Battery device and electric device

Abstract

The battery device comprises a box body and a battery monomer assembly, the battery monomer assembly is arranged in the box body, the box body comprises a first beam, the first beam is positioned on one side of the battery monomer assembly along a first direction, and the first beam comprises a first beam body and a second beam body which are connected with each other; the first beam body and the second beam body are independently formed parts, the first beam body and the second beam body are arranged in the height direction of the first beam, a part of the first beam body and a part of the second beam body are overlapped and connected in the first direction, and the first direction is perpendicular to the height direction of the first beam. According to the battery device disclosed by the utility model, the height of the first beam can be adjusted during manufacturing, so that the battery device is suitable for battery devices with different specifications.

Description

Battery devices and electrical appliances Technical Field

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

[0002] The battery pack casing varies in size depending on the specifications of the battery pack. The casing is constructed using beams, and different sized casings require beams of varying heights during manufacturing. Currently, the height of the beam structure is fixed, resulting in poor beam versatility. Furthermore, different molds are needed to manufacture beams of different heights, leading to high manufacturing costs for the battery pack. Therefore, improvements are needed. Summary of the Invention

[0003] In view of the above problems, the present invention provides a battery device and an electrical device, wherein the height of the first beam can be adjusted during manufacturing to accommodate battery devices of different specifications.

[0004] In a first aspect, the present invention provides a battery device, including a housing and a battery cell assembly, wherein the battery cell assembly is disposed within the housing, the housing includes a first beam located on one side of the battery cell assembly along a first direction, the first beam including a first beam body and a second beam body connected together, the first beam body and the second beam body being independently molded parts, the first beam body and the second beam body being arranged along the height direction of the first beam; portions of the first beam body and portions of the second beam body are stacked and connected along the first direction, the first direction being perpendicular to the height direction of the first beam.

[0005] In the above technical solution, the first beam of the housing is configured to include a first beam body and a second beam body arranged along the height direction of the first beam body. The first beam body and the second beam body are both independently molded parts. Parts of the first beam body and parts of the second beam body are stacked and connected along the first direction, so that the relative position of the first beam body and the second beam body in the height direction can be adjusted during the assembly process, and the height of the first beam body can be adjusted during manufacturing, which is suitable for battery devices of different specifications.

[0006] In some embodiments, the first beam includes a first body and a first extension wall extending downward from the first body, and the second beam includes a second body and a second extension wall extending upward from the second body, wherein the first extension wall and the second extension wall are at least partially overlapped and connected in the first direction.

[0007] In the above technical solution, the first extension wall and the second extension wall are at least partially stacked and connected in the first direction. During the assembly process, the height of the stacked part is adjustable by adjusting the relative position of the first extension wall and the second extension wall in the height direction, thereby adjusting the height of the first beam.

[0008] In some embodiments, the first extension wall is located on the side of the second extension wall closer to the housing, and a mating groove is formed on the side of the first extension wall facing the second extension wall, with at least a portion of the second extension wall located within the mating groove.

[0009] In the above technical solution, a mating groove is formed on the side of the first extension wall facing the second extension wall, and at least a portion of the second extension wall is located in the mating groove, thereby reducing the thickness of the second extension wall protruding relative to the first extension wall and improving the flatness of the surface of the first beam.

[0010] In some embodiments, in a first direction, the surface of the second extension wall facing out of the box body is a first surface, and the surface of the first beam facing out of the box body is a second surface, with the first surface and the second surface being flush.

[0011] In the above technical solution, the first surface and the second surface are flush, making the surface of the first beam flat and facilitating the connection of the first beam with other components.

[0012] In some embodiments, at least one of the first body and the second body is a hollow structure.

[0013] In the above technical solution, at least one of the first and second main bodies is a hollow structure. The hollow structure retains strength and rigidity while being lightweight, making it particularly suitable for scenarios that require a balance between "sturdiness" and "lightness". The air layer can block heat conduction and reduce noise. The hollow structure reduces the amount of material used, achieving "replacing materials with structure".

[0014] In some embodiments, both the first beam and the second beam are formed by bending a metal plate structure.

[0015] In the above technical solution, both the first beam and the second beam are formed by bending metal plate structures, which allows the first beam and the second beam to be manufactured using the same mold, saving mold costs, reducing costs, shortening the battery device R&D and manufacturing cycle, and increasing production line utilization.

[0016] In some embodiments, the first beam and the second beam together form a slot, the opening of the slot facing the interior of the box along a first direction, the enclosure of the slot including a first portion, the first portion being disposed opposite to the opening along the first direction; the box further includes a mounting beam, the mounting beam being located on the side of the first beam facing the exterior of the box along the first direction, the mounting beam being welded to the first portion.

[0017] In the above technical solution, the slotted design allows the mounting beam to be welded to the first part of the first beam without the need for additional processes such as punching, tapping, or welding nuts.

[0018] In some embodiments, the first beam includes a first body and a first extension wall extending downward from the first body, and the second beam includes a second body and a second extension wall extending upward from the second body. The first extension wall and the second extension wall are at least partially stacked and connected in the first direction. The first extension wall is located on the side of the first body away from the interior of the box along the first direction, and the second extension wall is located on the side of the second body away from the interior of the box along the first direction. The first extension wall and the second extension wall together form the first portion, and the first body and the second body form a partial enclosure of the slot.

[0019] In the above technical solution, the first extension wall and the second extension wall are at least partially stacked and connected in the first direction. The relative position of the first extension wall and the second extension wall in the height direction is adjustable during the assembly process so that the height dimension of the stacked part is adjustable, thereby adjusting the height dimension of the first beam. The first extension wall and the second extension wall together form the first part, thereby increasing the structural strength of the first part.

[0020] In some embodiments, the mounting beam includes a mounting portion and a first flange edge connected to the mounting portion. The first flange edge and the mounting portion are disposed along the height direction of the first beam, and the first flange edge is fitted and welded to the first portion.

[0021] In the above technical solution, the first flange edge is fitted and welded to the first part, which increases the welding operation area; the gap between the first flange edge and the first part is reduced, which reduces the probability of a false weld between the first flange edge and the first part.

[0022] In some embodiments, the weld point where the mounting beam is welded to the first portion is formed by the combined melting and solidification of a portion of the first flange edge, a portion of the first extension wall, and a portion of the second extension wall.

[0023] In the above technical solution, the weld point is formed by the melting and solidification of the first flange edge, the first extension wall, and the second extension wall together, which can connect the first flange edge, the first extension wall, and the second extension wall in one welding, reducing processing steps.

[0024] In some embodiments, the mounting beam further includes a second flange edge, which is connected to the mounting portion. The second flange edge and the mounting portion are arranged along the height direction of the first beam, and the second flange edge is welded to the second main body.

[0025] In the above technical solution, the second flange edge is welded to the second main body, so that in addition to the connection between the first flange edge and the first part, the first beam and the first beam also have the welded connection between the second flange edge and the second main body, which enhances the connection strength between the load-bearing beam and the first beam.

[0026] In some embodiments, the battery device further includes a reinforcing beam received within the slot.

[0027] In the above technical solution, the reinforcing beam solves the problem of reduced structural strength of the first beam due to the formation of slots, and enhances the structural strength of the first beam.

[0028] In some embodiments, a third cavity is formed inside the reinforcing beam.

[0029] In the above technical solution, a third cavity is provided inside the strengthening beam. The third cavity retains strength and stiffness while being lightweight, which is especially suitable for scenarios that need to balance "robustness" and "lightness". The air layer can block heat conduction and reduce noise. The third cavity reduces the amount of material used, realizing "replacing materials with structure".

[0030] In some embodiments, the reinforcing beam includes a body and a support plate, the third cavity is formed within the body, the support plate is located within the third cavity and extends along the height direction of the first beam, and the two ends of the support plate along the height direction of the first beam are fixedly connected to the body.

[0031] In the above technical solution, the support plate is located in the third cavity and extends along the height direction of the first beam. The two ends of the support plate along the height direction of the first beam are fixedly connected to the body, thereby increasing the structural strength of the reinforcing beam.

[0032] In some embodiments, the difference between the dimension of the slot along the height direction and the dimension of the reinforcing beam along the height direction is in the range of 0.5-1 mm; and / or, the first beam protrudes into the housing relative to the reinforcing beam, and the first beam abuts against the battery cell assembly.

[0033] In the above technical solution, the difference between the dimension of the slot along the height direction and the dimension of the reinforcing beam along the height direction is 0.5-1mm. The slot and the reinforcing beam are fitted with a clearance, which can absorb the assembly tolerance of the reinforcing beam and the first beam, and reduce the machining dimensional accuracy requirements of the reinforcing beam and the first beam. The first beam protrudes into the box relative to the reinforcing beam and abuts against the battery cell assembly. When the battery device is hit by a collision from outside the box, the impact force first acts on the first beam, and after the first beam is locally deformed, it acts on the reinforcing beam. The first beam and the reinforcing beam are crushed progressively, which prolongs the energy absorption time.

[0034] In some embodiments, at least a portion of the outer surface of the first beam is provided with an anti-corrosion layer.

[0035] In the above technical solution, by setting an anti-corrosion layer on the surface of the first beam, the anti-corrosion layer completely isolates the internal material of the first beam from external oxygen, moisture and corrosive media, thus preventing the occurrence of corrosion reaction.

[0036] Secondly, the present invention provides an electrical device, comprising: a battery device according to an embodiment of the first aspect of the present invention.

[0037] In the above technical solution, the electrical device includes a battery device according to the first aspect of the present invention. The first beam of the housing is configured to include a first beam body and a second beam body arranged along the height direction of the first beam body. The first beam body and the second beam body are both independently molded parts. A portion of the first beam body and a portion of the second beam body are stacked and connected along a first direction, so that the relative position of the first beam body and the second beam body in the height direction is adjustable during the assembly process, and the height of the first beam body can be adjusted during manufacturing, making it suitable for battery devices of different specifications.

[0038] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0039] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0040] Figure 1 is an exploded view of a battery device according to some embodiments of the present invention;

[0041] Figure 2 is a perspective view of the frame of the battery device in Figure 1;

[0042] Figure 3 is a partial three-dimensional view of the frame in Figure 2;

[0043] Figure 4 is a partial structural exploded view of the frame in Figure 3;

[0044] Figure 5 is a cross-sectional view of the frame in Figure 2 during the assembly process;

[0045] Figure 6 is an enlarged view of point A in the frame of Figure 5;

[0046] Figure 7 is a partial structural cross-sectional view of the frame in Figure 2;

[0047] Figure 8 is a schematic diagram of an electrical device according to some embodiments of the present invention.

[0048] Figure label:

[0049] 1000. Electrical appliances;

[0050] 100. Battery assembly; 50. Frame; 10. First beam; 11. First beam body; 110. First main body; 1101. First cavity; 111. First extension wall; 112. Fitting groove; 12. Second beam body; 120. Second main body; 1201. Second cavity; 1202. Clearance hole; 121. Second extension wall; 13. Slot; 130. Opening; 131. First part; 14. Weld point; 20. Mounting beam; 21. Mounting part; 22. First flange edge; 23. Second flange edge; 30. Reinforcing beam; 31. Body; 310. Third cavity; 32. Support plate; 40. Side beam; 60. Battery cell assembly; 70. Box; 71. First box; 72. Second box; 200. Vehicle body. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0052] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order or hierarchy.

[0053] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. 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 mutually exclusive with other embodiments.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "attachment," 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this invention, 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 invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0056] In the embodiments of this utility model, 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 utility model shown in the 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 utility model.

[0057] In this utility model, "multiple" refers to two or more.

[0058] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and 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.

[0059] In the embodiments of this utility model, unless otherwise specified, all embodiments and optional embodiments of this utility model can be combined with each other to form new technical solutions.

[0060] In the embodiments of this utility model, unless otherwise specified, all technical features and optional technical features of this utility model can be combined with each other to form new technical solutions.

[0061] In embodiments of this invention, the battery device may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar. For example, a battery cell assembly is typically formed by arranging multiple battery cells; a battery cell assembly may also be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module may be formed by bundling multiple battery cells together with cable ties.

[0062] The battery device can be a battery pack, which includes a housing and one or more individual battery cells housed within the housing. The individual battery cells can be battery modules, which can be housed within the housing by fixing the battery modules to the housing; alternatively, multiple individual battery cells can be housed within the housing by directly fixing them to the housing.

[0063] In embodiments of this application, the housing may include a first housing and a second housing. The first housing and the second housing are fastened together to form a closed space inside the housing for housing individual battery cells. Here, "closed" refers to covering or shutting down; it can be sealed or unsealed. The first housing may be a top cover or a bottom plate. For example, the housing may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, forming a closed space inside the housing for housing individual battery cells.

[0064] In embodiments of this application, the housing can be part of the vehicle's chassis structure. For example, a portion of the housing can be at least a part of the vehicle's floor, or a portion of the housing can be at least a part of the vehicle's crossbeams and longitudinal beams.

[0065] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0066] During battery production, the battery casing varies in size depending on the specifications of the battery unit. The casing is constructed using beams, and different sized casings require beams of varying heights during manufacturing. However, the existing beam structures have fixed heights, resulting in poor versatility. Furthermore, different molds are needed to manufacture beams of varying heights, leading to high manufacturing costs for battery units.

[0067] To enable the height of the beam to be adjusted during manufacturing and to accommodate battery devices of different specifications, this application provides a battery device including a housing and a battery cell assembly. The battery cell assembly is disposed within the housing. The housing includes a first beam located on one side of the battery cell assembly along a first direction. The first beam includes a first beam body and a second beam body connected together. Both the first beam body and the second beam body are independently molded parts. The first beam body and the second beam body are arranged along the height direction of the first beam. A portion of the first beam body and a portion of the second beam body are stacked and connected along the first direction, which is perpendicular to the height direction of the first beam.

[0068] In the above technical solution, the first beam of the housing is configured to include a first beam body and a second beam body arranged along the height direction of the first beam body. The first beam body and the second beam body are both independently molded parts. Parts of the first beam body and parts of the second beam body are stacked and connected along the first direction, so that the relative position of the first beam body and the second beam body in the height direction can be adjusted during the assembly process, and the height of the first beam body can be adjusted during manufacturing, which is suitable for battery devices of different specifications.

[0069] The battery device disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are 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.

[0070] The electrical devices disclosed in this application can be gasoline-powered vehicles, natural gas-powered vehicles, or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device is installed inside the vehicle, and the battery device can be located at the bottom, front, or rear of the vehicle. The battery device can be used to power the vehicle; for example, the battery device can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor. The controller is used to control the battery device to supply power to the motor, for example, for the vehicle's starting, navigation, and operating power needs. In some embodiments of this application, the battery device can not only serve as the vehicle's operating power source but also as the vehicle's drive power source, replacing or partially replacing gasoline or natural gas to provide driving power for the vehicle.

[0071] The battery device and power supply device according to embodiments of the present invention are described below with reference to Figures 1-8.

[0072] Referring to Figures 1-4, in a first aspect, this utility model provides a battery device 100, including a housing 70 and a battery cell assembly 60. The battery cell assembly 60 is disposed within the housing 70. The housing 70 includes a first beam 10, which includes a first beam body 11 and a second beam body 12 connected together. The first beam body 11 and the second beam body 12 are both independently molded parts. The first beam body 11 and the second beam body 12 are arranged along the height direction of the first beam 10. A portion of the first beam body 11 and a portion of the second beam body 12 are stacked and connected along a first direction, which is perpendicular to the height direction of the first beam 10.

[0073] The housing 70 is used to store the individual battery cells 60.

[0074] For example, referring to Figure 1, the housing 70 includes a first housing 71 and a second housing 72. The first housing 71 and the second housing 72 are fastened together to form a closed space inside the housing 70 to house the battery cell assembly 60.

[0075] For example, referring to Figure 2, the housing 70 may also include a frame 50, with the first beam 10 being part of the frame 50. The frame 50 also includes two side beams 40. There are two first beams 10, and the two first beams 10 and the two side beams 40 together form the frame 50, which is used to house the battery cell assembly 60.

[0076] Referring to Figure 3, the first direction is the X direction in the figure, the height direction of the first beam 10 is the Z direction in the figure, and the length direction of the first beam 10 is the Y direction in the figure. The Y, X, and Z directions can be perpendicular to each other.

[0077] Since the first beam 11 and the second beam 12 are both independently molded parts, during the assembly process of the first beam 10, the first beam 11 and the second beam 12 are set along the height direction of the first beam 10. Parts of the first beam 11 and parts of the second beam 12 are stacked along the first direction. By adjusting the position of the first beam 11 and the second beam 12 in the height direction, the height of the stacked part can be adjusted, thereby adjusting the height dimension of the first beam 10. This allows the first beam 11 and the second beam 12 of the same batch to be manufactured into first beams 10 with different height dimensions to be suitable for boxes 70 of different sizes.

[0078] In the above technical solution, the first beam 10 of the housing 70 is configured to include a first beam 11 and a second beam 12 arranged along the height direction of the first beam 10. The first beam 11 and the second beam 12 are both independently molded parts. Parts of the first beam 11 and the second beam 12 are stacked and connected along the first direction, so that the relative position of the first beam 11 and the second beam 12 in the height direction can be adjusted during the assembly process, and the height of the first beam 10 can be adjusted during manufacturing, which is suitable for battery devices 100 of different specifications.

[0079] In some embodiments, referring to FIG4 and FIG5, the first beam 11 includes a first body 110 and a first extension wall 111 extending downward from the first body 110, and the second beam 12 includes a second body 120 and a second extension wall 121 extending upward from the second body 120. The first extension wall 111 and the second extension wall 121 are at least partially stacked and connected in a first direction.

[0080] For example, the first main body 110 has a cuboid structure, and the first extension wall 111 extends downward from the side of the first main body 110 near the outside of the box 70. The first extension wall 111 has a flat plate structure. The second main body 120 has a cuboid structure, and the second extension wall 121 extends upward from the side of the second main body 120 near the outside of the box 70. The second extension wall 121 has a flat plate structure.

[0081] In the above technical solution, the first extension wall 111 and the second extension wall 121 are at least partially stacked and connected in the first direction. During the assembly process, the height dimension of the stacked part is adjustable by adjusting the relative position of the first extension wall 111 and the second extension wall 121 in the height direction, thereby adjusting the height dimension of the first beam 10.

[0082] In some embodiments, referring to FIG4 and FIG5, the first extension wall 111 is located on the side of the second extension wall 121 near the housing 70, and a mating groove 112 is formed on the side of the first extension wall 111 facing the second extension wall 121, and at least a portion of the second extension wall 121 is located in the mating groove 112.

[0083] In the above technical solution, a mating groove 112 is formed on the side of the first extension wall 111 facing the second extension wall 121, and at least a portion of the second extension wall 121 is located in the mating groove 112, thereby reducing the thickness of the second extension wall 121 protruding relative to the first extension wall 111 and improving the surface flatness of the first beam 11.

[0084] In some embodiments, referring to Figures 4 to 6, in a first direction, the surface of the second extension wall 121 facing outward from the box 70 is the first surface, and the surface of the first beam 11 facing outward from the box 70 is the second surface, with the first surface and the second surface being flush.

[0085] In the above technical solution, the first surface and the second surface are flush, so that the surface of the first beam 10 is flat, which facilitates the connection of the first beam 10 with other components.

[0086] In some embodiments, referring to Figures 3 and 4, at least one of the first body 110 and the second body 120 is a hollow structure.

[0087] For example, both the first body 110 and the second body 120 are hollow structures, with a first cavity 1101 formed inside the first body 110 and a second cavity 1201 formed inside the second body 120.

[0088] In the above technical solution, at least one of the first main body 110 and the second main body 120 is a hollow structure. The hollow structure retains strength and rigidity while being lightweight, making it particularly suitable for scenarios that require a balance between "sturdiness" and "lightness". The air layer can block heat conduction and reduce noise. The hollow structure reduces the amount of material used, achieving "replacing materials with structure".

[0089] In some embodiments, referring to Figures 3 and 4, both the first beam 11 and the second beam 12 are formed by bending a metal plate structure.

[0090] Metal sheet structures can be manufactured using a roll forming process. Roll forming offers high production efficiency, is suitable for large-scale mass production, produces high-precision products with good dimensional consistency, high material utilization, and low overall cost; furthermore, it optimizes material properties and improves product reliability.

[0091] Roll forming is a processing method that applies pressure to materials using one or more pairs of rollers, causing them to undergo plastic deformation to obtain the desired shape, size, or properties. Roll forming offers high production efficiency, is suitable for large-scale mass production, produces high-precision products with good dimensional consistency, high material utilization, and low overall cost; it also optimizes material properties and improves product reliability. Spot welding lines can be directly connected in series with roll forming lines, matching their cycle times. A single spot welding robot can meet a production speed of 30-40 JPH, matching mainstream spot welding lines.

[0092] In the above technical solution, both the first beam 11 and the second beam 12 are formed by bending metal plate structures, so that the first beam 11 and the second beam 12 can be manufactured using the same mold, saving mold costs and reducing costs; the battery device 100 has a short R&D and manufacturing cycle and a high production line utilization rate.

[0093] In some embodiments, referring to FIG5, the first beam 11 and the second beam 12 together form a slot 13, the opening 130 of the slot 13 faces the interior of the box 70 along a first direction, and the wall of the slot 13 includes a first portion 131, which is disposed opposite to the opening 130 along the first direction; the box 70 also includes a mounting beam 20, which is located on the side of the first beam 10 facing the exterior of the box 70 along the first direction, and the mounting beam 20 is welded to the first portion 131.

[0094] The mounting beam 20 is used to fix the battery device 100 and to transfer loads.

[0095] For example, when the electrical device 1000 is a car, the mounting beam 20 connects the battery pack 70 to the vehicle body (such as the frame or chassis longitudinal beams), fixing the entire battery pack 100 to the vehicle body using bolts, welding, or other methods. This reduces the displacement and shaking of the battery pack 100 during vehicle movement (acceleration, braking, turning) or bumpy conditions. The longitudinal (acceleration / braking), lateral (turning), and vertical (bumpy) loads generated during vehicle movement, as well as the impact loads during collisions, are all transferred to the vehicle frame through the mounting beam 20, reducing the risk of the battery pack 100 being damaged by concentrated stress. In the event of a frontal, side, or bottom collision, the mounting beam 20 acts as an "energy-absorbing / impact-resistant structure," dispersing the collision force and reducing the risk of the battery cell assembly 60 being crushed or punctured, thus reducing the probability of short circuits and fires. The mounting beam 20 is welded and fixed to the first beam 10 to form an integral structure, improving the overall rigidity and torsional resistance of the battery pack 100.

[0096] Optionally, the mounting beam 20 and the first beam 10 can be connected by spot welding.

[0097] Spot welding is a resistance welding process that utilizes the resistance heat generated by current passing through the contact point of two workpieces to heat the metal at the contact point to a molten or plastic state. Pressure is then applied through electrodes to fuse the workpieces together, forming a weld. The core heating temperature of spot welding is concentrated in the molten nugget region at the workpiece contact point, typically between 950℃ and 1450℃ (depending on the base material). The heat is highly concentrated at the contact point (molten nugget region), and the temperature drops rapidly with distance from the nugget (the heat-affected zone temperature is typically between 200℃ and 500℃). Therefore, the thermal deformation of spot welding is minimal; the temperature of spot welding is much lower than that of arc welding. Spot welding features concentrated heating, short heating time, and a small heat-affected zone (only 3-5mm). This results in high welding quality between the mounting beam 20 and the first beam 10, improving the reliability of the battery device 100.

[0098] The slot 13 can avoid the operation space for welding the mounting beam 20 to the first part 131.

[0099] In the above technical solution, the slot 13 enables the mounting beam 20 and the first beam 10 to be welded together without the need for additional punching, tapping or welding of nuts.

[0100] In some embodiments, referring to Figures 4 and 5, the first beam 11 includes a first body 110 and a first extension wall 111 extending downward from the first body 110, and the second beam 12 includes a second body 120 and a second extension wall 121 extending upward from the second body 120. The first extension wall 111 and the second extension wall 121 are at least partially stacked and connected in a first direction. The first extension wall 111 is located on the side of the first body 110 away from the interior of the box 70 along the first direction, and the second extension wall 121 is located on the side of the second body 120 away from the interior of the box 70 along the first direction. The first extension wall 111 and the second extension wall 121 together form a first portion 131, and the first body 110 and the second body 120 form a partial enclosure of the slot 13.

[0101] In the above technical solution, the first extension wall 111 and the second extension wall 121 are at least partially stacked and connected in the first direction. The relative position of the first extension wall 111 and the second extension wall 121 in the height direction is adjustable during the assembly process, so that the height dimension of the stacked part is adjustable, thereby adjusting the height dimension of the first beam 10. The first extension wall 111 and the second extension wall 121 together constitute the first part 131, thereby increasing the structural strength of the first part 131.

[0102] In some embodiments, referring to Figures 4 and 5, the mounting beam 20 includes a mounting portion 21 and a first flange edge 22 connected to the mounting portion 21. The first flange edge 22 and the mounting portion 21 are arranged along the height direction of the first beam 10. The first flange edge 22 is fitted and welded to the first portion 131.

[0103] For example, the first flange edge 22 extends from the mounting portion 21 near the first beam 10. The first flange edge 22 is a flat plate structure, and its position in the height direction of the first beam 10 corresponds to the first portion 131. The first flange edge 22 is in contact with the first surface of the second extension wall 121 and the second surface of the first beam body 11. The first flange edge 22 is not easily deformed when it is touched by the welding torch, thus improving the welding quality.

[0104] In the above technical solution, the first flange edge 22 is fitted and welded to the first part 131, which increases the welding operation area; the gap between the first flange edge 22 and the first part 131 is reduced, which reduces the probability of a false weld between the first flange edge 22 and the first part 131.

[0105] In some embodiments, referring to Figures 4 and 5, the weld point 14 where the mounting beam 20 is welded to the first portion 131 is formed by the melting and solidification of a portion of the first flange edge 22, a portion of the first extension wall 111, and a portion of the second extension wall 121.

[0106] In the above technical solution, the weld point 14 is formed by the melting and solidification of a portion of the first flange edge 22, a portion of the first extension wall 111, and a portion of the second extension wall 121. The first flange edge 22, the first extension wall 111, and the second extension wall 121 can be connected simultaneously in one welding operation, reducing processing steps.

[0107] In some embodiments, referring to Figures 3 and 4, the mounting beam 20 further includes a second flange edge 23, which is connected to the mounting part 21. The second flange edge 23 and the mounting part 21 are arranged along the height direction of the first beam 10, and the second flange edge 23 is welded to the second body 120.

[0108] For example, the second flange edge 23 extends from the side of the mounting portion 21 near the first beam 10. The second flange edge 23 and the first flange edge 22 are symmetrically arranged about the mounting portion 21. The second flange edge 23 is a flat plate structure, and the second flange edge 23 and the first flange edge 22 are located on the same plane.

[0109] The second flange edge 23 and the second body 120 can be connected by spot welding.

[0110] For example, referring to Figure 3, the second body 120 is provided with a clearance hole 1202. The clearance hole 1202 is disposed opposite to the second extension wall 121 in the first direction. The clearance hole 1202 is used for the welding torch to extend into the second body 120 so that the second flange edge 23 is welded to the second body 120. That is, the clearance hole 1202 provides space for the welding torch to operate.

[0111] In the above technical solution, the second flange edge 23 is welded to the second body 120, so that in addition to the connection between the first flange edge 22 and the first part 131, the first beam 10 also has the connection between the second flange edge 23 and the second body 120, which enhances the connection strength between the load beam 20 and the first beam 10.

[0112] In some embodiments, referring to FIG7, the battery device 100 further includes a reinforcing beam 30, which is received in the slot 13.

[0113] The reinforcing beam 30 can be fixed to the first beam 11 and the second beam 12 by means of plug welding, adhesive bonding, self-piercing riveting, or bolt connection. Referring to Figure 6, during the battery equipment manufacturing process, the first extension wall 111 and the second extension wall 121 can be welded first, then the first flange edge 22 can be welded to the first extension wall 111 and the second extension wall 121, and finally the reinforcing beam 30 can be fixed. Alternatively, the first extension wall 111, the second extension wall 121, and the first flange edge 22 can be welded together first, and then the reinforcing beam 30 can be fixed.

[0114] In the above technical solution, the reinforcing beam 30 solves the problem of reduced structural strength of the first beam 10 due to the formation of the slot 13, and the reinforcing beam 30 enhances the structural strength of the first beam 10.

[0115] In some embodiments, referring to FIG4, a third cavity 310 is formed inside the reinforcing beam 30.

[0116] For example, the reinforcing beam 30 is a cuboid in shape, and the reinforcing beam 30 has a third cavity 310 to form a thin-walled structure, thereby reducing the weight of the reinforcing beam 30.

[0117] In the above technical solution, a third cavity 310 is formed inside the reinforcing beam 30. The third cavity 310 retains strength and rigidity while being lightweight, making it particularly suitable for scenarios that require a balance between "robustness" and "lightness". The air layer can block heat conduction and reduce noise. The hollow structure reduces the amount of material used, realizing "replacing materials with structure".

[0118] In some embodiments, referring to FIG4, the reinforcing beam 30 includes a body 31 and a support plate 32. A third cavity 310 is formed in the body 31. The support plate 32 is located in the third cavity 310 and extends along the height direction of the first beam 10. The two ends of the support plate 32 along the height direction of the first beam 10 are fixedly connected to the body 31.

[0119] For example, the support plate 32 is a flat plate structure, with its two ends connected to the top and bottom of the body 31, respectively. Optionally, the support plate 32 is integrally formed with the body 31. The support plate 32 is located on the axis of the body 31, so that the supporting force of the support plate 32 on the body 31 is evenly distributed.

[0120] In the above technical solution, the support plate 32 is located in the third cavity 310 and extends along the height direction of the first beam 10. The two ends of the support plate 32 along the height direction of the first beam 10 are fixedly connected to the body 31. The support plate 32 increases the structural strength of the reinforcing beam 30.

[0121] In some embodiments, referring to Figures 5 to 7, the difference between the dimension of the slot 13 along the height direction and the dimension of the reinforcing beam 30 along the height direction ranges from 0.5 to 1 mm.

[0122] The difference between the dimension of the slot 13 along the height direction and the dimension of the reinforcing beam 30 along the height direction can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm or 1mm.

[0123] In the above technical solution, the difference between the dimension of the slot 13 along the height direction and the dimension of the reinforcing beam 30 along the height direction is 0.5-1mm. The slot 13 and the reinforcing beam 30 are clearance-fitted. The clearance can absorb the assembly tolerance of the reinforcing beam 30 and the first beam 10, and reduce the machining dimensional accuracy requirements of the reinforcing beam 30 and the first beam 10.

[0124] In some embodiments, referring to FIG7, the first beam 10 protrudes into the housing 70 relative to the reinforcing beam 30, and the first beam 10 abuts against the battery cell assembly 60.

[0125] In the above technical solution, the first beam 10 protrudes into the housing 70 relative to the reinforcing beam 30, and the first beam 10 abuts against the battery cell assembly 60. When the battery device 100 is subjected to a collision from outside the housing 70, the collision force first acts on the first beam 10, and after the first beam 10 is partially deformed, it acts on the reinforcing beam 30. The first beam 10 and the reinforcing beam 30 are crushed in a progressive manner, which prolongs the energy absorption time.

[0126] In some embodiments, referring to FIG2, at least a portion of the outer surface of the first beam 10 is provided with an anti-corrosion layer.

[0127] The anti-corrosion layer can be a zinc coating. Zinc is more chemically active than iron. When the zinc layer is locally damaged (such as by scratches), the zinc will preferentially oxidize (sacrificing itself) to protect the underlying steel from corrosion (this characteristic is called "cathode protection"). Even if the coating is damaged, it can continue to prevent rust.

[0128] In the above technical solution, by setting an anti-corrosion layer on the first beam 10, the anti-corrosion layer completely isolates the steel from external oxygen, moisture and corrosive media, thus blocking the occurrence of corrosion reaction.

[0129] Referring to FIG8, in a second aspect, the present invention provides an electrical device 1000, comprising: a battery device 100 according to an embodiment of the first aspect of the present invention.

[0130] The electrical device 1000 can be a vehicle, and the battery device 100 can be installed at the bottom of the vehicle body 200.

[0131] In the above technical solution, the power device 1000 is equipped with the battery device 100, and the height of the first beam 10 of the battery device 100 can be adjusted during the manufacturing process.

[0132] The battery device 100 according to some embodiments of the present invention is described below with reference to Figures 1-7.

[0133] In this embodiment, the battery device 100 includes a housing 70 and a battery cell assembly 60. The battery cell assembly 60 is disposed inside the housing 70. The housing 70 includes a first beam 10. The first beam 10 includes a first beam body 11 and a second beam body 12 connected together. The first beam body 11 and the second beam body 12 are both independently molded parts. The first beam body 11 and the second beam body 12 are arranged along the height direction of the first beam 10. A portion of the first beam body 11 and a portion of the second beam body 12 are stacked and connected along a first direction, which is perpendicular to the height direction of the first beam 10.

[0134] The first beam 11 includes a first main body 110 and a first extension wall 111 extending downward from the first main body 110. The second beam 12 includes a second main body 120 and a second extension wall 121 extending upward from the second main body 120. The first extension wall 111 and the second extension wall 121 are at least partially stacked and connected in a first direction. The first extension wall 111 is located on the side of the second extension wall 121 closer to the inside of the housing 70. A mating groove 112 is formed on the side of the first extension wall 111 facing the second extension wall 121, and at least a portion of the second extension wall 121 is located within the mating groove 112. In the first direction, the surface of the second extension wall 121 facing out of the housing 70 is a first surface, and the surface of the first beam 11 facing out of the housing 70 is a second surface. The first surface and the second surface are flush. At least one of the first main body 110 and the second main body 120 is a hollow structure.

[0135] Both the first beam 11 and the second beam 12 are formed by bending metal plate structures.

[0136] The first beam 11 and the second beam 12 together form a slot 13. The opening 130 of the slot 13 faces the interior of the box 70 along a first direction. The wall of the slot 13 includes a first part 131, which is arranged opposite to the opening 130 along the first direction. The box 70 also includes a mounting beam 20, which is located on the side of the first beam 10 facing the outside of the box 70. The mounting beam 20 is welded to the first part 131.

[0137] The first beam 11 includes a first main body 110 and a first extension wall 111 extending downward from the first main body 110. The second beam 12 includes a second main body 120 and a second extension wall 121 extending upward from the second main body 120. The first extension wall 111 and the second extension wall 121 are at least partially stacked and connected in a first direction. The first extension wall 111 is located on the side of the first main body 110 away from the interior of the box 70 along the first direction, and the second extension wall 121 is located on the side of the second main body 120 away from the interior of the box 70 along the first direction. The first extension wall 111 and the second extension wall 121 together form a first part 131. The first main body 110 and the second main body 120 form a partial enclosure of the slot 13. The first main body 110 and the second main body 120 have the same structure. The first extension wall 111 has the same structure as the second extension wall 121 before it bends in a direction away from the second extension wall 121. The first main body 110 is a hollow rectangular structure, and the second main body 120 is also a hollow rectangular structure. The first extension wall 111 is identical to the second extension wall 121 before bending, making the first beam 11 identical to the second beam 12 before bending. The mounting beam 20 includes a mounting portion 21 and a first flange edge 22 connected to the mounting portion 21. The first flange edge 22 and the mounting portion 21 are arranged along the height direction of the first beam 10. The first flange edge 22 is fitted and welded to the first portion 131. The weld point 14 formed by welding the mounting beam 20 and the first portion 131 is formed by the combined melting and solidification of portions of the first flange edge 22, the first extension wall 111, and the second extension wall 121. The mounting beam 20 also includes a second flange edge 23, which is connected to the mounting portion 21. The second flange edge 23 and the mounting portion 21 are arranged along the height direction of the first beam 10, and the second flange edge 23 is welded to the second body 120.

[0138] The battery device 100 also includes a reinforcing beam 30, which is housed within the slot 13 and forms a third cavity 310. The reinforcing beam 30 includes a body 31 and a support plate 32. The third cavity 310 is formed within the body 31, and the support plate 32 is located within the third cavity 310 and extends along the height direction of the first beam 10. The upper and lower ends of the support plate 32 are fixedly connected to the body 31.

[0139] The difference between the dimension of slot 13 along the height direction and the dimension of reinforcing beam 30 along the height direction is 0.5-1mm.

[0140] The first beam 10 protrudes into the housing 70 relative to the reinforcing beam 30, and the first beam 10 abuts against the battery cell assembly 60.

[0141] At least a portion of the outer surface of the first beam 10 is provided with an anti-corrosion layer.

[0142] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0143] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: The enclosure comprises a housing and a battery cell assembly, wherein the battery cell assembly is disposed within the housing. The housing includes a first beam located on one side of the battery cell assembly along a first direction. The first beam includes a first beam body and a second beam body connected together. Both the first beam body and the second beam body are independently molded parts. The first beam body and the second beam body are arranged along the height direction of the first beam. A portion of the first beam body and a portion of the second beam body are stacked and connected along the first direction, wherein the first direction is perpendicular to the height direction of the first beam.

2. The battery device according to claim 1, characterized in that, The first beam includes a first main body and a first extension wall extending downward from the first main body, and the second beam includes a second main body and a second extension wall extending upward from the second main body. The first extension wall and the second extension wall are at least partially overlapped and connected in the first direction.

3. The battery device according to claim 2, characterized in that, The first extension wall is located on the side of the second extension wall closer to the housing, and a mating groove is formed on the side of the first extension wall facing the second extension wall, with at least a portion of the second extension wall located within the mating groove.

4. The battery device according to claim 3, characterized in that, In the first direction, the surface of the second extension wall facing out of the box body is the first surface, and the surface of the first beam facing out of the box body is the second surface, with the first surface and the second surface being flush.

5. The battery device according to claim 2, characterized in that, At least one of the first body and the second body is a hollow structure.

6. The battery device according to claim 1, characterized in that, Both the first beam and the second beam are formed by bending metal plate structures.

7. The battery device according to claim 1, characterized in that, The first beam and the second beam together form a slot, the opening of the slot facing the interior of the box along the first direction, the enclosure of the slot includes a first part, the first part and the opening are arranged opposite to each other along the first direction; the box also includes a mounting beam, the mounting beam is located on the side of the first beam facing the exterior of the box along the first direction, the mounting beam is welded to the first part.

8. The battery device according to claim 7, characterized in that, The first beam includes a first main body and a first extension wall extending downward from the first main body. The second beam includes a second main body and a second extension wall extending upward from the second main body. The first extension wall and the second extension wall are at least partially stacked and connected in the first direction. The first extension wall is located on the side of the first main body away from the interior of the box along the first direction. The second extension wall is located on the side of the second main body away from the interior of the box along the first direction. The first extension wall and the second extension wall together form the first part. The first main body and the second main body form the partial enclosure of the slot.

9. The battery device according to claim 8, characterized in that, The mounting beam includes a mounting part and a first flange edge connected to the mounting part. The first flange edge and the mounting part are arranged along the height direction of the first beam, and the first flange edge is fitted and welded to the first part.

10. The battery device according to claim 9, characterized in that, The weld point where the mounting beam is welded to the first part is formed by the melting and solidification of the portion of the first flange edge, the portion of the first extension wall, and the portion of the second extension wall.

11. The battery device according to claim 9, characterized in that, The mounting beam also includes a second flange edge, which is connected to the mounting part. The second flange edge and the mounting part are arranged along the height direction of the first beam, and the second flange edge is welded to the second main body.

12. The battery device according to any one of claims 7-11, characterized in that, The battery device also includes a reinforcing beam that is housed in the slot.

13. The battery device according to claim 12, characterized in that, A third cavity is formed inside the reinforcing beam.

14. The battery device according to claim 13, characterized in that, The reinforcing beam includes a body and a support plate. The third cavity is formed within the body. The support plate is located within the third cavity and extends along the height direction of the first beam. The two ends of the support plate along the height direction of the first beam are fixedly connected to the body.

15. The battery device according to claim 12, characterized in that, The difference between the dimension of the slot along the height direction and the dimension of the reinforcing beam along the height direction is in the range of 0.5-1mm; and / or, the first beam protrudes into the housing relative to the reinforcing beam, and the first beam abuts against the battery cell assembly.

16. The battery device according to any one of claims 1-11, characterized in that, At least a portion of the outer surface of the first beam is provided with an anti-corrosion layer.

17. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-16.

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