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BQ40Z50EVM-561: bq40z50EVM-561 : ChemId and Parameter Update

Sridevi K93
Prodigy 190 points
Part Number: BQ40Z50EVM-561

Hi,

We want to test programming the bq40z50EVM-561 with our ChemId and the related battery parameters.

Testing with resistor cell simulator (3S configuration - 1K resistor connected for each cell terminal connection and 15V applied across the cells using PSU).

The related ChemId has been successfully programmed as shown in the attachment below:

The CHEM_ID read is also correct.

The Battery charge voltage is 5V with the cell capacity of 3Ah.

But when I export the parameters, it shows the default voltage levels & values.

When the ChemID is programmed, will it not update all the related cell parameters into the battery gauge?

Do we need to manually update the parameters? If so, advice on which key parameters need to be set initially to proceed with the testing & evaluation.

Regards,

Sridevi

  • 0
    TI__Mastermind 34775 points

    Hi Sridevi,

    The Chem ID doesn't update the gauge parameters. It's the model the gauge uses to accurately predict remaining capacity and state of charge. Yes you do have to update the gauge parameters based on your application use case and cell manufacturer's specifications.