Battery box, battery, and electrical device

Abstract

Provided in the present application are a battery box, a battery, and an electrical device. The battery comprises battery cells and a box body. The box body comprises a frame structure and a cover assembly. The frame structure defines a first accommodation space for accommodating the battery cells, and the first accommodation space is provided with a first opening. The frame structure comprises a wall plate, the wall plate comprises a main body portion and a first bending portion connected to each other, and the first bending portion bends relative to the main body portion towards a side facing away from the first accommodation space. The cover assembly is connected to the first bending portion and covers the first opening. In the foregoing structure, the cover assembly is connected to the first bending portion that is in the wall plate of the frame structure and that bends relative to the main body portion toward a side facing away from the first accommodation space. As a result, the cover assembly can connect to the frame structure and cover the first opening by means of connecting to the wall plate having a relatively thin thickness, thereby reducing the mass and material of the frame structure and facilitating the lightweight design of the battery.

Description

Battery box, battery and electric device Cross-reference to related applications

[0001] This application claims priority to Chinese Patent Application No. 202410732861.2, filed on June 6, 2024, entitled “Battery box, battery and electric device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, and in particular to a battery box, a battery and an electric device. BACKGROUND

[0003] Batteries have high specific energy and high power density, and are widely used in electronic devices and vehicles, such as mobile phones, notebook computers, electric vehicles, electric cars, electric planes, electric ships and electric tools, etc.

[0004] With the continuous expansion of the application range of batteries in various fields, the market demand for batteries is increasing. How to reduce the cost of batteries is increasingly concerned by those skilled in the art. SUMMARY

[0005] In view of the above problems, the present application provides a battery box, a battery and an electric device, which have good lightweight effect.

[0006] In a first aspect, some embodiments of the present application provide a battery, which comprises a battery cell and a battery box, the battery box comprising a frame structure and a cover assembly, the frame structure forming a first accommodating space for accommodating the battery cell, the first accommodating space having a first opening; the frame structure comprises a wall plate, the wall plate comprising a main body portion and a first bending portion connected to each other, the first bending portion being bent away from the first accommodating space relative to the main body portion; and the cover assembly is connected to the first bending portion and covers the first opening.

[0007] In the above structure, the wall plate comprises a main body portion and a first bending portion connected to each other, and the first bending portion is bent away from the first accommodating space relative to the main body portion to provide a connection position for the cover assembly, so that the cover assembly is connected to the frame structure and covers the first opening by connecting to the first bending portion. Thus, the frame structure can connect the cover assembly through the wall plate, and compared with the hollow profile structure, the thickness of the wall plate is thinner, which reduces the mass and material of the frame structure, and is beneficial to the lightweight of the battery. In addition, the frame structure is only partially a wall plate, which not only meets the crashworthiness performance of the battery, but also meets the assembly requirements of the battery, and the structure design is more reasonable.

[0008] According to the battery provided by some embodiments of the present application, the frame structure further comprises a side beam connected with the wall plate, the side beam comprises a main beam and a connecting wall connected with each other, and at least part of the connecting wall is bent away from one side of the first accommodating space. The connecting wall can provide a connecting position for connecting with other parts in the box by being bent away from one side of the first accommodating space. Since the connecting wall has a smaller thickness than the main beam, the mass and material of the side beam can be reduced, and the lightweight effect of the battery can be improved.

[0009] According to the battery provided by some embodiments of the present application, the connecting wall comprises a surrounding part and a second bent part connected with each other, the surrounding part is connected between the second bent part and the main beam, and the second bent part is bent away from one side of the first accommodating space relative to the surrounding part, and the second bent part is used to provide a connecting position for connecting with other parts in the box.

[0010] According to the battery provided by some embodiments of the present application, the side beam further comprises a first connecting piece arranged on the second bent part. By arranging the first connecting piece on the second bent part, other parts in the box can be connected with the connecting wall of the side beam through the first connecting piece, so that other parts in the box can be connected with the frame structure.

[0011] According to the battery provided by some embodiments of the present application, the side beam further comprises a connecting plate connected with the main beam, the connecting plate extends into the first accommodating space, and the cover assembly is connected with the connecting plate. By arranging the connecting plate on the main beam of the side beam, the cover assembly can be conveniently connected with the side beam by being connected with the connecting plate.

[0012] According to the battery provided by some embodiments of the present application, a first cavity is arranged in the main beam, which is used to reduce the material of the side beam. The cost of the side beam can be reduced, and the lightweight effect of the side beam can be achieved.

[0013] According to the battery provided by some embodiments of the present application, the frame structure further comprises a plurality of reinforcing beams arranged at intervals along a first direction, two side beams are arranged relative to each other along a second direction, the plurality of reinforcing beams are connected between the two side beams, and the cover assembly, the reinforcing beams and the side beams surround the first accommodating space.

[0014] According to the battery provided by some embodiments of the present application, two wall plates are arranged relative to each other along the first direction, the reinforcing beams are arranged between the two wall plates, the reinforcing beams are arranged at intervals with the wall plates, the side beams, the reinforcing beams, the wall plates and the cover assembly surround a second accommodating space, and the battery further comprises a battery management assembly accommodated in the second accommodating space, so that the battery management assembly can be protected by the box.

[0015] According to the battery provided by some embodiments of the present application, the cover assembly comprises a protective plate connected with the first bent part and the main beam, so that the protective plate can be firmly connected with the frame structure.

[0016] According to the battery provided by some embodiments of the present application, the cover assembly further comprises a wall plate and a heat exchange pipe, the wall plate is arranged opposite to the protective plate along the thickness direction of the wall plate, the heat exchange pipe is located between the wall plate and the protective plate and connected to the wall plate, and the wall plate is connected to the edge beam. A space can be formed outside the first accommodating space between the protective plate and the wall plate, so that the heat exchange pipe and other components can be arranged in the space formed between the protective plate and the wall plate, and the components can be protected by the protective plate.

[0017] According to the battery provided by some embodiments of the present application, the cover assembly further comprises a buffer structure, the buffer structure is located between the wall plate and the protective plate, the buffer structure is formed with an accommodating groove, and at least part of the heat exchange pipe is located in the accommodating groove. By arranging the buffer structure between the wall plate and the protective plate, the impact and vibration of the protective plate can be buffered by the buffer structure before being transmitted to the wall plate and the first accommodating space, which is beneficial to reducing the impact and vibration of the battery monomer in the wall plate and the first accommodating space.

[0018] According to the battery provided by some embodiments of the present application, the cover assembly further comprises a heat-conducting adhesive layer, and the heat exchange pipe is connected to the wall plate through the heat-conducting adhesive layer. The heat exchange pipe is bonded to the wall plate through the heat-conducting adhesive layer, which not only makes the heat exchange pipe easy to connect to the wall plate, but also makes the heat transfer between the heat exchange pipe and the wall plate good.

[0019] According to the battery provided by some embodiments of the present application, the wall plate further comprises a third bending part connected to the main body part, the third bending part is bent away from the first accommodating space relative to the main body part and arranged opposite to the first bending part. The third bending part can provide a connection position to connect with other parts in the box body. Since the wall plate has a relatively thin thickness, it can reduce the mass and material of the frame structure, which is beneficial to the lightweight of the battery.

[0020] According to the battery provided by some embodiments of the present application, the wall plate further comprises a second connecting part arranged on the third bending part. By arranging the second connecting part on the third bending part, other parts in the box body can be connected to the wall plate through the second connecting part, so that other parts in the box body can be connected to the frame structure.

[0021] According to the battery provided by some embodiments of the present application, the box body further comprises a cover plate, the cover plate is arranged opposite to the cover assembly along the thickness direction of the cover assembly, and the cover plate covers the first opening.

[0022] In a second aspect, some embodiments of the present application provide a battery case of a battery, the battery case comprising a frame structure and a cover assembly, the frame structure forming a first accommodating space for accommodating a battery monomer, the first accommodating space having a first opening; the frame structure comprising a wall plate, the wall plate comprising a main body portion and a first bent portion connected to each other, the first bent portion bent away from the first accommodating space relative to the main body portion; the cover assembly connected to the first bent portion and covering the first opening.

[0023] In a third aspect, some embodiments of the present application provide an electric device, the electric device comprising the battery provided in any of the technical solutions above, the battery being configured to provide electric energy.

[0024] The technical solutions provided by the embodiments of the present application at least have the following beneficial effects:

[0025] The present application provides a battery, the battery comprising a battery monomer and a case, the case comprising a frame structure and a cover assembly, the frame structure forming a first accommodating space for accommodating the battery monomer, the first accommodating space having a first opening; the frame structure comprising a wall plate, the wall plate comprising a main body portion and a first bent portion connected to each other, the first bent portion bent away from the first accommodating space relative to the main body portion; the cover assembly connected to the first bent portion and covering the first opening. In the above structure, the wall plate comprises the main body portion and the first bent portion connected to each other, the first bent portion bent away from the first accommodating space relative to the main body portion, thereby providing a connection position for the cover assembly, so that the cover assembly is connected to the frame structure and covers the first opening by being connected to the first bent portion. Thus, the frame structure can connect the cover assembly through the wall plate, and compared with the hollow profile structure, the thickness of the wall plate is thinner, thereby reducing the mass and material of the frame structure, which is beneficial to the lightweight of the battery. In addition, the frame structure is only partially the wall plate, which can not only meet the crashworthiness of the battery, but also meet the assembly requirements of the battery, and the structure design is more reasonable.

[0026] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood, and to be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0027] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are intended to further aid the understanding of the preferred embodiments, and are not intended to limit the application thereto. Moreover, like reference numerals denote like parts throughout the several views in the drawings. In the drawings:

[0028] FIG. 1 is a structural schematic view of a vehicle provided by some embodiments of the present application;

[0029] Fig. 2 is a split schematic diagram of a battery according to some embodiments of the present application;

[0030] Fig. 3 is a top view of a box of a battery according to some embodiments of the present application;

[0031] Fig. 4 is a left view of a box of a battery according to some embodiments of the present application;

[0032] Fig. 5 is a sectional view of A-A in Fig. 3;

[0033] Fig. 6 is a sectional view of B-B in Fig. 4;

[0034] Fig. 7 is an enlarged view of C in Fig. 6.

[0035] In the drawings:

[0036] 1, frame structure; 11, first accommodating space; 111, first opening;

[0037] 12, wall plate; 121, main body part; 122, first bending part; 123, third bending part; 124, second connecting piece;

[0038] 13, edge beam; 131, main beam; 1311, first cavity; 132, connecting wall; 1321, surrounding part; 1322, second bending part; 133, first connecting piece; 134, connecting plate;

[0039] 14, reinforcing beam; 15, second accommodating space;

[0040] 2, cover assembly; 21, wall plate; 22, heat exchange pipe; 23, guard plate; 24, buffer structure; 241, accommodating groove; 25, heat-conducting adhesive layer;

[0041] 10, box;

[0042] 20, battery cell; 1000, vehicle; 100, battery; 200, controller; 300, motor. X, first direction; Y, second direction. DETAILED DESCRIPTION

[0043] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0044] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meaning understood by the skilled person in the field to which the embodiments of the present application belong.

[0045] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0046] In addition, the technical terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0047] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0048] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0049] At present, from the development of market situation, the application of battery is more and more widely. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0050] With the expanding application range of batteries in various fields, cost reduction of the batteries has become an important research direction for those skilled in the art.

[0051] 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.

[0052] The battery cell can be a secondary battery cell, which refers to a battery cell that can be activated by charging after the battery cell is discharged.

[0053] The battery cell can be a lithium ion battery cell, a sodium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel hydrogen battery cell, a nickel cadmium battery cell, a lead-acid battery cell, etc.

[0054] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or a battery cell of other shapes, and the prismatic battery cell includes a square cell, a blade cell, a multi-prismatic battery cell, such as a hexagonal prismatic battery cell, etc.

[0055] In some embodiments, the battery can be a battery module, and when there are multiple battery cells, the multiple battery cells are arranged and fixed to form a battery module.

[0056] In some embodiments, the battery can be a battery pack, and the battery pack includes a box body and battery cells, and the battery cells or the battery module are accommodated in the box body.

[0057] In some embodiments, the box body can be part of the chassis structure of a vehicle. For example, part of the box body can be at least part of the floor of the vehicle, or part of the box body can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0058] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0059] Since the battery cell generates heat during charging and discharging, in order to maintain the battery cell in an appropriate temperature range, a heat exchange plate or other heat exchange member is usually arranged in the battery to exchange heat with the battery cell. Since the manufacturing process of the heat exchange plate is complex, and its assembly in the battery is also relatively cumbersome, this is not conducive to the reduction of the cost of the battery.

[0060] In order to reduce the cost of the battery, the application provides a battery, which comprises a battery cell and a box body, the box body comprising a frame structure and a cover assembly, the frame structure forming a first accommodating space for accommodating the battery cell, the first accommodating space having a first opening; the frame structure comprising a wall plate, the wall plate comprising a main body portion and a first bending portion connected to each other, the first bending portion being bent away from a side of the main body portion facing away from the first accommodating space; and the cover assembly being connected to the first bending portion and covering the first opening. In the above structure, the wall plate comprises the main body portion and the first bending portion connected to each other, and the first bending portion is bent away from the side of the main body portion facing away from the first accommodating space to provide a connection position for the cover assembly, so that the cover assembly is connected to the frame structure and covers the first opening by being connected to the first bending portion. Therefore, the frame structure can connect the cover assembly through the wall plate, and compared with the hollow profile structure, the thickness of the wall plate is thinner, the mass and material of the frame structure are reduced, and the lightweight of the battery is facilitated. In addition, the frame structure is only partially the wall plate, which can not only meet the crashworthiness of the battery, but also meet the assembly requirements of the battery, and the structure design is more reasonable.

[0061] The battery described in the embodiments of the application is suitable for a power consumption device using the battery.

[0062] The power consumption device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, and an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy, and an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, and an electric planer, etc. The embodiments of the application do not specially limit the above power consumption devices.

[0063] The following embodiments take a vehicle as an example for convenience of description.

[0064] Please refer to FIG. 1, which is a structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0065] In some embodiments of the present application, the battery 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0066] Referring to FIG. 2, the battery 100 includes a box body 10 and a battery monomer 20, the battery monomer 20 being accommodated in the box body 10. The box body 10 is used to provide an accommodation space for the battery monomer 20. The battery monomer 20 in the battery 100 can be multiple, and the multiple battery monomers 20 can be connected in series, in parallel, or in a mixed connection, the mixed connection referring to that the multiple battery monomers 20 are connected in series and in parallel. The multiple battery monomers 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery monomers 20 is accommodated in the box body 10; of course, the battery 100 can also be that the multiple battery monomers 20 are first connected in series, in parallel, or in a mixed connection to form a battery module, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and the whole is accommodated in the box body 10.

[0067] The box body 10 can have various shapes, such as a cuboid, a cylinder, etc. The box body 10 can include a first part and a second part, the first part being a hollow structure with one side open, and the second part covering the open side of the first part, thereby forming the box body 10 with a placing space.

[0068] The battery 100 can further include other structures, for example, the battery 100 can further include a current combing component, which is used to realize electrical connection between the multiple battery monomers 20.

[0069] Each battery monomer 20 can be a secondary battery monomer or a primary battery monomer; can also be a lithium-sulfur battery monomer, a sodium-ion battery monomer, or a magnesium-ion battery monomer, but is not limited thereto. The battery monomer 20 can have a cylindrical shape, a flat shape, a cuboid shape, or other shapes, etc.

[0070] With reference back to FIG. 2, the battery 100 comprises the battery cell 20 and the case 10, the case 10 comprises the frame structure 1 and the cover assembly 2, the frame structure 1 forms a first receiving space 11 for receiving the battery cell 20, the first receiving space 11 has a first opening 111. With reference to FIG. 3, the frame structure 1 is partially a wall plate 12, with reference back to FIG. 2 and FIG. 7, the wall plate 12 comprises a main body portion 121 and a first bending portion 122 connected to each other, the first bending portion 122 is bent away from a side of the main body portion 121 facing the first receiving space 11; the cover assembly 2 is connected to the first bending portion 122 and covers the first opening 111.

[0071] The frame structure 1 can be a frame structure in the case 10, which serves as a skeleton in the case 10. The frame structure 1 forms the first receiving space 11, which can mean that the frame structure 1 is arranged around to enclose the first receiving space 11, the first receiving space 11 serves as a space structure in the case 10 for receiving the battery cell 20. The first opening 111 can be an opening in the first receiving space 11, which communicates the first receiving space 11 with the outside. Exemplarily, the first receiving space 11 has two first openings 111 facing opposite directions.

[0072] The wall plate 12 can be a solid wall structure in the frame structure 1, for example a solid thin wall structure, the wall plate 12 can be formed by bending a plate structure with a relatively thin thickness. The frame structure 1 is partially the wall plate 12, which can mean that the wall plate 12 is a partial structure in the frame structure 1. Exemplarily, a part of the frame structure 1 is the wall plate 12, and another part is a hollow profile structure, the thickness of the wall plate 12 is thinner than that of the hollow core structure. The main body portion 121 can be a main part in the wall plate 12, other parts in the wall plate 12 such as the first bending portion 122 are connected to and supported by the main body portion 121. The first bending portion 122 is bent away from a side of the main body portion 121 facing the first receiving space 11, which can mean that the first bending portion 122 is bent relative to the extension direction of the main body portion 121, so that the first bending portion 122 can provide a connection position for connecting the cover assembly 2 to the frame structure 1 in the case 10. Due to the relatively thin thickness of the wall plate 12, compared with the hollow profile structure, it can reduce the mass and material of the frame structure 1, which is beneficial to improve the lightweight effect of the battery 100.

[0073] The cover assembly 2 can be a plurality of components constituting a wall structure in the case 10, which is connected to the frame structure 1 and covers the first opening 111, so as to enclose the first receiving space 11 together with the frame structure 1. Exemplarily, the cover assembly 2 can cover one of the two first openings 111.

[0074] In the above structure, the wall plate 12 comprises a main body part 121 and a first bending part 122 connected with each other, the first bending part 122 is bent to a side away from the first accommodating space 11 relative to the main body part 121 to provide a connecting position for the cover assembly 2, so that the cover assembly 2 is connected with the frame structure 1 and covers the first opening 111 by being connected with the first bending part 122, thereby the frame structure 1 can connect the cover assembly 2 through the wall plate 12, and compared with the hollow profile structure, the thickness of the wall plate 12 is thinner, which reduces the mass and material of the frame structure 1, and is beneficial to the lightweight of the battery 100; in addition, the frame structure 1 is only partially the wall plate 12, which not only can meet the crashworthiness of the battery 100, but also can meet the assembly requirement of the battery 100, and the structure design is more reasonable.

[0075] In some embodiments, referring to FIG. 4, the frame structure 1 further comprises a side beam 13 connected with the wall plate 12, referring to FIG. 5, the side beam 13 comprises a main beam 131 and a connecting wall 132 connected with each other, at least part of the connecting wall 132 is bent to a side away from the first accommodating space 11.

[0076] The side beam 13 can be a component of the frame structure 1, the side beam 13 can serve as a mounting structure of the battery 100, and the battery 100 is fixed on the vehicle 1000 through the side beam 13, which is beneficial to meet the assembly requirement of the battery 100 on the vehicle 1000. The main beam 131 can be a main structure in the side beam 13, which is used to bear other components in the side beam 13 or connect with components such as the cover assembly 2, and can support the box body 10.

[0077] The connecting wall 132 can be a wall structure extending from the main beam 131, which can provide a connecting position to connect with other parts in the box body 10 by being bent to a side away from the first accommodating space 11. The main beam 131 can be a hollow profile structure, and the connecting wall 132 can be a solid wall structure, for example, a solid thin wall structure. Since the connecting wall 132 has a thinner thickness compared with the main beam 131, it can reduce the mass and material of the side beam 13, which is beneficial to improve the lightweight effect of the battery 100.

[0078] In some embodiments, the connecting wall 132 comprises a surrounding part 1321 and a second bending part 1322 connected with each other, the surrounding part 1321 is connected between the second bending part 1322 and the main beam 131, and the second bending part 1322 is bent to a side away from the first accommodating space 11 relative to the surrounding part 1321.

[0079] The surrounding portion 1321 can be a portion of the connecting wall 132 directly connected to the main beam 131, which can be used together with the main beam 131 to surround the first accommodating space 11. The second bending portion 1322 can be a portion of the connecting wall 132 connected to the surrounding portion 1321 and bent away from the side of the first accommodating space 11 relative to the surrounding portion 1321, and the second bending portion 1322 is used to provide a connecting position connected to other parts in the box 10.

[0080] In some embodiments, the edge beam 13 further comprises a first connecting member 133 arranged on the second bending portion 1322.

[0081] The first connecting member 133 can be a component for connecting with other parts in the box 10. By arranging the first connecting member 133 on the second bending portion 1322, other parts in the box 10 can be connected to the connecting wall 132 of the edge beam 13 through the first connecting member 133, so that other parts in the box 10 can be connected to the frame structure 1.

[0082] Exemplarily, the first connecting member 133 can be a nut connected to the second bending portion 1322, so that other parts in the box 10 can be connected to the second bending portion 1322 through a connecting bolt matched with the nut.

[0083] In some embodiments, the edge beam 13 further comprises a connecting plate 134 connected to the main beam 131, and the connecting plate 134 extends into the first accommodating space 11, and the cover assembly 2 is connected to the connecting plate 134.

[0084] The connecting plate 134 can be a plate structure connected to the main beam 131, which is used to connect with the cover assembly 2. By arranging the connecting plate 134 on the main beam 131 of the edge beam 13, the cover assembly 2 can be conveniently connected to the edge beam 13 by being connected to the connecting plate 134.

[0085] The connecting plate 134 extends into the first accommodating space 11, which can be that the connecting plate 134 protrudes towards the first accommodating space 11 at the part of the main beam 131 close to the first opening 111, so that not only the connecting plate 134 can be arranged at the first opening 111, but also at least part of the cover assembly 2 covering the first opening 111 is laminated with the connecting plate 134, so that the connecting plate 134 is conveniently connected to the cover assembly 2.

[0086] Exemplarily, the cover assembly 2 can be connected to the connecting plate 134 by adhesion, welding or the like, or the cover assembly 2 can be connected to the connecting plate 134 by connecting bolts, rivets or the like. In some embodiments, the connecting plate 134 and the cover assembly 2 are connected by self-piercing riveting technology, which is conducive to improving the convenience of connecting the connecting plate 134 and the cover assembly 2 and reducing the cost of assembling the battery 100.

[0087] In some embodiments, the first cavity 1311 is arranged in the main beam 131.

[0088] The first cavity 1311 can be a cavity structure arranged in the main beam 131, the first cavity 1311 penetrates the main beam 131 along the extension direction of the main beam 131, which is used to reduce the material of the side beam 13, not only can reduce the cost of the side beam 13, but also can realize the lightweight of the side beam 13.

[0089] Exemplarily, the first cavity 1311 can be provided with a plurality of first cavities 1311, and a plurality of first cavities 1311 are arranged in the main beam 131, which can improve the lightweight effect of the main beam 131.

[0090] In some embodiments, the frame structure 1 further comprises a plurality of reinforcing beams 14 arranged at intervals along the first direction X, the side beam 13 is oppositely provided with two along the second direction Y, and the plurality of reinforcing beams 14 are connected between the two side beams 13, the cover assembly 2, the reinforcing beam 14 and the side beam 13 surround the first containing space 11.

[0091] The reinforcing beam 14 can be a beam body in the frame structure 1 for improving the structural strength. By oppositely arranging two side beams 13 along the second direction Y and arranging a plurality of reinforcing beams 14 at intervals along the first direction X, the reinforcing beam 14 is connected between the two side beams 13, so that the reinforcing beam 14 and the side beam 13 can be partially surrounded by the frame structure 1 to form the first containing space 11 with the first opening 111. The cover assembly 2 is connected to the reinforcing beam 14 and the side beam 13, and covers the first opening 111, and the cover assembly 2, the reinforcing beam 14 and the side beam 13 together surround the first containing space 11.

[0092] In some embodiments, the wall plate 12 is oppositely provided with two along the first direction X, the reinforcing beam 14 is located between the two wall plates 12, the reinforcing beam 14 is arranged at intervals with the wall plate 12, the side beam 13, the reinforcing beam 14, the wall plate 12 and the cover assembly 2 surround the second containing space 15; the battery 100 further comprises a battery management assembly, and the battery management assembly is contained in the second containing space 15.

[0093] The two wall plates 12 can be oppositely arranged at intervals along the first direction X and connected between the two side beams 13. By arranging the reinforcing beam 14 between the two wall plates 12 and arranging the reinforcing beam 14 at intervals with the wall plate 12, the reinforcing beam 14 and the wall plate 12 can form the second containing space 15, and the second containing space 15 is used to contain the components in the battery 100.

[0094] The battery management assembly can include a circuit board electrically connected with the battery monomer 20, and by arranging the battery management assembly in the second containing space 15, the battery management assembly can be protected by the box body 10.

[0095] In some embodiments, the cover assembly 2 comprises a shield plate 23 connected to the first bent portion 122 and the main beam 131.

[0096] The shield plate 23 can be a plate-shaped component with a shielding capability, for protecting the battery cells 20 located in the first accommodating space 11. The shield plate 23 is connected to the first bent portion 122 and the main beam 131, so as to achieve a firm connection between the shield plate 23 and the frame structure 1.

[0097] In some embodiments, the cover assembly 2 further comprises a wall plate 21 and a heat exchange pipe 22, the wall plate 21 is arranged opposite to the shield plate 23 along the thickness direction of the wall plate 21, the heat exchange pipe 22 is located between the wall plate 21 and the shield plate 23 and connected to the wall plate 21, and the wall plate 21 is connected to the edge beam 13.

[0098] The wall plate 21 can be a plate-shaped structure in the cover assembly 2, for covering the first opening 111. The wall plate 21 is connected to the edge beam 13 through the connecting plate 134 of the edge beam 13, so as to achieve a connection on the edge beam 13 and cover the first opening 111. The battery cells 20 located in the first accommodating space are connected to the wall plate 21, and can exchange heat with the wall plate 21.

[0099] By arranging the wall plate 21 and the shield plate 23 opposite to each other along the thickness direction of the wall plate 21, and arranging the shield plate 23 on the side of the wall plate 21 away from the first accommodating space 11, a space can be formed between the shield plate 23 and the wall plate 21 outside the first accommodating space 11, so that the heat exchange pipe 22 and other components can be arranged in the space formed between the shield plate 23 and the wall plate 21, and these components can be protected by the shield plate 23.

[0100] The heat exchange pipe 22 can be a tubular component capable of circulating a heat exchange medium in or out. The inner cavity of the heat exchange pipe 22 can serve as a flow channel for the heat exchange medium, so that the heat exchange pipe 22 can circulate the heat exchange medium in or out. By connecting the heat exchange pipe 22 to the wall plate 21, the heat exchange pipe 22 can be in contact with the wall plate 21, so that the heat exchange medium in the heat exchange pipe 22 can exchange heat with the battery cells 20 in the first accommodating space 11 through the wall of the heat exchange pipe 22 and the wall plate 21.

[0101] In some embodiments, the cover assembly 2 further comprises a buffer structure 24 located between the wall plate 21 and the shield plate 23, and the buffer structure 24 is formed with an accommodating groove 241, and at least part of the heat exchange pipe 22 is located in the accommodating groove 241.

[0102] The buffer structure 24 can be a structure capable of buffering impact, vibration, etc. By arranging the buffer structure 24 between the wall plate 21 and the guard plate 23, the impact, vibration, etc. received by the guard plate 23 can be buffered by the buffer structure 24 before being transmitted to the wall plate 21 and the first containing space 11, which is conducive to reducing the impact, vibration, etc. received by the wall plate 21 and the battery monomer 20 in the first containing space 11.

[0103] Exemplarily, the buffer structure 24 can be made of foam or foamed plastic, so that it can have good absorption effect on impact and vibration. In some embodiments, the buffer structure 24 can be thermoplastic polyurethane foam, which not only enables the buffer structure 24 to absorb vibration and impact, but also enables the buffer structure 24 to maintain its original form when the battery monomer 20 is in thermal runaway.

[0104] In some embodiments, the buffer structure 24 can be formed on the surface of the guard plate 23 facing the wall plate 21 in an integrated foaming manner, which can enable the buffer structure 24 to be connected to the guard plate 23 and facilitate assembly with the guard plate 23.

[0105] The containing groove 241 can be a groove-shaped structure for containing the heat exchange pipe 22. By forming the containing groove 241 on the side of the buffer structure 24 facing the wall plate 21, at least part of the heat exchange pipe 22 can be contained in the containing groove 241 when the buffer structure 24 is installed on the frame structure 1 with the guard plate 23, which reduces the possibility of interference between the heat exchange pipe 22 and the buffer structure 24.

[0106] Exemplarily, the buffer structure 24 is connected to the guard plate 23, and the buffer structure 24 is arranged apart from the wall plate 21.

[0107] The buffer structure 24 connected to the guard plate 23 can mean that the buffer structure 24 is directly connected to the guard plate 23. Exemplarily, the buffer structure 24 can be connected to the surface of the guard plate 23 facing the wall plate 21 by adhesive, connecting bolts, etc., or can be directly formed on the surface of the guard plate 23 facing the wall plate 21 by foaming process.

[0108] Since the wall plate 21 can exchange heat with the battery monomer 20, the temperature of the wall plate 21 will change with the temperature change of the battery monomer 20. By arranging the buffer structure 24 apart from the wall plate 21, the buffer structure 24 is less likely to contact the wall plate 21, and the heat on the wall plate 21 is less likely to be transmitted to the buffer structure 24, which is conducive to maintaining the original form of the buffer structure 24.

[0109] In some embodiments, the cover assembly 2 further comprises a heat-conducting adhesive layer 25, and the heat exchange pipe 22 is connected to the wall plate 21 through the heat-conducting adhesive layer 25.

[0110] The heat-conducting adhesive layer 25 can be an adhesive layer structure capable of good heat conduction. The heat exchange pipe 22 is bonded to the wall plate 21 through the heat-conducting adhesive layer 25, not only making the heat exchange pipe 22 conveniently connected to the wall plate 21, but also making the heat exchange pipe 22 and the wall plate 21 have good heat conduction.

[0111] In some embodiments, referring to FIGS. 6 and 7, the wall plate 12 further comprises a third bending portion 123 connected to the main body portion 121, the third bending portion 123 being bent away from the first containing space 11 relative to the main body portion 121 and disposed opposite to the first bending portion 122.

[0112] The third bending portion 123 can be a part of the wall plate 12, which is bent away from the first containing space 11 relative to the main body portion 121, and can provide a connection position to connect with other parts in the box body 10. Since the wall plate 12 has a relatively thin thickness, it can reduce the mass and material of the frame structure 1, and is conducive to the lightweight of the battery 100.

[0113] In some embodiments, the wall plate 12 further comprises a second connecting member 124 disposed on the third bending portion 123.

[0114] The second connecting member 124 can be a component for connecting with other parts in the box body 10. By disposing the second connecting member 124 on the third bending portion 123, other parts in the box body 10 can be connected with the wall plate 12 through the second connecting member 124, so that other parts in the box body 10 can be connected with the frame structure 1.

[0115] For example, the second connecting member 124 can be a nut connected to the third bending portion 123, so that other parts in the box body 10 can be connected with the third bending portion 123 through a connecting bolt matched with the nut.

[0116] In some embodiments, the box body 10 further comprises a cover plate disposed opposite to the cover assembly 2 along the thickness direction of the cover assembly 2, the cover plate covering the first opening 111.

[0117] The cover plate can be a component for covering the first opening 111 of the first containing space 11, which is used to protect the battery monomer 20 in the first containing space 11. For example, the cover plate can cover two opposite first openings 111 of the first containing space 11 respectively with the cover assembly 2.

[0118] Some embodiments of the present application also provide a battery 100, comprising a box 10, the box 10 comprising a frame structure 1 and a cover assembly 2, the frame structure 1 forming a first accommodating space 11 for accommodating a battery cell 20, the first accommodating space 11 having a first opening 111; the frame structure 1 comprising a wall plate 12, the wall plate 12 comprising a main body portion 121 and a first bending portion 122 connected to each other, the first bending portion 122 being bent away from a side of the main body portion 121 facing away from the first accommodating space 11; the cover assembly 2 being connected to the first bending portion 122 and covering the first opening 111.

[0119] In the box 10, the wall plate 12 comprises the main body portion 121 and the first bending portion 122 connected to each other, the first bending portion 122 being bent away from a side of the main body portion 121 facing away from the first accommodating space 11 to provide a connecting position for the cover assembly 2, so that the cover assembly 2 is connected to the frame structure 1 and covers the first opening 111 by being connected to the first bending portion 122. Thus, the frame structure 1 can connect the cover assembly 2 through the wall plate 12, and compared with the hollow profile structure, the thickness of the wall plate 12 is thinner, which reduces the mass and material of the frame structure 1, and is beneficial to the lightweight of the battery 100; in addition, the frame structure 1 is only partially the wall plate 12, which not only can meet the crashworthiness performance of the battery 100, but also can meet the assembly requirement of the battery 100, and the structure design is more reasonable.

[0120] Some embodiments of the present application also provide an electric device, comprising the battery 100 provided in the above technical solutions, the battery 100 being used for providing electric energy.

[0121] The electric device can be any of the devices or systems using the battery 100.

[0122] According to some embodiments of the present application, the present application provides a battery 100, the battery 100 comprising a battery cell 20 and a box body 10, the box body 10 comprising a frame structure 1 and a cover assembly 2, the frame structure 1 comprising two side beams 13 oppositely arranged along a second direction Y, two wall plates 12 oppositely arranged along a first direction X, and a plurality of reinforcing beams 14 arranged at intervals along the first direction X, the wall plates 12 being connected between the two side beams 13, the plurality of reinforcing beams 14 being located between the two wall plates 12, the reinforcing beams 14 and the wall plates 12 forming a second accommodating space 15 accommodating a battery management assembly therebetween, and the reinforcing beams 14 and the side beams 13 forming a first accommodating space 11 for accommodating the battery cell 20 with a first opening 111. The first bending portion 122 and the second bending portion 1322 in the wall plate 12 are both connected to the main body portion 121, and the first bending portion 122 and the third bending portion 123 are bent away from the first accommodating space 11 relative to the main body portion 121 and oppositely arranged. The main beam 131 in the side beam 13 is provided with a first cavity 1311, and the second bending portion 1322 in the connecting wall 132 is bent away from the first accommodating space 11 relative to the surrounding portion 1321.

[0123] In the above structure, the wall plate 12 comprises the main body portion 121 and the first bending portion 122 connected to each other, and the first bending portion 122 is bent away from the first accommodating space 11 relative to the main body portion 121 to provide a connecting position for the cover assembly 2, so that the cover assembly 2 is connected to the frame structure 1 and covers the first opening 111 by being connected to the first bending portion 122. Thus, the frame structure 1 can not only connect the cover assembly 2 through the wall plate 12, but also has a thinner thickness of the wall plate 12 compared to the hollow profile structure, thereby reducing the mass and material of the frame structure 1 and facilitating the lightweight of the battery 100. In addition, the frame structure 1 is only partially the wall plate 12, which not only meets the crashworthiness of the battery 100, but also meets the assembly requirements of the battery 100, and the structural design is more reasonable.

[0124] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, comprising: a battery cell; a case comprising a frame structure and a cover assembly, the frame structure forms a first receiving space for accommodating the battery cell, the first receiving space has a first opening; a part of the frame structure is a wall plate, the wall plate comprises a main body portion and a first bent portion connected to each other, the first bent portion is bent away from a side of the main body portion facing the first receiving space; the cover assembly is connected to the first bent portion and covers the first opening.

2. The battery of claim 1, wherein, The frame structure further comprises a side beam connected to the wall plate, the side beam comprises a main beam and a connecting wall connected to each other, at least a part of the connecting wall is bent away from a side of the main beam facing the first receiving space.

3. The battery of claim 2, wherein, The connecting wall comprises a surrounding portion and a second bent portion connected to each other, the surrounding portion is connected between the second bent portion and the main beam, the second bent portion is bent away from a side of the surrounding portion facing the first receiving space.

4. The battery of claim 3, wherein, The side beam further comprises a first connector provided on the second bent portion.

5. The battery of any one of claims 2-4, wherein, The side beam further comprises a connecting plate connected to the main beam, the connecting plate extends into the first receiving space, and the cover assembly is connected to the connecting plate.

6. The battery of any one of claims 2-5, wherein, The main beam is provided with a first cavity.

7. The battery of any one of claims 2-6, wherein, The frame structure further comprises a plurality of reinforcing beams spaced apart along a first direction, the side beam is oppositely provided with two along a second direction, the plurality of reinforcing beams are connected between the two side beams, and the cover assembly, the reinforcing beams and the side beams surround the first receiving space.

8. The battery of claim 7, wherein, The wall plate is oppositely provided with two along the first direction, the reinforcing beams are located between the two wall plates, the reinforcing beams are spaced apart from the wall plates, and the side beams, the reinforcing beams, the wall plates and the cover assembly surround a second receiving space. The battery further comprises a battery management assembly accommodated in the second receiving space.

9. The battery of any one of claims 2-8, wherein, The cover assembly comprises a protective plate connected to the first bent portion and the main beam.

10. The battery of claim 9, wherein, The cover assembly further comprises a wall plate and a heat exchange pipe, the wall plate is oppositely provided with the protective plate along a thickness direction of the wall plate, the heat exchange pipe is located between the wall plate and the protective plate and connected to the wall plate, and the wall plate is connected to the side beam.

11. The battery of claim 10, wherein, The cover assembly further comprises a buffer structure located between the wall plate and the protective plate, the buffer structure is formed with a receiving groove, and at least a part of the heat exchange pipe is located in the receiving groove.

12. The battery of claim 11, wherein, The cover assembly further comprises a heat-conducting adhesive layer, and the heat exchange pipe is connected to the wall plate through the heat-conducting adhesive layer.

13. The battery of any one of claims 1 to 12, wherein, The wall plate further comprises a third bent portion connected to the main body portion, the third bent portion is bent away from a side of the main body portion facing the first receiving space and oppositely provided with the first bent portion.

14. The battery of claim 13, wherein, The wall plate further comprises a second connector provided on the third bent portion.

15. The battery of any one of claims 1 to 12, wherein, The case further comprises a cover plate oppositely provided with the cover assembly along a thickness direction of the cover assembly, and the cover plate covers the first opening. 16.A case of a battery, comprising: A frame structure forms a first accommodation space for accommodating a battery cell, the first accommodation space having a first opening; A portion of the frame structure is a wall plate including a main body portion and a first bent portion connected to each other, the first bent portion bent toward a side away from the first accommodation space with respect to the main body portion; A cover assembly connected to the first bent portion and covering the first opening.

17. An electric device comprising the battery as claimed in any one of claims 1 to 15, the battery being used to provide electric energy.

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