Hi,
I have a 2500mAh battery pack where I perform the learning cycle with 0mAh reserve capacity. Once the learning cycle is complete, in the final step I charge the pack to around 730 to 780mAh capacity to fulfill the shipping regulation (30% RSOC).
Once the pack is charged to about 30%RSOC or around (730 to 780mAh) Rem capacity, I take out the pack, and change the reserve capacity to 650mAh. Then the remaining capacity and the Full charge capacity(FCC) changes by the same value of reserve capacity ( around 650mAh delta) shown below. This makes sense as that's how the reserve capacity should perform.
Pack E030 | Post 650 Res- E030 | delta | ||
Qmax pack | 2639 | 2639 | ||
RSOC | 31% | 8% | ||
ASOC | 32% | 6% | ||
REM Cap | 785 | 138 | 647 | |
FCC | 2548 | 1895 | 653 | |
Pack E031 | Post 650 Res- E031 | |||
Qmax pack | 2628 | 2628 | ||
RSOC | 31% | 7% | ||
ASOC | 32% | 6% | ||
REM Cap | 777 | 128 | 649 | |
FCC | 2533 | 1883 | 650 |
But, when I change the reserve capacity to 750mAh rather than 650mAh, the FCC changes by the same amount but the Rem cap does not change by the same delta of 750mAh.
Pack E030 | Post 750 Res- E030 | delta | ||
Qmax pack | 2610 | 2610 | ||
RSOC | 30 | 5 | ||
ASOC | 30 | 4 | ||
REM Cap | 738 | 76 | 662 | |
FCC | 2542 | 1781 | 761 | |
Pack E031 | Post 750 Res- E031 | |||
Qmax pack | 2580 | 2580 | ||
RSOC | 30 | 4 | ||
ASOC | 30 | 3 | ||
REM Cap | 734 | 65 | 669 | |
FCC | 2527 | 1771 |
756 |
|
My question is :
1. How does the gauge account for rem capacity when the reserve capacity is higher than the present value of rem capacity?
In my case, when I performed learning cycle with 0mAh res cap, and did the final charge the Rem cap has value of 738mAh(Pack 030) and 734mAh(Pack 031). Then when I changes the reserve capacity value to 750mAH, which is greater than the present value of remaning capacity, the new rem cap value should be (738-750 = -12mAh) and (734- 750 = -16mAh). Why is the gauge showing the new Rem capacity of 76mAh and 65mAh.
Can you let me know why gauge is showing that value and how it calculated the new Rem capacity