• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 548 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.

BQ27520-G4: 37% of DF.Design Capacity

K.Yaita
Guru 29720 points
Part Number: BQ27520-G4

Hi Team,

I would like to ask about the following sentence in page 4 of the application note.
>PassedCharge has to be more than 37% of DF.Design Capacity for an update to occur.
http://www.tij.co.jp/jp/lit/an/slua450/slua450.pdf

Should I consider Qmax couldn't have been updated when actual battery capacity became less than 37% of Design Capacity?

Best Regards,
Yaita / Japan disty

  • 0
    TI__Guru* 76230 points

    Hi Yaita,

    The battery capacity should never go to 37% of design capacity. A rechargeable  battery is considered dead and need to be replaced if it only has 80% of its original capacity.

    The 37% stated simply means you have to have passed accumulated charge of atleast 37% of the design capacity to allow qmax to update in the field. For the initial learning cycle, it is 90% of design capacity

    thanks

    Onyx