4 ms·
Overlooking the cell chemistry issue... ... you cannot just dump unlimited current through a superconductor. Once you exceed the critical current density, your
by inportb 3y ago
Overlooking the cell chemistry issue...
... you cannot just dump unlimited current through a superconductor. Once you exceed the critical current density, your superconductor becomes a regular conductor.
- mytailorisrich 3y agoAnd in any case whatever power source you're using cannot deliver infinite power.
- tmpX7dMeXU 3y agoWho said infinite power?
- qsdf38100 3y agoIt's implied by instant charging. The power would be the battery capacity divided by 0.
- deleted 3y ago[deleted]
- sharlos201068 3y agoNo one means literally zero time to charge. A couple seconds compared to minutes or hours is virtually instant for practical purposes.
- qsdf38100 3y agoLet me keep being pedantic and notice that a typical phone capacity of 10000 Joules divided by 2 seconds is still 5 kW of power, so not a trivial amount. I'd think 30 seconds (333 Watts) is more realistic.
- Denote6737 3y agoIf we can even get the charge times for EVs down to the minutes to take to refill ICE tanks. It will basically remove the range anxiety problem.
- mytailorisrich 3y agoBest way to get EV 'refill' time to minutes is battery swapping. This already exists commercially, see Nio in China, and it apparently takes as little as 3 minutes. Similar speeds for charging are impractical because of the power spikes required even if the battery could take it. You cannot have instant charging, that's not pedantic, that's the discussion, and in any case there is a practical limit to how fast it can happen for similar reasons. All the work being done on smart home EV chargers that automatically schedule the right time (controlled by grid) to charge overnight are because even at current speeds this wreaks havoc on the electrical subsystems and grid if everyone plug their EVs in at the same time in the evening...
- Denote6737 3y agoI personally don't have a problem with the current 30 minute charge. If you drive you should stop for 20 to 30 minutes every couple of hours. What we need is sufficient infrastructure for ev charging.
- soligern 3y agoThat’s pedantic. No one means literal instant charging, just figuratively.
- galangalalgol 3y agoAlso the thing will be a really strong magnet while it is storing energy. Even if it doesn't rip itself apart it will stick to stuff amd lose energy.