I owned a Gen II Prius, I don't think it implements a 3-stage charging algo, but it does appear to at least temperature compensate.
Keep in mind you don't need coulomb counting to implement a proper charge algorithm for lead-acid, just a way to monitor it's current/voltage/temperature. On Wed, Apr 21, 2021 at 8:10 AM Robert Bruninga <bruni...@usna.edu> wrote: > Hummh, > The more I think about it, I really doubt that anything (except maybe > a Tesla) does coulomb counting on its 12v lead-acid battery. Just > parallel it with 14 volts and the design is done. I'm certain that > the Prius for one is simply a floating 14v across the rear mounted Pb > battery. And others have shown the viability of drawing kW from it. > I would happily tabulate the results on the variety of cars if we > could just get the data. > > I know many people have also drawn power from ther Leaf's... > > How can we test? How can we know? > Bob, WB4APR > > On Mon, Apr 19, 2021 at 4:04 PM (-Phil-) <p...@ingineerix.com> wrote: > > > > First off, I'm not very knowledgeable about the Bolt, but modern > vehicles including many ICE vehicles now have 12v charging systems that are > much more complex and many monitor the current (coulomb counting) of the > 12v battery. So if you connect loads directly to the 12v battery, you can > make whatever software is monitoring the charging system believe the 12v > battery is failing. It will see the extra amp hours out and not back in > as a battery with internal loads (sulfation) and could result in warning > lights, or even damage to the 12v battery from overcharge/undercharge. > > > > I know there's quite a few Tesla owners who found out the hard way that > connecting large loads such as inverters to the 12v battery can cause > warranty issues and can be responsible for out-of-pocket costs. > > > > On most EVs, there's going to be some way to derive 12v safely for extra > accessory loads, but I can only comment on Teslas with expertise. > > > > On Mon, Apr 19, 2021 at 10:56 AM Robert Bruninga via EV < > ev@lists.evdl.org> wrote: > >> > >> A front cover article in the National Ham radio magazine promoted the > >> value of the EV for mobile radio operating during > >> drive-everywhere-contesting. But to my surprise, he recommended NOT > >> connecting to the Bolt electrical system due to concerns over dealer > >> warranty issues if anything was connected to the 12v battery. > >> > >> Does anyone here have a Bolt? > >> 1) How many 12V DC outlets are there (2? more?) > >> 2) I assume they are fused at 10 amps like all other "lighters" > >> 3) How accessible is the 12v battery? (A photo would be nice) > >> 4) What kind of fusing does it have? > >> Anything else relative to drawing MANY more amps from the 12v battery.. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210421/683dc006/attachment.html> _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
