Battery monomer, battery and electric device

Abstract

The utility model belongs to the technical field of batteries, and provides a single battery, a battery and a power utilization device.The single battery comprises a battery cell and a shell assembly, and the shell assembly comprises a shell, an end cover and a sealing assembly; the shell is provided with an inner cavity and an opening, the battery cell is accommodated in the inner cavity, a groove structure is formed on the cavity wall of the inner cavity, the groove structure is arranged in a surrounding and extending manner around the axial direction of the opening, the groove structure is provided with a first side surface, a bottom surface and a second side surface which are sequentially connected, and the first side surface and the second side surface are respectively positioned on two sides of the bottom surface along the axial direction of the opening; the end cover is provided with an edge part which is inserted into the groove structure; the sealing assembly comprises a first sealing piece and a second sealing piece which are independent of each other, the first sealing piece is provided with a first sealing face, the first sealing face abuts against the first side face, the second sealing piece is provided with a second sealing face, and the second sealing face abuts against the bottom face. The utility model aims to solve the technical problem of high leakage risk caused by poor sealing effect of a shell assembly in a battery monomer.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery cell, a battery and an electrical device. Background Art

[0002] Cylindrical batteries are a common type of battery, especially in the field of rechargeable batteries (such as lithium-ion batteries). Cylindrical batteries usually include a shell and a battery cell, the battery cell is installed inside the shell, the shell includes a shell and an end cap, the shell has an opening, the end cap is connected to the shell and covers the opening, and a seal is usually configured between the connection position of the end cap and the shell.

[0003] In the related art, the sealing effect of the seal is poor, resulting in a high risk of battery leakage. Utility Model Content

[0004] The purpose of the present application is to provide a battery cell, a battery and an electrical device, aiming to solve the technical problem that the sealing effect of the outer shell component in the battery cell is poor, resulting in a high risk of leakage.

[0005] In a first aspect, the present application provides a battery cell, including a battery cell and a housing assembly, wherein the housing assembly includes:

[0006] A shell having an inner cavity and an open opening, wherein the battery cell is accommodated in the inner cavity, and a groove structure is formed on a cavity wall of the inner cavity near the open opening, wherein the groove structure is arranged to extend around the axial direction of the open opening, and wherein the groove structure has a first side surface, a bottom surface, and a second side surface connected in sequence, and along the axial direction of the open opening, the first side surface and the second side surface are respectively located on both sides of the bottom surface;

[0007] An end cover having an edge portion, wherein the edge portion is inserted into the groove structure;

[0008] A sealing component is arranged between the edge portion and the groove structure; the sealing component includes a first sealing member and a second sealing member which are independent of each other, the first sealing member has a first sealing surface which abuts against the first side surface, and the second sealing member has a second sealing surface which abuts against the bottom surface.

[0009] In this example, a groove structure is opened on the shell so that the edge portion of the end cover is inserted into the groove structure, and a first seal and a second seal are arranged between the edge portion and the groove structure, so that the first sealing surface of the first seal abuts against the first side surface of the groove structure, and the second sealing surface of the second seal abuts against the bottom surface of the groove structure. Since the bottom surface of the groove structure and the first side surface are arranged at a first angle, when the direction of vibration is perpendicular to the first sealing surface, the component force of the force generated by the vibration in the direction perpendicular to the first sealing surface or the bottom surface will be reduced, and the component force generated by the vibration will not easily cause the second sealing surface to separate from the bottom surface, thereby achieving the effect of improving the sealing performance.

[0010] In one embodiment, the first sealing member includes a first sealing body, the first sealing body is extended along the first side surface and forms the first sealing surface, and the edge portion abuts against a side surface of the first sealing body that is opposite to the first sealing surface.

[0011] In this example, the first sealing body is extended along the first side surface, so that the first sealing surface is formed on a surface of the sheet-shaped first sealing body, so that the first sealing surface can fit tightly with the first side surface, and after the edge of the end cover is inserted into the groove structure, the edge squeezes the first sealing component, so that the first sealing surface fits more closely with the first side surface, thereby improving the sealing performance.

[0012] In one embodiment, the second sealing member includes a second sealing body, the second sealing body is extended along the bottom surface and forms the second sealing surface abutting the bottom surface, and the edge portion abuts against a side surface of the second sealing body facing away from the second sealing surface.

[0013] In this example, the second sealing body is squeezed between the edge portion and the bottom surface, and the second sealing body is set at a first angle with the first sealing body, that is, the second sealing body is set at an angle with the vibration direction. Therefore, it can be seen that the component force generated by the vibration in the direction perpendicular to the second sealing body will be reduced, and the component force generated by the vibration will not easily cause the second sealing body to separate from the bottom surface, thereby achieving the effect of improving the sealing performance.

[0014] In one embodiment, the second sealing member further includes a third sealing body, the third sealing body is extended along the second side surface and forms a third sealing surface abutting against the second side surface, and the edge portion abuts against the third sealing body.

[0015] In this example, the third sealing body is arranged between the edge of the end cover and the second side surface. On the one hand, it can play a sealing role. On the other hand, the third sealing body is connected to the second sealing body, which can enhance the structural strength of the second sealing component and facilitate positioning and installation in the groove structure.

[0016] In one embodiment, the second sealing member further includes a limiting body, which is connected to an edge of the third sealing body away from the second sealing body and extends toward a notch end surface of the groove structure to abut against the notch end surface of the groove structure.

[0017] In this example, a limiting body is connected to the third sealing body, and the limiting body abuts against the end face of the groove structure, so that the limiting body plays a limiting role on the third sealing body. When the edge of the end cover is inserted into the groove structure, the limiting body is blocked on the end face of the groove, so that the third sealing body is not easy to move toward the bottom surface, the position of the second sealing component is more stable, and the sealing effect is improved.

[0018] In one embodiment, the second sealing member further includes a fourth sealing body, the fourth sealing body is extended along the first side surface and forms a fourth sealing surface abutting against the first side surface, and the edge portion abuts against the fourth sealing body.

[0019] In this example, the fourth sealing body is arranged between the edge of the end cover and the first surface side. On the one hand, it can play a sealing role. On the other hand, the fourth sealing body is connected to the second sealing body, which can enhance the structural strength of the second sealing component and facilitate positioning and installation in the groove structure. On the other hand, the fourth sealing surface on the fourth sealing body abuts against the first side surface, which can improve the sealing effect.

[0020] In one embodiment, the first sealing member further includes a fifth sealing body, which is connected to an edge of the first sealing body close to the bottom surface and extends outwardly toward the center of the bottom surface to form a fifth sealing surface abutting against the bottom surface.

[0021] In this example, by setting the fifth sealing body, the fifth sealing surface is formed on the fifth sealing body, and the fifth sealing body is set at an angle to the first sealing body. When the vibration causes the first sealing body to move relative to the groove structure, the fifth sealing surface of the fifth sealing body is not easily separated from the bottom surface, thereby improving the sealing effect.

[0022] In one embodiment, the first sealing member further includes a positioning body, which is connected to a side of the first sealing body away from the bottom surface and extends toward a notch end surface of the groove structure to abut against the notch end surface of the groove structure.

[0023] In this example, a positioning body is connected to the first sealing body, and the positioning body abuts against the end face of the groove structure, so that the positioning body plays a role of limiting the first sealing body. When the edge of the end cover is inserted into the groove structure, the positioning body is blocked on the end face of the groove, so that the first sealing body is not easy to move toward the bottom surface, the position of the first sealing component is more stable, and the sealing effect is improved.

[0024] In one of the embodiments, the first sealing member abuts against the second sealing member in the groove structure between the housing and the end cover.

[0025] In this example, the first seal member is abutted against the second seal member, which can reduce the deformation problem of the first seal member and the second seal member when the edge of the end cover is plugged into the groove structure, and is beneficial to improving the stability of the overall structure.

[0026] In one of the embodiments, a gap space is formed between the first sealing member and the second sealing member in the groove structure between the housing and the end cover.

[0027] In this example, the gap space is used to extend the first seal and the second seal when they are squeezed, reducing the resistance of the first seal and the second seal when the edge of the end cover is inserted into the groove structure, so that the edge can be inserted into the groove structure more smoothly, thereby improving the convenience of assembling the end cover and the shell.

[0028] In one embodiment, the shell includes a main body and an assembly part, the main body forms at least a portion of the inner cavity, the assembly part is connected to the main body and surrounds and forms a portion of the inner cavity, the opening is formed in the assembly part, and the groove structure is opened on the cavity wall of the inner cavity of the assembly part close to the opening.

[0029] In this example, the shell is provided with an assembly part, so that the groove structure is separately arranged on the assembly part, and the assembly part is independent of the main body, so that the assembly part and the main body can be connected in a detachable manner, so that when the assembly part is damaged, it is convenient to replace it separately, and the main body can continue to be used, so as to reduce costs.

[0030] In a second aspect, the present application provides a battery, comprising the battery cell in the above embodiment.

[0031] In a third aspect, the present application provides an electrical device, which includes the battery cell or battery in the above embodiment, and the battery is used to provide electrical energy.

[0032] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0035] Figure 2 A schematic diagram of the exploded structure of a battery provided in some embodiments of the present application;

[0036] Figure 3 A schematic diagram of the structure of a housing assembly in some embodiments of the present application;

[0037] Figure 4 for Figure 3 A zoomed in view of the A position Figure 1 ;

[0038] Figure 5 for Figure 4 Structural schematic diagram of the middle slot structure;

[0039] Figure 6 for Figure 3 A zoomed in view of the A position Figure 2 ;

[0040] Figure 7 for Figure 6 A schematic diagram of the structure of the sealing assembly;

[0041] Figure 8 for Figure 7 A schematic structural diagram of the first sealing member;

[0042] Fig. 9 for Figure 7 A schematic diagram of the structure of the second sealing member;

[0043] Fig.10 for Figure 3 A zoomed in view of the A position Figure 3 ;

[0044] Fig.11 for Fig.10 A schematic diagram of the structure of the sealing assembly;

[0045] Fig.12 for Figure 3 A zoomed in view of the A position Figure 3 ;

[0046] Fig.13 for Fig.12 A schematic diagram of the structure of the sealing assembly;

[0047] Fig.14 for Figure 3 A zoomed in view of the A position Figure 3 ;

[0048] Fig.15 for Fig.14 A schematic diagram of the structure of the sealing assembly;

[0049] Fig.16 for Fig.13 Dimensional diagram of the seal assembly.

[0050] Description of reference numerals:

[0051] 1000, vehicle; 100, battery; 10, housing; 11, first part; 12, second part; 20, battery cell; 21, end cover; 211, edge; 22, housing; 221, assembly part; 222, main body; 223, inner cavity; 224, groove structure; 2241, first side surface; 2242, second side surface; 2243, bottom surface; 2244, notch; 225, open mouth; 23, sealing assembly; 231, first sealing member; 2311, first sealing surface; 2312, fifth sealing surface; 2 313, first sealing body; 2314, positioning body; 23141, positioning surface; 2315, fifth sealing body; 232, second sealing member; 2321, second sealing surface; 2322, third sealing surface; 2323, second sealing body; 2324, third sealing body; 2325, limiting body; 23251, limiting surface; 2326, fourth sealing body; 2327, fourth sealing surface; X, axial direction of the open mouth; a, first angle; β, second angle; 24, gap space; 200, controller; 300, motor. DETAILED DESCRIPTION

[0052] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0055] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0058] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0059] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] Cylindrical batteries are a common type of battery, especially in the field of rechargeable batteries (such as lithium-ion batteries). Cylindrical batteries usually include a housing assembly and a battery cell. The battery cell is accommodated in the housing assembly. The housing assembly includes a shell and an end cap. The battery cell is installed in the inner cavity of the shell. The shell has an open opening. The end cap is connected to the shell and covers the open opening. A seal is usually configured between the connection position of the end cap and the shell.

[0061] In the related art, the seal is in the form of a sheet, has a sealing surface, is arranged between the shell and the end cover, and the sealing surface of the seal abuts against the connection surface of the shell to seal between the shell and the end cover. However, when the battery cell is in use, when the external environment vibrates, the battery cell vibrates in a direction perpendicular to the sealing surface, which causes the end cover to move relative to the shell in a direction perpendicular to the sealing surface, resulting in a gap between the connection surface of the shell and the sealing surface of the seal, resulting in a loose seal and easy leakage.

[0062] Therefore, the present application provides a battery cell 20, in which the shell assembly can enhance the sealing performance of the seal between the end cover 21 and the shell 22, and even in the case of vibration, the surface of the shell 22 and the surface of the end cover 21 can abut against the sealing surface of the seal, thereby reducing the risk of leakage between the end cover 21 and the shell 22, which is beneficial to improving the reliability of the battery cell 20 during use.

[0063] Specifically, the first aspect of the embodiment of the present application provides a battery cell 20, which may be a cylindrical battery 100, and the cylindrical battery 100 may be a rechargeable battery 100, for example, a lithium-ion battery 100. The battery cell 20 disclosed in the embodiment of the present application can be used in an electrical device that uses the battery 100 as a power source or various energy storage systems that use the battery 100 as an energy storage element. The electrical device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, 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 car toy, an electric ship toy, and an electric airplane toy, and the like, and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0064] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0065] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0066] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0067] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a box 10 and a battery cell 20, and the battery cell 20 is contained in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 may be a hollow structure with one end open, the first part 11 may be a plate-like structure, and 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 a storage space; the first part 11 and the second part 12 may also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 may be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0068] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery 100 module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery 100 modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0069] The battery cell 20 refers to the smallest unit constituting the battery 100. Each battery cell 20 may be a secondary battery 100 or a primary battery 100; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular or in other shapes.

[0070] According to some embodiments of the present application, referring to Figure 3-7 As shown, the embodiment of the present application provides a battery cell 20, which includes a battery cell and a shell assembly, and the shell assembly includes a shell 22, an end cover 21 and a sealing assembly 23; the shell 22 has an inner cavity 223 and is provided with an open opening 225, the battery cell is accommodated in the inner cavity 223, and a groove structure 224 is formed on the cavity wall of the inner cavity 223 near the open opening 225, and the groove structure 224 is extended around the axial direction X of the open opening 225, and the groove structure 224 has a bottom surface 2243, a first side surface 2241 and a second side surface 2242, and the first side surface 2241, the bottom surface 2243 and the second side surface 2242 are connected in sequence, Along the axial direction X of the open opening 225, the first side surface 2241 and the second side surface 2242 are respectively located on both sides of the bottom surface 2243; the end cover 21 has an edge portion 211, and the edge portion 211 is inserted into the groove structure 224; the sealing assembly 23 is arranged between the edge portion 211 and the groove structure 224; the sealing assembly 23 includes a first sealing member 231 and a second sealing member 232 that are independent of each other, the first sealing member 231 has a first sealing surface 2311, and the first sealing surface 2311 is abutted against the first side surface 2241, and the second sealing member 232 has a second sealing surface 2321, and the second sealing surface 2321 is abutted against the bottom surface 2243.

[0071] Specifically, the shell 22 is used to wrap around the outside of the battery cell to protect the battery cell from the outside. The outer shape of the shell 22 can be cylindrical, flat, rectangular or other shapes. The shell 22 has an inner cavity 223. The shell 22 is connected to the end cover 21, so that the inner cavity 223 is closed to form a receiving space. The inner cavity 223 or the receiving space is used to accommodate the battery cell. The shell 22 has an open mouth 225, which is connected to the inner cavity 223 of the shell 22. The open mouth 225 can be formed at any position of the shell 22. Taking the cylindrical battery cell 20 as an example, the shell 22 of the cylindrical battery cell 20 is cylindrical, and the open mouth 225 is formed at one end of the cylinder along the central axis. One end of the cylinder can be set through to form the open mouth 225. The open mouth 225 can be used to allow the battery cell to enter the inner cavity 223 of the shell 22. The contour shape of the open opening 225 is a closed ring. Specifically, the shape of the open opening 225 may include a circular ring, an elliptical ring, and a ring formed by a plurality of edges.

[0072] The battery cell is one of the core components of the battery cell 20. The battery cell can convert chemical energy into electrical energy. The basic structure of the battery cell includes a positive electrode sheet, a negative electrode sheet, an electrolyte, a separator and a pole ear. The pole ear includes a positive pole ear connected to the positive electrode sheet and a negative electrode connected to the negative electrode sheet. The positive electrode sheet and the negative electrode sheet are separated by an electrolyte and a separator. During the discharge process, the positive electrode sheet and the negative electrode sheet undergo a redox reaction to generate current. The types of battery cells include lithium-ion batteries (Li-ion), nickel-metal hydride batteries (NiMH), nickel-cadmium batteries (NiCd), etc. Lithium-ion batteries have the characteristics of high energy density and lightweight.

[0073] The shell 22 is used to install and accommodate the battery cells in the battery unit 20 , so the shell 22 and the end cover 21 are connected to form a receiving space, and the battery cells are installed in the receiving space.

[0074] The opening 225 is provided on the shell 22, and the cavity wall of the inner cavity 223 near the opening 225 can be used to connect with the end cover 21. Therefore, the groove structure 224 can be provided on the cavity wall of the inner cavity 223 near the opening 225. For example, in a cylindrical battery cell 20, the shell 22 is cylindrical, and one end of the cylinder is through-set to form the opening 225. In this case, the opening 225 can be understood as a hole structure, and the cavity wall of the inner cavity 223 near the opening 225 can be understood as the inner wall of the hole structure. The hole wall, the open mouth 225 has an axial and radial direction, the radial direction can be understood as the diameter direction of the open mouth 225, and the axial direction can be understood as the center axis direction of the open mouth 225 (or the hole structure). The groove structure 224 can extend around the axial direction X of the open mouth 225 and be opened on the cavity wall of the inner cavity 223 near the open mouth 225. The groove structure 224 can extend continuously to form a ring, or the groove structure 224 can extend intermittently around the axial direction X of the open mouth 225 to form a plurality of spaced sub-groove structures 224.

[0075] The groove structure 224 can be understood as a part of a roller groove structure or a part of a rolling groove structure. The roller groove structure or the rolling groove structure is prepared by bending or crimping. The groove structure 224 is a groove. The groove structure 224 has a bottom surface 2243 and side surfaces that are connected to the bottom surface 2243 and are respectively located on both sides of the bottom surface 2243 and are arranged opposite to each other. The two side surfaces are respectively a first side surface 2241 and a second side surface 2242, wherein the bottom surface 2243 can be understood as the groove bottom of the groove structure 224, and the side surface can be understood as the groove wall surface or side wall surface of the groove structure 224; the bottom surface 2243 and the first side surface 2241 It is set at a first angle a, the range of the first angle a is 0°-90°, but does not include 0°. When the first angle a is 90°, the first side surface 2241 is perpendicular to the bottom surface 2243; the bottom surface 2243 and the second side surface 2242 are set at a second angle β, the range of the second angle β is 0°-90°, but does not include 0°. When the second angle β is 90°, the second side surface 2242 is perpendicular to the bottom surface 2243; when the first angle a is equal to the second angle β and both are equal to 90°, the first side surface 2241 is parallel to the second side surface 2242 and perpendicular to the bottom surface 2243.

[0076] For the bottom surface 2243, the bottom surface 2243 may be arranged at a third angle with the central axis of the open opening 225, the third angle ranges from 0° to 90°, but does not include 90°. When the third angle is 0°, and the first angle a and the second angle β are both 90°, the bottom surface 2243 is parallel to the central axis of the open opening 225, the first side surface 2241 and the second side surface 2242 are both perpendicular to the bottom surface 2243 and the central axis of the open opening 225, and the groove structure 224 is a groove with a rectangular cross-sectional profile opened on the cavity wall of the inner cavity 223 near the open opening 225. The shell 22 has a shell bottom, and the shell bottom and the open opening 225 may be arranged oppositely. Of the first side surface 2241 and the second side surface 2242, the first side surface 2241 may be located on a side of the bottom surface 2243 near the shell bottom, or the second side surface 2242 may be located on a side of the bottom surface 2243 near the shell bottom.

[0077] The end cap 21 is used to connect with the housing 22 and cover the opening 225 to seal the inner cavity 223 to form a receiving space. The end cap 21 has an edge portion 211, which refers to the outer edge position or edge position of the end cap 21 away from the center. For example, if the end cap 21 is in the shape of a plate, the edge portion 211 refers to the edge portion of the plate away from the center. The end cap 21 can be circular, elliptical or polygonal, etc., to match the shape of the opening 225 of the housing 22.

[0078] When the end cover 21 is connected to the shell body 22, the edge portion 211 of the end cover 21 is inserted into the groove structure 224, and a plug-in structure is formed between the edge portion 211 of the end cover 21 and the groove structure 224. In order to improve the sealing between the edge portion 211 and the groove structure 224, a sealing assembly 23 is arranged between the edge portion 211 and the groove structure 224.

[0079] The sealing assembly 23 includes a first sealing member 231 and a second sealing member 232 which are independent of each other, wherein the first sealing member 231 has a first sealing surface 2311, and the first sealing member 231 is located between the edge portion 211 and the first side surface 2241 of the groove structure 224, so that the first sealing surface 2311 abuts against the first side surface 2241 of the groove structure 224; the second sealing member 232 has a second sealing surface 2321, and the second sealing member 232 is also located between the edge portion 211 and the bottom surface 2243 of the groove structure 224, so that the second sealing surface 2321 abuts against the bottom surface 2243 of the groove. Therefore, it can be known that when the sealing component 23 is installed between the edge portion 211 and the groove structure 224, two sealing positions are formed between the sealing component 23 and the shell 22, and the two sealing positions are respectively the position where the first sealing surface 2311 abuts against the first side surface 2241 and the position where the second sealing surface 2321 abuts against the bottom surface 2243. Since the bottom surface 2243 of the groove structure 224 is set at an angle with the side surface, it can be known that the first sealing surface 2311 and the second sealing surface 2321 are set at an angle, and the angle is the above-mentioned first angle a.

[0080] The first seal 231 and the second seal 232 can be made of elastic materials, such as silicone, rubber, etc., so that when the edge portion 211 of the end cover 21 is inserted into the groove structure 224, the first seal 231 and the second seal 232 can be elastically deformed, so that an extrusion force is formed between the first sealing surface 2311 and the first side surface 2241 and between the second sealing surface 2321 and the bottom surface 2243 to improve the sealing effect. Of course, the first seal 231 and the second seal 232 can also be made of materials such as plastics and metals.

[0081] When the external environment of the battery cell 20 generates vibration, and the vibration direction is perpendicular to the first side surface 2241 or the first sealing surface 2311, the vibration may cause the end cover 21 to move relative to the shell 22 in a direction parallel to the vibration direction, causing the first side surface 2241 and the first sealing surface 2311 to separate and generate a gap. However, since the second sealing surface 2321 or the bottom surface 2243 is set at a first angle a with the first sealing surface 2311, that is, the second sealing surface 2321 or the bottom surface 2243 is at a first angle a with the vibration direction, it can be known that the component force generated by the vibration in the direction perpendicular to the second sealing surface 2321 or the bottom surface 2243 will be reduced, and the component force generated by the vibration will not easily cause the second sealing surface 2321 and the bottom surface 2243 to separate, thereby achieving the effect of improving the sealing performance.

[0082] In addition, the first seal 231 and the second seal 232 are independent components. When the first seal 231 moves relative to the shell 22 due to vibration, the first seal 231 will not squeeze or pull the second seal 232, and will not generate any force on the second seal 232, thereby not affecting the sealing position and sealing effect of the second seal 232, thereby maintaining and improving the sealing reliability of the second seal 232.

[0083] In this example, a groove structure 224 is provided on the shell body 22 so that the edge portion 211 of the end cover 21 is inserted into the groove structure 224, and a first seal 231 and a second seal 232 are provided between the edge portion 211 and the groove structure 224 so that the first sealing surface 2311 of the first seal 231 abuts against the first side surface 2241 of the groove structure 224, and the second sealing surface 2321 of the second seal 232 abuts against the bottom surface 2243 of the groove structure 224. Since the bottom surface 2243 of the groove structure 224 is provided at a first angle a with the first side surface 2241, when the direction of vibration is perpendicular to the first sealing surface 2311, the component force of the force generated by the vibration in the direction perpendicular to the first sealing surface 2311 or the bottom surface 2243 will be reduced, and the component force generated by the vibration is not likely to cause the second sealing surface 2321 to separate from the bottom surface 2243, thereby achieving the effect of improving the sealing performance.

[0084] In some examples, reference Figure 3 , Figure 4 and Figure 6-8 As shown, the first sealing member 231 includes a first sealing body 2313 , which is extended along the first side surface 2241 to form a first sealing surface 2311 , and the edge portion 211 abuts against a side of the first sealing body 2313 facing away from the first sealing surface 2311 .

[0085] Specifically, the first sealing body 2313 extends along the first side surface 2241 into a sheet shape. The first sealing body 2313 has two oppositely disposed surfaces. The first sealing surface 2311 is formed on one surface of the first sealing body 2313 , and the other surface of the first sealing body 2313 abuts against the edge portion 211 of the end cover 21 .

[0086] Since the first sealing body 2313 is located between the edge portion 211 of the end cover 21 and the first side surface 2241, and the first sealing body 2313 needs to avoid the open opening 225, it can be seen that the cross-section of the first sealing body 2313 is an annular sheet with a through hole formed in the center, and the first sealing body 2313 has two opposite surfaces, and the two surfaces can be arranged in parallel or at an angle, and the angle is less than 90°, wherein one surface abuts against the first side surface 2241 of the groove structure 224, so it can be seen that the first sealing surface 2311 is formed on the surface, and the other surface abuts against the edge portion 211 of the end cover 21, so that the first sealing body 2313 is crimped between the edge portion 211 and the first side surface 2241, and the first sealing member 231 can be prepared by elastic material, such as silicone, rubber, etc.

[0087] In this example, the first sealing body 2313 is extended along the first side surface 2241, so that the first sealing surface 2311 is formed on a surface of the sheet-like first sealing body 2313, so that the first sealing surface 2311 can fit tightly with the first side surface 2241. After the edge portion 211 of the end cover 21 is inserted into the groove structure 224, the edge portion 211 squeezes the first sealing member 231, so that the first sealing surface 2311 fits more closely with the first side surface 2241, thereby improving the sealing performance.

[0088] In some examples, as shown in FIG. 4 , the second sealing member 232 includes a second sealing body 2323 extending along the bottom surface 2243 and forming a second sealing surface 2321 abutting against the bottom surface 2243 , and the edge portion 211 abuts against a side of the second sealing body 2323 facing away from the second sealing surface 2321 .

[0089] Specifically, the second sealing body 2323 extends along the bottom surface 2243 into a sheet shape, and the second sealing body 2323 has two surfaces disposed opposite to each other, the second sealing surface 2321 is formed on one surface of the second sealing body 2323, and the other surface of the second sealing body 2323 abuts against the edge portion 211. The second sealing body 2323 is formed in an annular sheet shape surrounding the axial direction X of the open opening 225, and the thickness direction of the second sealing body 2323 is perpendicular to the bottom surface 2243 direction.

[0090] The second sealing body 2323 is independent of the first sealing body 2313 . The second sealing body 2323 and the first sealing body 2313 may be disposed in contact with each other, or the second sealing body 2323 and the first sealing body 2313 may be spaced apart from each other to form a spacing space as described below.

[0091] In this example, the second sealing body 2323 is squeezed between the edge portion 211 and the bottom surface 2243, and the second sealing body 2323 is set at a first angle a with the first sealing body 2313, that is, the second sealing body 2323 is set at an angle with the vibration direction. Therefore, it can be seen that the component force generated by the vibration in the direction perpendicular to the second sealing body 2323 will be reduced, and the component force generated by the vibration will not easily cause the second sealing body 2323 and the bottom surface 2243 to separate, thereby achieving the effect of improving the sealing performance.

[0092] In some examples, reference Figure 5 , Figure 7 and Figure 9-15 As shown, the second sealing member 232 further includes a third sealing body 2324 , which is extended along the second side surface 2242 and forms a third sealing surface 2322 abutting against the second side surface 2242 , and the edge portion 211 abuts against the third sealing body 2324 .

[0093] Specifically, the third sealing body 2324 extends along the second side surface 2242 into a sheet shape. The third sealing body 2324 has two opposite side surfaces. The third sealing surface 2322 is formed on one surface of the third sealing body 2324 . The other surface of the third sealing body 2324 abuts against the edge portion 211 .

[0094] Since the third sealing body 2324 is located between the edge portion 211 of the end cover 21 and the second side surface 2242, and the third sealing body 2324 needs to avoid the open opening 225, it can be seen that the third sealing body 2324 is annular with a through hole formed in the cross section perpendicular to the thickness direction as the center, and the third sealing body 2324 has two opposite surfaces, and the two surfaces can be arranged in parallel or at an angle, and the angle is less than 90°, wherein one surface abuts against the second side surface 2242 of the groove structure 224, so it can be seen that the third sealing surface 2322 is formed on this surface, and the other surface abuts against the edge portion 211 of the end cover 21, so that the third sealing body 2324 is crimped between the edge portion 211 and the second side surface 2242, and the fourth sealing member can be prepared by elastic material, such as silicone, rubber, etc.

[0095] One side (or one end) of the third sealing body 2324 close to the bottom surface 2243 is connected to one side (or one end) of the second sealing body 2323 close to the second side surface 2242 . The third sealing body 2324 and the second sealing body 2323 can be integrally formed or detachably connected.

[0096] Since the second side surface 2242 and the bottom surface 2243 are arranged at a second angle β, the first angle a and the second angle β may be the same or different, that is, the first side surface 2241 may be arranged at an angle with the second side surface 2242, or the first side surface 2241 and the second side surface 2242 may be arranged in parallel.

[0097] When the first side surface 2241 and the second side surface 2242 are arranged in parallel, the third sealing surface 2322 abuts against the second side surface 2242. It can be seen that the third sealing surface 2322 is parallel to the first sealing surface 2311. When the vibration direction is perpendicular to the first sealing surface 2311, that is, perpendicular to the third sealing surface 2322, the third sealing surface 2322 and the second side surface 2242 are easily separated. However, since the first side surface 2241 and the second side surface 2242 are relatively arranged on both sides of the bottom surface 2243, the first sealing member 231 and the second sealing member 232 are respectively located between the first side surface 2241 and the second side surface 2242. Therefore, it can be seen that when vibration occurs, the first sealing member 231 and the second sealing member 232 are respectively located between the first side surface 2241 and the second side surface 2242. When both the first sealing surface 2311 and the second sealing component 232 move in a direction away from the first side surface 2241, when the first sealing surface 2311 is separated from the first side surface 2241, the extrusion and abutment force between the third sealing surface 2322 and the second side surface 2242 increases, thereby enhancing the sealing performance between the third sealing surface 2322 and the second side surface 2242; when the first sealing component 231 and the second sealing component 232 move in a direction close to the first side surface 2241, when the third sealing surface 2322 is separated from the second side surface 2242, the extrusion and abutment force between the first sealing surface 2311 and the first side surface 2241 increases, thereby enhancing the sealing performance between the first sealing surface 2311 and the first side surface 2241. It can be seen that the sealing effect between the third sealing surface 2322 and the second side surface 2242 can cooperate with the sealing effect between the first sealing surface 2311 and the first side surface 2241, thereby achieving the effect of improving the sealing effect.

[0098] In addition, when the first side surface 2241 and the second side surface 2242 are arranged at an angle, the third sealing surface 2322 abuts against the second side surface 2242. It can be seen that the third sealing surface 2322 and the first sealing surface 2311 are arranged at an angle. When the direction of vibration is perpendicular to the first sealing surface 2311, the angle formed by the vibration direction and the third sealing surface 2322 is not equal to 90°. In this case, the vertical force acting on the third sealing surface 2322 due to vibration is smaller than the vertical force acting on the first sealing surface 2311. In other words, the vibration does not easily separate the third sealing surface 2322 from the second side surface 2242, thereby achieving the effect of improving the sealing performance.

[0099] In this example, the third sealing body 2324 is arranged between the edge portion 211 of the end cover 21 and the second side surface 2242. On the one hand, it can play a sealing role. On the other hand, the third sealing body 2324 is connected to the second sealing body 2323, which can enhance the structural strength of the second sealing member 232 and facilitate positioning and installation in the groove structure 224.

[0100] In some examples, reference Figure 5 , Figure 7 and Fig. 9 As shown, the second sealing member 232 also includes a limiting body 2325, which is connected to the edge of the third sealing body 2324 away from the second sealing body 2323 and extends toward the slot end face of the slot structure 224 to abut against the slot end face of the slot structure 224.

[0101] Specifically, the limiting body 2325 and the third sealing body 2324 can be integrally formed, or connected by bonding, or combined and connected by a connecting assembly. The limiting body 2325 can be made of elastic or rigid materials, such as silicone, rubber, plastic, metal materials, etc.

[0102] The third sealing body 2324 is in the shape of a sheet. In the thickness direction perpendicular to the third sealing body 2324, the third sealing body 2324 has a side (or one end) close to the bottom surface 2243 of the groove structure 224. The third sealing body 2324 also has a side away from the bottom surface 2243 of the groove structure 224. The limiting body 2325 is connected to the side of the third sealing body 2324 away from the bottom surface 2243 of the groove structure 224. The limiting body 2325 extends toward the end face of the slot of the groove structure 224 so as to abut against the end face of the slot of the groove structure 224. It can be understood that the limiting body 2325 extends outward from the connection position with the third sealing body 2324 toward the direction away from the center of the slot 2244 of the groove structure 224 so as to protrude from the surface of the third sealing body 2324 (or the third sealing surface 2322). In other words, the limiting body 2325 protrudes from the surface of the third sealing body 2324 along the thickness direction of the third sealing body 2324, so that a limiting surface 23251 is formed on the limiting body 2325 which can abut against the end face of the slot 2244 of the groove structure 224.

[0103] For example, the limiting body 2325 extends into a sheet shape along a thickness direction perpendicular to the third sealing body 2324, and the limiting body 2325 forms an annular sheet shape surrounding the axial direction X of the open mouth 225. The thickness direction of the limiting body 2325 is perpendicular to the axial direction X of the open mouth 225, and the thickness direction of the third sealing body 2324 is parallel to the axial direction X of the open mouth 225. The limiting body 2325 is arranged perpendicularly to the third sealing body 2324.

[0104] The limiting body 2325 is disposed on the end face of the slot 2244 of the slot structure 224, so that the limiting body 2325 limits the third sealing body 2324 when it moves toward the bottom surface 2243 of the slot structure 224, so that when the edge portion 211 of the end cover 21 is plugged toward the slot structure 224, the limiting body 2325 can limit the third sealing body 2324, so that the position of the second sealing member 232 is not easily moved.

[0105] In this example, a limiting body 2325 is connected to the third sealing body 2324, and the limiting body 2325 abuts against the end face of the notch 2244 of the groove structure 224, so that the limiting body 2325 limits the third sealing body 2324. When the edge portion 211 of the end cover 21 is inserted into the groove structure 224, the limiting body 2325 is blocked on the end face of the notch 2244, so that the third sealing body 2324 is not easy to move toward the bottom surface 2243, the position of the second sealing component 232 is more stable, and the sealing effect is improved.

[0106] In some examples, reference Figure 4 , Figure 5 , Figure 7 and Fig. 9 As shown, the second sealing member 232 further includes a fourth sealing body 2326 , which is extended along the first side surface 2241 and forms a fourth sealing surface 2327 abutting against the first side surface 2241 , and the edge portion 211 abuts against the fourth sealing body 2326 .

[0107] Specifically, the fourth sealing body 2326 extends along the first side surface 2241 into a sheet shape. The fourth sealing body 2326 has two opposite side surfaces. The fourth sealing surface 2327 is formed on one surface of the fourth sealing body 2326 . The other surface of the fourth sealing body 2326 abuts against the edge portion 211 .

[0108] Since the fourth sealing body 2326 is located between the edge portion 211 of the end cover 21 and the first side surface 2241, the fourth sealing body 2326 is connected to the second sealing body 2323, and the edge of the fourth sealing body 2326 away from the second sealing body 2323 can be abutted against or spaced apart from the first sealing body 2313; the fourth sealing body 2326 has two opposite surfaces, and the two surfaces can be arranged in parallel or at an angle less than 90°, wherein one surface abuts against the first side surface 2241 of the groove structure 224, so it can be known that the fourth sealing surface 2327 is formed on the surface, and the other surface abuts against the edge portion 211 of the end cover 21, so that the fourth sealing body 2326 is crimped between the edge portion 211 and the first side surface 2241, and the fourth sealing body 2326 can be made of elastic material, such as silicone, rubber, etc.

[0109] One side (or one end) of the fourth sealing body 2326 close to the bottom surface 2243 is connected to one side (or one end) of the second sealing body 2323 close to the first side surface 2241 . The fourth sealing body 2326 and the second sealing body 2323 can be integrally formed or detachably connected.

[0110] For the second seal 232, the fourth sealing surface 2327 abuts against the first side surface 2241, and for the first seal 231, the first sealing surface 2311 abuts against the first side surface 2241. It can be seen that at the position of the first side surface 2241, both the first seal 231 and the second seal 232 have a sealing effect. When vibration occurs, the first seal 231 and the second seal 232 are two independent components, and the first seal 231 and the second seal 232 have different movements relative to the first side surface 2241. Therefore, when the first sealing surface 2311 is separated from the first side surface 2241, the fourth sealing surface 2327 will exist in the case of abutting against the first side surface 2241. Therefore, by adding the fourth sealing surface 2327, the reliability of the seal can be further improved.

[0111] In this example, the fourth sealing body 2326 is arranged between the edge portion 211 of the end cover 21 and the first surface side. On the one hand, it can play a sealing role. On the other hand, the fourth sealing body 2326 is connected to the second sealing body 2323, which can enhance the structural strength of the second sealing member 232 and facilitate positioning and installation in the groove structure 224. On the other hand, the fourth sealing surface 2327 on the fourth sealing body 2326 abuts against the first side surface 2241, which can improve the sealing effect.

[0112] In some examples, reference Figure 12-15 As shown, the first sealing member 231 further includes a fifth sealing body 2315 , which is connected to an edge of the first sealing body 2313 close to the bottom surface 2243 and extends outwardly toward the center of the bottom surface 2243 to form a fifth sealing surface 2312 abutting against the bottom surface 2243 .

[0113] Specifically, the fifth sealing body 2315 and the first sealing body 2313 can be integrally formed, or connected by bonding, or combined and connected by a connecting assembly. The fifth sealing body 2315 can be made of elastic or rigid materials, such as silicone, rubber, plastic, metal materials, etc.

[0114] The fifth sealing body 2315 extends along the bottom surface 2243 into a sheet shape. In the thickness direction perpendicular to the first sealing body 2313, the first sealing body 2313 has a side (or one end) close to the bottom surface 2243 of the groove structure 224. The first sealing member 231 also has a side away from the bottom surface 2243 of the groove structure 224. The fifth sealing body 2315 is connected to the side of the bottom surface 2243 of the first sealing member 231 close to the groove structure 224. The fifth sealing body 2315 extends outwardly from the connection position with the first sealing body 2313 toward the center of the bottom surface 2243 to protrude from the surface of the first sealing body 2313 (i.e., the surface opposite to the first sealing surface 2311). In other words, the fifth sealing body 2315 protrudes from the surface of the first sealing body 2313 along the thickness direction of the first sealing body 2313, so that the third sealing surface 2322 capable of abutting against the bottom surface 2243 is formed on the fifth sealing body 2315.

[0115] For example, the fifth sealing body 2315 extends into a sheet shape along a thickness direction perpendicular to the first sealing body 2313, and the fifth sealing body 2315 forms an annular sheet surrounding the axial direction X of the open mouth 225. The thickness direction of the fifth sealing body 2315 is perpendicular to the axial direction X of the open mouth 225, and the thickness direction of the first sealing body 2313 is parallel to the axial direction X of the open mouth 225. The fifth sealing body 2315 is arranged perpendicular to the first sealing body 2313.

[0116] The fifth sealing surface 2312 is independent of the first sealing surface 2311. Since the first side surface 2241 and the bottom surface 2243 are set at the first angle a, the first sealing surface 2311 abuts against the first side surface 2241, and the fifth sealing surface 2312 abuts against the bottom surface 2243. Therefore, it can be known that the first sealing surface 2311 and the fifth sealing surface 2312 are set at the first angle a. For example, when the first angle a is 90°, the first sealing surface 2311 is perpendicular to the fifth sealing surface 2312.

[0117] When the external environment of the battery cell 20 generates vibration, and the vibration direction is perpendicular to the first side surface 2241 or the first sealing surface 2311, the vibration may cause the end cover 21 to move relative to the shell 22 in a direction parallel to the vibration direction, causing the first side surface 2241 and the first sealing surface 2311 to separate and generate a gap. However, since the fifth sealing surface 2312 is set at a first angle a with the first sealing surface 2311, that is, the fifth sealing surface 2312 is set at an angle with the vibration direction, it can be known that the component force generated by the vibration in the direction perpendicular to the fifth sealing surface 2312 will be reduced, and the component force generated by the vibration will not easily cause the fifth sealing surface 2312 to separate from the bottom surface 2243, thereby achieving the effect of improving the sealing performance.

[0118] In this example, by setting the fifth sealing body 2315, the fifth sealing surface 2312 is formed on the fifth sealing body 2315, and the fifth sealing body 2315 is set at an angle to the first sealing body 2313. When vibration causes the first sealing body 2313 to move relative to the groove structure 224, the third sealing surface 2322 of the fifth sealing body 2315 is not easily separated from the bottom surface 2243, thereby improving the sealing effect.

[0119] In some examples, reference Figure 4 , Figure 5 , Figure 7 , Figure 8 and Figure 10-15 As shown, the first sealing member 231 further includes a positioning body 2314, which is connected to a side of the first sealing body 2313 away from the bottom surface 2243 and extends toward the slot end surface of the slot structure 224 to abut against the slot end surface of the slot structure 224.

[0120] Specifically, the positioning body 2314 and the first sealing body 2313 can be integrally formed, or connected by bonding, or combined and connected by a connecting assembly. The positioning body 2314 can be made of elastic or rigid materials, such as silicone, rubber, plastic, metal materials, etc.

[0121] The first sealing body 2313 is in the shape of a sheet. In the thickness direction perpendicular to the first sealing body 2313 , the first sealing body 2313 has a side (or one end) close to the bottom surface 2243 of the groove structure 224 . The first sealing body 2313 also has a side away from the bottom surface 2243 of the groove structure 224 . The positioning body 2314 is connected to the side of the first sealing body 2313 away from the bottom surface 2243 of the groove structure 224 . The positioning body 2314 extends toward the end face of the slot of the slot structure 224 so as to abut against the end face of the slot of the slot structure 224. It can be understood that the positioning body 2314 extends outward from the connection position with the first sealing body 2313 toward the direction away from the center of the slot 2244 of the slot structure 224 so as to protrude from the surface of the first sealing body 2313 (or the first sealing surface 2311). In other words, the positioning body 2314 protrudes from the surface of the first sealing body 2313 along the thickness direction of the first sealing body 2313, so that a positioning surface 23141 that can abut against the end face of the slot of the slot structure 224 is formed on the positioning body 2314.

[0122] For example, the positioning body 2314 extends into a sheet shape along a thickness direction perpendicular to the first sealing body 2313, and the positioning body 2314 forms an annular sheet shape surrounding the axial direction X of the open mouth 225. The thickness direction of the positioning body 2314 is perpendicular to the axial direction X of the open mouth 225, and the thickness direction of the first sealing body 2313 is parallel to the axial direction X of the open mouth 225. The positioning body 2314 is arranged perpendicular to the first sealing body 2313.

[0123] The positioning body 2314 is blocked on the end face of the groove structure 224, so that the positioning body 2314 forms a limit on the first sealing body 2313 when it moves toward the bottom surface 2243 of the groove structure 224, so that when the edge portion 211 of the end cover 21 is plugged toward the groove structure 224, the positioning body 2314 can limit the first sealing body 2313, so that the position of the first sealing member 231 is not easily moved.

[0124] In this example, a positioning body 2314 is connected to the first sealing body 2313, and the positioning body 2314 abuts against the end face of the groove structure 224, so that the positioning body 2314 limits the first sealing body 2313. When the edge portion 211 of the end cover 21 is inserted into the groove structure 224, the positioning body 2314 is blocked at the end face of the groove, so that the first sealing body 2313 is not easy to move toward the bottom surface 2243, and the position of the first sealing component 231 is more stable, thereby improving the sealing effect.

[0125] In some examples, reference Fig.13 and Fig.16 As shown, the thickness of the positioning body 2314 is d2, the thickness of the first sealing body 2313 is d1, the height of the second sealing body 2323 protruding from the surface of the third sealing body 2324 is d3, and the thickness of the third sealing body 2324 is d4, so that d1=d2=d3=d4=d, thereby making the structural uniformity of the first sealing member 231 and the second sealing member 232 better. In addition, combined with Figure 3 , Figure 5 and Fig.16 As shown, the total height of the battery cell 20 is H, the height of the sealing assembly 23 along the axial direction X of the open opening is h2, and the width of the groove 2244 of the groove structure 224 is h1, then h1=xH, where x□[0.01,0.02], h2=yH, where y□[0.03,0.04], d=zH, where z□[0.02,0.03].

[0126] In some examples, the first seal 231 abuts against the second seal 232 in the groove structure 224 between the housing 22 and the end cover 21 .

[0127] Specifically, refer to Figure 4 As shown, in the case where the first sealing member 231 includes a first sealing body 2313 and the second sealing member 232 includes a second sealing body 2323, the edge of the first sealing body 2313 close to the second sealing body 2323 abuts against the edge of the second sealing body 2323; Fig.12 and Fig.13As shown, when the first sealing member 231 includes the first sealing body 2313 and the fifth sealing body 2315, and the second sealing member 232 includes the second sealing body 2323, the edge of the fifth sealing body 2315 close to the second sealing body 2323 abuts against the edge of the second sealing body 2323; Figure 5 As shown, when the first sealing member 231 includes the first sealing body 2313 and the second sealing member 232 includes the second sealing body 2323 and the fourth sealing body 2326 , the edge of the first sealing body 2313 close to the fourth sealing body 2326 abuts against the edge of the fourth sealing body 2326 .

[0128] In this example, the first seal 231 and the second seal 232 are abutted against each other, which can reduce the deformation problem of the first seal 231 and the second seal 232 when the edge portion 211 of the end cover 21 is plugged into the groove structure 224, which is beneficial to improving the stability of the overall structure.

[0129] In some examples, a gap space 24 is formed between the first seal 231 and the second seal 232 in the groove structure 224 between the housing 22 and the end cover 21 .

[0130] Specifically, when the first sealing member 231 includes the first sealing body 2313 and the second sealing member 232 includes the second sealing body 2323, the edge of the first sealing body 2313 close to the second sealing body 2323 is spaced from the edge of the second sealing body 2323 to form a gap space 24; Fig.14 and Fig.15 As shown, when the first sealing member 231 includes a first sealing body 2313 and a fifth sealing body 2315, and the second sealing member 232 includes a second sealing body 2323, the edge of the fifth sealing body 2315 close to the second sealing body 2323 is spaced from the edge of the second sealing body 2323 to form a gap space 24; Fig.10 and Fig.11 As shown, when the first sealing member 231 includes a first sealing body 2313 and the second sealing member 232 includes a second sealing body 2323 and a fourth sealing body 2326 , an edge of the first sealing body 2313 close to the fourth sealing body 2326 is spaced from an edge of the fourth sealing body 2326 to form a gap space 24 .

[0131] In this example, the gap space 24 is used to extend the first seal 231 and the second seal 232 when they are squeezed, thereby reducing the resistance of the first seal 231 and the second seal 232 when the edge portion 211 of the end cover 21 is inserted into the groove structure 224, so that the edge portion 211 can be inserted into the groove structure 224 more smoothly, thereby improving the convenience of assembling the end cover 21 and the shell 22.

[0132] In some examples, reference Figure 3 As shown, the shell 22 includes a main body portion 222 and an assembly portion 221. The main body portion 222 forms at least a portion of the inner cavity 223. The assembly portion 221 is connected to the main body portion 222 and surrounds a portion of the inner cavity 223. An opening 225 is formed in the assembly portion 221. The groove structure 224 is opened on the cavity wall of the inner cavity 223 of the assembly portion 221 near the opening 225.

[0133] Specifically, the body 222 is a part of the housing 22 , and the exterior of the body 222 can be in various shapes, such as a cylinder, a cuboid, etc. The interior of the body 222 forms a part of the inner cavity 223 , and the battery cell is mainly accommodated in the inner cavity 223 .

[0134] The assembly part 221 is connected to the main body 222. The assembly part 221 is mainly used to form the open end of the shell 22, so that the end cover 21 can be directly connected to the assembly part 221. An open mouth 225 is formed on the assembly part 221. The exterior of the assembly part 221 can have a variety of shapes, such as a cylinder, etc., wherein the cylinder can be a cylindrical body, and the cylinder wall of the cylindrical body forms a connection surface connected to the edge part 211, and the groove structure 224 is opened on the connection surface. The assembly part 221 is surrounded by the axial direction X of the open mouth 225 to form a partial inner cavity 223, and the partial inner cavity 223 is connected with the above-mentioned partial inner cavity 223 to form the inner cavity 223 of the entire shell 22. Part of the battery cell solubles are in the partial inner cavity 223, so that the groove structure 224 is opened on the cavity wall of the inner cavity 223 of the assembly part 221 and is arranged close to the open mouth 225, so that the end cover 21 can enter the partial inner cavity 223 from the open mouth 225 and can be easily plugged and matched with the groove structure 224.

[0135] The assembly part 221 can be connected to the main body 222 in a detachable manner, or connected to the main body 222 in a fixed manner such as welding; of course, the assembly part 221 and the main body 222 can also be prepared in an integral molding manner.

[0136] In this example, the shell 22 is provided with an assembly part 221, so that the groove structure 224 is separately provided on the assembly part 221, and the assembly part 221 is independent of the main body 222, so that the assembly part 221 and the main body 222 can be connected in a detachable manner, so that when the assembly part 221 is damaged, it is convenient to replace it separately, and the main body 222 can continue to be used, so as to reduce costs.

[0137] In a specific embodiment, referring to Figure 6-11As shown, a battery cell 20 includes a battery cell and a shell assembly, the shell assembly includes a shell 22, an end cover 21 and a sealing assembly 23; the shell 22 has an inner cavity 223 and an open opening 225, a groove structure 224 is formed on the cavity wall of the inner cavity 223 near the open opening 225, the groove structure 224 is arranged to extend around the axial direction X of the open opening 225, the groove structure 224 has a bottom surface 2243, a first side surface 2241 and a second side surface 2242, along the axial direction X of the open opening 225, the first side surface 2241 and the second side surface 2242 are respectively located on both sides of the bottom surface 2243; the end cover 21 has an edge portion 211, the edge portion 211 is plugged into the groove structure 224; the sealing assembly 23 The sealing assembly 23 includes a first sealing member 231 and a second sealing member 232. The first sealing member 231 has a first sealing surface 2311, which is in contact with the first side surface 2241. The second sealing member 232 has a second sealing surface 2321, which is in contact with the bottom surface 2243. The first sealing member 231 includes a first sealing body 2313, which is extended along the first side surface 2241 and forms a first sealing surface 2311. The edge portion 211 is in contact with a side of the first sealing body 2313 that is opposite to the first sealing surface 2311. The second sealing member 232 includes a second sealing body 2323, the second sealing body 2323 is extended along the bottom surface 2243 to form a second sealing surface 2321 abutting against the bottom surface 2243, and the edge portion 211 abuts against the side of the second sealing body 2323 facing away from the second sealing surface 2321; the second sealing member 232 also includes a third sealing body 2324, the third sealing body 2324 is extended along the second side surface 2242 to form a third sealing surface 2322 abutting against the second side surface 2242, and the edge portion 211 abuts against the third sealing body 2324; the second sealing member 232 also includes a limiting body 2325, the limiting body 2325 is connected to the edge of the third sealing body 2324 away from the second sealing body 2323, and faces It is extended outward in a direction away from the center of the notch 2244 of the groove structure 224 to abut against the end face of the notch of the groove structure 224; the second sealing member 232 also includes a fourth sealing body 2326, which is extended along the first side surface 2241 and forms a fourth sealing surface 2327 abutting against the first side surface 2241, and the edge portion 211 abuts against the fourth sealing body 2326; the first sealing member 231 also includes a positioning body 2314, which is connected to a side of the first sealing body 2313 away from the bottom surface 2243 and is extended outward in a direction away from the center of the notch 2244 of the groove structure 224 to abut against the end face of the notch of the groove structure 224.

[0138] Based on the above-mentioned battery cell 20, the present application also proposes an example of a battery 100. Figure 2As shown, the battery 100 includes a battery cell 20 as described in any of the above examples.

[0139] The battery 100 in this example includes a box body 10 and a battery cell 20, and the battery cell 20 is installed in the box body 10. The battery 100 may include one battery cell 20 as described above, or the battery 100 may include multiple battery cells 20. When multiple battery cells 20 as described above are provided in the battery 100, the multiple battery cells 20 may be arranged according to a preset rule. The multiple battery cells 20 may be arranged in a row of multiple columns or multiple rows of multiple columns. The multiple battery cells 20 may be connected in series, in parallel, or in series-parallel hybrid.

[0140] It is understandable that in this example, only the battery 100 including the above-mentioned battery cell 20 is described, and the battery 100 may also include other functional components, which will not be described in detail.

[0141] The example of the battery 100 in the present application is based on the example of the battery cell 20 described above. The example of the battery 100 includes all the technical effects of the example of the battery cell 20 described above, which will not be described in detail.

[0142] In some examples, combined Figure 1 As shown, an example of an electrical device is disclosed, and the electrical device includes the battery cell 20 described in any of the above examples, or the battery 100 in any of the above examples.

[0143] The electrical devices in this example include, but are not limited to: mobile phones, portable devices, laptop computers, electric vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc. The battery cell 20 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.

[0144] The examples of the electrical device in the present application are based on the examples of the battery cell 20 or the battery 100 described above, and the examples of the electrical device include all the technical effects of the examples of the battery cell 20 or the battery 100 described above, which will not be repeated.

[0145] 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 battery cell, characterized in that: It includes a battery cell and a housing component, wherein the housing component includes: A shell having an inner cavity and an open opening, wherein the battery cell is accommodated in the inner cavity, and a groove structure is formed on the cavity wall of the inner cavity near the open opening, wherein the groove structure is arranged to extend around the axial direction of the open opening, and wherein the groove structure has a first side surface, a bottom surface, and a second side surface connected in sequence, along the axial direction of the open opening; An end cover having an edge portion, wherein the edge portion is inserted into the groove structure; A sealing component is arranged between the edge portion and the groove structure; the sealing component includes a first sealing member and a second sealing member which are independent of each other, the first sealing member has a first sealing surface which abuts against the first side surface, and the second sealing member has a second sealing surface which abuts against the bottom surface.

2. The battery cell according to claim 1, characterized in that: The first sealing member includes a first sealing body, which is extended along the first side surface and forms the first sealing surface. The edge portion abuts against a side surface of the first sealing body which is opposite to the first sealing surface.

3. The battery cell according to claim 2, characterized in that: The second sealing member includes a second sealing body, which is extended along the bottom surface and forms the second sealing surface abutting against the bottom surface, and the edge portion abuts against a side surface of the second sealing body which is opposite to the second sealing surface.

4. The battery cell according to claim 3, characterized in that: The second sealing member further includes a third sealing body, which is extended along the second side surface and forms a third sealing surface abutting against the second side surface, and the edge portion abuts against the third sealing body.

5. The battery cell according to claim 4, characterized in that: The second sealing member further includes a limiting body, which is connected to an edge of the third sealing body away from the second sealing body and extends toward a notch end surface of the groove structure to abut against the notch end surface of the groove structure.

6. The battery cell according to claim 4, characterized in that: The second sealing member further includes a fourth sealing body, which is extended along the first side surface and forms a fourth sealing surface abutting against the first side surface, and the edge portion abuts against the fourth sealing body.

7. The battery cell according to claim 2, characterized in that: The first sealing member further includes a fifth sealing body, which is connected to an edge of the first sealing body close to the bottom surface and extends outwardly toward the center of the bottom surface to form a fifth sealing surface abutting against the bottom surface.

8. The battery cell according to claim 2, characterized in that: The first sealing member further includes a positioning body, which is connected to a side of the first sealing body away from the bottom surface and extends toward a notch end surface of the groove structure to abut against the notch end surface of the groove structure.

9. The battery cell according to any one of claims 1 to 8, characterized in that: The first sealing member abuts against the second sealing member in the groove structure between the housing and the end cover.

10. The battery cell according to any one of claims 1 to 8, characterized in that: A gap space is formed between the first seal and the second seal in the groove structure between the housing and the end cover.

11. The battery cell according to any one of claims 1 to 8, characterized in that: The shell includes a main body and an assembly part, the main body forms at least part of the inner cavity, the assembly part is connected to the main body and surrounds part of the inner cavity, the opening is formed in the assembly part, and the groove structure is opened on the cavity wall of the inner cavity of the assembly part close to the opening.

12. A battery, characterized in that: The invention comprises a battery cell as claimed in any one of claims 1 to 11.

13. An electrical device, characterized in that: Comprising the battery monomer according to any one of claims 1 to 11, or, comprising the battery according to claim 12.

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