michael at openmoko.org
Thu Aug 21 08:03:42 CEST 2008
Joel Newkirk wrote:
> On Wed, 20 Aug 2008 22:49:05 -0700, Michael Shiloh <michael at openmoko.org>
>> Joel Newkirk wrote:
>>> My guess is that it incorporates some constants that depend on the
>>> 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
>>> and with a bl-5c installed almost all battery-related entries in sysfs
>> 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.
>>> On Thu, 21 Aug 2008 00:13:00 -0400, "Charles Pax"
>> <charles.pax at gmail.com>
>>>> On Wed, Aug 20, 2008 at 11:29 PM, <freerunner at newkirk.us> 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
>>>>> they're in the FR plugged in. But the Freerunner doesn't know what to
>>>>> with them apart from that, presumably since they lack the Openmoko
>>>>> counter circuit.
>>>> The coulomb counter circuitry is in the battery? Why isn't this on the
>>> Openmoko community mailing list
>>> community at lists.openmoko.org
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