CA1101930A - Venting device for forming lead-acid battery plates - Google Patents
Venting device for forming lead-acid battery platesInfo
- Publication number
- CA1101930A CA1101930A CA294,948A CA294948A CA1101930A CA 1101930 A CA1101930 A CA 1101930A CA 294948 A CA294948 A CA 294948A CA 1101930 A CA1101930 A CA 1101930A
- Authority
- CA
- Canada
- Prior art keywords
- battery
- acid
- bore
- grids
- plates
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/22—Forming of electrodes
-
- 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
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE.
A device for use in the formation of lead-acid battery plates comprises a hollow, elongated body which at one end is formed with a hole communicating with the bore in the body and is adapted for insertion into the filling and venting aperture of a battery lid.
A closure member is provided at the other end of the body and is formed with an opening to allow gases generated during formation to vent to atmosphere. Moreover, baffle means is provided in the bore in the body so as to lie in the path of the gases flowing through the bore in use and thereby assist in removing acid entrained in said gases.
A device for use in the formation of lead-acid battery plates comprises a hollow, elongated body which at one end is formed with a hole communicating with the bore in the body and is adapted for insertion into the filling and venting aperture of a battery lid.
A closure member is provided at the other end of the body and is formed with an opening to allow gases generated during formation to vent to atmosphere. Moreover, baffle means is provided in the bore in the body so as to lie in the path of the gases flowing through the bore in use and thereby assist in removing acid entrained in said gases.
Description
~1~19~
This invention relates to the formation of lead-acid battery plates.
The formation of lead-acid battery plates involves immersing battery plate grids carrying the required lead-acid battery paste in an aqueous solution of sulphuric acid and then passing an electric current between the grids so as to convert the paste on the grids to the active material of the plates and subsequently charge the plates. In one known method of performing this operation, the grids and the acids are introduced into the battery box which is to define the container of the finished battery and the box is sealed with a battery lid, prior to the passage of the electric current.
This method is partlcularly suited to the production of drained, charged batteries, that is batteries which are drained after forming and then stored with their plates in a moist condition until they are subsequently activated for service. However, this known method suffers from the problem that gases are generated during formation and these can result in the escape of acid, ei.ther as an acid-laden mist or as acid bubbles, through the filling and venting apertures in the lid. This problem is especially pronounded if the forming operation is performed at high temperatures or high current to decrease the formation time. It is therefore an object of the present invention to alleviate and/or minimise this problem.
This invention relates to the formation of lead-acid battery plates.
The formation of lead-acid battery plates involves immersing battery plate grids carrying the required lead-acid battery paste in an aqueous solution of sulphuric acid and then passing an electric current between the grids so as to convert the paste on the grids to the active material of the plates and subsequently charge the plates. In one known method of performing this operation, the grids and the acids are introduced into the battery box which is to define the container of the finished battery and the box is sealed with a battery lid, prior to the passage of the electric current.
This method is partlcularly suited to the production of drained, charged batteries, that is batteries which are drained after forming and then stored with their plates in a moist condition until they are subsequently activated for service. However, this known method suffers from the problem that gases are generated during formation and these can result in the escape of acid, ei.ther as an acid-laden mist or as acid bubbles, through the filling and venting apertures in the lid. This problem is especially pronounded if the forming operation is performed at high temperatures or high current to decrease the formation time. It is therefore an object of the present invention to alleviate and/or minimise this problem.
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``" 1~L~3 93~) According to the present invention there is provided a method of forming battery plates for a lead-acid battery com-prising the steps of assembling at least one pack of battery plate grids and separators into a battery box closed by a lid having at least one filling and venting aperture, said at least one pack including a plurality of grids carrying lead-acid - battery paste required to produce positive battery plates alter- `.
nating with grids respectively carrying lead-acid battery paste ~ :
required to produce negative battery plates and with separators .10 being interposed between adjacent pairs of grids, filling the : -battery box with an aqueous solution of sulphuric acid, inserting into said filling and venting aperture one end of a hollow body which is formed at said one end with at least one opening con-necting the interior of the battery box to the bore in the body, and then passing an electric current through the grids so as to ~`
convert said paste to the active material of the paste and there-: after charge the plates, gases generated by the passage of electric cùrrent flowing through said opening and along the bore in the body over baffle means provided in the body and escaping through an aperture in a closure member at the other end of the body~ acid entrained in said gases being removed by said baffles means and returned to the battery box by way of said opening.~.
~ Preferably, said closure mem~er is in the form of a separate lid closing said other end of the body.
Conveniently, said baffle means is defined at least in part by a portion of said closure member extending into said bore Preferably, said body is formed at or adjacent said one end with at least one longitudinally extending groove com-municating with the bore in the body.
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``" 1~L~3 93~) According to the present invention there is provided a method of forming battery plates for a lead-acid battery com-prising the steps of assembling at least one pack of battery plate grids and separators into a battery box closed by a lid having at least one filling and venting aperture, said at least one pack including a plurality of grids carrying lead-acid - battery paste required to produce positive battery plates alter- `.
nating with grids respectively carrying lead-acid battery paste ~ :
required to produce negative battery plates and with separators .10 being interposed between adjacent pairs of grids, filling the : -battery box with an aqueous solution of sulphuric acid, inserting into said filling and venting aperture one end of a hollow body which is formed at said one end with at least one opening con-necting the interior of the battery box to the bore in the body, and then passing an electric current through the grids so as to ~`
convert said paste to the active material of the paste and there-: after charge the plates, gases generated by the passage of electric cùrrent flowing through said opening and along the bore in the body over baffle means provided in the body and escaping through an aperture in a closure member at the other end of the body~ acid entrained in said gases being removed by said baffles means and returned to the battery box by way of said opening.~.
~ Preferably, said closure mem~er is in the form of a separate lid closing said other end of the body.
Conveniently, said baffle means is defined at least in part by a portion of said closure member extending into said bore Preferably, said body is formed at or adjacent said one end with at least one longitudinally extending groove com-municating with the bore in the body.
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Preferably, -the device includes a plurality of said bodies which are each adapted at said one end for insertion into a respective filling and venting aperture of a battery lid, and which are joined together so that their longitudinal axes extend substantially parallel, and a common removable lid closing the other end of said bodies.
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Preferably, the current is passed at a temperature of at least 150F and is performed in two stages separated by , a standing period of at least 30 minutes.
In the accompanying drawings;
Figures 1 and 2 are sectional views respectively of part of a device according to one e~ample of the invention;
and Figure 3 is a sectional view of the closure member of the device of said one example, Referring to the drawings, the device includes three hollow, generally -tuhular bodies 11 joined by integral webs 12 so that the longitudinal axes of the bodies 11 are parallel.
Each body 11 tapers inwardly towards one end 13 and at its opposite end 14 opens into an enlarged portion 15. The portions 15 together define a common, open trough 16 which is divided by partition walls 17 extending between adjacent pairs respectively of the portions 15. Formed in each partition 17 is a central groove 18 and a pair ofouter grooves 19 located at opposite sides res~ectively o~ the trough 16.
Adjacent the end 1.3, each body 11 is stepped inwardly ~1~193~
, -I to define a tapered narrow portion 21 which at its free end is- ~ partially closed by an integral end wall 22. Formed in each end wall 22 is a centrally disposed hole 23 which communicates with the elonated bore 25 defined by t~e 1 5. respective tubular body 11. Moreover, formed in di~netrically ; I opposite regions of each portion 21 are respective grooves 24 which extend longitudinally from the respective end ~all 23 and also communicate with the as~sociated bore 25.
,' I ,' .
As shown in Figuro 3, the device also includes a cover ! 10. 26 which~ in use, is detachably engaged with the trough 16 to define a common closure member for the bodies 11. The J' ~ cover 26 includes an external wall 27 extending around an ., .,~ , `.~ internal skirt 28 arranged so that, in use, the outer wall of the trough 16 is received as a tight fit between the wall 15. 27 and skirt 28 to aid retention of the cover 26 on the t:rough ~l 16. Depending from the cover Z6 are three tubular projection~
.1 ; ~ 29 each of which extends below the wall 27 and ls di~ided along `, the majority of its length by a pair of di~netrioally o~posite ¦ grooves 31 (only one shown). When the cover 26 is engaged !1 20. with the t~ough 16~ the projections 29 extend into respective ¦ portions 14 of the bodies 11 to define with the partition ~al.l ¢ . 17 baffle means for the gases which~ in use, pas.s through the ;~ bores 25. The cover 26 is also formed with a pair~of venting apertures 32 located between the pairs respectively of ~l 25. acljacent projections 29.
The de~ice described above is intended to assist in the ~i, formation of oattery plates in sit~l; that is l~here the formatiGn .
-: , ,, - :
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occurs in the battery box which is to accom~lodate the fo~ed battery plates. In such a method~ pasted battery plate grids - are first assemblied into packs with separators being interposed between the grids and with each pair of adjacent 5. grids carrying the paste required to prcduce a negati~re battery plate and a positive battery plate respectively. ~he packs are then positioned in the cell compartments defined within the battery box and the required intercell connections are completed through the partition walls dividing the box into the ce]l 10. compartments. The cell compartments are then filled with ~n aqueous solution of sulphuric acid before or after which a battery lid is welded to the open end of the box, the lid being formed in conventional manner with fillin~ and venting ~- apertures communicating with th~ cell compartments respecti~ely~
15. The devic~ described is then engaged with the lid by inserting each portion 21 into a respective filling and venting aperture in the lid~ it bein~ appreciated that for a I normal 8iX cell battery~ two such devices will b~ necessary.
i The tapsr on each portion 21 is arranged so that~ ~hen enga~ed ;;j 20. with the lidl only the free end of the portion 21 extends throug~h ,l' the resp~ctive filling and ~enting aperture into the associated cell comp~rtment of the battery box. Thus each c~ll compartment not only then commurlicates with a respective ~,~ bore 25 by way of the hole 23 and groove 24 in the associated 25. body 11, but also is vented to atmosphere by way o~ the groo~e 24.
.-! lihen the or each device is engaged with the lid~
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, an electric current is passed between the grids in ther ' battery box so as to convert the pa~te onthe grids into the required active mater.ia1 of the plates~and subsequently chargethe plates. Pref~rably~ the passge of the electric `5. current is performed in two stages separate by a period of ` ', standing of at least 30 minutes~ the first stage being '; !
terminated when the charge on the plates is at least 50%~
or more preferably at least goo,b of the required final value.
During passage of the electric current~ gases are ~o, evolved which cause the aci.d solution to bubble vigorously especially if the forming temperature is allowed to rise to~ards the upper end of the preferred forming temp0rature ¦ ¦ range of 150 F to 200 F. These gases are heavily laden . with sulphuric acid~ but before being vented to atmosphere ~ through the apertures 32, must flow through the holes 23 and ; grooves 24~ along the bore3 25 and over the partition walls 17 and projections 29. Thus a large proportion of tho acid is removed prior to the gasos venting to atmospllere, particularly at the baffle means defined by the partltion walls ~, 20. 17 and projections 29, the acid thereby collected then Ij, flowing down the tubes 11 baclc into the battery box.
,) .' !~ Where the forming operat.;.on is performed at high temperatures the bubbling of the acid solution can become so severe as to cover the end walls 23 of the tubes ll~ b~t 25- in thi~ cas0 the bores 25 are still vented to atmopshere !~ through the grooves 24 50 reducing the tendency for the acid ;3 to be drawn up the tubes 11~ If~ however, the bubbllng incr0ases further 50 as to cover th0 entire length of the 93~
grooves 24, it will be seen that the length of the tubes 11 i5 sufficient to accommodate a relatively large amount of acid r.ise before the acid overflows through the apertures 32.
Thus the device clescribed above enables battery plates 5. to be formed in situ at a relatively high temperature, ' that is between 150 - 200 F, without danger to the operating ¦ personnel and without excessive e~lectrolyte loss. Moreover~ the t use of the device descr.ibed prevents particles of carbon black~ which tend to be piel~ed up by the acid vapour from the 10. negative plates~ being deposited on the external walls of the battery. In this way it is possible to avoid the detergent washing step normally necessary with prior art forming l teehniques to remove the carbon black deposits which would otherwise give the battery an unsightly external appearance.
l 1g. In a modification of the dovice clescrlb~d above~ the interior of eaeh body 11 is fl~l.ecl with ~n acid resistant , fibrous packing, such as p.v.e. wool, which provide.s an increased surface area within the bocly for contact with the ~3 aeid vapours f~nd henee improve the acid condensing properties (¦ 20. of the device. As an alternat.ive, a similflr advantageous ;,j effect ean be achieved by provicl:ing a set of baffles in each tubular body l1. In this ease, each set of baffles is ! eonveniently in the form of a plura1ity of semi-eircular pla1;es spaeed along the length of an elongated carrier so thflt 25. adjacont plates extend perpendicular to, but in c;pposite directions respective].y from a plain containing the longitudinal j axis of the carrier and the diameter of each plate~ Each ,,, '''j , . .
; . -, --- j-.--, .. . - :;. ... ,.:.. -, , - - --- - , - carrier is conveniently arranged to locate in one of theprojections 29 formed on the underside of the cover 26 so that, ~, in use, the longitudinal axis of the carrier is co-extensive ' with the axis of the associated body 11. Moreover, the 5. diameters of baffle plates are preferably arranged to vary . in accordance with the taper on their associated body 11 so tha~ each plate engages the internal wall of the bo(~y and, in u9e ~ the acid vapours are constrained by the plates to flow I along a spiral path throùgh the body.
¦ 10. It is to be appreciated that the intercormected bodies 11 : , and the cover 26 will normally be moulded in an acid resistant thermoplastic materia].~ such as polypropylene, .i ,..
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Preferably, -the device includes a plurality of said bodies which are each adapted at said one end for insertion into a respective filling and venting aperture of a battery lid, and which are joined together so that their longitudinal axes extend substantially parallel, and a common removable lid closing the other end of said bodies.
.
.
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Preferably, the current is passed at a temperature of at least 150F and is performed in two stages separated by , a standing period of at least 30 minutes.
In the accompanying drawings;
Figures 1 and 2 are sectional views respectively of part of a device according to one e~ample of the invention;
and Figure 3 is a sectional view of the closure member of the device of said one example, Referring to the drawings, the device includes three hollow, generally -tuhular bodies 11 joined by integral webs 12 so that the longitudinal axes of the bodies 11 are parallel.
Each body 11 tapers inwardly towards one end 13 and at its opposite end 14 opens into an enlarged portion 15. The portions 15 together define a common, open trough 16 which is divided by partition walls 17 extending between adjacent pairs respectively of the portions 15. Formed in each partition 17 is a central groove 18 and a pair ofouter grooves 19 located at opposite sides res~ectively o~ the trough 16.
Adjacent the end 1.3, each body 11 is stepped inwardly ~1~193~
, -I to define a tapered narrow portion 21 which at its free end is- ~ partially closed by an integral end wall 22. Formed in each end wall 22 is a centrally disposed hole 23 which communicates with the elonated bore 25 defined by t~e 1 5. respective tubular body 11. Moreover, formed in di~netrically ; I opposite regions of each portion 21 are respective grooves 24 which extend longitudinally from the respective end ~all 23 and also communicate with the as~sociated bore 25.
,' I ,' .
As shown in Figuro 3, the device also includes a cover ! 10. 26 which~ in use, is detachably engaged with the trough 16 to define a common closure member for the bodies 11. The J' ~ cover 26 includes an external wall 27 extending around an ., .,~ , `.~ internal skirt 28 arranged so that, in use, the outer wall of the trough 16 is received as a tight fit between the wall 15. 27 and skirt 28 to aid retention of the cover 26 on the t:rough ~l 16. Depending from the cover Z6 are three tubular projection~
.1 ; ~ 29 each of which extends below the wall 27 and ls di~ided along `, the majority of its length by a pair of di~netrioally o~posite ¦ grooves 31 (only one shown). When the cover 26 is engaged !1 20. with the t~ough 16~ the projections 29 extend into respective ¦ portions 14 of the bodies 11 to define with the partition ~al.l ¢ . 17 baffle means for the gases which~ in use, pas.s through the ;~ bores 25. The cover 26 is also formed with a pair~of venting apertures 32 located between the pairs respectively of ~l 25. acljacent projections 29.
The de~ice described above is intended to assist in the ~i, formation of oattery plates in sit~l; that is l~here the formatiGn .
-: , ,, - :
i~l93~
occurs in the battery box which is to accom~lodate the fo~ed battery plates. In such a method~ pasted battery plate grids - are first assemblied into packs with separators being interposed between the grids and with each pair of adjacent 5. grids carrying the paste required to prcduce a negati~re battery plate and a positive battery plate respectively. ~he packs are then positioned in the cell compartments defined within the battery box and the required intercell connections are completed through the partition walls dividing the box into the ce]l 10. compartments. The cell compartments are then filled with ~n aqueous solution of sulphuric acid before or after which a battery lid is welded to the open end of the box, the lid being formed in conventional manner with fillin~ and venting ~- apertures communicating with th~ cell compartments respecti~ely~
15. The devic~ described is then engaged with the lid by inserting each portion 21 into a respective filling and venting aperture in the lid~ it bein~ appreciated that for a I normal 8iX cell battery~ two such devices will b~ necessary.
i The tapsr on each portion 21 is arranged so that~ ~hen enga~ed ;;j 20. with the lidl only the free end of the portion 21 extends throug~h ,l' the resp~ctive filling and ~enting aperture into the associated cell comp~rtment of the battery box. Thus each c~ll compartment not only then commurlicates with a respective ~,~ bore 25 by way of the hole 23 and groove 24 in the associated 25. body 11, but also is vented to atmosphere by way o~ the groo~e 24.
.-! lihen the or each device is engaged with the lid~
.;' ',.
; - 7 -' ' ' ' ' ' . ' '~' ''~ `' ~ `
''~' .
193~
, an electric current is passed between the grids in ther ' battery box so as to convert the pa~te onthe grids into the required active mater.ia1 of the plates~and subsequently chargethe plates. Pref~rably~ the passge of the electric `5. current is performed in two stages separate by a period of ` ', standing of at least 30 minutes~ the first stage being '; !
terminated when the charge on the plates is at least 50%~
or more preferably at least goo,b of the required final value.
During passage of the electric current~ gases are ~o, evolved which cause the aci.d solution to bubble vigorously especially if the forming temperature is allowed to rise to~ards the upper end of the preferred forming temp0rature ¦ ¦ range of 150 F to 200 F. These gases are heavily laden . with sulphuric acid~ but before being vented to atmosphere ~ through the apertures 32, must flow through the holes 23 and ; grooves 24~ along the bore3 25 and over the partition walls 17 and projections 29. Thus a large proportion of tho acid is removed prior to the gasos venting to atmospllere, particularly at the baffle means defined by the partltion walls ~, 20. 17 and projections 29, the acid thereby collected then Ij, flowing down the tubes 11 baclc into the battery box.
,) .' !~ Where the forming operat.;.on is performed at high temperatures the bubbling of the acid solution can become so severe as to cover the end walls 23 of the tubes ll~ b~t 25- in thi~ cas0 the bores 25 are still vented to atmopshere !~ through the grooves 24 50 reducing the tendency for the acid ;3 to be drawn up the tubes 11~ If~ however, the bubbllng incr0ases further 50 as to cover th0 entire length of the 93~
grooves 24, it will be seen that the length of the tubes 11 i5 sufficient to accommodate a relatively large amount of acid r.ise before the acid overflows through the apertures 32.
Thus the device clescribed above enables battery plates 5. to be formed in situ at a relatively high temperature, ' that is between 150 - 200 F, without danger to the operating ¦ personnel and without excessive e~lectrolyte loss. Moreover~ the t use of the device descr.ibed prevents particles of carbon black~ which tend to be piel~ed up by the acid vapour from the 10. negative plates~ being deposited on the external walls of the battery. In this way it is possible to avoid the detergent washing step normally necessary with prior art forming l teehniques to remove the carbon black deposits which would otherwise give the battery an unsightly external appearance.
l 1g. In a modification of the dovice clescrlb~d above~ the interior of eaeh body 11 is fl~l.ecl with ~n acid resistant , fibrous packing, such as p.v.e. wool, which provide.s an increased surface area within the bocly for contact with the ~3 aeid vapours f~nd henee improve the acid condensing properties (¦ 20. of the device. As an alternat.ive, a similflr advantageous ;,j effect ean be achieved by provicl:ing a set of baffles in each tubular body l1. In this ease, each set of baffles is ! eonveniently in the form of a plura1ity of semi-eircular pla1;es spaeed along the length of an elongated carrier so thflt 25. adjacont plates extend perpendicular to, but in c;pposite directions respective].y from a plain containing the longitudinal j axis of the carrier and the diameter of each plate~ Each ,,, '''j , . .
; . -, --- j-.--, .. . - :;. ... ,.:.. -, , - - --- - , - carrier is conveniently arranged to locate in one of theprojections 29 formed on the underside of the cover 26 so that, ~, in use, the longitudinal axis of the carrier is co-extensive ' with the axis of the associated body 11. Moreover, the 5. diameters of baffle plates are preferably arranged to vary . in accordance with the taper on their associated body 11 so tha~ each plate engages the internal wall of the bo(~y and, in u9e ~ the acid vapours are constrained by the plates to flow I along a spiral path throùgh the body.
¦ 10. It is to be appreciated that the intercormected bodies 11 : , and the cover 26 will normally be moulded in an acid resistant thermoplastic materia].~ such as polypropylene, .i ,..
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Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A method of forming battery plates for a lead-acid battery comprising the steps of assembling at least one pack of battery plate grids and separators into a battery box closed by a lid having at least one filling and venting aper-ture, said at least one pack including a plurality of grids carrying lead-acid battery paste required to produce positive battery plates alternating with grids respectively carrying lead-acid battery paste required to produce negative battery plates and with separators being interposed between adjacent pairs of grids, filling the battery box with an aqueous solu-tion of sulphuric acid, inserting into said filling and venting aperture one end of a hollow body which is formed at said one end with at least one opening connecting the interior of the battery box to the bore in the body, and then passing an elec-tric current through the grids so as to convert said paste to the active material of the paste and thereafter charge the plates, gases generated by the passage of electric current flowing through said opening and along the bore in the body over baffle means provided in the body and escaping through an aper-ture in a closure member at the other end of the body, acid entrained in said gases being removed by said baffles means and returned to the battery box by way of said opening.
2. A method as claimed in claim 1 wherein said at least one opening in the body is defined by a longitudinally extending slot formed in the side wall of the body at said one end thereof or by an axial hole in said one said slot and said hole end of the body or both.
3. A method as claimed in claim 1, wherein said closure member is in the form of a separate lid closing said other end of the body.
4. A method as claimed in claim 1, 2 or 3 wherein said baffle means is defined at least in part by a portion of said closure member extending into said bore.
5. A method as claimed in claim 1, 2 or 3 wherein said baffle means includes an acid-resistant fibrous packing mounted in the bore in the body.
6. A method as claimed in claim 1, 2 or 3 wherein said baffle means includes a plurality of baffle plates spaced along the length of the bore in the body.
7. A method as claimed in claim 1, 2 or 3 in which a plurality of said bodies are inserted at said one end into a respective filling and venting aperture of a battery lid, said bodies being joined together so that their longitudinal axes extend substantially parallel and having a common movable lid closing the other end of said bodies.
8. A method as claimed in claim 1, 2 or 3 wherein the current is passed at a temperatures of at least 150°F and is performed in two stages separated by a standing period of at least 30 minutes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1657/77A GB1599755A (en) | 1977-01-15 | 1977-01-15 | Formation of lead-acid battery plates |
| GB1657/77 | 1977-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1101930A true CA1101930A (en) | 1981-05-26 |
Family
ID=9725777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA294,948A Expired CA1101930A (en) | 1977-01-15 | 1978-01-13 | Venting device for forming lead-acid battery plates |
Country Status (17)
| Country | Link |
|---|---|
| JP (1) | JPS53111438A (en) |
| AT (1) | AT362001B (en) |
| AU (1) | AU518207B2 (en) |
| BE (1) | BE862895A (en) |
| BR (1) | BR7800221A (en) |
| CA (1) | CA1101930A (en) |
| DE (1) | DE2801629A1 (en) |
| DK (1) | DK16578A (en) |
| ES (1) | ES466047A1 (en) |
| FR (1) | FR2393435A1 (en) |
| GB (1) | GB1599755A (en) |
| IT (1) | IT1091845B (en) |
| LU (1) | LU78867A1 (en) |
| NL (1) | NL7800418A (en) |
| NZ (1) | NZ186221A (en) |
| SE (1) | SE7800451L (en) |
| ZA (1) | ZA78131B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1594607A (en) * | 1977-01-20 | 1981-08-05 | Lucas Industries Ltd | Lead-acid batteries |
| US6143438A (en) * | 1998-02-24 | 2000-11-07 | Johnson Controls Technology Co. | Cold flow sealing vent |
| DE50012351D1 (en) | 2000-11-29 | 2006-05-04 | Vb Autobatterie Gmbh & Co Kgaa | Sealing plug arrangement for accumulators |
| DE102005017442B4 (en) | 2005-04-15 | 2007-11-29 | Vb Autobatterie Gmbh & Co. Kgaa | Accumulator and lid on this |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191400123A (en) * | 1913-01-16 | 1915-01-04 | Svenska Ackumulator Ab | Improvements relating to Electric Accumulator Cells. |
| GB580214A (en) * | 1944-06-19 | 1946-08-30 | Mark Zukowski | Improvements relating to apparatus for removing gases in battery-charging installations |
| FR2208195B2 (en) * | 1970-10-16 | 1976-08-20 | Europ Accumulateurs | |
| US4066825A (en) * | 1973-05-25 | 1978-01-03 | General Battery Corporation | System and method for protecting the environment in a battery production room |
| FR2314586A1 (en) * | 1975-06-09 | 1977-01-07 | Lucas Batteries Ltd | Lead-acid battery plates prodn. for dry storage - without quality loss by leaving in acid soln. between initial and final forming stages |
-
1977
- 1977-01-15 GB GB1657/77A patent/GB1599755A/en not_active Expired
-
1978
- 1978-01-09 ZA ZA00780131A patent/ZA78131B/en unknown
- 1978-01-11 AU AU32346/78A patent/AU518207B2/en not_active Expired
- 1978-01-13 IT IT19240/78A patent/IT1091845B/en active
- 1978-01-13 CA CA294,948A patent/CA1101930A/en not_active Expired
- 1978-01-13 FR FR7800994A patent/FR2393435A1/en active Granted
- 1978-01-13 NZ NZ186221A patent/NZ186221A/en unknown
- 1978-01-13 LU LU78867A patent/LU78867A1/en unknown
- 1978-01-13 BR BR7800221A patent/BR7800221A/en unknown
- 1978-01-13 DK DK16578A patent/DK16578A/en unknown
- 1978-01-13 BE BE184307A patent/BE862895A/en unknown
- 1978-01-13 NL NL7800418A patent/NL7800418A/en not_active Application Discontinuation
- 1978-01-14 DE DE19782801629 patent/DE2801629A1/en not_active Withdrawn
- 1978-01-16 ES ES466047A patent/ES466047A1/en not_active Expired
- 1978-01-16 AT AT30278A patent/AT362001B/en not_active IP Right Cessation
- 1978-01-16 SE SE7800451A patent/SE7800451L/en unknown
- 1978-01-17 JP JP287078A patent/JPS53111438A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| SE7800451L (en) | 1978-07-16 |
| BR7800221A (en) | 1978-09-05 |
| FR2393435B1 (en) | 1980-08-22 |
| ZA78131B (en) | 1978-11-29 |
| FR2393435A1 (en) | 1978-12-29 |
| DK16578A (en) | 1978-07-16 |
| LU78867A1 (en) | 1978-06-26 |
| DE2801629A1 (en) | 1978-07-27 |
| GB1599755A (en) | 1981-10-07 |
| ATA30278A (en) | 1980-09-15 |
| AU3234678A (en) | 1979-07-19 |
| BE862895A (en) | 1978-05-02 |
| AU518207B2 (en) | 1981-09-17 |
| IT1091845B (en) | 1985-07-06 |
| AT362001B (en) | 1981-04-27 |
| NZ186221A (en) | 1981-04-24 |
| JPS53111438A (en) | 1978-09-29 |
| NL7800418A (en) | 1978-07-18 |
| ES466047A1 (en) | 1978-10-01 |
| IT7819240A0 (en) | 1978-01-13 |
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Legal Events
| Date | Code | Title | Description |
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| MKEX | Expiry |