Case, battery, and electric device

Abstract

A case (10), a battery (100), and an electric device. The case (10) comprises a plate assembly (111). The plate assembly (111) comprises a first plate member (1111) and a second plate member (1112) that are stacked. The first plate member (1111) comprises a first plate body (11111) and a first frame edge portion (11112) connected to a side edge of the first plate body (11111). The second plate member (1112) comprises a second plate body (11121) and a second frame edge portion (11122) connected to a side edge of the second plate body (11121). The first frame edge portion (11112) is connected to the second frame edge portion (11122) to form a first edge beam structure (112). The first edge beam structure (112) defines an accommodating space (114) for accommodating a battery cell (20).

Description

Box, battery and electrical equipment

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202410256652.5, entitled “Box, Battery and Electrical Equipment”, filed on March 6, 2024, which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a box, a battery and an electrical device. Background Art

[0004] 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 part of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0005] A battery generally includes a case and battery cells. The battery cells are housed in the case, and the case protects the battery cells. However, the case has many parts, takes a long time to assemble, and has low assembly efficiency.

[0006] Summary of the Invention

[0007] One of the purposes of the embodiments of the present application is to provide a box, a battery and an electrical device, aiming to solve the technical problems in the related art of the box having a large number of parts, a long assembly time and low assembly efficiency.

[0008] In order to solve the above technical problems, the technical solution adopted in the embodiment of the present application is: a box body is provided, including a plate assembly, the plate assembly includes a first plate member and a second plate member stacked, the first plate member includes a first plate body and a first frame edge portion connected to the side of the first plate body, the second plate member includes a second plate body and a second frame edge portion connected to the side of the second plate body, the first frame edge portion and the second frame edge portion are connected to form a first side beam structure, and the first side beam structure defines a storage space for accommodating battery cells.

[0009] The beneficial effect of the box provided by the embodiment of the present application is that: the plate assembly in the box provided by the embodiment of the present application directly sets the first frame edge portion and the second frame edge portion on the first plate member and the second plate member respectively, and forms a first side beam structure by connecting the first frame edge portion and the second frame edge portion. In this way, a side beam structure is directly formed on the plate assembly, so that the plate assembly does not need to be connected to the side beam structure through additional fasteners, effectively reducing the number of parts of the box, thereby effectively simplifying the assembly process of the box and improving the assembly efficiency of the box.

[0010] In some embodiments of the present application, the first frame side portion includes a first steel layer, and the first steel layer constitutes at least a portion of the first side beam structure.

[0011] By adopting the above technical solution, the structural strength of the first side beam structure is effectively improved.

[0012] In some embodiments of the present application, the first frame edge portion further includes two first aluminum layers connected to the first plate body, and the two first aluminum layers cooperate to clamp the first steel layer along the stacking direction of the first plate and the second plate.

[0013] By adopting the above technical solution, the weight of the first plate is effectively reduced, thereby effectively improving the mass energy density of the battery.

[0014] In some embodiments of the present application, the first plate is an aluminum plate.

[0015] By adopting the above technical solution, not only is it convenient to connect the first frame edge portion with the first plate body, effectively improving the connection strength between the first frame edge portion and the first plate body, but the weight of the first plate is further reduced, thereby further improving the mass energy density of the battery.

[0016] In some embodiments of the present application, the second frame side portion includes a second steel layer, and the second steel layer constitutes at least a portion of the first side beam structure.

[0017] By adopting the above technical solution, the structural strength of the first side beam structure is effectively improved.

[0018] In some embodiments of the present application, the second frame edge portion further includes two second aluminum layers connected to the second plate body, and the two second aluminum layers cooperate to clamp the second steel layer along the stacking direction of the first plate and the second plate.

[0019] By adopting the above technical solution, the weight of the second plate is effectively reduced, thereby effectively improving the mass energy density of the battery.

[0020] In some embodiments of the present application, the second plate is an aluminum plate.

[0021] By adopting the above technical solution, not only is it convenient to connect the second frame edge portion with the second plate body, effectively improving the connection strength between the second frame edge portion and the second plate body, but the weight of the second plate is further reduced, thereby further improving the mass energy density of the battery.

[0022] In some embodiments of the present application, the first plate also includes a third frame edge portion, the first frame edge portion is connected to one side of the first plate body along the first direction, and the third frame edge portion is connected to one side of the first plate body along the second direction. The second plate also includes a fourth frame edge portion, the second frame edge portion is connected to one side of the second plate body along the first direction, and the fourth frame edge portion is connected to one side of the second plate body along the second direction. The third frame edge portion and the fourth frame edge portion are connected to form a second side beam structure, and the second side beam structure and the first side beam structure jointly define an accommodating space, wherein the first direction intersects with the second direction and is perpendicular to the stacking direction of the first plate and the second plate.

[0023] By adopting the above technical solution, the plate assembly and the second side beam structure do not need to be connected by fasteners, which effectively reduces the number of parts of the box, thereby effectively simplifying the assembly process of the box and improving the assembly efficiency of the box.

[0024] In some embodiments of the present application, the number of first frame edge portions, the number of second frame edge portions, the number of third frame edge portions and the number of fourth frame edge portions are two, the two first frame edge portions are arranged on opposite sides of the first plate body along the first direction, the two second frame edge portions are arranged on opposite sides of the second plate body along the first direction, the two first frame edge portions and the two second frame edge portions are arranged in a one-to-one correspondence to form two first side beam structures, the two third frame edge portions are arranged on opposite sides of the first plate body along the second direction, the two fourth frame edge portions are arranged in a one-to-one correspondence to form two second side beam structures, and the two first side beam structures and the two second side beam structures enclose to form a accommodating space.

[0025] By adopting the above technical solution, it is easy to form the outer frame of the box, so that the panel assembly and the outer frame do not need to be connected by fasteners, effectively reducing the number of parts of the box, thereby effectively simplifying the assembly process of the box and improving the assembly efficiency of the box.

[0026] In some embodiments of the present application, the third frame side portion includes a third steel layer, and the third steel layer constitutes at least a portion of the second side beam structure.

[0027] By adopting the above technical solution, the structural strength of the second side beam structure is effectively improved.

[0028] In some embodiments of the present application, the third frame edge portion further includes two third aluminum layers connected to the first plate body, and the two third aluminum layers cooperate to clamp the third steel layer along the stacking direction of the first plate and the second plate.

[0029] By adopting the above technical solution, the weight of the first plate is effectively reduced, thereby effectively improving the mass energy density of the battery.

[0030] In some embodiments of the present application, the fourth frame side portion includes a fourth steel layer, and the fourth steel layer constitutes at least a portion of the second side beam structure.

[0031] By adopting the above technical solution, the structural strength of the second side beam structure is effectively improved.

[0032] In some embodiments of the present application, the fourth frame edge further includes two fourth aluminum layers connected to the second plate, and the two fourth aluminum layers cooperate to clamp the fourth steel layer along the stacking direction of the first plate and the second plate.

[0033] By adopting the above technical solution, the weight of the second plate is effectively reduced, thereby effectively improving the mass energy density of the battery.

[0034] In some embodiments of the present application, the box body also includes a third plate stacked between the first plate and the second plate, the third plate includes a third plate body and a fifth frame edge connected to the side of the third plate body, the fifth frame edge extends to the inner cavity of the first side beam structure and is connected between the first frame edge and the second frame edge.

[0035] By adopting the above technical solution, the structural strength of the first side beam structure is further improved.

[0036] In some embodiments of the present application, the fifth frame side portion includes a fifth steel layer, and the fifth steel layer extends to the inner cavity of the first side beam structure.

[0037] By adopting the above technical solution, the structural strength of the first side beam structure is further improved.

[0038] In some embodiments of the present application, the fifth frame edge also includes two fifth aluminum layers connected to the third plate body, and the two fifth aluminum layers cooperate to clamp the fifth steel layer along the stacking direction of the first plate and the second plate.

[0039] By adopting the above technical solution, the weight of the third plate is effectively reduced, thereby effectively improving the mass energy density of the battery.

[0040] In some embodiments of the present application, the third plate is an aluminum plate.

[0041] By adopting the above technical solution, it is not only convenient to connect the fifth frame edge with the third plate body, effectively improving the connection strength between the fifth frame edge and the third plate body, but also further reducing the weight of the third plate, thereby further improving the mass energy density of the battery.

[0042] In some embodiments of the present application, the second plate body is arranged on the side of the third plate body facing away from the accommodating space, and an air guide channel is provided on the side of the second plate body facing the third plate body, and the air guide channel is connected to the external environment of the box body. A through hole is opened at the connection between the first plate body and the third plate body, and the air guide channel is connected to the accommodating space through the through hole.

[0043] By adopting the above technical solution, the second plate can be used as an air guide plate to facilitate the discharge of gas from the accommodating space of the box body when thermal runaway occurs in the battery.

[0044] In some embodiments of the present application, the first plate body and the third plate body are connected to form a heat exchange channel, and the heat exchange channel is used to accommodate a heat exchange medium to adjust the temperature of the battery cell.

[0045] By adopting the above technical solution, the first plate body and the third plate body can be connected to form a heat exchange plate, which is convenient for heat exchange of the battery cells accommodated in the accommodation space, so as to achieve temperature control of the battery cells.

[0046] In some embodiments of the present application, the first frame side portion and the fifth frame side portion are welded; and / or, the second frame side portion and the fifth frame side portion are welded.

[0047] By adopting the above technical solution, the first frame side portion and / or the second frame side portion is easily connected to the fifth frame side portion.

[0048] An embodiment of the present application further provides a battery, comprising the box body described in any of the above embodiments.

[0049] The beneficial effect of the battery provided by the embodiment of the present application is that: the battery provided by the embodiment of the present application effectively reduces the number of battery components due to the use of the battery cell described in any of the above embodiments, thereby effectively simplifying the battery assembly process and improving the battery assembly efficiency.

[0050] An embodiment of the present application also provides an electrical device including the above-mentioned battery.

[0051] The beneficial effect of the electrical equipment provided by the embodiment of the present application is that: since the electrical equipment provided by the embodiment of the present application adopts the above-mentioned battery, the number of parts of the electrical equipment is effectively reduced, thereby effectively simplifying the assembly process of the electrical equipment and improving the assembly efficiency of the electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] 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.

[0053] FIG1 is a schematic structural diagram of a vehicle provided in an embodiment of the present application;

[0054] FIG2 is a schematic diagram of an exploded structure of a battery in the vehicle shown in FIG1 ;

[0055] FIG3 is a schematic structural diagram of a first portion of a box in the battery shown in FIG2 ;

[0056] FIG4 is a schematic top view of the first portion of the box shown in FIG3 ;

[0057] FIG5 is a schematic cross-sectional view of the first portion of the box shown in FIG4 along line AA;

[0058] FIG6 is an enlarged structural diagram of point C of the first part of the box shown in FIG5 ;

[0059] FIG7 is an enlarged structural diagram of point D of the first part of the box shown in FIG5 ;

[0060] FIG8 is an enlarged structural diagram of point E of the first part of the box shown in FIG5 ;

[0061] FIG9 is a schematic cross-sectional view of the first portion of the housing shown in FIG4 along line BB;

[0062] FIG10 is an enlarged structural diagram of point F of the first part of the box shown in FIG9 ;

[0063] FIG11 is an enlarged structural diagram of point G of the first part of the box shown in FIG9 .

[0064] Description of reference numerals:

[0065] 1000. Vehicle;

[0066] 100, battery; 10, box; 11, first part; 111, plate assembly; 1111, first plate; 11111, first plate body; 11112, first frame edge; 11113, first steel layer; 11114, first aluminum layer; 11115, third frame edge; 11116, third steel layer; 11117, third aluminum layer; 1112, second plate; 11121, second plate body; 11122, second frame edge; 11123, second steel layer; 11124, second Aluminum layer; 11125, fourth frame edge; 11126, fourth steel layer; 11127, fourth aluminum layer; 11128, air guide channel; 11129, through hole; 1113, third plate; 11131, third plate; 11132, fifth frame edge; 11133, fifth steel layer; 11134, fifth aluminum layer; 11135, heat exchange channel; 112, first side beam structure; 113, second side beam structure; 114, accommodation space; 12, second portion; 20, battery cell;

[0067] 200, controller;

[0068] 300. Motor. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail 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.

[0070] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly on the other component or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", 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 description and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0071] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of the present application shown in the drawings are for illustrative purposes only and should not constitute any limitation on the present application.

[0072] The battery referred to in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. A battery generally includes a housing that encloses one or more battery cells. The housing can, to a certain extent, prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0073] In the related art, the box body usually includes a frame and a plate assembly. The frame defines a storage space for the box body, and the battery cells are accommodated in the storage space. The plate assembly cover is arranged at the opening of the frame to close the opening of the frame. The plate assembly is usually made of aluminum, and the frame is usually made of steel. Due to the different thermal expansion coefficients of aluminum and steel, they expand unevenly when heated during welding, which can easily cause problems such as cracks and deformation. Therefore, fasteners such as bolts, screws, and rivets are usually used to connect the plate assembly and the frame. In order to ensure a stable connection between the plate assembly and the frame and to achieve a good sealing effect, a plurality of fasteners are usually arranged around the opening of the frame and connect the plate assembly and the frame. However, this will result in an excessive number of parts for the box body, increase the assembly time of the box body, and thus reduce the assembly efficiency of the box body.

[0074] In order to reduce the number of parts of the box and improve the assembly efficiency of the box, the plate assembly in the box provided in the embodiment of the present application directly sets the first frame edge portion and the second frame edge portion on the first plate member and the second plate member respectively, and forms a first side beam structure by connecting the first frame edge portion and the second frame edge portion. In this way, the plate assembly and the first side beam structure do not need to be connected by fasteners, which effectively reduces the number of parts of the box, thereby effectively simplifying the assembly process of the box and improving the assembly efficiency of the box.

[0075] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical equipment using batteries. Among them, electrical equipment can be, but is not limited to, vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0076] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in an embodiment of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0077] In some embodiments of the present application, the battery 100 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 .

[0078] Please refer to Figure 2, which is an exploded schematic diagram of the battery 100 provided in an embodiment of the present application. The battery 100 includes a housing 10 and a battery cell 20, and the battery cell 20 is accommodated in the housing 10. The housing 10 is used to provide a storage space 114 for the battery cell 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, and the first portion 11 and the second portion 12 cover each other, and the first portion 11 and the second portion 12 jointly define a storage space 114 for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one end open, and the first portion 11 may be a plate-like structure, and the first portion 11 is covered on the open side of the second portion 12, so that the first portion 11 and the second portion 12 jointly define the storage space 114; the first portion 11 and the second portion 12 may also be hollow structures with one side open, and the open side of the first portion 11 is covered on the open side of the second portion 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0079] In some embodiments, the box 10 may serve as part of the chassis structure of the vehicle 1000. For example, a portion of the box 10 may form at least a portion of the floor of the vehicle 1000, or a portion of the box 10 may form at least a portion of the cross member and longitudinal member of the vehicle 1000.

[0080] In the battery 100, if there are multiple battery cells 20, the multiple battery cells 20 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 20 can be housed within the housing 10. Alternatively, the battery 100 can be constructed by first connecting multiple battery cells 20 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 and housed within the housing 10. The battery 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0081] Each battery cell 20 may be a secondary battery or a primary battery. A secondary battery refers to a battery cell 20 that can be recharged to activate the active material after discharge and continue to be used. A primary battery refers to a battery cell 20 that cannot be recharged to activate the active material after the battery cell 20's power is exhausted and continues to be used. The battery cell 20 may also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., but is not limited thereto. The battery cell 20 may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell 20 of another shape. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal prismatic battery cells. Polygonal prismatic battery cells, for example, hexagonal prismatic battery cells, are not particularly limited in this application.

[0082] The battery cell 20 in the embodiment of the present application includes an electrode assembly and a housing, and the electrode assembly is installed in the housing to protect the electrode assembly.

[0083] The electrode assembly is also called a battery cell. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet and a separator. The electrode assembly mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The part of the positive electrode collector that is not coated with the positive electrode active material layer protrudes from the part that is coated with the positive electrode active material layer. The part that is not coated with the positive electrode active material layer serves as the positive electrode tab, or a metal conductor is welded on the positive electrode collector and led out to serve as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be, but is not limited to, lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganese oxide, etc.

[0084] The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The portion of the negative electrode current collector not coated with the negative electrode active material layer protrudes from the portion coated with the negative electrode active material layer. The portion not coated with the negative electrode active material layer serves as the negative electrode tab. Alternatively, a metal conductor is welded to the negative electrode current collector and extended to serve as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be, but is not limited to, carbon, silicon, and the like.

[0085] In order to ensure that a large current can pass without melting to a certain extent, there are multiple positive electrode tabs and they are stacked together, and there are multiple negative electrode tabs and they are stacked together.

[0086] The electrode assembly can be a wound structure or a laminated structure. The embodiments of the present application are not limited to this. The wound structure is mostly to weld the tabs to the current collector, and then arrange them in the order of positive electrode sheet - diaphragm - negative electrode sheet - diaphragm; and then form a cylindrical or square battery cell by winding. The laminated structure is mostly to lead out the tabs on the current collector, arrange the positive electrode sheet, negative electrode sheet and diaphragm in the order of positive electrode sheet - diaphragm - negative electrode sheet - diaphragm, and stack them together layer by layer to form a laminated battery cell; wherein, the diaphragm can be cut and directly laminated with the diaphragm sheet, or the diaphragm is not cut, but is folded in a Z shape. The material of the diaphragm can be but is not limited to PP (PolypropylFnF, polypropylene), PF (PolyFthylFnF, polyethylene), etc. The separator is an insulating film placed between the positive and negative electrodes. Its primary function is to separate the positive and negative electrodes and prevent electrons from freely passing through the battery cell 20, thus preventing short circuits to a certain extent. However, it allows ions in the electrolyte to pass freely between the positive and negative electrodes, forming a circuit between the positive and negative electrodes. The positive and negative electrodes are collectively referred to as electrodes. The positive and negative electrode tabs are collectively referred to as tabs.

[0087] The outer shell refers to a housing structure with a space inside that accommodates and protects the electrode assembly. The outer shell can be made of a material with a certain degree of hardness and strength. This prevents deformation when subjected to compression or collision, thus providing the battery cell 20 with greater structural strength and improved reliability. The outer shell can be made of, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and the like.

[0088] The outer casing of the battery cell 20 is provided with electrode terminals. Electrode terminals are conductive components mounted on the outer casing. They connect to the tabs of the electrode assembly to output power from the battery cell 20 or charge the battery cell 20. A battery cell 20 generally has two electrode terminals, one connected to the positive and one connected to the negative tab of the electrode assembly, respectively. The electrode terminal connected to the positive tab is the positive electrode terminal, and the electrode terminal connected to the negative tab is the negative electrode terminal.

[0089] In some embodiments, the battery cell 20 also includes a pressure relief mechanism, which is disposed on the outer shell of the battery cell 20 so that when the temperature or pressure of the battery cell 20 exceeds a safety threshold, the gas or liquid inside the battery cell 20 can be released to relieve the pressure inside the battery cell 20 and reduce the risk of explosion of the battery cell 20.

[0090] Referring to Figure 3 , the housing 10 has a height, a length, and a width. The height of the housing 10 can be seen in the Z direction shown in Figure 3 , the width of the housing 10 can be seen in the Y direction shown in Figure 3 , and the length of the housing 10 can be seen in the X direction shown in Figure 3 . The length of the battery 100 can be greater or smaller than its width. The housing 10 defines the external structure of the battery 100. The height of the housing 10 is the height of the battery 100, the length of the housing 10 is the length of the battery 100, and the width of the housing 10 is the width of the battery 100.

[0091] The box body 10 provided in the embodiment of the present application is described below with reference to the accompanying drawings.

[0092] First, please refer to Figures 3 to 6 together. An embodiment of the present application provides a box body 10, including a plate assembly 111, the plate assembly 111 includes a first plate 1111 and a second plate 1112 stacked, the first plate 1111 includes a first plate body 11111 and a first frame edge portion 11112 connected to the side of the first plate body 11111, the second plate 1112 includes a second plate body 11121 and a second frame edge portion 11122 connected to the side of the second plate body 11121, the first frame edge portion 11112 and the second frame edge portion 11122 are connected to form a first side beam structure 112, and the first side beam structure 112 defines a accommodating space 114 for accommodating the battery cell 20.

[0093] The plate assembly 111 is a component for closing the accommodating space 114 of the box body 10. The plate assembly 111 can constitute the above-mentioned first part 11 or the above-mentioned second part 12. The following description takes the plate assembly 111 constituting the above-mentioned first part 11 as an example.

[0094] First plate 1111 and second plate 1112 are two parts of plate assembly 111. First plate 1111 and second plate 1112 can be made of one or more metal materials, including but not limited to aluminum, aluminum alloy, iron, stainless steel, copper, etc. The material of first plate 1111 and second plate 1112 can be the same or different.

[0095] The stacking arrangement of the first plate 1111 and the second plate 1112 means that: in the thickness direction of the plate assembly 111, the first plate 1111 and the second plate 1112 are stacked together, and the thickness direction of the plate assembly 111 can be the height direction of the battery 100, that is, the stacking direction of the first plate 1111 and the second plate 1112 is the height direction of the battery 100.

[0096] In some embodiments, in the height direction of the battery 100, the plate assembly 111 is arranged below the battery cell 20, and the second plate 1112 is stacked on the side of the first plate 1111 facing the above-mentioned accommodating space 114, and the battery cell 20 is placed on the second plate 1112 to support the battery cell 20.

[0097] In other embodiments, in the height direction of the battery 100, the plate assembly 111 is arranged above the battery cell 20, the second plate 1112 is stacked on the side of the first plate 1111 facing the above-mentioned accommodating space 114, and the battery cell 20 is connected to the second plate 1112 to support the battery cell 20.

[0098] The first plate body 11111 is the main body of the first plate member 1111. The first plate body 11111 can be a flat plate or a plate with a concave-convex structure. For example, a concave structure and / or a convex structure is provided on the surface of the first plate body 11111. The second plate body 11121 is the main body of the second plate member 1112. The second plate body 11121 can be a flat plate or a plate with a concave-convex structure. For example, a concave structure and / or a convex structure is provided on the surface of the second plate body 11121. In the thickness direction of the plate assembly 111, the first plate body 11111 and the second plate body 11121 are stacked together. The first plate body 11111 and the second plate body 11121 can be connected to each other in a close-fitting manner or can be spaced apart from each other.

[0099] The first frame edge portion 11112 is the edge of the first plate 1111, and the second frame edge portion 11122 is the edge of the second plate 1112. The first frame edge portion 11112 and the second frame edge portion 11122 are connected to form the first side beam structure 112. The first side beam structure 112 is part of the outer frame structure of the box body 10 and is used to define the above-mentioned accommodation space 114. At least a portion of at least one of the first frame edge portion 11112 and the second frame edge portion 11122 is a profile structure. The first frame edge portion 11112 and the second frame edge portion 11122 together enclose an inner cavity of the first side beam structure 112.

[0100] In some embodiments, the first frame edge portion 11112 includes a first main body and two first connectors, one first connector is connected between the first plate 11111 and the first main body, and the other first connector is connected to the side of the first main body facing away from the first plate 11111, and the first main body is a profile structure. The second frame edge portion 11122 includes a second main body and two second connectors, one second connector is connected between the second plate 11121 and the second main body, and the other second connector is connected to the side of the second main body facing away from the second plate 11121, and the second main body is a profile structure. The two first connectors are connected one-to-one with the two second connectors, and the first main body and the second main body together enclose the inner cavity of the first side beam structure 112. It should be noted that the first connector and the second connector can be directly connected or indirectly connected, and the connection method between the first connector and the second connector can be but is not limited to welding, bonding, etc.

[0101] Of course, in other embodiments, the first body may be a flat plate structure and the second body may be a profile structure, or the first body may be a profile structure and the second body may be a flat plate structure.

[0102] The plate assembly 111 in the box body 10 provided in the embodiment of the present application directly sets the first frame edge portion 11112 and the second frame edge portion 11122 on the first plate 1111 and the second plate 1112 respectively, and forms a first side beam structure 112 by connecting the first frame edge portion 11112 and the second frame edge portion 11122. In this way, a side beam structure is directly formed on the plate assembly 111, so that the plate assembly 111 does not need to be additionally connected to the side beam structure through fasteners, effectively reducing the number of parts of the box body 10, thereby effectively simplifying the assembly process of the box body 10 and improving the assembly efficiency of the box body 10.

[0103] In some embodiments of the present application, please refer to FIG. 5 and FIG. 7 , the first frame edge portion 11112 includes a first steel layer 11113 , and the first steel layer 11113 constitutes at least a portion of the first side beam structure 112 .

[0104] The first steel layer 11113 is a layer made of steel. The first steel layer 11113 may constitute only a part or all of the above-mentioned first main body, or only a part or all of the above-mentioned first connector, or a part or all of the above-mentioned first main body and a part or all of the above-mentioned first connector.

[0105] By adopting the above technical solution, the structural strength of the first side beam structure 112 is effectively improved.

[0106] In some embodiments of the present application, please refer to Figures 5 and 7 together. The first frame edge 11112 also includes two first aluminum layers 11114 connected to the first plate 11111. The two first aluminum layers 11114 cooperate to clamp the first steel layer 11113 along the stacking direction of the first plate 1111 and the second plate 1112.

[0107] The first aluminum layer 11114 is a layer made of aluminum. The two first aluminum layers 11114 cooperate to clamp the first steel layer 11113 along the stacking direction of the first plate 1111 and the second plate 1112. That is, the two first aluminum layers 11114 cooperate to clamp the first steel layer 11113 along the thickness direction of the plate assembly 111. The first aluminum layer 11114 and the first plate 11111 can be an integral connecting member or a separate connecting member.

[0108] Compared with steel, aluminum has a smaller mass under the same volume. By adopting the above technical solution, the weight of the first plate 1111 is effectively reduced, thereby effectively improving the mass energy density of the battery 100.

[0109] In some embodiments of the present application, the first plate 11111 is an aluminum plate.

[0110] In other words, the first plate 11111 is made of aluminum.

[0111] In some embodiments, the first plate 1111 can be rolled from a steel plate and two aluminum plates. Specifically, the steel plate is placed between the two aluminum plates so that the two aluminum plates clamp the steel plate, and the steel plate is located at the edge of the aluminum plate. The steel plate and the two aluminum plates are rolled, and the middle parts of the two aluminum plates are extruded and combined to form the first plate body 11111. The edges of the two aluminum plates clamp the steel plate and are extruded and combined with the steel plates to form the first frame edge 11112.

[0112] Of course, in other embodiments, the first plate 1111 may also be formed by first rolling a steel plate and two aluminum plates to form the first frame edge portion 11112 , and then connecting the two first aluminum layers 11114 to the first plate 11111 .

[0113] By adopting the above technical solution, not only is it convenient to connect the first frame edge portion 11112 with the first plate body 11111, effectively improving the connection strength between the first frame edge portion 11112 and the first plate body 11111, but also the weight of the first plate 1111 is further reduced, thereby further improving the mass energy density of the battery 100.

[0114] In some embodiments of the present application, please refer to FIG. 5 and FIG. 7 , the second frame side portion 11122 includes a second steel layer 11123 , and the second steel layer 11123 constitutes at least a portion of the first side beam structure 112 .

[0115] The second steel layer 11123 is a layer made of steel. The second steel layer 11123 can constitute only a part or all of the above-mentioned second main body, or only a part or all of the above-mentioned second connecting body, or a part or all of the above-mentioned second main body and a part or all of the above-mentioned second connecting body.

[0116] By adopting the above technical solution, the structural strength of the first side beam structure 112 is effectively improved.

[0117] In some embodiments of the present application, please refer to Figures 5 and 7 together. The second frame edge 11122 also includes two second aluminum layers 11124 connected to the second plate 11121. The two second aluminum layers 11124 cooperate to clamp the second steel layer 11123 along the stacking direction of the first plate 1111 and the second plate 1112.

[0118] The second aluminum layer 11124 is a layer made of aluminum. The two second aluminum layers 11124 cooperate to clamp the second steel layer 11123 along the stacking direction of the first plate 1111 and the second plate 1112. That is, the two second aluminum layers 11124 cooperate to clamp the second steel layer 11123 along the thickness direction of the plate assembly 111. The second aluminum layer 11124 and the second plate 11121 can be an integral connecting member or a separate connecting member.

[0119] Compared with steel, aluminum has a smaller mass under the same volume. By adopting the above technical solution, the weight of the second plate 1112 is effectively reduced, thereby effectively improving the mass energy density of the battery 100.

[0120] In some embodiments of the present application, the second plate 11121 is an aluminum plate.

[0121] In other words, the second plate 11121 is made of aluminum.

[0122] In some embodiments, the second plate 1112 can be rolled from a steel plate and two aluminum plates. Specifically, the steel plate is placed between the two aluminum plates so that the two aluminum plates clamp the steel plate, and the steel plate is located at the edge of the aluminum plate. The steel plate and the two aluminum plates are rolled, and the middle parts of the two aluminum plates are extruded and combined to form the second plate body 11121. The edges of the two aluminum plates clamp the steel plate and are extruded and combined with the steel plates to form the second frame edge 11122.

[0123] Of course, in other embodiments, the second plate 1112 may also be formed by first rolling a steel plate and two aluminum plates to form the second frame edge portion 11122 , and then connecting the two second aluminum layers 11124 to the second plate 11121 .

[0124] By adopting the above technical solution, it is not only convenient to connect the second frame edge 11122 with the second plate body 11121, effectively improving the connection strength between the second frame edge 11122 and the second plate body 11121, but also further reducing the weight of the second plate 1112, thereby further improving the mass energy density of the battery 100.

[0125] In some embodiments of the present application, please refer to Figures 3, 4, 9 and 10 together. The first plate 1111 also includes a third frame edge 11115, the first frame edge 11112 is connected to one side of the first plate body 11111 along the first direction, and the third frame edge 11115 is connected to one side of the first plate body 11111 along the second direction. The second plate 1112 also includes a fourth frame edge 11125, the second frame edge 11122 is connected to one side of the second plate body 11121 along the first direction, and the fourth frame edge 11125 is connected to one side of the second plate body 11121 along the second direction. The third frame edge 11115 and the fourth frame edge 11125 are connected to form a second side beam structure 113, and the second side beam structure 113 and the first side beam structure 112 jointly define a accommodating space 114, wherein the first direction intersects with the second direction and is perpendicular to the stacking direction of the first plate 1111 and the second plate 1112.

[0126] The first frame edge portion 11112 is the edge portion of the first plate 1111 along the first direction, the third frame edge portion 11115 is the edge portion of the first plate 1111 along the second direction, the second frame edge portion 11122 is the edge portion of the second plate 1112 along the first direction, and the fourth frame edge portion 11125 is the edge portion of the second plate 1112 along the second direction. The third frame edge portion 11115 and the fourth frame edge portion 11125 are connected to form the second side beam structure 113. The second side beam structure 113 is another part of the outer frame structure of the box body 10. The second side beam structure 113 and the first side beam structure 112 jointly define the above-mentioned accommodation space 114. At least a portion of at least one of the third frame edge portion 11115 and the fourth frame edge portion 11125 is a profile structure, and the third frame edge portion 11115 and the fourth frame edge portion 11125 jointly enclose and form the inner cavity of the second side beam structure 113.

[0127] In some embodiments, the third frame edge portion 11115 includes a third main body and two third connectors, one third connector is connected between the first plate 11111 and the third main body, and the other third connector is connected to the side of the third main body facing away from the first plate 11111, and the third main body is a profile structure. The fourth frame edge portion 11125 includes a fourth main body and two fourth connectors, one fourth connector is connected between the second plate 11121 and the fourth main body, and the other fourth connector is connected to the side of the fourth main body facing away from the second plate 11121, and the fourth main body is a profile structure. The two third connectors are connected one-to-one with the two fourth connectors, and the third main body and the fourth main body together enclose the inner cavity of the second side beam structure 113. It should be noted that the third connector and the fourth connector can be directly connected or indirectly connected, and the connection method between the third connector and the fourth connector can be but is not limited to welding, bonding, etc.

[0128] Of course, in other embodiments, the third body may be a flat plate structure and the fourth body may be a profile structure, or the third body may be a profile structure and the fourth body may be a flat plate structure.

[0129] The first direction intersecting with the second direction and being perpendicular to the stacking direction of the first plate 1111 and the second plate 1112 means that the first direction and the second direction are perpendicular to the stacking direction of the first plate 1111 and the second plate 1112, that is, the first direction and the second direction are perpendicular to the height direction of the box 10. In some embodiments, the first direction may be the width direction of the box 10, and the second direction may be the length direction of the box 10. In other embodiments, the first direction may be the length direction of the box 10, and the second direction may be the width direction of the box 10.

[0130] By adopting the above technical solution, the plate assembly 111 and the second side beam structure 113 do not need to be connected by fasteners, which effectively reduces the number of parts of the box body 10, thereby effectively simplifying the assembly process of the box body 10 and improving the assembly efficiency of the box body 10.

[0131] In some embodiments of the present application, please refer to Figures 3 and 4. The number of the first frame edge portions 11112, the number of the second frame edge portions 11122, the number of the third frame edge portions 11115, and the number of the fourth frame edge portions 11125 are two. The two first frame edge portions 11112 are respectively arranged on two opposite sides of the first plate body 11111 along the first direction, and the two second frame edge portions 11122 are respectively arranged on two opposite sides of the second plate body 11121 along the first direction. 122 are arranged in a one-to-one correspondence to form two first side beam structures 112, the two third frame edges 11115 are arranged on the opposite sides of the first plate body 11111 along the second direction, the two fourth frame edges 11125 are arranged on the opposite sides of the second plate body 11121 along the second direction, the two third frame edges 11115 and the two fourth frame edges 11125 are arranged in a one-to-one correspondence to form two second side beam structures 113, and the two first side beam structures 112 and the two second side beam structures 113 enclose a receiving space 114.

[0132] In other words, a first side beam structure 112 , a second side beam structure 113 , another first side beam structure 112 and another second side beam structure 113 together form the outer frame structure of the box body 10 , and the outer frame structure defines the above-mentioned accommodation space 114 .

[0133] By adopting the above technical solution, it is easy to form the outer frame of the box body 10, so that the plate assembly 111 and the outer frame do not need to be connected by fasteners, effectively reducing the number of parts of the box body 10, thereby effectively simplifying the assembly process of the box body 10 and improving the assembly efficiency of the box body 10.

[0134] In some embodiments of the present application, please refer to FIG. 9 and FIG. 11 . The third frame side portion 11115 includes a third steel layer 11116 . The third steel layer 11116 constitutes at least a portion of the second side beam structure 113 .

[0135] The third steel layer 11116 is a layer made of steel. The third steel layer 11116 may constitute only a part or all of the third main body, or only a part or all of the third connector, or a part or all of the third main body and a part or all of the third connector.

[0136] By adopting the above technical solution, the structural strength of the second side beam structure 113 is effectively improved.

[0137] In some embodiments of the present application, please refer to Figures 9 and 11 together. The third frame edge 11115 also includes two third aluminum layers 11117 connected to the first plate 11111. The two third aluminum layers 11117 cooperate to clamp the third steel layer 11116 along the stacking direction of the first plate 1111 and the second plate 1112.

[0138] The third aluminum layer 11117 is a layer made of aluminum. Two third aluminum layers 11117 cooperate to clamp the third steel layer 11116 along the stacking direction of the first plate 1111 and the second plate 1112. That is, the two third aluminum layers 11117 cooperate to clamp the third steel layer 11116 along the thickness direction of the plate assembly 111. The third aluminum layer 11117 and the first plate 11111 can be an integral connecting member or a separate connecting member.

[0139] In some embodiments, in order to facilitate the connection of the third frame edge 11115 to the first plate body 11111 and improve the connection strength between the third frame edge 11115 and the first plate body 11111, the first plate body 11111 is an aluminum plate. As an example, the number of the first frame edge 11112 and the number of the third frame edge 11115 are two, the two first frame edge 11112 are respectively arranged on the opposite sides of the first plate body 11111 along the first direction, and the two third frame edge 11115 are respectively arranged on the opposite sides of the first plate body 11111 along the second direction. The first plate 1111 can be rolled from four steel plates and two aluminum plates. Specifically, the four steel plates are placed between the two aluminum plates so that the two aluminum plates clamp the four steel plates, and the two The steel plates are arranged at two opposite sides of the aluminum plate along the first direction, and the other two steel plates are arranged at two opposite sides of the aluminum plate along the second direction. The four steel plates and two aluminum plates are rolled, and the middle parts of the two aluminum plates are extruded and combined to form a first plate body 11111. The two aluminum plates clamp the corresponding steel plates at the sides along the first direction and are extruded and combined with the steel plates to form a first frame side 11112. The two aluminum plates clamp the corresponding steel plates at the sides along the second direction and are extruded and combined with the steel plates to form a third frame side 11115.

[0140] Of course, in other embodiments, the first plate 1111 can also be first rolled from a steel plate and two aluminum plates to form a first frame side portion 11112, and rolled from another steel plate and another two aluminum plates to form a third frame side portion 11115, and then the two first aluminum layers 11114 are connected to the two opposite sides of the first plate 11111 along the first direction, and the two third aluminum layers 11117 are connected to the two opposite sides of the first plate 11111 along the second direction.

[0141] By adopting the above technical solution, the weight of the first plate 1111 is effectively reduced, thereby effectively improving the mass energy density of the battery 100.

[0142] In some embodiments of the present application, please refer to FIG. 9 and FIG. 11 . The fourth frame side portion 11125 includes a fourth steel layer 11126 . The fourth steel layer 11126 constitutes at least a portion of the second side beam structure 113 .

[0143] The fourth steel layer 11126 is a layer made of steel. The fourth steel layer 11126 can constitute only part or all of the above-mentioned fourth main body, or only part or all of the above-mentioned fourth connector, or part or all of the above-mentioned fourth main body and part or all of the above-mentioned fourth connector.

[0144] By adopting the above technical solution, the structural strength of the second side beam structure 113 is effectively improved.

[0145] In some embodiments of the present application, please refer to Figures 9 and 11 together. The fourth frame edge 11125 also includes two fourth aluminum layers 11127 connected to the second plate 11121. The two fourth aluminum layers 11127 cooperate to clamp the fourth steel layer 11126 along the stacking direction of the first plate 1111 and the second plate 1112.

[0146] Fourth aluminum layer 11127 is a layer made of aluminum. Two fourth aluminum layers 11127 cooperate to clamp fourth steel layer 11126 along the stacking direction of first plate 1111 and second plate 1112. That is, two fourth aluminum layers 11127 cooperate to clamp fourth steel layer 11126 along the thickness direction of plate assembly 111. Fourth aluminum layer 11127 and second plate 11121 can be an integral connecting member or a separate connecting member.

[0147] In some embodiments, in order to facilitate the connection of the fourth frame edge 11125 with the second plate 11121 and improve the connection strength between the fourth frame edge 11125 and the second plate 11121, the second plate 11121 is an aluminum plate. As an example, the number of the second frame edge 11122 and the number of the fourth frame edge 11125 are two, the two second frame edge 11122 are respectively arranged on the opposite sides of the second plate 11121 along the first direction, and the two fourth frame edge 11125 are respectively arranged on the opposite sides of the second plate 11121 along the second direction. The second plate 1112 can be rolled from four steel plates and two aluminum plates. Specifically, the four steel plates are placed between the two aluminum plates so that the two aluminum plates clamp the four steel plates, and the two The steel plates are arranged on two opposite sides of the aluminum plate along the first direction, and the other two steel plates are arranged on two opposite sides of the aluminum plate along the second direction. The four steel plates and two aluminum plates are rolled, and the middle parts of the two aluminum plates are extruded and combined to form a second plate body 11121. The two aluminum plates clamp the corresponding steel plates along the sides of the first direction and are extruded and combined with the steel plates to form a second frame side 11122. The two aluminum plates clamp the corresponding steel plates along the sides of the second direction and are extruded and combined with the steel plates to form a fourth frame side 11125.

[0148] Of course, in other embodiments, the second plate 1112 can also be first rolled from a steel plate and two aluminum plates to form the second frame side portion 11122, and rolled from another steel plate and another two aluminum plates to form the fourth frame side portion 11125, and then the two second aluminum layers 11124 are connected to the two opposite sides of the second plate 11121 along the first direction, and the two fourth aluminum layers 11127 are connected to the two opposite sides of the second plate 11121 along the second direction.

[0149] By adopting the above technical solution, the weight of the second plate 1112 is effectively reduced, thereby effectively improving the mass energy density of the battery 100.

[0150] In some embodiments of the present application, please refer to Figures 5 and 6 together. The box body 10 also includes a third plate 1113 stacked between the first plate 1111 and the second plate 1112. The third plate 1113 includes a third plate body 11131 and a fifth frame edge portion 11132 connected to the side of the third plate body 11131. The fifth frame edge portion 11132 extends to the inner cavity of the first side beam structure 112 and is connected between the first frame edge portion 11112 and the second frame edge portion 11122.

[0151] Third plate 1113 is the center portion of plate assembly 111. Third plate 1113 can be made of one or more metal materials, including but not limited to aluminum, aluminum alloys, iron, stainless steel, copper, and the like. The material of third plate 1113 can be the same as or different from that of first plate 1111. Similarly, the material of third plate 1113 can be the same as or different from that of second plate 1112.

[0152] The third plate 1113 is stacked between the first plate 1111 and the second plate 1112 , which means that in the thickness direction of the plate assembly 111 , the first plate 1111 , the third plate 1113 and the second plate 1112 are stacked together in sequence.

[0153] The third plate 11131 is the main body of the third plate 1113. The third plate 11131 can be a flat plate or a plate with a concave-convex structure, for example, a concave structure and / or a convex structure is provided on the surface of the third plate 11131. In the thickness direction of the plate assembly 111, the first plate 11111, the third plate 11131, and the second plate 11121 are stacked together in this order.

[0154] The fifth frame edge portion 11132 is an edge portion of the third plate 1113. The fifth frame edge portion 11132 extends into the inner cavity of the first side beam structure 112 and is connected between the first frame edge portion 11112 and the second frame edge portion 11122, so that the fifth frame edge portion 11132 can serve as a reinforcement rib of the first side beam structure 112, thereby further improving the strength of the first side beam structure 112.

[0155] In some embodiments, the fifth frame edge portion 11132 includes a fifth body and two fifth connectors, one fifth connector is connected between the third plate 11131 and the fifth body, and the other fifth connector is connected to the side of the fifth body facing away from the third plate 11131. The above-mentioned first connector is connected to a second connector through a fifth connector, and the above-mentioned other first connector is connected to another second connector through another fifth connector. The fifth body is arranged in the inner cavity of the first side beam structure 112. The fifth body can be a profile structure or a flat plate structure. The connection method between the first connector and the fifth connector can be, but is not limited to, welding, bonding, etc. Similarly, the connection method between the second connector and the fifth connector can be, but is not limited to, welding, bonding, etc.

[0156] By adopting the above technical solution, the structural strength of the first side beam structure 112 is further improved.

[0157] In some embodiments of the present application, please refer to FIG. 5 and FIG. 7 , the fifth frame side portion 11132 includes a fifth steel layer 11133 , and the fifth steel layer 11133 extends to the inner cavity of the first side beam structure 112 .

[0158] The fifth steel layer 11133 is a layer made of steel. The fifth steel layer 11133 may constitute only a part or all of the fifth main body, or only a part or all of the fifth connector, or a part or all of the fifth main body and a part or all of the fifth connector.

[0159] By adopting the above technical solution, the structural strength of the first side beam structure 112 is further improved.

[0160] In some embodiments of the present application, please refer to Figures 5 and 7 together. The fifth frame edge 11132 also includes two fifth aluminum layers 11134 connected to the third plate 11131. The two fifth aluminum layers 11134 cooperate to clamp the fifth steel layer 11133 along the stacking direction of the first plate 1111 and the second plate 1112.

[0161] The fifth aluminum layer 11134 is a layer made of aluminum. Two fifth aluminum layers 11134 cooperate to clamp the fifth steel layer 11133 along the stacking direction of the first plate 1111 and the second plate 1112. That is, the two fifth aluminum layers 11134 cooperate to clamp the fifth steel layer 11133 along the thickness direction of the plate assembly 111. The fifth aluminum layer 11134 and the third plate 11131 can be an integral connecting member or a separate connecting member.

[0162] Compared with steel, aluminum has a smaller mass under the same volume. By adopting the above technical solution, the weight of the third plate 1113 is effectively reduced, thereby effectively improving the mass energy density of the battery 100.

[0163] In some embodiments of the present application, the third plate 11131 is an aluminum plate.

[0164] In other words, the third plate 11131 is made of aluminum.

[0165] In some embodiments, the third plate 1113 can be rolled from a steel plate and two aluminum plates. Specifically, the steel plate is placed between the two aluminum plates so that the two aluminum plates clamp the steel plate, and the steel plate is located at the edge of the aluminum plate. The steel plate and the two aluminum plates are rolled, and the middle parts of the two aluminum plates are extruded and combined to form the third plate body 11131. The edges of the two aluminum plates clamp the steel plate and are extruded and combined with the steel plates to form the fifth frame edge 11132.

[0166] Of course, in other embodiments, the third plate 1113 may also be first rolled from a steel plate and two aluminum plates to form the fifth frame edge portion 11132 , and then the two fifth aluminum layers 11134 are connected to the third plate 11131 .

[0167] By adopting the above technical solution, it is not only convenient to connect the fifth frame edge 11132 with the third plate body 11131, effectively improving the connection strength between the fifth frame edge 11132 and the third plate body 11131, but also further reducing the weight of the third plate 1113, thereby further improving the mass energy density of the battery 100.

[0168] In some embodiments of the present application, please refer to Figures 3 to 5 and 8 together. The second plate body 11121 is arranged on the side of the third plate body 1113 facing away from the accommodating space 114. The second plate body 11121 is provided with an air guide channel 11128 on the side facing the third plate body 1113. The air guide channel 11128 is connected to the external environment of the box body 10. A through hole 11129 is provided at the connection between the first plate body 11111 and the third plate body 11131. The air guide channel 11128 is connected to the accommodating space 114 through the through hole 11129.

[0169] The air guide channel 11128 is used to connect the accommodating space 114 of the housing 10 with the external environment of the housing 10. There can be multiple air guide channels 11128, and multiple air guide channels 11128 are arranged side by side. The multiple air guide channels 11128 can be interconnected or disconnected. The air guide channels 11128 can extend in any direction. In some embodiments, the air guide channels 11128 extend along the length of the housing 10, and in other embodiments, the air guide channels 11128 extend along the width of the housing 10.

[0170] Through hole 11129 is used to connect the air guide channel 11128 with the storage space 114 of the housing 10. It is understood that through hole 11129 is arranged opposite to air guide channel 11128 and extends through the thickness of the first plate 1111 at the connection between the first plate 11111 and the third plate 11131 to connect the air guide channel 11128 with the storage space 114 of the housing 10. There may be multiple through holes 11129. The shape of through holes 11129 may be, but is not limited to, circular, square, or the like.

[0171] In some embodiments, the pressure relief mechanism of the battery cell 20 is arranged opposite to the through hole 11129. In the event of thermal runaway of the battery cell 20, a large amount of high-temperature gas will be generated inside the battery cell 20. When the pressure of the battery cell 20 exceeds the safety threshold, the pressure relief mechanism opens, and the high-temperature gas is discharged to the external environment of the box body 10 in sequence through the pressure relief mechanism, the through hole 11129 and the gas guide channel 11128, so as to reduce the risk of explosion of the battery 100.

[0172] By adopting the above technical solution, the second plate 1112 can be used as a gas guide plate to facilitate the discharge of gas from the accommodating space 114 of the box body 10 when thermal runaway occurs in the battery 100.

[0173] In some embodiments of the present application, please refer to FIG. 5 and FIG. 8 , the first plate 11111 and the third plate 11131 are connected to form a heat exchange channel 11135 , and the heat exchange channel 11135 is used to accommodate a heat exchange medium to adjust the temperature of the battery cell 20 .

[0174] The heat exchange channels 11135 are used to provide a flow space for the heat exchange medium. There can be multiple heat exchange channels 11135, and multiple heat exchange channels 11135 can be arranged side by side. The multiple heat exchange channels 11135 can be interconnected, for example, multiple heat exchange channels 11135 can be connected end to end. The heat exchange channels 11135 can extend in any direction. In some embodiments, the heat exchange channels 11135 extend along the length of the housing 10, while in other embodiments, the heat exchange channels 11135 extend along the width of the housing 10.

[0175] By adopting the above technical solution, the first plate 11111 and the third plate 11131 can be connected to form a heat exchange plate, which is convenient for heat exchange of the battery cell 20 accommodated in the accommodating space 114 to achieve temperature control of the battery cell 20.

[0176] In some embodiments of the present application, please refer to Figures 3 to 5 and 8 together. The first plate body 11111 is arranged on the side of the third plate body 1113 facing the accommodating space 114, and the second plate body 11121 is arranged on the side of the third plate body 1113 facing away from the accommodating space 114. An air guide channel 11128 is provided on the side of the second plate body 11121 facing the third plate body 1113. The air guide channel 11128 is connected to the external environment of the box body 10. A through hole 11129 is provided at the connection between the first plate body 11111 and the third plate body 11131. The air guide channel 11128 is connected to the accommodating space 114 through the through hole 11129. A heat exchange channel 11135 is provided on the side of the third plate body 11131 facing the first plate body 1111.

[0177] By adopting the above technical solution, not only can the second plate 1112 be used as an air guide plate to facilitate the discharge of gas from the storage space 114 of the box body 10 when thermal runaway occurs in the battery 100, but the first plate body 11111 and the third plate body 11131 can also be connected to form a heat exchange plate, which is convenient for heat exchange of the battery cell 20 accommodated in the storage space 114 to achieve temperature regulation of the battery cell 20.

[0178] In some embodiments of the present application, the first frame edge portion 11112 and the fifth frame edge portion 11132 are welded.

[0179] In some other embodiments of the present application, the second frame edge portion 11122 and the fifth frame edge portion 11132 are welded.

[0180] In some other embodiments of the present application, the first frame side portion 11112 is welded to the fifth frame side portion 11132 , and the second frame side portion 11122 is welded to the fifth frame side portion 11132 .

[0181] The welding method between the first frame side portion 11112 and the fifth frame side portion 11132 and the welding method between the second frame side portion 11122 and the fifth frame side portion 11132 may be, but is not limited to, brazing, laser welding, and the like.

[0182] By adopting the above technical solution, the first frame side portion 11112 and / or the second frame side portion 11122 is easily connected to the fifth frame side portion 11132.

[0183] In the second aspect, referring to FIG. 2 , an embodiment of the present application provides a battery 100 , comprising the box 10 described in any one of the above embodiments.

[0184] The battery 100 provided in the embodiment of the present application adopts the battery cell 20 described in any of the above embodiments, which effectively reduces the number of components of the battery 100, thereby effectively simplifying the assembly process of the battery 100 and improving the assembly efficiency of the battery 100.

[0185] In the third aspect, please refer to FIG1 , an embodiment of the present application provides an electrical device including the above-mentioned battery 100 .

[0186] Since the electric device provided in the embodiment of the present application adopts the above-mentioned battery 100, the number of parts of the electric device is effectively reduced, thereby effectively simplifying the assembly process of the electric device and improving the assembly efficiency of the electric device.

[0187] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A box, characterized in that: The box body includes a plate assembly, and the plate assembly includes a first plate member and a second plate member stacked together, the first plate member includes a first plate body and a first frame edge portion connected to the side of the first plate body, the second plate member includes a second plate body and a second frame edge portion connected to the side of the second plate body, the first frame edge portion and the second frame edge portion are connected to form a first side beam structure, and the first side beam structure defines a storage space for accommodating battery cells.

2. The box according to claim 1, characterized in that The first frame side portion includes a first steel layer, and the first steel layer constitutes at least a portion of the first side beam structure.

3. The box according to claim 2, characterized in that: The first frame edge portion further includes two first aluminum layers connected to the first plate body, and the two first aluminum layers cooperate to clamp the first steel layer along the stacking direction of the first plate member and the second plate member.

4. The box according to any one of claims 1 to 3, characterized in that: The first plate is an aluminum plate.

5. The box according to any one of claims 1 to 4, characterized in that: The second frame side portion includes a second steel layer, and the second steel layer constitutes at least a part of the first side beam structure.

6. The box according to claim 5, characterized in that: The second frame edge portion further includes two second aluminum layers connected to the second plate body, and the two second aluminum layers cooperate to clamp the second steel layer along the stacking direction of the first plate member and the second plate member.

7. The box according to any one of claims 1 to 6, characterized in that: The second plate is an aluminum plate.

8. The box according to any one of claims 1 to 7, characterized in that: The first plate also includes a third frame edge portion, the first frame edge portion is connected to one side of the first plate body along the first direction, and the third frame edge portion is connected to one side of the first plate body along the second direction. The second plate also includes a fourth frame edge portion, the second frame edge portion is connected to one side of the second plate body along the first direction, and the fourth frame edge portion is connected to one side of the second plate body along the second direction. The third frame edge portion and the fourth frame edge portion are connected to form a second side beam structure, and the second side beam structure and the first side beam structure jointly define the accommodating space, wherein the first direction intersects with the second direction and is perpendicular to the stacking direction of the first plate and the second plate.

9. The box according to claim 8, characterized in that: The number of the first frame edge portions, the number of the second frame edge portions, the number of the third frame edge portions and the number of the fourth frame edge portions are two, the two first frame edge portions are arranged on opposite sides of the first plate body along the first direction, the two second frame edge portions are arranged on opposite sides of the second plate body along the first direction, the two first frame edge portions and the two second frame edge portions are arranged in a one-to-one correspondence to form two first side beam structures, the two third frame edge portions are arranged on opposite sides of the first plate body along the second direction, the two fourth frame edge portions are arranged in a one-to-one correspondence to form two second side beam structures, and the two first side beam structures and the two second side beam structures enclose the accommodating space.

10. The box according to claim 8 or 9, characterized in that: The third frame side portion includes a third steel layer, and the third steel layer constitutes at least a part of the second side beam structure.

11. The box according to claim 10, characterized in that: The third frame edge portion further includes two third aluminum layers connected to the first plate body, and the two third aluminum layers cooperate to clamp the third steel layer along the stacking direction of the first plate member and the second plate member.

12. The box according to any one of claims 8 to 11, characterized in that: The fourth frame side portion includes a fourth steel layer, and the fourth steel layer constitutes at least a portion of the second side beam structure.

13. The box according to claim 12, characterized in that: The fourth frame edge portion further includes two fourth aluminum layers connected to the second plate body, and the two fourth aluminum layers cooperate to clamp the fourth steel layer along the stacking direction of the first plate member and the second plate member.

14. The box according to any one of claims 1 to 13, characterized in that: The box body also includes a third plate stacked between the first plate and the second plate, the third plate including a third plate body and a fifth frame edge connected to the side of the third plate body, the fifth frame edge extending to the inner cavity of the first side beam structure and connected between the first frame edge and the second frame edge.

15. The box according to claim 14, characterized in that: The fifth frame side portion includes a fifth steel layer, and the fifth steel layer extends to the inner cavity of the first side beam structure.

16. The box according to claim 15, characterized in that The fifth frame edge portion further includes two fifth aluminum layers connected to the third plate body, and the two fifth aluminum layers cooperate to clamp the fifth steel layer along the stacking direction of the first plate member and the second plate member.

17. The box according to any one of claims 14 to 16, characterized in that: The third plate is an aluminum plate.

18. The box according to any one of claims 14 to 17, characterized in that: The second plate is arranged on the side of the third plate facing away from the accommodating space, and an air guide channel is provided on the side of the second plate facing the third plate, and the air guide channel is connected to the external environment of the box. A through hole is provided at the connection between the first plate and the third plate, and the air guide channel is connected to the accommodating space through the through hole.

19. The box according to any one of claims 14 to 18, characterized in that: The first plate and the third plate are connected to form a heat exchange channel, and the heat exchange channel is used to accommodate a heat exchange medium to adjust the temperature of the battery cell.

20. The box according to any one of claims 14 to 19, characterized in that: The first frame edge portion and the fifth frame edge portion are welded; and / or, The second frame side portion and the fifth frame side portion are welded.

21. A battery, characterized in that: The battery includes a battery cell and the box body according to any one of claims 1 to 20, and the battery cell is accommodated in the accommodation space.

22. An electrical device, characterized in that: The electric device comprises the battery as claimed in claim 21.

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