CN210516860U - Secondary battery sealing rubber plug structure and battery cover plate - Google Patents

Abstract

The utility model discloses a secondary battery seals plug structure and battery apron, sealed plug structure includes the notes liquid hole that sets up on the apron, and this notes liquid hole includes notes liquid hole upper flange, notes liquid hole terminal surface and notes liquid hole lower flange, plug structure includes chock plug and cock body, chock plug and cock body are the T type setting and make the edge of chock plug surpass the edge of cock body forms the flange on the chock plug, the one end that the cock body kept away from the chock plug is equipped with a plurality of breachs, and the breach is cambered surface or straight face; the gap between the flange on the rubber plug and the flange on the liquid injection hole is coaxially arranged, and the plug body is in interference fit with the lower flange of the liquid injection hole; the utility model discloses this setting can set the plug structure to the echelonment, with annotate the liquid hole cooperation, prevents that sealed plug from impressing and annotating the liquid hole too deeply or leading to falling into the inside risk of electric core in the use to improve the emergence of making the major rate, reducing the weeping problem, do benefit to the life and the security that promote the battery.

Description

Secondary battery sealing rubber plug structure and battery cover plate

Technical Field

The utility model relates to a battery accessory field, especially a sealed plug structure of secondary battery and battery apron.

Background

Under the double-wheel drive of national policies and markets, industries such as electric automobiles, energy storage industries, electric tools and the like are rapidly developed, so that the demand on lithium ion batteries is more and more vigorous. The energy storage and storage battery has the advantages of small volume, high energy density, high safety, small self-discharge, long service life, large-current charge and discharge, environmental friendliness and the like, and is widely applied to multiple fields of energy storage, communication, mobile phones, notebook computers, digital cameras, electric automobiles, aerospace, military equipment and the like. The safety and the service life of the battery are important concerns, wherein the leakage problem of the battery is one of the important concerns, so how to reduce the leakage problem in the structural design is an important subject, wherein, the structure of the rubber plug of the liquid injection hole needs to be improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the existing problems, the utility model discloses a secondary battery seals plug structure, including the notes liquid hole that sets up on the apron, this notes liquid hole includes notes liquid hole upper flange, notes liquid hole terminal surface and notes liquid hole lower flange, plug structure includes chock plug and cock body, chock plug and cock body are the T type setting and make the edge of chock plug surpass the edge of cock body forms the plug flange and the plug terminal surface, the one end that the cock body kept away from the chock plug is equipped with a plurality of breachs, and the breach is cambered surface or straight surface; the plug body is in interference fit with the lower flange of the liquid injection hole.

Furthermore, the upper surface of the plug head is at least provided with a first groove and a second groove, and compression springs are fixed in the first groove and the second groove.

Furthermore, the upper surface of the chock plug is provided with a plurality of arc-shaped explosion-proof grooves.

Furthermore, the arc-shaped anti-explosion grooves are all located on the same circumference concentrically arranged with the plug head.

Furthermore, a compression spring is fixed in each arc-shaped explosion-proof groove.

Furthermore, one end of the compression spring, which is far away from the plug body, is connected with a sealing aluminum nail.

Furthermore, the plug body exceeds the lower edge of the liquid injection hole by 5-10 mm.

Furthermore, the distance between the flange on the rubber plug and the flange on the liquid injection hole is 3-5 mm.

Furthermore, the plug head and the plug body are both made of high polymer materials resistant to electrolyte corrosion.

The invention also discloses a battery cover plate which comprises the sealing rubber plug structure.

The utility model has the advantages that: (1) the plug head and the plug body are arranged in a T shape, so that the edge of the plug head exceeds the edge of the plug body to form a plug flange, one end of the plug body, which is far away from the plug head, is provided with a plurality of notches, and the notches are arc surfaces or straight surfaces; (2) set up compression spring at the chock plug upper surface, because compression spring's characteristic has the effect of buffering release on the one hand, it is big to reduce sealed aluminium nail and top cap laser welding local pressure, or the laser welding penetration crosses the weeping risk that factor such as low produced, and on the other hand when the installation for the sealing performance of plug structure is good.

Drawings

FIG. 1 is a schematic perspective view of the structure of example 1;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a first schematic structural view of embodiment 2;

FIG. 4 is a second schematic structural view of example 2;

FIG. 5 is a schematic structural view of example 3;

in the figure, 10-battery cover plate, 11-liquid injection hole, 111-liquid injection hole upper flange, 112-liquid injection hole end face, 113-liquid injection hole lower flange, 20-plug head, 21-rubber plug upper flange, 22-rubber plug end face, 23-rubber plug lower flange, 30-sealing aluminum nail, 40-plug body, 50-compression spring and 60-arc-shaped explosion-proof groove.

Detailed Description

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

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 2, a secondary battery sealing rubber plug structure comprises a liquid injection hole 11 arranged on a cover plate, wherein the liquid injection hole 11 comprises an upper liquid injection hole flange 111, an end face 112 of the liquid injection hole and a lower liquid injection hole flange 113, the rubber plug structure comprises a plug head 20 and a plug body 40, the plug head 20 and the plug body 40 are arranged in a T shape, so that the edge of the plug head 20 exceeds the edge of the plug body 40 to form a plug flange 21 and a plug end face 22, one end of the plug body 40, which is far away from the plug head 20, is provided with a plurality of notches 41, the notches 41 are arc surfaces or straight surfaces, and the upper end of the plug body 40 is provided with a lower rubber plug flange 23; the upper flange 21 of the rubber plug and the upper flange 111 of the liquid injection hole are coaxially arranged in a clearance mode, the interval between the upper flange 21 of the rubber plug and the upper flange 111 of the liquid injection hole is 4mm, and the lower flange 23 of the rubber plug on the plug body 40 is in interference fit with the lower flange 113 of the liquid injection hole.

Example 2

The present embodiment is further optimized based on embodiment 1, as shown in fig. 3-4, specifically, the upper surface of the plug 20 is at least provided with a first groove and a second groove, and a compression spring 50 is fixed in the first groove and the second groove.

In still other embodiments, as shown in FIG. 3, the upper surface of the plug head 20 is provided with a plurality of arcuate vent grooves 60.

Specifically, the arc-shaped explosion-proof grooves 60 are all located on the same circumference concentrically arranged with the plug head 20.

Specifically, a compression spring 50 may be fixed in each arc-shaped explosion-proof groove 60.

Compression spring 50 keeps away from the one end of cock body 40 is connected with sealed aluminium nail 30, and this setting can be when will sealed aluminium nail 30 welding, because compression spring's extrusion, can be with sealed plug structure with annotate the liquid hole cooperation compacter, sealing performance is more excellent.

The plug body 40 exceeds the lower edge of the liquid injection hole 11 by 10 mm.

The plug 20 and the plug body 40 are both made of electrolyte corrosion resistant polymer materials.

During assembly, after the battery liquid injection process is completed, the sealing rubber plug structure is pressed into the liquid injection hole 11 from outside to inside, the plug body 23 is in coaxial interference fit with the lower flange 113 of the liquid injection hole until the plug body 23 is matched with the end face of the liquid injection hole 11, the gap between the upper flange 21 of the rubber plug and the upper flange 111 of the liquid injection hole is coaxial, and finally the sealing aluminum nail 30 is assembled and welded with the cover plate 10 in a laser mode.

Example 3

A secondary battery cover plate, as shown in fig. 5, the battery cover plate is provided with the sealing rubber plug structure of embodiment 1 or 2.

The above embodiments only describe the best mode of use of the existing equipment, and similar common mechanical means are used to replace the elements in the present embodiments, which fall into the protection scope.

Claims (10)

1. The utility model provides a sealed plug structure of secondary battery, includes notes liquid hole (11) that set up on the apron, should annotate liquid hole (11) including annotating liquid hole upper flange (111), annotate liquid hole terminal surface (112) and annotate flange (113) under the liquid hole, its characterized in that: the rubber plug structure comprises a plug head (20) and a plug body (40), the plug head (20) and the plug body (40) are arranged in a T shape, so that the edge of the plug head (20) exceeds the edge of the plug body (40) to form a plug upper flange (21) and a rubber plug end face (22), one end, far away from the plug head (20), of the plug body (40) is provided with a plurality of notches (41), and the notches (41) are arc surfaces or straight surfaces; the plug body (40) is in interference fit with the injection hole lower flange (113).

2. The secondary battery sealing rubber plug structure according to claim 1, wherein: the upper surface of the plug head (20) is at least provided with a first groove and a second groove, and compression springs (50) are fixed in the first groove and the second groove.

3. The secondary battery sealing rubber plug structure according to claim 1, wherein: the upper surface of the plug head (20) is provided with a plurality of arc-shaped explosion-proof ditches (60).

4. The secondary battery sealing rubber plug structure according to claim 3, wherein: the arc-shaped anti-explosion grooves (60) are all positioned on the same circumference concentrically arranged with the plug head (20).

5. The secondary battery sealing rubber plug structure according to claim 4, wherein: a compression spring (50) is fixed in each arc-shaped explosion-proof groove (60).

6. The secondary battery sealing rubber plug structure according to claim 2 or 5, wherein: one end of the compression spring (50) far away from the plug body (40) is connected with a sealing aluminum nail (30).

7. The secondary battery sealing rubber plug structure according to claim 1, wherein: the plug body (40) exceeds the lower edge of the liquid injection hole (11) by 5-10 mm.

8. The secondary battery sealing rubber plug structure according to claim 6, wherein: the distance between the flange (21) on the rubber plug and the flange (111) on the liquid injection hole is 3-5 mm.

9. The secondary battery sealing rubber plug structure according to claim 8, wherein: the plug head (20) and the plug body (40) are both made of electrolyte corrosion resistant high polymer materials.

10. A battery cover plate, characterized in that: comprising a sealing plug structure according to any of claims 1-9.

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