Other Parts Discussed in Thread: BQ34Z100EVM, BQSTUDIO
I am working on a custom hardware/software design that contains a bq34z100-G1 gauge for
measuring the status of the battery pack that powers the system.
The battery pack consists of three 18650(LGC B4) series cells (Li-ion). We use a
relatively high measurement resistor of 75mOhm.
I also have a bq34z100EVM board with the same gauge chip.
I am wondering how I should setup the gauge. Maybe you can comment on this.
My plan is as follows:
Using bqStudio and the EVM board (and sluu904a)
o set the number of series cells (3)
o set VOLTSEL
o RESET
o Calibrate Voltage
o Calibrate temperature
o Callibrate current at about 500mA.
o Program chemID (0260)
o Save the info as a golden image.
Q: Should I also set the voltage divider or is that done automatically at voltage calibration?
Q: Should I also set the design capacity?
Q: Should I also set the design energy?
Q: Should I set anything else?
Using the actual board:
o Program golden image saved before
o RESET
o Discharge battery (0.2C, battery empty is indicated by a voltage of 3*2.75V)
o Relax (5 hours)
o Enable IT
o Charge battery (0.5C, battery full is indicated by a current of 50mA)
o Relax (2 hours)
o Discharge battery (0.2C, battery empty is indicated by a voltage of 3*2.75V)
o Relax (5 hours).
Q: During relaxation time, the system will draw some current (<20mA). Do you think
that this is a problem?
Q: And now? I guess I have to charge it again because I can not deliver a system with
an empty battery to the customer.
