CN1004316B - Sealing cushion of explosion-proof seal cell - Google Patents
Sealing cushion of explosion-proof seal cell Download PDFInfo
- Publication number
- CN1004316B CN1004316B CN85108729.9A CN85108729A CN1004316B CN 1004316 B CN1004316 B CN 1004316B CN 85108729 A CN85108729 A CN 85108729A CN 1004316 B CN1004316 B CN 1004316B
- Authority
- CN
- China
- Prior art keywords
- sealing gasket
- gasket
- sealing
- explosion
- groove
- Prior art date
- 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.)
- Expired
Links
Images
Classifications
-
- 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
Landscapes
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
To obtain a gasket, with high reliability, which is securely operated under lower pressure without making thickness of the thin face part extremely thin by making a molecular orientation of polymer on the surrounding part of a breaking groove formed in the sealed gasket, approximately in parallel to the groove. The sealed gasket 20 for explosion-proof alkaline cell is an injection molding product of polypropylene or the like, integratedly formed of the boss part 22, inner cylindrical part 24, corn-shaped slant face part 26, and outer cylindrical part 28. When the gas pressure inside the cell becomes abnormally high, the gasket inner cylindrical part 24 is broken with a longitudinal groove 24a along the axial direction serving as a starting point. In this sealed gasket 20, the molecular orientation of polymer on the surrounding part of the longitudinal groove 24a is in parallel to the longitudinal 24a. For this reason, this part is inclined to be cracked along the longitudinal groove 24a, so the residual thickness of the longitudinal groove 24a need not be made extremely thin. Therefore, the control of dimension during molding is performed more easily, and the dispersion of operating pressure, caused by molding error and temperature, can be reduced. Polypropylene, on account of being strong in molecular orientation, is suitable for composing the sealed gasket.
Description
The present invention relates to be applicable to the sealing gasket that seals of cylindrical shape alkaline cell etc., particularly relate to when inner pressure of battery unusual when high, can sealing gasket is disrumpent feelings, emit the sealing cushion of explosion-proof seal cell of gas safely.
Having in the round-ended cylinder shape anode tube of common cylindrical shape alkaline cell, loading generating element with one heart, the openend of anode tube is sealed with the plastic negative terminal sheet that seals sealing gasket and plate-like.Seal sealing gasket and be by center projections part, be compressed in the urceolus part between above-mentioned anode tube open end edge part and the negative terminal sheet marginal portion and connect above-mentioned bossing and plastic monoblock molded part that the connecting portion branch of above-mentioned urceolus part constitutes with the hole that current collecting bar passed that is inserted into the generating element center.
By the inside crimping of the edge of opening of anode tube (crimping processing), the urceolus that seals sealing gasket partly is compressed in and the peripheral part of negative terminal sheet between.At this moment, because the effect of the elastic force of extruding force and sealing gasket, anode tube is by liquid seal, air seal.Above-mentioned coupling part of sealing sealing gasket has circular ditch part and the warpage part concentric with bossing, plays the extruding force that prevents to be added on the urceolus bossing and inner cylindrical portion are caused harmful effect, thereby play cushioning effect.
As everyone knows, alkaline cell etc. are when charging and discharge, portion produces gas tempestuously within it, causes that therefrom cell internal pressure increases unusually, thereby causes leakage, even the danger of breaking arranged, therefore, technology is provided with certain blast resistance construction on the most of alkali battery, in having the battery of said structure in the past, a part of sealing sealing gasket is done the grooving shape, vulnerable area is set, and, air vent hole is set on terminal plate.When strength in the battery is unusual when high, its pressure acts on and seals on the sealing gasket, as the breach, sealing gasket is broken with above-mentioned vulnerable area, outwards emits gas by the air vent hole on disrumpent feelings part and the above-mentioned terminal plate.
This blast resistance construction most important is that when its battery internal gas pressure value reached predetermined value, the vulnerable area that seals sealing gasket really can be disrumpent feelings.If the pressure that sealing gasket breaks that is the operating pressure of explosion-proof mechanism are certain, and very little with the error of batch product, and then the explosion-proof type battery is considered to safe and reliable.
But, the operating pressure of original explosion-proof type battery seal sealing gasket be made unanimity, be very difficult thereby eliminate the explosion-resistance characteristic error, can not obtain sufficient reliability.This is because will be under certain air pressure inside, above-mentioned vulnerable area is broken be unusual difficulty.Even the groove shape size to vulnerable area is carried out various improvement,, can not under certain pressure, it be broken because small mismachining tolerance and ambient temperature etc. is different.
Particularly to be manufactured on 25-40Kg/CM
2Lower pressure under, can move safely and steadly seal sealing gasket very the difficulty.Because sealing sealing gasket employed is softness and the plastics of flexible, so in the time of often can seeing the battery internal gas pressure and reach the numerical value of defined, the vulnerable area of sealing gasket stretches and the phenomenon that do not rupture, therefore, for sealing gasket is broken under necessity, lower pressure, the vulnerable area that just must make sealing gasket as thin as a wafer.Yet if do the thickness of vulnerable area as thin as a wafer, its size is just very difficult to be grasped, and error also can increase.
Through untiringly and research repeatedly, start with and finished the present invention then by the orientation of the polymer molecule from seal sealing gasket for the problem on the prior art that must solve for inventors of the present invention.Its main purpose is, even provide a kind of not under vulnerable area situation as thin as a wafer, also can be with lower pressure, and guarantee that explosion-proof type battery that vulnerable area breaks is with sealing sealing gasket.
This invention is to form linear channel at the regulation position of sealing sealing gasket vulnerable area is set, and, to make orientation and this groove cardinal principle of polymer molecule of this groove periphery parallel at least.
Optimal situation is, it is radial that the orientation of the above-mentioned polymer molecule that seals sealing gasket partly is with the center projections of sealing sealing gasket that the center is, and like this, this groove can partly be that the concentric circles at center becomes the direction of orthogonal to extend with center projections just.
Plastic molded article is easy to break on the direction parallel with the orientation of polymer molecule, and with the direction of the orientation quadrature of polymer molecule on be difficult for breaking.This and bamboo easily break on its machine direction, are same reasons with then being difficult for breaking on the direction of fiber quadrature.For the sealing gasket that seals of the present invention, because above-mentioned linear channel parallels with the orientation of peripheral polymer molecule.So it is not really thin that the remaining wall thickness of trench portions had both made, and also breaks easily along this groove.
In addition, constituting the polymer molecule seal sealing gasket and be with center projections is the center partly, when being radial arrangement, for annular groove and even warpage part, this part had obtained reinforcement when the orientation of this molecule became radial, thereby played the additional effect that improves sealing property.
Below, describe suitable example of the present invention in detail with reference to accompanying drawing.
Fig. 1 has the part sectioned view that the present invention seals the first example cylinder type alkaline cell of sealing gasket; Fig. 2 is this profile that seals sealing gasket; Fig. 3 is this profile that seals the major part of sealing gasket; Fig. 4 and Fig. 5 are respectively the cutaway view that seals sealing gasket and the plane graph of the present invention's second example.
Fig. 1 seals an example of the explosion-proof type alkaline cell of sealing gasket for using the present invention, in round-ended cylinder shape anode tube 10 is arranged, is loading the generating element that is made of positive pole 12, dividing plate 14, negative pole 16.At the center of negative pole 16, inserting current collecting bar 18, the upper, open end of anode tube 10 is sealed sealing gasket 20 and negative terminal sheet 30 seals by of the present invention.
Fig. 2 and Fig. 3 have at length expressed above-mentioned situation of sealing sealing gasket 20, and sealing sealing gasket 20 is polyacrylic injection-compression molding spares, and bossing 22, inner cylindrical portion 24, coupling part 26,28 one-tenth of urceolus parts are as a whole.On coupling part 26, be provided with for the annular groove that plays cushioning effect and warpage part 27(to call (ring-type buffer trench) in the following text).These inner cylindrical portion 24, ring-type buffer portion 27, urceolus part 28 are concentric with bossing 22 respectively.In the centre bore of bossing 22, closely setting-in above-mentioned current collecting bar 18.Current collecting bar 18 runs through and leads in centre bore.Urceolus part 28 assemblies are in the inboard of the openend of anode tube 10, and negative terminal sheet 30 assemblies are in the inboard of urceolus part 28.The openend of anode tube 10 is crimping to the inside, urceolus part 28 is inwardly compressed, thereby urceolus part 28 is compressed between the negative pole end utmost point 30 of anode tube 10.Like this, inside battery is sealed really.And ring-type buffer trench 27 is to be provided with in order not make powerful stress reach bossing 22 and inner cylindrical portion 24, and when the thrust that puts on urceolus part 28 was excessive, thrust was absorbed by strain.In addition, as shown in Figure 1, negative terminal sheet 30 is provided with venthole 30a.
On the ad-hoc location of the outer peripheral face of inner cylindrical portion 24, formed longitudinal furrow 24a along axis direction.The remaining wall thickness of this longitudinal furrow 24a partly is exactly aforesaid vulnerable area.In a word, when the inside battery pressure abnormity was high, sealing gasket inner cylindrical portion 24 was that the starting point generation is broken with this longitudinal furrow 24a, and internal gas discharges by its break part and venthole 30a.
Particularly, seal on the sealing gasket 20 of the present invention, the orientation of the polymer molecule of the marginal portion of above-mentioned longitudinal furrow 24a is parallel with longitudinal furrow 24a.Arrow a has represented the molecules align direction of the longitudinal furrow 24a part on the sealing gasket inner cylindrical portion 24 among Fig. 3.
Because longitudinal furrow 24a is parallel with the molecules align direction, so, on this part, break easily along longitudinal furrow 24a.In a word, even the battery internal gas pressure is 25～40Kg/CM
2, also can guarantee from the partial rupture of longitudinal furrow 24a.In addition, do not need to do the remaining wall thickness of longitudinal furrow 24a very thin, thereby, make that the error of caused operating pressures such as forming errors and temperature is very little yet than being easier to grasp compact dimensions.
Suitably select the position of shaping position and the metal pattern cast gate of longitudinal furrow 24a, just can realize that the orientation of above-mentioned polymer molecule is parallel with the longitudinal furrow 24a on the sealing gasket inner cylindrical portion 24.
In Fig. 2, at locking wire G
1Shown position is provided with cast gate, from inject the molten state plastics here in die cavity, because plastics are from cast gate G
1About shunting, along the circumferential direction flow.The plastics of molten state also along the circumferential direction flow in inner cylindrical portion 24.Therefore, the polymer molecule orientation that forms in this case is parallel substantially with longitudinal furrow 24a.Different therewith, the G in Fig. 2
2The position, promptly the lower end of center projections part 22 is provided with cast gate, after the plastics of injection are full of bossing 22 substantially, expand radially by the direction of inner cylindrical portion 24 → linking portion 26 → urceolus part 28 and to prolong.That is to say that plastics flow from the top down in inner cylindrical portion 24, thereby the orientation of the polymer molecule of inner cylindrical portion 24 is parallel with longitudinal furrow 24a.
In addition, like this, if it is radial that the orientation that can make polymer molecule is with bossing 22 that the center is, so just can form the quadrature of polymer molecule orientation and ring-type buffer trench direction, therefore do not make ditch 27 buffer loss effects, and can prevent from effectively to chap along ditch 27.This point will be clearer and more definite by the explanation in the back example two.
Inventors of the present invention make LR03 type battery with sealing sealing gasket by two kinds of methods, and a kind of is the G1 position that cast gate is arranged on Fig. 2; Another kind is the position that cast gate is arranged on G2, and they are contained on the LR03 type battery, and its operating pressure has been done comparative test.Much less, the thickness of the degree of depth of ditch 24a and inner cylindrical portion 24 is identical.Its result, the operating pressure that seals sealing gasket (gate location G2) of the present invention is low to moderate 30-32Kg/CM
2, and error is little.In contrast, be not suitable for the operating pressure of sealing gasket (gate location G1) that seals of the present invention up to 46-50Kg-CM
2, and error is big.Under so high operating pressure, be the explosion-proof type battery that can not get safe enough.
In addition, with using above-mentioned two kinds of LR03 type alkaline cells that seal sealing gasket with the current charges of 150MA 24 hours, be equipped with in the battery that is not suitable for sealing gasket of the present invention, 10 have 4 cell fracture.Yet, be fit to but no one of the present invention and break, seal the sealing sealing gasket and break, emit gas safely.
Certainly, seal the shape of sealing gasket 20 and the position of longitudinal furrow 24a etc. and be not only limited to above-mentioned example, can suitably change according to the size of battery.Seal on the sealing gasket 40 at Fig. 4 and the 2nd example of the present invention shown in Figure 5, bossing 42, coupling part 46 and urceolus part 48 are global formation spares, coupling part 46 stretches out from the lower end of bossing 42, form wire ditch 46a above it, that is, and different with example 1, in this example, the ditch 46a that becomes the part of breaking extends along the radial level that seals sealing gasket 40.And coupling part 46 is provided with ring-type buffer trench 47 near urceolus part 48 places, and this ring-type buffer trench part is made up of the ditch of wide V-arrangement section configuration for W, and urceolus part 48 inboard locating, it is concentric with bossing 42.
Form such when sealing sealing gasket 40, the cast gate of metal pattern is arranged on position shown in arrow G among Fig. 43, from here the molten state plastics being injected in the die cavity of metal pattern, so the plastics of injection are expanded radially by the direction of coupling part 46-ring-type buffer trench part 47-urceolus part 48 after roughly being full of bossing 42 fully, thereby, in Fig. 5, the orientation of the polymer molecule shown in the arrow a is almost parallel with ditch 46a, and with ring-type buffer trench 47 quadratures.
Because at length narrated relation about the orientation of ditch 46a and polymer molecule, so, no longer repeat.In addition, compress the extruding force of sealing sealing gasket 40 and reach ring-type buffer trench 47, furrow width W is dwindled.Be exactly because the cushioning effect of ditch portion 47 just makes the bossing 42 at center not be subjected to big active force.Simultaneously, above-mentioned extruding force can make ring-type buffer trench 47 produce be full of cracks along the circumference of ditch.But, because the orientation quadrature of this part and polymer molecule, so, very big along the ditch 47 required stress that breaks, can chap hardly.
And sealing gasket 40 does not produce be full of cracks owing to the effect of external compression power, and the sealing property raising of sealing gasket be can not be ignored.That is, the present invention utilizes the orientation of polymer molecule, can improve battery explosion-proof and the sealing property that seals sealing gasket simultaneously.
Inventors of the present invention have used two kinds of sealing gaskets respectively on LR6 type battery, a kind of is that cast gate is arranged on the position of G3 among Fig. 4; Alternative gate location is arranged on the outer peripheral portion (orientation of the polymer molecule around the ring-type buffer trench 47 is parallel with ditch) that seals sealing gasket urceolus part 48, they are contained on the LR6 type alkaline cell, the comparative test shelf characteric, each 50 on the battery of two kinds of sealing gaskets is housed respectively, and to be placed on temperature be 60 ℃, humidity is under 90% the condition, to preserve 60 days.As a result, use inapplicable the present invention to seal the battery of sealing gasket, because of the be full of cracks that ring-type buffer trench portion takes place has 4 leakages, and the battery that uses the present invention to seal sealing gasket does not have a leakage.In addition,, be not suitable for of the present invention sealing on the sealing gasket really, producing many small crackles, presenting have 12 of albinism with microscopic examination ring-type buffer trench part.Suitable of the present invention sealing on the sealing gasket, some albinisms also be can't see.
And then, because the directivity of polypropylene molecule is very strong, so, need to select the fit closely made sealing gasket that seals of the present invention.
Claims (3)
1, the explosion-proof type battery is with sealing sealing gasket, on its part, formed and be suitable for the groove that breaks as the unusual Gao Shihui of inner pressure of battery, above-mentioned sealing gasket is made with plastics, it is characterized in that at least in the orientation of the polymer molecule at above-mentioned slot wedge place parallel with this groove cardinal principle.
2, the explosion-proof type battery that claim 1 proposed is characterized in that with sealing sealing gasket: it is radial that the orientation of the above-mentioned polymer molecule that seals sealing gasket partly is with this center projections of sealing sealing gasket that the center is.
3, the explosion-proof type battery that proposed of claim 1 or 2 is with sealing sealing gasket, and it is characterized in that: the above-mentioned sealing gasket that seals is the material monolithic moulding with the polypropylene.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59-254147 | 1984-12-03 | ||
| JP59254147A JPS61133552A (en) | 1984-12-03 | 1984-12-03 | Sealed gasket for explosion-proof cell |
| JP254147/84 | 1984-12-03 | ||
| JP59-254969 | 1984-12-04 | ||
| JP59254969A JPS61133553A (en) | 1984-12-04 | 1984-12-04 | Sealed gasket for cylindrical cell |
| JP254969/84 | 1984-12-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85108729A CN85108729A (en) | 1986-06-10 |
| CN1004316B true CN1004316B (en) | 1989-05-24 |
Family
ID=26541558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85108729.9A Expired CN1004316B (en) | 1984-12-03 | 1985-12-02 | Sealing cushion of explosion-proof seal cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1004316B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364719B (en) * | 2011-11-11 | 2013-06-05 | 深圳市豪鹏科技有限公司 | Anti-explosion secondary battery |
-
1985
- 1985-12-02 CN CN85108729.9A patent/CN1004316B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85108729A (en) | 1986-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6136253A (en) | Method for molding duckbill valve | |
| US3219488A (en) | Reinforced combination safety blow-out and gas permeable membrane for alkaline galvanic cells | |
| US6472096B2 (en) | Secondary battery | |
| GB2113458A (en) | Galvanic cell and sealing and insulating member therefor | |
| SG148863A1 (en) | Ink cartridge and method of ink injection thereinto | |
| CN1004316B (en) | Sealing cushion of explosion-proof seal cell | |
| US5527188A (en) | Waterproof connector | |
| ATE83425T1 (en) | INJECTION MOLDING MACHINE. | |
| US7144656B2 (en) | Alkaline battery sealing gasket and sealed alkaline battery | |
| US4309568A (en) | Bushing for electrical leads | |
| JP2000502626A (en) | Ink writing implement | |
| CA2294914A1 (en) | Duckbill valve | |
| US3451110A (en) | Spark plug | |
| US5672025A (en) | Waterproof connector housing, and method and mold for producing same | |
| GB806173A (en) | Improvements in or relating to tubular connections | |
| CN214542395U (en) | Button cell loading jig | |
| AU3803400A (en) | Cassette for storing and insertion of solid medicine | |
| CN109386671A (en) | Hydraulic hose assembly production method for metallurgical equipment | |
| Lobel | A Crux in the Poetics | |
| EP0290806A3 (en) | Polyphenylene ether/siloxane polyetherimide copolymer | |
| JPH0562425B2 (en) | ||
| JPS6323882Y2 (en) | ||
| GB1104638A (en) | Improvements in or relating to closures for barrels | |
| JPS5630110A (en) | Optical fiber connector | |
| JPS6425096A (en) | Capsule for irradiation creep test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |