The Battery That Refuses to Explode | NOVA

With solid state batteries you can puncture them, cut them, and shoot them with a bullet. It's much harder to make them catch fire and they keep working: ▶ this video link

Yes. An example is a bullet test of ProLogium's solid state battery: link Another example is a scissor test of Ionic Maerials' sold state battery: ▶ this video

Solid state batteries tend to be safer than other batteries. Here is ProLogium's solid state battery failing to fail after it's been shot with a bullet: link Here is Ionic Materials' solid state battery failing to fail after it's been cut with scissors: ▶ this video

> emergency crews can spray water on the battery Here's what happens when you spray water on the battery: link > every battery cell could have a built in discharge circuit A better idea is solid state batteries. They can be damaged without catching on fire: ▶ this video link And explosive fuses can be used to disconnect the battery automatically after a crash: link

The really important bit, comparison to lithium ion: >She did say that large battery banks that might be spun off from this research stand to not only have higher capacity, but also be substantially lighter than lithium ions. Although, she adds, perhaps the greatest weight savings will come not from comparing one battery cell's mass with another. “The biggest difference would be that you don’t have to have the same stainless steel bunkers in each of the cells,” she says. Not flammable is a big deal in battery tech. We try to pack more and more energy into smaller and smaller cells, so continuing to improve the capacity makes inadvertently releasing all that energy even more dangerous. Here's another cool project working on that problem with a solid polymer electrolyte. Video shows it continuing to provide power while being sliced into pieces with scissors: ▶ this video

The next step for batteries is making solid-state batteries work commercially for their superior energy density and safety: ▶ this video 24M has developed what they call a semi-solid-state battery and have delivered batteries with a capacity of 280 wh per kilogram: link They think they can get to 350 wh/kg by 2020, which is a dramatic improvement over current EV batteries.

Why settle for mediocre batteries? EV battery packs are still catching on fire in scenarios where they shouldn't have: link We can do better on batteries and solid-state batteries are clearly safer: ▶ this video

Yes, but the reason for fire is the liquid electrolyte. Lithium batteries don't have to catch fire. A short clip from PBS Nova: ▶ this video

Yeah a lithium-ion battery that doesn't catch fire and may be able to double energy density from PBS Nova [1] though I don't think the clip talks about energy density. 1. ▶ this video