BQ27520-G4: Some questions about system side gauge

Hello,

Pack Side = One gauge, one battery pack for the life of the device
System Side = Changeable batteries

Statham Su said:

If we want to use system side gauge, what the SOC and SOH accuracy will be after changed battery cell?

If using same type of cell after replacing the battery, SOC and SOH won't be a problem. For this, the system side gauges support battery removal detection. If using a different chemistry after replacement, then the gauge needs to learn the cell once again.

Statham Su said:

For one cell on ePOS terminal application, which system side gauge part number you will recommend?  

To answer this, I need more info. How many cells? Do you have a cell chemistry preference? Communication interface preference? Max capacity? 

Please see below more info on system side vs pack side.
https://e2e.ti.com/support/power-management-group/power-management---internal/f/power-management---internal-forum/1124728/bq27220-what-is-the-main-difference-of-system-side-gauge-and-pack-side-device?tisearch=e2e-sitesearch&keymatch=pack%20side%20vs%20system%20side#


Regards,
Jose Couso

Hi Jose:

I cannot check the content of your link, would you please recheck your link?

And the other please refer our application battery cell as below.

1S1P, Cell chemistry: TBD, I2C and Capacity 720mAh.

Looking forward your feedback.

Thanks a lot.