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Charging 8 series lithium Ion cells

Leethal
Intellectual 695 points
Other Parts Discussed in Thread: TPS54060, BQ24610, INA169, UCC27201, BQ78PL114

I'm looking for a starting point/IC to use for charging a 33.6V LI battery. Any suggestions???

  • 0
    TI__Guru 56650 points

    We are working on a solution for high voltage charger. The evaluation board (HPA603) will be released soon.

    It uses a bq24610 to do the charging control. There are few other circuits around charger IC: 8.6V bias supply using TPS54060; half bridge driver UCC27201; high voltage current sense INA169.

    The attached file is a preliminary HPA603 use's guide. It includes sch. BOM, PCB...

    bq24610EVM-HV users guide.pdf
  • 0 in reply to Wang5577
    Intellectual 695 points

    Thanks Wang,

    This is what I'm looking for. I will have to put a Buck-Boost / SEPIC supply in front of this to run off a 10 - 36 V DC input. Pity the device is Buck only. I will buy the eval board when its released.

     

  • 0 in reply to Leethal
    Prodigy 120 points

    Leethal,

    You might look at the bq78PL114 / bq76102 chip set for your application.  This is not a stand alone solution, but it will manage charge of 8 cells, and includes gas gauging and cell balancing.  Further, the bq78PL114 8S EVM is currently available.

    David

  • 0 in reply to David S48133
    Intellectual 695 points

    Hi,

    We are using a battery which has an interal protection /cell balancing board/ with the 8 series cells in a fibreglass tube. It only has the positive and negative coming out on a lead to a power connector. Unfortunately your suggestion won't help but thank you for your input.

     

    Lee.