BQ27421-G1: OCV data

Q1. I guess this device will use the OCV data table in BQ27421 when performing Impedance Track ™. Would you disclose the OCV curve data, because I want to refer curve data?
[Andy] As far as I know, the OCV table is NOT open to customers.

Q2. Should I read the value with the StateOfCharge (), SOC, (0x1C and 0x1D) command when I want to check the remaining capacity when discharging?
[Andy] Yes. SOC returns a predicted remaining battery capacity expressed as a percentage of FullChargeCapacity(), with a range of 0 to 100%.

Q3. If there is a big difference between the actual measured capacity and the value (SOC) obtained by the StateOfCharge () command, what can you guess the factors that occur?
[Andy] I guess your question is related to SOC accuracy. I don't there will be a big difference when the gauge device is properly configured. I would suggest you find the right part (BQ27421 has 3 differents part number) with the help of GPCCHEM.

Q4. What does the value read with the StateOfHealth () command represent for a battery?
[Andy] According to TRM, this function returns an unsigned integer value, expressed as a percentage of the ratio of predicted FCC over the DesignCapacity().

Q5. What does the value read by the StateOfChargeUnfiltered () command represent for the battery?
[Andy] You cand find the detailed explanations in the TRM.

Q6. We can found the description reading R_a in P.45 to 46 of bq27421 Technical Reference. Do I need to set Ra to perform Impedance Track? Is the default value OK?
[Andy] The Rab table will be updated during the learning cycle and discharge cycle.