Joel Newkirk wrote: > On Wed, 20 Aug 2008 22:49:05 -0700, Michael Shiloh <[EMAIL PROTECTED]> > wrote: >> >> Joel Newkirk wrote: >>> My guess is that it incorporates some constants that depend on the >> actual >>> battery pack. Note that I don't actually KNOW that it's in the battery, >>> but previous ML posts by folks at Openmoko refer to it as 'in the >> battery', >>> and with a bl-5c installed almost all battery-related entries in sysfs >> are >>> unpopulated. >> This is to confirm that the coulomb counter is in the battery pack. Why? >> Because it stores the count, and if you swap batteries, you need to know >> the count for the battery in the device, not for the one you removed. > > Makes perfect sense. Is it a custom IC, something off-the-shelf, or what?
That I don't know. Joerg, any reason we don't open source this schematic, since we did all of GTA02? > Could it be cheaply retrofitted by a hobbyist into a BL-5c clone battery? There is the space issue of course. > I'm quite happy to crack one open, just not my Openmoko battery... ;) > > Barring the workability of that idea, I'm hoping we can adapt the battery > management/monitoring software to fallback to the 'dumb cellphone' approach > and let us safely charge, and have some idea of remaining capacity of, > non-Openmoko batteries if it detects a battery present without the coulomb > counter circuit. Yes, this should be done in any case, so that a "dumb" battery can always be used. > > j > >>> j >>> >>> On Thu, 21 Aug 2008 00:13:00 -0400, "Charles Pax" >> <[EMAIL PROTECTED]> >>> wrote: >>>> On Wed, Aug 20, 2008 at 11:29 PM, <[EMAIL PROTECTED]> wrote: >>>> >>>>> OK, I have a few Nokia batteries laying around, BL-5c and BL-6c, and >>>>> desktop chargers. They power the Freerunner fine, and seem to charge >>>> when >>>>> they're in the FR plugged in. But the Freerunner doesn't know what to >>>> do >>>>> with them apart from that, presumably since they lack the Openmoko >>>> coulomb >>>>> counter circuit. >>>> The coulomb counter circuitry is in the battery? Why isn't this on the >>>> board >>>> itself? >>>> >>>> -Charles >>> >>> _______________________________________________ >>> Openmoko community mailing list >>> community@lists.openmoko.org >>> http://lists.openmoko.org/mailman/listinfo/community >> _______________________________________________ >> Openmoko community mailing list >> community@lists.openmoko.org >> http://lists.openmoko.org/mailman/listinfo/community > > > _______________________________________________ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community