GB2189340A - A safety vent plug - Google Patents

A safety vent plug Download PDF

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Publication number
GB2189340A
GB2189340A GB08609609A GB8609609A GB2189340A GB 2189340 A GB2189340 A GB 2189340A GB 08609609 A GB08609609 A GB 08609609A GB 8609609 A GB8609609 A GB 8609609A GB 2189340 A GB2189340 A GB 2189340A
Authority
GB
United Kingdom
Prior art keywords
water
tube
plug
cell
weir
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.)
Withdrawn
Application number
GB08609609A
Other versions
GB8609609D0 (en
Inventor
John James Randall
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB08609609A priority Critical patent/GB2189340A/en
Publication of GB8609609D0 publication Critical patent/GB8609609D0/en
Publication of GB2189340A publication Critical patent/GB2189340A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H01M50/308—Detachable arrangements, e.g. detachable vent plugs or plug systems
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • H01M50/627—Filling ports
    • 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
    • H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
    • H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
    • 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 vent plug for secondary cells has a water inlet tube, a weir (e) over which the water is allowed to fall, a tube (h) which allows gases to escape from the cell by passing through water held in the plug, a tube (g) which allows water to enter the cell, and another weir (k) over which surplus water flows to leave the plug. <IMAGE>

Description

SPECIFICATION A safety vent plug for secondary cells This invention relates to a filling device for electric storage cells.
Many secondary cells, particularly those of the free acid type, lose water in use and this water needs to be replaced. Most smaller cells (up to a capacity of about 2400 smpere hours) are supplied in a completely enclosed box. This reducesthewater loss but also renders the cell liable to explode ifthe mixture of hydrogen and oxygen gases, evolved within the cell, are ignited. The present invention proposes a design of vent plug for enclosed secondary cells which enables waterto be added to the cells under remote or automatic control. The plug also provides a flameproof barrier which prevents external igniting means from exploding the gases in the cell. No alteration to the cell is necessary and it is not necessary to remove the plug to measure the specific gravity of the electrolyte.
According to the present invention there is provided a container having a ventilated lid, various internal passages and weirs, means for admitting water, means for disposing of surplus water, and a means for attaching the device to a cell or mounting.
A feature of the device is that the electrolyte surface is maintained at a predetermined level. The device can also be used on open type cells.
Thefigureshows a cross-section of an embodimentofthe device. A means (a) is provided for retaining the plug in the cell vent. This may be of bayonet or screw th read form according to the design of the cell. A resilient washer (b) is used to ensure gas tightness. Water is admitted to the device via the tube (c),filling the upper chamber (d) to the height of the tube (e) which forms a weir. Water passing over this weir falls to the lower chamber (f) and thence to the cell via the tube (g). The tube (g) dips below the surface ofthe electrolyte. Gases evolved in the cell during charging passupthetube (h) and down the tube (j)whencethey passthrough the water held in the upper chamber (d) and escape to the atmosphere.The gases drive the water level in the tube (j) to the bottom of the tube and this increases the pressure in the cell by the difference in water level between the top of the tube (e) and the bottom of the tube (j). This pressure raises the level ofthe electrolyte in the tube (g). When this level reaches the weir (k) any water added to the lower chamberflows overthe weir (k) and leaves the device via the tube (I). A ventilating hole (m) keeps the lower chamber (f) at atmospheric pressure. The lid (n) isa loosefitto allowgasestoescape.
Although the device, as described, uses gas pressure to produce an electrolyte level differential, the differential can be produced in anotherway. If the tube (g) is lengthened to about 600 mm., water running into tube (g) will be counterbalanced by the heavier acid in the cell and the level of the waterwill rise to the weir (k). Atthis stage no morewaterwill enter the tube (9). In this way the device can be used to "top up" open cells.
The water admitted to the tube (c) may be supplied via a pump or a valve under manual or automatic control.
Gases bubbling through the water in the chamber (d) will be "washed" by this action so that noxious substances (such as arsenic, antimony, and acid aerosol) will be trapped and eventually returned to the cell.
The tube (e) may befitted with a sliding extension so asto adaptthe device to different sized cells.
A bung (p) in the lid may be removed to allow a hydrometer tube to be inserted.

Claims (5)

1. A secondary cell plug havingameanstoadmit watertothe cell, a means of regulating the gas pressure in the cell, and a weir over, which surplus water flows.
2. A plug as claimed in claim 1 in which the gas pressure regulating means is a hydraulic head.
3. A plug as claimed in claims 1 or2 in which the gas pressure regulating means is adjustable.
4. A device for "topping up" open secondary cells in which supplied water is diverted over a weir when water in a tube which dips into the electrolyte is counterbalanced by the pressure of the electrolyte.
5. Asecondarycell plug substantially as described herein with reference to the accompanying drawing.
GB08609609A 1986-04-19 1986-04-19 A safety vent plug Withdrawn GB2189340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08609609A GB2189340A (en) 1986-04-19 1986-04-19 A safety vent plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08609609A GB2189340A (en) 1986-04-19 1986-04-19 A safety vent plug

Publications (2)

Publication Number Publication Date
GB8609609D0 GB8609609D0 (en) 1986-05-21
GB2189340A true GB2189340A (en) 1987-10-21

Family

ID=10596500

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08609609A Withdrawn GB2189340A (en) 1986-04-19 1986-04-19 A safety vent plug

Country Status (1)

Country Link
GB (1) GB2189340A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1099741A (en) * 1964-04-09 1968-01-17 Electric Power Storage Ltd Topping up devices
GB1516907A (en) * 1975-08-26 1978-07-05 Daimler Benz Ag Batteries
GB2016798A (en) * 1978-03-15 1979-09-26 Chloride Group Ltd Vented filling plugs for electric storage cells
GB2125383A (en) * 1982-07-20 1984-03-07 Lucas Chloride Ev Syst Ltd Device for controlling admission of liquid into a container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1099741A (en) * 1964-04-09 1968-01-17 Electric Power Storage Ltd Topping up devices
GB1516907A (en) * 1975-08-26 1978-07-05 Daimler Benz Ag Batteries
GB2016798A (en) * 1978-03-15 1979-09-26 Chloride Group Ltd Vented filling plugs for electric storage cells
GB2125383A (en) * 1982-07-20 1984-03-07 Lucas Chloride Ev Syst Ltd Device for controlling admission of liquid into a container

Also Published As

Publication number Publication date
GB8609609D0 (en) 1986-05-21

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)