CN210628405U

CN210628405U - Sealing plug for liquid injection port of cover plate

Info

Publication number: CN210628405U
Application number: CN201921673084.XU
Authority: CN
Inventors: 解林
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-05-26
Anticipated expiration: 2029-09-30

Abstract

The utility model discloses a liquid mouth sealing plug is annotated to apron, including strengthening core and elasticity overcoat, wherein: the elastic outer sleeve is coated outside the reinforced core; the reinforced core is provided with a sealing column and a self-locking part, the self-locking part is positioned below the sealing column, the self-locking part is provided with an inner side surface and a locking surface, the distance from the bottom to the top of the inner side surface to the axis of the sealing column is gradually increased, the sealing column is matched with the liquid injection hole, and the locking surface is abutted against the bottom of the cover plate. The utility model provides a seal stopper, from the locking part medial surface and locking surface have, the medial surface increases gradually from the bottom up apart from the distance of sealed post axis, self-locking portion forms the barb with sealed post, the outside cladding rubber of locking surface is contradicted bottom the apron, because produce gas when the battery is inside, make the inside atmospheric pressure of battery too big, can produce ascending thrust to sealing the stopper, barb department rubber buffer can laminate with the apron bottom more, the locking surface is big more with the power of apron conflict promptly, avoid sealed post to break away from annotate the liquid hole, and then guarantee to annotate the liquid mouth leakproofness good.

Description

Sealing plug for liquid injection port of cover plate

Technical Field

The utility model relates to a lithium cell annotates liquid mouth wind gap equipment technical field, especially relates to a apron is annotated liquid mouth and is sealed stopper.

Background

The lithium ion battery with the advantages of no memory effect, small self-discharge, high energy density, long service life and the like is widely applied to the fields of electric automobiles, hybrid electric automobiles, portable mobile power supplies and the like.

The lithium ion battery system applied to the electric vehicle or the hybrid electric vehicle is formed by combining dozens of to thousands of single battery cells in series and parallel, which puts higher requirements on the consistency of the single battery cells in the system, namely the consistency of the capacity, voltage, internal resistance, appearance size and the like of the single battery cells in the system is good. However, excessive moisture in the battery reacts with the electrolyte to generate hydrofluoric acid, which is a very corrosive acid and can corrode and damage the positive and negative electrode materials and the current collectors of the lithium battery, and meanwhile, the excessive moisture can react with the electrolyte to generate a large amount of gas (CO2, H2, CO) to cause battery swelling, and the excessive moisture can also catalyze the LiPF6 to decompose to generate more LiF and HF, and the excessive LiF can accumulate on the surface of the SEI film to cause the increase of the internal resistance of the battery, which can affect the performance and the service life of the battery, and even cause serious safety accidents. After the internal air pressure of the battery reaches a certain value, a gap can be formed at the weak position of the battery, so that the leakage of the battery is caused, the environment is polluted, the performance of the battery is influenced, and potential safety hazards are generated. Since the battery filling opening needs a sealing plug for sealing, the battery filling opening is relatively easy to leak compared with other portions, and therefore, the sealing performance of the battery filling opening is required to be good.

SUMMERY OF THE UTILITY MODEL

For the technical problem who exists among the solution background art, the utility model provides a stopper is sealed to apron notes liquid mouth.

The utility model provides a liquid mouth sealing plug is annotated to apron, including strengthening core and elasticity overcoat, wherein:

the reinforcing core is provided with a sealing column and a self-locking part, the self-locking part is positioned below the sealing column, the self-locking part is provided with an inner side surface and a locking surface, the distance from the inner side surface to the axis of the sealing column is gradually increased from bottom to top, the sealing column is matched with the liquid injection hole, and the locking surface is abutted against the bottom of the cover plate;

the elastic outer sleeve is coated outside the reinforced core.

In some embodiments, the elastic casing is made of rubber material.

In particular in some embodiments, the reinforcing core is made of steel.

In this embodiment, it is preferable that an end of the elastic sleeve away from the self-locking portion is provided with a support ring extending outward in a circumferential direction thereof.

In this embodiment, it is preferable that the thickness of the self-locking portion gradually becomes thicker from the end away from the seal post to the end close to the seal post.

In this embodiment, it is preferable that the diameter of the lower half portion of the sealing post corresponding to the self-locking portion gradually increases from bottom to top.

In this embodiment, the self-locking portion is preferably tapered.

In this embodiment, the self-locking portion is preferably provided with a plurality of openings along a radial direction thereof, and the plurality of openings form the self-locking portion into a plurality of arc-shaped self-locking pieces.

In some embodiments, the reinforcing core is integrally formed.

In the cover plate liquid injection port sealing plug, the elastic outer sleeve coated outside the sealing column has elasticity, and the inner wall of the liquid injection hole is sealed to achieve the sealing effect; self-locking portion has medial surface and locking surface, the medial surface is crescent from the bottom up apart from the distance of sealed post axis, self-locking portion forms the barb with sealed post, the outside cladding rubber of locking surface is contradicted bottom the apron, because produce gas when the battery is inside, make the inside atmospheric pressure of battery too big, can produce ascending thrust to sealing the stopper, barb department rubber buffer can laminate with the apron bottom more, the power that locking surface and apron are contradicted is big more promptly, it breaks away from the notes liquid hole to avoid sealed post, and then guarantee to annotate liquid mouth leakproofness good.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the reinforcement core of the present invention;

FIG. 3 is a schematic view of the structure of the cover plate in the sealing state;

fig. 4 is a partial enlarged view of the area a of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The sealing plug for the liquid filling opening of the cover plate comprises a reinforced core 1 and an elastic outer sleeve 2, wherein:

the reinforced core 1 is made of steel materials through integral forming, the reinforced core 1 is provided with a sealing column 10 and a self-locking part 11, the self-locking part 11 is positioned below the sealing column 10, the self-locking part 11 is provided with an inner side surface 111 and a locking surface 110, the distance from the inner side surface 111 to the axis of the sealing column 10 is gradually increased from bottom to top, the sealing column 10 is matched with the liquid injection hole 3, and the locking surface 110 is abutted against the bottom of the cover plate 4; the thickness of the self-locking part 11 gradually becomes thicker from one end far away from the sealing column 10 to one end close to the sealing column 10, the diameter of the lower half part of the sealing column 10 corresponding to the self-locking part 11 gradually becomes larger from bottom to top, the self-locking part 11 is conical, a plurality of openings 112 are formed in the self-locking part 11 along the radial direction of the self-locking part, and the openings 112 divide the self-locking part 11 into a plurality of arc-shaped self-locking plates 113;

the elastic outer sleeve 2 is wrapped outside the reinforcing core 1, the elastic outer sleeve 2 is made of rubber materials, and one end, far away from the self-locking portion 11, of the elastic outer sleeve 2 extends outwards along the circumferential direction of the elastic outer sleeve and is provided with a support ring 5.

In order to increase the sealing effect, the liquid injection hole 3 is a T-shaped hole, the gasket 6 can be placed at the upper end of the liquid injection hole 3, the cover plate 4 and the gasket 6 are welded into a whole in a laser welding mode, the air vent plug in the liquid injection hole is protected from being damaged, and the secondary sealing effect is achieved.

In the working process of the embodiment, when the sealing plug is installed, the sealing plug is pressed from bottom to top into the liquid injection hole 3, the self-locking part 11 is extruded, one end far away from the sealing column 10 is deformed in the direction close to the sealing column 10 and is in a shrinking state, when the sealing column 10 is completely extruded to the liquid injection hole 3, the support ring 5 is contacted with the top of the cover plate 4, the self-locking piece 113 of the self-locking part 11 is recovered to an opening state under the action of self elastic force, the elastic outer sleeve 2 outside the locking surface 110 is abutted to the bottom of the cover plate 4, gas is generated inside the battery, the internal gas pressure of the battery is too high, upward thrust can be generated on the sealing plug, but as the self-locking part 11 is arranged in the sealing plug, the larger the gas pressure is, the rubber at the locking surface 110 of the self-locking part 11 is attached to the bottom of.

In the present embodiment, the elastic sheath 2 is preferably made of rubber material, and the elasticity is high, so that the sealing plug can be conveniently installed.

In the present embodiment, the reinforcing core 1 is preferably made of steel, and the strength of the sealing plug is improved so as to be less likely to be deformed or damaged.

In the present embodiment, it is preferable that the end of the elastic sleeve 2 away from the self-locking portion 11 is provided with a support ring 5 extending outward in the circumferential direction thereof to prevent the closure plug from leaking into the pouring hole 3 when inserted into the pouring outlet.

In this embodiment, it is preferable that the thickness of the self-locking portion 11 gradually increases from the end far from the sealing post 10 to the end near the sealing post 10, so that the sealing plug is easily attached, and when the sealing plug moves downward into the pouring hole 3, the self-locking portion 11 is easily tightened, that is, the self-locking portion 11 is easily deformed toward the sealing post 10.

In the present embodiment, the diameter of the lower half of the sealing post 10 corresponding to the self-locking portion 11 is preferably gradually increased from bottom to top, so as to facilitate installation of the sealing plug.

In this embodiment, the self-locking portion 11 is preferably tapered to increase the contact area between the locking surface 110 and the cover plate 4, thereby increasing the self-locking effect and preventing the vent plug from being separated from the liquid injection hole 3 after gas is generated in the battery.

In the present embodiment, it is preferable that the self-locking portion 11 has a plurality of openings 112 along a radial direction thereof, and the openings 112 divide the self-locking portion 11 into a plurality of arc-shaped self-locking pieces 113, so that the contact area between the locking surface 110 and the cover plate 4 is increased, and the installation is facilitated.

In the present embodiment, the core 1 is preferably formed integrally, which is convenient for manufacturing.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a stopper is sealed to liquid mouth is annotated to apron, its characterized in that, including strengthening core (1) and elasticity overcoat (2), wherein:

the reinforced core (1) is provided with a sealing column (10) and a self-locking part (11), the self-locking part (11) is positioned below the sealing column (10), the self-locking part (11) is provided with an inner side surface (111) and a locking surface (110), the distance from the inner side surface (111) to the axis of the sealing column (10) is gradually increased from bottom to top, the sealing column (10) is matched with the liquid injection hole (3), and the locking surface (110) is abutted against the bottom of the cover plate (4);

the elastic jacket (2) is coated outside the reinforced core (1).

2. The sealing plug for the liquid filling opening of the cover plate as claimed in claim 1, wherein the elastic outer sleeve (2) is made of rubber.

3. The sealing plug for the liquid filling opening of the cover plate according to claim 1, wherein the reinforcing core (1) is made of steel.

4. The sealing plug for the pouring spout of a lid plate according to claim 1, wherein a support ring (5) is provided at an end of the elastic sheath (2) remote from the self-locking portion (11) and extending outward in a circumferential direction thereof.

5. The sealing plug for the pouring spout of a lid plate according to claim 1, wherein the thickness of the self-locking portion (11) becomes gradually thicker from the end distant from the stem (10) toward the end near the stem (10).

6. The sealing plug for the liquid filling opening of the cover plate according to claim 5, wherein the diameter of the lower half part of the sealing column (10) corresponding to the self-locking part (11) is gradually increased from bottom to top.

7. The sealing plug for the liquid filling opening of the cover plate as claimed in claim 1, wherein the self-locking portion (11) is tapered.

8. The lid-sealing stopper for a pouring spout of a lid plate according to claim 7, wherein the self-locking portion (11) has a plurality of openings (112) formed along a radial direction thereof, and the plurality of openings (112) divide the self-locking portion (11) into a plurality of arc-shaped self-locking pieces (113).

9. The sealing plug for the liquid filling opening of the cover plate according to claim 1, wherein the reinforcing core (1) is integrally formed.