Hey Shawn, it is so much easier to understand when you have a visual to look at. Am I correct in thinking more amps give you range whereas volts gives you the power, and wattage is the demand? And when designing a battery pack, you don't necessarily have to have all the batteries in parallel or series. You may have a motor that can only handle 120 volts but you want to increase the range so you add those additional batteries in parallel so as not to increase the volts? Do DC motors have a wattage requirement like a microwave, TV or a handheld appliance? Anton ----- Original Message ----- From: Shawn Waggoner (FLEAA)<mailto:[EMAIL PROTECTED]> To: 'FLEAA Mailing List'<mailto:[email protected]> Sent: Tuesday, January 15, 2008 8:46 AM Subject: Re: [FLEAA] listserv Digest, Vol 6, Issue 17
Scott and all, On batteries and capacity, voltage is additive in a series configuration, but capacity is constant. Voltage is constant in parallel, but the capacity is additive. Here are a couple of quick diagrams I worked up to show the difference: The first is a series circuit and you can see that the voltage is additive but the pack is still only 50Ah. The second one has the batteries in parallel so you only have a 12V pack, but the capacity is increased. If combine the 2 concepts into a series-parallel configuration, like below, you get a higher voltage and increased capacity. I also found a good battery primer on Intersil's site: http://www.intersil.com/data/an/an126.pdf Hope this was helpful, Shawn ------------------------------------------------------------------------------ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Scott Kuzma Sent: Monday, January 14, 2008 11:41 PM To: [email protected] Subject: Re: [FLEAA] listserv Digest, Vol 6, Issue 17 Shawn, Perhaps I am misunderstanding something about how the amperage totals up. If you had 1440 cells in parallel or 1440 in serial, although you would get a different voltage you would get the same amp total...or am I wrong about that? Until the idea of the needing diodes for proper discharging and recharging, (which I still need more information on, such as needing them between each cell or each pack), I was intending to simply use a cylindrical pack with all top and bottom terminals of the batteries exposed so that I could stack and lock together each pack without needing such excessive wiring. Am I still too far out of the box? ;) ~Best, Scott Kuzma _______________________________________________ Florida EAA mailing list [email protected] http://www.floridaeaa.org
<<image002.gif>>
<<image006.gif>>
_______________________________________________ Florida EAA mailing list [email protected] http://www.floridaeaa.org
