InnerworldChinese carmaker, BYD, introduces new battery technology with 621-mile range, 620K-mile lifespan, 5-minute charge, and lower prices
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
This is one of those rare situations where reading the fucking manual article helps:
A standard home charger trickles power overnight at roughly 7 kilowatts, like a garden hose. A Tesla Supercharger—long considered the gold standard of public fast-charging—maxes out around 250 kilowatts. BYD is unleashing six times that amount of energy, effectively hooking the car up to a high-pressure municipal water main.
During a live demonstration onstage, BYD plugged in its new Han L sedan, making the battery jump from 10% to 80% capacity in exactly six minutes and 30 seconds.
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.
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)
dindonmaskerWasting energy how exactly? Idk how efficient capacitors are in general.
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.
vext01All 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.
Assuming electrochemical, thermal inefficiencies?
AnUnusualRelicThe 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.
I believe those chargers are battery to battery, not grid to battery. You don’t need 2.5Mw connection directly to the charger. You charge the charger’s battery at normal speed and then pump it into the car rapidly. This means that you can charge only couple of cars in a row at that speed.
That should work. But it sucks when you’re in the third car.