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BQ25619: Cell support

PAN-M
Mastermind 8375 points
Part Number: BQ25619

Hi,

LiFePO4 is included in a screen of "Cell chemistry" of bq25619.
If you are supported, please teach me how to use.

Best Regards,
PAN-M

  • 0
    TI__Mastermind 25800 points

    Hey PAN-M,

    I do  not see any attached screen.

    LiFePO4 is supported in this charger. The typical CV voltage of LiFePO4 is 3.6V. You would have to program REG04 via I2C to set VBATREG to 3.6V.

    Regards,

    Joel H

  • 0 in reply to Joel Hernandez II
    Mastermind 8375 points

    The charge profiles of LiCoO2 and LiFePO4 are different, is there not the problem?

    Regards,
    PAN-M

  • 0 in reply to PAN-M
    TI__Mastermind 25800 points

    From my experience,

    There is minor difference in the charge profile unless you plan on performing an overcharge method.

    However, standard charging for LiFePO4 is CC-CV. Once small difference may be the pre-charge transition threshold, but I have found that many FePO4 batteries also use 3.0V as the pre-charge to fast charge transition point. 

    Now if you are overcharging the battery which FePO4 is allowed to do, the method is a slight variation of the CC-CV which more akin to the Lead-Acid, which allows a higher overcharge voltage, and then a lower float charge voltage.

    If your battery manufacturer specifies something different, please share it and we can work through it.

    Regards,

    Joel H

  • 0 in reply to Joel Hernandez II
    Mastermind 8375 points

    Thank you for support.

    I understood, our customer confirm the specifications of the battery.

    Regards,
    PAN-M