Article View: sci.electronics.design
Article #2375Re: Li-ion camcorder battery with fuel gauging that is not patented or secret
From: Ban
Date: Tue, 27 Aug 2002 11:15
Date: Tue, 27 Aug 2002 11:15
29 lines
2224 bytes
2224 bytes
"wombat" <wombat@spppaaammmflashmail.com> schrieb im Newsbeitrag news:3D6B3FA9.2010309@spppaaammmflashmail.com... > Hi all, > I'm sure someone has done this before... that is build some portable > equipment and used a camcorder battery as the power source.... > > My problem is finding one that has built-in fuel gauging and a publicly > available communication protocol. I have seen infoLITHIUM packs but the > communication specs are kept secret by sony. > > Any suggestions? > > Cheers, > wombat > A Lithium battery would be the best, as the voltage when full is about 4.2V and the empty battery has 2.8V. the middle region (10% to 90% State-Of Charge) is quite linear as well. If there is a large current to the load, it will be incorrectly showing too little capacity. NiCd or NiMH are not so easy to sense, you will need to measure the output current and integrate over the time to sense the used mAh. Voltage doesn't give a good estimate here. -- ciao Ban electronic hardware designer http://thinkamove.com/
Technical Details
Message-ID:
<%aJa9.25566$pX1.734920@news2.tin.it>Path:
arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news.ems.psu.edu!news.cis.ohio-state.edu!news.maxwell.syr.edu!nntp.infostrada.it!news-out.tin.it!news-in.tin.it!news2.tin.it.POSTED!not-for-mailReferences:
<3D6B3FA9.2010309@spppaaammmflashmail.com>Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 112d1e,7bb90793d439bb27 X-Google-Attributes: gid112d1e,public X-Google-Thread: 103407,7bb90793d439bb27 X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2002-08-27 04:15:13 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news.ems.psu.edu!news.cis.ohio-state.edu!news.maxwell.syr.edu!nntp.infostrada.it!news-out.tin.it!news-in.tin.it!news2.tin.it.POSTED!not-for-mail From: "Ban" <bansuri@masterweb.it> Newsgroups: sci.electronics.design,aus.electronics References: <3D6B3FA9.2010309@spppaaammmflashmail.com> Subject: Re: Li-ion camcorder battery with fuel gauging that is not patented or secret Lines: 32 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Message-ID: <%aJa9.25566$pX1.734920@news2.tin.it> Date: Tue, 27 Aug 2002 11:15:07 GMT NNTP-Posting-Host: 80.116.46.174 X-Complaints-To: newsmaster@tin.it X-Trace: news2.tin.it 1030446907 80.116.46.174 (Tue, 27 Aug 2002 13:15:07 MET DST) NNTP-Posting-Date: Tue, 27 Aug 2002 13:15:07 MET DST Organization: TIN