Ok, the cat is sleeping, so Ican try this again, but it will be much shorter this time.
My math, and it's verified by the photos in the teardown that I posted in "Something for the Enginerds" is that there are 360 cells total. 130 in the upper pack, 230 in the lower.
In the photos, we see that there are large 20-cell modules, and half sized 10-cell modules. In the upper pack are 6 full size and 1 half size in a single row. Thats 6x20 +10=130. In the lower pack, there is a row of 6 full size, and then a second row of 5 full size and 1 half size. Thats 6x20 + 5x20 + 10=230
So the total is 360.
But 360 is not whole number divisible by 86.
The teardown states that the full size module has a 5p4s arrangement, and that the half size has an 5p2s arrangement. While possible, I have a problem with this. It means that 10 cells have 1 terminal all bonded together. Look at the physical dimensions of the half size module. All 10 modules inside are bonded at the midpoint. How? From the teardown, the tabs of each cell look too short to reach from one end of the module to the midpoint.
Also this, lets consider that all of the modules are in series. That makes 17 full size modules and 2 half size modules. Lets say the 2 half size modules are equivalent to 1 full size module. If the battery produces 400v, just supposition here, then each full size module produces 400/18=22.22 volts. So it takes 4s to make 22.22, so each cell produces 5.5 volts. Um, no.
So what if we work backwards, and say that each cell produces 4 volts? Thats 4x4x18 = 288 Volts. Again, no. Thats not happening.
But what about the 86? In each full size module, there are 4 sets of 5 cells. There are 17 full size modules. 17x4 is 68. Not anywhere near 86.
But what if the arrangement was 4p5s in the full size module and 2p5s in the half size module? The person creating the report might not have fully understood battery arrangement and made that mistake. For compatibility, the half size modules would have to be wired in parallel. (who knows how that would work, they are in separate packs) Lets do the math again. 400/18=22.22 volts. 22.22/5 is 4.4volts per cell. Getting closer to reality. Working backwards, 4x5x18=360 "Well Gooollllyy Sargent Carter" it looks like we have winner.
So that seems good 4p5s, it is still a stretch to bond 8 cells together, but what about the 86? In each full size module, there are 5 sets of 4 cells. There are 17 full size modules, 17x5=85 Thats good, but there are the two half size modules, in separate packs, how do they add to be 1?
Dare we go 2p10s for the full size module and 2p5s for the half size module? Skipping to the math: 22.22/10=2.22volts, kind of odd for a lithium cell, going the other way 4x10x18=720Volts, too much, but what if we were to half the packs, meaning that we take both packs as one imaginary pack, and in that imaginary pack there are two rows, each putting out 360 volts, but in parallel with eachother?
So 18/2 =9 full size modules in each imaginary row. But we still have the 86 problem. Now two rows, so 43. 43/9=4.78 nope, needs to be a whole number.
86=86x1=43x2 I can't seem to find any other whole number factorials for 86.
Hmm, this seems like a dead end. There is this: What if the 86 isn't from 1 to 86, but 0 to 86? If it was, then there would be a total of 87, and the two extra (87-85=2) could be for the two half size modules.