So the idea seems far too simple to work but, here goes since I certainly don't have the ability to develop it & would love to see it.
We have gel batteries they're full of a , gel it's highly viscuous which makes it an ideal shock absorbing medium. What? Yeah I know but, think about those stress balls. When I was selling insurance (poorly, one of the deepest regrets of my life) I would grab my stressball, squeeze it tight, then hit the desk & whack it like a mole with the telephone. Now I imagine if I did that everyday for any extended time it might not be good for my bladder. No not my own, well maybe my own. Any way the gell dissipates the force & the bladder that contains it absorbs the rest by expanding, how much it expands depends on the nature of it's membranes. How much shock it can absorb if 1st dealt to the gel which if I understand my physics well enough can actually use the physical jarring of the gel to reenergize it to some degree.
The problem is keeping them from exploding under normal, extreme or impact use. & I think creating a piston box that will flatten the ring but, not exceed it's tolerances nor constrict it too much. What I like about it is if it leaks, a common problem for engines, it's a gel that might even be biodergadable but, either way it'll be far slower absorbing & far easier to clean up with no splatter or vapors. Leaking is not a serious concern because I think it could be addressed & would be noticed early enough that it wouldn't contaminate the world unless the vehicle were smashed to smithereens on the nose of a train, hit by a plane, crashing off a giant cliff like in the movies & bad TV. I think it's totally doable & if I understand the state of things if the top plate of the piston box were to heat up there's now a way to convert that directly into energy to either supplment systems or feed back to batteries, add in solar panels & regenerative braking & you get more out of every paid watt. Along with a new way to incorporate batteries into the vehicle. I'm fond of the idea of a liquid propane mircro turbine assisted electric vehicle, it runs on electricity but, you have to extend the range beyond what even the most efficient batteries can provide. I like Gasses because as I understand it they're highly interchangable & methane is becoming a viable resource along with more "natural gas" & then there's always propane. I like the turbine as a charger because it operates at such high efficiencies & has exceptionally low maintenance costs with a very reasonable maintenance schedule often 6-10000 hours of operation.
Lithium batteries are tempermental in that they're expensive & if you don't recharge them at the right time in their discharge cycle it decreases their life span & imacts their power curve. So Ideally you show up at home every couple or few days with the turbine running & plug it in to shut the turbine off & sip from the grid. Theoretically this system could be used to also power a small home at a very high efficiency with the vehicle turbine providing the power more efficiently than the local energy providers & achieving maximum use out of your expensive batteries.