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BQ4050: Termination Config

Gary Wang1
Intellectual 350 points
Part Number: BQ4050

Dears,

Whether the termination configuration parameters, in addition to voltage and current, are related to time, SOC,RM, etc.

Thanks.

  • 0
    TI__Mastermind 42535 points
    Hi Gary,

    Yes, the termination parameters decide both chg and dsg termination values wrt to gauging. Therefore they are directly related to RSOC, RM and FCC. They can be found in charge section in df for chg termination and in gas gauging, IT configuration for both chg and dsg.
  • 0 in reply to Batt
    Intellectual 350 points

    Hello Batt,

    My customer appears when the RSOC is 10% in the actual test process, but the voltage and current have met the condition of terminating charging(Charge Term Voltage and Charge Term Taper Current), then RSOC jumps to 100% directly.

    The customer's cell is lithium iron phosphate, and the full voltage setting is low.

    My question is, in addition to Charge Term Voltage and Charge Term Taper Current, what conditions do RSOC,RM and FCC need to meet to terminate charging?

    Thank you for your support. I'm looking forward to your reply.

  • 0 in reply to Gary Wang1
    TI__Mastermind 42535 points

    Have they characterized their LFP cell? They need to get the appropriate CEDV parameters first. Otherwise a jump is expected. If you want it to terminate at current taper please set FC set % = -1% (minus 1%).