CN103346278A - Sealing body of 3V lithium battery - Google Patents
Sealing body of 3V lithium battery Download PDFInfo
- Publication number
- CN103346278A CN103346278A CN2013102441907A CN201310244190A CN103346278A CN 103346278 A CN103346278 A CN 103346278A CN 2013102441907 A CN2013102441907 A CN 2013102441907A CN 201310244190 A CN201310244190 A CN 201310244190A CN 103346278 A CN103346278 A CN 103346278A
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- China
- Prior art keywords
- seal body
- annular
- lower cover
- sealing body
- lithium battery
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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 loam cake, aluminium film and sealing ring, has an annular protrusion in the middle of the seal body lower cover, and the centre of annular protrusion is provided with the pressure release circular hole; Aluminium film paste covers circular hole on annular protrusion, and its effect is the solution leakage that prevents inside battery, and during the inside battery pressure abnormity, air pressure inside is broken through aluminium film on the pressure release circular hole, discharges from the steam vent of seal body loam cake, thereby plays the pressure release function simultaneously.As follows in the attached technology of Aluminium film paste: as to attach PE film at aluminium film surface earlier, the aluminium film is adsorbed onto on the seal body lower cover annular protrusion of stainless steel, with the high temperature aluminium film of perming, because PE is subjected to thermal contraction, fusion, so the aluminium film is under instantaneously heated situation, can stick on the annular protrusion of lower cover, the pressure release circular hole is sealed.Because the limitation of the attached technology of Aluminium film paste, when the air pressure of inside battery slowly rises to greater than about 1.00Mpa but when not reaching the pressure release standard, the aluminium film can be as normally from middle circular hole explosion, and may take off from the edge, will cause the leakage of battery like this.
Summary of the invention
Technical problem to be solved by this invention provides and a kind ofly both can prevent that the aluminium film edge from having taken off, again the normal seal body of the 3V lithium battery of pressure release.
The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of seal body of 3V lithium battery, comprise seal body lower cover and seal body loam cake, be provided with hermetically-sealed construction between described seal body lower cover and the seal body loam cake, the centre of described seal body lower cover is provided with the pressure release circular hole, described Aluminium film paste is attached to cover under the seal body described pressure release circular hole is covered, described seal body loam cake is provided with raised cap, described raised cap is provided with steam vent, in the described raised cap packing ring is installed, described packing ring is the annular solid with a centre bore, described annular solid lower end is pressed in the aluminium film place that covers under the 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, and described centre bore communicates with described steam vent by described air vent hole.
The upper end of annular solid evenly is provided with three separate boss, described fluting is two interval regions between the boss, described raised cap is provided with two steam vents, two steam vents are symmetrically distributed on the 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, made things convenient for the packing ring installation simultaneously, need not painstakingly will slot and aim at steam vent, when the gas of inside battery is released, have at least the part that queues hole or two steam vents can be corresponding with fluting, the boss on the packing ring can not blocked steam vent.
Described hermetically-sealed construction comprises bending structure and the sealing ring of seal body lower cover, and described sealing ring is arranged between the outward flange and bending structure of seal body loam cake.
Be provided with the thermistor of annular between the annular base of described seal body lower cover and the annular bottom of seal body loam cake.This resistance is processed through special process by high molecular polymer and electric conducting material, and under the electric current normal operation of this resistance in circuit, impedance is less, and the heat of generation is also little; When overload or short circuit took place circuit, electric current sharply rose, and the PTC impedance is risen rapidly, limited big electric current and passed through, thereby play the effect of protective circuit or electrical appliance.
The annular solid lower end is provided with the first concentric convex tendon and second convex tendon, the cross section of described first convex tendon and second convex tendon is tapered, the sharp-pointed portion of described first convex tendon and second convex tendon is pressed in the aluminium film on the annular relief, can push down the aluminium film on the 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 the annular solid lower end is pressed in the aluminium film place on the annular relief.
Compared with prior art, advantage of the present invention is to utilize the lower end of packing ring to push down the aluminium film edge, after the battery pressure rises arrives normal burst pressure, make the gas can be from the normal explosion of pressure release circular hole in the middle of the aluminium film, avoid the deficiency because of attachment process, the aluminium film is taken off from the edge in advance not reaching normal burst pressure, prevent the leakage of electrolyte.
Description of drawings
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 among Fig. 3;
Fig. 6 is the stereogram of packing ring of the present invention.
Embodiment
Describe in further detail below in conjunction with the present invention of accompanying drawing embodiment.
A kind of seal body of 3V lithium battery, comprise seal body lower cover 1 and seal body loam cake 2, be provided with hermetically-sealed construction between seal body lower cover 1 and the seal body loam cake 2, the centre of seal body lower cover 1 is provided with annular relief 3, annular relief 3 centers are provided with pressure release circular hole 4, aluminium film 5 is attached on the annular relief 3 pressure release circular hole 4 is covered, seal body loam cake 2 is provided with raised cap 6, raised cap 6 is provided with steam vent 7, in the raised cap 6 packing ring is installed, packing ring is the annular solid 9 with a centre bore 8, annular solid 9 lower ends are pressed on the annular relief 3, centre bore 8 is corresponding with pressure release circular hole 4, and the annular solid 9 of packing ring is provided with air vent hole, and centre bore 8 communicates with steam vent 7 by air vent hole.
The upper end of annular solid 9 evenly is provided with three separate boss 11, fluting 10 is two interval regions between the boss 11, raised cap 6 is provided with two steam vents 7, two steam vents 7 are symmetrically distributed on the 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 and bending structure 12 of seal body loam cake 2.
Be provided with the thermistor 16 of annular between the annular following 15 of the annular base 14 of seal body lower cover 1 and seal body loam cake 2.It is tapered that annular solid 9 lower ends are provided with the cross section of the first concentric convex tendon 17 and second convex tendon, 18, the first convex tendons 17 and second convex tendon 18, the aluminium film of sharp-pointed portion on annular relief 3 that first convex tendon 17 and second convex tendon 18 are pressed.
Claims (7)
1. the seal body of a 3V lithium battery, comprise seal body lower cover and seal body loam cake, be provided with hermetically-sealed construction between described seal body lower cover and the seal body loam cake, the centre of described seal body lower cover is provided with the pressure release circular hole, described Aluminium film paste is attached to cover under the seal body described pressure release circular hole is covered, described seal body loam cake is provided with raised cap, described raised cap is provided with steam vent, it is characterized in that in the described raised cap packing ring being installed, described packing ring is the annular solid with a centre bore, described annular solid lower end is pressed in the aluminium film place that covers under the 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, and described centre bore communicates with described steam vent by described air vent hole.
2. the seal body of a kind of 3V lithium battery according to claim 1 is characterized in that described steam vent is arranged on the arc-shaped transition district on the raised cap, and described air vent hole is the fluting that is arranged on the annular solid upper end, and described fluting communicates with described steam vent.
3. the seal body of a kind of 3V lithium battery according to claim 2, the upper end that it is characterized in that annular solid evenly is provided with three separate boss, described fluting is two interval regions between the boss, described raised cap is provided with two steam vents, two steam vents are symmetrically distributed on the raised cap, and the sector crosssection area of described fluting is greater than the sector crosssection area of boss.
4. 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, and described sealing ring is arranged between the outward flange and bending structure of seal body loam cake.
5. the seal body of a kind of 3V lithium battery according to claim 2 is characterized in that being provided with between the annular bottom of the annular base of described seal body lower cover and seal body loam cake the thermistor of annular.
6. the seal body of a kind of 3V lithium battery according to claim 1, it is characterized in that the annular solid lower end is provided with the first concentric convex tendon and second convex tendon, the cross section of described first convex tendon and second convex tendon is tapered, the aluminium film of sharp-pointed portion on annular relief that described first convex tendon and second convex tendon are pressed.
7. 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 the annular solid lower end is pressed in the aluminium film place on the 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 true CN103346278A (en) | 2013-10-09 |
| CN103346278B CN103346278B (en) | 2015-04-29 |
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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 |
|---|---|
| CN (1) | CN103346278B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993080A (en) * | 2015-06-03 | 2015-10-21 | 宁波超霸能源有限公司 | Sealing body for lithium battery |
| CN104993079A (en) * | 2015-05-29 | 2015-10-21 | 周虎 | Cylindrical lithium ion battery with secondary sealing valve |
| CN105655517A (en) * | 2016-04-06 | 2016-06-08 | 宁波超霸能源有限公司 | Gasket and lithium battery sealing body using same |
-
2013
- 2013-06-18 CN CN201310244190.7A patent/CN103346278B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104993079A (en) * | 2015-05-29 | 2015-10-21 | 周虎 | Cylindrical lithium ion battery with secondary sealing valve |
| CN104993079B (en) * | 2015-05-29 | 2020-09-29 | 周虎 | Cylindrical lithium ion battery with secondary sealing valve |
| CN104993080A (en) * | 2015-06-03 | 2015-10-21 | 宁波超霸能源有限公司 | Sealing body for lithium battery |
| 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 |
| CN105655517A (en) * | 2016-04-06 | 2016-06-08 | 宁波超霸能源有限公司 | Gasket and lithium battery sealing body using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103346278B (en) | 2015-04-29 |
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