Lecture about Renault Zoe and its future
What can we extract from this video?
LG Chem’s cells have a nominal voltage of 3,75 V, most NMC cells are rated at 3,7 V.
The battery has 192 cells, each with 36 Ah capacity. 192 x 36 Ah x 3,75 V = 25,92 kWh
The current Zoe’s cells have low energy density. 157 Wh/kg and 275 Wh/L. There is wide scope for increasing its capacity.
Renault’s next step for the Zoe is a 40 kWh battery.
Current owners are promised to be able to upgrade their batteries.
My thoughts about it.
I already know the latest available LG Chem’s cells have 65 Ah and weigh less than a kilo. I expect the next Zoe’s battery to have 46,8 kWh (192 x 65 Ah x 3,75 V) capacity in total and around 42 kWh usable. The weight will increase, but not much. The current 36 Ah cells weigh 0,86 kg, the 65 Ah cells weigh a little less than 1 kg. In a 192 cell battery, this means that the new battery will be almost 27 kg heavier.
Since the new cells are already available, the only thing that prevents a new battery for the Zoe today is the lack of competition in electric cars. I expect the new battery arrive next year, will probably be announced in March at the Geneva Auto Show.
The new 65 Ah cells from LG Chem will make possible 3 different battery configurations:
96 cells (all in series) will supply 23,4 kWh (21 kWh usable) for low range EVs, like Smart ED or Twingo ZE.
192 cells (groups of 2 in parallel) will supply 46,8 kWh (42 kWh usable) for mid range EVs, like Zoe.
288 cells (groups of 3 in parallel) will supply 70,2 kWh (63 kWh usable) for high range EVs, like Chevrolet Bolt or Nissan Leaf Gen 2.
This is the technology available today. Automakers just have to feel the need to use it.
Carlos Ghosn, CEO of the Renault-Nissan alliance said several times that he wouldn’t lead the electric revolution but would be ready for it if it happens. Who will make him take the next step?
Tesla Motors please bring the Model III as soon as possible.