In an aircraft lithium ion battery that can source hundreds of amps there is lots of parallel! And in truth the interior of these batteries looks very different than a conventional one because they all consist of a large number of individual cells (small batteries) wired together series and parallel, instead of a simple series of nominally 2 Volt liquid or gel cells in a conventional 12 Vdc or 28 Vdc battery. Ken Javor Phone: (256) 650-5261
> From: John Woodgate <j...@jmwa.demon.co.uk> > Date: Sun, 10 Mar 2013 16:38:00 +0000 > To: <EMC-PSTC@LISTSERV.IEEE.ORG> > Subject: Re: Immunity and emissions below 150 kHz and lithium batteries > > In message <cd621c49.3e25a%ken.ja...@emccompliance.com>, dated Sun, 10 > Mar 2013, Ken Javor <ken.ja...@emccompliance.com> writes: > >> The battery as such is a just a bunch of cells connected in series and >> parallel; > > Let us hope there is not too much 'parallel', because tiny differences > in cell voltage can result in circulating currents and positive feedback > effects, which can cause the currents to rise to indeterminate > magnitudes. > -- > OOO - Own Opinions Only. See www.jmwa.demon.co.uk > SHOCK HORROR! Dinosaur-like DNA found in chicken and turkey meals > John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <emc-p...@ieee.org> > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://listserv.ieee.org/request/user-guide.html > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <emcp...@radiusnorth.net> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher: <j.bac...@ieee.org> > David Heald: <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
