mux wrote:

The same goes for discharging and regenerative braking; these are based on the Hx (internal resistance) signal, and this will change if you put more cells in parallel, so you will be able to regenerate earlier and harder, and you won't get power limited with a worn battery.

Are you implying that Hx actually represents the internal resistance, e.g. milliohms, of the battery or it's conductance (mhos)? To some, it's

another measure of battery health. To others, it's another variable that decreases with battery degradation over time. My Leaf data over

the years indicates that the internal resistance of the Leaf's battery has a negative temp coefficient and increases over time with battery

degradation, as one might expect, and doesn't correlate with Hx directly (dR/dT):

11/20/14 -13,700 miles, 76 mohms per LeafDD, 20 Deg, 73% SOC

11/27 -13,800 miles, 67 mohms per LeafDD. 25 deg, 63% SOC

11/30 - 13,900 miles, 56 mohms per LeafDD, 27 deg, 71% SOC

12/2 - 14.100 miles, 55 mohms per LeafDD, 28 deg, 67% SOC

12/16 - 14,500 miles, 89 mohms per LeafDD, 15 deg, 93% SOC

12/27/14 - 14,800 miles, 103 mohms per LeafDD, 11 deg, 24% SOC

3/10/15 - 17,400 miles, 60 mohms per LeafDD, 30 deg, 73% SOC

3/14 - 17, 550 miles, 56 mohms per LeafDD, 32 deg, 47% SOC

4/14 - 19,100 miles, 59 mohms per LeafDD, 25 deg. 38% SOC

5/4 - 19,989 miles, 64 mohms per LeafDD, 24 deg. 48% SOC

5/15 - 20,400 miles, 73 mohms per LeafDD, 20 deg. 41% SOC

5/22 - 20,700 miles, 58 mohms per LeafDD, 28 deg. 50% SOC

12/10/15 - 28,000 miles, 90 mohms per LeafDD, 19 deg. 92% SOC

4/5/16 - 32,000 miles, 74 mohms per LeafDD, 24 deg, 55% SOC

5/16 - 33,700 miles,89 mohms per LeafDD, 22 deg, 47% SOC

5/16 - 33.700 miles, 58 mohms per LeafDD, 31 deg, 76% SOC

10/5 - 39,300 miles, 100 mohms per LeafDD, 22 deg, 50% SOC

10/6 - 39,400 miles, 61 mohms per LeafDD, 30 deg, 51% SOC

10/7 - 39,500 miles, 80 mohms per LeafDD, 25 deg, 56% SOC

10/15/16 - 40,000 miles, 71 mohms per LeafDD, 27 deg, 45% SOC

If possible, please reference a source for a reliable definition of Hx.

Leaf SL MY 9/13: 70K miles, 49 Ahrs, 5.1 miles/kWh (average), Hx=70, SOH=78, L2 charges to 100% > 1000, max battery temp < 95F (35C), min discharge point > 20 Ahrs