Date: Thu, 21 Feb 2002 10:02:11 +0800 From: Raymond <[EMAIL PROTECTED]> Subject: Re: [LIB] Re: Lib batteries
At 08:41 AM 20/02/2002 -0800, you wrote: >Date: Wed, 20 Feb 2002 10:35:34 -0600 >From: [EMAIL PROTECTED] >Subject: Re: [LIB] Re: Lib batteries > >On 20 Feb 2002 at 5:31, [EMAIL PROTECTED] wrote: > >> series while the high cap has 3 pairs of cells in series. Kind of odd, since >> I thought that one should not put voltage sources in series. I will study >> the wiring closer. > >In parallel. Its not recommended batteries are put in parallel. Actually that is a >hold >over from AC. Its difficult to put ac sources like transformers in parallel because >they have to be very closely matched. With most dc sources its safe to do. Actually, I thought there were more smarts in the battery than this (as I understand it, there's an entire controller circuit board). Its quite safe to put DC sources in parallel, even unmatched ones, as long as you link them with back to back diodes so one set won't reverse charge the other ... all that'll happen then is if one is higher than the other only the higher one will drain until they're level then both will drain together. Charging will require other (relatively trivial) circuitry to bypass this. Certainly thats how many redundant battery systems work (where you have 2 or more batteries so you can swap batteries without killing power). I've not opened the battery pack but it'd severely surprise me if the cells were in pure series-parallel or parallel-series ... - Raymond --- /~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\ | | "Does fuzzy logic tickle?" | | ___ | "My HDD has no reverse. How do I backup?" | | /__/ +-------------------------------------------| | / \ a y b o t | [EMAIL PROTECTED] | | | HTTP://www.raybot.net | | ICQ: 31756092 | Need help? Visit #Windows98 on DALNet! | \~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~/ ************************************************************** http://libretto.basiclink.com - Libretto mailing list http://libretto.basiclink.com/archive - Archives http://www.picante.com/~gtaylor/portable/faq.html - FAQ -------TO UNSUBSCRIBE------- Reply to any of the list messages. The reply mail should be addressed to: [EMAIL PROTECTED] - Then replace any text on the message's subject line: cmd:unsubscribe --------TO UNSUBSCRIBE DIGEST------ Do above but with this on subject line: cmd:unsubscribe digest **************************************************************
