automobile battery series-parallel question
automobile battery series-parallel question
(OP)
I'm new to this forum, so apologies if question is in wrong arena or format.
I am designing a 6 volt dc battery system that would deliver current to a 6 volt system, and would like to tap it for occasional or light service for 12v dc. I would like to use 2 parallel-connected 6v batteries for their current capacity during normal 6 volt use, and use diode protected connections (or some such device) to attach a series circuit that provides 12 volts from the same two 6v batteries for light or limited use.
Charging would be 6 volts to the batteries during use. I'm not a sparky, so would appreciate advice as to feasability of this, and if commercial units are available.
Thanks for all advice,
geesqd
I am designing a 6 volt dc battery system that would deliver current to a 6 volt system, and would like to tap it for occasional or light service for 12v dc. I would like to use 2 parallel-connected 6v batteries for their current capacity during normal 6 volt use, and use diode protected connections (or some such device) to attach a series circuit that provides 12 volts from the same two 6v batteries for light or limited use.
Charging would be 6 volts to the batteries during use. I'm not a sparky, so would appreciate advice as to feasability of this, and if commercial units are available.
Thanks for all advice,
geesqd





RE: automobile battery series-parallel question
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: automobile battery series-parallel question
rmw
RE: automobile battery series-parallel question
Try a Google search. It takes time, true. All that you need is there cause I've BTDT.
A few years ago I installed a 12v battery (actually TWO 6v in the same case) that had a solenoid to put both sides of the batt together to shoot 12v to the starter yet still maintain the stock 1937 Buick charging system and all the 6v lights and ancillaries. Was not cheap, but it did the job for many years. I sold that car so I no longer have any documents....Sorry, it's your turn,
Rod
RE: automobile battery series-parallel question
Beware of flash-over between the relay contacts during switching if the ratings are not adequate.
This is more or less what the series parallel switch on the 12/24 volt truck engines did. It was optimized for starting current on one contact and charging on the other contact.
I would normally echo the Google comments, but I have found older technology is not always well represented on the WWW.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: automobile battery series-parallel question
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: automobile battery series-parallel question
DC-DC converters are pretty common in electronics nowadays, don't know if you can find one in convenient size/ratings.
But, that would allow a single 6v battery, much simpler and lighter. Actually, savings of only one battery might pay for the DC converter.
regards
Jay
Jay Maechtlen
http://www.laserpubs.com/techcomm