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Original question:

BQ27441EVM-G1A: SOC doesn't exceed 60%

BQ27441EVM-G1A: GPC + BATPAKMKII

Pedro Mietto83
Prodigy 130 points
Part Number: BQ27441EVM-G1A
Other Parts Discussed in Thread: BOOSTXL-BATPAKMKII, EV2400, BQSTUDIO, BQ24250

Hi,

I'm looking to obtaining the charge / relax / discharge / relax testing as described in the Simple Guide to Chemical ID Selection Tool (GPC)
 (SLVA725) in order to get a ChemID for our battery.

I'll be using the EV2400 and a BoostXL-BATPAKMKII to get the raw data.

My question is: can I get the relaxation voltage values by just removing the USB cable from the BATPAK?

The problem is that the charger and gauge chips will still be powered by the battery, therefore there will be small current drawn from the battery and it will not be fully relaxed.

Will the voltage and current values be good enough, considering the current drawn by the charger and gauge?

Best regards.

  • 0
    TI__Guru* 76230 points
    Hi Pedro,
    Yes, that will be good enough.
    thanks
    Onyx
  • 0 in reply to Onyx Ahiakwo
    Prodigy 130 points

    Hi Onyx,

    Thanks for the quick reply.

    Is it necessary to place the Gauge into hibernate or any other mode to reduce power consumption from the battery? 

    On a slightly different topic, can I communicate to the charger with this same setup? I can't figure out how to read status and configure the charger on the BATPAK (BQ24250) using EV2400 + BqStudio.

    Regards.

  • 0 in reply to Pedro Mietto83
    TI__Guru* 76230 points
    hi Pedro,
    it depends on your use case. If you put the gauge in hibernate, upon wake up you will need to reload your configuration setting again back on the gauge as this gauge does not have non-volatile memory to store data. A better option would be sleep mode.

    Your other question is charger related and should be posted to the charger forums but yes you should be able to communicate with the charger via your set-up.

    thanks
    Onyx