Shell assembly, battery and electric device

Abstract

The utility model belongs to the technical field of batteries, and provides a shell assembly, a battery and a power utilization device, the shell assembly is applied to the battery and is used for accommodating a battery monomer, and the shell assembly comprises a shell, an end cover and a locking assembly; wherein the shell is provided with a containing space, the shell bends and extends around a preset axis to form the containing space in a surrounding mode, and a side notch is formed in the side portion of the shell; the end cover is movably connected to the shell and is arranged at the side notch in a blocking manner; the locking assembly is connected between the shell and the end cover, so that the end cover is locked on the shell. The utility model aims to improve the energy density of the battery.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a housing assembly, a battery, and an electrical device. Background Art

[0002] A battery refers to a modular unit formed by combining multiple battery cells together. A battery generally includes a housing, battery cells, etc. Multiple battery cells are connected in series and parallel and arranged in a limited accommodation space of the housing. The accommodation space formed inside the housing of the battery has a direct impact on the energy density. When designing a battery, it is necessary to fully consider the utilization efficiency of the housing space, make full use of the available space as much as possible, and ensure that as many battery cells as possible are accommodated within a limited volume to maximize the energy density.

[0003] In the related art, the space utilization rate of the housing structure of the battery is poor, which is not conducive to improving the energy density of the battery. Summary of the Utility Model

[0004] The purpose of the present application is to provide a housing assembly, a battery, and an electrical device, aiming to solve the technical problem that the unreasonable design of the housing structure of the battery affects the energy density of the battery.

[0005] In a first aspect, the present application provides a housing assembly, which is applied to a battery and used to accommodate battery cells. The housing assembly includes:

[0006] A housing having an accommodation space. The housing bends and extends around a preset axis to enclose and form the accommodation space, and a side notch is formed on the side of the housing.

[0007] An end cover movably connected to the housing and blocking the side notch.

[0008] A locking assembly connected between the housing and the end cover to lock the end cover to the housing.

[0009] In this example, in the housing assembly for accommodating battery cells, a side notch is provided on the housing, and an end cover is provided and connected to the side notch, thereby reducing the situation of multiple end covers occupying space. When the external occupied space of the housing assembly is certain, the number of end covers is reduced, and then the area of the accommodation space in the direction perpendicular to the preset direction is increased, so as to increase the size of the accommodation space, improve the utilization rate of the accommodation space of the housing assembly, and enable as many battery cells as possible to be accommodated in the accommodation space, which is thus conducive to improving the energy density of the battery.

[0010] In one embodiment, folding ears are respectively formed on two edges of the housing located at the side notch and extend towards the center of the side notch. The two folding ears are respectively connected to the end cover through the locking assembly.

[0011] In this example, by setting the folding ear part, the folding ear part extends from two edges of the housing located at the side notch towards the center of the side notch, so as to form an assembly surface for fitting and connecting with the end cover on the folding ear part, thereby increasing the connection area between the housing and the end cover and facilitating the connection of the locking component to the housing through the folding ear part.

[0012] In one embodiment, the locking component is threadedly connected to the housing and the end cover respectively.

[0013] In this example, the locking component is connected to the housing and the end cover by means of threaded connection, and the connection is more firm and reliable. Moreover, the threaded connection method is convenient for installation and disassembly, making the assembly and disassembly of the housing and the end cover more convenient and conducive to improving work efficiency.

[0014] In one embodiment, the housing includes a first side wall, a second side wall and a third side wall. The first side wall, the second side wall and the third side wall are sequentially connected and arranged around the preset axis. A side notch is formed between the first side wall and the third side wall; the end cover is connected to the first side wall and the third side wall respectively through the locking component.

[0015] In this example, the housing is formed by sequentially connecting and enclosing the first side wall, the second side wall and the third side wall. The second side wall can be arranged at an angle with respect to the first side wall and the third side wall, so as to make the housing form a preset shape to match the battery cell; the side notch is directly formed between the side edges of the first side wall and the third side wall, making the housing easy to manufacture and process.

[0016] In one embodiment, the first side wall, the second side wall and the third side wall are all planar. Bends are formed at the connection positions between the second side wall and the first side wall, and between the second side wall and the third side wall. The bending angle ranges from 90° to 100°.

[0017] In this example, the first side wall, the second side wall and the third side wall are integrally formed. Bends are respectively formed at the positions where the second side wall is connected to the first side wall and the third side wall. The bending angle is controlled within the range of 90° to 100°. When the battery cell is installed, it is not easy to interfere with the bending positions, and a reasonable gap is maintained, reducing space waste and improving the grouping and assembly efficiency of the battery cell.

[0018] In one embodiment, the bending angle is 90° - 95°.

[0019] In this example, the bending angle is controlled within the range of 90° - 95°, so that when the battery cell is installed, it is not easy to interfere with the bending position, and a reasonable gap is maintained, reducing space waste and improving the grouping and assembly efficiency of the battery cell.

[0020] In one embodiment, the thickness of the second side wall is greater than the thickness of the first side wall and the third side wall.

[0021] In this example, increasing the thickness of the second side wall can enhance the overall strength and stiffness of the housing, improve the anti-deformation ability of the housing, and moreover, increasing the thickness of the second side wall can occupy as little accommodation space as possible, reducing the impact on the energy density of the battery.

[0022] In one embodiment, a rib structure is formed on the wall surface of the second side wall facing away from the accommodation space.

[0023] In this example, by setting the rib structure, the stiffness and strength of the second side wall can be enhanced, thereby further enhancing the stiffness and strength of the housing and improving the support performance of the housing.

[0024] In one embodiment, a channel structure is formed on the housing.

[0025] In this example, by setting the channel structure, it is convenient to cool the battery cell when the battery is working, so that the temperature of the battery cell is maintained at a relatively low level, making the working efficiency of the battery cell stable and reducing the risk of thermal runaway of the battery cell.

[0026] In one embodiment, the channel structure is formed inside the shell wall of the housing.

[0027] In this example, by opening the channel structure inside the shell wall of the housing, the cooling medium directly enters the channel structure, and the cooling medium cools the housing from the inside out, enabling the cooling medium to form a larger contact area with the housing and improving the cooling efficiency.

[0028] In one embodiment, the channel structure is opened on the inner wall surface of the housing; the outer shell assembly further includes a tube structure, and the tube structure is accommodated in the channel structure.

[0029] In this example, the channel structure is a groove structure formed on the inner wall surface of the housing, making the preparation of the housing and the channel structure more convenient, facilitating the processing of the groove structure on the housing and reducing the production cost; by setting the tube structure, the tube structure can be accommodated in the groove structure, and the cooling medium enters the tube structure, thereby achieving the purpose of cooling the housing and the battery cell. The overall structure of the outer shell assembly is more convenient for processing and installation, and is convenient for disassembly and installation when the tube structure is damaged, and is more convenient for maintenance.

[0030] In one embodiment, the channel structure includes a plurality of sub-channels, and each of the sub-channels extends linearly.

[0031] In this example, the channel structure includes a plurality of sub-channels so that the channel structure forms a larger coverage area on the housing, increasing the heat absorption and dissipation areas, and thus improving the cooling efficiency.

[0032] In one embodiment, the channel structure has a channel inlet and a channel outlet, and both the channel inlet and the channel outlet extend to the side notch respectively.

[0033] In this example, the positions of the channel inlet and the channel outlet are set such that the channel structure is more convenient for processing and connecting to an external pipe structure; in addition, the cooling substance can flow through the entire shell wall of the housing from one side or one folding ear of the side notch and then return to the other side edge or the other folding ear of the side notch, which can increase the heat dissipation area of the channel structure on the housing and improve the cooling efficiency of the housing and the battery cell.

[0034] In one embodiment, an insulating layer is formed on the inner wall surface of the housing facing the accommodation space.

[0035] In this example, the insulating layer is connected to the inner wall surface of the housing and is used to insulate between the housing and the battery cell, reducing the risk of short circuit between the battery cell and the housing and improving the reliability of the battery.

[0036] In a second aspect, the present application provides a battery, which includes a battery cell and the housing assembly in the above embodiment, and the battery cell is accommodated in the accommodation space.

[0037] In a third aspect, the present application provides an electrical device, which includes the housing assembly or the battery in the above embodiment, and the battery is used to provide electrical energy.

[0038] The above description is only an overview of the technical solution of the present application. In order 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 describes the specific embodiments of the present application. Description of the Drawings

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application or the description of the prior art. Obviously, the following described drawings 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.

[0040] Figure 1 Structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0041] Figure 2 Exploded structural schematic diagram of a battery provided by some embodiments of the present application;

[0042] Figure 3 Structural schematic diagram of a battery or battery module provided by some embodiments of the present application;

[0043] Figure 4 Structural schematic diagram of a housing assembly provided by some embodiments of the present application;

[0044] Figure 5 Structural schematic diagram of the connection between a locking component and an end cover in a housing assembly provided by some embodiments of the present application;

[0045] Figure 6 For Figure 5 A - A view of;

[0046] Figure 7 Structural schematic of a housing provided by some embodiments of the present application Figure 1 ;

[0047] Figure 8 For Figure 7 Isometric view of;

[0048] Figure 9 Structural schematic diagram of an end cover provided by some embodiments of the present application;

[0049] Figure 10 Structural schematic of a housing provided by some embodiments of the present application Figure 2 ;

[0050] Figure 11 Structural schematic of a housing provided by some embodiments of the present application Figure 3 ;

[0051] Figure 12 For Figure 11 Assembly schematic diagram of the pipe body structure and the housing in;

[0052] Figure 13 Structural schematic of a housing provided by some embodiments of the present application Figure 4 ;

[0053] Figure 14 For Figure 13 Assembly schematic diagram of the pipe body structure and the housing in;

[0054] Figure 15 Structural schematic of a housing provided by some embodiments of the present application Figure 5 .

[0055] Explanation of reference numerals:

[0056] 1000, Vehicle; 100, Battery; 10, Box; 11, First Part; 12, Second Part; 20, Battery Module; 21, Housing Assembly; 211, Housing; 2111, First Side Wall; 2112, Second Side Wall; 2113, Third Side Wall; 2114, Side Notch; 2115, Folded Ear; 2116, Bend; 2117, Rib Structure; 2118, Channel Structure; 21181, Channel Entrance; 21182, Channel Exit; 2119, Pipe Structure; 2120, Insulation Layer; 212, Accommodating Space; 213, End Cap; 2131, Hollow Structure; 214, Locking Assembly; 22, Battery Cell; 200, Controller; 300, Motor; a, Bend Angle. Detailed Embodiment

[0057] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0058] 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.

[0059] 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. In the description of the embodiments of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0060] Referring to "embodiments" herein means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0061] In the description of the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0062] 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).

[0063] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is 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. Therefore, it should not be construed as a limitation on the embodiments of the present application.

[0064] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", 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 communication inside 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 situations.

[0065] A battery refers to a modular unit formed by combining multiple battery cells together. A battery usually includes a housing, battery cells, etc. Multiple battery cells are connected in series and parallel and arranged in the limited accommodation space of the housing. The accommodation space formed inside the housing of the battery has a direct impact on the energy density. When designing a battery, it is necessary to fully consider the utilization efficiency of the housing space, make the best use of the available space as much as possible, and ensure that as many battery cells as possible are accommodated within a limited volume to maximize the energy density.

[0066] In the related art, the space utilization rate of the battery housing structure design is poor, which is not conducive to improving the energy density of the battery. For example, the battery adopts a connection method of a side shell and two end caps. The two end caps are arranged opposite to each other, and the side shell is connected between the two end caps. The two end caps and the side shell jointly enclose a containing space for containing battery cells. The thickness of the end caps is relatively large, thus occupying a large space. When the outer dimensions of the housing are the same, the containing space inside the housing is relatively reduced, which is not conducive to improving the energy density of the battery.

[0067] Therefore, the present application provides a housing assembly, which can improve the utilization rate of the containing space of the housing, and thus is conducive to improving the energy density of the battery.

[0068] Specifically, referring to Figure 2 and Figure 3 As shown, an embodiment of the present application provides a battery 100. The battery 100 may include a battery module 20. The battery 100 disclosed in the embodiments of the present application can be used in an electrical device using the battery 100 as a power source or various energy storage systems using the battery 100 as an energy storage element. The electrical device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, and the like. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric vehicle toy, an electric ship toy, an electric aircraft toy, and the like. The spacecraft may include an airplane, a rocket, a space shuttle, a spaceship, and the like.

[0069] For the convenience of description in the following embodiments, a vehicle 1000, which is an electrical device in an embodiment of the present application, is taken as an example for description.

[0070] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the vehicle 1000 provided in some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle, an extended-range vehicle, or the like. The vehicle 1000 is internally provided with a battery 100, and the battery 100 may be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for the power supply of the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation, and driving of the vehicle 1000.

[0071] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0072] Please refer to Figure 2 , Figure 2 which is an exploded view of the battery 100 provided for some embodiments of the present application. The battery 100 includes a box body 10 and a battery module 20. The battery module 20 is accommodated in the box body 10. The battery module 20 includes battery cells 22 and a housing assembly 21. Alternatively, the battery 100 includes a box body 10 and battery cells 22, and the battery cells 22 are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space for the battery module 20 or the battery cells 22, and the box body 10 can adopt various structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12. The first part 11 and the second part 12 are covered with each other, and the first part 11 and the second part 12 jointly define an accommodation space for accommodating the battery module 20 or the battery cells 22. The second part 12 may be a hollow structure with an open end, and the first part 11 may be a plate-like structure. The first part 11 covers the open side of the second part 12 so that the first part 11 and the second part 12 jointly define an accommodation space. The first part 11 and the second part 12 may also both be hollow structures with an open side, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0073] The battery 100 may be in the form that multiple battery cells 22 are first connected in series, parallel or in a hybrid connection to form a battery module. One battery module is accommodated in one housing assembly 21, and multiple battery modules are then connected in series, parallel or in a hybrid connection to form an integral body, for example, the battery module 20. The multiple housing assemblies 21 are arranged in an array and accommodated in the box body 10. The battery 100 may further include other structures. For example, the battery 100 may further include a busbar component for realizing electrical connection between multiple battery modules 20 or between battery cells 22.

[0074] The battery module 20 includes a housing assembly 21 and battery cells 22. The battery cell 22 refers to the smallest unit that makes up the battery 100. Among them, each battery cell 22 may be a secondary battery 100 or a primary battery 100; it may also be a lithium-sulfur battery 100, a sodium-ion battery 100 or a magnesium-ion battery 100, but not limited thereto. The battery cell 22 may be in the shape of a cylinder, a flat body, a cuboid or other shapes.

[0075] The housing assembly 21 is used to accommodate the battery cells 22 and wrap and support the battery cells 22 externally. According to some embodiments of the present application, refer to Figures 4 - 9As shown in the figure. An embodiment of the present application provides a housing assembly 21, which is applied to a battery 100 or a battery module 20 and is used to accommodate battery cells 22. The housing assembly 21 includes a housing 211, an end cover 213, and a locking assembly 214. Among them, the housing 211 has an accommodating space 212. The housing 211 bends and extends around a preset axis to enclose the accommodating space 212. The housing 211 forms a side notch 2114 on its side. The end cover 213 is movably connected to the housing 211 and blocks the side notch 2114. The locking assembly 214 is connected between the housing 211 and the end cover 213 to lock the end cover 213 to the housing 211.

[0076] Specifically, in combination with Figure 4 , Figure 7 and Figure 8 As shown, the housing 211 has an accommodating space 212, which is used to accommodate battery cells 22. The accommodating space 212 can be an open space with an open mouth, so that the battery cells 22 can enter the accommodating space 212 through the open mouth.

[0077] Since the housing 211 needs to laterally surround and circumferentially wrap the battery cells 22 in the circumferential direction of the battery cells 22, the housing 211 bends and extends around a preset axis to form an annular curved surface shape, so that the housing 211 can wrap around the circumferential direction of the battery cells 22. The preset axis can be understood as the virtual axis of the battery cells 22 in the height direction or the virtual axis of the battery cells 22 in the longitudinal axis direction. The housing 211 can form two open mouths at both ends along the preset axis, so that the battery cells 22 can enter the accommodating space 212 through the open mouths.

[0078] Among them, the bending and extending includes one of extending along an arc curve and bending and extending along a broken line. Among them, the broken line includes a plurality of straight line segments connected in sequence at an angle. The broken line also includes a plurality of straight line segments and arc curve segments connected in sequence. Specifically, in a plane perpendicular to the preset axis, the housing 211 can bend and extend to form various shapes. For example, a circle, an ellipse, a polygon, or a combined figure formed by a combination of straight lines and curves, etc. Among them, the polygon can include a triangle, a quadrilateral, etc. Among the quadrilaterals, there can be a square, a rectangle, etc. That is to say, the housing 211 bends and extends around the preset axis to enclose an annular wall structure with a square or rectangular cross-sectional outer contour shape.

[0079] The side part of the housing 211 refers to the shell wall of the housing 211 on the side along the preset axis. A side notch 2114 is formed on the shell wall of this side. The side notch 2114 can be understood as a notch opened on the housing 211. This notch is located on one side of the housing 211 along the preset axis, so it can be understood as the side notch 2114. The side notch 2114 can be opened after the housing 211 is prepared. Or, the side notch 2114 can also be formed by arranging intervals between adjacent shell walls of the housing 211 during the preparation process of the housing 211. It can also be understood that when the housing 211 bends and extends around the preset axis to enclose the accommodation space 212, an interval opening is formed with an annular setting angle less than 360°.

[0080] The end cap 213 is movably connected to the housing 211. The ways of movable connection can include detachable connection. For example, the end cap 213 can be abutted against the housing 211, or the end cap 213 can be inserted into the housing 211, etc., so that the end cap 213 can be separated from and connected to the housing 211. After the end cap 213 is connected to the housing 211, the end cap 213 blocks the side notch 2114 to close the side notch 2114, so that the housing 211 and the end cap 213 together form an annular support structure that can laterally wrap and surround the battery cell 22.

[0081] The end cap 213 can adopt a plate-like structure. The thickness of the end cap 213 is greater than the thickness of the housing 211. The end cap 213 is connected to the housing 211 to increase the stiffness and strength of the housing 211, so that the housing 211 is not easily deformed by extrusion. The end cap 213, as a structural support part of the battery 100, provides mechanical support for the battery cell 22 and protects the battery cell 22 from the influence of external impact and vibration, which helps to improve the safety and stability of the battery cell 22. The connection between the end cap 213 and the housing 211 is used to encapsulate the battery cell 22, which can firmly fix the battery cell 22 inside the module, helps to reduce the movement or vibration of the battery cell 22, and reduces the potential unreliable risk caused by mobility; in addition to the above functions, conductive sheets, connectors, etc. are usually installed on the end cap 213 to realize the electrical connection between the battery cells 22 and the electrical connection between adjacent batteries 100, so that the battery cells 22 can work together to form an integral battery 100. A hollow structure 2131 can be formed inside the end cap 213 to reduce the weight of the end cap 213 while meeting the strength and stiffness of the end cap 213, and thus contribute to the lightweight of the housing assembly 21 and the battery 100.

[0082] The locking component 214 is used to fix the relative position between the end cover 213 and the housing 211, so that it is not easy for the end cover 213 to separate from the housing 211 after the end cover 213 is connected to the housing 211. The locking component 214 is respectively connected to the housing 211 and the end cover 213, so as to lock the end cover 213 on the housing 211. The locking method of the locking component 214 may include methods such as pin insertion, screw locking, elastic clamping, etc. For example, the locking component 214 adopts a pin structure, and locking holes are opened at the connection positions of the end cover 213 and the housing 211. The central axis direction of the locking hole is set at an angle (such as perpendicular) to the separation direction of the end cover 213 relative to the housing 211. The pin structure is inserted into the locking hole, so as to play a limiting role between the end cover 213 and the housing 211.

[0083] Among them, the end cover 213 and the housing 211 are connected through the locking component 214, so that the end cover 213 does not need to be welded to the housing 211. During welding, the flux or debris attached to the housing 211 and the end plate are likely to cause the short circuit of the battery cell 22. Using the locking component 214 to lock and fix the end cover 213 and the housing 211 reduces the risk of short circuit of the battery 100.

[0084] In this example, in the housing assembly 21 for accommodating the battery cell 22, a side notch 2114 is provided on the housing 211, and an end cover 213 is provided to be connected to the side notch 2114, thereby reducing the situation where multiple end covers 213 occupy space. When the external occupied space of the housing assembly 21 is certain, reducing the number of end covers 213, and then increasing the area of the accommodating space in the direction perpendicular to the preset direction, thereby increasing the size of the accommodating space, improving the utilization rate of the accommodating space of the housing assembly 21, so that as many battery cells 22 as possible can be accommodated in the accommodating space, which is beneficial to improving the energy density of the battery 100.

[0085] In some examples, referring to Figures 5 - 8 As shown, on the two edges of the housing 211 located at the side notch 2114, folding ears 2115 are respectively formed extending towards the center of the side notch 2114. The two folding ears 2115 are respectively connected to the end cover 213 through the locking component 214.

[0086] Specifically, the two edges of the housing 211 located at the side notch 2114 can also be understood as the two relatively arranged groove walls of the side notch 2114. Since the housing 211 is bent and extended around the preset axis to form a ring with the side notch 2114, it can be known that the side notch 2114 is formed between the two extended ends of the housing 211. Therefore, it can be known that the two edges of the housing 211 located at the side notch 2114 can also refer to the two extended ends of the housing 211, and folding ears 2115 are respectively formed at the two extended ends.

[0087] The folding ear part 2115 is formed or connected to the housing 211. The folding ear part 2115 can be a part of the housing 211, integrally formed with the housing 211. The folding ear part 2115 can also be an independent component, connected to the housing 211. The folding ear part 2115 extends from the edge of the side notch 2114 of the housing 211 towards the center of the side notch 2114. Therefore, the folding ear part 2115 can be plate-shaped, and the plate surface of the folding ear part 2115 is the assembly surface for fitting and connecting with the end cover 213. When the connecting surface of the end cover 213 is a plane, the assembly surfaces of the two folding ear parts 2115 need to be coplanar. When the connecting surface of the end cover 213 is a stepped surface, the plate surfaces of the two folding ear parts 2115 need to be offset so that the connecting surface of the end cover 213 can be in fitting connection with the assembly surfaces of the two folding ear parts 2115.

[0088] The locking assembly 214 is connected between the folding ear part 2115 and the end cover 213. Since there are two folding ear parts 2115, each folding ear part 2115 is connected to the end cover 213 through the locking assembly 214. Therefore, the locking assembly 214 can include at least two locking structures, and each folding ear part 2115 and the end cover 213 are locked and fixed through at least one locking structure.

[0089] In this example, by providing the folding ear part 2115, the folding ear part 2115 extends from the two edges of the housing 211 located at the side notch 2114 towards the center of the side notch 2114, so that an assembly surface for fitting and connecting with the end cover 213 is formed on the folding ear part 2115, increasing the connection area between the housing 211 and the end cover 213, and facilitating the connection of the locking assembly 214 to the housing 211 through the folding ear part 2115.

[0090] In some examples, as shown in Figures 4 - 6 the locking assembly 214 is respectively threadedly connected to the housing 211 and the end cover 213.

[0091] Specifically, threaded structures are formed on the locking assembly 214, the housing 211, and the end cover 213. The threaded structure on the locking assembly 214 can be respectively matched and connected with the threaded structures on the housing 211 and the end cover 213 to lock and limit the housing 211 and the end cover 213. For example, the locking assembly 214 includes a bolt with external threads. Threaded holes are respectively opened on the housing 211 and the end cover 213, and internal threads are formed on the hole walls. The bolt is screwed into the threaded holes of the housing 211 and the end cover 213, so as to achieve the purpose of connecting and limiting the housing 211 and the end cover 213. Another example is that when the locking assembly 214 includes the above bolt, it also includes a nut. The end of the bolt can extend out of the threaded holes of the housing 211 and the end cover 213 to be connected with the nut, thereby achieving the purpose of limiting the housing 211 and the end cover 213.

[0092] When there is a folding ear part 2115 connected to the housing 211, the threaded holes on the housing 211 can be opened on the folding ear part 2115. At least one threaded hole is opened on each of the two folding ear parts 2115. Correspondingly, matching threaded holes are opened at the corresponding positions on the end cover 213. Bolts are respectively screwed into the threaded holes of the end cover 213 and the threaded holes of the folding ear part 2115 to achieve the purpose of connecting and fixing the end cover 213 and the folding ear part 2115.

[0093] In this example, the locking component 214 is connected to the housing 211 (or the folding ear part 2115) and the end cover 213 by means of threaded connection. The connection is more firm and reliable. Moreover, the threaded connection method is convenient for installation and disassembly, making the assembly and disassembly of the housing 211 and the end cover 213 more convenient and conducive to improving work efficiency.

[0094] In some examples, referring to Figure 7 and Figure 8 as shown, the housing 211 includes a first side wall 2111, a second side wall 2112 and a third side wall 2113. The first side wall 2111, the second side wall 2112 and the third side wall 2113 are sequentially connected and arranged around a preset axis, and a side notch 2114 is formed between the first side wall 2111 and the third side wall 2113; the end cover 213 is connected to the first side wall 2111 and the end cover 213 is connected to the third side wall 2113 by means of the locking component 214.

[0095] Specifically, the first side wall 2111, the second side wall 2112 and the third side wall 2113 can be planar or curved. Taking the first side wall 2111, the second side wall 2112 and the third side wall 2113 as planar as an example, then, the first side wall 2111, the second side wall 2112 and the third side wall 2113 can be understood as plate structures. The two side edges of the second side wall 2112 are respectively connected (or butted) to the edge of the first side wall 2111 and the edge of the third side wall 2113. A side notch 2114 is formed by spacing between the side edge of the first side wall 2111 far from the second side wall 2112 and the side edge of the third side wall 2113 far from the second side wall 2112.

[0096] The housing 211 includes three side walls, namely a first side wall 2111, a second side wall 2112 and a third side wall 2113, and the three side walls can be integrally formed; a side notch 2114 is formed between the first side wall 2111 and the third side wall 2113. It can be understood that the exterior of the outer shell assembly 21 is in the shape of a cylinder with a quadrilateral cross-section. When the first side wall 2111 is parallel to the third side wall 2113, the second side wall 2112 is perpendicular to both the first side wall 2111 and the third side wall 2113, and the end cover 213 is perpendicular to the first side wall 2111 or the third side wall 2113, the exterior of the outer shell assembly 21 can be in the shape of a cube. The end cover 213 is connected to the side notch 2114, and the end cover 213 is respectively connected to the first side wall 2111 and the third side wall 2113, and is fixedly connected through the locking assembly 214; an accommodation space 212 is formed inside the outer shell assembly 21, and the battery cell 22 is accommodated in the accommodation space 212, and the outer shell assembly 21 wraps, surrounds and supports the battery cell 22 in its circumferential direction.

[0097] In the case where there are folding ears 2115, one folding ear 2115 is connected to the side edge of the first side wall 2111 away from the second side wall 2112, and the folding ear 2115 extends in the direction towards the third side wall 2113 to extend into a plate shape at an angle with the first side wall 2111; the other folding ear 2115 is connected to the side edge of the third side wall 2113 away from the second side wall 2112, and the folding ear 2115 extends in the direction towards the first side wall 2111 to extend into a plate shape at an angle with the third side wall 2113, and the two folding ears 2115 can be arranged in parallel.

[0098] In this example, the housing 211 is formed by sequentially connecting and enclosing the first side wall 2111, the second side wall 2112 and the third side wall 2113. The second side wall 2112 can be arranged at an angle with the first side wall 2111 and the third side wall 2113 so that the housing 211 forms a preset shape to match the battery cell 22; the side notch 2114 is directly formed between the side edges of the first side wall 2111 and the third side wall 2113, making the housing 211 easy to manufacture and process.

[0099] In some examples, referring to Figure 7 As shown, the first side wall 2111, the second side wall 2112 and the third side wall 2113 are all planar, and bends 2116 are formed at the connection positions of the second side wall 2112 with the first side wall 2111 and the connection positions of the second side wall 2112 with the third side wall 2113, and the bending angle a ranges from 90° to 100°.

[0100] Specifically, the first side wall 2111 and the second side wall 2112 are integrally formed, and an included angle is provided between the first side wall 2111 and the second side wall 2112. Therefore, it can be known that a bend 2116 is formed at the transition position between the side edge of the first side wall 2111 and the side edge of the second side plate. The bending angle a can be 90°, making the first side wall 2111 perpendicular to the second side wall 2112. The bending angle a can also be greater than 90°, thereby reducing the probability of interference between the battery cell 22 and the position of the bend 2116 caused by processing errors when the battery cell 22 is assembled with the housing assembly 21. However, in order to reduce the space waste between the position of the bend 2116 and the battery cell 22, the bending angle a is less than 100°. For example, the bending angle a is 95°. Similarly, the third side wall 2113 and the second side wall 2112 are integrally formed, and an included angle is provided between the third side wall 2113 and the second side wall 2112. Therefore, it can be known that a bend 2116 is formed at the transition position between the side edge of the third side wall 2113 and the side edge of the second side plate. The bending angle a can be 90°, making the third side wall 2113 perpendicular to the second side wall 2112. The bending angle a can also be greater than 90°, thereby reducing the probability of interference between the battery cell 22 and the position of the bend 2116 caused by processing errors when the battery cell 22 is assembled with the housing assembly 21. However, in order to reduce the space waste between the position of the bend 2116 and the battery cell 22, the bending angle a is less than 100°. For example, the bending angle a is 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, 100°.

[0101] In this example, the first side wall 2111, the second side wall 2112 and the third side wall 2113 are integrally formed. Bends 2116 are respectively formed at the positions where the second side wall 2112 is connected to the first side wall 2111 and the third side wall 2113. The angle range of the bend 2116 is controlled between 90° and 100°, so that when the battery cell 22 is installed, it is not easy to interfere with the position of the bend 2116, and a reasonable gap is maintained, reducing space waste and improving the grouping and assembly efficiency of the battery cell 22.

[0102] In some examples, referring to Figure 7 as shown, the bending angle is 90° - 95°. For example, the bending angle a is 91°, 92°, 93°, 94° or 95°.

[0103] In this example, the angle range of the bend 2116 is controlled between 90° and 95°, so that when the battery cell 22 is installed, it is not easy to interfere with the position of the bend 2116, and a reasonable gap is maintained, further reducing space waste and improving the grouping and assembly efficiency of the battery cell 22.

[0104] In some examples, the thickness of the second sidewall 2112 is greater than that of the first sidewall 2111 and the third sidewall 2113.

[0105] Specifically, the first sidewall 2111, the second sidewall 2112, and the third sidewall 2113 are all planar. The first sidewall 2111 and the third sidewall 2113 are oppositely arranged. The second sidewall 2112 is connected between the first sidewall 2111 and the third sidewall 2113. The second sidewall 2112 is oppositely arranged with the side notch 2114. Therefore, it can be known that the risk of uneven force on the second sidewall 2112 is higher and it is more likely to deform, thus affecting the overall stiffness and strength of the housing 211. Therefore, it is necessary to endow the second sidewall 2112 with higher stiffness and strength to reduce the probability of deformation of the housing 211 and improve the overall anti-deformation ability of the housing 211.

[0106] Making the thickness of the second sidewall 2112 greater than that of the first sidewall 2111 and the third sidewall 2113 is easier to implement in practical applications and is more convenient for processing and preparation. In addition, the second sidewall 2112 is respectively connected to the first sidewall 2111 and the third sidewall 2113. Increasing the thickness of the second sidewall 2112 can improve the connection strength with the first sidewall 2111 and the connection strength with the third sidewall 2113 at the same time. Only increasing the thickness of the second sidewall 2112 can improve the overall stiffness and strength of the housing 211 and is beneficial to reducing the occupation of the accommodation space 212 and minimizing the impact on the energy density of the battery 100.

[0107] In this example, the method of increasing the thickness of the second sidewall 2112 can enhance the overall strength and stiffness of the housing 211, improve the anti-deformation ability of the housing 211, and moreover, increasing the thickness of the second sidewall 2112 can occupy the accommodation space 212 as little as possible and reduce the impact on the energy density of the battery 100.

[0108] In some examples, referring to Figure 10 As shown, rib structures 2117 are formed on the wall surface of the second sidewall 2112 facing away from the accommodation space 212.

[0109] Specifically, the rib structure 2117 can be a convex structure protruding from the wall surface. A plurality of convex structures are provided, and the plurality of convex structures can be arranged in parallel or intersect at an angle. The plurality of convex structures are arranged in an array on the second side wall 2112, so as to increase the stiffness and strength of the second side wall 2112. Additionally, the rib structure 2117 can also be a groove structure formed concave on the wall surface. A plurality of groove structures are provided, and the plurality of groove structures can be arranged in parallel or intersect at an angle. The plurality of groove structures are arranged in an array on the second side wall 2112, so as to increase the stiffness and strength of the second side wall 2112. Among them, the shape of the protruding end face of the convex structure can be "T" shape or "grid" shape, and the shape of the notch end face of the groove structure can be "T" shape or "grid" shape.

[0110] The rib structure 2117 can be integrally formed with the second side wall 2112, or can be independently prepared from the second side wall 2112, so that the rib structure 2117 is connected to the second side wall 2112. The connection method between the rib structure 2117 and the second side wall 2112 can include a fixed connection method or a detachable connection method.

[0111] In this example, by providing the rib structure 2117, the stiffness and strength of the second side wall 2112 can be enhanced, thereby further enhancing the stiffness and strength of the housing 211 and improving the support performance of the housing 211.

[0112] When the battery cell 22 is assembled and used with the housing assembly 21, heat is generated during the charging and discharging process of the battery cell 22. If the heat is not dissipated in time, it will cause the temperature of the battery cell 22 to rise, affecting the working efficiency of the battery cell 22 and increasing the risk of thermal runaway of the battery cell 22. Therefore, in some examples of the present application, referring to Figures 11 - 14 as shown, a channel structure 2118 is formed on the housing 211. A cooling substance is introduced into the channel structure 2118 to cool the housing 211, so that the housing 211 can absorb the heat of the battery cell 22 and dissipate the heat in time, and cool down the battery cell 22.

[0113] The channel structure 2118 can be a through hole or a groove opened inside the housing 211. A cooling substance is introduced into the channel structure 2118. For example, the cooling substance includes a coolant, a cooling gas, etc. By introducing the cooling substance, the housing 211 is cooled, and further the purpose of cooling the battery cell 22 in the accommodation space 212 is achieved.

[0114] In one embodiment, referring to Figure 12 and Figure 14As shown, the outer shell assembly 21 further includes a tube structure 2119 which is used to be inserted into the channel structure 2118. The cooling substance is used to be introduced into the tube structure 2119, so as to achieve the purpose of cooling the housing 211. By providing the tube structure 2119, the cooling substance does not directly contact the inner wall of the channel structure 2118, reducing the corrosion of the cooling substance to the housing 211 and playing a role in protecting the housing 211. And, by providing the tube structure 2119, it is also beneficial to reduce the risk of leakage of the cooling substance. Even in case of leakage, the cooling effect on the housing 211 can be maintained by replacing the tube structure 2119, which is convenient for maintenance.

[0115] In this example, by providing the channel structure 2118, it is convenient to cool the battery cells 22 when the battery 100 is working, so that the temperature of the battery cells 22 is maintained at a relatively low level, thereby making the working efficiency of the battery cells 22 stable and reducing the risk of thermal runaway of the battery cells 22.

[0116] In some examples, referring to Figure 11 and Figure 12 as shown, the channel structure 2118 is formed inside the shell wall of the housing 211.

[0117] Specifically, the channel structure 2118 is formed inside the shell wall of the housing 211, which can be understood as that the channel structure 2118 is a through hole opened inside the shell wall of the housing 211. In the case where the housing 211 includes a first side wall 2111, a second side wall 2112 and a third side wall 2113, the through hole can be opened in at least one of the first side wall 2111, the second side wall 2112 and the third side wall 2113. That is to say, the through hole can be provided on the first side wall 2111 or the second side wall 2112 or the third side wall 2113. Or, through holes can be opened on all of the first side wall 2111, the second side wall 2112 and the third side wall 2113, and the through holes on the three side walls can be communicated with each other or independently provided. The through holes opened on each side wall can have a plurality of branch parts, that is, the through holes on each side wall can include a plurality of mutually communicated sub-through holes, so that the through hole can form more channels and coverage areas on the side wall to enhance the heat dissipation efficiency of the housing 211 and the battery cells 22.

[0118] In this example, by opening the channel structure 2118 inside the shell wall of the housing 211, the cooling substance directly enters the channel structure 2118, and the cooling substance directly cools the housing 211 from the inside out, so that the cooling substance can form a larger contact area with the housing 211, improving the cooling efficiency.

[0119] In some examples, referring to Figure 13 and Figure 14As shown, a channel structure 2118 is formed on the inner wall surface of the housing 211; the outer housing assembly 21 further includes a tube structure 2119, and the tube structure 2119 is received within the channel structure 2118.

[0120] Specifically, the inner wall surface of the housing 211 refers to the wall surface of the housing 211 facing the accommodation space 212. The channel structure 2118 is formed on the inner wall surface of the housing 211. It can be understood that the channel structure 2118 is a groove structure formed on the inner wall surface. When the housing 211 includes a first side wall 2111, a second side wall 2112, and a third side wall 2113, a groove structure is formed on the wall surface of at least one of the first side wall 2111, the second side wall 2112, and the third side wall 2113 facing the accommodation space 212. That is to say, a groove structure is formed on the wall surface of the first side wall 2111 facing the accommodation space 212, or a groove structure is formed on the wall surface of the second side wall 2112 facing the accommodation space 212, or a groove structure is formed on the wall surface of the third side wall 2113 facing the accommodation space 212, or groove structures are formed on the wall surfaces of the first side wall 2111, the second side wall 2112, and the third side wall 2113 facing the accommodation space 212. The groove structures formed on the wall surfaces of each side wall can be connected to each other or can be independently provided. The groove structures formed on the wall surfaces of each side wall can have multiple branches. That is to say, the groove structures on each side wall can include a plurality of interconnected sub-grooves, so that the groove structures can form more channels and coverage areas on the side walls to enhance the heat dissipation efficiency of the housing 211 and the battery cell 22.

[0121] The tube structure 2119 is an independent component independent of the housing 211. A through hole for circulating a cooling substance is formed in the middle of the tube structure 2119. The tube structure 2119 can be prepared from an elastic material. For example, the tube structure 2119 can be prepared from materials such as silica gel and rubber. The tube structure 2119 can also be prepared from materials such as plastics and metals. The tube structure 2119 can be received within the groove structure. The notch of the groove structure faces the inside of the accommodation space 212, and the depth of the groove is greater than or equal to the outer diameter of the tube structure 2119, so that the tube structure 2119 does not protrude outside the groove structure and does not occupy the volume of the accommodation space 212, enabling the battery cell 22 to have the largest possible volume and improving the energy density of the battery cell 22.

[0122] In this example, the channel structure 2118 is a groove structure formed on the inner wall surface of the housing 211, making the preparation of the housing 211 and the channel structure 2118 more convenient, facilitating the machining of the groove structure on the housing 211, and reducing production costs; by providing the tube structure 2119, the tube structure 2119 can be accommodated in the groove structure, and the cooling substance enters the tube structure 2119, thereby achieving the purpose of cooling the housing 211 and the battery cell 22. The overall structure of the outer shell assembly 21 is more convenient for machining and installation, and is convenient for disassembly and installation when the tube structure 2119 is damaged, and is more convenient for maintenance.

[0123] In some examples, the channel structure 2118 includes a plurality of sub-channels, and each sub-channel extends linearly and is arranged at intervals or intersects with each other.

[0124] Specifically, the channel structure 2118 including a plurality of sub-channels means that when the channel structure 2118 is a through hole formed inside the shell wall of the housing 211, there are a plurality of through holes, and the central axes of each through hole form an angle and intersect with each other, so that the plurality of through holes are interconnected and can cover a larger area on the shell wall of the housing 211, improving the heat dissipation area; when the channel structure 2118 is a groove structure formed on the inner wall surface of the housing 211, there are a plurality of groove structures, and the extending directions of each groove structure form an angle and intersect with each other, so that the plurality of groove structures are interconnected and can form a larger coverage area on the surface of the shell wall of the housing 211, which is beneficial to improving the heat dissipation area and further improving the heat dissipation efficiency.

[0125] Each sub-channel extends linearly, where the linear shape may include a straight line shape, a curved line shape, etc., and the curved line shape may include an arc-shaped curve shape or a broken line shape, etc., so that various shapes can be formed by the extension between the sub-channels. For example, the sub-channels can be arranged in parallel and at intervals, or the sub-channels intersect in a straight line shape, or the sub-channels are bent and extended to be connected to form a concentric circular shape or a spiral winding shape, etc.

[0126] In this example, the channel structure 2118 includes a plurality of sub-channels, so that the channel structure 2118 forms a larger coverage area on the housing 211, improving the heat absorption and heat dissipation areas, and further improving the efficiency of cooling and temperature reduction.

[0127] In some examples, referring to Figure 11 As shown, the channel structure 2118 has a channel inlet 21181 and a channel outlet 21182, and both the channel inlet 21181 and the channel outlet 21182 extend to the side notch 2114 respectively.

[0128] Specifically, the channel structure 2118 is used to allow a cooling substance to flow through, so that the cooling substance can flow within the channel structure 2118. It can be understood that the channel structure 2118 has a channel inlet 21181 and a channel outlet 21182. The channel inlet 21181 is used for the inflow of the relatively hot cooling substance, and the channel outlet 21182 is used for the outflow of the cooling substance after absorbing heat.

[0129] The side notch 2114 has two opposite side edges. For example, in the case where the housing 211 includes a first side wall 2111, a second side wall 2112, and a third side wall 2113, the side notch 2114 is formed at the side edge of the first side wall 2111 and the side edge of the third side wall 2113. Therefore, it can be known that the two side edges of the side notch 2114 are the edges of the first side wall 2111 on the side away from the second side wall 2112 and the edges of the third side wall 2113 on the side away from the second side wall 2112. The channel inlet 21181 and the channel outlet 21182 can be respectively formed at the side edge of the first side wall 2111 and the side edge of the third side wall 2113. The channel structure 2118 can extend from the first side wall 2111, pass through the second side wall 2112, and then extend to the edge of the third side wall 2113, so that the channel structure 2118 covers the wall surface of the entire housing 211, increasing the heat dissipation area. In addition, the position of the side edge facilitates the machining of holes or notches and can facilitate the connection with an external pipe connection structure, improving the convenience of machining and installation.

[0130] Optionally, in the case where there are folding ears 2115, the channel inlet 21181 and the channel outlet 21182 can also be respectively opened on the two folding ears 2115, which is more convenient for machining and for connecting with an external pipe connection structure, improving the convenience of machining and installation.

[0131] In this example, the positions of the channel inlet 21181 and the channel outlet 21182 are set such that the channel structure 2118 is more convenient for machining and for connecting with an external pipe connection structure. In addition, the cooling substance can flow through the entire shell wall of the housing 211 from one side or one folding ear 2115 of the side notch 2114 and then return to the other side edge or the other folding ear 2115 of the side notch 2114, which can increase the heat dissipation area of the channel structure 2118 on the housing 211 and improve the cooling efficiency of the housing 211 and the battery cell 22.

[0132] In some examples, as shown in Figure 15 an insulating layer 2120 is formed on the inner wall surface of the housing 211 facing the accommodation space 212.

[0133] Specifically, the inner wall surface of the housing 211 refers to the wall surface or surface of the housing 211 facing the accommodation space 212. The insulating layer 2120 can adopt a film structure with insulating function, so that the insulating layer 2120 is pasted on the inner wall surface of the housing 211.

[0134] Although the surface of the battery cell 22 itself has insulating properties, in order to reduce the insulation reliability between the battery cell 22 and the housing 211 in the case of leakage of the battery cell 22, the inner wall surface of the housing 211 in contact with the battery cell 22 is insulated, and the insulating layer 2120 is attached to the inner wall surface of the housing 211, so that even if the battery cell 22 leaks, the risk of short circuit between the battery cell 22 and the housing 211 will be reduced to a relatively low level, improving the reliability during the use of the battery 100.

[0135] In this example, the insulating layer 2120 is connected to the inner wall surface of the housing 211, which is used to play an insulating effect between the housing 211 and the battery cell 22, reduce the risk of short circuit between the battery cell 22 and the housing 211, and improve the reliability of the battery 100.

[0136] Based on the above-mentioned housing assembly 21, the present application further provides a battery 100. Refer to Figure 13 As shown, the battery 100 includes a battery cell 22 and the housing assembly 21 in any one of the above embodiments. The battery cell 22 includes an electrode core. The housing assembly 21 has an accommodation space 212, and the battery cell 22 is accommodated in the accommodation space 212.

[0137] Specifically, the battery cell 22 includes an electrode core, which is one of the core components of the battery 100. The electrode core can convert chemical energy into electrical energy. The basic structure of the electrode core includes a positive electrode plate, a negative electrode plate, an electrolyte, a separator, and electrode tabs. The electrode tabs include a positive electrode tab connected to the positive electrode plate and a negative electrode tab connected to the negative electrode plate. The positive electrode plate and the negative electrode plate are separated by an electrolyte and a separator. During the discharge process, oxidation-reduction reactions occur between the positive electrode plate and the negative electrode plate, generating current. The types of electrode cores include lithium-ion electrode cores (Li-ion), nickel-metal hydride electrode cores (NiMH), nickel-cadmium electrode cores (NiCd), etc. Lithium-ion electrode cores have characteristics such as high energy density and light weight.

[0138] The outer shell assembly 21 is used to install and accommodate the battery cells in the battery module 22. Therefore, the outer shell assembly 21 encloses to form an accommodation space 212, and the battery cells or the battery module 22 formed by the battery cells are installed in the accommodation space 212. When assembling the battery module 22 and the outer shell assembly 21, the housing 211 needs to be prepared. Before installing the end cap 213, the battery module 22 is installed in the accommodation space 212 of the housing 211, and then the end cap 213 is installed. The locking assembly 214 is connected to the end cap 213 and the housing 211 respectively, so that the end cap 213 is fixed on the housing 211. At this time, the battery module 22 is restricted in the accommodation space, and the outer shell assembly 21 and the battery module 22 together form the battery 100.

[0139] In a specific embodiment, referring to Figure 4 As shown, the outer shell assembly 21 is applied to the battery 100 and is used to accommodate the battery module 22. The outer shell assembly 21 includes a housing 211, an end cap 213 and a locking assembly 214. Among them, the housing 211 has an accommodation space 212. The housing 211 bends and extends around a preset axis to enclose and form the accommodation space 212. A side notch 2114 is formed on the side of the housing 211. The end cap 213 is movably connected to the housing 211 and blocks the side notch 2114. The locking assembly 214 is connected between the housing 211 and the end cap 213 to lock the end cap 213 on the housing 211. Two edges of the housing 211 located at the side notch 2114 respectively extend towards the center of the side notch 2114 to form folding ears 2115. The two folding ears 2115 are respectively connected to the end cap 213 through the locking assembly 214. The locking assembly 214 is threadedly connected to the housing 211 and the end cap 213 respectively. The housing 211 includes a first side wall 2111, a second side wall 2112 and a third side wall 2113. The first side wall 2111, the second side wall 2112 and the third side wall 2113 are sequentially connected and arranged around a preset axis. A side notch 2114 is formed between the first side wall 2111 and the third side wall 2113. The end cap 213 is connected to the first side wall 2111 and the third side wall 2113 through the locking assembly 214 respectively. A rib structure 2117 is formed on the wall surface of the second side wall 2112 facing away from the accommodation space 212. A channel structure 2118 is formed on the housing 211. The channel structure 2118 is formed inside or on the inner wall surface of the housing 211. An insulating layer 2120 is formed on the inner wall surface of the housing 211 facing the accommodation space 212.

[0140] Based on the above outer shell assembly 21, the present application also proposes an example of a battery 100. Combining Figure 1 and Figure 2 As shown, the battery 100 includes the outer shell assembly 21 as described in any of the above examples.

[0141] The battery 100 in this example includes a box 10 and a battery module 20, and the battery module 20 is installed in the box 10; or, the battery 100 includes a box 10 and a battery cell 22, and the battery cell 22 is installed in the box 10. The battery 100 may include one of the above-mentioned battery modules 20 or battery cells 22, and the battery 100 may also include multiple battery modules 20 or multiple battery cells 22. When multiple of the above-mentioned battery modules 20 or battery cells 22 are provided in the battery 100, the multiple battery modules 20 or multiple battery cells 22 may be arranged according to a preset rule. Multiple battery modules 20 or multiple battery cells 22 may be arranged in a row of multiple columns or multiple rows and multiple columns. Multiple battery modules 20 or multiple battery cells 22 may be connected in series, in parallel, or in series and parallel.

[0142] It is understandable that in this example, only the battery 100 including the above-mentioned housing assembly 21 is described, and the battery 100 may also include other functional components, which will not be described in detail.

[0143] The example of the battery 100 in the present application is based on the example of the above-mentioned housing component 21, and the example of the battery 100 includes all the technical effects of the example of the above-mentioned housing component 21, which will not be repeated here.

[0144] In some examples, reference Figure 1 As shown, an example of an electrical device is disclosed, and the electrical device includes the housing assembly 21 described in any of the above examples, or the battery 100 described in any of the above examples, or the battery 100 described in any of the above examples.

[0145] The electrical devices in this example include, but are not limited to: mobile phones, portable devices, laptop computers, electric vehicles, electric vehicles 1000, ships, spacecraft, electric toys and electric tools, etc. The housing assembly 21 described in any of the above examples can be installed separately in the electrical device, and the above-mentioned battery 100 can also be installed in the electrical device.

[0146] The example of the electrical device in the present application is based on the example of the above-mentioned housing component 21 or the battery 100. The example of the electrical device includes all the technical effects of the example of the above-mentioned housing component 21 or the battery 100, which will not be repeated here.

[0147] The above are only preferred embodiments of the present application, and only specifically describe the technical principles of the present application. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application, and other specific implementation methods of the present application that can be associated with the technicians in this field without creative work, should be included in the scope of protection of the present application.

Claims

1. A housing assembly, used in a battery and used to accommodate a battery cell, characterized in that: The housing assembly comprises: A shell having a receiving space, wherein the shell is bent and extended around a preset axis to enclose and form the receiving space, and a side notch is formed on a side of the shell; An end cover, movably connected to the housing and blocked in the side notch; The locking assembly is connected between the shell and the end cover so that the end cover is locked on the shell.

2. The housing assembly according to claim 1, wherein: Two edges of the shell body located at the side notch respectively extend toward the center of the side notch to form folded ear parts, and the two folded ear parts are respectively connected to the end cover through the locking assembly.

3. The housing assembly according to claim 1, wherein: The locking assembly is threadedly connected to the housing and the end cover respectively.

4. The housing assembly according to claim 1, wherein: The housing comprises a first side wall, a second side wall and a third side wall, wherein the first side wall, the second side wall and the third side wall are sequentially connected and arranged around the preset axis, and the side notch is formed between the first side wall and the third side wall; The end cover and the first side wall as well as the end cover and the third side wall are both connected via the locking assembly.

5. The housing assembly according to claim 4, wherein: The first side wall, the second side wall and the third side wall are all planar, and the connection position between the second side wall and the first side wall, and the connection position between the second side wall and the third side wall are all bent, and the bending angle range is 90°-100°.

6. The housing assembly according to claim 5, wherein: The bending angle is 90°-95°.

7. The housing assembly according to claim 5, wherein: The thickness of the second side wall is greater than the thickness of the first side wall and the third side wall.

8. The housing assembly according to claim 5, wherein: A rib structure is formed on a wall surface of the second side wall facing away from the accommodation space.

9. The housing assembly according to any one of claims 1 to 8, characterized in that: A channel structure is formed on the shell.

10. The housing assembly according to claim 9, wherein: The channel structure is formed inside the shell wall of the shell.

11. The housing assembly according to claim 9, wherein: The channel structure is opened on the inner wall surface of the shell; the shell component also includes a tube structure, and the tube structure is accommodated in the channel structure.

12. The housing assembly according to claim 9, wherein: The channel structure includes a plurality of sub-channels, and each of the sub-channels is arranged to extend linearly.

13. The housing assembly according to claim 9, wherein: The channel structure has a channel inlet and a channel outlet, and the channel inlet and the channel outlet both extend to the side notch, respectively.

14. The housing assembly according to any one of claims 1 to 8, characterized in that: An insulating layer is formed on the inner wall surface of the shell facing the accommodating space.

15. A battery, characterized in that: The battery comprises a battery cell and a housing assembly as claimed in any one of claims 1 to 14, and the battery cell is accommodated in the accommodation space.

16. An electrical device, characterized in that: Comprising the housing assembly according to any one of claims 1 to 14, or, comprising the battery according to claim 15.

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