Battery and vehicle

Abstract

The invention provides a battery and a vehicle. A battery for a vehicle includes: a battery cell; the box body comprises a containing cavity and a cover plate, the battery monomers are contained in the box body, the cover plate seals the containing cavity, the cover plate comprises a first aluminum layer, the first aluminum layer is arranged on the side, away from the containing cavity, of the cover plate, and the first aluminum layer is provided with a welding face; the cross beam is arranged on the side, away from the containing cavity, of the cover plate, is used for being connected with a seat of the vehicle and comprises a second aluminum layer, and the second aluminum layer is provided with a contact surface; and the contact surface is welded with the welding surface. The cover plate is provided with the first aluminum layer, the welding surface is arranged on the first aluminum layer, the second aluminum layer is arranged on the cross beam, the contact surface is arranged on the second aluminum layer, and the welding surface and the contact surface are welded and connected, so that the cross beam is fixed on the cover plate, the welding effect is better, the connection strength is higher, and the cross beam is more reliably integrated on the box body of the battery.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and more specifically, relates to a battery and a vehicle. Background Art

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] For vehicles using batteries, in order to improve integration, seat crossbeams are often integrated into the battery box. However, how to achieve the integration of the battery box and the seat crossbeam and ensure the reliability of the integration is a problem that needs to be solved. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide a battery and a vehicle to improve the reliability of the integration of the seat crossbeam and the battery box.

[0005] In a first aspect, an embodiment of the present application provides a battery for a vehicle, comprising:

[0006] Battery cells;

[0007] The box body includes a receiving cavity and a cover plate. The battery cells are received in the box body. The cover plate seals the receiving cavity. The cover plate includes a first aluminum layer. The first aluminum layer is disposed on a side of the cover plate away from the receiving cavity. The first aluminum layer has a welding surface.

[0008] A crossbeam is disposed on a side of the cover plate facing away from the accommodating cavity, the crossbeam is used to connect the vehicle seat, and the crossbeam includes a second aluminum layer having a contact surface;

[0009] The contact surface is connected to the welding surface by welding.

[0010] In the technical solution of the embodiment of the present application, a first aluminum layer is provided on the cover plate, and a welding surface is provided on the first aluminum layer; a second aluminum layer is provided on the beam, and a contact surface is provided on the second aluminum layer; the welding surface and the contact surface are welded together to fix the beam on the cover plate, so that the welding effect is better and the connection strength is higher, thereby more reliably integrating the beam into the battery box.

[0011] In some embodiments, the crossbeam includes a first structural layer, and a second aluminum layer is provided on a side of the first structural layer close to the cover plate.

[0012] The crossbeam is provided with a first structural layer so as to provide the crossbeam with good structural strength and support the second aluminum layer.

[0013] In some embodiments, the first structural layer is a steel layer.

[0014] The first structural layer uses a steel layer, which can make the structural strength of the beam higher.

[0015] In some embodiments, the contact surface and the welding surface are continuously welded together along at least a portion of the length direction of the beam.

[0016] Connecting the contact surface and the welding surface by continuous welding in at least a portion of the area can improve the strength of the connection between the contact surface and the welding surface, thereby improving the connection strength between the cover plate and the crossbeam.

[0017] In some embodiments, the contact surface and the welding surface are connected by brazing or laser welding.

[0018] Using brazing or laser welding the contact surface and the welding surface is not only convenient for welding, but also has high connection strength and more stable connection.

[0019] In some embodiments, the beam is provided with a second aluminum layer at least in a region corresponding to the contact surface.

[0020] Providing a second aluminum layer in a partial area of ​​the crossbeam can facilitate the production of the crossbeam while facilitating the setting of the contact surface.

[0021] In some embodiments, the cover plate is provided with a first aluminum layer at least in a region corresponding to the welding surface.

[0022] The first aluminum layer is provided in a part of the cover plate, which can facilitate the production of the cover plate while facilitating the setting of the welding surface.

[0023] In some embodiments, the cover plate includes a second structural layer, and the first aluminum layer is disposed on the second structural layer.

[0024] The cover plate is provided with a second structural layer to ensure that the cover plate has good structural strength and supports the first aluminum layer.

[0025] In some embodiments, the first aluminum layer is located on a side of the second structural layer close to the crossbeam;

[0026] Alternatively, the first aluminum layer is located on a side of the second structural layer facing away from the beam, and an opening is provided on the second structural layer in a region corresponding to the welding surface to expose the first aluminum layer.

[0027] A first aluminum layer is arranged on a side of the second structural layer close to the crossbeam, so that a welding surface of the first aluminum layer is connected to the second aluminum layer of the crossbeam by welding.

[0028] A first aluminum layer is provided on the side of the second structural layer facing away from the beam, and the first aluminum layer can be protected by the second structural layer; and an opening is provided on the second structural layer to expose the welding surface of the first aluminum layer so as to be welded to the second aluminum layer of the beam.

[0029] In some embodiments, the second structural layer is a steel layer.

[0030] The second structural layer uses a steel layer, which can make the structural strength of the cover plate higher and also facilitate the processing, forming and manufacturing of the cover plate.

[0031] In some embodiments, the box body further includes a heat conducting plate, which is stacked with the cover plate. The heat conducting plate is located on a side of the cover plate close to the accommodating cavity, and a flow channel is formed between the heat conducting plate and the cover plate.

[0032] A heat conducting plate is stacked on the side of the cover plate close to the accommodating cavity, and a flow channel is formed between the cover plate and the heat conducting plate. The coolant supply system can be connected to allow the coolant to flow through the flow channel, thereby controlling the temperature of the heat conducting plate and further controlling the temperature of the battery.

[0033] In some embodiments, the heat conducting plate is an aluminum plate or a steel-aluminum composite plate, and the heat conducting plate is welded to the first aluminum layer.

[0034] The heat conducting plate is made of aluminum plate or steel-aluminum composite plate, and the heat conducting plate is welded to the first aluminum layer, so that the inner wall of the formed flow channel is all aluminum layer, which not only has good heat conduction effect, but also makes the inner wall of the formed flow channel have good corrosion resistance.

[0035] In some embodiments, a cavity is provided along the longitudinal direction of the beam, and a blocking portion is provided at at least one end of the cavity along the longitudinal direction.

[0036] A cavity is provided in the beam to reduce the weight of the beam; and a sealing portion is provided at the end of the cavity to increase the structural strength of the beam, thereby improving the structural strength of the battery, and reducing the risk of foreign matter entering the beam.

[0037] In some embodiments, the cross beam and the blocking portion are an integrally formed structure.

[0038] The crossbeam and the blocking portion are integrally formed, which can be easily processed and manufactured.

[0039] In some embodiments, a reinforcement is provided at least at one end of the beam in the length direction, and the reinforcement is fixedly connected to the cover plate.

[0040] Reinforcements are provided at the ends of the crossbeams to increase the structural strength of the crossbeams and thereby enhance the structural strength of the battery.

[0041] In a second aspect, an embodiment of the present application provides a vehicle, comprising a battery as described in the above embodiment, and a crossbeam connecting the vehicle's seats.

[0042] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or exemplary technical descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0045] Figure 2 Schematic diagram of the exploded structure of batteries according to some embodiments of the present application;

[0046] Figure 3 This is a schematic diagram of the structure in which the crossbeam and the cover plate are connected in some embodiments of the present application;

[0047] Figure 4 for Figure 3 Schematic diagram of the top view of the structure where the middle cross beam is connected to the cover plate;

[0048] Figure 5 For the Figure 4 Schematic diagram of the cross-sectional structure along the AA line;

[0049] Figure 6 Schematic diagram of the cross-sectional structure of the connection between the beam and the cover plate in some embodiments of the present application Figure 1 ;

[0050] Figure 7 Schematic diagram of the cross-sectional structure of the connection between the beam and the cover plate in some embodiments of the present application Figure 2 ;

[0051] Figure 8 Schematic diagram of the cross-sectional structure of the connection between the beam and the cover plate in some embodiments of the present application Figure 3 ;

[0052] Figure 9 Schematic diagram of the cross-sectional structure of the connection between the beam and the cover plate in some embodiments of the present application Figure 4 ;

[0053] Figure 10 Schematic diagram of the cross-sectional structure of the connection between the beam and the cover plate in some embodiments of the present application Figure 5 ;

[0054] Figure 11 Schematic diagram of the cross-sectional structure of the connection between the beam and the cover plate in some embodiments of the present application Figure 6 ;

[0055] Figure 12 Schematic diagram of the cross-sectional structure of the connection between the beam and the cover plate in some embodiments of the present application Figure 7 ;

[0056] Figure 13 Schematic diagram of the cross-sectional structure of the connection between the beam and the cover plate in some embodiments of the present application Figure 8 ;

[0057] Figure 14 Schematic diagram of the cross-sectional structure of the cover plate of some embodiments of the present application;

[0058] Figure 15 Schematic diagram of the structure of the connection between the crossbeam and the cover plate in other embodiments of the present application;

[0059] Figure 16 Schematic diagram of the structure in which the crossbeam and the cover plate are connected in some other embodiments of the present application.

[0060] Among them, the main marks of the drawings in the figure are:

[0061] 1000-Vehicle; 1001-Battery; 1002-Controller; 1003-Motor;

[0062] 100 - box body; 10 - receiving chamber; 101 - first part; 102 - second part; 200 - battery cell;

[0063] 11-cover plate; 110-flow channel; 111-first aluminum layer; 1111-welding surface; 112-second structural layer; 1121-opening; 113-third structural layer; 12-crossbeam; 120-cavity; 121-second aluminum layer; 1211-contact surface; 122-first structural layer; 123-fourth structural layer; 124-sealing part; 125-reinforcement member; 13-heat conducting plate. DETAILED DESCRIPTION

[0064] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0065] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0066] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly specify the quantity, specific order, or primary-secondary relationship of the technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0067] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0068] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0069] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple sheets" refers to two or more (including two sheets). "Several" means one or more, unless otherwise specifically defined.

[0070] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0071] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0072] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0073] In the description of the embodiments of this application, unless otherwise specified or limited, the technical term "adjacent" refers to proximity in position. For example, if there are three components A1, A2, and B, and the distance between A1 and B is greater than the distance between A2 and B, then A2 is closer to B than A1, that is, A2 is adjacent to B, or B is adjacent to A2. For another example, when there are multiple components C, the multiple components C are C1, C2, ..., C N , when one of the C components, such as C2, is closer to the B component than other C components, then B is adjacent to C2, or it can be said that C2 is adjacent to B.

[0074] In the embodiments of the present application, battery cells include, but are not limited to, lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells. The shapes of battery cells include, but are not limited to, cylindrical, flat, rectangular, or other shapes. Battery cells are generally categorized by packaging method, including, but not limited to, cylindrical, prismatic, and soft-pack battery cells.

[0075] The battery mentioned in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack. The battery generally includes a casing for encapsulating one or more battery cells. The casing can, to a certain extent, prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. In some cases, the battery cells can also be used directly, that is, the battery may not include a casing, which is not limited here.

[0076] In a battery, when there are multiple battery cells, they can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections. Multiple battery cells can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell structure is housed within a housing. Alternatively, a battery can be constructed by first connecting multiple battery cells in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a single unit, which is then housed within a housing. The battery may also include other structures, such as a busbar assembly for electrically connecting multiple battery cells.

[0077] For electrical devices such as electric vehicles, larger batteries are often installed. To improve the integration of the vehicle, the seat beam is often integrated directly into the battery cover. Currently, the seat beam is generally made of steel. To achieve the connection between the two, the battery cover is also made of steel and spot-welded to the seat beam. However, this connection method makes the welding effect between the seat beam and the battery cover poor, the strength is weak, and the weld between the seat beam and the cover is prone to cracking, poor stability, and poor connection reliability. In addition, the use of steel for the battery cover increases the weight of the battery pack, which is not conducive to lightweighting the entire vehicle. If the battery cover is made of aluminum, the battery cover and the seat beam are connected by bolts. The connection structure between the two is complex, the number of bolts is large, the assembly operation is complicated, there are many sealing failure points, and the connection reliability is poor.

[0078] Based on the above considerations, in order to solve the above problems, an embodiment of the present application provides a battery, in which a first aluminum layer is arranged through a cover plate, and a welding surface is arranged on the first aluminum layer, a second aluminum layer is arranged on the beam, and a contact surface is arranged on the second aluminum layer, so that the welding surface and the contact surface are welded together, the welding effect is better, the connection strength is higher, and it is more stable and not easy to crack, so as to achieve the goal of stably fixing the beam on the cover plate.

[0079] The battery disclosed in the embodiments of the present application can be used as an electrical device or various energy storage systems using the battery as an energy storage element, such as energy storage power supply systems such as hydropower, thermal power, wind power, and solar power stations. The electrical device can be, but is not limited to, an electric toy, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0080] For the convenience of description, an electric device is provided in accordance with an embodiment of the present application, and the electric device is described by taking a vehicle as an example.

[0081] Please refer to Figure 1 , Figure 1A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1001 is provided inside the vehicle 1000, and the battery 1001 may be provided at the bottom of the vehicle 1000. The battery 1001 may be used to power the vehicle 1000, for example, the battery 1001 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 1002 and a motor 1003, and the controller 1002 is used to control the battery 1001 to power the motor 1003, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0082] In some embodiments of the present application, the battery 1001 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0083] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of the battery 1001 provided in some embodiments of the present application. The battery 1001 includes a housing 100 and a battery cell 200, and the battery cell 200 is accommodated in the housing 100. The housing 100 is used to provide a storage space for the battery cell 200, and the housing 100 can adopt a variety of structures. In some embodiments, the housing 100 may include a first part 101 and a second part 102, and the first part 101 and the second part 102 cover each other, and the first part 101 and the second part 102 jointly define a storage space for accommodating the battery cell 200. The second part 102 can be a hollow structure with one end open, and the first part 101 can be a plate-like structure, and the first part 101 covers the open side of the second part 102, so that the first part 101 and the second part 102 jointly define a storage space; the first part 101 and the second part 102 can also be hollow structures with one side open, and the open side of the first part 101 covers the open side of the second part 102. Of course, the box 100 formed by the first part 101 and the second part 102 can be of various shapes, such as a cylinder, a cuboid, etc. After the multiple battery cells 200 are connected in parallel, in series, or in a mixed combination, they are placed in the box 100 formed by the first part 101 and the second part 102 being fastened together.

[0084] See also Figures 2 to 6According to some embodiments of the present application, the present application provides a battery 1001, including: a battery cell 200, a box body 100 and a crossbeam 12, the box body 100 includes a accommodating cavity and a cover plate 11, the battery cell 200 is accommodated in the box body 100, the cover plate 11 closes the accommodating cavity 10, the cover plate 11 includes a first aluminum layer 111, the first aluminum layer 111 is placed on the side of the cover plate 11 away from the accommodating cavity 10, and the first aluminum layer 111 has a welding surface 1111; the crossbeam 12 is placed on the side of the cover plate 11 away from the accommodating cavity 10, the crossbeam 12 is used to connect the seat of the vehicle, the crossbeam 12 includes a second aluminum layer 121, the second aluminum layer 121 has a contact surface 1211; the contact surface 1211 is welded to the welding surface 1111.

[0085] The box body 100 refers to a cabinet structure for providing a storage space for the battery 1001 to support and protect the battery 1001 .

[0086] The accommodating cavity 10 refers to the space in the box body 100 for accommodating the battery cell 200. If the box body 100 includes a first portion 101 and a second portion 102, and the second portion 102 is a hollow structure with one side open, the accommodating cavity 10 may be the interior space of the second portion 102.

[0087] The cover plate 11 refers to a plate-like structural member, which is used to cover an opening or window or other mouth structure. If the box body 100 includes a first part 101 and a second part 102, the cover plate 11 can serve as the first part of the box body 100, or the cover plate 11 is a partial structure of the first part 101 of the box body 100, and is arranged on the opening side of the second part 102. For example, when the first part 101 is a plate-like structure, the cover plate 11 can serve as the first part 101. When the first part 101 is a hollow structure with an opening on one side, the cover plate 11 can be the top of the first part 101. In other words, the cover plate 11 is the top of the storage space of the box body 100. The cover plate 11 can be connected to the side wall of the storage space of the box body 100 by means of bolts, rivets, welding, etc. Of course, the cover plate 11 can also be integrally formed with the side wall of the storage space of the box body 100, such as by forging or stamping a hollow structure with an open side, with the bottom of the hollow structure serving as the cover plate 11, and the side of the hollow structure serving as the side wall of the box body 100. The storage space of the box body 100 is the storage cavity 10 of the box body 100. The crossbeam 12 refers to a beam-column structure provided on the cover plate 11. Providing the crossbeam 12 on the cover plate 11 can not only increase the overall structural strength of the battery 1001, but also connect and support structural parts such as seats and controllers through the crossbeam 12. When the electrical device using the battery 1001 is a vehicle, the crossbeam 12 can be the seat beam of the vehicle. The seat beam refers to a beam used to connect seats in a vehicle.

[0088] The aluminum layer refers to a structural layer made of aluminum or an alloy containing aluminum.

[0089] The first aluminum layer 111 refers to the aluminum layer used in the cover plate 11 , and the second aluminum layer 121 refers to the aluminum layer used in the crossbeam 12 .

[0090] The welding surface 1111 refers to the surface of the first aluminum layer 111 of the cover plate 11 used for welding to the crossbeam 12 .

[0091] The contact surface 1211 refers to the surface of the second aluminum layer 121 of the beam 12 that contacts the cover plate 11. When the beam 12 is mounted on the cover plate 11, the contact surface 1211 of the beam 12 contacts and connects with the welding surface 1111 of the cover plate 11 to support the beam 12 on the cover plate 11.

[0092] The welding surface 1111 is located in the first aluminum layer 111, and the contact surface 1211 is located in the second aluminum layer 121. The contact surface 1211 and the welding surface 1111 contain the same material. When the welding surface 1111 and the contact surface 1211 are welded, the materials of the first aluminum layer 111 and the second aluminum layer 121 can better melt and penetrate each other to form a whole. This can make the welding between the welding surface 1111 and the contact surface 1211 more secure, and less likely to crack when subjected to hot and cold expansion, which can improve the welding effect and strength.

[0093] In the technical solution of the embodiment of the present application, a first aluminum layer 111 is provided on the cover plate 11, and a welding surface 1111 is provided on the first aluminum layer 111; a second aluminum layer 121 is provided on the beam 12, and a contact surface 1211 is provided on the second aluminum layer 121; the welding surface 1111 and the contact surface 1211 are welded together to fix the beam 12 on the cover plate 11; the welding effect is better and the connection strength is higher, thereby more reliably integrating the beam 12 into the box body 100 of the battery 1001.

[0094] In some embodiments, the contact surface 1211 and the welding surface 1111 are continuously welded to each other along at least a portion of the length direction of the beam 12 .

[0095] Continuous welding, also known as continuous welding, is the opposite of spot welding and short-segment welding. Continuous welding refers to connecting one weld point to another without interruption. If the weld is made up of separate weld points, it is called spot welding. If the weld is made up of separate, small sections, it is called segmented welding or distributed welding.

[0096] Connecting the contact surface 1211 and the welding surface 1111 by continuous welding in at least a portion of the area can improve the connection strength between the contact surface 1211 and the welding surface 1111 , thereby improving the connection strength between the cover plate 11 and the beam 12 .

[0097] In some embodiments, the contact surface 1211 and the welding surface 1111 are connected by brazing or laser welding.

[0098] Brazing is a metal joining method that heats and melts a filler metal on the metal surface, and then allows the filler metal to diffuse into the workpiece surface metal to form a joint.

[0099] Laser welding is a high-energy-density welding technique that uses a laser beam to heat the metal material to its melting point and then welds it by flowing the molten metal. In some cases, filler metal can also be added during laser welding.

[0100] Brazing or laser welding the contact surface 1211 and the welding surface 1111 is not only convenient for welding, but also has high connection strength and more stable connection.

[0101] See also Figure 6 The crossbeam 12 may include only the second aluminum layer 121 , that is, the crossbeam 12 is made of aluminum; the cover plate 11 includes the first aluminum layer 111 , and the second aluminum layer 121 is connected to the first aluminum layer 111 to achieve the connection between the crossbeam 12 and the cover plate 11 .

[0102] See also Figures 7 to 13 In some embodiments, the crossbeam 12 includes a first structural layer 122 , and a second aluminum layer 121 is provided on a side of the first structural layer 122 close to the cover plate 11 .

[0103] The first structural layer 122 is the structural layer used to form the crossbeam 12. The first structural layer 122 can be made of metal, such as aluminum alloy, steel, manganese alloy, or a higher-strength material such as carbon fiber. The crossbeam 12 uses the first structural layer 122 to form the main body of the crossbeam 12, thereby providing the crossbeam 12 with good structural strength.

[0104] The second aluminum layer 121 can be disposed on the first structural layer 122 by bonding, welding, electroplating, etc., so that the beam 12 has good welding performance.

[0105] The crossbeam 12 is provided with a first structural layer 122 to ensure that the crossbeam 12 has good structural strength and supports the second aluminum layer 121 .

[0106] In some embodiments, first structural layer 122 is a steel layer.

[0107] The steel layer refers to the structural layer made of steel.

[0108] The first structural layer 122 uses a steel layer, which can make the structural strength of the beam 12 higher and also facilitate the processing and forming of the beam 12. For example, the beam 12 can be produced by stamping, casting, forging, extrusion, etc.

[0109] In some embodiments, the first structural layer 122 is a steel layer, and the crossbeam 12 can be made of a steel-aluminum composite material, such as a steel-aluminum composite plate that is stamped to facilitate the processing and manufacturing of the crossbeam 12 .

[0110] In some embodiments, see Figures 7 to 12 The beam 12 is provided with a second aluminum layer 121 at least in the area corresponding to the contact surface 1211 .

[0111] The beam 12 is provided with a second aluminum layer 121 at least in the area corresponding to the contact surface 1211, which means that the surface area of ​​the second aluminum layer 121 on the side close to the cover plate 11 is greater than or equal to the area of ​​the contact surface 1211. For example, the entire beam 12 is provided with a second aluminum layer 121, or the second aluminum layer 121 is provided on a partial area of ​​the beam 12, as long as the contact surface 1211 is located on the second aluminum layer 121.

[0112] like Figure 7 、 Figure 9 and Figure 12 As shown, the area of ​​the second aluminum layer 121 is larger than the area of ​​the contact surface 1211 , and the contact surface 1211 is only the area of ​​the portion of the second aluminum layer 121 that contacts the cover plate 11 .

[0113] like Figure 8 and Figure 11 As shown, the area of ​​the second aluminum layer 121 is equal to the area of ​​the contact surface 1211, that is, the second aluminum layer 121 is provided only on the portion of the beam 12 that contacts the cover plate 11, so that the contact surface 1211 is formed on both sides of the second aluminum layer 121 that contact the cover plate 11. This structure can reduce material usage, reduce the weight of the beam 12, and thus reduce the weight of the battery 1001.

[0114] The second aluminum layer 121 is provided in a partial area of ​​the crossbeam 12 , which facilitates the production of the crossbeam 12 while facilitating the provision of the contact surface 1211 .

[0115] See also Figures 9 to 12 In some embodiments, the cover plate 11 is provided with a first aluminum layer 111 at least in the area corresponding to the welding surface 1111 .

[0116] The cover plate 11 is provided with a first aluminum layer 111 at least in the area corresponding to the welding surface 1111, which means that the surface area of ​​the first aluminum layer 111 on the side close to the beam 12 is greater than or equal to the area of ​​the welding surface 1111. For example, the first aluminum layer 111 is provided on the entire cover plate 11, or the first aluminum layer 111 is provided on a partial area of ​​the cover plate 11, as long as the welding surface 1111 is located on the first aluminum layer 111.

[0117] like Figure 9 and Figure 12As shown, the area of ​​the first aluminum layer 111 is larger than the area of ​​the welding surface 1111 , and the welding surface 1111 is only the area of ​​the portion of the first aluminum layer 111 that contacts the beam 12 .

[0118] like Figure 10 and Figure 11 As shown, the area of ​​the first aluminum layer 111 is equal to the area of ​​the welding surface 1111, that is, the first aluminum layer 111 is set only on the part of the cover plate 11 that contacts the beam 12, so that the welding surface 1111 is formed on the side where the first aluminum layer 111 contacts the beam 12. This structure can reduce material usage, reduce the weight of the cover plate 11, and thus reduce the weight of the battery 1001.

[0119] The first aluminum layer 111 is provided in a partial area of ​​the cover plate 11 , which facilitates the production of the cover plate 11 while facilitating the provision of the welding surface 1111 .

[0120] See also Figures 9 to 13 In some embodiments, the cover plate 11 includes a second structural layer 112 , and a first aluminum layer 111 is provided on the second structural layer 112 .

[0121] The second structural layer 112 is the structural layer used to form the cover plate 11. The second structural layer 112 can be made of metal, such as aluminum alloy, steel, manganese alloy, or carbon fiber. The second structural layer 112 is used to provide the cover plate 11 with good structural strength.

[0122] The first aluminum layer 111 can be disposed on the second structural layer 112 by bonding, welding, electroplating, etc., so that the cover plate 11 has good welding performance.

[0123] The cover plate 11 is provided with a second structural layer 112 to ensure that the cover plate 11 has good structural strength and supports the first aluminum layer 111 .

[0124] In some embodiments, the second structural layer 112 is a steel layer.

[0125] The steel layer refers to the structural layer made of steel.

[0126] The second structural layer 112 is made of a steel layer, which can increase the structural strength of the cover plate 11 and facilitate the processing, forming and manufacturing of the cover plate 11 .

[0127] In some embodiments, the second structural layer 112 is a steel layer, and the cover plate 11 can be made of a steel-aluminum composite material, such as a steel-aluminum composite plate that is stamped to facilitate the processing and production of the cover plate 11.

[0128] See also Figures 9 to 11 In some embodiments, the first aluminum layer 111 is located on a side of the second structural layer 112 close to the beam 12 .

[0129] The first aluminum layer 111 is provided on a side of the second structural layer 112 close to the crossbeam 12 , so that a welding surface 1111 of the first aluminum layer 111 is welded to the second aluminum layer 121 of the crossbeam 12 .

[0130] See also Figure 12 In some embodiments, the first aluminum layer 111 is located on a side of the second structural layer 112 away from the beam 12 , and an opening 1121 exposing the first aluminum layer 111 is provided on the second structural layer 112 in a region corresponding to the welding surface 1111 .

[0131] The opening 1121 refers to a through hole or a window structure provided on the second structural layer 112 .

[0132] A first aluminum layer 111 is provided on the side of the second structural layer 112 facing away from the beam 12, and the first aluminum layer 111 can be protected by the second structural layer 112; and an opening 1121 is provided on the second structural layer 112 to expose the welding surface 1111 of the first aluminum layer 111 so as to be welded to the second aluminum layer 121 of the beam 12.

[0133] See also Figure 13 In some embodiments, the cover plate 11 may not only use a composite structure made of two structural layers formed by a first aluminum layer 111 and a second structural layer 112, but may also use a composite structure of three or four structural layers, such as a third structural layer 113 made of aluminum, steel, copper or other materials, and the third structural layer 113 may be arranged on the side of the second structural layer 112 away from the first aluminum layer 111.

[0134] See also Figure 13 In some embodiments, the crossbeam 12 can not only use a composite structure made of two structural layers formed by the second aluminum layer 121 and the first structural layer 122, but also use a composite structure of three or four structural layers, such as a fourth structural layer 123 made of aluminum, steel, copper or other materials. The fourth structural layer 123 can be arranged on the side of the first structural layer 122 away from the second aluminum layer 121.

[0135] See also Figure 9 The second structural layer 112 is a steel layer, and the cover plate 11 is made of a steel-aluminum composite structural material. That is, the cover plate 11 includes a second structural layer 112 and a first aluminum layer 111, which are stacked together. The thickness H11 of the second structural layer 112 is greater than the thickness H12 of the first aluminum layer 111. Setting the thickness H11 of the second structural layer 112 to be larger can increase the structural strength of the cover plate 11, while setting the thickness H12 of the first aluminum layer 111 to be smaller can facilitate processing and manufacturing, and also facilitate welding connection with the crossbeam 12.

[0136] In some embodiments, the thickness H11 of the second structural layer 112 ranges from 0.5 mm to 2 mm. For example, the thickness H11 of the second structural layer 112 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.7 mm, 0.8 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc., so that the manufactured cover plate 11 has good structural strength and is relatively light in weight.

[0137] In some embodiments, the thickness H12 of the first aluminum layer 111 ranges from 0.05mm to 0.5mm. For example, the thickness H12 of the first aluminum layer 111 can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc., to facilitate the production of the material of the cover 11 and to facilitate welding with the beam 12.

[0138] See also Figure 9 First structural layer 122 is a steel layer, and crossbeam 12 is made of a steel-aluminum composite structural material. That is, crossbeam 12 includes a first structural layer 122 and a second aluminum layer 121, which are stacked together. The thickness H21 of first structural layer 122 is greater than the thickness H22 of second aluminum layer 121. Setting the thickness H21 of first structural layer 122 larger can increase the structural strength of crossbeam 12, while setting the thickness H22 of second aluminum layer 121 smaller can facilitate processing and manufacturing, and also facilitate welding connection to crossbeam 12.

[0139] In some embodiments, the thickness H21 of the first structural layer 122 ranges from 0.5 mm to 2 mm. For example, the thickness H21 of the first structural layer 122 can be 0.5 mm, 0.6 mm, 0.7 mm, 0.7 mm, 0.8 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc., so that the manufactured beam 12 has good structural strength and is relatively light in weight.

[0140] In some embodiments, the thickness H22 of the second aluminum layer 121 ranges from 0.05mm to 0.5mm. For example, the thickness H22 of the second aluminum layer 121 can be 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, etc., to facilitate the production of the material of the beam 12 and to facilitate welding to the beam 12.

[0141] See also Figure 2 、 Figure 3 and Figure 14In some embodiments, the box body 100 further includes a heat conducting plate 13 , which is stacked with the cover plate 11 . The heat conducting plate 13 is located on a side of the cover plate 11 close to the accommodating cavity 10 , and a flow channel 110 is formed between the heat conducting plate 13 and the cover plate 11 .

[0142] The flow channel 110 refers to a passage for fluid to flow through.

[0143] The heat conducting plate 13 is a plate made of heat conducting materials such as aluminum, steel, and copper.

[0144] A heat conducting plate 13 is stacked on the side of the cover plate 11 close to the accommodating cavity 10, and a flow channel 110 is formed between the cover plate 11 and the heat conducting plate 13. A coolant supply system can be connected to allow the coolant to flow through the flow channel 110, thereby controlling the temperature of the cover plate 11 and further controlling the temperature of the battery 1001.

[0145] In some embodiments, the heat conducting plate 13 is an aluminum plate or a steel-aluminum composite plate, and the heat conducting plate 13 is welded to the first aluminum layer 111 .

[0146] Aluminum sheet refers to a sheet made of aluminum. Steel-aluminum composite panels are composite panels made by stacking steel and aluminum layers. The steel and aluminum layers can be formed by bonding or pressing steel and aluminum sheets together to form a multi-layer composite structure, or by coating steel with aluminum.

[0147] The heat conducting plate 13 is welded to the first aluminum layer 111 , so that the aluminum material of the heat conducting plate 13 is welded to the first aluminum layer 111 , thereby facilitating the connection between the heat conducting plate 13 and the cover plate 11 and ensuring a firm connection between the heat conducting plate 13 and the cover plate 11 .

[0148] The heat conducting plate 13 is made of aluminum plate or steel-aluminum composite plate, and the heat conducting plate 13 is welded to the first aluminum layer 111, so that the inner wall of the formed flow channel 110 is all aluminum layer, which not only has good heat conduction effect, but also makes the inner wall of the formed flow channel 110 have good corrosion resistance.

[0149] In some embodiments, the flow channel 110 may also be manufactured separately, such as by bending a pipe to form the flow channel 110 , and then fixing the pipe to the cover plate 11 to provide the flow channel 110 structure on the cover plate 11 .

[0150] See also Figures 3 to 5 In some embodiments, the crossbeam 12 is provided with a cavity 120 extending along its length to reduce the weight of the crossbeam 12 .

[0151] In some embodiments, the crossbeam 12 can be formed by stamping a sheet metal, and the punched groove forms the cavity 120 of the crossbeam 12. Of course, the crossbeam 12 can also be cast or extruded to form the cavity 120 in the crossbeam 12.

[0152] See also Figure 3 、 Figure 5 and Figure 15 In some embodiments, the beam 12 is provided with a cavity 120 extending along its length, and a blocking portion 124 is provided at at least one end of the cavity 120 along its length.

[0153] The blocking portion 124 is a structural member provided at the end of the beam 12 to cover the end of the cavity 120. Providing the blocking portion 124 at the end of the beam 12 can increase the structural strength and reduce the risk of foreign matter entering the cavity 120.

[0154] A blocking portion 124 is provided at at least one end of the cavity 120 in the longitudinal direction, which means that the blocking portion 124 may be provided at one end of the beam 12 or at both ends of the beam 12 .

[0155] A cavity 120 is provided in the beam 12 to reduce the weight of the beam 12 ; and a sealing portion 124 is provided at the end of the cavity 120 to increase the structural strength of the beam 12 , thereby improving the structural strength of the battery, and reducing the risk of foreign matter entering the beam 12 .

[0156] In some embodiments, the cross beam 12 and the blocking portion 124 are an integrally formed structure.

[0157] The crossbeam 12 and the blocking portion 124 are integrally formed, meaning that the crossbeam 12 and the blocking portion 124 are integrally formed. For example, a sheet metal can be used, and the cavity 120 is punched out of the sheet metal. The ends of the cavity 120 are spaced a distance from the corresponding sides of the sheet metal, so that the ends of the cavity 120 have sidewalls, which can form the blocking portion 124. Of course, if the crossbeam 12 is cast, the blocking portion 124 can be directly cast at its end.

[0158] The cross beam 12 and the blocking portion 124 are integrally formed, which can be easily processed and manufactured.

[0159] In some embodiments, the blocking portion 124 may also be manufactured separately and then fixed on the beam 12 .

[0160] See also Figure 16 In some embodiments, a reinforcement 125 is provided at least at one end of the beam 12 in the length direction, and the reinforcement 125 is fixedly connected to the cover plate 11 .

[0161] The reinforcement member 125 refers to a structural member provided at the end of the cross beam 12 , which can be a plate, a block, a profile, etc. The reinforcement member 125 is provided at the end of the cross beam 12 to increase the structural strength of the cross beam 12 .

[0162] The end of the crossbeam 12 is provided with a reinforcement 125 to increase the structural strength of the crossbeam 12 and thereby enhance the structural strength of the battery.

[0163] In some embodiments, the reinforcement 125 can be integrally formed with the crossbeam 12 to facilitate processing and improve the structural strength of the crossbeam 12. Of course, the reinforcement 125 can also be made separately and then fixedly connected to the crossbeam 12.

[0164] According to some embodiments of the present application, the present application provides a battery 1001, including a battery cell 200, a box body 100 and a crossbeam 12, the battery cell 200 is placed in the box body 100, the box body 100 includes a accommodating cavity 10 and a cover plate 11, the cover plate 11 includes a first aluminum layer 111, the first aluminum layer 111 is located on the side of the cover plate 11 away from the accommodating cavity 10, and the first aluminum layer 111 has a welding surface 1111; the crossbeam 12 is arranged on the side of the cover plate 11 away from the accommodating cavity 10, the crossbeam 12 includes a first structural layer 122 and a second aluminum layer 121 arranged in a stacked manner, the second aluminum layer 121 is located on the side of the first structural layer 122 close to the cover plate 11, the first structural layer 122 is a steel layer, and the first aluminum layer 111 is provided with a welding surface 1111; the second aluminum layer 121 is provided with a contact surface 1211, and the contact surface 1211 is continuously welded to the welding surface 1111 along at least a partial area of ​​the length direction of the crossbeam 12.

[0165] The cover plate 11 includes a first aluminum layer 111, and the beam 12 uses a composite structure including a steel layer and a second aluminum layer 121, which has high structural strength; a welding surface 1111 is set on the first aluminum layer 111, and a contact surface 1211 is set on the second aluminum layer 121, and the contact surface 1211 and the welding surface 1111 are continuously welded together along at least a part of the length direction of the beam 12, which not only facilitates the welding connection between the contact surface 1211 and the welding surface 1111, but also makes the welding between the contact surface 1211 and the welding surface 1111 more stable and the connection strength higher, thereby improving the connection strength between the cover plate 11 and the beam 12.

[0166] According to some embodiments of the present application, the present application also provides an electrical device, comprising the battery described in any of the above solutions.

[0167] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0168] According to some embodiments of the present application, the present application also provides a vehicle, comprising the battery described in any of the above schemes, and a crossbeam connecting the seats of the vehicle.

[0169] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery for a vehicle, characterized in that: include: Battery cells; A box body, the box body comprising a receiving cavity and a cover plate, the battery cell being received in the box body, the cover plate sealing the receiving cavity, the cover plate comprising a first aluminum layer, the first aluminum layer being disposed on a side of the cover plate facing away from the receiving cavity, the first aluminum layer having a welding surface; a crossbeam, the crossbeam being disposed on a side of the cover plate facing away from the accommodating cavity, the crossbeam being used to connect to a seat of the vehicle, the crossbeam comprising a second aluminum layer having a contact surface; The contact surface is connected to the welding surface by welding.

2. The battery according to claim 1, wherein The crossbeam includes a first structural layer, and the second aluminum layer is provided on a side of the first structural layer close to the cover plate.

3. The battery according to claim 2, wherein The first structural layer is a steel layer.

4. The battery according to any one of claims 1 to 3, characterized in that The contact surface and the welding surface are continuously welded to each other along at least a partial area in the length direction of the beam.

5. The battery according to any one of claims 1 to 4, characterized in that The contact surface and the welding surface are connected by brazing or laser welding.

6. The battery according to any one of claims 1 to 5, characterized in that The second aluminum layer is provided on the beam at least in a region corresponding to the contact surface.

7. The battery according to any one of claims 1 to 6, characterized in that The cover plate is provided with the first aluminum layer at least in the area corresponding to the welding surface.

8. The battery according to any one of claims 1 to 7, characterized in that The cover plate includes a second structural layer, and the first aluminum layer is provided on the second structural layer.

9. The battery according to claim 8, wherein The first aluminum layer is located on a side of the second structural layer close to the crossbeam; Alternatively, the first aluminum layer is located on a side of the second structural layer facing away from the crossbeam, and an opening is provided on the second structural layer in a region corresponding to the welding surface to expose the first aluminum layer.

10. The battery according to any one of claims 8 to 9, characterized in that The second structural layer is a steel layer.

11. The battery according to any one of claims 1 to 9, characterized in that The box body further includes a heat conducting plate, which is stacked with the cover plate. The heat conducting plate is located on a side of the cover plate close to the accommodating cavity, and a flow channel is formed between the heat conducting plate and the cover plate.

12. The battery according to claim 11, wherein The heat conducting plate is an aluminum plate or a steel-aluminum composite plate, and the heat conducting plate is welded to the first aluminum layer.

13. The battery according to any one of claims 1 to 12, characterized in that The crossbeam is provided with a cavity along its length direction, and at least one end of the cavity along its length direction is provided with a blocking portion.

14. The battery according to claim 13, wherein The cross beam and the blocking portion are an integrally formed structure.

15. The battery according to any one of claims 1 to 14, characterized in that A reinforcement is provided at at least one end of the beam in the length direction, and the reinforcement is fixedly connected to the cover plate.

16. A vehicle, characterized in that: The battery according to any one of claims 1 to 15 is included, and the crossbeam is connected to a seat of the vehicle.

Images