• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 66 subscribers
  • Views 225 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

BQ34Z100-G1: Replaceable batteries

Julian Eyre
Prodigy 240 points
Part Number: BQ34Z100-G1

Hi,

When a Golden Image file is created, the Update Status is initially set to 2 to indicate Qmax and Ra data are learned but IT is not enabled.

In my setup, the battery may be replaced by another battery which may or may not be at the same point in its lifecycle (i.e. number of discharge cycles may vary).

My question is, therefore, after loading the Golden Image file into a new system, should I enable the IT algorithm or not?  I.e. should I keep the system with Update Status = 2 and not allow any further learning to take place, or should I enable IT thereby setting Update Status = 6?

Regards,

Julian

  • 0
    TI__Mastermind 42535 points

    Hi Julian,

    If you are changing batteries, our advise is to enable IT so that the gauge can slowly learn the actual capacity over several discharge cycles.

  • 0 in reply to Batt
    Prodigy 70 points

    Hi Batt,

    If in pre-production, I learn over several discharge cycles, then create a Golden Image, would it then be necessary to enable IT in the final product? N.B. There is a possibility that a totally different battery to the one used for learning is used, and I wouldn't want that one to mess up the learnt data (particularly the hidden data).

    Also, if IT is not enabled, will the FCC be fixed?  Would QMax be fixed?  Or will one or both of them still vary depending upon conditions?

    On a related question, what is the effect of the RESET command?  Is this the same as a simple power cycle?  Does it change data such as FCC? (I know that it zeros passed charge).

    Many thanks,

    Julian

  • 0 in reply to Julian Eyre1
    TI__Mastermind 24870 points

    Hello Julian,

    It is recommended to have IT Enabled for production. Qmax will not learn. I suggest running a few cycles to see if FCC will learn in your system.

    The RESET command is a firmware reset that will take an OCV, force a simulation. It is not the same as a power cycle as the power cycle will zero out RAM registers. The FCC will change, but RESET command is typically sent in a non-relax state.

    I suggest you order the bq34z100-G1 EVM and use TI tool chains to determine behavior to get quicker responses. If you already have one, I would go through the learning cycle and EVM User's guide.