I think my system is working OK. I am gauging capacity in a new Z95 design. I would like confirmation that the capacity is reading correctly.
I have chosen to model capacity as energy-based. I am not sure whether to expect the units to be mWh, 0.1mWh or 10mWh.
In The Tech reference "SLUU264A–November 2006–Revised August 2007" I see ...
Section A.25 [page 81] states that design capaicity will be in "10mWh"
Section C.5.1.14 Design Energy (Offset 24) [Page 144] states that design capaicity will be in "0.1mWh"
Sections A.16 and A.17 [Page 77-78] indicate 10mWh
In practice, the EV2300 system appears to be reporting in full mWh, with no need of scaling.
Example: We expected 3.7V * 2300mAh * 4cells = 34,040mWh, and that's what we put in the gg file.
After learning 2 cycles we see, reported in the SBS window, about 34,000 mWh, like we expect.
We see no need to multiply or divide anything by 10 at any point in the flow.
When we extract a gg file, we see the full mWh, no scaling required.
Though I like this result, please help me make sense of the unnecessary scaling suggested by the documentation.
It may be that I am getting some free scaling before reporting in the SBS window of the bq Eval SW.
If I am reading though the SMBus with my own firmware, perhaps THEN I must scale it.
Please tell me what you can about this.
Regards,
Michael A. Banak
http://eclectic-engineering.net