BQ34Z100EVM: Update status not updated from 05 to 06

Tomoya

Part Number: BQ34Z100EVM
Other Parts Discussed in Thread: BQ34Z100,

BQ34Z100: Update status not updated from 05 to 06

Hi, team

update state is successfully updated from 04->05 but not from 05->06.

I am attaching the log file.
Charging and discharging has been repeated for 3 cycles but did not give the desired result.
'OCVTAKEN' changed to High and the charging and discharging process proceeded. I verified that the 'QEN' bit was High at all steps.
Could you give me some advice ?

- Board BQ34Z100EVM
- Chemistry ID 2085
- 2 cells, seriesed

Best regards

6177.log.zip

over 1 year ago

0 Adrian over 1 year ago

TI__Mastermind 37761 points

Hey Tomoya,

Can you send me the datasheet for the battery you are using? Can you also send me the gg file from the gauge?

Regards,

Nick Richards

0 Tomoya over 1 year ago in reply to Adrian

Prodigy 132 points

Hey Nick

Please find file attached.

Regards,

Tomoya

INR18650-30Q.gg.csv

INR18650-30Q_datasheet.PDF

0 Adrian over 1 year ago in reply to Tomoya

TI__Mastermind 37761 points

Hey Tomoya,

I see 2 problems. One there is not a constant current discharge. The current during the end of the discharge jumps from -600 mA to -1130 mA, This should be constant at -600 mA throughout the entire discharge.

The second problem I see is that you are over discharging the battery. I'm seeing the voltage drop all the way down to 4664 mV. The terminate voltage is set at 5000 mV.

Address these concerns and rerun that part of the learning cycle.

Regards,

Nick Richards

0 Tomoya over 1 year ago in reply to Adrian

Prodigy 132 points

Hey Nick

Thank you for your message. I will retry the learning cycle based on your points.

Regards,

Tomoya

0 Adrian over 1 year ago in reply to Tomoya

TI__Mastermind 37761 points

Hey Tomoya,

Sounds good. Update me if this fixes your issue or not.

Regards,

Nick Richards

0 Tomoya over 1 year ago in reply to Adrian

Prodigy 132 points

Hey Nick,
'update status' was updated from 05 to 06.

However some issues remain. I will retry the learning cycle with a new battery pack and create another thread if necessary.
- The discharge current increases near the termination voltage. 600mA (C/5) -> 1130mA.
- SOC decreases quickly. at C/5 discharge, SOC decreases slowly and reaches 0% in about 1h.

Regards,
Tomoya

Power management

Power management forum

BQ34Z100EVM: Update status not updated from 05 to 06