Part Number:BQ34Z100-G1
Hi,
I'm attempting to run an optimization cycle on a BQ34Z100-G1 fuel guage with a LION 8 cell 31.6V, 5.6A, 163.5Ah 8 cell battery.
I've sucessfully followed the following procedure up to step 7. I found the procedure posted by Thomas on this forum.
1. Send an IT_Enable (21) command to turn Impedance Track.
2. Discharge to empty
3. Wait until the OCVTAKEN flag turns red.
4. Charge to full (FC bit set.)
6. Wait until the OCVTAKEN flag turns red. You should see VOK turn green after Qmax has learned. You should see Update Status change to a 05.
7. Discharge at a C/8 rate down to Term Voltage.
8. Wait until the OCVTAKEN flag turns red. You should see Update Status change to a 06 during the rest period.
After discharging (I used C/5 rather than C/8), my battery gets to about 5.6V before stopping discharging. I believe this is under the terminal voltage I've set of 3V (per cell) so it should be able to update the Ra table.
However, despite OCVTAKEN turning red, the update status never updates to 06. Both it and the learned status stay as 0x5 and my error stays at 3%. I've waited for 24 hours but it still doesn't update.
Is there anything else I can try to make the Ra table update and get 1% accuracy? I've attached my most recent srec file for analysis. Would appreciate any help.
(Please visit the site to view this file)