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Re: parallel packs?
- Subject: Re: parallel packs?
- From: darrylmcmahon igs net
- Date: Sun, 3 Jan 1999 11:21:35 -0500
- In-reply-to: <199901030215.VAA11964@aldhfn.aldhfn.org>
- References: <004201be36b0$93f36b20$e0f0accf@Maximum.ultranet.com>
- Sender: owner-elec-trak cosmos5 phy tufts edu
Putting in diodes could work - there are automotive battery
isolators for essentially this purpose for RVs - that way both
batteries charge, but the starting battery does not drain when the
accessory battery is used. Don't know if the isolators are rated to
36 volts. Drawback is the voltage drop over the diode, about 0.6
volts which is a few watts at a 100+ amps.
You could also use contactors to put the batteries in parallel only
when desired and leave them isolated otherwise. Unless there is a
bad cell in one of the packs, charging in series should not be a
problem - each pack will take what it needs to get up to charge. I
would recommend golf-cart solenoids, they are rated for continuous
duty - automotive starter solenoids are not. Golf-cart solenoids are
available in both 12-volt and 36-volt coil (actuator) circuit variations.
Darryl McMahon 48 Tarquin Crescent,
It's your planet. Nepean, Ontario K2H 8J8
If you won't look Voice: (613)828-0805
after it, who will? Fax: (613)828-3199