Battery device and electric equipment

Abstract

The embodiment of the utility model provides a battery device and electric equipment, and relates to the technical field of batteries. The battery device comprises a battery box body and a battery monomer located in the battery box body, a mounting beam is arranged on the outer wall of the battery box body, and the mounting beam comprises a first beam plate and a mounting piece connected to the first beam plate; an energy absorption structure is arranged on the first beam plate and used for absorbing deformation of the first beam plate. The energy absorption structure is arranged on the first beam plate, and when the first beam plate is welded or deforms due to stress, the energy absorption structure can absorb at least part of deformation of the first beam plate, so that the influence of deformation on the mounting piece is reduced, and the possibility that the position and the outline of the mounting piece deform under the condition that the first beam plate deforms is reduced.

Description

Technical Field

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

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] The battery casing has a mounting beam. During welding, the mounting beam is prone to deformation, which can affect the mounting components on the mounting beam. Therefore, how to reduce the impact of welding on the mounting components is a research direction in battery technology. Utility Model Content

[0004] This application provides a battery device and an electrical appliance that can reduce the impact of welding the mounting beam on the mounting components.

[0005] In a first aspect, embodiments of this application provide a battery device, including a battery housing and battery cells located inside the battery housing. The outer wall of the battery housing is provided with a mounting beam, which includes a first beam plate and a mounting member connected to the first beam plate. The first beam plate is provided with an energy-absorbing structure, which is used to absorb the deformation of the first beam plate.

[0006] By adopting the above technical solution, an energy-absorbing structure is provided on the first beam plate. When the first beam plate is welded or deformed by stress, the energy-absorbing structure can absorb at least part of the deformation of the first beam plate, thereby reducing the impact of deformation on the mounting component and reducing the possibility of deformation of the position and outline of the mounting component under the deformation of the first beam plate.

[0007] In some embodiments of this application, the energy-absorbing structure includes at least one first energy-absorbing part, which is configured to absorb the deformation of the first beam along its own length.

[0008] By adopting the above technical solution, the energy-absorbing structure is designed to include at least one first energy-absorbing part, which absorbs the deformation of the first beam plate during welding or under stress, thereby reducing the impact of the deformation of the first beam plate along the length direction on the mounting component.

[0009] In some embodiments of this application, the first beam plate includes opposite first and second surfaces, the first energy-absorbing portion includes a first groove located on the first surface, and / or, the first energy-absorbing portion includes a first through hole penetrating the first surface and the second surface.

[0010] By adopting the above technical solution, the first energy-absorbing part is designed to include a first groove and / or a first through hole. The first groove or the first through hole is more likely to deform and collapse than the plate structure. Therefore, when the first beam plate deforms along the length direction, the first groove or the first through hole can absorb the deformation through its own deformation, thereby reducing the impact of the deformation of the first beam plate along the length direction on the mounting component.

[0011] In some embodiments of this application, a first protrusion is formed on the second surface at the position corresponding to the first groove.

[0012] By adopting the above technical solution, a first protrusion is formed on the second surface at the position corresponding to the first groove. When the first beam plate deforms along the length direction, the recessed structure formed by the first groove and the first protrusion deforms simultaneously, which can improve the deformation absorption capacity of the first energy-absorbing part and better protect the mounting component.

[0013] In some embodiments of this application, at least one end of the first groove along the width direction of the first beam plate is an open structure.

[0014] By adopting the above technical solution, one or both ends of the first groove along the width direction of the first beam plate are designed as open structures. Since there are no side walls in the open structure to affect the deformation of the first groove along the length direction of the first beam plate, the ability of the first groove to absorb deformation can be improved.

[0015] In some embodiments of this application, the first groove includes a first bottom wall and first side walls located on both sides of the first bottom wall. Along the length direction of the first beam plate, the size of the first bottom wall is greater than or equal to 5 mm.

[0016] By adopting the above technical solution, the size of the first bottom wall of the first groove is designed to be greater than or equal to 5mm, so that the first groove has a certain structural size, thereby providing a better energy absorption effect.

[0017] In some embodiments of this application, the dimension of the first bottom wall is greater than or equal to 15 mm along the length direction of the first beam plate.

[0018] By adopting the above technical solution, the size of the first bottom wall of the first groove is designed to be greater than or equal to 15mm, which makes the structural size of the first groove larger and the energy absorption effect better.

[0019] In some embodiments of this application, the number of mounting components is multiple, and the multiple mounting components are arranged at intervals along the length direction of the first beam plate, with at least one first energy-absorbing part provided between two adjacent mounting components.

[0020] By adopting the above technical solution, at least one energy-absorbing part is provided between two adjacent mounting parts. When the first beam plate deforms along its own length direction, the first energy-absorbing part located between the two mounting parts can absorb at least part of the deformation, thereby reducing the impact on the mounting parts on both sides.

[0021] In some embodiments of this application, a plurality of first energy-absorbing parts are provided between two adjacent mounting parts, and the distance between two adjacent first energy-absorbing parts located between two mounting parts is 10mm-100mm along the length direction of the first beam plate.

[0022] By adopting the above technical solution, multiple first energy-absorbing parts are designed between two adjacent mounting parts, and the distance between two first energy-absorbing parts is designed to be 10mm-100mm, which can improve the energy absorption effect to a certain extent and further reduce the impact of the deformation of the first beam plate on the mounting parts.

[0023] In some embodiments of this application, the energy-absorbing structure includes at least one second energy-absorbing part, which is configured to absorb the deformation of the first beam plate along its own width direction.

[0024] By adopting the above technical solution, the energy-absorbing structure is designed to include at least one second energy-absorbing part, which absorbs the deformation of the first beam plate during welding or under stress, thereby reducing the impact of the deformation of the first beam plate along the width direction on the mounting component.

[0025] In some embodiments of this application, the first beam plate includes opposite first and second surfaces, the second energy-absorbing portion includes a second groove recessed on the first surface, and / or the second energy-absorbing portion includes a second through hole penetrating the first surface and the second surface.

[0026] By adopting the above technical solution, the second energy-absorbing part is designed to include a second groove and / or a second through hole. The second groove or the second through hole is more likely to deform and collapse than the plate structure. Therefore, when the first beam plate deforms along the width direction, the second groove or the second through hole can absorb the deformation through its own deformation, thereby reducing the impact of the deformation of the first beam plate along the width direction on the mounting component.

[0027] In some embodiments of this application, the depth of the second groove is greater than or equal to the thickness of the first beam plate.

[0028] By adopting the above technical solution, the depth of the second groove is designed to be greater than or equal to the thickness of the first beam plate. The greater the depth of the second groove, the easier it is to generate deformation, thereby making the ability to absorb deformation stronger.

[0029] In some embodiments of this application, the groove depth of the second groove is greater than or equal to 3 mm.

[0030] By adopting the above technical solution, the depth of the second groove is designed to be greater than or equal to 3mm, which can improve its deformation capacity to a certain extent, thereby improving its ability to absorb the deformation of the first beam plate along the length direction.

[0031] In some embodiments of this application, the second energy-absorbing part and the mounting member are disposed opposite to each other along the width direction of the first beam plate, and are located between the mounting member and the side of the first beam plate connected to the battery box.

[0032] By adopting the above technical solution, the second energy-absorbing part and the mounting part are designed to be arranged opposite to each other along the width direction of the first beam plate. When the first beam plate deforms in the width direction, the deformation is at least partially absorbed by the second energy-absorbing part, thereby reducing the disturbance of the first beam plate's deformation in the width direction to the mounting part.

[0033] In some embodiments of this application, the first beam plate has opposite first and second ends along its length direction, the second energy-absorbing part has a first end facing the first end and a second end away from the first end, and the mounting member has a first side edge facing the first end and a second side edge away from the first end; wherein the distance between the first end and the first end is less than the distance between the first side edge and the first end, and / or, the distance between the second end and the first end is greater than the distance between the second side edge and the first end.

[0034] By adopting the above technical solution, the outer contour dimension of the second energy-absorbing part along the length direction can be designed to be larger than the outer contour dimension of the mounting part. This not only facilitates the deformation of the second energy-absorbing part in the first beam plate, but also absorbs the thermal deformation generated by the mounting part and the first beam plate simultaneously to a certain extent when the mounting part and the first beam plate are connected by welding.

[0035] In some embodiments of this application, along the length direction of the first beam plate, the minimum distance between the first end and the first side edge is greater than or equal to 5 mm, and the minimum distance between the second end and the second side edge is greater than or equal to 5 mm.

[0036] By adopting the above technical solution, the outer contour dimension of the second energy-absorbing part along the length direction is designed to be larger than the outer contour dimension of the mounting part. When the mounting part is welded to the first beam plate, the contour of the second energy-absorbing part can cover the welding heat-affected zone of the first beam plate, thereby directly absorbing the deformation of the first beam plate in the welding heat-affected zone and further reducing the impact of welding thermal stress on the mounting part.

[0037] Secondly, embodiments of this application provide an electrical device including a battery device as described in any of the above technical solutions, the battery device being used to provide electrical energy. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0039] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0040] Figure 2 Schematic diagram of a battery device provided for some embodiments of this application;

[0041] Figure 3 A partial structural schematic diagram of a battery housing provided in some embodiments of this application from a first-view perspective;

[0042] Figure 4 for Figure 3 Enlarged view of part A;

[0043] Figure 5 A partial structural schematic diagram of a battery housing provided in some embodiments of this application from a second perspective;

[0044] Figure 6 for Figure 5 BB cross-section diagram;

[0045] Figure 7 for Figure 5 CC section view;

[0046] Figure 8 for Figure 5 Enlarged view of part D.

[0047] The reference numerals in the accompanying drawings for the specific embodiments are as follows:

[0048] 1000, vehicles;

[0049] 100. Battery device;

[0050] 10. Battery housing;

[0051] 1. First box;

[0052] 2. Second housing;

[0053] 3. Mounting beam; 31. First beam plate; 311. First surface; 312. Second surface; 313. Energy-absorbing structure; 314. First end; 315. Second end; 3131. First energy-absorbing part; 31311. First groove; 313111. First bottom wall; 313112. First side wall; 31312. First protrusion; 3132. Second energy-absorbing part; 31321. Second groove; 313211. Second bottom wall; 313212. Second side wall; 31322. First end; 31323. Second end; 32. Second beam plate; 33. Third beam plate; 34. Mounting component; 341. First side edge; 342. Second side edge;

[0054] 20. Battery cell;

[0055] 200. Controller;

[0056] 300. Motor;

[0057] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0058] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0060] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0062] 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, H and / or B can represent: H existing alone, H and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0063] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0064] In this application, "multiple" means two or more (including two).

[0065] The battery apparatus mentioned in the embodiments of this application 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.

[0066] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0067] In some embodiments, the battery device may be a battery pack, which includes a battery housing and one or more individual battery cells housed within the battery housing.

[0068] As an example, a battery cell assembly can be a battery module, which can be housed in a battery housing by fixing the battery module in the battery housing.

[0069] As an example, battery cell assemblies can also be housed in a battery housing by directly fixing multiple battery cells to the battery housing.

[0070] As an example, the battery enclosure may include a first enclosure and a second enclosure. The first enclosure and the second enclosure are fastened together to form a closed space inside the battery enclosure to house the individual battery cells. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure may be a top cover or a bottom plate.

[0071] As an example, the battery enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are respectively connected to the frame, so that the interior of the battery enclosure forms an enclosed space to house individual battery cells.

[0072] As an example, the battery pack can be part of the vehicle's chassis structure. For instance, the top cover of the battery pack can be at least part of the vehicle's floor, or the frame of the battery pack can be at least part of the vehicle's crossbeams and longitudinal beams.

[0073] In some embodiments, the battery device refers to an energy storage device, which includes a battery housing with a door on at least one side. Energy storage devices include energy storage containers, energy storage cabinets, etc.

[0074] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells and battery devices, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0075] The battery cell mentioned in the embodiments of this application may include an electrode assembly and an electrolyte. The electrode assembly includes a positive electrode, a negative electrode, and a separator. The battery cell mainly relies on the movement of metal ions between the positive and negative electrode plates to operate. The positive electrode includes a positive current collector and a positive active material layer, with the positive active material layer coated on the surface of the positive current collector. The positive current collector includes a positive electrode coating area and a positive electrode tab connected to the positive electrode coating area. The positive electrode coating area is coated with the positive active material layer, while the positive electrode tab is not coated with the positive active material layer. Taking a lithium-ion battery cell as an example, the material of the positive current collector can be aluminum, and the positive active material layer includes positive active material, which can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode current collector. The negative electrode current collector includes a negative electrode coating area and a negative electrode tab connected to the negative electrode coating area. The negative electrode coating area is coated with the negative electrode active material layer, while the negative electrode tab is not coated with the negative electrode active material layer. The material of the negative electrode current collector can be copper, and the negative electrode active material layer includes negative electrode active material, which can be carbon or silicon, etc. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc.

[0076] A battery pack typically consists of a battery housing and individual battery cells located within it. The battery housing withstands external impacts and pressure, protecting the internal components from physical damage and reducing the risk of damage from collisions or drops. The battery housing has a mounting beam on its exterior, which can be machined from sheet metal. Mounting components are installed on the mounting beam to connect to the mounting points of electrical equipment such as those on the vehicle body.

[0077] However, during the processing of the mounting beam and mounting components, such as during welding operations, the mounting beam is prone to deformation due to thermal effects, which directly affects the positional accuracy and contour of the mounting components. This not only affects the structural stability but also negatively impacts the connection between the mounting components and the mounting connection.

[0078] Therefore, how to reduce the stress transmitted to the mounting components when the mounting beam deforms during welding is an important issue in the research and development of battery devices and their related components.

[0079] In view of this, this application provides a technical solution in which an energy-absorbing structure is provided on the mounting beam to absorb the deformation of the mounting beam, thereby reducing the disturbance to the mounting components.

[0080] The battery cells described in the embodiments of this application are applicable to batteries and electrical devices that use batteries.

[0081] Electrical equipment can include 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. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0082] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0083] Combined with appendix Figure 1 As shown, vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, the battery device 100 can serve as the operating power source for vehicle 1000. Vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of vehicle 1000 during starting, navigation, and driving.

[0084] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0085] Combined with appendix Figure 2-4 As shown, this application embodiment provides a battery device 100, including a battery box 10 and a battery cell 20 located inside the battery box 10. The outer wall of the battery box 10 is provided with a mounting beam 3, which includes a first beam plate 31 and a mounting member 34 connected to the first beam plate 31. The first beam plate 31 is provided with an energy-absorbing structure 313, which is used to absorb the deformation of the first beam plate 31.

[0086] The battery device 100 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Both the battery cell 20 and the battery device 100 can be cylindrical, flat, cuboid, or other shapes.

[0087] The battery housing 10 provides a space for housing the battery cells 20, and the battery housing 10 can adopt various structures. In some embodiments, the battery housing 10 may include a first housing 1 and a second housing 2, which are mutually capped, and together define a space for housing the battery cells 20. Both the first housing 1 and the second housing 2 can be hollow structures with one open end, with the second housing 2 capping the open side of the first housing 1 so that the first housing 1 and the second housing 2 together define the space; alternatively, the second housing 2 can be a plate-like structure, and the first housing 1 can be a hollow structure with one open side, with the open side of the second housing 2 capping the open side of the first housing 1. Of course, the battery housing 10 formed by the first housing 1 and the second housing 2 can be of various shapes, such as a cylinder, a cuboid, etc.

[0088] In some embodiments, the outer walls of the first box 1 and / or the second box 2 are provided with mounting beams 3. The number of mounting beams 3 can be two as shown in the figure, with the two mounting beams 3 located on both sides of the first box 1 respectively. Of course, it can also be one or three or more. This embodiment will not list them all.

[0089] The mounting beam 3 can be made of materials such as metal or plastic. For example, in some embodiments, the mounting beam 3 can be a sheet metal part with a cross section approximately shaped like a zigzag formed by processes such as stamping or injection molding. It includes a first beam plate 31, a second beam plate 32, and a third beam plate 33 formed in a first integral.

[0090] The second beam plate 32 is located between the first beam plate 31 and the third beam plate 33, and is angularly connected to the ends of the first beam plate 31 and the third beam plate 33 respectively. For example, the second beam plate 32 is perpendicular / approximately perpendicular to the first beam plate 31 or the third beam plate 33 respectively, and the first beam plate 31 and the third beam plate 33 can be parallel or approximately parallel.

[0091] The energy-absorbing structure 313 described above can be provided on both the first beam plate 31 and the third beam plate 33. Since the third beam plate 33 and the first beam plate 31 have similar structures, this embodiment only describes the first beam plate 31. Of course, it is also possible that the beam plate on which the beam 3 is mounted is only the first beam plate 31 (this embodiment is not shown in the figure).

[0092] The mounting component 34 is connected to the first beam plate 31 and the third beam plate 33. The connection method can be to first install it and then weld it.

[0093] The energy-absorbing structure 313 is a structure formed on the first beam plate 31, and is not independent of the first beam plate 31.

[0094] The energy-absorbing structure 313 is used to absorb the deformation or deformation stress of the first beam plate 31. It can be understood that when the first beam plate 31 deforms due to welding heat effect or external stress, the energy-absorbing structure 313 absorbs at least part of the deformation or deformation stress of the first beam plate 31 through its own deformation, reducing the possibility that the deformation of the remaining part of the first beam plate 31 will affect the mounting component 34, thereby reducing the risk of deformation of the position and outline of the mounting component 34 under the deformation of the first beam plate 31.

[0095] In some examples, the energy-absorbing structure 313 may optionally include at least one first energy-absorbing part 3131, which is configured to absorb the deformation of the first beam plate 31 along its own length direction.

[0096] The length direction of the first beam plate 31 is the first direction X in the figure, and the width direction of the first beam plate 31 is the second direction Y in the figure.

[0097] When the first beam plate 31 is subjected to welding thermal stress or external stress, the first energy-absorbing part 3131 can at least generate deformation along the length direction of the first beam plate 31, thereby absorbing the deformation of the first beam plate 31 along its own length direction.

[0098] The number of first energy-absorbing parts 3131 can be one or more. When there are multiple first energy-absorbing parts 3131, the multiple first energy-absorbing parts 3131 are spaced apart along the length direction of the first beam plate 31.

[0099] The first energy-absorbing part 3131 absorbs the deformation of the first beam plate 31 during welding or under stress, thereby reducing the impact of the deformation of the first beam plate 31 along the length direction on the hanger 34.

[0100] In some examples, the first beam plate 31 may optionally include a first surface 311 and a second surface 312 opposite to each other, the first energy-absorbing part 3131 includes a first groove 31311 located on the first surface 311, and / or the first energy-absorbing part 3131 includes a first through hole (not shown) penetrating the first surface 311 and the second surface 312.

[0101] like Figure 4 As shown in the figure, the first surface 311 in this embodiment can be the surface of the mounting beam 3 facing the mounting connection part of the electrical equipment. For example, when the electrical equipment is a vehicle 1000, the first surface 311 faces the mounting connection part of the vehicle 1000, and the mounting connection part is used to dock with the mounting beam 3. Of course, it can also be the second surface 312, which is the surface of the mounting beam 3 facing the mounting connection part of the electrical equipment (this embodiment is not shown in the figure).

[0102] The first groove 31311 can be formed by stamping, extrusion or other processes from the first beam plate 31, or it can be formed by cutting. In this embodiment, the first groove 31311 is formed directly on the first beam plate 31. The first groove 31311 forms a recessed structure on the first surface 311, and the thickness of the first bottom wall 313111 of the first groove 31311 is the same as or basically the same as the thickness of the beam plate.

[0103] Of course, in addition to the first groove 31311, the first through hole can also achieve the energy absorption effect, but the structural strength of the first beam plate 31 with the first through hole is less than that of the first beam plate 31 with only the first groove 31311.

[0104] The first energy-absorbing part 3131 is designed to include a first groove 31311 and / or a first through hole. The first groove 31311 or the first through hole is more likely to deform and collapse than the plate structure. Therefore, when the first beam plate 31 deforms along the length direction, the first groove 31311 or the first through hole can absorb the deformation through its own deformation, thereby reducing the impact of the deformation of the first beam plate 31 along the length direction on the hanger 34.

[0105] Combined with appendix Figure 5 and 7 As shown, in some examples, optionally, the position corresponding to the first groove 31311 forms a first protrusion 31312 on the second surface 312.

[0106] The first groove 31311 and the first protrusion 31312 in this structure are formed directly during the processing of the first energy-absorbing part 3131. The processing method can be stamping or other methods. The first groove 31311 and the first protrusion 31312 make the thickness of the first energy-absorbing part 3131 the same as or approximately the same as the thickness of the first beam plate 31, thereby improving the structural strength of the first beam plate 31 after the first energy-absorbing part 3131 is set.

[0107] Of course, the arrangement of the first groove 31311 and the first protrusion 31312 can also be the same as... Figure 3 , 4 And there are 7 differences. For example, when the second surface 312 is the mounting connection part facing the electrical equipment, the first energy-absorbing part 3131 is a first protrusion 31312 provided on the second surface 312 (this embodiment is not shown in the figure). That is to say, in this embodiment... Figure 3 , 4 And the first energy-absorbing part 3131 shown in 7, which is concave, can be replaced with the first energy-absorbing part 3131 that is convex.

[0108] The first groove 31311 is positioned to form a first protrusion 31312 on the second surface 312. When the first beam plate 31 deforms along its length, the recessed structure formed by the first groove 31311 and the first protrusion 31312 deforms simultaneously, which can improve the deformation absorption capacity of the first energy-absorbing part 3131 and better protect the mounting part 34.

[0109] In some examples, optionally, at least one end of the first groove 31311 along the width direction of the first beam plate 31 is an open structure.

[0110] The length direction of the first groove 31311 can be set in the width direction of the first beam plate 31, and the first groove 31311 is designed to be open at least one end along the width direction of the first beam plate 31. Compared with the structure of the first groove 31311 with first sidewalls 313112 at both ends along the width direction of the first beam plate 31 (not shown in the figure), the first groove 31311 is designed to have an opening along the width direction of the first beam plate 31. There are no sidewalls at the opening to affect the deformation of the first groove 31311 along the length direction of the first beam plate 31, making the first groove 31311 easier to deform, thereby improving the ability of the first groove 31311 to absorb deformation.

[0111] Combined again with the appendix Figure 7 As shown, in some examples, optionally, the first groove 31311 includes a first bottom wall 313111 and first side walls 313112 located on both sides of the first bottom wall 313111. Along the length direction of the first beam plate 31, the size of the first bottom wall 313111 is greater than or equal to 5 mm.

[0112] The first bottom wall 313111 can be regarded as the bottom wall of the first groove 31311 or the top wall of the first protrusion 31312.

[0113] The first sidewalls 313112 are located on both sides of the first bottom wall 313111 along the length direction (first direction X) of the first beam plate 31. The first sidewalls 313112 can be perpendicular to the first bottom wall 313111 or... Figure 7 The two shown are set at an obtuse angle.

[0114] When the first energy-absorbing part 3131 is subjected to a deformation force along the length of the first beam plate 31, the first groove 31311 on the first surface 311 and the first protrusion 31312 on the second surface 312 deform simultaneously. At this time, the included angle between the first bottom wall 313111 and the first side wall 313112 can gradually decrease to absorb the deformation energy of the first beam plate 31. When the deformation energy is too large, in addition to the change in the included angle between the first bottom wall 313111 and the first side wall 313112, the first bottom wall 313111 can also be bent and deformed.

[0115] The reason for designing the size a of the first bottom wall 313111 of the first groove 31311 to be greater than or equal to 5mm is that the larger the size of the first bottom wall 313111, the easier it is to bend and deform in different areas, thereby providing a better energy absorption effect.

[0116] In some examples, optionally, the dimension of the first bottom wall 313111 along the length direction of the first beam plate 31 is greater than or equal to 15 mm.

[0117] The first bottom wall 313111 has a larger size and better energy absorption effect. Along the length of the first beam 31, the size a of the first bottom wall 313111 is greater than or equal to 15mm, for example, it can be 15mm, 20mm, 25mm, 30mm, etc. The specific size depends on the length of the hanging beam 3, which will not be listed one by one in this embodiment.

[0118] Similarly, along the length direction of the first beam plate 31 or the first direction X, the dimensions of the second bottom wall 313211 of the second groove 31321 described below can also be designed according to the dimensions of the first bottom wall 313111. This embodiment will not elaborate on this.

[0119] Combined again with the appendix Figure 3-5 As shown, in some examples, optionally, there are multiple mounting members 34, which are arranged at intervals along the length direction of the first beam plate 31, and at least one first energy-absorbing part 3131 is provided between two adjacent mounting members 34.

[0120] The mounting component 34 can be installed on the first beam plate 31 and the third beam plate 33 by means of welding, riveting, bolting, etc. Correspondingly, connection holes can be opened on the first beam plate 31 and the third beam plate 33 for the mounting component 34 to be inserted.

[0121] Multiple mounting components 34 can improve the connection stability between the mounting beam 3 and the mounting connection of the electrical equipment. The mounting component 34 can be approximately cylindrical as shown in the figure, or it can be other shapes, such as rod-shaped or plate-shaped, etc., which will not be listed one by one in this embodiment.

[0122] When there are multiple mounting members 34, the deformation of the first beam plate 31 will affect each mounting member 34. Therefore, in this embodiment, at least one energy-absorbing part is provided between two adjacent mounting members 34. When the first beam plate 31 deforms along its own length direction, the first energy-absorbing part 3131 located between the two mounting members 34 can absorb at least part of the deformation, thereby reducing the impact on the mounting members 34 on both sides.

[0123] In some examples, optionally, a plurality of first energy-absorbing parts 3131 are provided between two adjacent mounting parts 34, and the distance between two adjacent first energy-absorbing parts 3131 located between two mounting parts 34 is 10mm-100mm along the length direction of the first beam plate 31.

[0124] The design of multiple first energy-absorbing parts 3131 between two adjacent mounting parts 34, and the design of the spacing between two first energy-absorbing parts 3131 being 10mm-100mm, can improve the energy absorption effect to a certain extent and further reduce the impact of the deformation of the first beam plate 31 on the mounting parts 34.

[0125] The number of first energy-absorbing parts 3131 between two adjacent mounting parts 34 can be two or more. Multiple first energy-absorbing parts 3131 can provide better energy absorption effect and further reduce the interference of the first beam plate 31 on the position and contour of the mounting part 34 when it deforms along the length direction.

[0126] The distance between two adjacent first energy-absorbing parts 3131 located between two mounting parts 34 is 10mm-100mm, such as 10mm, 30mm, 50mm, 70mm and 100mm.

[0127] Taking the distance between two adjacent first energy-absorbing parts 3131 located between two mounting parts 34 as 50mm, and the first energy-absorbing part 3131 including the first groove 31311 and the first protrusion 31312 mentioned above, the first energy-absorbing part 3131 with this distance can not only meet the energy absorption requirements, but also the distance between the first energy-absorbing parts 3131 is not too dense, which is convenient for processing.

[0128] Combined with appendix Figure 3-6 and appendix Figure 8 As shown, in some examples, the energy-absorbing structure 313 optionally includes at least one second energy-absorbing part 3132, which is configured to absorb the deformation of the first beam plate 31 along its own width direction.

[0129] When the first beam plate 31 is subjected to welding thermal stress or external stress, the second energy-absorbing part 3132 can at least generate deformation along the width direction of the first beam plate 31, thereby absorbing the deformation of the first beam plate 31 along its own width direction.

[0130] The number of second energy-absorbing parts 3132 can be one or more. When there are multiple second energy-absorbing parts 3132, the multiple second energy-absorbing parts 3132 can also be arranged at intervals along the length direction of the first beam plate 31.

[0131] The second energy-absorbing part 3132 absorbs the deformation of the first beam plate 31 during welding or under stress, thereby reducing the impact of the deformation of the first beam plate 31 along the width direction on the hanger 34.

[0132] In some examples, the first beam plate 31 may optionally include opposite first surfaces 311 and second surfaces 312, the second energy-absorbing portion 3132 may include a second groove 31321 recessed on the first surface 311, and / or the second energy-absorbing portion 3132 may include a second through hole (not shown) penetrating the first surface 311 and the second surface 312.

[0133] The second groove 31321 can be formed by stamping, extrusion or other processes from the first beam plate 31, or it can be formed by cutting. In this embodiment, the second groove 31321 is formed directly on the first beam plate 31. The second groove 31321 forms a recessed structure on the first surface 311, and the thickness of the second bottom wall 313211 of the second groove 31321 is the same as or basically the same as the thickness of the beam plate.

[0134] In some embodiments, the second groove 31321 includes a second bottom wall 313211 and a second side wall 313212. The length direction of the second groove 31321 is set in the length direction of the first beam plate 31, and the second groove 31321 can be designed to have an open structure at least one end along the length direction of the first beam plate 31.

[0135] Of course, in addition to the second groove 31321, the second through hole can also achieve the energy absorption effect, but the structural strength of the first beam plate 31 with the second through hole is less than that of the first beam plate 31 with only the second groove 31321.

[0136] The second energy-absorbing part 3132 is designed to include a second groove 31321 and / or a second through hole. The second groove 31321 or the second through hole is more likely to deform and collapse than the plate structure. Therefore, when the first beam plate 31 deforms along the width direction, the second groove 31321 or the second through hole can absorb the deformation through its own deformation, thereby reducing the impact of the deformation of the first beam plate 31 along the width direction on the hanger 34.

[0137] Combined with appendix Figure 6 As shown, in some examples, optionally, the groove depth of the second groove 31321 is greater than or equal to the thickness of the first beam plate 31.

[0138] The second groove 31321 includes a second bottom wall 313211 and a second side wall 313212, along a third direction Z perpendicular to the first direction X and the second direction Y. The second groove 31321 has a groove depth b, which can be understood as the distance from the top of the second side wall 313212 to the second bottom wall 313211 along the third direction Z.

[0139] b is greater than or equal to the thickness of the first beam plate 31, and the greater the depth of the second groove 31321, the easier it is to generate deformation, thus making the ability to absorb deformation stronger.

[0140] In some examples, optionally, the groove depth of the second groove 31321 is greater than or equal to 3 mm.

[0141] For example, the groove depth b of the second groove 31321 can be 3mm, 5mm, 7mm and 10mm, etc., and in some embodiments, the groove depth of the second groove 31321 is less than or equal to 20mm to reduce the processing difficulty.

[0142] Designing the depth of the second groove 31321 to be greater than or equal to 3mm can improve its deformation capacity to a certain extent, thereby improving its ability to absorb the deformation of the first beam plate 31 along the length direction.

[0143] Similarly, the groove depth of the first groove 31311 can also adopt this design, or the groove depth of the first groove 31311 can be designed to be smaller, such as 1-5mm, specifically 1mm, 2mm, 3mm, 4mm and 5mm, which will not be elaborated in this embodiment.

[0144] Combined again with the appendix Figure 3 Appendix Figure 5 and appendix Figure 8 As shown, in some examples, optionally, the second energy-absorbing part 3132 and the mounting member 34 are arranged opposite each other along the width direction of the first beam plate 31 and are located between the side of the first beam plate 31 connected to the battery box 10 and the mounting member 34.

[0145] The second energy-absorbing part 3132 and the mounting member 34 are arranged opposite to each other along the width direction of the first beam plate 31, and the second energy-absorbing part 3132 can be arranged adjacent to the opposite mounting member 34, for example, the distance between the two is not greater than 20mm, so as to better absorb the deformation transmitted to the mounting member 34.

[0146] The second energy-absorbing part 3132 is located between the side of the first beam plate 31 near the battery box 10 and the mounting member 34. This design takes into account that the side of the first beam plate 31 near the battery box 10 is connected to the battery box 10 along its length by welding, and the welding thermal stress is large. When the second energy-absorbing part 3132 is located between the weld and the mounting member 34, it can better absorb the thermal stress transmitted to the mounting member 34 during the welding of the beam plate.

[0147] In some examples, optionally, the first beam plate 31 has opposite first ends 314 and second ends 315 along its length direction, the second energy-absorbing part 3132 has a first end 31322 facing the first end 314 and a second end 31323 facing away from the first end 314, and the mounting member 34 has a first side edge 341 facing the first end 314 and a second side edge 342 facing away from the first end 314; wherein the distance between the first end 31322 and the first end 314 is less than the distance between the first side edge 341 and the first end 314, and / or, the distance between the second end 31323 and the first end 314 is greater than the distance between the second side edge 342 and the first end 314.

[0148] The distance between the first end 31322 and the first end 314 of the first beam plate 31 is less than the distance between the first side edge 341 and the first end 314, so that the first end 31322 protrudes from one side of the hanger 34 along the length direction of the first beam plate 31.

[0149] Similarly, the distance between the second end 31323 and the first end 314 is greater than the distance between the second side edge 342 and the first end 314, so that the second end 31323 protrudes from the second side edge 342 along the length direction of the first beam plate 31.

[0150] This structure allows the outer contour dimension of the second energy-absorbing part 3132 along the length direction to be larger than the outer contour dimension of the mounting part 34. This not only facilitates the deformation of the second energy-absorbing part 3132 in the first beam plate 31, but also absorbs the thermal deformation generated by the mounting part 34 and the first beam plate 31 simultaneously to a certain extent when the mounting part 34 and the first beam plate 31 are connected by welding.

[0151] In some examples, optionally, along the length direction of the first beam plate 31, the minimum distance between the first end 31322 and the first side edge 341 is greater than or equal to 5 mm, and the minimum distance between the second end 31323 and the second side edge 342 is greater than or equal to 5 mm.

[0152] Along the length direction of the first beam plate 31, the minimum distance between the first end 31322 and the first side edge 341 is c, where c is greater than or equal to 5mm. In some embodiments, c can be 5mm-30mm, such as 5mm, 10mm, 15mm, 20mm, 25mm and 30mm. The minimum distance between the second end 31323 and the second side edge 342 is d, where d is greater than or equal to 5mm, such as 5mm, 10mm, 15mm, 20mm, 25mm and 30mm.

[0153] Accordingly, the dimension of the second energy-absorbing part 3132 along the length of the first beam plate 31 can be greater than or equal to the dimension (diameter) of the mounting part 34 by at least 10 mm.

[0154] This design takes into account that when the mounting component 34 is welded to the first beam plate 31, there is a welding heat-affected zone of about 5mm at the welding position between the first beam plate 31 and the mounting component 34. When the structure of the second energy-absorbing part 3132 adopts the above design, the outline of the second energy-absorbing part 3132 can cover the welding heat-affected zone of the first beam plate 31, thereby directly absorbing the deformation of the first beam plate 31 at the welding heat-affected zone, and further reducing the impact of welding thermal stress on the mounting component 34.

[0155] Finally, please see the appendix. Figure 2-8As shown, this application embodiment provides a battery device 100, including a battery housing 10 and battery cells 20 located within the battery housing 10. The outer wall of the battery housing 10 is provided with a mounting beam 3, which includes a first beam plate 31 and a mounting member 34 connected to the first beam plate 31. The first beam plate 31 is provided with an energy-absorbing structure 313, which absorbs deformation of the first beam plate 31. The energy-absorbing structure 313 includes at least one first energy-absorbing portion 3131, configured to absorb deformation of the first beam plate 31 along its length. The first beam plate 31 includes opposite first surfaces 311 and second surfaces 312. The first energy-absorbing portion 3131 includes a first groove 31311 located on the first surface 311, and / or, the first energy-absorbing portion 3131 includes a first through hole penetrating the first surface 311 and the second surface 312. A first protrusion 31312 is formed on the second surface 312 at a position corresponding to the first groove 31311. The first groove 31311 has an open structure at least one end along the width direction of the first beam plate 31. The first groove 31311 includes a first bottom wall 313111 and first side walls 313112 located on both sides of the first bottom wall 313111. Along the length direction of the first beam plate 31, the dimension of the first bottom wall 313111 is greater than or equal to 5 mm. Along the length direction of the first beam plate 31, the dimension of the first bottom wall 313111 is greater than or equal to 15 mm. There are multiple mounting members 34, which are arranged at intervals along the length direction of the first beam plate 31. At least one first energy-absorbing part 3131 is provided between two adjacent mounting members 34. Multiple first energy-absorbing parts 3131 are provided between two adjacent mounting members 34. Along the length direction of the first beam plate 31, the distance between two adjacent first energy-absorbing parts 3131 located between two mounting members 34 is 10 mm-100 mm. The energy-absorbing structure 313 includes at least one second energy-absorbing portion 3132, which is configured to absorb deformation of the first beam plate 31 along its width direction. The first beam plate 31 includes a first surface 311 and a second surface 312 opposite to each other. The second energy-absorbing portion 3132 includes a second groove 31321 recessed in the first surface 311, and / or, the second energy-absorbing portion 3132 includes a second through hole penetrating the first surface 311 and the second surface 312. The groove depth of the second groove 31321 is greater than or equal to the thickness of the first beam plate 31. The groove depth of the second groove 31321 is greater than or equal to 3 mm. The second energy-absorbing portion 3132 is disposed opposite to the mounting member 34 along the width direction of the first beam plate 31 and is located between the side of the first beam plate 31 connected to the battery box 10 and the mounting member 34.The first beam plate 31 has a first end 314 and a second end 315 opposite to each other along its length direction. The second energy-absorbing part 3132 has a first end 31322 facing the first end 314 and a second end 31323 facing away from the first end 314. The mounting member 34 has a first side edge 341 facing the first end 314 and a second side edge 342 facing away from the first end 314. The distance between the first end 31322 and the first end 314 is less than the distance between the first side edge 341 and the first end 314, and / or the distance between the second end 31323 and the first end 314 is greater than the distance between the second side edge 342 and the first end 314. Along the length direction of the first beam plate 31, the minimum distance between the first end 31322 and the first side edge 341 is greater than or equal to 5 mm, and the minimum distance between the second end 31323 and the second side edge 342 is greater than or equal to 5 mm.

[0156] Combined again with the appendix Figure 1 As shown, based on the battery device 100 described above, this application embodiment also provides an electrical device, including the battery device 100 described above. The battery device 100 is used to provide electrical energy to the electrical device, which may be a vehicle 1000.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for the intermediate technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A battery device, comprising a battery housing and battery cells located within the battery housing, wherein the outer wall of the battery housing is provided with a mounting beam, the mounting beam comprising a first beam plate and a mounting member connected to the first beam plate; characterized in that, The first beam plate is provided with an energy-absorbing structure, which is used to absorb the deformation of the first beam plate.

2. The battery device according to claim 1, characterized in that, The energy-absorbing structure includes at least one first energy-absorbing part, which is configured to absorb the deformation of the first beam along its own length.

3. The battery device according to claim 2, characterized in that, The first beam plate includes opposite first and second surfaces, the first energy-absorbing portion includes a first groove located on the first surface, and / or the first energy-absorbing portion includes a first through hole penetrating the first surface and the second surface.

4. The battery device according to claim 3, characterized in that, A first protrusion is formed on the second surface at the position corresponding to the first groove.

5. The battery device according to claim 3, characterized in that, At least one end of the first groove along the width direction of the first beam plate is an open structure.

6. The battery device according to claim 3, characterized in that, The first groove includes a first bottom wall and first side walls located on both sides of the first bottom wall. Along the length direction of the first beam plate, the size of the first bottom wall is greater than or equal to 5 mm.

7. The battery device according to claim 6, characterized in that, Along the length of the first beam plate, the dimension of the first bottom wall is greater than or equal to 15mm.

8. The battery device according to claim 2, characterized in that, The number of mounting components is multiple, and the multiple mounting components are arranged at intervals along the length direction of the first beam plate, with at least one first energy-absorbing part provided between two adjacent mounting components.

9. The battery device according to claim 8, characterized in that, Multiple first energy-absorbing parts are provided between two adjacent mounting components. Along the length direction of the first beam plate, the distance between two adjacent first energy-absorbing parts between two mounting components is 10mm-100mm.

10. The battery device according to any one of claims 1-9, characterized in that, The energy-absorbing structure includes at least one second energy-absorbing part, which is configured to absorb the deformation of the first beam plate along its own width direction.

11. The battery device according to claim 10, characterized in that, The first beam plate includes a first surface and a second surface opposite to each other, the second energy-absorbing portion includes a second groove recessed on the first surface, and / or the second energy-absorbing portion includes a second through hole penetrating the first surface and the second surface.

12. The battery device according to claim 11, characterized in that, The depth of the second groove is greater than or equal to the thickness of the first beam plate.

13. The battery device according to claim 12, characterized in that, The depth of the second groove is greater than or equal to 3 mm.

14. The battery device according to claim 10, characterized in that, The second energy-absorbing part and the mounting member are arranged opposite each other along the width direction of the first beam plate, and are located between the mounting member and the side of the first beam plate connected to the battery box.

15. The battery device according to claim 14, characterized in that, The first beam plate has opposite first and second ends along its length direction, the second energy-absorbing part has a first end facing the first end and a second end away from the first end, and the mounting member has a first side edge facing the first end and a second side edge away from the first end; Wherein, the distance between the first end and the first end is less than the distance between the first side edge and the first end, and / or, the distance between the second end and the first end is greater than the distance between the second side edge and the first end.

16. The battery device according to claim 15, characterized in that, Along the length of the first beam, the minimum distance between the first end and the first side edge is greater than or equal to 5mm, and the minimum distance between the second end and the second side edge is greater than or equal to 5mm.

17. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-16, the battery device being used to provide electrical energy.

Images