CN112242579B

CN112242579B - Shell sealing structure and battery

Info

Publication number: CN112242579B
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: 2025-07-01
Anticipated expiration: 2040-11-20
Also published as: CN112242579A

Abstract

The application relates to a shell sealing structure and a battery, wherein the shell sealing structure comprises a cover plate, an elastic sealing piece and a shell body, and the elastic sealing piece 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, the other end of the frame is bent at a plurality of positions to form a fixing groove, wherein the cover plate is connected to the fixing groove through an elastic sealing piece, and at least one pressure relief through hole is formed in the frame and located at the fixing groove. The application also discloses a pressure relief through hole, which enables the application to have an explosion-proof pressure relief function related to the elastic deformation of the elastic sealing element, and the application has higher sensitivity of explosion-proof pressure relief because the related deformation of the compression ratio of the sealing structure of the shell is smaller.

Description

Shell 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, the battery is widely applied to various occasions as a movable power supply and becomes an indispensable article for people's life.

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

In addition, in the prior art, the upper half shell and the lower half shell are combined and riveted, radial extrusion riveting is carried out on the overlapping area of the upper half shell and the lower half shell 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. The part has insufficient supporting strength, so that the extrusion riveting is insufficient, the rebound is easy, and the compression ratio of the sealing piece after the riveting is insufficient. Therefore, the sealing performance is unreliable after riveting, and the leakage of the battery in the subsequent use process is easy to cause.

In the prior art, some upper and lower half shell combined riveting structures are also provided with a pressure relief explosion-proof structure comprising an exhaust hole, but the working principle of the pressure relief explosion-proof structure is that the upper and lower half shells are pushed to move relatively by high-pressure gas in the battery shell, so that the exhaust hole is exposed, and then the pressure relief explosion-proof structure can be realized. Therefore, the upper and lower half shell combined riveting structure needs to reserve a larger space for the relative movement of the upper and lower half shells.

The cover plate of the structure generally adopts a structure of riveting or insulating material sealing, the requirements of insulation, sealing and enough structural strength are required to be ensured simultaneously under the current technical conditions, 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 lower. In addition, the structure requires the shell and the cover plate to be precisely welded in a good matching state, and has higher structural precision requirement and manufacturing process requirement, low production efficiency and high cost.

In the prior art, the pressure relief pressure of an explosion-proof pressure relief structure of a shell and cover plate combined welding structure is difficult to accurately control, explosion splashing can be formed in the pressure relief process, and the safety of external personnel is difficult to ensure.

Disclosure of Invention

The application aims to provide a shell sealing structure and a battery, which can optimize the sealing structure of a shell in the battery and reduce the manufacturing cost.

In order to achieve the above-mentioned object,

The shell sealing structure comprises a cover plate, an elastic sealing piece and a shell body, wherein the elastic sealing piece is wrapped at the edge 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 the other end of the frame is bent at a plurality of positions to form a fixing groove, and the cover plate is connected with the fixing groove through the elastic sealing piece.

In an embodiment, the frame comprises a first pipe section, a first bending part, a second pipe section, a second bending part and a third pipe section, wherein one end of the first pipe section is connected with the shell bottom plate, the other end of the first pipe section extends towards the direction away from the shell bottom plate, one end of the first bending part is connected with the first pipe section, the other end of the second pipe section extends outwards, one 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, the other end of the second bending part extends outwards, one end of the third pipe section is connected with the second bending part, the other end of the third pipe section extends towards the direction away from the shell bottom plate, and the length of the third pipe section is larger 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 a third bending portion, one end of the third bending portion is connected to the third pipe section, and the other end extends inward.

In an embodiment, the frame further comprises a connecting ring piece, wherein the connecting ring piece is connected with the third bending part, the elastic sealing piece is connected with an extending elastic ring piece, and the extending elastic ring piece is clamped between the connecting ring piece and the cover plate.

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

In an embodiment, the surface of the third bending part is a circular arc curved surface, the edge part of the cover plate is provided with a first round corner matched with the third bending part, and when the elastic sealing element is propped against the third bending part, the elastic sealing element is extruded to form a third matching concave matched with the first round corner and a third matching convex extending into the third bending part.

In an embodiment, the surface of the first bending part is a circular arc-shaped curved surface, the size of the gap between the first bending part and the third pipe section is gradually increased along the direction away from the shell bottom plate, and when the elastic sealing element is propped against the first bending part, the elastic sealing element is extruded to form a second matching concave matched with the first bending part and a second matching convex extending into the gap.

In an 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 with the second annular body, and the other end extends towards the bottom plate of the shell, wherein 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 disposed on the frame and located at the fixing groove.

In a second aspect, the invention provides a battery comprising a housing seal arrangement, as described in any of the preceding embodiments, and an electrode disposed within the housing seal arrangement.

Compared with the prior art, the application has the beneficial effects that:

According to the application, the sealing structure of the shell in the battery is optimized, the elastic sealing element can be wrapped at the edge part of the cover plate, and then the cover plate wrapped with the elastic sealing element is arranged in the fixing groove, so that the cover plate and the shell body are sealed, the assembly process is simplified, and the operation is easy. In addition, the fixing groove is formed by bending the shell at the frame, so that the bending section protrusions and depressions of the shell can form a plurality of compression ratio abrupt change areas with the elastic sealing element to form a curve sealing route, and the sealing effect is more reliable.

According to the application, the frame comprises the first pipe section, the first bending part, the second pipe section, the second bending part, the third pipe section and the third bending part, so that the supporting structure for riveting the shell sealing structure is arranged at the bending part, the deformation of the third pipe section is stable during riveting and forming, and the riveting sealing effect is more reliable.

In addition, the frame is provided with at least one pressure relief through hole at the fixed groove, so that the explosion-proof pressure relief device has an explosion-proof pressure relief function related to the elastic deformation (compression ratio) of the elastic sealing element, explosion caused by overlarge air pressure in the battery can be prevented, and the explosion-proof pressure relief device has higher sensitivity and can realize explosion-proof pressure relief action only by a smaller deformation space because the related deformation of the compression ratio of the sealing structure of the shell is smaller.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view illustrating a structure of a battery according to an embodiment of the present application.

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

Fig. 3a is a cross-sectional view of a housing seal arrangement according to an embodiment of the application.

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

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 arrangement according to an embodiment of the application.

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

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 according to an embodiment of the application.

Fig. 5b is an enlarged view of 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 according to an embodiment of the application.

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

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

The icons 1-battery, 12-battery material, 13-case sealing structure, 200-cover plate, 200 a-cover plate outer surface, 200 b-cover plate inner surface, 200 c-cover plate side surface, 210-cover plate edge portion, 211-first annular body, 212-second annular body, 220-cover plate middle portion, 230-bending protrusion, 240-first round corner, 300-elastic sealing member, 310-first sealing member, 320-second sealing member, 330-third sealing member, 340-extending elastic ring piece, 350-first flange, 360-second flange, 301-first fitting recess, 302-first fitting protrusion, 303-second fitting recess, 304-second fitting protrusion, 305-third fitting recess, 306-third fitting protrusion, 400-case body, 410-case bottom plate, 420-frame, 430-accommodating cavity, 440-bending groove, 450-fixing groove, 460-pressure release through hole, 480-slit, 401-first tube segment, 402-first bending portion, 403-second tube segment, 405-third bending portion, 405-third tube segment, and 404-third bending portion.

Detailed Description

The terms "first," "second," "third," and the like are used merely for distinguishing between descriptions and not for indicating a sequence number, nor are they to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its 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, directions or positional relationships indicated by terms such as "inner", "outer", "left", "right", "upper", "lower", etc., are based on directions or positional relationships shown in the drawings, or directions or positional relationships conventionally put in use of the product of the application, are merely for convenience of describing the present application and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present application.

In the description of the present application, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or communicate between the interior of two elements.

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

Fig. 1 is a schematic diagram of a battery 1 according to an embodiment of the 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 housing sealing structure 13 includes a cover plate 200 and a housing body 400 that are matched with 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 seal structure 13 has a larger diameter and a thinner thickness, and may be a button cell case with an external dimension similar to a small button, and in other embodiments, the housing seal structure 13 may be a cylindrical cell case, a square cell case, or a special cell case. The case sealing structure 13 may be applied to a sealing portion of other devices in addition to the battery 1.

Fig. 2 is a schematic diagram showing an internal structure of a battery 1 according to an embodiment of the 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 sealing structure 13. The shell sealing structure 13 comprises a cover plate 200, an elastic sealing element 300 and a shell body 400, wherein the elastic sealing element 300 is wrapped on the edge part 210 of the cover plate, the shell body 400 is provided with a containing cavity 430, one end of the containing cavity is provided with an opening, the other end of the containing cavity is provided with a closed arrangement, the shell body 400 is bent at a plurality of positions of the opening end to form a fixing groove 450 for riveting forming, and the cover plate 200 is connected with the fixing groove 450 through the elastic sealing element 300.

In an operation process, the case body 400 is connected with one tab of the electrode and the cover plate 200 is connected with the other tab of the electrode, the battery material 12 such as the electrode, the electrolyte and the like is placed in the accommodating cavity 430 of the case body 400, the elastic sealing element 300 can be wrapped at the edge part 210 of the cover plate, and then the cover plate 200 wrapped with the elastic sealing element 300 is placed in the fixing groove 450, so that the cover plate 200 and the case body 400 are sealed. In this embodiment, the molded cover 200, the elastic sealing member 300 and the case body 400 may be manufactured and then assembled. The present embodiment optimizes the sealing structure of the case in the battery 1, simplifies the assembly process, and is easy to operate. And thereby reducing manufacturing costs and simplifying assembly processes. Furthermore, the fixing groove is formed by bending the shell at the frame, so that the bending section protrusions and depressions of the shell can form a plurality of compression ratio abrupt change areas with the elastic sealing element to form a curve sealing route, and the sealing effect is more reliable.

The operation of sealing the cover plate 200 and the case body 400 may be caulking, pressing, or the like. In this embodiment, the operation of sealing the cover plate 200 and the case body 400 is a caulking operation, the cover plate 200 is first pressed, and the caulking forming 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 area 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 serves to separate and maintain the insulating function of the positive and negative electrode members of the battery 1.

The material of the case body 400 may be metal, such as iron alloy including stainless steel and carbon steel, or aluminum alloy. The case body 400 may be manufactured by a cold forming method such as stamping, extruding, bending, or a powder metallurgy forming method.

The elastic sealing member 300 has sealing and insulating effects. The elastic sealing member 300 is made of plastic having elastic and insulating properties, such as PFA (Perfluoroalkoxy, a copolymer of small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene), PP (Polypropylene), PE (polyethylene) and the like, which are elastic and resistant to chemical corrosion and aging. The elastic sealing member 300 may be manufactured by extrusion, injection molding, or other manufacturing methods and processes, and in this embodiment, the elastic sealing member 300 is manufactured by injection molding.

The cover plate 200 is made of metal, such as iron alloy or aluminum alloy, such as stainless steel, carbon steel, etc. The cover plate 200 may be manufactured by a cold forming method such as stamping, extruding, bending, or a powder metallurgy forming method.

Referring to fig. 3a, a cross-sectional view of a housing seal arrangement 13 according to an embodiment of the application is shown. Referring to fig. 3b, an enlarged view of a portion a of fig. 3a is shown according to an embodiment of the present application. Referring to fig. 3c, an exploded view of the housing seal arrangement 13 according to an embodiment of the application is shown. The case body 400 includes a case bottom plate 410 and a frame 420, one end of the frame 420 is connected with the case bottom plate 410, and the other end is bent at a plurality of positions to form a fixing groove 450. The 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 floor 410 and the axis of the bezel 420 may or may not be coincident.

The direction in which the fixing groove 450 is directed toward the case bottom plate 410 is defined as downward, the direction in which it is directed toward the receiving chamber 430 is defined as inward, and the direction away from the receiving chamber 430 is defined as outward.

The frame 420 includes a first pipe segment 401, a first bending portion 402, a second pipe segment 403, a second bending portion 404, a third pipe segment 405, and a third bending portion 406, which are sequentially connected from bottom to top.

One end of the first tube section 401 is connected to the case bottom plate 410, the other end thereof extends in a direction away from the case bottom plate 410 (upward), one end of the first bending portion 402 is connected to the first tube section 401, the other end thereof extends outward, one end of the second tube section 403 is connected to the first bending portion 402, the other end thereof extends in a direction close to the case bottom plate 410 (downward), one end of the second bending portion 404 is connected to the second tube section 403, the other end thereof extends outward, one end of the third tube section 405 is connected to the second bending portion 404, the other end thereof extends in a direction away from the case bottom plate 410 (upward), and one end of the third bending portion 406 is connected to the third tube section 405, the other end thereof extends inward.

The third tube segment 405 has a length greater than the length of the second tube segment 403, the third tube segment 405 has an inner diameter greater than the outer diameter of the second tube segment 403, the second tube segment 403 has an inner diameter greater than the outer diameter of the first tube segment 401, and the first bend 402, the second tube segment 403, the second bend 404, the third tube segment 405, and the third bend form a securing groove 450.

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

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

Wherein the elastic sealing member 300 is compressed when the cap plate 200 is compressed and the rivet structure is adjusted, 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 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 may be integrally formed, or may be fixedly connected together by welding, riveting or the like. The first pipe segment 401, the first bending portion 402, the second pipe segment 403, the second bending portion 404, the third pipe segment 405, the third bending portion 406, and the case bottom plate 410 may be coaxially disposed or may be non-coaxially disposed.

In this embodiment, 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, the third bending portion 406 and the bottom shell 410 are integrally formed and coaxially arranged. The first tube segment 401, the second tube segment 403, and the third tube segment 405 are hollow cylinders. The first bend 402, the second bend 404, and the third bend 406 may be curved annular ring segments. 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 a supporting structure of the housing sealing structure 13 during riveting is disposed at the bending portion, which is favorable for the deformation stability of the third pipe section during riveting and forming, and makes the riveting sealing effect more reliable.

At least one pressure relief through hole 460 is provided 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 in the third pipe segment 405, and a first sealing area formed by the first sealing member 310 abutting against the first bending portion 402 is isolated from the accommodating cavity 430.

During operation, when the internal air pressure of the accommodating chamber 430 of the battery 1 rises, the cover plate 200 is pushed by the external pressure, and the housing sealing structure 13 is deformed outwards, and the deformation degree is positively related to the internal air pressure. At this time, the compression rate of the first seal 310 in the first sealing region is reduced, the degree of which is positively correlated with the magnitude of the internal pressure. When the first sealing element 310 in the first sealing area is reduced below the sealing threshold, the sealing of the shell sealing structure 13 begins to fail, a small 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, when the internal air pressure continues to increase, the sealing completely fails, 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 explosion of the battery 1 due to overlarge internal air pressure can be prevented, and because the related deformation of the compression ratio in the shell sealing structure 13 of the embodiment is smaller, the explosion-proof pressure relief sensitivity of the embodiment is higher, and only a smaller deformation space is needed to realize explosion-proof pressure relief action.

The height of the pressure release 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 to facilitate the gas circulation.

In order to facilitate the gas circulation, a second rounded corner is arranged at the connection position of the outer surfaces of the first sealing element 310 and the second sealing element 320, and in order to improve the sealing effect, a third rounded corner matched with the third bending part 406 is arranged at the connection position of the second sealing element 320 and the third sealing element 330.

In this embodiment, the cover 200 is a bent plate, the edge portion 210 of the cover is in a straight plate shape, the middle portion 220 of the cover is in a boss shape, the boss is in a hollow truncated cone shape, the elastic sealing member 300 further includes a first raised edge 350 connected to the third sealing member 330, and the first raised edge 350 is sandwiched between the third bending portion 406 of the frame and the cover 200 and is used for contacting with the edge of the third bending portion 406, the side surface of the boss, and the turning portion of the middle portion 220 of the cover and the edge portion 210 of the cover. The provision of the first flange 350 and the middle portion 220 of the cover plate can enhance the sealing effect. Wherein the first flange 350, the first sealing member 310, the second sealing member 320, and the third sealing member 330 may be integrally formed.

Referring to fig. 4a, a cross-sectional view of a housing seal arrangement 13 according to an embodiment of the application is shown. Referring to fig. 4B, an enlarged view of a portion B of fig. 4a is shown according to an embodiment of the present application. Referring to fig. 4c, an exploded view of the housing seal arrangement 13 according to an embodiment of the application is shown. The longitudinal section of the edge portion 210 of the cover plate is "L" shaped, including a first annular body 211 and a second annular body 212, and the first annular body 211 has one end connected to the second annular body 212 and the other end extending (downward) toward the case bottom plate 410. The first annular body 211 and the 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 a circular tube shape, and the second annular body 212 is in a circular ring sheet shape.

When the cover plate 200 is connected to the fixing groove 450 by the elastic sealing member 300, the first annular body 211 is sandwiched between the second pipe section 403 and the third pipe section 405 by the elastic sealing member 300. So set up, this embodiment rivet seal route is longer, and sealed effectual, the reliability is high, and shell body 400 wall thickness can design thinner, the height can design lowerly, battery 1 size can tend to be miniaturized more.

Referring to fig. 5a, a cross-sectional view of a housing seal arrangement 13 according to an embodiment of the application is shown. Referring to fig. 5b, an enlarged view of the portion C of fig. 5a is shown according to an embodiment of the present application. Referring to fig. 5c, an exploded view of the housing seal arrangement 13 according to an embodiment of the application is shown. The cover 200 is a straight plate, the edge portion 210 of the cover is in a straight plate shape, the middle portion 220 of the cover is in a straight plate shape, and the edge portion 210 of the cover and the middle portion 220 of the cover are at the same level.

The frame 420 further includes a connecting ring piece 407, where the connecting ring piece 407 is connected to the third bending portion 406, and the elastic sealing member 300 is connected to an extending elastic ring piece 340, and the extending elastic ring piece 340 is sandwiched between the connecting ring piece 407 and the cover plate 200. So set up, this embodiment rivet seal route is longer, and sealed effectual, the reliability is high, and shell body 400 wall thickness can design thinner, the height can design lowerly, battery 1 size can tend to be miniaturized more.

The surface of the third bending part 406 is a circular arc curved surface, and the edge part 210 of the cover plate is provided with a first round corner 240 matched with the third bending part 406. The first rounded corner 240 is provided at the junction of the outer surface 200a of the cover plate and the side surface 200c of the cover plate.

When the elastic sealing member 300 abuts against the third bending portion 406, the elastic sealing member 300 is extruded to form a third matching recess 305 adapted to the first rounded corner 240, and a third matching protrusion 306 extending into the third bending portion 406. So configured, the present embodiment can produce a locally greater compression at the third mating recess 305 and the third mating protrusion 306, and the third mating recess 305 and the third mating protrusion 306 can serve as critical rivet points.

The surface of the first bending part 402 is a circular arc curved surface, and the size of the gap 480 between the first bending part 402 and the third pipe section 405 increases gradually along the direction away from the bottom plate 410 of the shell, so as to form a horn-like gap structure.

When the elastic sealing element 300 abuts against the first bending part 402, the elastic sealing element 300 is extruded to form a second matching recess 303 matched with the first bending part 402, and a second matching protrusion 304 extending into a gap 480 between the first bending part 402 and the third pipe section 405. So set up, this embodiment can rivet the extrusion in second cooperation concave 303 and second cooperation protruding 304 department, and second cooperation concave 303 and second cooperation protruding 304 can be used as key sealing point, and wherein, in this embodiment, gap 480 between first kink 402 and the third pipeline section 405 is horn-shaped structure, can do benefit to the formation of second cooperation protruding 304 for produce the sealed effect of reinforcing gradually.

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

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

Referring to fig. 6a, a cross-sectional view of a housing seal arrangement 13 according to an embodiment of the application is shown. Referring to fig. 6b, an enlarged view of a portion D of fig. 6a is shown according to an embodiment of the present application. Referring to fig. 6c, an exploded view of the housing seal arrangement 13 according to an embodiment of the application is shown. The cover plate 200 is provided with a bending protrusion 230 on a surface facing away from the bottom plate 410, and the bending protrusion 230 may be an integrally formed additive convex structure or a non-additive convex structure formed by bending. In this embodiment, the cover 200 is a bent plate, the edge portion 210 of the cover is in a straight plate shape, the middle portion 220 of the cover is in a straight plate shape, and the edge portion 210 of the cover and the middle portion of the cover 200 are inclined relatively to form a bending protrusion 230.

The connecting ring 407 is provided with a bending groove 440 adapted to the bending protrusion 230, and the curvature of the bending groove 440 is greater than that of the bending protrusion 230.

When the extending elastic ring piece 340 is clamped between the connecting ring piece 407 and the cover plate 200, the extending elastic ring piece 340 is extruded to form a first fitting recess 301 adapted to the bending protrusion 230 and a first fitting protrusion 302 extending into the bending groove 440. So configured, the present embodiment can produce locally greater 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 serve as critical rivet points.

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

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

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A housing seal arrangement comprising:

A cover plate;

An elastic sealing member wrapped around the edge of the cover plate, and

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

the frame comprises a first pipe section, a first bending part, a second pipe section, a second bending part and a third pipe section, wherein one end of the first pipe section is connected with the shell bottom plate, 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, the other end of the second pipe section extends outwards, one 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, the other end of the second pipe section extends outwards, one end of the third pipe section is connected with the second bending part, 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 larger than the length 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;

The size of the gap between the first bending part and the third pipe section increases gradually along the direction away from the shell bottom plate, wherein when the elastic sealing piece is propped against the first bending part, the elastic sealing piece is extruded to form a second matching concave matched with the first bending part and a second matching convex extending into the gap;

Wherein the cover plate is connected to the fixing groove through the elastic sealing element;

the frame is provided with at least one pressure relief through hole at the fixing groove, and the pressure relief through holes are circumferentially arranged on the third pipe section.

2. The housing seal arrangement of claim 1 wherein the 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.

3. The housing seal arrangement of claim 2 wherein the rim further comprises:

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

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

4. The shell sealing structure according to claim 3, wherein the cover plate is provided with a bending protrusion on one surface facing away from the shell bottom plate, and the connecting ring piece is provided with a bending groove matched with the bending protrusion;

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

5. The sealing structure of the shell according to claim 3, wherein the surface of the third bending part is a circular arc-shaped curved surface, and the edge part of the cover plate is provided with a first round angle matched with the third bending part;

When the elastic sealing piece is propped against the third bending part, the elastic sealing piece is extruded to form a third matching concave matched with the first round angle and a third matching convex extending into the third bending part.

6. The housing seal arrangement of claim 1 wherein the edge portion 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 toward the housing floor at the other end;

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.

7. A battery, comprising:

a housing seal arrangement as claimed in any one of claims 1 to 6, and

And the electrode is arranged in the shell sealing structure.