CN112242579A

CN112242579A - Housing sealing structure and battery

Info

Publication number: CN112242579A
Application number: CN202011316664.0A
Authority: CN
Inventors: 靳建明
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-01-19

Abstract

The application relates to a shell sealing structure and a battery, the shell sealing structure comprises a cover plate, an elastic sealing element and a shell body, wherein the elastic sealing element is wrapped at the edge part of the cover plate; the shell body comprises a shell bottom plate and a frame, one end of the frame is connected with the shell bottom plate, and a plurality of positions on the other end of the frame are bent to form fixing grooves; the cover plate is connected to the fixing groove through the elastic sealing element, and at least one pressure relief through hole is formed in the frame and located in the fixing groove. Therefore, the fixing groove is formed by bending the shell at the frame, so that a plurality of compression rate mutation areas can be formed by the bending section bulges and the bending section depressions of the shell and the elastic sealing element, and a curve sealing route is formed to ensure that the sealing effect is more reliable; moreover this application pressure release through-hole's setting for this application has the explosion-proof pressure release function relevant with elastic sealing element elastic deformation, and because the relevant deformation of the housing seal structure compression ratio of this application is less, so the explosion-proof pressure release sensitivity of this application is higher.

Description

Housing sealing structure and battery

Technical Field

The application relates to the technical field of batteries, in particular to a shell sealing structure and a battery.

Background

At present, batteries are widely applied to various occasions as movable power supplies and become essential articles for life of people.

In the prior art, the lithium ion battery, especially the button type lithium ion battery, adopts a combined riveting structure of an upper half shell and a lower half shell similar to a primary button battery, or a combined welding structure of a shell and a cover plate, and the structures have the defects of complex manufacturing process and higher manufacturing cost.

In addition, the upper and lower half shells in the prior art are combined and riveted, the structure is that radial extrusion riveting is carried out on the overlapping area of the upper and lower shells on the side surface, and the internal support of the battery is mainly supported by the thin wall of the internal half shell and the electrode structure. Due to insufficient supporting strength of the part, the extrusion riveting is insufficient, the part is easy to rebound, and the compression ratio of the sealing element after the riveting is insufficient. Therefore, the sealing performance after riveting is unreliable, and leakage is easily caused in the subsequent use process of the battery.

Among the prior art, some upper and lower half shell combination riveted structure also is equipped with the pressure release explosion-proof structure including the exhaust hole, but this pressure release explosion-proof structure's theory of operation needs to carry out relative motion through the inside high-pressure gas promotion upper and lower half shell of battery case, makes the exhaust hole expose the back, just can realize the pressure release explosion-proof. Therefore, the riveting structure for assembling the upper and lower half shells needs to reserve a large space for the relative movement of the upper and lower half shells.

In a shell and cover plate combined welding structure in the prior art, a cover plate of the structure generally adopts a riveted or insulating material sealing structure, the requirements of insulation, sealing and enough structural strength need to be simultaneously ensured under the current technical condition, and the structure with the thickness of less than 1mm is difficult to manufacture, so that the utilization rate of the internal space of the structure is low. In addition, the structure needs precise laser welding in a good matching state of the shell and the cover plate, the requirements on the structure precision and the manufacturing process are high, the production efficiency is low, and the cost is high.

Among the prior art, casing and apron combination welded structure's explosion-proof pressure release structure pressure release pressure is difficult to the accurate control, and can form the blasting at the pressure release in-process and splash, is difficult to guarantee external personnel's safety.

Disclosure of Invention

An object of the present application is to provide a housing sealing structure and a battery, which can optimize the sealing structure of a housing in a battery and reduce the manufacturing cost.

In order to achieve the above-mentioned objects,

in a first aspect, the present invention provides a housing seal structure comprising: the sealing device comprises a cover plate, an elastic sealing element and a shell body, wherein the elastic sealing element is wrapped at the edge part of the cover plate; the shell body comprises a shell bottom plate and a frame, one end of the frame is connected with the shell bottom plate, and a plurality of positions on the other end of the frame are bent to form fixing grooves; wherein the cover plate is connected to the fixing groove through the elastic sealing member.

In one embodiment, the frame includes: the shell bottom plate comprises a first pipe section, a first bent part, a second pipe section, a second bent part and a third pipe section, wherein one end of the first pipe section is connected with the shell bottom plate, and the other end of the first pipe section extends towards the direction far away from the shell bottom plate; one end of the first bending part is connected with the first pipe section, and the other end of the first bending part extends outwards; one end of the second pipe section is connected with the first bending part, and the other end of the second pipe section extends towards the direction close to the shell bottom plate; one end of the second bending part is connected with the second pipe section, and the other end of the second bending part extends outwards; one end of the third pipe section is connected with the second bending part, and the other end of the third pipe section extends towards the direction far away from the shell bottom plate; the length of the third pipe section is greater than that of the second pipe section, and the first bending part, the second pipe section, the second bending part and the third pipe section form the fixing groove.

In an embodiment, the frame further includes: and one end of the third bending part is connected with the third pipe section, and the other end of the third bending part extends inwards.

In an embodiment, the frame further includes: the connecting ring piece is connected with the third bending part; the elastic sealing element is connected with an extension elastic ring piece, and the extension elastic ring piece is clamped between the connecting ring piece and the cover plate.

In one embodiment, a bending protrusion is arranged on one surface of the cover plate, which is far away from the shell bottom plate; the connecting ring piece is provided with a bending groove matched with the bending bulge; when the extension elastic ring piece is clamped between the connecting ring piece and the cover plate, the extension elastic ring piece is extruded to form a first matching recess matched with the bending protrusion and a first matching protrusion extending into the bending groove.

In an embodiment, a surface of the third bending portion is an arc-shaped curved surface; the edge part of the cover plate is provided with a first round angle matched with the third bending part; when the elastic sealing element is abutted to the third bending part, the elastic sealing element is extruded to form a third matching recess matched with the first fillet and a third matching protrusion extending into the third bending part.

In one embodiment, the surface of the first bending part is an arc-shaped curved surface; the size of a gap between the first bending part and the third pipe section is sequentially increased along the direction far away from the shell bottom plate; when the elastic sealing element is abutted to the first bending part, the elastic sealing element is extruded to form a second matching recess matched with the first bending part and a second matching protrusion extending into the gap.

In one embodiment, the edge portion of the cover plate includes a first annular body and a second annular body, one end of the first annular body is connected to the second annular body, and the other end of the first annular body extends toward the shell bottom plate; when the cover plate is connected to the fixing groove through the elastic sealing element, the first annular body is clamped between the second pipe section and the third pipe section through the elastic sealing element.

In an embodiment, at least one pressure relief through hole is formed in the frame and located at the fixing groove.

In a second aspect, the present invention provides a battery comprising: a housing seal structure and an electrode, the housing seal structure being the housing seal structure of any one of the preceding embodiments; the electrode is arranged in the shell sealing structure.

Compared with the prior art, the beneficial effect of this application is:

this application has optimized the seal structure of casing in the battery, can wrap up elastic sealing element in the edge part of apron earlier, will wrap up elastic sealing element's apron again pack into fixed recess in, make apron and shell body sealed can, simplified assembly process, easily operation. Moreover the fixed recess of this application is the casing and is located bending type for the casing for the bending section that the casing has is protruding and sunken can form a plurality of compression ratio sudden change regions with elastic sealing element, forms the sealed route of curve and makes sealed effect more reliable.

In this application, the frame includes first pipeline section, first kink, second pipeline section, second kink, third pipeline section and third kink to the department of bending has set up the bearing structure when the riveting of casing seal structure, is favorable to the third pipeline section stable of deformation when the riveting shaping, makes the riveting sealed effect more reliable.

In addition, at least one pressure relief through hole is formed in the frame and located in the fixing groove, so that the elastic sealing element has an explosion-proof pressure relief function related to elastic deformation (compression rate) of the elastic sealing element, and explosion caused by overlarge air pressure in the battery can be prevented; and because the casing seal structure compression ratio of this application is relevant deformation less, so the explosion-proof pressure release sensitivity of this application is higher, only needs less deformation space can realize explosion-proof pressure release action.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a battery according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram illustrating an internal structure of a battery according to an embodiment of the present disclosure.

Fig. 3a is a cross-sectional view of a housing seal structure shown in an embodiment of the present application.

Fig. 3b is an enlarged view of a portion a of fig. 3a according to an embodiment of the present disclosure.

Fig. 3c is an exploded view of a housing seal arrangement according to an embodiment of the present application.

Fig. 4a is a cross-sectional view of a housing seal structure shown in an embodiment of the present application.

Fig. 4B is an enlarged view of a portion B of fig. 4a according to an embodiment of the present disclosure.

Fig. 4c is an exploded view of a housing seal arrangement according to an embodiment of the present application.

Fig. 5a is a cross-sectional view of a housing seal arrangement shown in an embodiment of the present application.

Fig. 5b is an enlarged view of a portion C of fig. 5a according to an embodiment of the present application.

Fig. 5c is an exploded view of a housing seal arrangement according to an embodiment of the present application.

Fig. 6a is a cross-sectional view of a housing seal arrangement shown in an embodiment of the present application.

Fig. 6b is an enlarged view of a portion D of fig. 6a according to an embodiment of the present disclosure.

Fig. 6c is an exploded view of a housing seal arrangement according to an embodiment of the present application.

Icon: 1-a battery; 12-a battery material; 13-a housing seal arrangement; 200-a cover plate; 200 a-the outer surface of the cover plate; 200 b-the inner surface of the cover plate; 200 c-side surface of cover plate; 210-edge portion of cover plate; 211-a first annular body; 212-a second annular body; 220-middle part of cover plate; 230-bending a bulge; 240-first rounded corner; 300-an elastomeric seal; 310-a first seal; 320-a second seal; 330-a third seal; 340-extending the elastic ring sheet; 350-a first raised edge; 360-a second raised edge; 301-a first mating recess; 302-a first mating protrusion; 303-a second mating recess; 304-a second mating protrusion; 305-a third mating recess; 306-a third mating protrusion; 400-shell body; 410-housing bottom plate; 420-a frame; 430-an accommodation cavity; 440-bending the groove; 450-a fixing groove; 460-pressure relief through holes; 480-a gap; 401 — a first pipe section; 402-a first bend; 403-a second pipe section; 404-a second bend; 405-a third tube section; 406-a third bend; 407-connecting ring sheet.

Detailed Description

The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a battery 1 according to an embodiment of the present application. A battery 1 includes: a case sealing structure 13, and a battery material 12 (see fig. 2) provided in the case sealing structure 13. The case sealing structure 13 includes a cover plate 200 and a case body 400 that are fitted to each other, and the battery 1 may be a lithium ion battery or other batteries such as a silver oxide battery.

In this embodiment, the housing sealing structure 13 has a larger diameter and a smaller thickness, and may be a button-type battery case with an outer dimension like a small button, and in another embodiment, the housing sealing structure 13 may also be a cylindrical battery case, a square battery case or a special-shaped battery case. The case sealing structure 13 can be used for sealing portions of other devices in addition to the battery 1.

Fig. 2 is a schematic diagram of an internal structure of a battery 1 according to an embodiment of the present application. The battery material 12 includes an electrode, an electrolyte, and the like, and the battery material 12 such as the electrode, the electrolyte, and the like is provided in the case seal structure 13. The housing seal structure 13 includes: the sealing structure comprises a cover plate 200, an elastic sealing element 300 and a shell body 400, wherein the elastic sealing element 300 is wrapped at the edge part 210 of the cover plate; the case body 400 has an accommodating cavity 430, one end of the accommodating cavity is open, the other end of the accommodating cavity is closed, the case body 400 is bent at a plurality of positions of the open end to form a fixing groove 450 for riveting forming, and the cover plate 200 is connected to the fixing groove 450 through the elastic sealing element 300.

In one operation, the housing body 400 is connected to one tab of the electrode, and the cover plate 200 is connected to the other tab of the electrode; battery materials 12 such as electrodes, electrolyte, etc. are put into the accommodating chamber 430 of the case body 400; the elastic sealing member 300 may be wrapped around the edge portion 210 of the cover plate, and then the cover plate 200 wrapped around the elastic sealing member 300 is installed in the fixing groove 450, so that the cover plate 200 and the case body 400 are sealed. In this embodiment, the cover plate 200, the elastic sealing member 300 and the housing body 400 may be manufactured and assembled. Therefore, the sealing structure of the case in the battery 1 is optimized, the assembly process is simplified, and the operation is easy. And thus the manufacturing cost is reduced and the assembly process is simplified. Moreover, the fixing groove of the embodiment is formed by bending the shell at the frame, so that the bending section of the shell is provided with a plurality of compression rate mutation areas which are formed by the bulges and the depressions and the elastic sealing element, and a curve sealing route is formed to ensure that the sealing effect is more reliable.

Wherein the operation of sealing the cap plate 200 and the case body 400 may be riveting or pressing, etc. In this embodiment, the operation of sealing the cap plate 200 and the case body 400 is caulking, and the cap plate 200 is first pressed and the caulking molding operation is performed at the fixing groove 450 of the case body 400. The present embodiment generates and maintains the pressing of at least one independent region of the elastic sealing member 300 provided between the case body 400 and the cap plate 200 by the rivet deformation of the case body 400, so that the elastic sealing member 300 has a gas or liquid sealing function under a certain compression condition (compression rate). The elastic sealing member 300 is made of an insulating material, and the elastic sealing member 300 simultaneously performs the function of separating and maintaining the insulation of the positive and negative electrode parts of the battery 1.

The material of the housing body 400 may be metal, for example: iron alloy such as stainless steel and carbon steel, or aluminum alloy. The case body 400 may be manufactured by a cold forming method such as punching, pressing, bending, or the like, or may be manufactured by a powder metallurgy forming method or the like.

The elastic sealing member 300 has sealing and insulating functions. The material of the elastic sealing member 300 is plastic with elastic and insulating properties, such as: PFA (perfluoropropyl perfluorovinyl ether copolymer with polytetrafluoroethylene), PP (Polypropylene), PE (polyethylene), and other materials having elasticity and resistance to chemical corrosion and aging. The elastic sealing member 300 may be manufactured by a manufacturing method and process such as extrusion and injection molding, and in this embodiment, the elastic sealing member 300 is manufactured by an injection molding process.

The cover plate 200 is made of metal, for example: iron alloy such as stainless steel and carbon steel, or aluminum alloy. The cover plate 200 may be manufactured by a cold forming method such as stamping, pressing, bending, or the like, or may be manufactured by a powder metallurgy forming method or the like.

Please refer to fig. 3a, which is a cross-sectional view of the housing sealing structure 13 according to an embodiment of the present application. Please refer to fig. 3b, which is an enlarged view of a portion a of fig. 3a according to an embodiment of the present application. Fig. 3c is an exploded view of the housing sealing structure 13 according to an embodiment of the present application. The case body 400 includes a case bottom plate 410 and a rim 420, one end of the rim 420 is connected to the case bottom plate 410, and the other end is bent at a plurality of positions to form a fixing groove 450. The housing bottom plate 410 and the frame 420 may be integrally formed, or may be fixedly connected together by welding, riveting, or the like. The axis of the housing bottom plate 410 and the axis of the bezel 420 may or may not coincide.

A direction in which the fixing recess 450 is directed toward the case bottom plate 410 is defined as downward, a direction directed toward the receiving chamber 430 is defined as inward, and a direction facing away from the receiving chamber 430 is defined as outward.

The frame 420 includes a first tube section 401, a first bent portion 402, a second tube section 403, a second bent portion 404, a third tube section 405, and a third bent portion 406 sequentially connected from bottom to top.

One end of the first pipe section 401 is connected to the case bottom plate 410, and the other end extends in a direction away from the case bottom plate 410 (upward); one end of the first bent part 402 is connected with the first pipe section 401, and the other end extends outwards; one end of the second tube section 403 is connected to the first bent portion 402, and the other end extends toward the direction (downward) close to the bottom plate 410 of the housing; one end of the second bending part 404 is connected to the second tube section 403, and the other end extends outwards; one end of the third tube segment 405 is connected to the second bent portion 404, and the other end extends away from the bottom plate 410 (upward); the third bent portion 406 is connected to the third tube segment 405 at one end and extends inward at the other end.

The length of the third tube segment 405 is greater than that of the second tube segment 403, the inner diameter of the third tube segment 405 is greater than the outer diameter of the second tube segment 403, the inner diameter of the second tube segment 403 is greater than the outer diameter of the first tube segment 401, and the first bent portion 402, the second tube segment 403, the second bent portion 404, the third tube segment 405 and the third bent portion form a fixing groove 450.

The edge portion 210 of the cap plate has a straight plate shape, the elastic sealing member 300 includes a first sealing member 310, a second sealing member 320, and a third sealing member 330 that are integrally formed and sequentially connected, the first sealing member 310 contacts the inner surface 200b of the cap plate, the second sealing member 320 contacts the side surface 200c of the cap plate, and the third sealing member 330 contacts the outer surface 200a of the cap plate.

In an operation process, when the cover plate 200 wrapped with the elastic sealing element 300 is installed in the fixing groove 450 and riveted and sealed, the first sealing element 310 abuts against the first bending part 402 to form a first sealing area, the second sealing element 320 abuts against the inner surface of the third pipe section 405 to form a second sealing area, and the two sealing areas can form secondary sealing for the accommodating cavity 430, so that the sealing reliability is fully ensured. Furthermore, since the third bending portion 406 is disposed in the embodiment, the third sealing element 330 abuts against the third bending portion 406, so as to limit the outward movement of the cover plate 200 and improve the sealing effect. Since the edge portion 210 of the cover plate of this embodiment is in a straight plate shape, the gap left between the second tube section 403 and the third tube section 405 is not filled, and the gap can be used as a gas temporary storage space.

Wherein, when the cap plate 200 is compressed and the caulking structure is adjusted, the elastic sealing member 300 is compressed, and the sealing performance of the entire housing sealing structure 13 can be controlled by adjusting the compression degree (compression rate) of the elastic sealing member 300.

The first tube section 401, the first bent portion 402, the second tube section 403, the second bent portion 404, the third tube section 405, and the third bent portion 406 may be integrally formed, or may be fixedly connected together by welding, riveting, or the like. The first tube section 401, the first bent portion 402, the second tube section 403, the second bent portion 404, the third tube section 405, the third bent portion 406, and the shell bottom plate 410 may be coaxially disposed or may not be coaxially disposed.

In this embodiment, the first tube segment 401, the first bent portion 402, the second tube segment 403, the second bent portion 404, the third tube segment 405, the third bent portion 406 and the shell bottom plate 410 are integrally formed and coaxially disposed. The first, second and

third tube sections

401, 403, 405 are hollow cylindrical. The first bent portion 402, the second bent portion 404, and the third bent portion 406 may be curved circular ring-shaped ring pieces. In this embodiment, the frame 420 includes the first pipe section 401, the first bending portion 402, the second pipe section 403, the second bending portion 404, the third pipe section 405, and the third bending portion 406, so that the support structure for riveting the housing sealing structure 13 is provided at the bending portion, which is beneficial to the stable deformation of the third pipe section during riveting molding, and the riveting sealing effect is more reliable.

At least one pressure relief through hole 460 is formed on the frame 420 and located at the fixing groove 450. In this embodiment, the plurality of pressure relief through holes 460 are circumferentially disposed on the third pipe segment 405, and a first sealing region formed by the first sealing element 310 abutting against the first bending portion 402 is isolated from the accommodating cavity 430.

In an operation process, when the air pressure inside the battery 1 accommodating cavity 430 rises, the cover plate 200 is pushed by the outward pressure, and the housing sealing structure 13 is deformed to be turned outwards, and the deformation degree is positively correlated with the internal air pressure. At this time, the compression rate of the first sealing member 310 in the first sealing region is decreased, and the degree of the decrease is positively correlated to the magnitude of the internal pressure. When the first seal 310 in the first sealing region decreases below the sealing threshold, the seal of the housing seal structure 13 begins to fail, and a small amount of gas is vented from the gap between the first seal 310 and the first bend 402 through the pressure relief through hole 460; when the internal air pressure continues to increase, the sealing is completely failed, a large amount of gas is discharged from the gap between the first sealing element 310 and the first bending part 402 through the pressure relief through hole 460, and the gas is discharged, so that the battery 1 can be prevented from exploding due to the overlarge internal air pressure, and the related deformation of the compression rate in the shell sealing structure 13 is small, so that the explosion-proof pressure relief sensitivity of the implementation is higher, and the explosion-proof pressure relief action can be realized only by a small deformation space.

In order to facilitate the air circulation, the height of the pressure relief through hole 460 is equal to or higher than the height of the contact surface between the second sealing element 320 and the first bending part 402.

In order to facilitate the gas circulation, a second fillet is arranged at the joint of the outer surfaces of the first sealing element 310 and the second sealing element 320; in order to improve the sealing effect, a third rounded corner matching with the third bending part 406 is provided at the connection between the second sealing member 320 and the third sealing member 330.

In this embodiment, the cover plate 200 is a bent plate, the edge portion 210 of the cover plate is a straight plate, the middle portion 220 of the cover plate is a boss, and the boss is in a hollow circular truncated cone shape, the elastic sealing element 300 further includes a first raised edge 350 connected to the third sealing element 330, and the first raised edge 350 is sandwiched between the third bent portion 406 of the frame and the cover plate 200, and is configured to contact with the edge of the third bent portion 406, the side surface of the boss, and the bent portion of the middle portion 220 of the cover plate and the edge portion 210 of the cover plate. Therefore, the sealing effect can be improved by the arrangement of the first raised edge 350 and the middle portion 220 of the cover plate. The first raised edge 350, the first sealing member 310, the second sealing member 320, and the third sealing member 330 may be integrally formed.

Please refer to fig. 4a, which is a cross-sectional view of the housing sealing structure 13 according to an embodiment of the present application. Please refer to fig. 4B, which is an enlarged view of a portion B of fig. 4a according to an embodiment of the present application. Fig. 4c is an exploded view of the housing sealing structure 13 according to an embodiment of the present application. The edge portion 210 of the cover plate has an "L" shape in longitudinal section, and includes a first annular body 211 and a second annular body 212, the first annular body 211 being connected to the second annular body 212 at one end, and extending toward the case bottom plate 410 (downward) at the other end. First annular body 211 and second annular body 212 may be integrally formed, or may be fixedly connected by welding or the like. In this embodiment, the first annular body 211 is in the shape of a circular tube, and the second annular body 212 is in the shape of a circular ring sheet.

When the cover plate 200 is coupled to the fixing groove 450 by the elastic sealing member 300, the first annular body 211 is sandwiched between the second tube segment 403 and the third tube segment 405 by the elastic sealing member 300. So set up, this embodiment riveting sealing path is longer, and is sealed effectual, and the reliability is high, and shell body 400 wall thickness can design thinner, highly can design lower, and battery 1 size can tend to more miniaturization.

Please refer to fig. 5a, which is a cross-sectional view of the housing sealing structure 13 according to an embodiment of the present application. Please refer to fig. 5b, which is an enlarged view of a portion C of fig. 5a according to an embodiment of the present application. Fig. 5c is an exploded view of the housing sealing structure 13 according to an embodiment of the present application. The cover plate 200 is a straight plate member, the edge portion 210 of the cover plate is a straight plate shape, the middle portion 220 of the cover plate is a straight plate shape, and the edge portion 210 of the cover plate and the middle portion 220 of the cover plate are at the same level.

Bezel 420 also includes: a connecting ring 407, wherein the connecting ring 407 is connected to the third bending portion 406; the elastic sealing element 300 is connected with an extension elastic ring piece 340, and the extension elastic ring piece 340 is clamped between the connecting ring piece 407 and the cover plate 200. So set up, this embodiment riveting sealing path is longer, and is sealed effectual, and the reliability is high, and shell body 400 wall thickness can design thinner, highly can design lower, and battery 1 size can tend to more miniaturization.

The surface of the third bending part 406 is an arc-shaped curved surface; the edge portion 210 of the cover plate has a first rounded corner 240 fitting the third bent portion 406. The first rounded corner 240 is disposed at the intersection of the outer surface 200a of the cap plate and the side surface 200c of the cap plate.

When the elastic sealing member 300 abuts against the third bending portion 406, the elastic sealing member 300 is pressed to form a third engaging recess 305 adapted to the first rounded corner 240 and a third engaging protrusion 306 extending into the third bending portion 406. With this arrangement, the third mating recess 305 and the third mating protrusion 306 can generate a locally large compression, and the third mating recess 305 and the third mating protrusion 306 can be used as a key rivet point.

The surface of the first bent portion 402 is an arc-shaped curved surface; the size of the gap 480 between the first bent portion 402 and the third tube segment 405 increases gradually in a direction away from the shell bottom plate 410, so as to form a trumpet-like void structure.

When the elastic sealing member 300 abuts against the first bent portion 402, the elastic sealing member 300 is pressed to form a second engaging recess 303 adapted to the first bent portion 402 and a second engaging protrusion 304 extending into a gap 480 between the first bent portion 402 and the third tube segment 405. With this configuration, in the present embodiment, the second fitting recess 303 and the second fitting protrusion 304 may be riveted and pressed, and the second fitting recess 303 and the second fitting protrusion 304 may be used as a key sealing point, wherein in the present embodiment, the gap 480 between the first bending portion 402 and the third pipe segment 405 is a trumpet-shaped structure, which may facilitate the formation of the second fitting protrusion 304, so as to generate a gradually enhanced sealing effect.

The second mating protrusion 304, the second mating recess 303, the third mating recess 305 and the third mating protrusion 306 may be formed during the molding process of the elastic sealing member 300, or may be formed by pressing after the housing sealing structure 13 is assembled.

In this embodiment, the cover plate 200 is a straight plate, the elastic sealing element 300 further includes a second raised edge 360 connected to the extended elastic ring piece 340, and the second raised edge 360 contacts with an edge of the third bending portion 406 to improve the sealing effect. Wherein, the second raised edge 360, the extended elastic ring piece 340, the first sealing member 310, the second sealing member 320 and the third sealing member 330 may be integrally formed.

Please refer to fig. 6a, which is a cross-sectional view of the housing sealing structure 13 according to an embodiment of the present application. Please refer to fig. 6b, which is an enlarged view of a portion D of fig. 6a according to an embodiment of the present application. Fig. 6c is an exploded view of the housing sealing structure 13 according to an embodiment of the present application. A bending bulge 230 is arranged on one surface of the cover plate 200, which is far away from the shell bottom plate 410; the bending protrusion 230 may be an additive convex structure formed by integral molding, or a non-additive convex structure formed by bending. In this embodiment, the cover plate 200 is a bent plate, the edge portion 210 of the cover plate is a straight plate, the middle portion 220 of the cover plate is a straight plate, and the edge portion 210 of the cover plate and the middle portion of the cover plate 200 are inclined with respect to each other to form a bent protrusion 230.

The connecting ring piece 407 is provided with a bending groove 440 matched with the bending bulge 230, and the curvature of the bending groove 440 is greater than that of the bending bulge 230.

When the elastic extension ring 340 is clamped between the connection ring 407 and the cover plate 200, the elastic extension ring 340 is pressed to form a first engaging recess 301 adapted to the bending protrusion 230 and a first engaging protrusion 302 extending into the bending groove 440. With this arrangement, the present embodiment can generate a locally large compression at the first mating recess 301 and the first mating protrusion 302, and the first mating recess 301 and the first mating protrusion 302 can be used as a key rivet point.

The first fitting recess 301 and the first fitting protrusion 302 may be formed during the molding process of the elastic sealing member 300, or may be formed by pressing after the housing sealing structure 13 is assembled.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A housing seal structure, comprising:

a cover plate;

the elastic sealing element is wrapped at the edge part of the cover plate; and

the shell body comprises a shell bottom plate and a frame, wherein one end of the frame is connected with the shell bottom plate, and a plurality of positions at the other end of the frame are bent to form fixing grooves;

wherein the cover plate is connected to the fixing groove through the elastic sealing member.

2. The housing seal arrangement of claim 1, wherein said bezel comprises:

one end of the first pipe section is connected with the shell bottom plate, and the other end of the first pipe section extends towards the direction far away from the shell bottom plate;

one end of the first bending part is connected with the first pipe section, and the other end of the first bending part extends outwards;

one end of the second pipe section is connected with the first bending part, and the other end of the second pipe section extends towards the direction close to the shell bottom plate;

one end of the second bending part is connected with the second pipe section, and the other end of the second bending part extends outwards; and

one end of the third pipe section is connected with the second bending part, and the other end of the third pipe section extends towards the direction far away from the shell bottom plate;

the length of the third pipe section is greater than that of the second pipe section, and the first bending part, the second pipe section, the second bending part and the third pipe section form the fixing groove.

3. The housing seal arrangement of claim 2, wherein said bezel further comprises:

and one end of the third bending part is connected with the third pipe section, and the other end of the third bending part extends inwards.

4. The housing seal arrangement of claim 3, wherein said bezel further comprises:

the connecting ring piece is connected with the third bending part;

the elastic sealing element is connected with an extension elastic ring piece, and the extension elastic ring piece is clamped between the connecting ring piece and the cover plate.

5. The housing seal arrangement of claim 4, wherein said cover plate is provided with a bent projection on a side facing away from said housing bottom plate; the connecting ring piece is provided with a bending groove matched with the bending bulge;

when the extension elastic ring piece is clamped between the connecting ring piece and the cover plate, the extension elastic ring piece is extruded to form a first matching recess matched with the bending protrusion and a first matching protrusion extending into the bending groove.

6. The housing seal structure according to claim 4, wherein a surface of the third bent portion is a circular arc-shaped curved surface; the edge part of the cover plate is provided with a first round angle matched with the third bending part;

when the elastic sealing element is abutted to the third bending part, the elastic sealing element is extruded to form a third matching recess matched with the first fillet and a third matching protrusion extending into the third bending part.

7. The housing seal structure according to claim 2, wherein the surface of the first bent portion is a circular arc-shaped curved surface;

the size of a gap between the first bending part and the third pipe section is sequentially increased along the direction far away from the shell bottom plate;

when the elastic sealing element is abutted to the first bending part, the elastic sealing element is extruded to form a second matching recess matched with the first bending part and a second matching protrusion extending into the gap.

8. The housing seal arrangement of claim 2, wherein the edge region of the cover plate includes a first annular body and a second annular body, the first annular body being connected at one end to the second annular body and extending at the other end toward the housing bottom plate;

when the cover plate is connected to the fixing groove through the elastic sealing element, the first annular body is clamped between the second pipe section and the third pipe section through the elastic sealing element.

9. The housing seal structure according to any one of claims 1 to 8, wherein at least one pressure relief through hole is provided on the rim at the fixing groove.

10. A battery, comprising:

a housing seal structure according to any one of claims 1 to 9; and

and the electrode is arranged in the shell sealing structure.