• State TI Thinks Resolved
  • Replies 4 replies
  • Answers 2 answers
  • Subscribers 64 subscribers
  • Views 62 views
  • Users 0 members are here
Support feedback
Options
Options
Related

BQ34Z100-R2: Some questions about going to production

Matthew Underwood
Prodigy 70 points
Part Number: BQ34Z100-R2
Other Parts Discussed in Thread: BQ34Z100

Tool/software:

Hello, I just have a few general questions about how to run the bq34z100-r2 in production.  

  1. Is there a way to tell on the bq34z100 if power has been lost, like someone unplugged the battery and plugged it back in? Is a flag set or anything? What do we do in this situation?
  2. If the battery goes to 0 and has to be recharged, do we rewrite the golden image immediately at FC or after taper? Does it matter? What's the whole procedure here?
  3. Does the i2c need to be pulled up to the battery or can it be pulled up to an independently powered rail? 
  4. There is no GAUGE_EN equivalent, right? It's just always gauging? We just want IT_ENABLE and CAL_ENABLE to be off in production?
  5. I'm confused about the purpose of actually sealing the battery. Does it protect me in some way? Some registers can still be written when it's sealed, right?
  • 0
    TI__Mastermind 26845 points

    Hello,

    This question has been assigned and will be reviewed when possible, please attach your .log /.gg files associated with the project.

    Thank you,
    Alan

  • 0 in reply to Alan Frias
    TI__Mastermind 26545 points

    Hi,

    1) If the battery is unplugged the BQ34z100 will lose power.

    2) No, the gauge is ready to gauge multiple charge discharge cycles, the golden image only needs to be reflashed if the batteries are being replaced with new cells.

    3) A power railed is recommended.

    4) IT_ENABLE is basically GAUGE_EN, CAL_ENABLE should only be on when calibrating, IT_ENABLE should be turned on when you want gauging to begin.

    5) No, Sealing the device keeps your parameters locked in and they will not change when sealed.

    Regards,

    Diego

  • 0 in reply to Diego
    Prodigy 70 points

    1. I understand that it will lose power, but when it comes back online will it be able to indicate to me somehow that it lost power? 

    2. OK, so it can start tracking the state of charge regardless of what it is when the battery is plugged in initially?

    3. I'm sorry, this is a little unclear still. I will have several power sources in my circuit. Is it alright to pull the i2c line specifically up to one of the other power sources?

    4. Right, so do people usually turn on IT right after flashing the golden image to a production board? Or should it be on when the golden image is made?

    5. So why would they change? I suspect that part of my confusion is around what you are referring to as "parameters" here. Certain things have to change over the normal course of IT, like the state of health, the max capacity, etc. But why would anything else change? I feel like I am missing something here.

    Thanks

  • 0 in reply to Matthew Underwood
    TI__Mastermind 26545 points

    Hi,

    1) No

    2) When the gauge powers up it will force an OCV measurement. It will use this initial measurement to calculate all registers. Upon the second ocv measurement gauging should be accurate.

    3) yes

    4) After flashing onto the board.

    5) Noise.

    When I say parameters, I am referring to all values entered into dataflash. This is what sealing protects. Things calculated by the gauge such as soc are registers.

    Regards,

    Diego