GB2080492A - Magnetically loaded pressure relief valve - Google Patents

Magnetically loaded pressure relief valve Download PDF

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Publication number
GB2080492A
GB2080492A GB8022964A GB8022964A GB2080492A GB 2080492 A GB2080492 A GB 2080492A GB 8022964 A GB8022964 A GB 8022964A GB 8022964 A GB8022964 A GB 8022964A GB 2080492 A GB2080492 A GB 2080492A
Authority
GB
United Kingdom
Prior art keywords
valve
magnetic
pressure relief
valve member
disc
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.)
Granted
Application number
GB8022964A
Other versions
GB2080492B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chloride Group Ltd
Original Assignee
Chloride Group Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Chloride Group Ltd filed Critical Chloride Group Ltd
Priority to GB8022964A priority Critical patent/GB2080492B/en
Publication of GB2080492A publication Critical patent/GB2080492A/en
Application granted granted Critical
Publication of GB2080492B publication Critical patent/GB2080492B/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0446—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces
    • F16K17/0453—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces the member being a diaphragm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/08—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet
    • F16K31/084—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid using a permanent magnet the magnet being used only as a holding element to maintain the valve in a specific position, e.g. check valves
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/30—Arrangements for facilitating escape of gases
    • H01M50/317—Re-sealable arrangements
    • 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

A pressure relief valve for a recombination electric battery cell comprises a magnetic rubber disc (22) which is normally urged against a magnetic rubber washer (16) by the magnetic force between them. The valve member (22) can be raised if the pressure within the cell at (12) builds up above a precisely determined relief pressure. Gas can be released through openings (26) in a retaining closure (24) defining a protective chamber (14) for the movable valve member. <IMAGE>

Description

SPECIFICATION Pressure relief valves This invention relates to pressure relief valves, and in particular to one way pressure relief valves.
According to the present invention, a pressure relief valve suitable for a battery cell comprises a ferro-magnetic moveable valve member which cooperates with a valve seating member, and magnetic means urging the valve member towards a valve-closed position. The term "ferromagnetic" is used to define materials whose permeability varies with the flux density and includes magnetic materials.
Both valve members may be flexible and/or resilient since a more reliable seal may be obtained with such members.
Preferably the valve members are comprised of magnetic rubber and/or magnetic plastics.
The flexible or resilient valve members may be made from magnetic tape, or magnetic rubber such as that sold under the Trade Name, PLASTIFORM, and produced by the Leyman Corporation, comprising barium ferrite bonded with rubber in sheets and strips. Moulded magnets may also be used as the valve members, with the base polymers for the magnets consisting of one of the following:~ 1. Elastomers, e.g. ethylene-propylene rubber, silicone rubber, flexible polyurethanes.
2. Thermoplastics, e.g. polyolefins, PVC, nylon polyphenylene sulphide thermoplastic polyesters.
3. Cross linkable/thermosetting resins, e.g.
polyurethanes, epoxy resins, polyester resins.
Alternatively, the valve members may be formed by an Alnico or rare earth magnet such as a compound containing cobalt samarium.
This pressure relief valve is particularly useful in a recombination cell. In such a cell released gas re-combines during the battery action, but it is necessary to be able to release gas if a certain pressure, perhaps < 0.5 p.s.i. is exceeded. The release pressure must be fairly precise, and ambient air must not be able to enter the cell.
During high rates of cell charging, gas can be generated at a high rate.
The present pressure relief valve is cheap to produce and easy to assemble. The valve consistently opens when a predetermined pressure difference acts across the valve member.
If the valve member is light and flexible, for example, if it comprises magnetic tape, then the pressure difference to open the valve will be substantially the same whether the valve is upright or upside down, as the pressure only has to exceed the magnetic means urging the valve member to the closed position and the weight of the magnetic tape valve member is negligible.
The magnetic means which urges the moveable valve member towards the valve closed position may include a ferro-magnetic material secured to the valve member. Either or both of the ferromagnetic materials can be magnets. The force provided by the magnetic means to urge the valve member to the valve-closed position may be either an attractive or a repulsive force produced between the two ferro-magnetic materials.
The ferro-magnetic seating member may be secured to the valve housing by adhesive.
Alternatively, the seating member may be an integral part of the valve housing.
The moveable member may be retained in a chamber which protects the member from damage. The chamber may also have vents to allow the gas relieved to escape to the atmosphere.
The invention may be carried into practice in various ways, but one embodiment will now be described by way of example, with reference to the accompanying drawings, in which:~ FIGURE 1 is a cross section through a pressure relief valve; and FIGURE 2 is a plan view of a venting plate used with the pressure relief valve.
The pressure relief valve comprises a valve housing 10 which is secured to, or part of a case (not shown), of a sealed recombination battery cell, containing a liquid electrolyte absorbed in separator material. The valve housing 10 has a connection passage 12 which leads to the interior of the battery case, and a venting chamber 14, of larger diameter than the passage 12, which leads to the atmosphere.
A magnetic rubber washer 16 constituting a valve seat is secured by adhesive or other means in the bottom wall of the chamber 14, and has a valve orifice 20 aligned with the passage 12.
A valve member is constituted by a magnetic rubber disc 22 which is urged against the top of the washer 16 to close the origice 20 by the magnetic force between the magnetic rubber washer 16 and disc 22. The disc 22 is otherwise free to move in the venting chamber 14.
The chamber 14 is closed by a venting plate 24, with bores 26 formed through it (as seen in FIGURE 2).
In use, pressure builds up by gassing in the cell case and acts on the underside of the rubber disc 22 through the passage 12 and the orifice 20 in the washer 16. When the pressure difference across the disc 22 overcomes both the weight of the disc 22 and the force of magnetic attraction between the disc 22 and washer 16, the disc 22 is moved to open the valve; and the gases are vented to the atmosphere through the chamber 14 and the bores 26 in the plate 24. As soon as the pressure drops, the disc 22 moves back into contact with the washer 16 to reclose the valve.
The vent plate 24 has bevelled edges 28 which allow it to be snap-fitted in the upper end of the venting chamber 14.
1. A pressure relief valve comprising a ferromagnetic moveable valve member which cooperates with a valve seating member and magnetic means urging the valve member towards a valve closed position.
2. A valve as claimed in Claim 1 in which the/or
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Pressure relief valves This invention relates to pressure relief valves, and in particular to one way pressure relief valves. According to the present invention, a pressure relief valve suitable for a battery cell comprises a ferro-magnetic moveable valve member which cooperates with a valve seating member, and magnetic means urging the valve member towards a valve-closed position. The term "ferromagnetic" is used to define materials whose permeability varies with the flux density and includes magnetic materials. Both valve members may be flexible and/or resilient since a more reliable seal may be obtained with such members. Preferably the valve members are comprised of magnetic rubber and/or magnetic plastics. The flexible or resilient valve members may be made from magnetic tape, or magnetic rubber such as that sold under the Trade Name, PLASTIFORM, and produced by the Leyman Corporation, comprising barium ferrite bonded with rubber in sheets and strips. Moulded magnets may also be used as the valve members, with the base polymers for the magnets consisting of one of the following:~ 1. Elastomers, e.g. ethylene-propylene rubber, silicone rubber, flexible polyurethanes. 2. Thermoplastics, e.g. polyolefins, PVC, nylon polyphenylene sulphide thermoplastic polyesters. 3. Cross linkable/thermosetting resins, e.g. polyurethanes, epoxy resins, polyester resins. Alternatively, the valve members may be formed by an Alnico or rare earth magnet such as a compound containing cobalt samarium. This pressure relief valve is particularly useful in a recombination cell. In such a cell released gas re-combines during the battery action, but it is necessary to be able to release gas if a certain pressure, perhaps < 0.5 p.s.i. is exceeded. The release pressure must be fairly precise, and ambient air must not be able to enter the cell. During high rates of cell charging, gas can be generated at a high rate. The present pressure relief valve is cheap to produce and easy to assemble. The valve consistently opens when a predetermined pressure difference acts across the valve member. If the valve member is light and flexible, for example, if it comprises magnetic tape, then the pressure difference to open the valve will be substantially the same whether the valve is upright or upside down, as the pressure only has to exceed the magnetic means urging the valve member to the closed position and the weight of the magnetic tape valve member is negligible. The magnetic means which urges the moveable valve member towards the valve closed position may include a ferro-magnetic material secured to the valve member. Either or both of the ferromagnetic materials can be magnets. The force provided by the magnetic means to urge the valve member to the valve-closed position may be either an attractive or a repulsive force produced between the two ferro-magnetic materials. The ferro-magnetic seating member may be secured to the valve housing by adhesive. Alternatively, the seating member may be an integral part of the valve housing. The moveable member may be retained in a chamber which protects the member from damage. The chamber may also have vents to allow the gas relieved to escape to the atmosphere. The invention may be carried into practice in various ways, but one embodiment will now be described by way of example, with reference to the accompanying drawings, in which:~ FIGURE 1 is a cross section through a pressure relief valve; and FIGURE 2 is a plan view of a venting plate used with the pressure relief valve. The pressure relief valve comprises a valve housing 10 which is secured to, or part of a case (not shown), of a sealed recombination battery cell, containing a liquid electrolyte absorbed in separator material. The valve housing 10 has a connection passage 12 which leads to the interior of the battery case, and a venting chamber 14, of larger diameter than the passage 12, which leads to the atmosphere. A magnetic rubber washer 16 constituting a valve seat is secured by adhesive or other means in the bottom wall of the chamber 14, and has a valve orifice 20 aligned with the passage 12. A valve member is constituted by a magnetic rubber disc 22 which is urged against the top of the washer 16 to close the origice 20 by the magnetic force between the magnetic rubber washer 16 and disc 22. The disc 22 is otherwise free to move in the venting chamber 14. The chamber 14 is closed by a venting plate 24, with bores 26 formed through it (as seen in FIGURE 2). In use, pressure builds up by gassing in the cell case and acts on the underside of the rubber disc 22 through the passage 12 and the orifice 20 in the washer 16. When the pressure difference across the disc 22 overcomes both the weight of the disc 22 and the force of magnetic attraction between the disc 22 and washer 16, the disc 22 is moved to open the valve; and the gases are vented to the atmosphere through the chamber 14 and the bores 26 in the plate 24. As soon as the pressure drops, the disc 22 moves back into contact with the washer 16 to reclose the valve. The vent plate 24 has bevelled edges 28 which allow it to be snap-fitted in the upper end of the venting chamber 14. CLAIMS
1. A pressure relief valve comprising a ferromagnetic moveable valve member which cooperates with a valve seating member and magnetic means urging the valve member towards a valve closed position.
2. A valve as claimed in Claim 1 in which the/or each valve member is flexible and/or resilient.
3. A valve as claimed in either of the preceding claims in which the/or each valve member is of magnetic rubber, or magnetic plastics.
4. A valve as claimed in any of the preceding claims, in which the/or each valve member is in the form of a sheet or strip, or is a moulding.
5. A valve as claimed in any of the preceding claims in which the moveable valve member is retained in a protected chamber.
6. A valve as claimed in Claim 5 in which the chamber has vents to atmosphere.
7. A relief valve constructed and arranged substantially as herein specifically described with reference to the accompanying drawings.
.
8. A recombination electric battery cell provided with a pressure relief valve as claimed in any of the preceding claims.
GB8022964A 1980-07-14 1980-07-14 Magnetically loaded pressure relief valve Expired GB2080492B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8022964A GB2080492B (en) 1980-07-14 1980-07-14 Magnetically loaded pressure relief valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8022964A GB2080492B (en) 1980-07-14 1980-07-14 Magnetically loaded pressure relief valve

Publications (2)

Publication Number Publication Date
GB2080492A true GB2080492A (en) 1982-02-03
GB2080492B GB2080492B (en) 1984-06-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB8022964A Expired GB2080492B (en) 1980-07-14 1980-07-14 Magnetically loaded pressure relief valve

Country Status (1)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080107A1 (en) * 1981-11-20 1983-06-01 Siemens Aktiengesellschaft Pressure relief valve for a container
GB2129618A (en) * 1982-10-12 1984-05-16 Mitsubishi Electric Corp Pressure responsive device having an hysteresis characteristic
GB2139491A (en) * 1983-05-12 1984-11-14 Leigh Stewart Prod Bathing apparatus
GB2189777B (en) * 1986-04-10 1990-12-05 Yukizo Kitamura Fluid storing member and its fluid outlet opening/closing mechanism
GB2245955A (en) * 1990-07-09 1992-01-15 Lin Pi Chu Valve assembly for a piston compressor
GB2347732A (en) * 1999-03-11 2000-09-13 Coutier Moulage Gen Ind Magnetic check valve for a door stop
GB2356915A (en) * 1999-11-23 2001-06-06 Envirotech Products Ltd Magnetic venting valve with roll-over mechanism
GB2357569A (en) * 1999-12-23 2001-06-27 Draftex Ind Ltd Pressure activated hydraulic cylinder with magnetic check valves
DE102010049649A1 (en) * 2010-10-28 2012-05-03 Carl Freudenberg Kg Magnetically sealed valve device for a battery housing
CN107740876A (en) * 2017-11-28 2018-02-27 中国化工集团曙光橡胶工业研究设计院有限公司 A kind of thin type gas pressure limiting valve

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080107A1 (en) * 1981-11-20 1983-06-01 Siemens Aktiengesellschaft Pressure relief valve for a container
GB2129618A (en) * 1982-10-12 1984-05-16 Mitsubishi Electric Corp Pressure responsive device having an hysteresis characteristic
GB2139491A (en) * 1983-05-12 1984-11-14 Leigh Stewart Prod Bathing apparatus
GB2189777B (en) * 1986-04-10 1990-12-05 Yukizo Kitamura Fluid storing member and its fluid outlet opening/closing mechanism
GB2245955A (en) * 1990-07-09 1992-01-15 Lin Pi Chu Valve assembly for a piston compressor
GB2347732A (en) * 1999-03-11 2000-09-13 Coutier Moulage Gen Ind Magnetic check valve for a door stop
GB2347732B (en) * 1999-03-11 2001-02-21 Coutier Moulage Gen Ind Directional threshold release valve and devices equipped with such valves
GB2356915A (en) * 1999-11-23 2001-06-06 Envirotech Products Ltd Magnetic venting valve with roll-over mechanism
GB2357569A (en) * 1999-12-23 2001-06-27 Draftex Ind Ltd Pressure activated hydraulic cylinder with magnetic check valves
GB2357569B (en) * 1999-12-23 2004-02-11 Draftex Ind Ltd Hydraulic cylinder
DE102010049649A1 (en) * 2010-10-28 2012-05-03 Carl Freudenberg Kg Magnetically sealed valve device for a battery housing
CN102468462A (en) * 2010-10-28 2012-05-23 卡尔·弗罗伊登伯格公司 Magnetically sealing valve device for a battery casing
EP2448040A3 (en) * 2010-10-28 2012-07-11 Firma Carl Freudenberg Magnetically sealing valve device for a battery casing
CN102468462B (en) * 2010-10-28 2015-04-08 卡尔·弗罗伊登伯格公司 Valve and its uses, related casing or conveying container and electrochemical power supply
CN107740876A (en) * 2017-11-28 2018-02-27 中国化工集团曙光橡胶工业研究设计院有限公司 A kind of thin type gas pressure limiting valve

Also Published As

Publication number Publication date
GB2080492B (en) 1984-06-06

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PCNP Patent ceased through non-payment of renewal fee