Other Parts Discussed in Thread: BQSTUDIO, GPCCHEM
Tool/software:
I'm attempting to use a BQ27427 with a Shockli (Funkowa) 18350 battery. It claims 1100 mAh capacity, a max continuous discharge of 10 A, and 3.7 volts. The discharge curves they provide show a starting voltage of 4.2 volts and a final voltage of 2.8 volts..
I am using the bqStudio software. I do not see this battery in the chemistry ID list on the Internal Chemistry tab. I do not know how to decide what would be a similar chemistry ID.
With battery chemistry set to 1202 (which I am sure is wrong), nominal capacity set to 1100 mAh, nominal energy set to 4070 mWh, Maximum taper current set to 100, Terminate voltage set to 2800 mV, , and the battery discharged to 2.85 volts, I start a manual learn cycle.
1) The cycle jumps immediately to "Discharge" to I attach a 1 watt load.
2) When the voltage is nearing 2.75 volts, I disconnect the load to avoid damaging the battery.
3) The learning cycle then jumps to the first "Relax" state (the one prior to "Charge") and a 6-hour timer starts.
4) From what I understand, bqStudio is now waiting for a relax status bit to be set.
5) After 6 hours, the process times out and aborts the learn cycle
- From what I understand, this can happen due to improper battery chemistry selected. Is that true?
- From what I understand, I can use the TI website tool to generate a ChemID file from data captured by bqStudio, but have to complete a learn cycle first. Is that true?
- Any suggestions?
