Broken battery protection circuit (was: Re: Battery driver problems?)
Tobias Diedrich wrote: Apparently it wasn't charged at all? (Voltage 3,324 Volts)o I think I'll try going back to the http://downloads.openmoko.org/releases/Freerunner/ image... That didn't help. Looking at the battery circuit schematics I now think that the battery protection circuit on this battery is probably broken. Discharging is still possible (now at 2.8V at the terminals), but it does not accept any charge (I tried current-limited 4.2V/200mA at the battery terminals and there is (almost, a few uA) no current flow). -- Tobias PGP: http://9ac7e0bc.uguu.de このメールは十割再利用されたビットで作られています。 ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Broken battery protection circuit (was: Re: Battery driver problems?)
Tobias Diedrich wrote: That didn't help. Looking at the battery circuit schematics I now think that the battery protection circuit on this battery is probably broken. Discharging is still possible (now at 2.8V at the terminals), but it does not accept any charge (I tried current-limited 4.2V/200mA at the battery terminals and there is (almost, a few uA) no current flow). FWIW, I couldn't find the datasheet at the openmoko site, but this is the overdischarge/overcharge protection circuit datasheet: http://dl.sii-ic.com.edgesuite.net/spd_dtst/dt_sht_e/lithium/S8211C_E.pdf -- Tobias PGP: http://9ac7e0bc.uguu.de このメールは十割再利用されたビットで作られています。 ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: Battery driver problems?
Tobias Diedrich wrote: /sys/devices/platform/bq27000-battery.0/power_supply/bat says: capacity: 0 charge_full: 1223082 current_now: 2437 present: 1 status: Discharging technology: Li-ion temp: 346 time_to_empty_now: 0 time_to_full_now: 3932100 type: Battery voltage_now: 3778000 Now, after it was connected to the charger the whole night it says: POWER_SUPPLY_NAME=bat POWER_SUPPLY_TYPE=Battery POWER_SUPPLY_STATUS=Not charging POWER_SUPPLY_VOLTAGE_NOW=3324000 POWER_SUPPLY_CURRENT_NOW=0 POWER_SUPPLY_CHARGE_FULL=1223082 POWER_SUPPLY_TEMP=318 POWER_SUPPLY_TECHNOLOGY=Li-ion POWER_SUPPLY_PRESENT=1 POWER_SUPPLY_TIME_TO_EMPTY_NOW=3932100 POWER_SUPPLY_TIME_TO_FULL_NOW=3932100 POWER_SUPPLY_CAPACITY=0 Apparently it wasn't charged at all? (Voltage 3,324 Volts)o I think I'll try going back to the http://downloads.openmoko.org/releases/Freerunner/ image... -- Tobias PGP: http://9ac7e0bc.uguu.de このメールは十割再利用されたビットで作られています。 ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
