CN220706395U

CN220706395U - Sealing gasket, battery box, battery and power utilization device

Info

Publication number: CN220706395U
Application number: CN202420046805.9U
Authority: CN
Inventors: 梅敏; 方少杰; 高健; 贾峰
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-01-09
Filing date: 2024-01-09
Publication date: 2024-04-02
Anticipated expiration: 2034-01-09

Abstract

The application provides a sealing washer, battery box, battery and power consumption device, belongs to battery technical field. The sealing gasket comprises a first annular piece and a second annular piece. The second annular piece is connected with the first annular piece and is concentrically arranged along the radial direction, the second annular piece comprises an annular body and a protruding part, the annular body comprises a first surface and a second surface which are opposite along the thickness direction, and the protruding part is an annular protruding part protruding outwards from the first surface and/or the second surface; the elastic modulus of the second annular piece is smaller than that of the first annular piece, the thickness of the annular body of the second annular piece is smaller than or equal to that of the first annular piece, and the maximum thickness of the second annular piece is larger than that of the first annular piece.

Description

Sealing gasket, battery box, battery and power utilization device

Technical Field

The application relates to the technical field of batteries, in particular to a sealing gasket, a battery box body, a battery and an electric device.

Background

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

The reliability of the sealing of the battery box body from the outside is an important factor affecting the service life and safety of the battery. In order to prevent external water vapor from entering the battery box body through a possible gap at the fixed connection position of the upper box body and the lower box body, it is necessary to improve the sealing performance at the fixed connection position of the upper box body and the lower box body.

Disclosure of Invention

The present application aims to solve at least one of the technical problems existing in the background art. Therefore, an object of the present application is to provide a sealing gasket, a battery case, a battery, and an electric device, so as to improve sealing performance.

Embodiments of the first aspect of the present application provide a sealing gasket comprising a first ring and a second ring. The second ring member is connected with the first ring member and is arranged concentrically in the radial direction, the second ring member includes an annular body including a first surface and a second surface opposite in the thickness direction, and a boss portion which is an annular boss protruding outward from the first surface and/or the second surface. The elastic modulus of the second annular piece is smaller than that of the first annular piece, the thickness of the annular body of the second annular piece is smaller than or equal to that of the first annular piece, and the maximum thickness of the second annular piece is larger than that of the first annular piece.

In this embodiment of the application's technical scheme, through setting up sealing washer to including the different first annular piece of modulus of elasticity and second annular piece, utilize the elastic deformation of the bellying of the less second annular piece of rigidity to realize sealing, utilize the great first annular piece of rigidity thickness to control the sealing compression rate, on the one hand can prevent that the compression rate is not enough to lead to sealing failure like this, on the other hand also can prevent to a certain extent that the compression rate is too high to lead to the second annular piece crushing damage, improve sealed reliability and sealing washer's life.

In some embodiments, the thickness t of the annular body ₁ The thickness T of the first annular piece is more than or equal to 0.5 and less than or equal to T ₁ T is less than or equal to 1. From this, rationally select the thickness size of the annular body of second ring spare and first ring spare helps improving the joint strength between first ring spare and the second ring spare, reduces the back-up risk after the installation.

In some embodiments, the maximum thickness t of the second ring member ₂ The thickness T of the first annular piece is more than 0 and less than T ₂ T.ltoreq.T/3. Therefore, by further limiting the thickness dimensions of the second annular piece and the first annular piece, the risk of crushing caused by too high bulge compression ratio can be reduced to a certain extent, and the sealing reliability can be improved.

In some embodiments, the boss includes at least one upper boss on the first surface and at least one lower boss on the second surface, and the projections of the upper boss and the lower boss on the first surface are fully coincident. Therefore, the sealing effect of the sealing gasket is improved to a certain extent by arranging the protruding parts on the upper surface and the lower surface of the annular body.

In some embodiments, a through hole is formed in a middle portion of the first ring member, the first ring member includes a first sidewall and a second sidewall radially opposite each other, the first sidewall defining the through hole, and the second ring member is connected to the first sidewall or the second sidewall. Therefore, the first annular piece and the second annular piece are connected with each other in a sleeving manner in the thickness direction, the structure is simple, the processing of the first annular piece and the second annular piece is convenient, and multiple choices are provided for the sealing position of the sealing gasket.

In some embodiments, the second ring member comprises an inner ring member and an outer ring member, the ring body comprising an inner ring body of the inner ring member and an outer ring body of the outer ring member, the lobes comprising a first lobe at a surface of the inner ring body and a second lobe at a surface of the outer ring body; the inner ring piece is positioned in the through hole and connected with the first side wall, and the outer ring piece surrounds the outer side of the first ring piece and is connected with the second side wall. By constructing the second ring member as a double structure including both the inner ring member located at the inner ring of the first ring member and the outer ring member located at the outer ring of the first ring member, an interface seal is added, and the seal reliability of the seal gasket is improved to some extent.

In some embodiments, the first side wall and/or the second side wall of the first ring for connection with the second ring is polygonal in cross section. Thus, the cross section of the first side wall and/or the second side wall of the first ring member for connecting with the second ring member is polygonal, and the interaction force between the connecting positions of the first ring member and the second ring member can be increased and the mutual rotation between the connecting positions can be restrained, so that the possibility that the first ring member and the second ring member are separated from each other when the connecting members are fastened can be reduced to a certain extent.

In some embodiments, the first sidewall and/or the second sidewall are connected to the second ring member by an adhesive layer. The adhesive connection achieved by means of the adhesive layer thus increases the strength of the connection between the first ring element and the second ring element to a certain extent and prevents mutual rotation between the two.

In some embodiments, the first sidewall and/or the second sidewall are connected to the second ring member by a snap-fit structure. Therefore, the detachable fixed connection between the first annular piece and the second annular piece is realized through the arrangement of the clamping structure, the connection process between the first annular piece and the second annular piece can be simplified to a certain extent, the connection positions of the first annular piece and the second annular piece can be limited, the relative rotation between the first annular piece and the second annular piece is prevented, and the connection reliability of the first annular piece and the second annular piece is improved.

In some embodiments, the material of the first ring member comprises metal and the material of the second ring member comprises rubber. Thus, the choice of metal and rubber materials as described above contributes to an improvement in the reliability of the seal.

An embodiment of a second aspect of the present application provides a battery case, including an upper cover provided with a mounting hole; the lower box body is provided with a rivet nut; the bolt passes through the mounting hole and is connected with the rivet nut; and a sealing washer as described in the first aspect of the application, the sealing washer being located between the bolt and the upper cover. The battery case has the same technical effects as the sealing gasket described in the first aspect of the present application, and will not be described herein.

In some embodiments, the battery case further includes an elastic sealing layer between the lower case and the upper cover. Therefore, the sealing effect of the battery box body can be further ensured by arranging the elastic sealing layer between the lower box body and the upper cover.

Embodiments of the third aspect of the present application provide a battery including the battery case in the second aspect of the present application.

Embodiments of the fourth aspect of the present application provide an electrical device comprising a battery of the third aspect of the present application for providing electrical energy.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

In the drawings, the same reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily drawn to scale. It is appreciated that these drawings depict only some embodiments according to the disclosure and are not therefore to be considered limiting of its scope.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

fig. 2 is an exploded view of a battery according to some embodiments of the present application;

FIG. 3 is a schematic structural view of a sealing gasket according to some embodiments of the present application;

FIG. 4 is a top view of a sealing gasket according to some embodiments of the present application;

FIG. 5 is a cross-sectional view of a sealing gasket according to some embodiments of the present application;

FIG. 6 is a schematic view of a seal gasket according to further embodiments of the present application;

FIG. 7 is a top view of a sealing gasket according to further embodiments of the present application;

FIG. 8 is a cross-sectional view of a sealing gasket according to further embodiments of the present application;

FIG. 9 is a schematic structural view of a sealing gasket according to further embodiments of the present application;

FIG. 10 is a top view of a sealing gasket according to further embodiments of the present application;

FIG. 11 is a cross-sectional view of a sealing gasket according to further embodiments of the present application;

fig. 12 is a cross-sectional view of a battery case according to some embodiments of the present application.

Reference numerals illustrate:

a vehicle 1000;

battery 100, controller 200, motor 300;

a battery case 10, an upper cover 11, and a lower case 12; a battery cell 20;

a sealing gasket 1;

a first ring member 110, a first sidewall 111, a second sidewall 112, a through hole 113;

second ring member 120, ring body 121, first surface 1211, second surface 1212, boss 122, upper boss 1221, lower boss 1222, inner ring member 123, inner ring body 1231, first boss 1232, outer ring member 124, outer ring body 1241, second boss 1242;

a bolt 130;

rivet nut 140, flange 141;

and an elastic sealing layer 150.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

The reliability of the sealing of the battery box body from the outside is an important factor affecting the service life and safety of the battery. In order to prevent external water vapor from entering the battery box body through a possible gap at the fixed connection position of the upper box body and the lower box body, a current technical scheme is that a sealing ring is arranged at the fixed connection position of the upper box body and the lower box body. However, the sealing ring can lead to a large area of glue being clamped at the mating surface, forming a soft connection, resulting in a loose risk of the connection piece.

To improve the above-mentioned problem, the present application proposes a sealing gasket comprising a first annular member and a second annular member. And the second annular piece is connected with the first annular piece and is concentrically arranged along the radial direction, the second annular piece comprises an annular body and a protruding part, the annular body comprises a first surface and a second surface which are opposite along the thickness direction, and the protruding part is an annular protruding part protruding outwards from the first surface and/or the second surface. The elastic modulus of the second annular piece is smaller than that of the first annular piece, the thickness of the annular body of the second annular piece is smaller than or equal to that of the first annular piece, and the maximum thickness of the second annular piece is larger than that of the first annular piece. The elastic modulus of the first annular piece is large, which means that the first annular piece has larger rigidity, is relatively difficult to deform after being extruded in the thickness direction, can bear the pressing force in the thickness direction, and avoids torque attenuation caused by soft connection. The elastic modulus of the second annular piece is small, elastic deformation is easier to generate after the second annular piece is extruded in the thickness direction, the thickness is reduced, gaps between the matching surfaces are extended and filled along two sides of the direction of the extrusion surface, and therefore the sealing effect is improved. Therefore, the connecting piece can be prevented from loosening under the condition of ensuring the sealing effect.

The sealing gasket disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the use of the sealing gasket. The power supply system with the sealing gasket, the battery box body, the battery and the like disclosed by the application can be used for forming the power utilization device, so that the connection piece is prevented from loosening under the condition of ensuring the sealing effect of the battery box body.

The embodiment of the application provides an electricity utilization device using a battery as a power supply, wherein the electricity utilization device can be, but is not limited to, a mobile phone, a tablet, a notebook 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 fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery according to some embodiments of the present application. The battery 100 includes a case 10 and a battery cell 20, and the battery cell 20 is accommodated in the case 10. The case 10 is used to provide an accommodating space for the battery cell 20, and the case 10 may have various structures. In some embodiments, the case 10 may include an upper cover 11 and a lower case 12, the upper cover 11 and the lower case 12 being overlapped with each other, the upper cover 11 and the lower case 12 together defining a receiving space for receiving the battery cell 20. The lower case 12 may have a hollow structure with one end opened, the upper cover 11 may have a plate-shaped structure, and the upper cover 11 covers the opening side of the lower case 12, so that the upper cover 11 and the lower case 12 together define an accommodating space; the upper cover 11 and the lower case 12 may be hollow structures each having an opening at one side, and the opening side of the upper cover 11 may be closed to the opening side of the lower case 12. Of course, the case 10 formed by the upper cover 11 and the lower case 12 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.

In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in the case 10. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 20 may be a secondary battery or a primary battery; but not limited to, lithium sulfur batteries, sodium ion batteries, or magnesium ion batteries. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Fig. 3 is a schematic structural view of a sealing gasket according to some embodiments of the present application, fig. 4 is a top view of a sealing gasket according to some embodiments of the present application, and fig. 5 is a cross-sectional view of a sealing gasket according to some embodiments of the present application.

Referring to fig. 3 to 5, a sealing gasket 1 is provided in an embodiment of the present application, and includes a first ring member 110 and a second ring member 120. The second ring member 120 is connected to the first ring member 110 and is arranged concentrically in the radial direction, the second ring member 120 includes an annular body 121 and a boss 122, the annular body 121 includes a first surface 1211 and a second surface 1212 opposite in the thickness direction, and the boss 122 is an annular protrusion protruding outward from the first surface 1211 and/or the second surface 1212. The elastic modulus of the second ring member 120 is smaller than that of the first ring member 110, the thickness of the ring body 121 of the second ring member 120 is smaller than or equal to that of the first ring member 110, and the thickness of the position of the protruding portion 122 of the second ring member 120 is larger than that of the first ring member 110.

The first ring member 110 and the second ring member 120 are generally shaped as a ring structure having a certain thickness, and the outer dimension of one of the first ring member 110 and the second ring member 120 is adapted to the inner dimension of the other, so that the first ring member 110 and the second ring member 120 can be mutually sleeved together to form the sealing gasket 1. The first ring member 110 and the second ring member 120 may be removably connected, such as by an interference fit, or may be adhesively or otherwise non-removably connected.

The protruding portion 122 may be disposed on the first surface 1211 or the second surface 1212, or may be disposed on both the first surface 1211 and the second surface 1212, and the projection of the protruding portion 122 on the plane thereof may be any shape, such as a closed ring, to achieve a seal along 360 ° in the circumferential direction, for example, a ring shape, a polygonal ring shape, or the like. The cross-sectional shape of the boss 122 may be triangular, trapezoidal, or other shape. In some embodiments, the number of protrusions 122 on first surface 1211 or second surface 1212 may be one or more, and the plurality of protrusions 122 may be concentrically radially spaced apart.

In some embodiments, the boss 122 is disposed at both the first surface 1211 and the second surface 1212, and the thickness centerline of the first ring member 110 and the thickness centerline of the annular body 121 of the second ring member 120 coincide.

The second ring member 120 has a modulus of elasticity that is less than that of the first ring member 110. In some embodiments, the first ring member 110 may be made of a rigid material, such as metal or hard plastic, and the second ring member 120 may be made of an elastic material.

In some embodiments, the sealing gasket 1 may be disposed between an end of the fastener and the connection surface, for example, the fastener may be an upper cover bolt, which may be a surface of a member to be sealed and connected, for example, an upper cover of a battery case, the upper cover bolt being screwed into the case such that a gap between the end of the upper cover bolt and the connection surface of the upper cover is gradually reduced, and for the second ring member 120, the second ring member 120 (particularly, the boss 122 of the second ring member 120) is deformed after being pressed in a thickness direction, the thickness is reduced, and extends to both sides along the pressing surface, thereby achieving sealing in close contact with the pressing surface. For the first ring member 110, the first ring member 110 is relatively not easy to deform after being extruded in the thickness direction, and can bear the pressing force in the thickness direction, so that the gap size of the sealing interface between the upper cover bolt and the connecting surface can be kept, and the compression stroke of the fastener during sealing connection can be controlled, thereby further controlling the compression rate.

Thus, by providing the sealing gasket 1 to include the first ring member 110 and the second ring member 120 having different elastic moduli, sealing is achieved by elastic deformation of the boss 122 of the second ring member 120 having smaller rigidity, and the sealing compression rate is controlled by the thickness of the first ring member 110 having larger rigidity, so that on one hand, it is possible to prevent the failure of the sealing due to insufficient compression rate, and on the other hand, it is also possible to prevent the crushing damage of the second ring member 120 due to excessively high compression rate over a certain length, improving the reliability of the sealing and the service life of the sealing gasket 1.

Referring to fig. 5, the thickness t of the annular body 121 ₁ The thickness T of the first ring member 110 is 0.5T ₁ /T≤1。

The annular body 121 of the second annular member 120 has a flat annular structure with a uniform thickness, and a thickness t ₁ The first ring member 110 is also a flat plate-like ring structure of uniform thickness, and has a thickness T. The dimension of the connecting surface between the annular body 121 of the second annular member 120 and the first annular member 110 is the overlapping dimension of the thicknesses of the two. In some embodiments, the thickness centerline of the annular body 121 of the second annular member 120 coincides with the thickness centerline of the first annular member 110.

When the thickness t of the annular body 121 of the second annular member 120 ₁ When the ratio to the thickness T of the first ring member 110 is too small, the connection area between the first ring member 110 and the second ring member 120 is limited, and the connection strength between the first ring member 110 and the second ring member 120 is easily affected. When the thickness t of the annular body 121 of the second annular member 120 ₁ When the thickness T of the second ring member 110 is greater than the thickness T of the first ring member 110, the ring body 121 of the second ring member may directly contact with the upper and lower mating surfaces in the thickness direction, so that the area of the flexible connection is enlarged after being extruded by the mating surfaces, and the risk of untwisting of the connecting member is increased.

Thus, a reasonable choice of thickness dimensions of the annular body 121 of the second annular member 120 and the first annular member 110 helps to improve the strength of the connection between the first annular member 110 and the second annular member 120, reducing the risk of back-twisting after installation.

Referring to fig. 5, the maximum thickness t of the second ring member 120 ₂ The thickness T of the first ring member 110 is 0 < T ₂ -T≤T/3。

The protruding portion 122 of the second ring member 120 protrudes from the surface of the ring body 121, and the thickness of the location where the protruding portion 122 is located is greater than that of the ring body 121. In some embodiments, the first surface 1211 and the second surface 1212 of the annular body 121 of the second annular member 120 are each provided with a protrusion, where the maximum thickness t of the second annular member 120 is the dimension between the tips of the protrusions on the first surface 1211 and the tips of the protrusions on the second surface 1212.

The protruding portion 122 of the second ring member 120 deforms when subjected to the vertical pressing force at the mating surface, and the protruding portion 122 of the second ring member 120 protrudes from the surface of the first ring member 110 in the thickness direction, i.e., 0 < t ₂ -T. Meanwhile, when the boss 122 of the second ring member 120 excessively protrudes from the first ring member 110, the boss 122 may be crushed to affect the sealing effect, and thus an upper limit condition needs to be set for the thickness of the boss 122 of the second ring member 120. In this example, the thickness t of the second annular member 120 at the location of the boss 122 ₂ Is configured as t ₂ -T≤T/3。

By limiting the thickness dimensions of the second ring member 120 and the first ring member 110, the risk of crushing due to an excessively high compression ratio of the protruding portion 122 can be reduced to some extent, which contributes to an improvement in the reliability of the seal.

Referring to fig. 5, the protrusion 122 includes at least one upper protrusion 1221 located on the first surface 1211 and at least one lower protrusion 1222 located on the second surface 1212, and the projections of the upper protrusion 1221 and the lower protrusion 1222 on the first surface 1211 are completely coincident.

The upper protrusion 1221 may have the same cross-sectional shape and size as the lower protrusion 1222 or may be different. The number of the upper protrusions 1221 may be one or a plurality, wherein the plurality of upper protrusions are arranged at radial intervals, for example, a plurality of concentric annular protrusions arranged at radial intervals. Similarly, the lower tab 1222 may also be one or more. In some embodiments, the upper protrusions 1221 and the lower protrusions 1222 are each a plurality and are disposed in a one-to-one correspondence such that any one of the upper protrusions 1221 fully coincides with the projection of the corresponding lower protrusion 1222 on the first surface 1211.

Since the sealing gasket 1 has a risk of liquid penetration on both sides in the thickness direction thereof. Thus, by providing the protrusions 122 on both the upper and lower surfaces of the annular body 121, the sealing effect of the sealing gasket 1 is improved to some extent.

Referring to fig. 5 or 8, a through hole 113 is formed in the middle of the first ring member 110, the first ring member 110 includes a first sidewall 111 and a second sidewall 112 that are opposite to each other in a radial direction, the first sidewall 111 defines the through hole 113, and the second ring member 120 is connected to the first sidewall 111 or the second sidewall 112.

The first ring member 110 and the second ring member 120 may be coupled to each other to form a density washer. It is to be understood that the present utility model is not limited to the relative position between the first ring member 110 and the second ring member 120. As shown in fig. 5, the second ring member 120 may be located radially inward of the first ring member 110. As shown in fig. 8, the first ring member 110 may also be located radially inward of the second ring member 120.

Therefore, the first annular piece 110 and the second annular piece 120 are connected with each other in a sleeving manner in the thickness direction, so that the structure is simple, the processing of the first annular piece 110 and the second annular piece 120 is convenient, and various choices are provided for the sealing position of the sealing gasket 1.

FIG. 9 is a schematic structural view of a sealing gasket according to further embodiments of the present application; FIG. 10 is a top view of a sealing gasket according to further embodiments of the present application; FIG. 11 is a cross-sectional view of a sealing gasket according to further embodiments of the present application.

Referring to fig. 9 to 11, the second ring member 120 includes an inner ring member 123 and an outer ring member 124, the ring body 121 includes an inner ring body 1231 of the inner ring member 123 and an outer ring body 1241 of the outer ring member 124, and the boss 122 includes a first boss 1232 located on a surface of the inner ring body 1231 and a second boss 1242 located on a surface of the outer ring body 1241; the inner ring member 123 is disposed in the through hole and connected to the first sidewall 111, and the outer ring member 124 surrounds the outer side of the first ring member 110 and is connected to the second sidewall 112.

The inner ring member 123 and the outer ring member 124 are relatively independent two members, each of which is independently connected to the first ring member 110. The first protrusions 1232 provided on the inner ring member 123 may be the same as or different from the second protrusions 1242 provided on the outer ring member 124, and are not particularly limited in this application. In some embodiments, the maximum dimension of the inner ring 123 is the same as the maximum dimension of the outer ring 124, and the thickness of the inner ring body 1231 of the inner ring 123 is the same as the thickness of the outer ring body 1241 of the outer ring 124.

Thus, by configuring the second ring member 120 to have a double structure including both the inner ring member 123 located at the inner ring of the first ring member 110 and the outer ring member 124 located at the outer ring, an interface seal is added, and the sealing reliability of the sealing gasket 1 is improved to some extent.

According to some embodiments of the present application, the cross-section of the first side wall 111 and/or the second side wall 112 of the first ring member 110 for connection with the second ring member 120 is polygonal.

The cross section of the first side wall 111 and/or the second side wall 112 refers to a cross section of the first side wall 111 and/or the second side wall 112 perpendicular to the thickness direction of the first ring member 110, or may be a projection of the first side wall 111 and/or the second side wall 112 onto a surface of the first ring member perpendicular to the thickness direction.

At least one surface of the sealing gasket 1 may be in contact with the fastener during use of the sealing gasket 1. When the fastener is rotated such that the fastening force is gradually increased, the fastener applies a frictional force to the sealing washer 1 such that the sealing washer 1 rotates in the direction of the fastener rotation. Because the materials of the first ring member 110 and the second ring member 120 and the contact area with the fastener are different, the generated friction force is also different, so that a relative rotational displacement may be generated between the first ring member 110 and the second ring member 120.

As shown in fig. 4, the cross section of the first sidewall 111 and/or the second sidewall 112 of the first ring member 110 for connecting with the second ring member 120 is a regular hexagon. In some embodiments, the sidewall of the second ring member 120 for connection with the first ring member 110 may be a polygon that fits the first ring member 110, such as a regular hexagon as with the first ring member 110. In other embodiments, the sidewall of the second ring member 120 for connection with the first ring member 110 may be of a different configuration than the sidewall of the first ring member 110, e.g., may be circular in cross-section, or may be of a different polygon.

Thus, the cross section of the first side wall 111 and/or the second side wall 112 of the first ring member 110 for connection with the second ring member 120 is provided as a polygon, and in the case where both connection side walls are circular, the interaction force between the connection positions can be increased, the mutual rotation between the two can be suppressed, and the possibility of the first ring member 110 and the second ring member 120 being separated from each other when the connection members are fastened can be reduced to some extent.

According to some embodiments of the present application, the first side wall 111 and/or the second side wall 112 are connected to the second ring 120 by means of an adhesive layer.

The adhesive layer may be formed by applying adhesive between the first ring member 110 and the second ring member 120 such that the two are adhered by the adhesive layer. In some embodiments, the adhesive layer may be an adhesive layer formed on the entire surface of the first sidewall 111 and/or the second sidewall 112, or may be an adhesive layer having at least one hollow area, or may be a composition of a plurality of adhesive areas spaced apart on the surface of the first sidewall 111 and/or the second sidewall 112.

The adhesive connection achieved by the adhesive layer thus increases the strength of the connection between the first ring member 110 and the second ring member 120 to some extent and prevents the mutual rotation therebetween.

According to some embodiments of the present application, the first side wall 111 and/or the second side wall 112 are connected to the second ring 120 by a snap-fit structure.

In some embodiments, a first clamping portion for clamping may be disposed on the first side wall 111 and/or the second side wall 112 of the first ring member 110, and a second clamping portion matched with the first clamping portion may be disposed on the second ring member 120 correspondingly, so that the first clamping portion and the second clamping portion are matched with each other to realize clamping fixation of the first clamping portion and the second clamping portion. For example, the first clamping portion may be a protruding clamping block, and the second clamping portion may be a clamping groove adapted to the clamping block structure.

Therefore, the detachable fixed connection between the first annular piece 110 and the second annular piece 120 is realized by arranging the clamping structure, so that the connection process between the first annular piece 110 and the second annular piece 120 can be simplified to a certain extent, the connection positions of the first annular piece 110 and the second annular piece 120 can be limited, the relative rotation between the first annular piece and the second annular piece is prevented, and the connection reliability of the first annular piece and the second annular piece is improved.

According to some embodiments of the present application, the material of the first ring member 110 comprises metal and the material of the second ring member 120 comprises rubber.

In some embodiments, the first ring member 110 may be made of aluminum alloy, steel or other alloy steel, and the second ring member 120 may be made of one or more of natural rubber, silicone rubber, nitrile rubber, neoprene rubber, fluororubber, ethylene propylene diene rubber, polyurethane rubber, epichlorohydrin rubber, and acrylate rubber. In some embodiments, the materials of the inner ring 123 and the outer ring 124 of the second ring 120 may be the same or different.

Thus, by further defining the material of the first ring member 110 and the second ring member 120, it is advantageous to improve the reliability of the sealing gasket.

Embodiments of the second aspect of the present application provide a battery case.

Fig. 12 is a cross-sectional view of a battery case according to some embodiments of the present application. As shown in fig. 12, the battery case 10 includes an upper cover 11 provided with mounting holes; the lower box body 12 is provided with a rivet nut 140; a bolt 130 passing through the mounting hole and connected with a rivet nut 140; and a sealing gasket 1 in the first aspect of the present application, the sealing gasket 1 being located between the bolt 130 and the upper cover 11. The battery case 10 has the same technical effects as the sealing gasket 1 described in the first aspect of the present application, and will not be described herein.

Referring to fig. 12, the battery case 10 further includes an elastic sealing layer 150 between the lower case 12 and the upper cover 11. Thus, the sealing effect can be further ensured by providing the elastic sealing layer 150.

Embodiments of the third aspect of the present application provide a battery comprising a battery housing as described above.

An embodiment of a fourth aspect of the present application provides an electrical device, including the above-mentioned battery, where the battery is configured to provide electrical energy.

The technical scheme of the application is further described through a specific embodiment.

As shown in fig. 12, the battery case 10 includes an upper cover 11, a lower case 12, a sealing gasket 1, and an elastic sealing layer 150.

The upper cover 11 is provided with mounting holes. The lower case 12 is provided with a rivet nut 140, and the bolt 130 passes through the mounting hole and is connected to the rivet nut 140. The blind rivet nut 140 further includes a flange 141, the height of the flange 141 and the height of the elastic sealing layer 150 being adapted to each other, thereby ensuring that the compression ratio for the elastic sealing layer 150 is in a proper range. The sealing washer 1 is located between the bolt 130 and the upper cover 11, thereby providing a seal.

As shown in fig. 9 to 11, the sealing gasket 1 includes a first ring member 110 and a second ring member 120, and the second ring member 120 includes an inner ring member 123 and an outer ring member 124, thereby forming a structure of "inner ring member 123-first ring member 110-outer ring member 124" in the radial direction. The first ring member 110 may be made of stainless steel or carbon steel so as to withstand vertical fastening force in the thickness direction. The inner ring 123 and the outer ring 124 may be made of vulcanized rubber, so as to have the characteristics of high and low temperature resistance, weather resistance, corrosion resistance, long service life and the like.

The inner ring 123 has a first boss 1232 thereon and the outer ring 124 has a second boss 1242 thereon. The above two protrusions are provided on the first surface 1211 and the second surface 1212 opposite to each other in the thickness direction, and the maximum thickness of the two protrusions is greater than the thickness of the first ring member 110. For example, the thickness T of the first ring 110 may be 1mm, and the maximum thickness between the first and second protrusions 1232 and 1242 is 1.3mm. The specific structure of the first and second protrusions 1232 and 1242 may be annular protrusions, thereby achieving a 360 ° seal in the circumferential direction.

The elastic modulus of the inner ring member 123 and the outer ring member 124 (particularly, the aforementioned two protrusions) is smaller than that of the first ring member 110, so that deformation occurs after being pressed in the thickness direction, the thickness is reduced, and the two sides extend along the direction of the pressing surface, so that the gap between the mating surfaces is filled, and the clearance-free fit between the mating surfaces is facilitated to a certain extent, so that the sealing effect is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A sealing gasket, comprising:

a first ring member;

a second ring member connected to the first ring member and arranged concentrically in a radial direction, the second ring member including a ring-shaped body including a first surface and a second surface opposite in a thickness direction, and a boss portion which is an annular protrusion protruding outward from the first surface and/or the second surface;

the elastic modulus of the second annular piece is smaller than that of the first annular piece, the thickness of the annular body of the second annular piece is smaller than or equal to that of the first annular piece, and the maximum thickness of the second annular piece is larger than that of the first annular piece.

2. The sealing gasket of claim 1 wherein said annular body has a thickness t ₁ The thickness T of the first annular piece is as follows: t is more than or equal to 0.5 ₁ /T≤1。

3. A sealing gasket according to claim 1 or 2, wherein the second annular member has a maximum thickness t ₂ The thickness T of the first annular piece is as follows: t is more than 0 ₂ -T≤T/3。

4. The sealing gasket of claim 1 or 2, wherein the boss comprises at least one upper boss on the first surface and at least one lower boss on the second surface, and wherein the projections of the upper boss and the lower boss on the first surface are fully coincident.

5. A sealing gasket according to claim 1 or 2, wherein a through hole is formed in the middle of the first ring member, the first ring member comprising radially opposed first and second side walls, the first side wall defining the through hole, the second ring member being connected to the first or second side wall.

6. The sealing gasket of claim 5, wherein the second ring member comprises an inner ring member and an outer ring member, the ring body comprising an inner ring body of the inner ring member and an outer ring body of the outer ring member, the boss comprising a first boss on a surface of the inner ring body and a second boss on a surface of the outer ring body;

the inner ring piece is positioned in the through hole and connected with the first side wall, and the outer ring piece encloses the outer side of the first ring piece and is connected with the second side wall.

7. The sealing gasket of claim 5, wherein the first ring member and/or the first sidewall and/or the second sidewall for connection with the second ring member are polygonal in cross-section.

8. The gasket of claim 5 wherein the first sidewall and/or the second sidewall are connected to the second annular member by an adhesive layer.

9. The sealing gasket of claim 5, wherein the first sidewall and/or the second sidewall are connected to the second ring member by a snap-fit structure.

10. The gasket of claim 1 or 2 wherein the material of the first ring member comprises metal and the material of the second ring member comprises rubber.

11. A battery box, comprising:

the upper cover is provided with a mounting hole;

the lower box body is provided with a rivet nut;

the bolt passes through the mounting hole and is connected with the rivet nut; the method comprises the steps of,

a sealing washer as claimed in any one of claims 1 to 10, located between the bolt and the upper cover.

12. The battery compartment of claim 11, further comprising:

and the elastic sealing layer is positioned between the lower box body and the upper cover.

13. A battery comprising a battery case as claimed in claim 11 or 12.

14. An electrical device comprising the battery of claim 13 for providing electrical energy.