Cover plate provided with anti-explosion valve and battery

Abstract

The utility model relates to a cover plate provided with an anti-explosion valve. The cover plate comprises a sealing ring, a pressing plate, an insulating part, the anti-explosion valve and a supporting piece. The outer edge of the insulating part is provided with a first annular structure, and the first annular structure wraps the outer edge of the supporting piece. The supporting piece is provided with a second annular structure, the anti-explosion valve is arranged in the second annular structure, the outer edge of the supporting piece protrudes out of the second annular structure, and a gap is formed between the second annular structure and the first annular structure; the sealing ring covers the anti-explosion valve, the second annular structure and a part of the outer edge of the supporting piece, the sealing ring is provided with a third annular structure, and the third annular structure is arranged in the gap. According to the explosion-proof valve, the cover plate is not directly welded with the explosion-proof valve, the supporting piece welded with the explosion-proof valve is introduced, the supporting piece and the sealing ring form a double-sealing structure, and the insulating part prevents the supporting piece welded with the explosion-proof valve from being directly contacted with the cover plate, so that the corrosion risk caused by negative electricity of the explosion-proof valve is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially, relate to a cover plate set with explosion -proof valve and a battery. BACKGROUND

[0002] In the battery technology field, with the improvement of battery energy density, battery safety problem is paid more and more attention. Cover plate as part of the battery assembly, its design not only ensures the normal work of battery, but also provides necessary safety protection when the internal pressure of battery abnormally rises. Explosion -proof valve as a kind of key safety device, can automatically release pressure when the internal pressure of battery exceeds safety threshold, prevent battery from exploding or fire, thereby protecting user safety.

[0003] However, the explosion -proof valve in prior art usually adopts the mode of direct welding and is connected with cover plate. This connection mode requires that the material quality of cover plate must be completely consistent with the material quality of explosion -proof valve, to ensure the firmness and sealing property of welding. But in actual application, the material quality of cover plate is various, such as steel, aluminum, plastic, etc. The inconsistency on these materials leads to that explosion -proof valve cannot be directly welded and connected, increases the design and manufacturing cost of cover plate, and also affects the overall safety of battery.

[0004] Therefore, there is an urgent need for a cover plate provided with explosion -proof valve. UTILITY MODEL CONTENT

[0005] The utility model aims at the deficiency in prior art, provides a cover plate set with explosion -proof valve and a battery.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0007] The first aspect of the utility model is to provide a cover plate provided with explosion -proof valve, comprising: sealing ring, pressing plate, insulating piece, explosion -proof valve and supporting piece, wherein,

[0008] The pressing plate, the insulating piece, the supporting piece, the explosion -proof valve and the sealing ring are sequentially arranged;

[0009] The outer edge of the insulating piece has a first annular structure, and the first annular structure covers the outer edge of the supporting piece;

[0010] The supporting piece has a second annular structure, the explosion -proof valve is arranged in the second annular structure, the outer edge of the supporting piece protrudes from the second annular structure, and the second annular structure and the first annular structure have a gap therebetween;

[0011] The sealing ring covers the explosion -proof valve, the second annular structure and part of the outer edge of the supporting piece, the sealing ring has a third annular structure, and the third annular structure is arranged in the gap.

[0012] Preferably, further comprising: a cover plate body; wherein,

[0013] The cover plate body is provided with a stepped hole penetrating therethrough, and the sealing ring, a portion of the pressing plate, the insulating piece, a portion of the explosion-proof valve, and the supporting piece are arranged in the stepped hole.

[0014] Preferably, the stepped hole comprises: a first side wall extending in an axial direction of the stepped hole, a second side wall extending in a radial direction of the stepped hole, and a third side wall extending in the axial direction of the stepped hole; wherein,

[0015] The first side wall, the second side wall, and the third side wall are sequentially connected.

[0016] The first side wall is nested with the first annular structure, the second side wall abuts against the first annular structure and the third annular structure, and the third side wall is nested with the third annular structure.

[0017] Preferably, an outer edge of the pressing plate abuts against a surface of the cover plate body.

[0018] Preferably, the sealing ring, the pressing plate, the insulating piece, the explosion-proof valve, and the supporting piece are all hollow waist-shaped.

[0019] The second aspect of the utility model provides a battery, comprising: the cover plate as described above.

[0020] The utility model adopts above technical scheme, compared with prior art, has following technical effect:

[0021] The cover plate of the utility model is not directly welded with the explosion-proof valve, but a supporting piece welded with the explosion-proof valve is introduced, the supporting piece and the sealing ring form a double-sealing structure, the insulating piece avoids the direct contact between the supporting piece welded with the explosion-proof valve and the cover plate, thereby reducing the corrosion risk of the explosion-proof valve due to the negative electricity, and finally, the pressing plate is directly welded with the cover plate, which can realize the effective connection between the explosion-proof valve and various material substrates. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is an explosion structure schematic view of the cover plate in the utility model;

[0023] Among them, the reference signs include:

[0024] Cover plate body 1; sealing ring 2; pressing plate 3; insulating piece 4; explosion-proof valve 5; supporting piece 6. DETAILED DESCRIPTION

[0025] The specific implementation manner of the utility model will be described in detail below.

[0026] Unless otherwise defined, technical and scientific terms used in the claims and specification have their ordinary meaning as understood by one of ordinary skill in the art to which the present application pertains.

[0027] As used in the specification and in the claims, the phrase "comprising" and variations thereof, such as "comprise" and "comprises," mean that the object or method described is open-ended and includes not only the recited elements but also equivalents thereof.

[0028] Numerical ranges recited herein are inclusive of the numbers within the range. Unless otherwise indicated, numerical ranges are inclusive of the recited endpoints and all sub-ranges falling there between. As used herein, "about" means approximately or nearly, for example, "about 5" means approximately 5. As used herein, "substantially" means largely or for the most part, for example, "substantially oriented" means largely oriented. As used herein, "comprising" means including, but not limited to, e.g., "comprising" means including the recited elements, but not excluding others.

[0029] Example 1

[0030] As shown in the drawings, the present embodiment provides a cover plate provided with an explosion-proof valve, comprising: a cover plate body 1, a sealing ring 2, a pressing plate 3, an insulating piece 4, an explosion-proof valve 5, and a supporting piece 6; wherein, Figure 1 The cover plate body 1 is provided with a stepped hole, the pressing plate 3, the insulating piece 4, the supporting piece 6, the explosion-proof valve 5, and the sealing ring 2 are sequentially arranged, and the sealing ring 2, a part of the pressing plate 3, the insulating piece 4, a part of the explosion-proof valve 5, and the supporting piece 6 are arranged in the stepped hole

[0031] The outer edge of the insulating piece 4 has a first annular structure, and the first annular structure covers the outer edge of the supporting piece 6;

[0032] The supporting piece 6 has a second annular structure, the explosion-proof valve 5 is arranged in the second annular structure, the outer edge of the supporting piece 6 protrudes from the second annular structure, and the second annular structure and the first annular structure have a gap therebetween;

[0033] The sealing ring 2 covers the explosion-proof valve 5, the second annular structure, and a part of the outer edge of the supporting piece 6, the sealing ring 2 has a third annular structure, and the third annular structure is arranged in the gap;

[0034] The sealing ring 2 covers the explosion-proof valve 5, the second annular structure, and a part of the outer edge of the supporting piece 6, the sealing ring 2 has a third annular structure, and the third annular structure is arranged in the gap;

[0035] The outer edge of the pressing plate 3 abuts against the surface of the cover plate body 1.

[0036] The stepped hole comprises a first sidewall extending in the axial direction of the stepped hole, a second sidewall extending in the radial direction of the stepped hole, and a third sidewall extending in the axial direction of the stepped hole.

[0037] The first sidewall, the second sidewall, and the third sidewall are sequentially connected; the first sidewall nests the first annular structure, the second sidewall abuts against the first annular structure and the third annular structure, and the third sidewall nests the third annular structure.

[0038] In a preferred embodiment, the sealing ring 2, the pressing plate 3, the insulating piece 4, the explosion-proof valve 5, and the supporting piece 6 are all hollow waist-shaped.

[0039] In the utility model, the "waist shape" refers to a shape similar to a "track and field running track", which is composed of two half circles or arc of a circle at both ends and two line segments connecting the two aforementioned half circles or arcs.

[0040] In the utility model, the "hollow waist shape" refers to a waist shape with a waist hole in the middle.

[0041] Embodiment 2

[0042] The embodiment provides a battery, comprising: the cover plate as described in embodiment 1.

[0043] In summary, the cover plate of the utility model is not directly welded with the explosion-proof valve, but a supporting piece welded with the explosion-proof valve is introduced, the supporting piece and the sealing ring form a double-sealing structure, and the insulating piece avoids the direct contact of the supporting piece welded with the explosion-proof valve and the cover plate, thereby reducing the corrosion risk of the explosion-proof valve due to negative electricity, and finally, the pressing plate is directly welded with the cover plate, so that the effective connection of the explosion-proof valve and various material substrates can be realized.

[0044] The above description is only the preferred embodiment of the utility model, and does not limit the implementation and protection range of the utility model, and for those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the contents of the utility model specification and drawings should be included in the protection range of the utility model.

Claims

1. A cover plate provided with an explosion-proof valve, characterized in that The sealing ring (2), the pressing plate (3), the insulating piece (4), the explosion-proof valve (5), and the supporting sheet (6); wherein, The pressing plate (3), the insulating piece (4), the supporting sheet (6), the explosion-proof valve (5), and the sealing ring (2) are sequentially arranged; The outer edge of the insulating piece (4) has a first annular structure, which covers the outer edge of the supporting sheet (6); The supporting sheet (6) has a second annular structure, the explosion-proof valve (5) is arranged in the second annular structure, the outer edge of the supporting sheet (6) protrudes from the second annular structure, and the second annular structure and the first annular structure have a gap therebetween; The sealing ring (2) covers the explosion-proof valve (5), the second annular structure, and part of the outer edge of the supporting sheet (6), and the sealing ring (2) has a third annular structure arranged in the gap. Further comprising:

2. The cover sheet of claim 1, wherein The cover plate body (1); wherein, The cover plate body (1) has a stepped hole passing therethrough, and the sealing ring (2), part of the pressing plate (3), the insulating piece (4), part of the explosion-proof valve (5), and the supporting sheet (6) are arranged in the stepped hole. The stepped hole comprises a first side wall extending in the axial direction of the stepped hole, a second side wall extending in the radial direction of the stepped hole, and a third side wall extending in the axial direction of the stepped hole; wherein, 3. The cover sheet of claim 2, wherein, The first side wall, the second side wall, and the third side wall are sequentially connected; The first side wall nests the first annular structure, the second side wall abuts against the first annular structure and the third annular structure, and the third side wall nests the third annular structure. The outer edge of the pressing plate (3) abuts against the surface of the cover plate body (1).

4. The cover sheet of claim 2, wherein The sealing ring (2), the pressing plate (3), the insulating piece (4), the explosion-proof valve (5), and the supporting sheet (6) are all hollow waist-shaped.

5. The cover sheet of claim 1, wherein Comprise:

6. A battery, characterized by The cover plate according to any one of claims 1-5. ​

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