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Solid-state batteries: Why Toyota's plans could be a game-changer for EVs

Word out of Japan today is that Toyota is working on launching a new solid-state battery for electric vehicles that will put it solidly in the EV game by 2022. Which leads to a simple question: What is a solid-state battery, and why does it matter? Back in February, John Goodenough observed, "Cost, safety, energy density, rates of charge and discharge and cycle life are critical for battery-driven cars to be more widely adopted." And risking a bad pun on his surname, he seemed to be implying that all of those characteristics weren't currently good enough in autos using lithium-ion batteries. This comment is relevant because Goodenough, professor at the Cockrell School of Engineering at the University of Texas at Austin - it so happens, he turns 95 today - is the co-inventor of the lithium-ion battery, the type of battery that is pretty much the mainstay of current electric vehicles. And he and a research fellow at U of T were announcing they'd developed a solid-state battery, one that has improved energy density (which means a car so equipped can drive further) and can be recharged more quickly and more often (a.k.a., "long cycle life") than a lithium-ion battery. (Did you ever notice that with time your iPhone keeps less of a charge than it did back when it was shiny and new? That's because it has a limited cycle life. Which is one thing when you're talking about a phone. And something else entirely when it involves a whole car.) What's more, there is reduced mass for a solid-state battery. And there isn't the same safety concern that exists with li-ion batteries vis-a- vis conflagration (which is why at airplane boarding gates they say they'll check your carryon as long as you remove all lithium-ion batteries). Lithium-ion batteries may be far more advanced than the lead-acid batteries that are under the hood of essentially every car that wasn't built in Fremont, Calif., but as is the case with those heavy black rectangles, li-ion batteries contain a liquid. In the lithium-ion battery, the liquid, the electrolyte, moves the lithium ions from the negative to the positive side (anode to cathode) of the battery. In a solid-state design, there is no liquid sloshing around, which also means that there's no liquid that would freeze at low operating temperatures. What Toyota is using for its solid-state battery is still unknown, as is the case for the solid-state batteries that Hyundai is reportedly working on for its EVs.

New Toyota semiconductors could increase hybrid fuel efficiency by 10%

Toyota may have an ace up its sleeve in the fuel economy wars, as it's developed a new type of semiconductor that will allegedly help the company's hybrids net a ten-percent improvement in fuel economy.
The tech is still in development, although Toyota is already reporting five-percent gains during testing, six years before it plans to implement the new semiconductor in production vehicles, meaning the ten-percent improvement doesn't seem like an untenable goal. That is, until you hear from Kimimori Hamada, the project general manager of Toyota's electronics division.
"We are aiming for great improvement in fuel economy and miniaturization," Hamada told Automotive News. "This is a very challenging target."

We dialed a random Swede, talked about not driving Volvos

The Swedish Number is now a thing. It's a cool thing. You dial, a random Swede picks up, and you chat. Or, in my case, you dial and a random Brit living in Sweden for the past six year picks up and you chat. Since I was calling on behalf of Autoblog, when I got Martin from the small coastal town of Sundsvall, on the phone, we talked about cars, Volvos (natch), and cold-weather testing. Oh, and about plugging in his regular Toyota Prius. ABG: I was able to come to Sweden and test Volvos a month or so ago. Do you drive a Volvo? Martin: [laughs] No. I think Volvo is a fantastic car. It truly is an amazing car, but no. My girlfriend has a company car, so we drive a hybrid Toyota Prius. ABG: And how does that work in the cold winters? It obviously cuts down on the environmental problems. Martin: No problem at all. Because we have these cold winters, like you do get in the States as well, where we park our cars, we've got electricity posts where we can plug in the cars. Motor car engines have a heater, so you can have the heater going for some time before you get into the car. So it warms up the engine and there's a socket inside the car to warm up the inside of the car as well. It's very efficient. You just need to remember to set the timer when you climb out of the car and connect the cable. It obviously cuts down on the environmental problems as well because your car is already warm before you start them. ABG: I know that makes them overall more efficient, I just didn't know it could work with any car. It used to be you would keep the diesel engine blocks warm, but this works for pretty much any car in Sweden? Martin: Yes. Our temperatures here can vary. We do tend to get roundabout -18 to -25C [0 to -15F], where I live, sometimes. Normally, in the winter, we always plug the car in to make it more environmentally friendly, for starters, and then it's a nice warm car when you get in. The coldest I remember it getting here was -36 [-33F]. In the north of Sweden they've had, on record, -56 [-69F]. ABG: That's too cold. Martin: That is cold, yeah. Most countries, now, use the north of Sweden to test their cars because of the ice. Volvo S90 Prototype View 15 Photos ABG: That's actually why I came over there, to test out the new XC90s and S90s. Martin: Is that your job, then? ABG: I don't test the cars for the companies, but I test them for Autoblog. They'll invite us to test the vehicles so we can see for ourselves what the vehicles do in cold weather.