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Publication numberUS3201284 A
Publication typeGrant
Publication dateAug 17, 1965
Filing dateNov 5, 1962
Priority dateNov 5, 1962
Publication numberUS 3201284 A, US 3201284A, US-A-3201284, US3201284 A, US3201284A
InventorsGrenville B Ellis
Original AssigneeGould National Batteries Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Two-way vent valve for batteries
US 3201284 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

Aug. 17, 1965 B. ELLIS 3,201,284

TWO-WAY VENT VALVE FOR BATTERIES Filed Nov. 5, 1962 M @i ,3 i9

United States Patent 3,201,284 TWO-WAY VENT VALVE FOR BATTERIES Grenville B. Ellis, Easthampton, Mass., assignor to Gould- National Batteries, Inc., a corporation of Delaware Filed Nov. 5, 1962, Ser. No. 235,398 4 Claims. (Cl. 136-178) This invention relates to a pressure release device and particularly to a two-way pressure vent valve for use with containers in which a gas is to be retained under predetermined maximum and minimum pressures as in storage battery containers of the normally closed type. A subatmospheric pressure or low vacuum may develop under some conditions in such containers and under other conditions dangerously high pressure may build up and require the release of gas to the atmosphere. Dangerously low internal pressure may be caused by chemical reaction of the gases with the active material in the container or when the cell or battery is used under extremely low temperature conditions, requiring the opening of the valve to admit air to the container.

It is an object of this invention to provide a novel, simple and reliable two-way vent valve which will permit gas to flow either from the interior of the cell container or into the interior of a normally sealed container when a predetermined pressure differential exists between the gas within the container and the outside atmospheric pressure, thus preventing damage to the container that might otherwise result from excessively high or low internal pressures.

Another object is to provide a vent device which will allow the flow of gas either from or into a container when the pressure therein varies a predetermined limit from atmospheric pressure, while insuring the closing and sealing of the container when the pressure differential has been alleviated.

The invention also includes certain other novel features of construction which will be more fully pointed out in the following specification and claims.

In the drawing:

FIGURE 1 is a plan view of a battery cell provided with one of my improved two-way vent valves;

FIG. 2 is a side elevational view showing the vent valve in place on a battery container;

FIG. 3 is a central vertical sectional view showing a preferred form of my two-way vent valve separate from the container;

FIG. 4 is a horizontal sectional view taken on the line 4-4 of FIG. 3, and

FIG. 5 is a side elevational view showing the tubular body member of my improved valve.

Referring to FIGS, 1 and 2, a battery container subject to variable internal gas pressure is indicated generally at 6, the cover of the container is indicated at 7, positive and negative terminals are indicated at 8 and ,8a respectively, and one of my improved pressure vent valves is indicated generally at 9. As shown in FIGS. 3 and 5, the valve 9 has a vertically elongated tubular body 10 formed with an externally threaded lower end portion 11 adapted to fit in a threaded opening in the cell cover 7. An upper end portion 12 of the Valve body may be formed with a cross slot 13 in its upper end surface to facilitate turning the body to and from its assembled position in the threaded opening in the cover.

An annular groove indicated generally by the numeral 14 is formed in the outer periphery of the body 10, being defined by spaced parallel annular shoulders 15 and 16 and adjacent cylindrical surfaces 17 and 18. An enlargement 19 of the annular groove 14 is disposed radially inward therefrom and is connected by radial passages 29 to a vertically elongated passage 21 extending to the lower end of the tubular body 10.

3,2di284 Patented Aug. 17, 1965 ICC Sealing rings 22 and 23 are confined under lateral compression and longitudinal tension in the groove -14 between the shoulders 15 and 16. Each of these rings has an annular valve seat surface 24 which is normally in closed, continuous contact with a similar seat surface of the other ring. Beveled outer and] inner surf-aces 22a on the ring 22 converge toward the seat surface 24 and similar beveled surfaces 23a are formed on the ring 23 to converge toward the seat 24.

The rings 22 and 23 are formed from suitably flexible, elastic material, such as a rubber or rubber-like material of selected durometer hardness to permit the separation of the valve seat surfaces 24 for venting the interior of the container upon the development of predetermined gas pressure differentials at the interior and exterior sides of the sealing rings. The rings 22 and 23 may be formed, for example, from neoprene having durometer hardness within the range of 35 to 60. For use with a simple, one-piece valve body these sealing rings should have suflicient elasticity so that they may be expanded and sprung into place in the groove 14 defined by the annular shoulders 15 and 16 and cylindrical surfaces 17 and 18. The annular enlargement 19 disposed radially inwardly from the rings 22 and 23 permits the beveled sections of the rings to be sprung inward for the passage of air into the container when a subatmospheric pressure of predetermined value develops within the container.

The connection between the tubular body 10 and battery cell cover 7 may be sealed by the use of a gasket 25 ('FIG. 3) between an annular shoulder on the body 10 above the threaded lower end portion 11 for contact with an annular surface of the cover 7.

By suitable selection of the composition, shape and dimensions of the rings 22 and 23, a predetermined maximum upper limit may be established for the pressure in a battery cell. Upon the development of a high pressure, approaching the safe upper limit in the con tainer, for example, portions of the rings 22 and 23 adjacent to the contact seat surfaces 24 are separated and sprung outward to relieve the container of excess gas. Subsequently, should the pressure in the container be reduced to a predetermined safe low limit of vacuum, air will be admitted between the sealing rings 22 and 23 so that the gas pressure within the battery container is maintained at all times within safe limits.

Thus in operation when for any reason. a substantial, predetermined pressure differential develops between the gas pressure inside the container and the outside atmospheric pressure, the beveled section of the seal rings 22 and 23 will be deflected from its normal position in the direction of the resultant pressure acting on these rings. If the pressure differential becomes great enough, the seal at the annular seat surface 24 will be broken, and gas will flow from the higher pressure side of the container until the excessive pressure differential has been eliminated. It will also be understood that by selection of the thickness and shape of the coacting seal rings a pressure vent valve in conformance with my invention may be adapted to vent when any predetermined pressure differential is reached. Modifications may be made in the shape of sealing rings described herein without departing from my inventive concept.

I claim:

1. In combination, a normally closed battery container subject to variable internal gas pressure, and a pressure vent valve comprising a tubular body having a lower end portion communicating with the interior of said container and a normally closed upper end portion extending to the exterior of said container and formed with an annular groove in its outer periphery, a plurality of flexible elastic sealing rings confined under lateral compression in said groove, each of said sealing rings having a valve seat surface contacting a valve seat surface of a second sealing ring, and a passage for gas extending through said upper end portion of said body to the exterior thereof adjacent to interior surfaces of said sealing rings, said valve seat surfaces being separable to vent the interior of said container upon the development of predetermined gas pressure diflerentials at the exterior and interior sides of said sealing rings.

2. A combination in accordance with claim 1 in which said body is formed with an annular enlargement of said groove disposed radially inward from said rings to receive and permit the separation of the adjoining portions of said rings when predetermined subatmospheric pressure is created in said container.

3. A combination in accordance with claim 1 in which said sealing rings are formed with annular surfaces con- References Cited by the Examiner UNITED STATES PATENTS 7/50 Wells 136178.1

FOREIGN PATENTS 648,257 12/28 France.

466 1900 Great Britain.

15 WINSTON A. DOUGLAS, Primary Examiner.

JOHN H. MACK, Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2516084 *Oct 4, 1944Jul 18, 1950Willard Storage Battery CoStorage battery
FR648257A * Title not available
GB190000466A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3537903 *Dec 19, 1968Nov 3, 1970Texas Instruments IncPressure releasing feed-through battery terminal
US3957078 *Jun 13, 1974May 18, 1976Maclean-Fogg Lock Nut CompanyWasp excluder and exhaust port protector for air brakes
US4180624 *Jan 24, 1979Dec 25, 1979Varta Batterie AktiengesellschaftStorage battery with aqueous electrolyte and recombiner
US4328290 *Dec 29, 1980May 4, 1982Gould Inc.Battery vent plug
US4549565 *Mar 5, 1984Oct 29, 1985Bs&B Safety Systems, Inc.Reclosing rupture disk assembly
US5082024 *Sep 4, 1990Jan 21, 1992Alb. Klein Gmbh & Co. KgValve assembly including a hollow conduit
US7544439 *Apr 27, 2005Jun 9, 2009The Gillette CompanyVenting water-tight battery-operated devices
US7846570Mar 31, 2009Dec 7, 2010The Gillette CompanyVenting water-tight battery-operated devices
US8247097Jan 28, 2012Aug 21, 2012Tesla Motors, Inc.Method of controlling battery pack humidity utilizing an active reactivation system
US8268469Mar 30, 2011Sep 18, 2012Tesla Motors, Inc.Battery pack gas exhaust system
US8277965Mar 30, 2010Oct 2, 2012Tesla Motors, Inc.Battery pack enclosure with controlled thermal runaway release system
US8361642Aug 15, 2012Jan 29, 2013Tesla Motors, Inc.Battery pack enclosure with controlled thermal runaway release system
US8367233Aug 15, 2012Feb 5, 2013Tesla Motors, Inc.Battery pack enclosure with controlled thermal runaway release system
US8557415May 19, 2012Oct 15, 2013Tesla Motors, Inc.Battery pack venting system
US8557416May 19, 2012Oct 15, 2013Tesla Motors, Inc.Battery pack directed venting system
US8729851Jan 14, 2008May 20, 2014Koehler-Bright Star, Inc.Battery pack for miner's cap lamp with charging and discharging control module
US8922159Feb 27, 2013Dec 30, 2014Koehler-Bright Star, Inc.Battery pack for powering miner's cap lamp
US9040184Jan 28, 2012May 26, 2015Tesla Motors, Inc.Battery pack dehumidifier with active reactivation system
US9362762Sep 9, 2014Jun 7, 2016Koehler-Bright Star LLCBattery pack and cap lamp system
US20060243729 *Apr 27, 2005Nov 2, 2006Martin DiehlVenting water-tight battery-operated devices
US20080169788 *Jan 14, 2008Jul 17, 2008Joseph BobbinBattery pack
US20100136402 *Apr 22, 2009Jun 3, 2010Tesla Motors, Inc.Sealed battery enclosure
US20100273034 *Mar 30, 2010Oct 28, 2010Tesla Motors, Inc.Battery pack enclosure with controlled thermal runaway release system
US20110174556 *Mar 30, 2011Jul 21, 2011Tesla Motors, Inc.Battery Pack Gas Exhaust System
EP0504573A1 *Feb 6, 1992Sep 23, 1992VARTA Batterie AktiengesellschaftMaintenance-free leadaccumulator comprising a two-way relief valve
Classifications
U.S. Classification429/55, 137/493, 137/860, 220/203.28
International ClassificationH01M2/12
Cooperative ClassificationY02E60/12, H01M2/1205, H01M2/1229, H01M2/1294
European ClassificationH01M2/12W, H01M2/12B
Legal Events
DateCodeEventDescription
Apr 12, 1982ASAssignment
Owner name: SAFT AMERICAM INC., 711 INDUSTRIAL BLVD., P.O. BOX
Free format text: ASSIGNS ENTIRE INTEREST. SUBJECT TO LICENSE RECITED.;ASSIGNOR:GOULD INC.;REEL/FRAME:003979/0564
Effective date: 19820331