Not according to the original article in Daily Yomiuri Online, which quotes 'Nissan officials' for the switch to Hitachi.Herm wrote:Perhaps its a switch to Toshiba's lithium titanate cells, they are heat resistant, long lived and can tolerate fast charging... but they are heavier. The Honda Fit BEV uses these cells.
Rich K wrote:I'm very skeptical of this story for a couple of reasons:
1. The engineering involved to change cells AND supplier is not trivial. Design, packaging, battery controller design * calibration; vehicle integration then durability testing would consume probably two years. That means for Nissan to make this change, they would have had to start around two years ago (before the Leaf was introduced). Doesn't seem right to me.
2. Unwinding a joint venture is not a piece of cake. The plant in Japan is jointly funded; I could not find details on the U.S. plant. Parting company with NEC could be hard/expensive
Hmmm. Maybe we'll get a different chemistry then the rest of the world. I couldn't imagine that Nissan would throw in the towel on AESC after how much time (and money) they took to make a cell that didn't "need" thermal management and was relatively inexpensive, but perhaps these cheaper cells and a TMS will work out much better for America.Nissan Motor Co. will adopt lithium-ion batteries produced by Hitachi, Ltd., a non-affiliated company, for its eco-friendly model to be marketed in the United States for 2013, Nissan officials have said.
A 'lower capacity' battery for the Leaf hardly seems like a good idea in the U.S. anytime, and especially not now. Maybe the same capacity as now, with more from the higher end? On second thought, never mind. Until there's hardware to examine or Nissan says something official, it's all idle speculation.RegGuheert wrote:I'm going to predict that the Hitachi batteries are not replacements for the current batteries in the LEAF, but rather are for the new lower-cost, lower-capacity entry-level LEAF that has been rumored.
I am going to suggest that the new, cheaper Hitachi batteries will be in place of the current batteries, which were found to be over-engineered and more reliable than needed.RegGuheert wrote:I'm going to predict that the Hitachi batteries are not replacements for the current batteries in the LEAF, but rather are for the new lower-cost, lower-capacity entry-level LEAF that has been rumored.
Agreed. I don't think such a car is intended for the U.S. market.GRA wrote:A 'lower capacity' battery for the Leaf hardly seems like a good idea in the U.S. anytime, and especially not now.