This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • TI Thinks Resolved

BQ27531-G1: SLUUA96A - bq27531-G1 Techical Reference Manual - issue

Prodigy 70 points

Replies: 11

Views: 201

Part Number: BQ27531-G1

Hello,

In this User Guide, at page 28 there is a mistake:

What I need to know now:

is there any other wrong info in this document?

can you confirm if the below underlined text is false or true:

Thank you in advance,

Marius

  • Hi Marius

    Update status is 00, and stays 00 after it enable is sent. When learning is complete update status will be 02.

    Why do you think the part no which you underline that the gauge detects is wrong?

    thanks

    Onyx

  • In reply to Onyx Ahiakwo:

    Hi Onyx,

    Thanks for clarification.

    I do not think, I observe in bqStudio that those register bits values are 101, not 010 as specified in document.

    So, should I consider this document as a challenge for TI customers to find the n'th mistakes? Is there a prize for this?

    Please tell me how many errors should I expect for: dozens, hundreds?

    Thank you,

    Marius

  • In reply to Marius Boncea:

    Hi Marius,

    The feedback has provided to the responsible teams to correct thetrm.  Pls understand that changes to the data sheet  or TRM of a released device isn't as trivial as simply opening and editing a document in MS word and voila,- it goes live. There are processes that has to followed for a simple edit to occur. Unfortunately, i do not make those rules. In the meanwhile please use bqstudio as the true source and if additional clarification is needed, post on here on the forums. Sorry for the trouble.

    thanks

    Onyx

  • In reply to Onyx Ahiakwo:

    Hi Onyx,

    Do you have any idea about the behavior from below?

    Somehow the gauge does not know that the battery got discharged meanwhile :) 

      

    BR,

    Marius

  • In reply to Marius Boncea:

    Marius,

    If the gauge has not been properly configured, there is no way you can trust the values from it. You need to program the correct chem id for your cell and should run a learning cycle before the SOC reported by the gauge wil be accurate.

    thanks

    Onyx

  • In reply to Onyx Ahiakwo:

    Hi Onyx,

    The gauge is properly configured and not even for one exceptional reason its behavior should be like that.

    I guess this device is a total failure, having a chaotic documentation also with errors on it, and besides all of that, the technical support seems to be inexistent or incompetent.

    I did not expect to find TI in such an infamous condition...

  • In reply to Marius Boncea:

    Hi Marius

    No the gauge is not configured correctly. Your update status is not 02 on all the update status fields. After learning has been completed you need to copy the learned ra tables and qmax to the unlearned field. If the gauge uses an unlearned table you will see the kind of issues you are seeing.

    thanks

    Onyx

  • In reply to Onyx Ahiakwo:

    Hi Onyx,

    Would you be so kind to indicate the document where this "clue" like "copy the learned ra tables and qmax to the unlearned field" is given?

    Thank you!

    Marius

  • In reply to Marius Boncea:

    Hi Marius

    http://www.ti.com/lit/an/slua902/slua902.pdf

    section 2.7.

    Though not written for this gauge, the process is the same for our system side gauges.

    thanks

    Onyx

  • In reply to Onyx Ahiakwo:

    Hi Onyx,

    I did the copy thing and it seems the problem remains. 

    Can you check in the attached archive, is there anything else that is not properly configured?

    Thanks,

    Mariusgauge issue.zip

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.