Toyota has maintained that putting smaller batteries in HEV’s and PHEV’s, rather than larger batteries in BEV’s, would be a more efficient method to reduce vehicular emissions. This decision has put the company in a dark place with many narrowly focused environmentalists.
Their chief scientist, Gill Pratt, has cited a finite lithium supply as one reason for the decision. The company has also stated a 40 mile EV range for PHEV’s as their ideal target. Recent mandates may up that to 50. Given their previous statements, it is odd that they would even propose, let alone develop, a PHEV with an EV range of 120 miles.
The company has also announced a more “efficient” battery in the near future, that they claim will double the range of current EV’s. I’d challenge the use of the word “efficient” when discussing an energy storage device. Increased battery “capacity” is what will be necessary to increase the EV range of otherwise identical vehicles that are driven in the same fashion.