Home |
Search |
Today's Posts |
|
Electronic Schematics (alt.binaries.schematics.electronic) A place to show and share your electronics schematic drawings. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
REQ: Schematic for Battery Desulphator ... TIA
~
|
#2
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
"Alice" wrote in message
... The first two Google hits on battery desulphator schematic: http://www.rst-engr.com/kitplanes/KP0204/KP0204.htm http://www.geocities.com/Yosemite/23..._tips/e04.html You're welcome -- Dave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Experience: What you get when you don't get what you want |
#3
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
"Alice" wrote in message ... ~ Yuasa publish a "Little red battery book" which recommends supplying a sulphated battery with 29V current limited to 1/3 of the Ah capacity, assuming the sulphation starts to break down the terminal voltage will pull down to the deep discharge value ( about 10.8V for a 12V battery) A comparator should be arranged to detect this event and switch the charger over to constant voltage charging (about 13.8 to 14.4V). |
#4
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
ian field wrote:
Yuasa publish a "Little red battery book" which recommends supplying a sulphated battery with 29V current limited to 1/3 of the Ah capacity, assuming the sulphation starts to break down the terminal voltage will pull down to the deep discharge value ( about 10.8V for a 12V battery) A comparator should be arranged to detect this event and switch the charger over to constant voltage charging (about 13.8 to 14.4V). Down loadable in PDF form at: http://www.yuasa-battery.co.uk/indus...downloads.html -- Regards, John Popelish |
#5
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
"John Popelish" wrote in message . .. ian field wrote: Yuasa publish a "Little red battery book" which recommends supplying a sulphated battery with 29V current limited to 1/3 of the Ah capacity, assuming the sulphation starts to break down the terminal voltage will pull down to the deep discharge value ( about 10.8V for a 12V battery) A comparator should be arranged to detect this event and switch the charger over to constant voltage charging (about 13.8 to 14.4V). Down loadable in PDF form at: http://www.yuasa-battery.co.uk/indus...downloads.html I'll refer to this booklet the next time my milkfloat lets me down. :-) Mike |
#6
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
I didn't see these numbers (29 volts & 1/3 Ah) anywhere in this book. WHere
did I miss them? Jim -- "It is the mark of an educated mind to be able to entertain a thought without accepting it." --Aristotle "John Popelish" wrote in message . .. ian field wrote: Yuasa publish a "Little red battery book" which recommends supplying a sulphated battery with 29V current limited to 1/3 of the Ah capacity, assuming the sulphation starts to break down the terminal voltage will pull down to the deep discharge value ( about 10.8V for a 12V battery) A comparator should be arranged to detect this event and switch the charger over to constant voltage charging (about 13.8 to 14.4V). Down loadable in PDF form at: http://www.yuasa-battery.co.uk/indus...downloads.html -- Regards, John Popelish |
#7
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
"RST Engineering (jw)" wrote in message m... I didn't see these numbers (29 volts & 1/3 Ah) anywhere in this book. WHere did I miss them? IIRC they were in the real paper book Yuasa sent me many years ago - maybe the values have been revised since. |
#8
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
On Fri, 01 Aug 2008 11:58:05 -0400, John Popelish
wrote: ian field wrote: Yuasa publish a "Little red battery book" which recommends supplying a sulphated battery with 29V current limited to 1/3 of the Ah capacity, assuming the sulphation starts to break down the terminal voltage will pull down to the deep discharge value ( about 10.8V for a 12V battery) A comparator should be arranged to detect this event and switch the charger over to constant voltage charging (about 13.8 to 14.4V). Down loadable in PDF form at: http://www.yuasa-battery.co.uk/indus...downloads.html The 29 volts is a standard level from a 24 volt battery charger, and reality they were saying, use a constant current supply. They now seem to have changed to 1/10 of the amp-hour capacity, and not 1/3 . Their present recommendation reads:- Depending on the degree of sulphation, a battery may be recovered from this condition by constant current charging at a higher voltage with the current limited to one tenth of the battery capacity for a maximum of 12 hours. Note: The applied voltage will exceed the normal recommendation and so the battery must be monitored (not left unattended) and removed from charge if excess heat is dissipated. The voltage required to “force” this maximum current into the battery will reduce as the battery recovers until normal charging can take place. In extreme circumstances a battery may never fully recover from sulphation and must therefore be replaced. Peter |
#9
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
"Peter Dettmann" wrote in message ... On Fri, 01 Aug 2008 11:58:05 -0400, John Popelish wrote: ian field wrote: Yuasa publish a "Little red battery book" which recommends supplying a sulphated battery with 29V current limited to 1/3 of the Ah capacity, assuming the sulphation starts to break down the terminal voltage will pull down to the deep discharge value ( about 10.8V for a 12V battery) A comparator should be arranged to detect this event and switch the charger over to constant voltage charging (about 13.8 to 14.4V). Down loadable in PDF form at: http://www.yuasa-battery.co.uk/indus...downloads.html The 29 volts is a standard level from a 24 volt battery charger, and reality they were saying, use a constant current supply. They now seem to have changed to 1/10 of the amp-hour capacity, and not 1/3 . Their present recommendation reads:- Depending on the degree of sulphation, a battery may be recovered from this condition by constant current charging at a higher voltage with the current limited to one tenth of the battery capacity for a maximum of 12 hours. Note: The applied voltage will exceed the normal recommendation and so the battery must be monitored (not left unattended) and removed from charge if excess heat is dissipated. The voltage required to "force" this maximum current into the battery will reduce as the battery recovers until normal charging can take place. In extreme circumstances a battery may never fully recover from sulphation and must therefore be replaced. Peter The book Yuasa sent me many years ago answered just about every question except the one I'd asked them. Someone told me that if you soldered to lead battery terminal posts the tin in the solder migrated through the lead and poisoned the plates, I had been experimenting with methods of recovering sulphated batteries and often soldered to the terminal posts - all of the batteries got worse not better, many equipment manufacturers solder to the spade terminals on SLAs but I couldn't even find any recommendations on that. |
#10
Posted to alt.binaries.schematics.electronic
|
|||
|
|||
Schematic for Battery Desulphator ... TIA
ian field wrote:
"Peter Dettmann" wrote in message ... On Fri, 01 Aug 2008 11:58:05 -0400, John Popelish wrote: ian field wrote: Yuasa publish a "Little red battery book" which recommends supplying a sulphated battery with 29V current limited to 1/3 of the Ah capacity, assuming the sulphation starts to break down the terminal voltage will pull down to the deep discharge value ( about 10.8V for a 12V battery) A comparator should be arranged to detect this event and switch the charger over to constant voltage charging (about 13.8 to 14.4V). Down loadable in PDF form at: http://www.yuasa-battery.co.uk/indus...downloads.html The 29 volts is a standard level from a 24 volt battery charger, and reality they were saying, use a constant current supply. They now seem to have changed to 1/10 of the amp-hour capacity, and not 1/3 . Their present recommendation reads:- Depending on the degree of sulphation, a battery may be recovered from this condition by constant current charging at a higher voltage with the current limited to one tenth of the battery capacity for a maximum of 12 hours. Note: The applied voltage will exceed the normal recommendation and so the battery must be monitored (not left unattended) and removed from charge if excess heat is dissipated. The voltage required to "force" this maximum current into the battery will reduce as the battery recovers until normal charging can take place. In extreme circumstances a battery may never fully recover from sulphation and must therefore be replaced. Peter The book Yuasa sent me many years ago answered just about every question except the one I'd asked them. Someone told me that if you soldered to lead battery terminal posts the tin in the solder migrated through the lead and poisoned the plates, I had been experimenting with methods of recovering sulphated batteries and often soldered to the terminal posts - all of the batteries got worse not better, many equipment manufacturers solder to the spade terminals on SLAs but I couldn't even find any recommendations on that. I'd be most surprised if tin could diffuse through lead at normal temperatures in the timescale implied by your remark. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Seeking schematic for Sears 10/2/50 amp battery charger/starter | Electronics Repair | |||
Schematic for Sears 10/2/50 amp Battery charger/starter | Electronic Schematics | |||
Lead acid battery desulfator / desulphator circuit query. | Electronics | |||
Trouble with aftermarket battery charger: Need schematic | Electronics Repair | |||
S.P.E. Battery charger schematic | Electronics Repair |