this post was submitted on 07 Mar 2026
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What the fuck does 5 minute charge mean? Zero to full in 5 minutes? For that big of a battery I believe that is not physically possible
All EV batteries aren't "a battery that size". They're a bunch of small batteries all strung together. The "battery that size" statement you made is pretty much meaningless.
It's very much physically possible to charge a battery pack at mostly empty to mostly full in 5 minutes. The tech and chemical side of actually getting it done hasn't quite officially happened yet. Battery charge\discharge rates are measured in "C". One C is an hour for a 0 to 100% charge. So six C would be 0 to 100 in 10 minutes. That's doable right now. You'd need 12 C for a 0 to 100% charge in 5 minutes. That has happened yet, but it's getting pretty close. 11 C can be done to go from 0 to 80%.
Likely, BYD's charging statement is based for the regular layman such as yourself and refers to something along the lines of a charge from 10% up to 80%.
As a side note, it's also annoying having these "new EV battery has x amount of range" is dumb. You could get that range 20 years ago if you made the battery pack a lot bigger. What you need to know is the energy density and the size. Like 400 WH per kilogram is currently a really good capacity. Double what you could get from like five years ago.
Which part of physics prevents that exactly?
The main problem is having a charger with enough power to fill the battery that fast. But it's more of an infrastructure problem.
Also the numbers given are usually for a 80% charge. I don't know if it's the case here, but probably.
Assuming electrochemical, thermal inefficiencies?
This is one of those rare situations where reading the fucking ~~manual~~ article helps:
The amperage to do that is insane, either you're dumping power from town sized feeder lines (seriously limiting where you can place those chargers) or you are charging capacitors to charge the car (wasting energy and limiting how often you can charge a car at those speeds)
They use battery banks, so the system can charge slowly without overloading the grid and charge the car quickly. But the user will pay more for charging that fast. I'd expect to have much more slower chargers and few of the fast chargers. Most supermarkets these days have a charger these days, so if you're not in a rush you can just shop and charge.
Wasting energy how exactly? Idk how efficient capacitors are in general.
What comes down to 430 miles, or about 6 hours of highway driving. It's made for the crowd that does a road trip a few times a year and really wants to drive non stop. Or those living in an apartment just want to charge once in two weeks.
Another question: is how many charge / discharge cycles are possible?
Usually the faster you charge a cell, the fewer times you can do so.