According to reports in The Wall Street Journal and Japan’s Chunichi Shimbun, Toyota is in the “production engineering” stage of building an electric vehicle (EV) battery with a solid electrolyte. Reports suggest the new battery will debut in Japan in a model 2022 car with an all-new platform.
So-called “solid state” batteries have both solid electrodes and solid electrolytes. Solid-state batteries can be made smaller and lighter than the lithium-ion batteries that currently power electric vehicles, but engineering such a battery at an attractive price point for mass production has been a challenge. The Chunichi Shimbun reported that Toyota’s battery will be able to charge in a few minutes and have a long range, but the article did not list specifics.
A solid-state battery would also reduce the fire risk that comes with lithium-ion batteries that use a liquid electrolyte. And, because the electrolyte wouldn’t be in danger of freezing, it could withstand a wider range of temperatures.