compartment 13. The bottom wall of the control compartment 131 and the bottom wall of the energy compartment 130 are both part of the bottom plate of the box body 10. The first flange 42, the second flange 43, and the body portion 41 can be integrally formed structures, for example, integral structures formed by bending or stamping techniques.

[0091] Alternatively, in some embodiments, please refer to Figure 2 , Figure 4 and Figure 5 The first flange 42 is connected to the side of the body part 41 away from the main body part 31. This makes it easy to fix the first flange 42 to the bottom wall of the control chamber 131, and an appropriate size can be selected as needed to make the range of deformable stress area larger and more conducive to stress dispersion.

[0092] Alternatively, in some embodiments, please refer to Figure 2 , Figure 6 and Figure 7 The second flange 43 is connected to the side of the main body 41 near the main body 31 and is located between the main body 31 and the bottom wall of the receiving chamber 13. This makes it easier to fix the second flange 43 to the bottom wall of the receiving chamber 13, thereby increasing the range of the deformable stress zone and making it easier to disperse stress.

[0093] In this embodiment, the connection between the main body 41 and the housing body 10 is made more stable by fixing the first flange 42 to the bottom wall of the control compartment 131 and / or by fixing the second flange 43 to the bottom wall of the housing compartment 13, and provides multiple installation options for the main body 41 to adapt to different assembly requirements. The first flange 42 can transfer the stress on the expansion beam 30 to the area of ​​the bottom wall of the control compartment 131 corresponding to the first flange 42, thus dispersing the stress on the expansion beam 30. The second flange 43 serves to support the main body 31 of the expansion beam 30 and transfers the stress on the expansion beam 30 to the area of ​​the bottom wall of the housing compartment 13 corresponding to the second flange 43, thus dispersing the stress on the expansion beam 30 and improving the reliability of the battery device 100.

[0094] Optionally, please continue to see Figure 2 In some embodiments, the reinforcing beam 40 includes a second flange 43, one end of which is away from the body portion 41 and is located between the main body portion 31 and the bottom wall of the receiving chamber 13, and the end of the second flange 43 away from the body portion 41 is spaced apart from the end of the bottom wall of the main body portion 31 away from the body portion 41.

[0095] The end of the second flange 43 away from the main body 41 is spaced apart from the end of the bottom wall of the main body 31 away from the main body 41. This can be understood as the end of the bottom wall of the main body 31 away from the main body 41 extending beyond the end of the second flange 43 away from the main body 41 in the direction from the control chamber 131 to the energy chamber 130.

[0096] This design causes the end of the second flange 43 to retract inward to the bottom wall edge of the main body 31, forming a physical shield. When the battery cell 20 expands, this reduces the risk of the end of the second flange 43 puncturing the battery cell 20. It is understandable that if the end of the second flange 43 extends beyond the bottom wall edge of the main body 31, it will directly interfere with the battery cell 20. Even if the end of the second flange 43 is flush with the bottom wall edge of the main body 31, the expansion beam 30 is prone to deformation under the pressure of the expanding battery cell 20, causing the end of the second flange 43 to temporarily extend beyond the bottom wall edge of the main body 31, posing a risk of puncturing the battery cell 20.

[0097] Optionally, please continue to see Figure 2 In some embodiments, the distance L between the end of the second flange 43 away from the body portion 41 and the end of the bottom wall of the main body portion 31 away from the body portion 41 is 3mm-5mm.

[0098] The distance L between the end of the second flange 43 away from the body part 41 and the end of the bottom wall of the main body part 31 away from the body part 41 can be 3mm, 3.2mm, 3.4mm, 3.5mm, 3.6mm, 3.8mm, 4mm, 4.2mm, 4.4mm, 4.5mm, 4.6mm, 4.8mm or 5mm.

[0099] In this way, the end of the second flange 43 away from the main body 41 is less likely to pierce the battery cell 20 by extending beyond the bottom wall of the main body 31, and the bottom of the expansion beam 30 can be positioned more on the second flange 43 to disperse stress through the second flange 43, reducing the risk of structural deformation caused by stress concentration.

[0100] Optionally, in some embodiments, the reinforcing beam 40 includes a first flange 42, and a plurality of high-pressure control elements 50 are disposed on the surface of the first flange 42 away from the bottom wall of the receiving chamber 13.

[0101] The high-voltage control element 50 can be a high-voltage box or electrical components such as fuses, resistors, high-voltage relays, PCBA (Printed Circuit Board Assembly) boards, etc. In this embodiment, the first flange 42 may have multiple mounting holes to allow the high-voltage control element 50 to be fixedly connected to the first flange 42.

[0102] Thus, the reinforcing beam 40 can provide additional support and protection for the high-voltage control element 50, reducing electrical failures caused by external impacts or internal stresses.

[0103] Optionally, please continue to see Figure 2 In some embodiments, the main body 41 includes a first top wall 410, a first side wall 411, and a second side wall 412; the first top wall 410 is spaced apart from the bottom wall of the receiving chamber 13; one end of the first side wall 411 is connected to the first top wall 410; one end of the second side wall 412 is connected to the first top wall 410; the second side wall 412 is disposed between the first side wall 411 and the main body 31, and abuts against the main body 31; wherein, the reinforcing beam 40 includes a first flange 42 and a second flange 43; the first flange 42 is connected to the end of the first side wall 411 away from the first top wall 410; the second flange 43 is connected to the end of the second side wall 412 away from the first top wall 410.

[0104] The first top wall 410 is the top flat plate structure of the main body 41, serving to support and cover, and providing a top boundary for the internal space of the main body 41. The first side wall 411 and the second side wall 412 are respectively connected to one end of the first top wall 410, serving to enclose and support the structure. The first side wall 411 and the second side wall 412 can be positioned opposite each other at the two ends of the top wall 410, forming the side flat plate structure of the main body 41. One end of the first side wall 411 and the second side wall 412 are respectively connected to the first top wall 410, forming a U-shaped structure. The connection method between them may be welding, bolting, or integral molding, etc.

[0105] The second sidewall 412 abuts against the main body 31. This structure helps to enhance the stability of the overall structure and improve the stress resistance of the expansion beam 30.

[0106] The first flange 42 can increase the contact area at the end of the first side wall 411 and improve the connection strength with the bottom wall of the control compartment 131. The second flange 43, together with the first flange 42, bears the load from the first top wall 410, the first side wall 411 and the second side wall 412, which can improve the stability of the overall structure.

[0107] In this embodiment, the stress on the expansion beam 30 can be dispersed through the paths of the second flange 43, the second side wall 412, the first top wall 410, the first side wall 411, and the first flange 42, thereby improving the stress-bearing capacity of the expansion beam 30. The first top wall 410 and the bottom wall of the receiving compartment 13 form a hollow structure, which reduces weight while maintaining compressive strength. Moreover, this structure of the main body 41 can form a good synergistic effect with other parts of the box body 10, and can jointly resist the influence of external impact and internal stress.

[0108] Alternatively, in some embodiments, please refer to Figure 2 , Figure 4 and Figure 5 The first flange 42 is connected to the side of the first sidewall 411 away from the main body 31. In other embodiments, please refer to... Figure 6 , Figure 8 and Figure 9 The first flange 42 can be connected to the side of the first sidewall 411 closest to the main body 31. Wherein, the first flange 42 is connected to the side of the first sidewall 411 away from the main body 31, which facilitates the fixed connection of the first flange 42 to the bottom wall of the control compartment 131, and can be selected with appropriate size as needed, so that the range of deformable stress zone is larger and more conducive to stress dispersion.

[0109] Alternatively, in some embodiments, please refer to Figure 2 , Figure 6 and Figure 7The second flange 43 is connected to the side of the second sidewall 412 near the main body 31; in other embodiments, please refer to Figure 4 , Figure 9 and Figure 10 The second flange 43 is connected to the side of the second sidewall 412 away from the main body 31. The second flange 43 is connected to the side of the main body 41 near the second sidewall 412, which facilitates the fixed connection of the second flange 43 to the bottom wall of the receiving chamber 13, thereby increasing the range of the deformable stress zone and making it easier to disperse stress.

[0110] Optionally, in some embodiments, the extension 32 and the first top wall 410 are both parallel to the bottom wall of the receiving chamber 13.

[0111] This facilitates the coordination and installation of the various components, and at the same time, it allows the stress on the extension 32 and the first top wall 410 to be more evenly distributed. This is beneficial for the stress on the expansion beam 30 to be transmitted through the extension 32 to the first top wall 410, and then to the first side wall 411, the first flange 42, and even the bottom wall of the control compartment 131.

[0112] Alternatively, in some embodiments, please continue to refer to Figure 2 The extension 32 is detachably connected to the first top wall 410 by fasteners 60, and the first flange 42 and the second flange 43 are both welded to the bottom wall of the receiving chamber 13.

[0113] Fastener 60 refers to a structural component that enables a detachable connection between extension 32 and first top wall 410. In some embodiments, fastener 60 may be a rivet or a screw, or may include a screw and a nut. Extension 32 is riveted to first top wall 410 by rivets, or extension 32 is fixedly connected to first top wall 410 by screws, or screws and nuts.

[0114] The first flange 42 and the second flange 43 are both welded to the bottom wall of the receiving chamber 13, which is convenient for operation.

[0115] In this embodiment, the extension 32 is detachably connected to the first top wall 410 using fasteners 60, facilitating the maintenance and replacement of the reinforcing beam 40 and the expansion beam 30. The first flange 42 and the second flange 43 are connected to the bottom wall of the receiving chamber 13 by welding, simplifying the operation and improving the stability of the connection. Furthermore, both the extension 32 and the first top wall 410 are parallel to the bottom wall of the receiving chamber 13, which reduces the shear force of the fasteners 60, making the connection between the extension 32 and the first top wall 410 more secure.

[0116] Optionally, in some embodiments, please also refer to Figure 11The extension 32 extends further to the surface of the first sidewall 411 away from the second sidewall 412, and the extension 32 is detachably connected to the first sidewall 411 by a fastener 60.

[0117] This increases the contact area between the extension 32 and the expansion beam 30, improves structural redundancy, and enhances the stability and reliability of their connection.

[0118] Optionally, in some embodiments, the reinforcing beam 40 is detachably connected to the expansion beam 30, and the reinforcing beam 40 is welded, glued, or connected to the wall of the control compartment 131 by fasteners 60.

[0119] The detachable connection method can be bolted, snap-fitted, or glued. The detachable connection between the reinforcing beam 40 and the expansion beam 30 facilitates replacement, repair, or adjustment of either beam when needed. The reinforcing beam 40 is connected to the control chamber 131 wall by welding, gluing, or fastener 60. Welding involves melting the reinforcing beam 40 to the control chamber 131 wall at high temperature to form a single unit. This connection method offers high strength and can withstand significant forces and vibrations. Gluing involves using adhesive to bond the reinforcing beam 40 to the control chamber 131 wall. This method is relatively simple, allows for connections between different materials, and provides some sealing, shock absorption, and insulation. Fastener 60 can be screws or include bolts and nuts, connecting the reinforcing beam 40 to the control chamber 131 wall. This connection method offers advantages such as detachability and easy installation, facilitating component adjustment and maintenance.

[0120] In this embodiment, the detachable connection between the reinforcing beam 40 and the expansion beam 30 facilitates their replacement, repair, or adjustment; welding, gluing, or fastener 60 improves the stability of the connection between the reinforcing beam 40 and the bottom wall of the control chamber 131, and the operation is simple.

[0121] Optionally, in some embodiments, the reinforcing beam 40 is a single-piece structure, or the reinforcing beam 40 includes multiple sub-reinforcing beams 400 along its length; please refer to [the relevant documentation]. Figure 12 .

[0122] The reinforcing beam 40 is a one-piece molded structure, which simplifies the manufacturing process. There are no splicing interfaces between the components. When subjected to external forces, the one-piece molded reinforcing beam 40 can distribute stress more evenly, reducing the risk of failure caused by stress concentration at the interface, thus having higher strength and stability.

[0123] like Figure 12As shown, the reinforcing beam 40 includes multiple sub-reinforcing beams 400 along its length. These sub-reinforcing beams 400 can have the same structure or be designed with different shapes and sizes according to different requirements. The sub-reinforcing beams 400 can be combined together by welding, bolting, riveting, etc., to form a complete reinforcing beam 40.

[0124] In this embodiment, the one-piece molded structure has high strength and simplified manufacturing steps; the multiple sub-reinforcing beams 400 facilitate maintenance and replacement and can adapt to complex shapes or segmented load-bearing requirements.

[0125] Optionally, in some embodiments, the reinforcing beam 40 is a metal structural component or a fiber-reinforced resin composite structural component.

[0126] Among them, metal structural components have high strength, are easy to process, and are not easily damaged. Fiber-reinforced resin composite structural components have the characteristics of high strength and low density, which can achieve the purpose of weight reduction and reduce the weight of the reinforcing beam 40.

[0127] Optionally, in some embodiments, please also refer to Figure 13 The main body 31 includes a second top wall 310, a second bottom wall 311, and a third side wall 312 and a fourth side wall 313 connecting the second top wall 310 and the second bottom wall 311; the second top wall 310, the second bottom wall 311, the third side wall 312 and the fourth side wall 313 define a cavity 314; the main body 31 includes a reinforcing member 315 disposed in the cavity 314; the extension 32 is connected to the fourth side wall 313 and is located between the second top wall 310 and the second bottom wall 311.

[0128] The main body 31 has a cavity 314, which facilitates energy absorption by the expansion beam 30 and improves structural strength. The reinforcement 315 can be disposed within the cavity 314. The structural strength of the reinforcement 315 can be greater than or equal to the structural strength of the main body 31. By providing the reinforcement 315 within the cavity 314, the overall structural strength of the expansion beam 30 is improved, which can better bear the expansion force of the battery cell 20.

[0129] The extension 32 is connected to the fourth side wall 313 of the main body 31 and is located between the second top wall 310 and the second bottom wall 311. This changes the force transmission path in the structure, making the force more evenly distributed throughout the structure. When the main body 31 is subjected to external forces, the extension 32 can transfer a portion of the force to the first top wall 410 of the main body 31, reducing excessive forces on local areas of the main body 31, thereby improving the overall load-bearing capacity and reliability of the structure.

[0130] In this embodiment, the cavity 314 facilitates the expansion beam 30 to absorb energy and improve structural strength; the reinforcement 315 can improve the overall structural strength of the expansion beam 30 and better bear the expansion force of the battery cell 20; the extension 32 is connected to the side wall of the main body and is located between the top wall and the bottom wall of the main body, which can change the force transmission path in the structure and make the force more evenly distributed in the entire structure.

[0131] Please see Figure 14 Some embodiments of this application provide an electrical device 1000, which includes a battery device 100. The battery device 100 can be any of the battery devices 100 provided in the foregoing embodiments.

[0132] Electrical equipment 1000 can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. For ease of explanation, the following embodiments use a vehicle as an example for electrical equipment 1000.

[0133] The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle, and the battery device 100 can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, the battery device 100 can serve as the vehicle's operating power source.

[0134] Electrical equipment 1000 may also include an electrical component 200, to which the battery device 100 is electrically connected. The electrical component 200 may be an electrical element or device. The electrical component 200 may be a controller or electronic component, etc. The controller may be a central processing unit (CPU), digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0135] The battery device 100 can be a device capable of providing electrical energy to the electrical device 200. In some embodiments of this application, the battery device 100 can serve not only as the operating power source of the vehicle but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle. Furthermore, the electrical device 1000 can be a vehicle, and the electrical device 200 can be the vehicle's lights (e.g., headlights, taillights, etc.), display screen, dashboard, control system (e.g., controller), etc. The electrical device 1000 may also include other parts, such as a vehicle frame, with both the battery device 100 and the electrical device 200 mounted on the vehicle body.

[0136] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0137] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0138] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A battery device, characterized by, include: The box itself has a storage compartment; An expansion beam includes a main body; the main body is disposed within the receiving chamber, dividing the receiving chamber into an energy chamber and a control chamber. Several individual battery cells are disposed within the energy chamber; The reinforcing beam includes a main body; the main body is disposed inside the control compartment, fixedly connected to the wall of the receiving compartment, and abuts against the main body; The expansion beam further includes an extension disposed within the control compartment; the extension is connected to the main body and at least partially abuts against the top surface of the main body.

2. The battery device according to claim 1, characterized in that, The reinforcing beam also includes: A first flange is connected to the side of the body portion away from the main body portion and is fixedly connected to the bottom wall of the control compartment; and / or The second flange is connected to the side of the body portion near the main body portion, and is disposed between the main body portion and the bottom wall of the receiving compartment, and is fixedly connected to the bottom wall of the receiving compartment.

3. The battery device according to claim 2, characterized in that, The reinforcing beam includes a second flange, one end of which is away from the main body and located between the main body and the bottom wall of the receiving compartment, and the end of the second flange away from the main body and the end of the bottom wall of the main body away from the main body are spaced apart.

4. The battery device according to claim 3, characterized in that, The distance between the end of the second flange away from the body and the end of the bottom wall of the body away from the body is 3mm-5mm.

5. The battery device according to claim 2, characterized in that, The reinforcing beam includes the first flange, and a plurality of high-pressure control elements are provided on the surface of the first flange away from the bottom wall of the accommodating chamber.

6. The battery device according to claim 2, characterized in that, The body portion includes: The first top wall is spaced apart from the bottom wall of the receiving chamber; The first sidewall is connected at one end to the first top wall; The second sidewall is connected at one end to the first top wall; the second sidewall is disposed between the first sidewall and the main body and abuts against the main body; The reinforcing beam includes a first flange and a second flange; the first flange is connected to the end of the first sidewall away from the first top wall; the second flange is connected to the end of the second sidewall away from the first top wall.

7. The battery device according to claim 6, characterized in that, Both the extension and the first top wall are parallel to the bottom wall of the receiving compartment.

8. The battery device according to claim 6, characterized in that, The extension is detachably connected to the first top wall by fasteners, and both the first flange and the second flange are welded to the bottom wall of the receiving chamber.

9. The battery device according to claim 6, characterized in that, The extension extends further to the surface of the first sidewall away from the second sidewall, and the extension is detachably connected to the first sidewall by fasteners.

10. The battery device according to any one of claims 1-7, characterized in that, The reinforcing beam is detachably connected to the expansion beam, and the reinforcing beam is welded, glued, or connected to the wall of the control compartment by fasteners.

11. The battery device according to any one of claims 1-7, characterized in that, The reinforcing beam is a one-piece molded structure, or the reinforcing beam includes multiple sub-reinforcing beams along its length.

12. The battery device according to any one of claims 1-7, characterized in that, The reinforcing beam is a metal structural component or a fiber-reinforced resin composite structural component.

13. The battery device according to any one of claims 1-7, characterized in that, The main body includes: The second top wall and the second bottom wall are arranged opposite to each other and spaced apart. The third and fourth sidewalls are respectively connected to the second top wall and the second bottom wall; the second top wall, the second bottom wall, the third sidewall, and the fourth sidewall define a cavity; The reinforcing component is disposed within the cavity; The extension is connected to the fourth sidewall and is located between the second top wall and the second bottom wall.

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

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