tattoogunman wrote:ydnas7 wrote:there is alot we don't know, but what we do know is that the 30kWh pack and the 60kwh may share the same footprint, their profile is different, so they are for different generations of cars.
Personally, I'm predicting carbon A pillars for Japanese cars and other export market cars, but steel construction for USA made cars and unknown for UK made cars.
So now we have 5 main variants, obviously not all will be available simultaneously in any one market.
Nissan LEAF Select (38kWh) = 38/30x107 = 135 mile EPA range (old pack)
Nissan LEAF S (Stripper) (Smyrna) (40kWh) = 40/30 x107x1.07 = 142 mile EPA range (new pack, part filled)
Nissan LEAF SV (Smyrna) etc = 60/30 x 107x1.07= 229 mile EPA range (new pack, fully filled)
Nissan LEAF S (Stripper) (Japan) (40kWh) = 40/30 x107x1.15 = 164 mile EPA range (new pack, part filled)
Nissan LEAF SV (Japan) etc = 60/30 x 107x1.15 = 246 mile EPA range (new pack, fully filled)
actually, I only predict 2 available in any one market at a time, but that globally, initially all 5 will be available somewhere (simultaneously)
the least likely of these to exist is the 40kWh strippers, they may go the way of Tesla model S 40kWh ....
What does it mean when it says "new pack, part filled"?? This isn't similar to what Tesla has been doing where they give you the car and if you want the "full" capacity out of the pack they charge you more money or something is it?
I'm predicting 2 physical packs with a different profile,
1st, current pack profile
2nd, larger pack profile
although the area (footprint) of the packs are the same, the heights are different, the metal floorpan in the car is different (and incompatible) between the 2 packs. This is
the key safety and structural piece of metal in a modern car, it affects all the other metal pieces hanging off it, and all the seating attached on it, massively important for crash test etc. Think of it as the foundation of a car.
the current pack profile is due for the final iteration of 1st gen cells.
1st gen cells
initial 24kWh
'lizard' 24 kWh (new electrolyte)
30 kWh (new cathode - NMC)
37ish kWH (new anode) (about 1.55x original 24kWh)
keep in mind, other changes like thickness also occur with each stage
2nd gen cells
60kWh same cathode/anode/electrolyte as final1st gen cells, just different dimensions/packing
initially per kWh, the 1st gen will be significantly cheaper than the 2nd gen. but over time the 2nd gen should get cheaper. It makes sense to keep 1st gen going until 2nd gen gets cheaper. But second gen won't get cheaper until it has existed for some time.
So like Tesla, Nissan may part fill its packs when 2nd gen is cheap enough, Tesla packs 75/90 have different Voltages, Tesla 90/100 has different amps. I would expect Nissan to follow the different amps but at 40kWh/60kWh. Conceptually they could just omit some cells and get different Voltages like Tesla/Mitsubishi