I found some interesting data on my pack after taking a reading last night. Let me know what you guys think of the below assumptions...
I got home last night with a low 18% charge. I know it was nearing the 17% switch since I'd been driving around for 1-2 miles with 18% on the dash.
So I took a reading at this low percentage because I hadn't done so before. I usually only took them at a higher SOC. Here's the reading.
50 GIDS
3.88 kwh
25.93% SOC
87.21% SOH
88.53 HX
57.78 Ahr
59 degrees
My car has 22,075 miles on it.
What I found strange about these numbers was the 25.93% SOC compared to the 18% on the dash reading. This wound indicate that the car is holding back about 7.8% at the bottom of the pack, and given that it only ever reads as high as 97.3% SOC when full, there's another 2.7% at the top. So we have roughly 10% of unused capacity in play here? This caught my attention because when I took a reading a few weeks ago with 41% charge reading on the dash, my app said 44.82% (only a 3.82% differential). Where did the extra 4% come from on last night's reading?
Furthermore, if you extrapolate the data out and realize that the most kWh we've ever seen in a new 2015 has been 22.6 kWh of usable capacity, and add back in the 10% of hidden capacity, you get a 25kwh pack (not 24!) Furthermore if I scale out the 50 Gids/3.88 kWh comparison, I'll find that 22.6 kWh is equal to exactly 292 Gids.
Does this prove that the pack really does have more than 24kwh? Is there actually 25kwh in there? Is the Lizard nothing more than a slightly bigger pack with 1 kWh of cells that are eaten away as the battery degrades? I suppose the only way to find out for sure is the drive the pack down to absolute zero (maybe I'll do this tonight?) and see what the completely dead pack shows for remaining capacity? If it is showing roughly 7% with 0 Gids remaining, then I think we've proven that the 24kwh pack is actually a 25kwh pack.
Or am I missing something here?
I got home last night with a low 18% charge. I know it was nearing the 17% switch since I'd been driving around for 1-2 miles with 18% on the dash.
So I took a reading at this low percentage because I hadn't done so before. I usually only took them at a higher SOC. Here's the reading.
50 GIDS
3.88 kwh
25.93% SOC
87.21% SOH
88.53 HX
57.78 Ahr
59 degrees
My car has 22,075 miles on it.
What I found strange about these numbers was the 25.93% SOC compared to the 18% on the dash reading. This wound indicate that the car is holding back about 7.8% at the bottom of the pack, and given that it only ever reads as high as 97.3% SOC when full, there's another 2.7% at the top. So we have roughly 10% of unused capacity in play here? This caught my attention because when I took a reading a few weeks ago with 41% charge reading on the dash, my app said 44.82% (only a 3.82% differential). Where did the extra 4% come from on last night's reading?
Furthermore, if you extrapolate the data out and realize that the most kWh we've ever seen in a new 2015 has been 22.6 kWh of usable capacity, and add back in the 10% of hidden capacity, you get a 25kwh pack (not 24!) Furthermore if I scale out the 50 Gids/3.88 kWh comparison, I'll find that 22.6 kWh is equal to exactly 292 Gids.
Does this prove that the pack really does have more than 24kwh? Is there actually 25kwh in there? Is the Lizard nothing more than a slightly bigger pack with 1 kWh of cells that are eaten away as the battery degrades? I suppose the only way to find out for sure is the drive the pack down to absolute zero (maybe I'll do this tonight?) and see what the completely dead pack shows for remaining capacity? If it is showing roughly 7% with 0 Gids remaining, then I think we've proven that the 24kwh pack is actually a 25kwh pack.
Or am I missing something here?