Battery ID chip - help needed

Paul Fertser fercerpav at
Thu Jun 11 08:59:32 CEST 2009

Werner Almesberger <werner at> writes:
> Paul Fertser and Joerg have done some investigation on the factory
> settings of the bq27000, so they may have suggestions for a better
> configuration.

Yeah, the main suggestion being "don't forget to actually configure
it!" :)

Reconfiguration after the pack is out of the factory is hard because
it needs 21V on PROG pin, so the right thing should be done from the

For that one needs to carefully look at all accessible documentation
for particular cells and then fill bq27000 eeprom accordingly. The
datasheet is quite clear about what is expected to be there and proper
programming will bring more accurate measurements and therefore
improve user experience :)

Be free, use free ( software!
mailto:fercerpav at

More information about the community mailing list