CN103346278B - Sealing body of 3V lithium battery - Google Patents
Sealing body of 3V lithium battery Download PDFInfo
- Publication number
- CN103346278B CN103346278B CN201310244190.7A CN201310244190A CN103346278B CN 103346278 B CN103346278 B CN 103346278B CN 201310244190 A CN201310244190 A CN 201310244190A CN 103346278 B CN103346278 B CN 103346278B
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- China
- Prior art keywords
- seal body
- annular
- lower cover
- sealing body
- lithium battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The invention discloses a sealing body of a 3V lithium battery. The sealing body comprises a sealing body lower cover and a sealing body upper cover, a sealing structure is disposed between the sealing body lower cover and the sealing body upper cover; the middle of the sealing body lower cover is provided with a pressure-relief circular hole; an aluminum film is adhered on the sealing body lower cover and covers the pressure-relief circular hole; the sealing body upper cover is provided with a raised cap which is provided with a vent hole. The sealing body is characterized in that a gasket is installed in the raised cap; the gasket is a ring-shaped body with a central hole; the lower end of the ring-shaped body presses at the position of the aluminum film on the sealing body lower cover; the central hole is corresponding to the pressure-relief circular hole; the ring-shaped body of the gasket is provided with an air hole; and the central hole is communicated with the vent hole through the air hole. The sealing body has the advantages that by pressing the aluminum film edges with the lower end of the gasket, air can be exploded normally from the central hole in the middle of the aluminum film when the battery pressure rises to a normal explosion pressure, so that disadvantages that the aluminum film is peeled off from the edges before the battery pressure rises to the normal explosion pressure caused by an attachment process can be overcome, thereby preventing leakage of the electrolyte.
Description
Technical field
The present invention relates to a kind of 3V lithium battery, especially relate to a kind of seal body of 3V lithium battery.
Background technology
The seal body structure of traditional 3V lithium battery comprises seal body lower cover, PTC, seal body upper cover, aluminium film and sealing ring, and have an annular protrusion in the middle of seal body lower cover, the centre of annular protrusion is provided with pressure release circular hole; Aluminium film paste is on annular protrusion, and covered by circular hole, its effect is the solution leakage preventing inside battery, and simultaneously during inside battery pressure abnormity, air pressure inside breaks through aluminium film on pressure release circular hole, discharges, thus play decompression function from the steam vent of seal body upper cover.As follows in the attached technique of Aluminium film paste: first to attached to PE film at aluminium film surface, aluminium film is adsorbed onto on the seal body lower cover annular protrusion of stainless steel, to perm boiling hot aluminium film with high temperature, because PE heat shrinkable, melting, so aluminium film is in instantaneously heated situation, can stick on the annular protrusion of lower cover, pressure release circular hole is sealed.Due to the limitation of the attached technique of Aluminium film paste, when the air pressure of inside battery slowly rise to be greater than about 1.00Mpa time but do not reach pressure release standard time, aluminium film from middle circular hole explosion as normal, and from edge is de-, can not may will cause the leakage of battery like this.
Summary of the invention
Technical problem to be solved by this invention is to provide one and both can have prevented aluminium film edge from taking off, again can the seal body of the normal 3V lithium battery of pressure release.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of seal body of 3V lithium battery, comprise seal body lower cover and seal body upper cover, hermetically-sealed construction is provided with between described seal body lower cover and seal body upper cover, the centre of described seal body lower cover is provided with pressure release circular hole, described Aluminium film paste covers under being attached to seal body and is covered by described pressure release circular hole, described seal body upper cover is provided with raised cap, described raised cap is provided with steam vent, in described raised cap, packing ring is installed, described packing ring is the annular solid with a centre bore, the aluminium film place covered under described annular solid lower end is pressed in seal body, described centre bore is corresponding with described pressure release circular hole, the annular solid of described packing ring is provided with air vent hole, described centre bore is communicated with described steam vent by described air vent hole.
The upper end of annular solid is evenly provided with three separate boss, described fluting is the interval region between two boss, described raised cap is provided with two steam vents, two steam vents are symmetrically distributed in raised cap, and the sector crosssection area of described fluting is greater than the sector crosssection area of boss.The processing of packing ring is more convenient, facilitate packing ring to install, without the need to deliberately fluting being aimed at steam vent, when the gas of inside battery is released simultaneously, the local having at least one to queue hole or two steam vents can be corresponding with fluting, and the boss on packing ring all can not block steam vent.
Described hermetically-sealed construction comprises bending structure and the sealing ring of seal body lower cover, between the outward flange that described sealing ring is arranged on seal body upper cover and bending structure.
The annular base of described seal body lower cover and the annular of seal body upper cover below between be provided with the thermistor of annular.This resistance is processed through special process by high molecular polymer and electric conducting material, and under this resistance electric current normal operation in circuit, impedance is less, and the heat of generation is also little; When overload or short circuit occur circuit, electric current sharply rises, and PTC impedance is risen rapidly, and restriction big current passes through, thus plays the effect of protective circuit or electrical appliance.
Annular solid lower end is provided with the first concentric convex tendon and the second convex tendon, the first described convex tendon and the cross section of the second convex tendon tapered, the first described convex tendon and the sharp-pointed portion of the second convex tendon are pressed in the aluminium film in annular relief, can push down the aluminium film in annular relief better.
Seal body lower cover center is provided with annular relief, and described pressure release circular hole is positioned at the center of annular relief, and annular solid lower end is pressed in the aluminium film place in annular relief.
Compared with prior art, advantage of the present invention utilizes the lower end of packing ring to push down aluminium film edge, after battery air-pressure rises to normal burst pressure, make gas can from the normal explosion of pressure release circular hole in the middle of aluminium film, avoid the deficiency because of attachment process, making aluminium film not reaching normal burst pressure in advance from edge is de-, preventing the leakage of electrolyte.
Accompanying drawing explanation
Fig. 1 is cutaway view of the present invention;
Fig. 2 is cutaway view of the present invention;
Fig. 3 is the cutaway view of packing ring of the present invention;
Fig. 4 is the vertical view of packing ring of the present invention;
Fig. 5 is the enlarged drawing of A in Fig. 3;
Fig. 6 is the stereogram of packing ring of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
A kind of seal body of 3V lithium battery, comprise seal body lower cover 1 and seal body upper cover 2, hermetically-sealed construction is provided with between seal body lower cover 1 and seal body upper cover 2, the centre of seal body lower cover 1 is provided with annular relief 3, annular relief 3 center is provided with pressure release circular hole 4, aluminium film 5 is attached in annular relief 3 and is covered by pressure release circular hole 4, seal body upper cover 2 is provided with raised cap 6, raised cap 6 is provided with steam vent 7, in raised cap 6, packing ring is installed, packing ring is the annular solid 9 with a centre bore 8, annular solid 9 lower end is pressed in annular relief 3, centre bore 8 is corresponding with pressure release circular hole 4, the annular solid 9 of packing ring is provided with air vent hole, centre bore 8 is communicated with steam vent 7 by air vent hole.
Steam vent 7 is arranged on the arc-shaped transition district in raised cap 6, and air vent hole is the fluting 10 being arranged on annular solid upper end, and fluting 10 communicates with steam vent 7.
The upper end of annular solid 9 is evenly provided with three separate boss 11, fluting 10 is the interval region between two boss 11, raised cap 6 is provided with two steam vents 7, two steam vents 7 are symmetrically distributed in raised cap 6, and the sector crosssection area of fluting 10 is greater than the sector crosssection area of boss 11.
Hermetically-sealed construction comprises bending structure 12 and the sealing ring 13 of seal body lower cover 1, and sealing ring 13 is arranged between the outward flange of seal body upper cover 2 and bending structure 12.
The thermistor 16 of annular is provided with between the annular base 14 of seal body lower cover 1 and the annular following 15 of seal body upper cover 2.The cross section that annular solid 9 lower end is provided with the first concentric convex tendon 17 and the second convex tendon 18, first convex tendon 17 and the second convex tendon 18 is tapered, the aluminium film of sharp-pointed portion in annular relief 3 of the first convex tendon 17 and the second convex tendon 18 pressure.
Claims (5)
1. the seal body of a 3V lithium battery, comprise seal body lower cover and seal body upper cover, hermetically-sealed construction is provided with between described seal body lower cover and seal body upper cover, the centre of described seal body lower cover is provided with pressure release circular hole, Aluminium film paste covers under being attached to seal body and is covered by described pressure release circular hole, described seal body upper cover is provided with raised cap, described raised cap is provided with steam vent, it is characterized in that, in described raised cap, packing ring is installed, described packing ring is the annular solid with a centre bore, the aluminium film place covered under described annular solid lower end is pressed in seal body, described centre bore is corresponding with described pressure release circular hole, the annular solid of described packing ring is provided with air vent hole, described centre bore is communicated with described steam vent by described air vent hole,
Described steam vent is arranged on the arc-shaped transition district in raised cap, and described air vent hole is the fluting being arranged on annular solid upper end, and described fluting communicates with described steam vent.
2. the seal body of a kind of 3V lithium battery according to claim 1, it is characterized in that the upper end of annular solid is evenly provided with three separate boss, described fluting is the interval region between two boss, described raised cap is provided with two steam vents, two steam vents are symmetrically distributed in raised cap, and the sector crosssection area of described fluting is greater than the sector crosssection area of boss.
3. the seal body of a kind of 3V lithium battery according to claim 1, is characterized in that described hermetically-sealed construction comprises bending structure and the sealing ring of seal body lower cover, between the outward flange that described sealing ring is arranged on seal body upper cover and bending structure.
4. the seal body of a kind of 3V lithium battery according to claim 1, the annular that it is characterized in that the annular base of described seal body lower cover and seal body upper cover below between be provided with the thermistor of annular.
5. the seal body of a kind of 3V lithium battery according to claim 1, is characterized in that seal body lower cover center is provided with annular relief, and described pressure release circular hole is positioned at the center of annular relief, and annular solid lower end is pressed in the aluminium film place in annular relief.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310244190.7A CN103346278B (en) | 2013-06-18 | 2013-06-18 | Sealing body of 3V lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310244190.7A CN103346278B (en) | 2013-06-18 | 2013-06-18 | Sealing body of 3V lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103346278A CN103346278A (en) | 2013-10-09 |
| CN103346278B true CN103346278B (en) | 2015-04-29 |
Family
ID=49281061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310244190.7A Active CN103346278B (en) | 2013-06-18 | 2013-06-18 | Sealing body of 3V lithium battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN103346278B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993079B (en) * | 2015-05-29 | 2020-09-29 | 周虎 | Cylindrical lithium ion battery with secondary sealing valve |
| CN104993080B (en) * | 2015-06-03 | 2017-03-29 | 宁波超霸能源有限公司 | A kind of lithium battery seal body |
| CN105655517B (en) * | 2016-04-06 | 2018-03-20 | 宁波超霸能源有限公司 | Packing ring and the lithium battery seal body using the packing ring |
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2013
- 2013-06-18 CN CN201310244190.7A patent/CN103346278B/en active Active
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| Publication number | Publication date |
|---|---|
| CN103346278A (en) | 2013-10-09 |
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| C14 | Grant of patent or utility model | ||
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