I strongly recommend NOT mixing battery types/capacities together, for the following reasons:
1. They won't discharge the same 2. They won't charge the same 3. The weak ones will get weaker quickly 4. The whole pack will get out of whack really fast What voltage are you shooting for? You might want to go ahead and use the Hawkers, and not buddy them up, to get higher voltage. Also, do you have Rudman Regs or some other charging system to keep them from getting overcharged? Mark [EMAIL PROTECTED] > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On > Behalf Of Michael Hoskinson > Sent: Wednesday, August 28, 2002 8:19 PM > To: EV Discussion List > Subject: Parallel strings? > > > Hi everybody. I've been plugging away and the electric D is > just about > ready for field trials (sans body and lights, a field is > about the only > place I'll be able to test it for now). I have a question > about buddy > pairing batteries. I have 16 free Hawker 26 Ah batteries,, and 10 > Panasonic 17Ah, for a 96 volt pack. The Hawkers are used, but the > Panasonics are unused, though 2 years old. I was planning to > buddy-pair > just the Hawkers for my test pack, but I'm wondering if I can > incorporate > the Panasonics too. Would I be condemning them to an early > grave by trying > to use them with their bigger cousins? Could they be used as > a separate > string?, or put into buddy triplets? I could always keep > them for a bike > or scooter. > > I plan to use one of the 17Ah Panasonics for a 12 volt > auxiliary battery, > charged with the DC/DC converter. (Please steer me right if > this is not a > reasonable idea). > > Of course, I'll need a beefier pack for the final product. I > just thought > that I could use the free batteries for cannon fodder while I > get the bugs > out of my conversion. Then I'll have some numbers with which > to assess my > needs. Judging by the way the rest of the project has gone > (I'm sure that > Hofstadter's mother's maiden name was Murphy), I'll probably > start with > half of them hooked up backwards. Talk about yer comedy of errors.... > > Mike Hoskinson > > "I'm a DOCTOR, not an engineer" - Leonard McCoy > >
