Box structure, battery and electric device

Abstract

The utility model provides a box body structure, a battery and an electric device. The box body structure comprises a lower box body; the cover plate covers the lower box body, and an accommodating space is formed by the cover plate and the lower box body; the cross beam is used for being connected with the seat and integrally formed on the face, away from the containing space, of the cover plate. The cross beam is integrally formed on the face, deviating from the containing space, of the cover plate, so that the cross beam and the cover plate are firmly connected, the number of assembly parts can be reduced, production efficiency is improved, and material management and control cost is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and more specifically, relates to a box structure, a battery, and an electric device. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

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

[0004] The purpose of the embodiments of this application is to provide a box structure, a battery, and an electric device to improve the integration reliability of the seat crossbeam and the battery box.

[0005] In a first aspect, the embodiments of this application provide a box structure, including:

[0006] A lower box body;

[0007] A cover plate, covering the lower box body and jointly forming a receiving space with the lower box body;

[0008] A crossbeam for connecting the seat, the crossbeam being integrally formed on a surface of the cover plate facing away from the receiving space.

[0009] In the technical solution of the embodiments of this application, by integrally forming the crossbeam on the surface of the cover plate facing away from the receiving space, the connection between the crossbeam and the cover plate can be made firm, and the number of assembled parts can be reduced, the production efficiency can be improved, and the material control cost can be reduced.

[0010] In some embodiments, the crossbeam includes a support plate for supporting the seat, and the support plate is integrally formed on a surface of the cover plate facing away from the receiving space.

[0011] The crossbeam uses the support plate to support the seat, which is convenient for being integrally formed on the cover plate and convenient for processing and manufacturing.

[0012] In some embodiments, the support plate includes a first support plate, and a plurality of first support plates are arranged at intervals, and each first support plate extends along a first direction.

[0013] Using the first support plates arranged at intervals and extending the first support plates along the first direction is convenient for being integrally formed on the cover plate and convenient for processing and manufacturing.

[0014] In some embodiments, the support plate includes a plurality of second support plates which are spaced apart and arranged at intervals along a first direction.

[0015] Using a plurality of second support plates arranged at intervals, the structure is simple and it is convenient to integrally form on the cover plate, which is convenient for processing and manufacturing.

[0016] In some embodiments, the cross beam further includes a reinforcing rib connected to the support plate.

[0017] The reinforcing rib is provided to enhance the structural strength of the cross beam.

[0018] In some embodiments, a plurality of reinforcing ribs are arranged in a cross pattern.

[0019] A plurality of reinforcing ribs are arranged in a cross pattern to enhance the structural strength of the cross beam and also facilitate the processing and manufacturing of the cross beam.

[0020] In some embodiments, a connecting column is provided in the cross beam.

[0021] The connecting column is provided in the cross beam to connect to an external structure.

[0022] In some embodiments, the connecting column and the cross beam are of an integrally formed structure.

[0023] The connecting column and the cross beam are integrally formed, which is not only convenient for processing and manufacturing, but also can make the connection between the connecting column and the cross beam firm.

[0024] In some embodiments, a flow channel is provided in the cover plate.

[0025] The flow channel is provided in the cover plate to connect to a coolant supply system so that the coolant flows through the flow channel, thereby controlling the temperature of the cover plate and further controlling the temperature of the battery using the cover plate.

[0026] In some embodiments, the cover plate includes a top plate and a sealing plate connected to the top plate. A flow channel groove is provided on the top plate, and the sealing plate covers the flow channel groove to form a flow channel. The cross beam is integrally formed on the top plate.

[0027] Using the top plate with a flow channel groove and the sealing plate to connect to form the cover plate and forming a flow channel in the cover plate is convenient for processing and manufacturing.

[0028] In some embodiments, the cross beam and the top plate are integrally cast.

[0029] Integrally casting the cross beam and the top plate is convenient for processing and manufacturing and also convenient for integrally forming the cross beam and the top plate.

[0030] In some embodiments, the top plate includes a first aluminum layer, the sealing plate includes a second aluminum layer, the first aluminum layer is connected to the second aluminum layer, and a flow channel is formed between the first aluminum layer and the second aluminum layer.

[0031] Forming a flow channel between the first aluminum layer and the second aluminum layer can not only endow the cover plate with good heat conduction effect, but also enable the inner wall of the formed flow channel to have good corrosion resistance.

[0032] In some embodiments, the top plate includes a first steel layer, the first aluminum layer is disposed on the side of the first steel layer close to the sealing plate, and the cross beam is a steel beam.

[0033] The top plate is provided with the first steel layer to enhance the structural strength of the top plate, and further enhance the structural strength of the cover plate; while the cross beam uses a steel beam, so that the cross beam has a high structural strength and is also convenient for the cross beam to be integrally formed on the top plate.

[0034] In some embodiments, the sealing plate includes a second steel layer, and the second aluminum layer is disposed on the side of the second steel layer close to the top plate.

[0035] The sealing plate is provided with the second steel layer to enhance the structural strength of the sealing plate, and further enhance the structural strength of the box body structure. And a second aluminum layer is provided on the second steel layer to connect with the first aluminum layer of the top plate.

[0036] In some embodiments, a reinforcing beam is provided at a position corresponding to the cross beam in the accommodating space.

[0037] Providing a reinforcing beam at the corresponding position of the cross beam can not only increase the structural strength of the box body structure, but also more stably support the cross beam.

[0038] In a second aspect, an embodiment of the present application provides a battery, including the box body structure as described in the above embodiment.

[0039] In a third aspect, an embodiment of the present application provides an electrical device, including the box body structure as described in the above embodiment, or including the battery as described in the above embodiment.

[0040] In some embodiments, the electrical device is a vehicle, and the cross beam is a seat beam of the vehicle.

[0041] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the embodiments or exemplary technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0043] Figure 1 Structural schematic diagram of a vehicle according to some embodiments of the present application;

[0044] Figure 2 Exploded structural schematic diagram of a battery according to some embodiments of the present application;

[0045] Figure 3 Exploded structural schematic diagram of a battery cell according to some embodiments of the present application;

[0046] Figure 4 Structural schematic diagram of a box structure according to some embodiments of the present application;

[0047] Figure 5 is Figure 4 Exploded structural schematic diagram of the box structure;

[0048] Figure 6 is Figure 4 Top view structural schematic diagram of the box structure;

[0049] Figure 7 is Figure 6 Enlarged view of part A in;

[0050] Figure 8 Cross-sectional structural schematic diagram of a crossbeam and a cover plate provided by some embodiments of the present application;

[0051] Figure 9 Structural schematic of a crossbeam and a cover plate provided by some embodiments of the present application Figure 1 ;

[0052] Figure 10 Structural schematic of a crossbeam and a cover plate provided by some embodiments of the present application Figure 2 ;

[0053] Figure 11 Structural schematic of a crossbeam and a cover plate provided by some embodiments of the present application Figure 3 ;

[0054] Figure 12 Structural schematic of a crossbeam and a cover plate provided by some embodiments of the present application Figure 4 ;

[0055] Figure 13 Cross-sectional structural schematic of a cover plate provided by some embodiments of the present application Figure 1 ;

[0056] Figure 14 Cross-sectional structural schematic of a cover plate provided by some embodiments of the present application Figure 2 ;

[0057] Figure 15 Cross-sectional structural schematic of a cover plate provided by some embodiments of the present application Figure 3 ;

[0058] Figure 16 Schematic diagram of the exploded structure of the box structure according to other embodiments of the present application.

[0059] Among them, the main reference signs in the drawings are as follows:

[0060] 1000 - Vehicle; 1001 - Battery; 1002 - Controller; 1003 - Motor;

[0061] 100 - Box structure; 101 - Upper box; 102 - Lower box; 10 - Accommodating space;

[0062] 11 - Cover plate; 110 - Flow channel; 111 - Top plate; 1111 - First aluminum layer; 1112 - First steel layer; 112 - Sealing plate; 1121 - Second aluminum layer; 1122 - Second steel layer;

[0063] 12 - Cross beam; 121 - Support plate; 1211 - First support plate; 1212 - Second support plate; 122 - Reinforcing rib; 13 - Connecting column; 131 - Connecting hole; 14 - Reinforcing beam;

[0064] 200 - Battery cell; 21 - Electrode assembly; 211 - Tab; 22 - Outer shell; 221 - Housing; 222 - End cap; 23 - Electrode terminal; 24 - Adapter plate; 25 - Pressure relief mechanism. Detailed implementation manners

[0065] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field 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 drawings are intended to cover non - exclusive inclusion.

[0067] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary - secondary relationship of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0068] References to "embodiments" in this specification mean that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appearing in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments in any suitable manner.

[0069] In the description of the embodiments of the present application, the term "and / or" is merely a relationship describing the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally represents an "or" relationship between the associated objects before and after.

[0070] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces). The meaning of "several" is one or more, unless otherwise specifically defined.

[0071] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present application.

[0072] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "coupling", "fixing", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0073] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0074] The battery cells in the embodiments of the present application 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, magnesium-ion battery cells, etc. The shape of the battery cell includes, but is not limited to, a cylindrical shape, a flat shape, a cuboid shape, or other shapes, etc. Generally, according to the packaging method, the battery cells include, but are not limited to: cylindrical battery cells, square battery cells, and soft-pack battery cells.

[0075] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack, etc. Generally, the battery includes a box for encapsulating one or more battery cells. The box can, to a certain extent, prevent liquids or other foreign objects 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 box, which is not limited herein.

[0076] In a battery, when there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in a series-parallel combination. A series-parallel combination means that there are both series and parallel connections among the multiple battery cells. The multiple battery cells can be directly connected in series, in parallel, or in a series-parallel combination together, and then the whole formed by the multiple battery cells is accommodated in the box; of course, the battery can also be that multiple battery cells are first connected in series, in parallel, or in a series-parallel combination to form a battery module form, and then multiple battery modules are connected in series, in parallel, or in a series-parallel combination to form a whole and are accommodated in the box. The battery can also include other structures. For example, the battery can also include a busbar component for realizing the electrical connection among the multiple battery cells.

[0077] The battery cell in the embodiments 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 through the housing.

[0078] The electrode assembly, also known as the battery cell, is a component that stores and releases electrical energy. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet, and a separator. The electrode assembly mainly operates by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode current collector. The portion of the positive electrode current collector where the positive electrode active material layer is not coated protrudes from the portion where the positive electrode active material layer is coated. The portion where the positive electrode active material layer is not coated serves as the positive electrode tab, or a metal conductor is welded and led out on the positive electrode current collector to serve as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. 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 where the negative electrode active material layer is not coated protrudes from the portion where the negative electrode active material layer is coated. The portion where the negative electrode active material layer is not coated serves as the negative electrode tab, or a metal conductor is welded and led out on the negative electrode current collector to serve as the negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure to a certain extent that a large current can pass through without fusing, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. It can be understood that in the electrode assembly, the number of positive electrode tabs can be one, and the number of negative electrode tabs can also be one. That is to say, two sets of tabs are provided on the electrode assembly, each set includes at least one tab, and one set of tabs is the positive electrode tab, and the other set of tabs is the negative electrode tab.

[0079] The electrode assembly can be a wound structure or a stacked structure. The embodiments of the present application are not limited thereto. In the wound structure, the tabs are mostly welded to the current collector, and then arranged in the order of positive electrode sheet - separator - negative electrode sheet - separator; and then wound to form a cylindrical or square battery cell. In the stacked structure, the tabs are mostly led out on the current collector, and the positive electrode sheet, the negative electrode sheet, and the separator are arranged in the order of positive electrode sheet - separator - negative electrode sheet - separator and stacked layer by layer to form a stacked battery cell; among them, the separator can be cut and directly stacked with separator sheets, or the separator is not cut, but stacked in a Z-shaped fold. The material of the separator can be PP (Polypropylene) or PE (Polyethylene), etc. The separator is an insulating film disposed between the positive electrode sheet and the negative electrode sheet. Its main function is: to isolate the positive and negative electrodes and prevent electrons in the battery from freely passing through, to prevent short circuit to a certain extent, and to allow ions in the electrolyte to freely pass between the positive and negative electrodes to form a circuit between the positive and negative electrodes. The positive electrode sheet and the negative electrode sheet are collectively referred to as the electrode sheets. The positive electrode tab and the negative electrode tab are collectively referred to as the tabs.

[0080] Electrode terminals are provided on the outer casing of a battery cell. An electrode terminal refers to a conductive member provided on the outer casing, and the electrode terminal is connected to the tab of the electrode assembly to output the electrical energy of the battery cell or charge the battery cell. Generally, there are two electrode terminals for a battery cell, and the two electrode terminals are respectively connected to the positive and negative tabs of the electrode assembly. 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. The electrode assembly is connected to the electrode terminal to form a battery cell.

[0081] For electrical devices such as electric vehicles, relatively large batteries are often provided. In order to improve the integration of the vehicle, a seat crossbeam is often directly integrated on the upper cover of the battery. Currently, the seat crossbeam is generally made of steel. To achieve the connection between the two, the upper cover of the battery is also made of steel for spot welding connection with the seat crossbeam. However, this connection method results in a poor welding effect and weak strength between the seat crossbeam and the battery upper cover, and the welded joint between the seat crossbeam and the upper cover is prone to cracking, with poor stability and poor connection reliability. In addition, using steel for the battery upper cover increases the weight of the battery pack, which is not conducive to the lightweight of the whole vehicle. If aluminum is used for the battery upper cover, the battery upper cover and the seat crossbeam are connected by bolts, with a complex connection structure, a large number of bolts, complex assembly operations, many sealing failure points, and poor connection reliability.

[0082] Based on the above considerations and to solve the above problems, the embodiment of the present application provides a box structure. By integrally forming the crossbeam on the side of the cover plate facing away from the accommodation space of the box structure, the connection strength between the crossbeam and the cover plate is improved, thereby enhancing the overall structural strength of the box structure, and it can also reduce the number of assembly parts, improve production efficiency, and reduce material control costs.

[0083] The box structure disclosed in the embodiment of the present application can be used as the box of a battery. Of course, the box structure disclosed in the embodiment of the present application can also be used as the seat support or floor structure of electrical devices such as vehicles and ships.

[0084] The battery disclosed in the embodiment 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 systems applied to hydroelectric, thermal, wind, and solar power stations. The electrical device can be, but is not limited to, electric toys, electric vehicles, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0085] For the convenience of description, an embodiment of the present application provides an electrical device, and this electrical device is described by taking a vehicle as an example.

[0086] Please refer to Figure 1 ,Figure 1 Schematic structural diagram of vehicle 1000 provided by some embodiments of the present application. 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, an extended-range vehicle, etc. A battery 1001 is disposed inside vehicle 1000, and the battery 1001 can be disposed at the bottom of vehicle 1000. The battery 1001 can be used for power supply of vehicle 1000. For example, the battery 1001 can be used as the operating power source of vehicle 1000. Vehicle 1000 can also include a controller and a motor. The controller is used to control the battery 1001 to supply power to the motor. For example, it is used for the working power requirements during the start, navigation, and driving of vehicle 1000.

[0087] In some embodiments of the present application, the battery 1001 can not only be used as the operating power source of vehicle 1000, but also as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0088] Please refer to Figure 2 , Figure 2 Exploded structural diagram of battery 1001 provided by some embodiments of the present application. The battery 1001 includes a box structure 100 and battery cells 200, and the battery cells 200 are accommodated in the box structure 100. Among them, the box structure 100 is used to provide a accommodation space 10 for the battery cells 200, and the box structure 100 can adopt various structures. In some embodiments, the box structure 100 can include an upper box body 101 and a lower box body 102. The upper box body 101 and the lower box body 102 cover each other, and the upper box body 101 and the lower box body 102 jointly define an accommodation space 10 for accommodating the battery cells 200. The lower box body 102 can be a hollow structure with one end open, and the upper box body 101 can be a plate-like structure. The upper box body 101 covers the open side of the lower box body 102 so that the upper box body 101 and the lower box body 102 jointly define the accommodation space 10; the upper box body 101 and the lower box body 102 can also both be hollow structures with one side open, and the open side of the upper box body 101 covers the open side of the lower box body 102. Of course, the box structure 100 formed by the upper box body 101 and the lower box body 102 can be of various shapes, such as a cylinder, a cuboid, etc. After a plurality of battery cells 200 are combined in parallel, in series, or in a mixed connection, they are placed in the box structure 100 formed after the upper box body 101 and the lower box body 102 are buckled.

[0089] Please refer to Figure 3 , the battery cell 200 has a height direction, a width direction, and a thickness direction. In the figure, the Z direction is the height direction of the battery cell 200, the X direction is the width direction of the battery cell 200, and the Y direction is the thickness direction of the battery cell 200.

[0090] In some embodiments, the battery cell 200 includes an electrode assembly 21 and a housing 22. A tab 211 is provided on the electrode assembly 21, and the electrode assembly 21 is installed in the housing 22. An electrode terminal 23 is installed on the housing 22, and the electrode terminal 23 is connected to the tab 211. The electrode assembly 21 refers to the component in the battery cell 200 that stores and releases electrical energy. The tab 211 refers to the conductive member protruding from the electrode assembly 21 for releasing the electrical energy in the electrode assembly 21 or charging the electrode assembly 21. The housing 22 refers to the housing structure with a space inside to accommodate and protect the electrode assembly 21. The housing 22 can be made of a material with a certain hardness and strength. In this way, the housing 22 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 200 to have higher structural strength and improved reliability. The material of the housing 22 can be various, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The electrode terminal 23 refers to the conductive member provided on the housing 22. The electrode terminal 23 is connected to the tab 211 of the electrode assembly 21 to output the electrical energy of the battery cell 200 or charge the battery cell 200. Generally, there are two electrode terminals 23 for the battery cell 200. The two electrode terminals 23 are respectively connected to the positive and negative tabs of the electrode assembly 21. The electrode terminal 23 connected to the positive tab is the positive electrode terminal, and the electrode terminal 23 connected to the negative tab is the negative electrode terminal. The electrode assembly 21 is connected to the electrode terminals 23 to form the battery cell 200.

[0091] In some embodiments, the battery cell 200 further includes a connecting piece 24. The connecting piece 24 connects the tab 211 and the electrode terminal 23. The connecting piece 24 refers to the conductive member provided in the battery cell 200. The connecting piece 24 connects the tab 211 and the electrode terminal 23 to facilitate the electrical connection between the tab 211 and the electrode terminal 23. Generally, there are two connecting pieces 24. The two connecting pieces 24 respectively correspond to the two electrode terminals 23. Each connecting piece 24 is connected to the corresponding electrode terminal 23 and each connecting piece 24 is connected to the corresponding tab 211. That is to say, each tab 211 is connected to the corresponding electrode terminal 23 through the connecting piece 24 to facilitate the connection between the tab 211 and the electrode terminal 23, and the connection is more stable.

[0092] In some embodiments, the housing 22 includes a housing body 221 and an end cover 222. The electrode assembly 21 is installed in the housing body 221, and the end cover 222 covers the housing body 221.

[0093] The end cap 222 refers to a component that covers the opening of the housing 221 to isolate the internal environment of the battery cell 200 from the external environment. The shape of the end cap 222 can be adapted to the shape of the housing 221 to fit and cover the housing 221. Optionally, the end cap 222 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 222 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 200 to have higher structural strength and improved reliability. The material of the end cap 222 can also be diverse, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of this application do not make special restrictions on this.

[0094] The housing 221 is a component used to cooperate with the end cap 222 to form the internal environment of the battery cell 200, where the formed internal environment can be used to accommodate the electrode assembly 21, the electrolyte, and other components. The housing 221 and the end cap 222 can be independent components. An opening can be provided on the housing 221, and the end cap 222 is covered at the opening to form the internal environment of the battery cell 200. The housing 221 can have various shapes and sizes, such as rectangular parallelepiped shape, cylindrical shape, hexagonal prism shape, etc. Specifically, the shape of the housing 221 can be determined according to the specific shape and size of the battery cell 200. The material of the housing 221 can be diverse, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of this application do not make special restrictions on this.

[0095] Using the housing 221 and the end cap 222 to form the outer shell 22 has a simple structure, is convenient for processing and manufacturing, and is also convenient for the installation of the electrode assembly 21.

[0096] In some embodiments, the electrode terminal 23 can be installed on the end cap 222 to connect to the tab 211. Of course, the electrode terminal 23 can also be installed on the housing 221.

[0097] In some embodiments, pressure relief mechanisms 25 such as explosion-proof valves and explosion-proof sheets are provided on the outer shell 22 of the battery cell 200. When the temperature or pressure of the battery cell 200 exceeds the safety threshold, the gas or liquid inside the battery cell 200 can be released to relieve the pressure inside the battery cell 200 and reduce the risk of explosion of the battery cell 200. This can improve the safety performance of the battery cell 200 and reduce potential safety risks. By setting the pressure relief mechanism 25 and the fuse valve 24, the safety of the battery cell 200 can be further enhanced.

[0098] Please refer to Figure 2 、 Figure 4 and Figure 5, According to some embodiments of the present application, the present application provides a box structure 100, including: a lower box 102; a cover plate 11, covering the lower box 102 and jointly forming a receiving space 10 with the lower box 102; a cross beam 12, used to connect the seat, and the cross beam 12 is integrally formed on the side of the cover plate 11 facing away from the receiving space 10.

[0099] The lower box 102 is a hollow structure with an open upper end, and the lower box 102 has an internal space for accommodating devices such as battery cells 200.

[0100] The cover plate 11 refers to a plate-like structural member, which is used to cover an opening or a window or other orifice structures. The cover plate 11 covers the lower box 102 to jointly form the receiving space 10 with the lower box 102, that is, the cover plate 11 covers the lower box 102, so that the cover plate 11 is on the internal space of the lower box 102 to enclose the receiving space 10 for storing devices such as battery cells 200, and supports and protects the devices in the receiving space 10.

[0101] The cross beam 12 refers to a beam structure provided on the cover plate 11. The beam structure refers to a structural member that plays a role in increasing strength, connecting and supporting objects, and generally has a length greater than the height and width. Setting the cross beam 12 on the cover plate 11 can not only increase the overall structural strength of the cover plate 11, but also connect and support structural members such as seats and controllers through the cross beam 12. Please refer to Figure 1 , when the box structure 100 is applied to a vehicle 1000, the cross beam 12 can be a seat beam of the vehicle 1000. The seat beam refers to a beam used to install seats in the vehicle 1000.

[0102] The cross beam 12 is integrally formed on the side of the cover plate 11 facing away from the receiving space 10, which means that the cross beam 12 and the side of the cover plate 11 facing away from the receiving space 10 are integrally formed. For example, when the cover plate 11 is a single-layer structure, the cross beam 12 and the cover plate 11 are integrally formed; when the cover plate 11 adopts a multi-layer structure, the cross beam 12 and the topmost layer structure of the cover plate 11 are integrally formed. Generally speaking, the cross beam 12 is used to support the seat, and the cross beam 12 is installed on the cover plate 11, so the side of the cover plate 11 facing away from the receiving space 10 is the top surface of the cover plate 11.

[0103] In the technical solution of the embodiment of the present application, by integrally forming the cross beam 12 on the side of the cover plate 11 facing away from the receiving space 10, the connection between the cross beam 12 and the cover plate 11 is made firm, the connection strength between the cross beam 12 and the cover plate 11 is improved, and the number of assembly parts can be reduced, the production efficiency can be improved, and the material control cost can be reduced.

[0104] Please refer to Figures 4 to 12, in some embodiments, the cross beam 12 is used to support the support plate 121 of the seat, and the support plate 121 is integrally formed on the surface of the cover plate 11 facing away from the accommodation space 10.

[0105] The support plate 121 refers to the plate member forming the main body part of the cross beam 12. When the cross beam 12 supports an object such as a seat, the object is mainly placed on the support plate 121, and the support plate 121 is used to support the object such as the seat. The shape of the support plate 121 is diverse. For example, the support plate 121 includes but is not limited to a flat shape, a wavy shape, etc.

[0106] The cross beam 12 uses the support plate 121 to support the seat, which is convenient for integrally forming on the cover plate 11 and convenient for processing and manufacturing.

[0107] Please refer to Figures 4 to 8 , in some embodiments, the support plate 121 includes a first support plate 1211, and a plurality of first support plates 1211 are arranged at intervals, and each first support plate 1211 extends along a first direction.

[0108] The first support plate 1211 refers to the plate member forming the main body part of the cross beam 12. When the cross beam 12 supports an object such as a seat, the object is mainly placed on the first support plate 1211, and the first support plate 1211 is used to support the object such as the seat. The shape of the first support plate 1211 is diverse. For example, the first support plate 1211 includes but is not limited to a flat shape, a wavy shape, etc.

[0109] Plurality means two or more.

[0110] A plurality of first support plates 1211 are provided and these first support plates 1211 are arranged at intervals so that these first support plates 1211 can cooperate to stably support an object such as a seat.

[0111] Each first support plate 1211 extends along the first direction, which means that the length of the first support plate 1211 is consistent with the first direction. Since the first support plate 1211 forms the main body of the cross beam 12, the length direction of the first support plate 1211 forms the length direction of the cross beam 12, that is, the first direction is the length direction of the cross beam 12. The first direction can be consistent with the width direction of the cover plate 11. Of course, the first direction can be set to be consistent with the length direction of the cover plate 11. The first direction can also be set to be inclined to the width direction of the cover plate 11, and can be specifically set according to needs.

[0112] Using the first support plates 1211 arranged at intervals and extending the first support plates 1211 along the first direction is convenient for integrally forming on the top surface of the cover plate 11 and convenient for processing and manufacturing.

[0113] In some embodiments, one cross beam 12 can be provided with two first support plates 1211, or can be provided with three, four or other numbers of first support plates 1211.

[0114] Please refer to Figure 9 , in some embodiments, the support plate 121 includes a second support plate 1212, and a plurality of second support plates 1212 are arranged at intervals, and the plurality of second support plates 1212 are arranged at intervals along the first direction.

[0115] The second support plate 1212 refers to a plate member that forms the main body part of the cross beam 12. When the cross beam 12 supports an object such as a seat, the object is mainly placed on the second support plate 1212, and the second support plate 1212 is used to support the object such as the seat. The shape of the second support plate 1212 is diverse. For example, the second support plate 1212 includes but is not limited to being flat, wavy, etc.

[0116] The plurality refers to two or more.

[0117] A plurality of second support plates 1212 are provided and arranged at intervals so that these second support plates 1212 can cooperate to stably support an object such as a seat.

[0118] The plurality of second support plates 1212 are arranged at intervals along the first direction, which means that these second support plates 1212 are sequentially arranged along the first direction. If a plurality of second support plates 1212 are used to form the main body of the cross beam 12, then the first direction forms the length direction of the cross beam 12, and the length of each second support plate 1212 can be set relatively short, which is convenient for integrally forming on the side of the cover plate 11 facing away from the accommodation space 10, such as being convenient for integrally casting and forming and facilitating processing and fabrication.

[0119] Using a plurality of second support plates 1212 arranged at intervals has a simple structure, is convenient for integrally forming on the top surface of the cover plate 11, and is convenient for processing and fabrication.

[0120] Please refer to Figures 4 to 12 , in some embodiments, the cross beam 12 further includes a reinforcing rib 122 connected to the support plate 121.

[0121] The reinforcing rib 122 refers to a rib structure provided on the cover plate 11 to play a role in increasing the structural strength.

[0122] The reinforcing rib 122 is provided to enhance the structural strength of the cross beam 12.

[0123] In some embodiments, a plurality of reinforcing ribs 122 can be provided to enhance the structural strength of the cross beam 12.

[0124] In some embodiments, please refer to Figure 6 and Figure 7 , a plurality of reinforcing ribs 122 are cross - arranged.

[0125] The cross - arrangement means that one structure intersects with another structure at an angle.

[0126] The reinforcing ribs 122 are arranged crosswise to enhance the structural strength of the crossbeam 12 and also facilitate the processing and manufacturing of the crossbeam 12.

[0127] In some embodiments, the reinforcing ribs 122 are arranged in a grid pattern.

[0128] The grid pattern refers to an arrangement like a grid, usually a pattern or structure formed by intersecting in two mutually perpendicular directions.

[0129] The reinforcing ribs 122 are arranged in a grid pattern to enhance the structural strength of the crossbeam 12 and also facilitate the processing and manufacturing of the crossbeam 12.

[0130] In some embodiments, the reinforcing ribs 122 can also be arranged in other shapes, such as in a wavy shape, etc.

[0131] In some embodiments, please refer to Figures 4 to 7 , there are reinforcing ribs 122 arranged between at least two first support plates 1211.

[0132] When the number of the first support plates 1211 is two, the reinforcing ribs 122 connect the two first support plates 1211. When the number of the first support plates 1211 is three, four, etc., the reinforcing ribs 122 can be arranged between two of the first support plates 1211, or can be arranged between any two of the first support plates 1211.

[0133] In some embodiments, please refer to Figures 9 to 12 , there are reinforcing ribs 122 arranged between at least two of the second support plates 1212.

[0134] The reinforcing ribs 122 refer to the rib structures provided on the cover plate 11 to play the role of increasing the structural strength.

[0135] When the number of the second support plates 1212 is two, the reinforcing ribs 122 connect the two second support plates 1212. When the number of the second support plates 1212 is three, four, etc., the reinforcing ribs 122 can be arranged between two of the second support plates 1212, or can be arranged between any two of the second support plates 1212. Arranging the reinforcing ribs 122 between any two of the second support plates 1212 can enhance the structural strength of the crossbeam 12.

[0136] Please refer to Figures 9 to 12 , in some embodiments, the length direction of the second support plate 1212 is arranged at an angle with the length direction of the crossbeam 12.

[0137] The length direction of the second support plate 1212 is arranged at an angle with the length direction of the cross beam 12, which means that the length direction of the second support plate 1212 and the length direction of the cross beam 12 have a certain angle, and this angle can be an acute angle, a right angle or an obtuse angle. The length direction of the second support plate 1212 refers to the direction perpendicular to the top surface of the cover plate 11 and perpendicular to the plane where the second support plate 1212 is located.

[0138] Please refer to Figure 9 and Figure 10 , in some embodiments, the length direction of the second support plate 1212 is perpendicularly arranged with respect to the length direction of the cross beam 12 for the design, processing and manufacturing of the second support plate 1212.

[0139] Of course, please refer to Figure 11 and Figure 12 , the length direction of the second support plate 1212 and the length direction of the cross beam 12 can also be inclined, that is, the included angle between the length direction of the second support plate 1212 and the length direction of the cross beam 12 is an acute angle.

[0140] In some embodiments, the cross beam 12 can include both the second support plate 1212 and the first support plate 1211. For example, two first support plates 1211 are provided, and the second support plate 1212 is arranged between the two first support plates 1211 to support objects such as seats through the cooperation of the first support plate 1211 and the second support plate 1212.

[0141] In some embodiments, when the cross beam 12 includes the second support plate 1212 and the first support plate 1211, the second support plate 1212 can be connected to the first support plate 1211, so that the second support plate 1212 can also function as a reinforcing rib 122 to enhance the structural strength of the cross beam 12.

[0142] Please refer to Figure 7 , in some embodiments, a connecting column 13 is provided in the cross beam 12.

[0143] The connecting column 13 refers to a rod-shaped or columnar structure used to connect external objects such as seats.

[0144] The connecting column 13 is arranged in the cross beam 12 to connect to an external structure.

[0145] In some embodiments, a connecting hole 131 can be provided on the connecting column 13 to facilitate the connection of external objects such as seats. The connecting hole 131 refers to a hole structure provided on the connecting column 13, which can be a blind hole, a clamping hole, a threaded hole or the like.

[0146] In some embodiments, the connecting column 13 and the cross beam 12 are of an integrally formed structure.

[0147] The connecting column 13 and the cross beam 12 are integrally formed, which is not only convenient for processing and manufacturing, but also can make the connection between the connecting column 13 and the cross beam 12 firm. Of course, the connecting column 13 can also be manufactured separately and then welded to the cross beam 12.

[0148] In some embodiments, the connecting column 13 can be integrally formed with the cover plate 11, such as integrally forming the connecting column 13 on the top surface of the cover plate 11, so as to facilitate the processing, manufacturing, installation and fixation of the connecting column 13. Of course, the connecting column 13 can also be manufactured separately and then welded to the cover plate 11.

[0149] In some embodiments, the connecting column 13 can be connected to the cover plate 11 and the cross beam 12. For example, the lower end of the connecting column 13 is connected to the cover plate 11, and the side surface of the connecting column 13 is connected to the cross beam 12 to install and fix the connecting column 13.

[0150] In some embodiments, when the connecting column 13 and the cross beam 12 are integrally formed and the cross beam 12 includes the reinforcing rib 122, the connecting column 13 and the reinforcing rib 122 can be connected into one body, that is, the reinforcing rib 122 passes through the connecting column 13 to fix the connecting column 13.

[0151] In some embodiments, when multiple reinforcing ribs 122 are arranged in a crosswise manner, the connecting column 13 can be arranged at the intersection of the reinforcing ribs 122 to better fix the connecting column 13. When the connecting column 13 and the cross beam 12 are integrally formed, it is also convenient for the processing and manufacturing of the connecting column 13.

[0152] In some embodiments, please refer to Figure 8 、 Figures 13 to 15 , a flow channel 110 is provided in the cover plate 11.

[0153] The flow channel 110 refers to a channel for fluid to flow through.

[0154] By arranging the flow channel 110 in the cover plate 11, the coolant supply system can be connected so that the coolant flows through the flow channel 110, thereby controlling the temperature of the cover plate 11, and further controlling the temperature of the battery 1001 using the cover plate 11.

[0155] In some embodiments, please refer to Figures 2 to 4 , and Figure 8, when the cover plate 11 is provided with a flow channel 110 and the box body structure 100 is used for the battery 1001, the battery cell 200 can be placed upside down in the box body structure 100, so that the side of the battery cell 200 facing away from the electrode terminal 23 contacts the cover plate 11, so that the cover plate 11 can dissipate heat from the battery cell 200. The electrode terminal 23 is generally arranged on the top surface in the height direction of the battery cell 200, and the bottom surface of the battery cell 200 is the side of the battery cell 200 facing away from the electrode terminal 23. When the battery cell 200 is installed in the box body structure 100, when the bottom surface of the battery cell 200 is placed at the bottom of the box body structure 100, the battery cell 200 is called a positive setting; when the bottom surface of the battery cell 200 is placed on the top of the box body structure 100, that is, when the bottom surface of the battery cell 200 contacts the cover plate 11, the battery cell 200 is called an inverted setting.

[0156] In some embodiments, please refer to Figure 5 and Figure 8 , the cover plate 11 includes a top plate 111 and a sealing plate 112 connected to the top plate 111. A flow channel groove is provided on the top plate 111, and the sealing plate 112 covers the flow channel groove to form the flow channel 110. The cross beam 12 is integrally formed on the top plate 111.

[0157] The top plate 111 refers to the plate member used to form the flow channel groove. The sealing plate 112 refers to the plate member installed at the bottom of the top plate 111 to cover the flow channel groove, so that the internal space of the flow channel groove forms the flow channel 110.

[0158] Since the cross beam 12 is integrally formed on the side of the cover plate 11 facing away from the accommodation space 10, the cross beam 12 is integrally formed on the top plate 111, which is also convenient for integrating the cross beam 12 on the top plate 111 and convenient for processing and manufacturing.

[0159] Using the top plate 111 with a flow channel groove and connecting it with the sealing plate 112 to form the cover plate 11 and forming the flow channel 110 in the cover plate 11 is convenient for processing and manufacturing.

[0160] In some embodiments, pipe fittings can also be installed on the cover plate 11 to form the flow channel 110 on the cover plate 11.

[0161] In some embodiments, the cross beam 12 and the top plate 111 are integrally cast.

[0162] Casting is a manufacturing process mainly used for the production of metal parts. It is to pour the molten metal into a pre-made mold, and after cooling and solidifying, form the required shape and size. The cross beam 12 and the top plate 111 are integrally cast, that is, the integral cross beam 12 and top plate 111 formed by casting.

[0163] Integrally casting the cross beam 12 and the top plate 111 is convenient for processing and manufacturing, and is also convenient for integrally forming the cross beam 12 and the top plate 111.

[0164] In some embodiments, the cross beam 12 and the top plate 111 can also be integrally formed by forging or the like. Forging is a metal processing technology. The forging process mainly shapes the metal in a solid state to form the required shape and size.

[0165] In some embodiments, the top plate 111 includes a first aluminum layer 1111, the sealing plate 112 includes a second aluminum layer 1121, the first aluminum layer 1111 is connected to the second aluminum layer 1121, and a flow channel 110 is formed between the first aluminum layer 1111 and the second aluminum layer 1121.

[0166] The aluminum layer refers to a structural layer made of aluminum or an alloy containing aluminum.

[0167] The first aluminum layer 1111 refers to the aluminum layer used for the top plate 111. The second aluminum layer 1121 refers to the aluminum layer used for the sealing plate 112.

[0168] The sealing plate 112 uses the second aluminum layer 1121 to control the temperature of the devices inside the box structure 100. And the top plate 111 uses the first aluminum layer 1111 so that the flow channel 110 is formed between the first aluminum layer 1111 and the second aluminum layer 1121, so that the inner walls of the flow channel 110 are all aluminum layers, so as to have good corrosion resistance. In addition, the top plate 111 uses the first aluminum layer 1111, the sealing plate 112 uses the second aluminum layer 1121, and the first aluminum layer 1111 is connected to the second aluminum layer 1121 to connect the top plate 111 and the sealing plate 112, which is convenient for the firm connection between the top plate 111 and the sealing plate 112, and can reduce the weight of the cover plate 11.

[0169] Forming the flow channel 110 between the first aluminum layer 1111 and the second aluminum layer 1121 not only enables the cover plate 11 to have good heat conduction effect, but also enables the inner walls of the formed flow channel 110 to have good corrosion resistance.

[0170] In some embodiments, when the top plate 111 only includes the first aluminum layer 1111, that is, when the top plate 111 is an aluminum plate, since the cross beam 12 and the top plate 111 are integrally formed, the cross beam 12 is also made of aluminum, that is, the cross beam 12 is an aluminum beam to reduce the weight.

[0171] In some embodiments, the first aluminum layer 1111 and the second aluminum layer 1121 are connected by welding to facilitate the connection between the top plate 111 and the sealing plate 112 and improve the connection strength.

[0172] Please refer to Figure 13 , in some embodiments, the top plate 111 includes a first steel layer 1112, the first aluminum layer 1111 is disposed on the side of the first steel layer 1112 close to the sealing plate 112, and the cross beam 12 is a steel beam.

[0173] The steel layer refers to the structural layer made of steel. The steel beam refers to the beam made of steel.

[0174] The first steel layer 1112 refers to the steel layer used for the top plate 111.

[0175] The cross beam 12 is made of steel to enable the cross beam 12 to have high structural strength for connecting and supporting objects such as seats. The first steel layer 1112 is provided on the top plate 111, which can not only improve the structural strength of the top plate 111, and then improve the structural strength of the cover plate 11, but also facilitate integral molding with the cross beam 12.

[0176] The first steel layer 1112 is provided on the top plate 111 to improve the structural strength of the top plate 111, and then improve the structural strength of the cover plate 11; while the cross beam 12 uses a steel beam to enable the cross beam 12 to have high structural strength and also facilitate integral molding of the cross beam 12 on the top plate 111.

[0177] In some embodiments, when the top plate 111 includes the first steel layer 1112 and the first aluminum layer 1111, the first aluminum layer 1111 can be made on the first steel layer 1112 by means of bonding, electroplating, etc.

[0178] In some embodiments, the top plate 111 includes the first steel layer 1112 and the first aluminum layer 1111 which are stacked, and the thickness H11 of the first steel layer 1112 is greater than the thickness H12 of the first aluminum layer 1111. Setting the thickness H11 of the first steel layer 1112 to be larger can make the top plate 111 have higher structural strength, and setting the thickness H12 of the first aluminum layer 1111 to be smaller is convenient for processing and manufacturing.

[0179] In some embodiments, the thickness H11 of the first steel layer 1112 ranges from 0.5 mm to 2 mm. For example, the thickness H11 of the first steel layer 1112 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 top plate 111 has relatively light weight on the basis of having good structural strength.

[0180] In some embodiments, the thickness H12 of the first aluminum layer 1111 ranges from 0.05 mm to 0.5 mm. For example, the thickness H12 of the first aluminum layer 1111 can be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc., in order to facilitate the production of the material of the top plate 111.

[0181] In some embodiments, the top plate 111 can be made of a composite structure with not only two structural layers but also composite structures with three, four, or more structural layers. For example, the top plate 111 can include not only the first steel layer 1112 and the first aluminum layer 1111 arranged in a stacked manner but also other structural layers, such as structural layers made of materials like aluminum, steel, copper, etc.

[0182] Please refer to Figure 14 and Figure 15 In some embodiments, the sealing plate 112 includes a second steel layer 1122, and the second aluminum layer 1121 is arranged on one side of the second steel layer 1122 close to the top plate 111.

[0183] The second steel layer 1122 refers to a structural layer made of steel. By providing the second steel layer 1122 in the sealing plate 112, the structural strength of the cover plate 11 can be enhanced.

[0184] The second aluminum layer 1121 is arranged on one side of the second steel layer 1122 close to the top plate 111 so that the second aluminum layer 1121 can be welded to the first aluminum layer 1111.

[0185] The sealing plate 112 is provided with the second steel layer 1122 to enhance the structural strength of the sealing plate 112, thereby enhancing the structural strength of the box structure 100. And the second aluminum layer 1121 is arranged on the second steel layer 1122 to be connected to the first aluminum layer 1111 of the top plate 111.

[0186] In some embodiments, the sealing plate 112 can include the second aluminum layer 1121 and the second steel layer 1122, and the second steel layer 1122 and the second aluminum layer 1121 are arranged in a stacked manner, that is, the sealing plate 112 uses a steel-aluminum composite structure to make the sealing plate 112 have good structural strength.

[0187] In some embodiments, the second aluminum layer 1121 and the second steel layer 1122 can be stacked and connected by means such as pressing, bonding, explosive pressing, etc., and then stamped into shape. Of course, the second aluminum layer 1121 can also be plated on the second steel layer 1122.

[0188] In some embodiments, the sealing plate 112 includes the second steel layer 1122 and the second aluminum layer 1121 arranged in a stacked manner, and the thickness H21 of the second steel layer 1122 is greater than the thickness H22 of the second aluminum layer 1121. By setting the thickness H21 of the second steel layer 1122 to be relatively large, the structural strength of the sealing plate 112 can be relatively high, and by setting the thickness H22 of the second aluminum layer 1121 to be relatively small, it is convenient for processing and manufacturing and is also convenient for welding to the cross beam 12.

[0189] In some embodiments, the thickness H21 of the second steel layer 1122 ranges from 0.5 mm to 2 mm. For example, the thickness H11 of the second steel layer 1122 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 produced sealing plate 112 has relatively light weight while having good structural strength.

[0190] In some embodiments, the thickness H22 of the second aluminum layer 1121 ranges from 0.05 mm to 0.5 mm. For example, the thickness H22 of the second aluminum layer 1121 can be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm, 0.5 mm, etc., so as to facilitate the production of the material of the sealing plate 112 and facilitate welding connection with the cross beam 12.

[0191] In some embodiments, the sealing plate 112 can not only use a composite structure made of two structural layers, but also use a composite structure of three, four or more structural layers. For example, the sealing plate 112 can not only include the second steel layer 1122 and the second aluminum layer 1121 arranged in a stacked manner, but also include other structural layers, such as structural layers made of materials such as aluminum, steel, and copper.

[0192] Please refer to Figure 16 , in some embodiments, a reinforcing beam 14 is provided in the accommodation space 10.

[0193] The reinforcing beam 14 refers to a beam structure provided in the accommodation space 10. The beam structure refers to a rod-shaped or columnar structure made of materials such as metal, such as steel, aluminum alloy, and rigid plastic, with a length greater than the width and a length greater than the thickness.

[0194] A reinforcing beam 14 is provided in the accommodation space 10 to increase the structural strength of the box structure 100.

[0195] In some embodiments, a reinforcing beam 14 is provided at a position corresponding to the cross beam 12 in the accommodation space 10.

[0196] The position corresponding to the cross beam 12 in the accommodation space 10 refers to the area corresponding to the projection of the cross beam 12 in the accommodation space 10. If a reinforcing beam 14 is provided at the position corresponding to the cross beam 12 in the accommodation space 10, at least part of the cross beam 12 can be supported on the reinforcing beam 14 to stably support the cross beam 12, so as to connect and support objects such as seats.

[0197] Providing a reinforcing beam 14 at a position corresponding to the cross beam 12 can not only increase the structural strength of the box structure 100, but also more stably support the cross beam 12.

[0198] In some embodiments, the arrangement of the reinforcing beam 14 can also be offset from the position of the cross beam 12. Of course, the reinforcing beam 14 can be arranged not only at the corresponding position of the cross beam 12, but also at other positions in the accommodation space 10 to facilitate the arrangement of the position of the reinforcing beam 14.

[0199] In some embodiments of the present application, the present application provides a box structure 100, including a lower box body 102 and a cover. The cover plate 11 and the lower box body 102 together form an accommodation space 10. The cover plate 11 includes a top plate 111 and a sealing plate 112 connected to the top plate 111. A flow channel groove is provided on the top plate 111, and the sealing plate 112 covers the flow channel groove to form a flow channel 110. The cross beam 12 is integrally cast with the top plate 111. The cross beam 12 is integrally cast with the top plate 111. The top plate 111 includes a first aluminum layer 1111, and the cross beam 12 is made of aluminum. The sealing plate 112 includes a second aluminum layer 1121, and the first aluminum layer 1111 is welded to the second aluminum layer 1121. A connecting column 13 is provided in the cross beam 12. The cross beam 12 includes a support plate 121 for supporting a seat and a reinforcing rib 122 connected to the support plate 121. The support plate 121 is integrally formed on the side of the top plate 111 facing away from the accommodation space 10, and a plurality of reinforcing ribs 122 are arranged in a cross manner.

[0200] The top plate 111 uses the first aluminum layer 1111, and the cross beam 12 is made of aluminum, which is convenient for integrally forming the cross beam 12 and the top plate 111, improving the stability and reliability of the connection between the cross beam 12 and the cover plate 11, and can also reduce the weight. The sealing plate 112 uses the second aluminum layer 1121, so as to be welded and connected to the first aluminum layer 1111, and then firmly connect the top plate 111 and the sealing plate 112. A flow channel 110 is formed between the sealing plate 112 and the top plate 111, which is convenient for the processing and manufacturing of the flow channel 110, and can also improve the corrosion resistance of the inner wall of the flow channel 110. A connecting column 13 is provided on the cross beam 12 to connect objects such as seats, and the cross beam 12 uses the support plate 121 to support the seat and is convenient for processing and manufacturing.

[0201] According to some embodiments of the present application, the present application also provides a battery, including the box structure described in any of the above solutions.

[0202] According to some embodiments of the present application, the present application also provides an electrical device, including the box structure described in any of the above solutions, or including the battery described in any of the above solutions.

[0203] The electrical device can be any of the aforementioned devices or systems that use the battery.

[0204] In some embodiments, the electrical device is a vehicle, and the cross beam 12 is a seat beam of the vehicle 1000. The seat beam refers to the beam used to install the seat in the vehicle.

[0205] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A box structure, characterized in that, Comprising: Lower box body; Cover plate, covering the lower box body and jointly forming a receiving space with the lower box body; Cross beam, used to connect the seat, and the cross beam is integrally formed on the surface of the cover plate facing away from the receiving space.

2. The box structure according to claim 1, characterized in that, The cross beam includes a support plate for supporting the seat, and the support plate is integrally formed on the surface of the cover plate facing away from the receiving space.

3. The box structure according to claim 2, characterized in that, The support plate includes a plurality of first support plates arranged at intervals, and each of the first support plates extends along a first direction.

4. The box structure according to claim 2, wherein The support plate includes a plurality of second support plates arranged at intervals, and the plurality of second support plates are arranged at intervals along the first direction.

5. The box structure according to any one of claims 2-4, characterized in that, The cross beam further includes a reinforcing rib connected to the support plate.

6. The box body structure according to claim 5, wherein, A plurality of the reinforcing ribs are arranged in a cross pattern.

7. The box structure according to any one of claims 1-4, characterized in that, A connecting column is provided in the cross beam.

8. The box structure according to claim 7, characterized in that, The connecting column and the cross beam are of an integrally formed structure.

9. The box structure according to any one of claims 1-4, characterized in that, A flow channel is provided in the cover plate.

10. The box structure according to claim 9, characterized in that, The cover plate includes a top plate and a sealing plate connected to the top plate. A flow channel groove is provided on the top plate, and the sealing plate covers the flow channel groove to form the flow channel. The cross beam is integrally formed on the top plate.

11. The box structure according to claim 10, characterized in that, The cross beam and the top plate are integrally cast.

12. The box structure according to claim 10 or 11, characterized in that, The top plate includes a first aluminum layer, the sealing plate includes a second aluminum layer, the first aluminum layer is connected to the second aluminum layer, and the flow channel is formed between the first aluminum layer and the second aluminum layer.

13. The box structure according to claim 12, characterized in that, The top plate includes a first steel layer, the first aluminum layer is arranged on the side of the first steel layer close to the sealing plate, and the cross beam is a steel beam.

14. The box structure according to claim 12, characterized in that, The sealing plate includes a second steel layer, and the second aluminum layer is arranged on the side of the second steel layer close to the top plate.

15. The box structure according to any one of claims 1-4, characterized in that, A reinforcing beam is provided at a position corresponding to the cross beam in the receiving space.

16. A battery, characterized in that, Comprising the box body structure according to any one of claims 1-15.

17. An electrical device, characterized in that, Comprising the box body structure according to any one of claims 1-15, or comprising the battery according to claim 16.

18. The electrical device according to claim 17, wherein, The electrical device is a vehicle, and the cross beam is the seat beam of the vehicle.

Images