Battery, power utilization device and energy storage device

Abstract

The utility model provides a battery, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery comprises a box body, a battery monomer, a gasket and a sleeve, the box body is provided with a containing cavity and a connecting hole, the connecting hole penetrates through the box body in the first direction, and the battery monomers are located in the containing cavity; the gasket comprises a first turnup part and a first connecting part, the first turnup part is connected with one end of the first connecting part, the first turnup part protrudes towards the outer side of the first connecting part, the first connecting part is located in the connecting hole, and the first turnup part is attached to the surface of the box body; the sleeve comprises a second turnup part and a second connecting part, the second turnup part is connected with one end of the second connecting part, the second turnup part protrudes towards the outer side of the second connecting part, the second connecting part penetrates through the first connecting part, and the second turnup part is attached to the first turnup part. According to the battery provided by the invention, the possibility that the sleeve is in contact with the box body can be reduced, the problem that the contact part of the box body and the sleeve is easy to corrode can be improved to a certain extent, and the safety of the battery is improved.

Description

Technical Field

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

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

[0003] The battery includes a battery cell and a box that contains the battery cell. The box is generally connected to other devices through a connector, or when the box includes multiple components, the multiple components can also be connected through a connector. The box is provided with a connection hole, and a sleeve is arranged in the connection hole. The connector passes through the sleeve to connect the box with other devices, or connect multiple components of the box. In the related art, the contact part between the box and the sleeve is prone to corrosion, which affects the stability of the battery. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one purpose of the present application is to provide a battery, an electrical device and an energy storage device to improve the problem that the contact part between the box and the sleeve is prone to corrosion.

[0005] The embodiment of the first aspect of the present application provides a battery, the battery includes a box, a battery cell, a gasket and a sleeve. The box has a accommodating cavity and a connecting hole, the connecting hole penetrates the box along a first direction, and the battery cell is located in the accommodating cavity; the gasket includes a first flange portion and a first connecting portion, the first flange portion is connected to one end of the first connecting portion, the first flange portion protrudes to the outside of the first connecting portion, the first connecting portion is located in the connecting hole, and the first flange portion is in contact with the surface of the box; the sleeve includes a second flange portion and a second connecting portion, the second flange portion is connected to one end of the second connecting portion, the second flange portion protrudes to the outside of the second connecting portion, the second connecting portion penetrates the first connecting portion, and the second flange portion is in contact with the first flange portion.

[0006] In the technical solution of the embodiment of the present application, the first flange portion separates the box body from the second flange portion, and the first connecting portion separates the box body from the second connecting portion. The gasket can reduce the possibility of contact between the sleeve and the box body, thereby reducing the risk of corrosion of the box body and improving the stability of the battery.

[0007] In some embodiments, the second connection portion is connected to the first connection portion. This can reduce the possibility of mutual movement between the sleeve and the gasket, and enhance the stability of the installation between the sleeve and the gasket. Since the connecting member passes through the sleeve and is connected to the sleeve, when the connecting member shakes, the connecting member will drive the sleeve to shake. The sleeve is connected to the gasket, and since the gasket fits the box, the gasket can limit the shaking of the sleeve, thereby limiting the shaking of the connecting member and improving the stability of the connection through the connecting member.

[0008] In some embodiments, the outer wall of the second connection part has a groove, and the bottom surface of the groove approaches the middle part of the second connection part from the direction close to the second flange part to the direction away from the second flange part; at least part of the first connection part is located in the groove. The second connection part has a groove structure, and the first connection part is located in the groove. The first connection part and the groove form a limiting structure to realize the clamping connection between the first connection part and the second connection part. The first connection part and the second connection part are connected more simply through this structure.

[0009] In some embodiments, the groove surrounds the second connection part along the circumference of the second connection part. The groove is arranged around the second connection part, so that the limiting structure formed by the first connection part and the second connection part can be arranged around the second connection part, strengthening the connection between the sleeve and the gasket and improving the stability of the connection between the sleeve and the gasket.

[0010] In some embodiments, along the first direction, the side wall of the groove close to the second flange portion overlaps with the side wall of the second flange portion close to the groove. The side wall of the second flange portion close to the groove is reused as the inner side wall of the groove, which not only facilitates the manufacturing of the groove, but also facilitates the installation and matching use between the sleeve and the gasket, and at the same time can make the connection between the second connection portion and the first connection portion more secure.

[0011] In some embodiments, the outer wall of the second connection part is fitted with the inner wall of the first connection part, one of the outer wall of the second connection part and the inner wall of the first connection part has a mounting groove, and the other of the outer wall of the second connection part and the inner wall of the first connection part has a mounting protrusion, and the mounting protrusion is located in the mounting groove. By connecting by setting the mounting protrusion and the mounting groove, the position and volume of the mounting protrusion and the mounting groove can be set according to requirements, so that the space occupied by the mounting protrusion and the mounting groove on the second connection part or the first connection part is reduced, and the production of the sleeve and the gasket is not affected.

[0012] In some embodiments, the outer wall of the second connection portion has a plurality of mounting grooves, and the plurality of mounting grooves are arranged at intervals along the circumference of the second connection portion, and the inner wall of the first connection portion has a plurality of mounting protrusions, and the plurality of mounting protrusions correspond to the plurality of mounting grooves one by one. The plurality of mounting grooves are arranged at intervals along the circumference of the second connection portion, so that the limiting structure formed by the plurality of mounting protrusions and the plurality of mounting grooves can be arranged around the second connection portion, and the limiting structure is more evenly distributed, thereby improving the stability of the connection between the sleeve and the gasket.

[0013] In some embodiments, the outer wall of the second connection part has an external thread, the inner wall of the first connection part has an internal thread, and the first connection part is threadedly connected to the second connection part. The connection method between the second connection part and the first connection part is simple and easy to disassemble, which facilitates the disassembly of the sleeve and the gasket.

[0014] In some embodiments, the orthographic projection of the second flange portion in the first projection plane is located within the orthographic projection of the first flange portion in the first projection plane, and the first projection plane is perpendicular to the first direction. The first flange portion separates the second flange portion from the box body, and the projection surface of the first flange portion is larger, which can further reduce the possibility of the second flange portion contacting the box body, thereby reducing the risk of corrosion of the box body.

[0015] In some embodiments, along the first direction, the length of the first connection portion is less than the length of the second connection portion. For a box body made of non-metallic material, the material of the middle part of the box body is not prone to corrosion, that is, the material of the box body corresponding to the middle part of the connection hole is not prone to corrosion, and the box body corresponding to the middle part of the connection hole does not need to be separated from the sleeve by a gasket. The shorter the length of the first connection portion, the less material the gasket needs to be, saving costs.

[0016] In some embodiments, the gasket is made of aluminum or titanium alloy. The gasket made of aluminum or titanium alloy can reduce the risk of potential difference corrosion when it contacts the box made of carbon fiber material, thereby improving the reliability of the battery.

[0017] In some embodiments, the sleeve is made of steel. A sleeve made of steel is arranged between the connector and the housing, and the sleeve is connected to the housing through a gasket, so that the hardness difference between the connector and the sleeve is reduced. The sleeve made of steel can provide a rigid connection interface for the connector and the housing, thereby improving the stability of the connection between the connector and the housing.

[0018] In some embodiments, the gasket is bonded to the box body. The bonding connection between the gasket and the box body can improve the stability of the connection between the two and reduce the possibility of the gasket and the sleeve shaking in the connection hole to a certain extent.

[0019] An embodiment of the second aspect of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0020] An embodiment of the third aspect of the present application provides an energy storage device, which includes the battery in the above embodiment, and the battery is used to store electrical energy.

[0021] 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

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0023] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0024] Figure 2 An axonometric diagram of another battery provided in an embodiment of the present application;

[0025] Figure 3 A schematic diagram of the structure of a sleeve provided in an embodiment of the present application;

[0026] Figure 4 A half-section schematic diagram of a sleeve provided in an embodiment of the present application;

[0027] Figure 5 A schematic diagram of the structure of a gasket provided in an embodiment of the present application;

[0028] Figure 6 A half-section schematic diagram of a gasket provided in an embodiment of the present application;

[0029] Figure 7 A cross-sectional schematic diagram of the cooperation between a sleeve and a gasket provided in an embodiment of the present application;

[0030] Figure 8 A schematic diagram of the structure of another sleeve provided in an embodiment of the present application;

[0031] Fig. 9 A half-section schematic diagram of another sleeve provided in an embodiment of the present application;

[0032] Fig.10 A schematic diagram of the structure of another gasket provided in an embodiment of the present application;

[0033] Fig.11 A half-section schematic diagram of another gasket provided in an embodiment of the present application;

[0034] Fig.12 A cross-sectional schematic diagram of another sleeve and gasket cooperation provided in an embodiment of the present application;

[0035] Fig.13 A cross-sectional schematic diagram of another type of sleeve and gasket cooperation provided in an embodiment of the present application.

[0036] Description of reference numerals:

[0037] 10. Box body; 11. Accommodating cavity; 12. Connecting hole; 20. Battery cell; 30. Gasket; 31. First flange portion; 32. First connecting portion; 40. Sleeve; 41. Second flange portion; 42. Second connecting portion; 421. Groove; 422. Mounting groove; 321. Mounting protrusion; First direction X. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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).

[0044] 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.

[0045] 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.

[0046] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0047] The battery box has a connecting hole, in which a sleeve is arranged. During the assembly process of the box, a connecting piece passes through the sleeve to connect the box with other devices, or connects multiple parts of the box. For example, the connecting piece may include a bolt.

[0048] During the use of the battery, there may be induced voltage in the sleeve. If the box is in contact with the sleeve for a long time, it is easy to cause corrosion of the box and affect the stability of battery use.

[0049] Based on the above considerations, an embodiment of the present application provides a battery, which includes a case, a battery cell, a gasket and a sleeve. The case has a housing and a connection hole, the connection hole penetrates the case along a first direction, and the battery cell is located in the housing; the gasket includes a first flange portion and a first connection portion, the first flange portion is connected to one end of the first connection portion, the first flange portion protrudes to the outside of the first connection portion, the first connection portion is located in the connection hole, and the first flange portion is in contact with the surface of the case; the sleeve includes a second flange portion and a second connection portion, the second flange portion is connected to one end of the second connection portion, the second flange portion protrudes to the outside of the second connection portion, the second connection portion penetrates the first connection portion, and the second flange portion is in contact with the first flange portion. By arranging a gasket on the periphery of the sleeve, when in use, the possibility of direct contact between the sleeve and the connector in the sleeve and the case is reduced, which can improve the problem of corrosion at the contact portion between the case and the sleeve to a certain extent, and improve the safety of the battery.

[0050] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. The battery disclosed in the present application can be used to form a power supply system of the electrical device, which is conducive to reducing the risk of box corrosion and improving the reliability and stability of the battery.

[0051] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0052] The present application embodiment provides a battery, Figure 1 A schematic diagram of a battery structure provided in an embodiment of the present application is shown in FIG. Figure 1 The battery includes a box body 10 and a battery cell 20 . The box body 10 has a receiving cavity 11 . The battery cell 20 is located in the receiving cavity 11 . Figure 2 For another isometric view of a battery provided in an embodiment of the present application, see Figure 2 The box body 10 also has a connection hole 12, and the connection hole 12 passes through the box body 10 along the first direction X. The battery also includes a gasket 30. The battery also includes a sleeve 40 ( Figure 2 not shown).

[0053] Figure 3 A schematic diagram of the structure of a sleeve provided in an embodiment of the present application is shown in FIG. Figure 4 A half-section schematic diagram of a sleeve provided in an embodiment of the present application, see Figure 3 and Figure 4The sleeve 40 includes a second flange portion 41 and a second connecting portion 42 . The second flange portion 41 is connected to one end of the second connecting portion 42 , and the second flange portion 41 protrudes outward from the second connecting portion 42 .

[0054] Figure 5 A schematic diagram of the structure of a gasket provided in an embodiment of the present application is shown in FIG. Figure 6 A half-section schematic diagram of a gasket provided in an embodiment of the present application, see Figure 5 and Figure 6 The gasket 30 includes a first flange portion 31 and a first connecting portion 32. The first flange portion 31 is connected to one end of the first connecting portion 32, and the first flange portion 31 protrudes outward from the first connecting portion 32. Figure 2 , Figure 5 and Figure 6 The first connecting portion 32 is located in the connecting hole 12 , and the first flange portion 31 is in contact with the surface of the box body 10 .

[0055] Figure 7 A cross-sectional schematic diagram of a sleeve and a gasket provided in an embodiment of the present application, see Figure 7 The second connection portion 42 passes through the first connection portion 32 , and the second flange portion 41 is in contact with the first flange portion 31 .

[0056] In some embodiments, the box 10 includes a frame, a top wall and a bottom wall. The frame is a hollow structure with two openings at both ends. The top wall and the bottom wall cover the two opening ends of the frame respectively. For example, the frame can be a cylinder or a cuboid with two openings at both ends. The connecting hole 12 can pass through any one or more of the frame, the top wall and the bottom wall. For example, the connecting hole 12 can pass through the frame and the top wall, the sleeve 40 is located in the connecting hole 12, and the connecting member passes through the sleeve 40 to connect the frame and the top wall; or the connecting hole 12 can pass through any one of the frame, the top wall and the bottom wall, and the connecting member passes through other devices and then passes through the sleeve 40 in the connecting hole 12 to connect the box and other devices.

[0057] In other embodiments, the box 10 includes a first part and a second part that jointly define a receiving cavity for accommodating the battery cell 20. The second part can be a hollow structure with an opening at one end, and the first part can be a plate-like structure. The first part covers the open side of the second part, so that the first part and the second part jointly define the receiving cavity; the first part and the second part can also be hollow structures with an opening at one side, and the open side of the first part covers the open side of the second part. Of course, the box 10 formed by the first part and the second part can be in a variety of shapes, such as a cylinder, a cuboid, etc. The connecting hole 12 can pass through any one or both of the first part and the second part. For example, the connecting hole 12 can pass through the first part and the second part, the sleeve 40 is located in the connecting hole 12, and the connecting member passes through the sleeve 40 to connect the first part and the second part; or the connecting hole 12 can pass through any one of the first part and the second part, and the connecting member passes through the other device and then passes through the sleeve 40 in the connecting hole 12 to connect the box and other devices.

[0058] Illustratively, the connecting members may be bolts and nuts.

[0059] In some embodiments, the shape of the accommodating cavity 11 can be various, and the shape of the accommodating cavity 11 can be a cylinder or a cuboid, etc., but the shape of the accommodating cavity 11 is not limited thereto.

[0060] The first direction X is an arbitrary direction, and along the first direction X, the connection hole 12 passes through the box body 10 .

[0061] In some embodiments, the connection hole 12 may have various shapes, such as a cylinder or a cuboid, but the shape of the connection hole 12 is not limited thereto.

[0062] In some embodiments of the present application, the material of the box 10 may be a non-metal material, such as carbon fiber or glass fiber, etc. In other embodiments of the present application, the material of the box 10 may be a metal material.

[0063] A battery cell 20 is the smallest unit that makes up a battery. In a battery, there may be multiple battery cells 20, and multiple battery cells 20 may be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 20 are connected in both series and in parallel.

[0064] Each battery cell 20 may be a secondary battery or a primary battery, or 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.

[0065] In some embodiments, the shape of the gasket 30 and the shape of the sleeve 40 are similar to a “T”-shaped structure.

[0066] In the embodiment of the present application, the gasket 30 is used to separate the sleeve 40 from the box body 10, wherein the first flange portion 31 separates the box body 10 from the second flange portion 41, and the first connecting portion 32 separates the box body 10 from the second connecting portion 42, thereby reducing the contact between the sleeve 40 and the box body 10. Exemplarily, the material of the gasket 30 includes but is not limited to aluminum or titanium alloy.

[0067] In some embodiments, the connection method between the first flange portion 31 and the first connecting portion 32 includes but is not limited to bonding or welding. In other embodiments, the first flange portion 31 and the first connecting portion 32 are integrally formed, for example, the first flange portion 31 is formed at one end of the first connecting portion 32 by a flanging process.

[0068] In the embodiment of the present application, the first connection portion 32 contacts the inner wall of the connection hole 12. In some embodiments, the first flange portion 31 may be connected to the box body 10.

[0069] The sleeve 40 is used to separate the connector from the box 10, and the sleeve 40 provides an installation interface for the connector to improve the installation stability of the connector and the box 10. The material of the sleeve 40 includes but is not limited to steel or aluminum. The sleeve 40 has a through hole for the connector to pass through.

[0070] In some embodiments, the connection method of the second flange portion 41 and the second connecting portion 42 includes but is not limited to bonding or welding. In other embodiments, the second flange portion 41 and the second connecting portion 42 are integrally formed, for example, the second flange portion 41 is formed at one end of the second connecting portion 42 by a flanging process.

[0071] In the embodiment of the present application, the second connection portion 42 contacts the inner wall of the first connection portion 32. In some embodiments, the second connection portion 42 is connected to the first connection portion 32.

[0072] In an embodiment of the present application, the first flange portion 31 separates the box body 10 from the second flange portion 41, and the first connecting portion 32 separates the box body 10 from the second connecting portion 42. The gasket 30 can reduce the possibility of contact between the sleeve 40 and the box body 10, thereby reducing the risk of corrosion of the box body 10 and improving the stability of the battery.

[0073] According to some embodiments of the present application, the second connection portion 42 is connected to the first connection portion 32 .

[0074] The second connection part 42 and the first connection part 32 can be connected in various ways. For example, the second connection part 42 can be connected to the first connection part 32 by bonding, or the second connection part 42 can be threadedly connected to the first connection part 32, or the second connection part 42 can be snap-connected to the first connection part 32, etc.

[0075] In the embodiment of the present application, the gasket 30 is connected to the box body 10 , for example, the gasket 30 is bonded to the box body 10 .

[0076] In the embodiment of the present application, the second connection part 42 is connected to the first connection part 32 to reduce the possibility of mutual movement between the sleeve 40 and the gasket 30, and enhance the installation stability between the sleeve 40 and the gasket 30. Since the connecting member passes through the sleeve 40 and is connected to the sleeve 40, when the connecting member shakes, the connecting member will drive the sleeve 40 to shake. The sleeve 40 is connected to the gasket 30. Since the gasket 30 fits the box 10, the gasket 30 can limit the shaking of the sleeve 40, thereby limiting the shaking of the connecting member and improving the stability of the connection through the connecting member.

[0077] According to some embodiments of the present application, see Figure 3 and Figure 4 The outer wall of the second connecting portion 42 has a groove 421, and from the direction close to the second flange portion 41 to the direction away from the second flange portion 41, the bottom surface of the groove 421 is close to the middle of the second connecting portion 42. Figure 3 , Figure 4 and Figure 7 , at least a portion of the first connecting portion 32 is located in the groove 421 .

[0078] It is understandable that the second connection portion 42 has an inner wall and an outer wall, and the outer wall is provided with a groove 421 that is recessed toward the inner wall. In some embodiments, the shape of the groove 421 includes but is not limited to a trapezoid or other polygons.

[0079] In some embodiments, the direction from close to the second flange portion 41 to far away from the second flange portion 41 is parallel to the first direction X.

[0080] In some embodiments, the groove 421 contacts the first connection portion 32 , and the common contact surface between the two may be one or more.

[0081] In some embodiments, the groove 421 includes a side surface and a bottom surface, and along the direction from close to the second flange portion 41 to away from the second flange portion 41, the distance between the bottom surface and the center line of the second connecting portion 42 or the inner wall of the second connecting portion 42 gradually decreases, and can be gradient-changed, and the side surface is connected to both ends of the bottom surface. In some embodiments of the present application, the side surface is perpendicular to the first direction X.

[0082] In some embodiments, at least a portion of the first connection portion 32 and at least a portion of the first flange portion 31 are both located in the groove 421. In some embodiments, the first connection portion 32 is connected to the second connection portion 42 by snap-fitting. In some embodiments, the first connection portion 32 and the second connection portion 42 are configured as an interference fit to improve the stability of the connection.

[0083] In an embodiment of the present application, the second connection part 42 has a groove 421 structure, the first connection part 32 is located in the groove 421, the first connection part 32 and the groove 421 form a limiting structure to realize the first connection part 32 and the second connection part 42 to be snap-fitted, and the first connection part 32 and the second connection part 42 are connected more simply through this structure.

[0084] According to some embodiments of the present application, see Figure 3 and Figure 4 The groove 421 surrounds the second connecting portion 42 along the circumference of the second connecting portion 42 .

[0085] In the embodiment of the present application, the first connection portion 32 is located in the groove 421 , and the first connection portion 32 also surrounds the second connection portion 42 along the circumference of the second connection portion 42 .

[0086] In some embodiments, part of the first connection portion 32 is located in the groove 421, and part of the first connection portion 32 is located outside the groove 421. In other embodiments, the first connection portion 32 is entirely located in the groove 421.

[0087] In some embodiments of the present application, the second connection portion 42 has a groove 421, and the shape of the groove 421 is annular. Exemplarily, the shape of the first connection portion 32 is also annular, and the annular first connection portion 32 surrounds the second connection portion 42 along the circumference of the second connection portion 42; or the gasket 30 includes a plurality of first connection portions 32, and the plurality of first connection portions 32 are arranged at intervals along the circumference of the second connection portion 42.

[0088] In other embodiments of the present application, the second connection portion 42 has a plurality of grooves 421, and the plurality of grooves 421 surround the second connection portion 42 at circumferential intervals. The gasket 30 includes a plurality of first connection portions 32, and the plurality of first connection portions 32 are located one by one in the plurality of grooves 421, that is, each of the plurality of grooves 421 has a first connection portion 32, and each of the plurality of first connection portions 32 is located in a groove 421.

[0089] In an embodiment of the present application, when the gasket 30 includes an annular first connecting portion 32, the gasket 30 may include an annular first flange portion 31, which surrounds one end of the first connecting portion 32; or the gasket 30 may include multiple first flange portions 31, which are arranged at intervals along the circumference of the first connecting portion 32, and the multiple first flange portions 31 are all connected to one end of the first connecting portion 32.

[0090] In an embodiment of the present application, when the gasket 30 includes multiple first connection portions 32, the gasket 30 may include an annular first flange portion 31, and the multiple first connection portions 32 are arranged at intervals along the circumferential direction of the inner circle of the annular first flange portion 31 and are connected to the inner circle of the annular first flange portion 31; or the gasket 30 may include multiple first flange portions 31, and the multiple first flange portions 31 are connected to the multiple first connection portions 32 one by one, that is, each of the multiple first flange portions 31 is connected to a first connection portion 32, and each of the multiple first connection portions 32 is connected to a first flange portion 31.

[0091] In an embodiment of the present application, the groove 421 is arranged around the second connecting part 42, so that the limiting structure formed by the first connecting part 32 and the second connecting part 42 can be arranged around the second connecting part 42, thereby strengthening the connection between the sleeve 40 and the gasket 30 and improving the stability of the connection between the sleeve 40 and the gasket 30.

[0092] According to some embodiments of the present application, see Figure 3 and Figure 4 , along the first direction X, the side wall of the groove 421 close to the second flange portion 41 overlaps with the side wall of the second flange portion 41 close to the groove 421 .

[0093] That is, the side wall of the second flange portion 41 close to the groove 421 is reused as the inner side wall of the groove 421 .

[0094] In the embodiment of the present application, since the second flange portion 41 is in contact with the first flange portion 31, at least part of the first connection portion 32 is located in the groove 421. The closer the groove 421 is to the second flange portion 41, the more first connection portions 32 fall into the groove 421, and the connection between the second connection portion 42 and the first connection portion 32 is more secure.

[0095] In an embodiment of the present application, the side wall of the second flange portion 41 close to the groove 421 is reused as the inner wall of the groove 421, which not only facilitates the manufacture of the groove 421 and the installation and matching use between the sleeve 40 and the gasket 30, but also makes the connection between the second connection portion 42 and the first connection portion 32 more secure.

[0096] According to some embodiments of the present application, Figure 8 This is a schematic diagram of the structure of another sleeve provided in an embodiment of the present application. Fig. 9 A half-section schematic diagram of another sleeve provided in an embodiment of the present application, Fig.10 A schematic diagram of the structure of another gasket provided in an embodiment of the present application, Fig.11 A half-section schematic diagram of another gasket provided in an embodiment of the present application, Fig.12Another cross-sectional schematic diagram of the sleeve and the gasket provided in the embodiment of the present application is shown in FIG. Figures 8 to 12 The outer wall of the second connecting part 42 is fitted with the inner wall of the first connecting part 32, one of the outer wall of the second connecting part 42 and the inner wall of the first connecting part 32 has a mounting groove 422, and the other of the outer wall of the second connecting part 42 and the inner wall of the first connecting part 32 has a mounting protrusion 321, and the mounting protrusion 321 is located in the mounting groove 422.

[0097] The mounting groove 422 may have various shapes, such as a hemisphere, a cuboid, or a cylinder, etc. The mounting protrusion 321 may have various shapes, such as a sphere, a cuboid, or a cylinder, etc.

[0098] The number of the mounting grooves 422 may be single or multiple, and the number of the mounting protrusions 321 corresponds to the number of the mounting grooves 422 , that is, the number of the mounting protrusions 321 may also be single or multiple.

[0099] It should be noted that Figures 8 to 12 One case is shown, that is, the outer wall of the second connection part 42 has a mounting groove 422, and the inner wall of the first connection part 32 has a mounting protrusion 321. In other implementations, it can be another case, that is, the outer wall of the second connection part 42 has a mounting protrusion 321, and the inner wall of the first connection part 32 has a mounting groove 422.

[0100] In an embodiment of the present application, the connection is achieved by setting a mounting protrusion 321 and a mounting groove 422. The position and volume of the mounting protrusion 321 and the mounting groove 422 can be set as required, so that the space occupied by the mounting protrusion 321 and the mounting groove 422 on the second connecting part 42 or the first connecting part 32 is reduced, and the production of the sleeve 40 and the gasket 30 is not affected.

[0101] According to some embodiments of the present application, the outer wall of the second connecting portion 42 has a plurality of mounting grooves 422 , and the plurality of mounting grooves 422 are arranged at intervals along the circumference of the second connecting portion 42 . The inner wall of the first connecting portion 32 has a plurality of mounting protrusions 321 , and the plurality of mounting protrusions 321 correspond one-to-one to the plurality of mounting grooves 422 .

[0102] In some embodiments, the plurality of mounting grooves 422 are evenly spaced apart along the circumference of the second connecting portion 42 .

[0103] In some embodiments, the plurality of mounting protrusions 321 are evenly spaced apart along the circumference of the first connecting portion 32 .

[0104] The number of the mounting grooves 422 is the same as the number of the mounting protrusions 321 . For example, the number of the mounting grooves 422 and the number of the mounting protrusions 321 are both three.

[0105] In an embodiment of the present application, a plurality of mounting grooves 422 are arranged at intervals along the circumference of the second connecting portion 42, so that a limiting structure formed by a plurality of mounting protrusions 321 and a plurality of mounting grooves 422 can be arranged around the second connecting portion 42, and the limiting structure is more evenly distributed, thereby improving the stability of the connection between the sleeve 40 and the gasket 30.

[0106] According to some embodiments of the present application, Fig.13 Another cross-sectional schematic diagram of the sleeve and the gasket provided in the embodiment of the present application is shown in FIG. Fig.13 The outer wall of the second connection part 42 has an external thread, the inner wall of the first connection part 32 has an internal thread, and the first connection part 32 is threadedly connected to the second connection part 42.

[0107] In the embodiment of the present application, along the first direction X, the internal threads are distributed on a portion of the inner wall of the first connection portion 32 , or the internal threads are distributed on the entire inner wall of the first connection portion 32 .

[0108] In the embodiment of the present application, along the first direction X, the external threads are distributed on the entire outer wall of the second connection portion 42 , or the external threads are distributed on a portion of the outer wall of the second connection portion 42 .

[0109] In the embodiment of the present application, the second connection portion 42 is connected to the first connection portion 32 by threads, and the connection method is simple and easy to disassemble, thereby facilitating the disassembly of the sleeve 40 and the gasket 30 .

[0110] According to some embodiments of the present application, the orthographic projection of the second flange portion 41 in the first projection plane is located within the orthographic projection of the first flange portion 31 in the first projection plane, and the first projection plane is perpendicular to the first direction X.

[0111] In some embodiments of the present application, when the shapes of the second flange portion 41 and the first flange portion 31 are both annular, the orthographic projection of the inner circle of the second flange portion 41 in the first projection plane is located outside the orthographic projection of the inner circle of the first flange portion 31 in the first projection plane, and the orthographic projection of the outer circle of the second flange portion 41 in the first projection plane is located inside the orthographic projection of the outer circle of the first flange portion 31 in the first projection plane.

[0112] In some embodiments of the present application, when the second flange portion 41 and the first flange portion 31 are both in the shape of a circular ring, the center line of the second flange portion 41 and the center line of the first flange portion 31 may or may not coincide with each other.

[0113] In the embodiment of the present application, the first flange portion 31 separates the second flange portion 41 from the box body 10 , and the projection surface of the first flange portion 31 is larger, which can further reduce the possibility of the second flange portion 41 contacting the box body 10 , thereby reducing the risk of corrosion of the box body 10 .

[0114] According to some embodiments of the present application, along the first direction X, the length of the first connection portion 32 is smaller than the length of the second connection portion 42 .

[0115] In some embodiments, the second connection portion 42 has a groove 421 , and along the first direction X, the first connection portion 32 at least covers a portion of the groove 421 of the second connection portion 42 .

[0116] In some embodiments, the second connection portion 42 has a mounting groove 422 , and along the first direction X, the first connection portion 32 at least covers a portion of the mounting groove 422 of the second connection portion 42 .

[0117] In some embodiments, the second connection portion 42 has a mounting protrusion 321 , and along the first direction X, the first connection portion 32 at least covers a portion of the mounting protrusion 321 of the second connection portion 42 .

[0118] In some embodiments, an outer wall of the second connection portion 42 has an external thread, and along the first direction X, the first connection portion 32 at least covers the external thread portion of the second connection portion 42 .

[0119] In the embodiment of the present application, for the box body 10 made of non-metallic material, the material of the middle part of the box body 10 is not easy to corrode, that is, the material of the box body 10 corresponding to the middle part of the connecting hole 12 is not easy to corrode, and the box body 10 corresponding to the middle part of the connecting hole 12 does not need to be separated from the sleeve 40 by the gasket 30. The length of the first connecting portion 32 is short, which can reduce the material of the gasket 30 and save costs.

[0120] For example, the middle portion of the box body 10 is made of resin or polyvinyl chloride.

[0121] According to some embodiments of the present application, the gasket 30 is made of aluminum or titanium alloy.

[0122] In the embodiment of the present application, the gasket 30 made of aluminum or titanium alloy can reduce the risk of potential difference corrosion when it contacts the box body 10 made of carbon fiber material, thereby improving the reliability of the battery.

[0123] According to some embodiments of the present application, the sleeve 40 is made of steel.

[0124] The sleeve 40 is made of steel, which is cheap among metals and can effectively reduce costs. In addition, steel has good anti-corrosion properties and can reduce the risk of the sleeve 40 being corroded.

[0125] In the embodiments of the present application, the connecting piece is generally made of metal with a relatively high hardness. For the box body 10 made of non-metallic material, the hardness of the box body 10 is relatively low. If the connecting piece is directly connected to the box body 10, there is a hardness difference between the connecting piece and the box body 10, which can easily cause damage to the box body 10 when the connecting piece shakes.

[0126] Exemplarily, the material of the box body 10 may include polypropylene or carbon fiber composite material.

[0127] In an embodiment of the present application, a sleeve 40 made of steel is arranged between the connecting member and the box body 10, and the sleeve 40 is connected to the box body 10 through a gasket 30, so that the hardness difference between the connecting member and the sleeve 40 is reduced. The sleeve 40 made of steel can provide a rigid connection interface for the connecting member and the box body 10, thereby improving the stability of the connection between the connecting member and the box body 10.

[0128] Exemplarily, the gasket 30 and the box body 10 may be bonded or threadedly connected.

[0129] According to some embodiments of the present application, the gasket 30 is bonded to the box body 10 .

[0130] In some embodiments, the gasket 30 and the box body 10 can be bonded together by adhesive or glue.

[0131] In the embodiment of the present application, the gasket 30 and the housing 10 are bonded and connected to each other, which can improve the stability of the connection between the two and reduce the possibility of the gasket 30 and the sleeve 40 shaking in the connecting hole 12 to a certain extent.

[0132] An embodiment of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0133] The electrical device may refer to the relevant description in the above embodiments, which will not be described again here.

[0134] The electrical device has the beneficial effects of the battery provided in the embodiments of the present application. For details, please refer to the specific description of the battery in the above embodiments, which will not be repeated here.

[0135] An embodiment of the present application provides an energy storage device, which includes the battery in the above embodiment, and the battery is used to store electrical energy.

[0136] The energy storage device has the beneficial effects of the battery provided in the embodiments of the present application. For details, please refer to the specific description of the battery in the above embodiments, which will not be repeated here.

[0137] The embodiment of the present application provides a battery. The battery includes a case 10, a battery cell 20, a gasket 30 and a sleeve 40. The case 10 has a accommodating cavity 11 and a connecting hole 12. The connecting hole 12 penetrates the case 10 along a first direction X, and the battery cell 20 is located in the accommodating cavity 11; the gasket 30 is made of aluminum or titanium alloy. The gasket 30 is bonded to the case 10. The gasket 30 includes a first flange portion 31 and a first connecting portion 32. The first flange portion 31 is connected to one end of the first connecting portion 32. The first flange portion 31 protrudes to the outside of the first connecting portion 32. The first connecting portion 32 is located in the connecting hole 12. The first flange portion 31 fits the surface of the case 10;

[0138] The sleeve 40 is made of steel and includes a second flange portion 41 and a second connecting portion 42. The second flange portion 41 is connected to one end of the second connecting portion 42. The second flange portion 41 protrudes outward from the second connecting portion 42. The second connecting portion 42 penetrates the first connecting portion 32. The second connecting portion 42 is connected to the first connecting portion 32.

[0139] The outer wall of the second connection portion 42 has a groove 421, and in the direction from close to the second flange portion 41 to away from the second flange portion 41, the bottom surface of the groove 421 is close to the middle of the second connection portion 42; at least part of the first connection portion 32 is located in the groove 421, and the part of the first connection portion 32 located in the groove 421 is in contact with the bottom surface of the groove 421. Along the first direction X, the side wall of the groove 421 close to the second flange portion 41 overlaps with the side wall of the second flange portion 41 close to the groove 421.

[0140] The orthographic projection of the second flange portion 41 in the first projection plane is located in the orthographic projection of the first flange portion 31 in the first projection plane, and the first projection plane is perpendicular to the first direction X. Along the first direction X, the length of the first connection portion 32 is less than the length of the second connection portion 42 .

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: The battery comprises: A box body (10) having a containing cavity (11) and a connecting hole (12), wherein the connecting hole (12) penetrates the box body (10) along a first direction; A battery cell (20), located in the accommodating cavity (11); The gasket (30) comprises a first flange portion (31) and a first connecting portion (32), wherein the first flange portion (31) is connected to one end of the first connecting portion (32), the first flange portion (31) protrudes outward from the first connecting portion (32), the first connecting portion (32) is located in the connecting hole (12), and the first flange portion (31) is in contact with the surface of the box body (10); The sleeve (40) comprises a second flange portion (41) and a second connecting portion (42), wherein the second flange portion (41) is connected to one end of the second connecting portion (42), the second flange portion (41) protrudes outward from the second connecting portion (42), the second connecting portion (42) penetrates the first connecting portion (32), and the second flange portion (41) is in contact with the first flange portion (31).

2. The battery according to claim 1, characterized in that The second connection portion (42) is connected to the first connection portion (32).

3. The battery according to claim 2, characterized in that The outer wall of the second connecting portion (42) has a groove (421), and in a direction from close to the second flange portion (41) to away from the second flange portion (41), the bottom surface of the groove (421) is close to the middle of the second connecting portion (42), and at least part of the first connecting portion (32) is located in the groove (421).

4. The battery according to claim 3, characterized in that The groove (421) surrounds the second connecting portion (42) along the circumference of the second connecting portion (42).

5. The battery according to claim 3, characterized in that Along the first direction, a side wall of the groove (421) close to the second flange portion (41) overlaps with a side wall of the second flange portion (41) close to the groove (421).

6. The battery according to claim 2, characterized in that The outer wall of the second connecting part (42) is fitted with the inner wall of the first connecting part (32), one of the outer wall of the second connecting part (42) and the inner wall of the first connecting part (32) has a mounting groove (422), and the other of the outer wall of the second connecting part (42) and the inner wall of the first connecting part (32) has a mounting protrusion (321), and the mounting protrusion (321) is located in the mounting groove (422).

7. The battery according to claim 6, characterized in that The outer wall of the second connecting portion (42) has a plurality of mounting grooves (422), and the plurality of mounting grooves (422) are arranged at intervals along the circumference of the second connecting portion (42). The inner wall of the first connecting portion (32) has a plurality of mounting protrusions (321), and the plurality of mounting protrusions (321) correspond one-to-one to the plurality of mounting grooves (422).

8. The battery according to claim 2, characterized in that The outer wall of the second connection part (42) has an external thread, the inner wall of the first connection part (32) has an internal thread, and the first connection part (32) is threadedly connected to the second connection part (42).

9. The battery according to any one of claims 1 to 8, characterized in that The orthographic projection of the second flange portion (41) in the first projection plane is located within the orthographic projection of the first flange portion (31) in the first projection plane, and the first projection plane is perpendicular to the first direction.

10. The battery according to any one of claims 1 to 8, characterized in that Along the first direction, the length of the first connecting portion (32) is smaller than the length of the second connecting portion (42).

11. The battery according to any one of claims 1 to 8, characterized in that The gasket (30) is made of aluminum or titanium alloy.

12. The battery according to any one of claims 1 to 8, characterized in that The sleeve (40) is made of steel.

13. The battery according to any one of claims 1 to 8, characterized in that The gasket (30) is bonded to the box body (10).

14. An electrical device, characterized in that: The electrical device comprises a battery according to any one of claims 1 to 13, wherein the battery is used to provide electrical energy.

15. An energy storage device, characterized in that: The energy storage device comprises a battery according to any one of claims 1 to 13, wherein the battery is used to store electrical energy.

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