Other Parts Discussed in Thread: GPCCHEM, BQSTUDIO, BQ34Z100
Dear all,
Last week I started a couple of discharge/charge cycles in order to check data consistency on my BQ34Z100EVM and battery Yuasa NP2.3-12FR (12 V, 2.3Ah).
The steps I used (every step is logged, I have a 32Mb file with all data that I may attach if necessary):
- Full discharge from 12.7V to 11.9V, discharge current 60mA, time spent 24hrs
- Sleep for 4hrs
- Full charge from 11.9V to 13V (spike at 13.8V), time spent 20hrs
- Sleep for 5hrs
- Full discharge from 13V to 11.2V, discharge current 120mA, time spent 19hrs
- Sleep for 2hrs
- Full charge from 11.2V to 13V (spike at 13.8V), time spent 20hrs.
Then I let the module and the battery in sleep mode for 4 days.
On Friday morning, when the sleep started, the battery was 100% charged and the "Full Charge Capacity" was at 2215 mAh (very similar to nominal 2300mAh value). This morning, after 4 days in sleep mode and nobody touching anything, the charge level was 0%! Voltage level was 12.8 instead of 13V (acceptable) but "Full Charge Capacity" was at 0 mAh!
I'm using chemistry ID 809 (suggested by GPCCHEM tool) on bqStudio 1.3.102 and no error was marked.
What may cause this behaviour?
Is it normal that after a long weekend in idle the information get lost?
Many thanks,
Best regards.
Massimo