BQ34Z950: BQ34Z950 Changing Parameter Reason

EMS_SAP

Part Number: BQ34Z950
Other Parts Discussed in Thread: BQEVSW

Hello,

I am using bq34z950 IC for Lithium ion battery management, 4 cell Series and 3 cell in parallel Li-ion Battery pack can you please tell me reason behind it.

Changed Parameter Of Battery

Sr. No.	Parameters	Imported GG File Value	Exported GG File Value

1	Delta Voltage	4	22
2	CC Gain	7.514	4.453
3	CC Delta	7.514	4.453
4	External Temperature offset	-0.8	-0.7
5	Board Offset	-21.3	-32.7

over 6 years ago

0 Batt over 6 years ago

TI__Mastermind 42535 points

Calibration parameters are recalculated on init after shutdown and after a mode change from chg to relax, or dsg to relax. However, we don't expect your temperature offset, cc gain and cc delta to change. It is likely the other parameters were recalculated after cycling. The rest can only be changed if calibration was explicitly done or those parameters were written to manually.

0 EMS_SAP over 6 years ago in reply to Batt

Intellectual 540 points

Hello Batt,

Thanks for your reply, can you please tell me how to resolve this

0 Batt over 6 years ago in reply to EMS_SAP

TI__Mastermind 42535 points

If you want to fix calibration, the easiest way is to do it using bqevsw again. Please open the calibration plugin there and perform calibration again.

0 EMS_SAP over 6 years ago in reply to Batt

Intellectual 540 points

Hello Batt,

Thanks for your reply, I wanted to ask you how to prevent this problem in Battery.

0 EMS_SAP over 6 years ago in reply to EMS_SAP

Intellectual 540 points

Hello Batt,

I wanted to ask you how to prevent this problem in Battery.kindly reply as soon as possible.

0 Batt over 6 years ago in reply to EMS_SAP

TI__Mastermind 42535 points

These parameters will not change unless they are manually written to by the user or if the gauge is put in calibration mode. You will only see offsets, and delta voltage change during the course of using the gauge.

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BQ34Z950: BQ34Z950 Changing Parameter Reason