CN217361751U

CN217361751U - Plastic structure under secondary battery

Info

Publication number: CN217361751U
Application number: CN202220235235.9U
Authority: CN
Inventors: 张方超; 吴清泉; 赵艺惠
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-01-28
Filing date: 2022-01-28
Publication date: 2022-09-02
Anticipated expiration: 2032-01-28

Abstract

The utility model relates to a plastic structure under secondary cell, this structure is including the top cap piece of seting up the utmost point post hole, set up utmost point post, support ring in the utmost point post hole and hug closely in proper order and set up last plastic, sealing washer and lower plastic in top cap piece, utmost point post and support ring formation space, lower plastic be equipped with and be used for removing down the sealed air channel of plastic, compare with prior art, the utility model has the advantages of can detect out the top cap unusually through having helium to examine the test when neglecting to adorn the sealing washer, need not increase the test and process the degree of difficulty and little.

Description

Plastic structure under secondary battery

Technical Field

The utility model belongs to the technical field of secondary battery and specifically relates to a plastic structure under secondary battery is related to.

Background

A secondary battery (Rechargeable battery), also called a Rechargeable battery or a secondary battery, is a battery that can be continuously used by activating an active material by charging after the battery is discharged. By utilizing the reversibility of chemical reactions, a new battery can be constructed, namely after one chemical reaction is converted into electric energy, the electric energy can be used for repairing a chemical system, and then the chemical reaction is converted into the electric energy, so that the new battery is called as a secondary battery (rechargeable battery).

As shown in 4, in the prior art, the top cap leans on the sealing washer to seal, part the battery inside with the external world, prevent that the interior object of battery from spilling over, for preventing gas leakage, the top cap has a helium and examines the process, the top cap piece and the utmost point post extrusion deformation on sealing washer both sides when the top cap passes through the riveting, form sealed area, the lower plastic of compressed probably forms sealed vice with top cap piece and utmost point post, except that forming sealed in sealed area of sealing washer, also can form sealed in sealed area of plastic down after lower plastic is compressed, but when neglected to adorn the sealing washer, because lower plastic has formed sealedly, can cause the problem that can not detect gas leakage, make the sealed requirement that can not satisfy battery of lower plastic.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a plastic structure under secondary battery in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a plastic structure under secondary cell, this structure is including the top cap piece of seting up the utmost point post hole, set up utmost point post, support ring in utmost point post hole and hug closely in proper order and set up last plastic, sealing washer and lower plastic in top cap piece, utmost point post and support ring formation space, lower plastic be equipped with and be used for relieving the sealed air channel of plastic down.

The sealing ring is composed of an outer side sealing part and an inner side embedding part.

The lower plastic consists of an outer supporting part and an inner compressed part.

The outer side sealing part of the sealing ring is matched and tightly attached to the inner side of the lower plastic by the compression part.

The pole column comprises a lower base, a connecting part arranged in the middle of the lower base and a boss arranged on the upper surface of the connecting part, and an outward bulge is arranged on the lower part of the boss.

The inner compressed part of the lower plastic is provided with a vent groove for releasing the sealing of the contact position of the pole and the inner compressed part in the contact area of the pole surface, and the length of the vent groove is more than or equal to the length of the superposition of the inner compressed part and the pole surface.

The inner compressed part of the lower plastic is provided with a ventilation groove in the contact area with the top cover sheet for releasing the sealing of the contact position of the top cover sheet and the inner compressed part.

Go up the plastic include plastic ring on outside-in integrated into one piece's the first plastic ring of going up, the second and the plastic ring is gone up to the third, first go up plastic ring, the second go up the upside of plastic ring and third and flush, and its thickness increases in proper order.

The third of going up the plastic go up plastic ring lower surface inboard and be equipped with a plastic ring channel, the upper surface of sealing washer be equipped with an annular arch in the ring channel of last plastic corresponding position department, annular arch and last plastic ring channel cooperation paste tightly.

The outside sealing part of sealing washer and the inboard of lower plastic be the annular inclined plane that the tight face upside that pastes of compressing portion cooperation is outside-in slope, paste tight face downside and be the annular vertical face.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model realizes that the top cover abnormity can be detected through the existing helium detection test when the sealing ring is neglected to be installed by arranging the vent groove on the lower plastic, and the technical effect of the test is not needed to be increased;

2. the utility model discloses the air channel that increases simple structure, the processing degree of difficulty is little, easily shaping.

Drawings

Fig. 1 is a partial cross-sectional view of a vent channel formed in a lower plastic layer according to an embodiment of the present invention.

Fig. 2 is a partial cross-sectional view of another vent channel formed in the lower plastic layer according to an embodiment of the present invention.

Fig. 3 is a partial cross-sectional view of a vent channel according to an embodiment of the present invention.

FIG. 4 is a partial cross-sectional view of a conventional lower plastic.

Wherein: 1. the terminal column comprises a terminal column body, 2 parts of a support ring, 3 parts of an upper plastic cement, 4 parts of a sealing ring, 5 parts of a top cover plate, 6 parts of a lower plastic cement, 7 parts of an air vent, 8 parts of an effective sealing area of the sealing ring, 9 parts of a lower plastic cement sealing area, 10 parts of a sealing ring sealing area, and 11 parts of riveting positions.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Examples

The utility model provides a secondary cell utmost point post structure, this structure is including the top cap piece 5 of seting up utmost point post hole, set up utmost point post 1, support ring 2 in utmost point post hole and hug closely in proper order and set up last plastic 3, sealing washer 4 and lower plastic 6 in top cap piece 5, utmost point post 1 and support ring 2 formation space, and lower plastic 6 is equipped with and is used for removing lower plastic 6 sealed air channel 7.

The sealing ring 4 is composed of an outer sealing part and an inner embedding part, the lower plastic 6 is composed of an outer supporting part and an inner compressed part, the outer sealing part of the sealing ring 4 and the inner compressed part of the lower plastic 6 are matched and attached tightly, the upper side of the attaching surface, which is matched and attached tightly by the outer sealing part of the sealing ring 4 and the inner compressed part of the lower plastic 6, is an annular inclined surface inclined from outside to inside, and the lower side of the attaching surface is an annular vertical surface.

Utmost point post 1 includes base, connecting portion and the boss down by supreme setting down, and the boss lower part is equipped with outside arch.

Go up plastic 3 and include outside-in integrated into one piece's the first plastic ring of going up, plastic ring and the third go up the plastic ring on the second, the first upside of going up plastic ring, plastic ring and third go up the plastic ring on the second flushes, and its thickness increases in proper order, and go up plastic 3's the third and go up plastic ring lower surface inboard and be equipped with one and go up the plastic ring channel, the upper surface of sealing washer 4 corresponds position department at last plastic 3's ring channel and is equipped with an annular arch, annular arch and last plastic ring channel cooperation paste tightly.

Make sealing washer 4 sealed through plastic 6 and sealing washer 4 under utmost point post 1 and the compression of top cap piece 5, the inboard of plastic 6 is compressed portion and sealing washer 4 by utmost point post 1 and the compression of top cap piece 5 down, and it sets up to not seal structure through the inboard of being compressed portion fluting to plastic 6 down, only remains sealing washer 4 sealed, is equipped with air channel 7 by the compressed portion in plastic 6 inboard under promptly.

As shown in fig. 1 and 2, the present invention provides two ways of forming the vent groove 7:

1. a vent groove 7 which is longer than the length superposed with the surface of the pole 1 is arranged in the contact area of the inner compressed part of the lower plastic 6 and the surface of the pole 1, so that the seal is released at the contact position of the inner compressed part of the lower plastic 6 and the pole 1;

2. a vent groove 7 is formed in the area where the inner compressed part of the lower plastic 6 contacts the top cover 5, so that the seal is released at the position where the top cover 5 contacts the inner compressed part of the lower plastic 6.

And the length of the vent groove 7 is not less than the compressed length of the lower plastic 6, when the vent groove 7 is opened on the lower plastic surface of the lower plastic contacted with the pole, the compressed length is the length of the middle of the lower plastic and the pole, and when the vent groove 7 is opened on the lower plastic surface of the lower plastic contacted with the top cover plate, the compressed length is the length of the lower plastic and the top cover plate.

When the sealing ring 4 is installed, the lower plastic structure does not affect the original function in the normal state, namely the vent groove 7 does not affect the expected sealing performance, and when the sealing ring 4 is not installed, the only sealing cannot be formed, namely air leakage can be detected in the detection.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a plastic structure under secondary cell, its characterized in that, this structure is including top cap piece (5) of seting up the utmost point post hole, set up utmost point post (1), support ring (2) in the utmost point post hole and hug closely in proper order and set up last plastic (3), sealing washer (4) and lower plastic (6) in top cap piece (5), utmost point post (1) and support ring (2) formation space, lower plastic (6) be equipped with and be used for relieving lower plastic (6) sealed air channel (7).

2. The plastic structure under secondary battery according to claim 1, wherein the gasket (4) is composed of an outer sealing portion and an inner insertion portion.

3. The lower plastic structure of the secondary battery according to claim 2, wherein the lower plastic (6) is composed of an outer support part and an inner compressed part.

4. The plastic structure under secondary battery according to claim 3, characterized in that the outside sealing portion of the sealing ring (4) and the inside compressed portion of the lower plastic (6) are fitted and attached.

5. The plastic structure under secondary battery according to claim 4, wherein the terminal post (1) comprises a lower base, a connecting portion disposed in the middle of the lower base, and a boss disposed on the upper surface of the connecting portion, and the lower portion of the boss is provided with an outward protrusion.

6. The plastic structure under the secondary battery according to claim 5, characterized in that the inner compressed part of the lower plastic (6) is provided with a vent groove (7) in the contact area with the surface of the post (1) for releasing the seal of the contact position between the post (1) and the inner compressed part, and the length of the vent groove (7) is equal to or greater than the length of the overlap between the inner compressed part and the surface of the post (1).

7. The plastic structure under secondary battery according to claim 5, characterized in that the inner compressed part of the lower plastic (6) is provided with a vent groove (7) in the contact area with the top cover sheet (5) for releasing the seal of the contact position of the top cover sheet (5) and the inner compressed part.

8. The lower plastic structure for the secondary battery according to claim 5, wherein the upper plastic (3) comprises a first upper plastic ring, a second upper plastic ring and a third upper plastic ring which are integrally formed from outside to inside, and the upper sides of the first upper plastic ring, the second upper plastic ring and the third upper plastic ring are flush with each other and the thicknesses of the first upper plastic ring, the second upper plastic ring and the third upper plastic ring increase in sequence.

9. The plastic structure under secondary battery according to claim 8, characterized in that the third upper plastic ring of the upper plastic (3) has an upper plastic ring groove on the inner side of its lower surface, the upper surface of the sealing ring (4) has an annular protrusion at the position corresponding to the upper plastic ring groove of the upper plastic (3), and the annular protrusion and the upper plastic ring groove are fitted tightly.

10. The lower plastic structure for the secondary battery according to claim 4, wherein the upper side of the contact surface where the outer sealing portion of the sealing ring (4) and the inner compressed portion of the lower plastic (6) are engaged and contacted is an annular inclined surface inclined from outside to inside, and the lower side of the contact surface is an annular vertical surface.