BQ27510-G3: 4.1V charging instead of 4.2V - change parameters manually

Hello Stephane,

You should've configured those parameters BEFORE performing the learning the cycle. I do not advise generating a golden image yet. Steps to configuring a fuel gauge are: Program ChemID --> Configure Data Memory Parameters --> Learning Cycle --> Generate Golden Image.

Regards,

Dear Nabil,

I saw in different posts that the learning cycle must be done at a voltage of 4.2v otherwise the battery will not be recognized.
Now I want to know what are the parameters to change to adapt to 4.1V before generating the golden image ?
The steps are
Program ChemID --> Configure Data Memory Parameters (at 4.2V) --> Learning Cycle --> Configure Data Memory Parameters (at 4.1V, design capacity, qmax, table ra, cycle count, charging voltage, terminate voltage...) --> Generate Golden Image

I want to know is there is docs for the step :
Configure Data Memory Parameters (at 4.1V, design capacity, qmax, table ra, cycle count, charging voltage, terminate voltage...)


Thanks
Stéphane

There isn't a document on this at the moment. However, it seems like the only things you'll need to change is the charging voltage parameters. You will however need to make sure you're charging to atleast 90% of your design capacity. Also, we highly advise you run another learning cycle to optimize it and get the new Qmax value.

Regards,

Nabil

Dear Nabil,

To change the charging voltage, I should modify a resistor on the board.

For this, I need to disconnect the EV2300 tool and disconnect the battery. 

Is it possible to disconnect the EV2300 tool, disconnect the battery, power off the gauge between two learning cycles ?

what must i do for update status, IT Enable, reset etc ...and for the parameter design capacity, qmax, etc... between two Learning cycles ?

Thanks

Stéphane

Dear Nabil,

To change the charging voltage, I should modify a resistor on the board.

For this, I need to disconnect the EV2300 tool and disconnect the battery.

Is it possible to disconnect the EV2300 tool, disconnect the battery, power off the gauge between two learning cycles ?

what must i do for update status, IT Enable, reset etc ...and for the parameter design capacity, qmax, etc... between two Learning cycles ?

Thanks

Stéphane

I meant change the charging voltage parameters in the data memory to 4100mV (Charging Voltage, Cell0 V at Chg Term), the rest of the parameters don't need to be touch prior to this second learning cycle. You can disconnect the gauge from the EV2300 during the learning cycle, although it's highly recommend, since the bqStudios GUI will allow you to monitor the registers in real time.

Nabil,
OK for charging voltage and Cell 0V at ChgTerm 4100mV
At the end of the first Learning cycle, update status is 02, should i keep update status at 02 or should i modify to 00 ?
Can i power off the gauge and disconnect the battery between two learning cycles?
Because to modify the charging voltage on my board, i should modify a resistor (I use bq24172 charger)
Thanks
Stéphane