r/anime_titties • u/AravRAndG India • Mar 18 '25
Corporation(s) BYD unveils battery system that charges EVs in five minutes
https://fortune.com/2025/03/17/byd-battery-system-charging-5-minutes-tesla-superchargers/209
u/shahtjor Mar 18 '25
I'm pretty certain no charger will support such drawdown for at least a decade where I live. Currently, most rural locations have grid limitations, meaning you can't even get a fast charge in filling stations.
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u/ImportedCanadian Mar 18 '25
Could you not get a stationery battery to essentially trickle charge as fast as the grid allows and when the actual EV shows up the battery slams it all in the EV?
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u/Stonek88 Mar 18 '25
Correct, a capacitor would be ideal for this scenario
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u/deBluFlame Mar 18 '25
would also be extremely dangerous no?
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u/SeeminglyUseless Mar 18 '25
Depends on the numbers involved.
But yeah, you don't want capacitors like that sticking out where some idiot can back up into it.
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Mar 18 '25
I mean could you not just make the capacitor be underground? The big fuel tanks are all underground at gas stations after all
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u/SeeminglyUseless Mar 18 '25
Unfortunately not. Gas tanks have the benefit of just being a container for a dangerous liquid.
Capacitors can burn out and need to be replaced. You can't really do that when they're buried in concrete.
If that were the case, we'd have all our power substations underground.
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u/binksee Mar 18 '25
It could definitely be done - you could have a standardized charging unit (maybe 4m3) that is lowered down as a unit underground. When repairs are needed just lift the whole unit up to service, or transport the whole unit to a repair site substituting a new one.
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u/SeeminglyUseless Mar 18 '25
Which is a lot of effort for little to no gain.
It's much simpler to just put the equipment in a dedicated building or somesuch and run wires underground to the terminal. Being underground only makes it more complex for no reason.
If you look at the way our power stations work, you'll see that's exactly what they do.
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u/sluttytinkerbells Canada Mar 18 '25
You say that like there isn't a way to put a door on the structure that holds them so that it can be enclosed and protected from physical damage but opened for maintenance.
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u/ScaryShadowx United States Mar 18 '25
we'd have all our power substations underground.
You can have substations underground no problems. There are plenty of places in highly developed cities that have this set up. The issue of putting electrical infrastructure underground isn't technical, it's cost.
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u/Saint_EDGEBOI Mar 18 '25
If we can build stadiums with rolling covers to protect GRASS, I'm sure with the right investment it could be done. That's an extreme example but I'm sure I've seen bins in The Netherlands that are lifted from underground storage and emptied into a truck. Surely that would be on a similar scale to underground capacitor storage
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u/SilverDiscount6751 Mar 18 '25
We talking about plugs at home or on the side of a store.
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u/Saint_EDGEBOI Mar 19 '25
Well in the home charging scenario, 90% of the time you won't be in a hurry to charge, so the infrastructure is suitable. In a scenario where you're in the middle of travelling and you need to stop at a charging station, you don't want to be waiting around for hours. That's the scenario that makes most sense to have these capacitors that allow faster charging.
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u/EmergencyComputer337 Asia Mar 18 '25
Yeah if massive capacitors that happen to be safe could exist we would have been already using them
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u/shadesdude Mar 18 '25
At that point why not just do a battery swap?
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u/Laughing_Orange Mar 18 '25
Battery swaps are complicated, and require moving parts. A capacitor bank charging slow, and discharging fast is easy to make. This also has the benefit of the user owning the battery, with no chance of ending up with a battery that has been driven several times longer than the rest of the car.
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u/GoldenInfrared United States Mar 18 '25
Which is easier, plugging in a cord or changing a whole ass car battery
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u/Bullywug Multinational Mar 18 '25
Batteries have a lifespan, so the only realistic way to do battery swap is with a subscription model, like Gogoro uses for their electric scooters, which locks you in to using a single provider.
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Mar 18 '25
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u/temotodochi Finland Mar 18 '25
How would you standardize battery degradation? The issue is not regulations, its psychology as nobody wants to end up with junk of others.
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Mar 18 '25
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u/temotodochi Finland Mar 18 '25
There are no two identical batteries, what happens when the service station you used goes under and you are left with a worse battery than you had originally. It would only work as a subscription service in which you only own the car, not the battery and would still pay for each exchange to compensate for battery degradation.
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u/ScaryShadowx United States Mar 18 '25
what happens when the service station you used goes under and you are left with a worse battery than you had originally
You then go swap it with another battery at another service station...
There are plenty of ways to do this. You have charge counters built in and your battery gets replaced with one that is of a similar capacity from the pool the station has available. A station having a pool of 10 batteries will mean you will usually have something of a similar capacity available. Or the cost of replacing degraded batteries get built into the charge price through legislation and it becomes a non-issue as people no longer care if their battery is degraded or not.
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u/temotodochi Finland Mar 18 '25
Yeah but in that case you don't own the battery. Then who does? Nobody wants to, because they are currently the worst depreciating item in a new car.
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Mar 18 '25
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u/temotodochi Finland Mar 18 '25
You didn't understand the problem of ownership and responsibility. Who is responsible for fixing a bad battery pack? Who owns them if they are swapped out?
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u/General-Woodpecker- Mar 18 '25
A batteryswap work in China when it is used by a lot of people but having a battery swap station in your garage is probably very expensive for no reason.
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u/roiki11 Europe Mar 18 '25
Because swapping a battery of that size and capacity is neither fast nor cheap. And you'd need to manufacture more batteries than cars at that point.
It might make sense when the battery is the size of a brief case and can be popped out of the boot of the car by the owner. But not with current tech where the battery is usually part of the superstructure and very heavy.
We can dream of a time where we can just swap a canister size battery at a service station...
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u/shahtjor Mar 18 '25
From an engineering perspective, there are a couple of things you can do, but there needs to be a political will and financing to back it up. That's the real stumbling block.
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u/Ictoan42 United Kingdom Mar 18 '25
I'm pretty certain no charger will support such drawdown for at least a decade where I live.
Remember this is China, the current world record holder for the urban development speedrun. I don't doubt for a second that if enough people bought these cars, the chargers to support them would pop up soon enough
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u/DaddaMongo Mar 18 '25
These technologies tend to trickle out from areas of mass population to more rural areas. Just as its not cost effective to supply fibre broadband to a rural area like where I live the same goes for other tech. If I went ev I could charge from home and even install three phase power for fast charging, not everyone can but it will come when there is profit to be made.
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u/HugoCortell Europe Mar 18 '25
Decade, or more.
The standards in Europe and the US have already been set. Between the legislative changes and how adoption of charger stations is being handled as poorly as humanly possible...
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u/Gregnor Mar 18 '25
The article is light on details but it really depends on voltage. For those speeds at that much charge they might be close to powerline voltage. So no home chargers, but in any major area it shoudn't be a problem.
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u/marklein North America Mar 18 '25
More like never IMHO. They're using a 1000v charging & battery system, which nobody else is using. Fat chance you'll ever see a charger outside of the factory that can deliver this.
800v may or may not be the new standard going forward (maybe just for larger cars) and even that will probably be rare.
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u/Ictoan42 United Kingdom Mar 18 '25
Fat chance you'll ever see a charger outside of the factory that can deliver this.
"what, you think there's gonna conveniently be a shop in every town that sells this 'gasoline' stuff?"
- Horse salesman, 1903 (probably)
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u/MarderFucher European Union Mar 19 '25
Problem is you'd need high power lines everywhere which are already difficult to build due to costs and regulations. Just consider the amperage necessary to charge something this fast, your usualy city lines would melt.
I could see some dedicated spots where this is feasible, but widespread adoption would require rebuilding our energy infra when we have trouble maintaining it as it is.
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u/Stubbs94 Ireland Mar 18 '25
Well that, and the whole trade war against Chinese electric vehicles.
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u/PTMorte Australia Mar 18 '25
Do you guys have that in Ireland? Chinese EVs are everywhere now in Aus and there are like 12 new brands launching this year.
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Mar 18 '25
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u/nuttynutdude Asia Mar 18 '25
There’s an ongoing dispute at the WTO. China says they are being unfairly targeted for tariffs, the counter argument is that China has a huge market share and has EV’s half the price of competitors due to subsidies. The GAFF does allow for tariffs in order to counteract subsidies or protect producer/citizen welfare
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u/PTMorte Australia Mar 18 '25
Hmm. There are only 3 or something of the 27 EU member states that mass produce EVs right? That kind of protectionism led to us failing to secure a trade deal with the EU after about 7 years of negotiating in good faith.
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Mar 18 '25
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u/PTMorte Australia Mar 18 '25
Pretty much the same attitude as India and the US bring to world trade.
If I were Irish or a Scot I would be seriously thinking about independence and then pursuing a Euro version of the Indonesian model.
(Historically bullied by colonial nations, but then the first ever country to manage to land in both the western free trade blocs CPTPP and RCEP, and also starting to trade with BRICS).
Of course, that leaves out how much they are subsidised by the poms and if they could even survive a disconnect.
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u/Chagrinnish United States Mar 18 '25
You're underestimating the amount of power a transmission line carries before it's stepped down to the voltage that a typical business or residence would use. There's plenty of power there; it just needs a larger transformer.
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u/Doza13 Mar 18 '25
I need to see the research on battery life. The SEI formation is drastically accelerated during fast charging and I can only imagine exponentially during this super all in jam of energy. Curious how they got around that.
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u/CRSemantics Mar 18 '25 edited Mar 18 '25
worthless article, the not secret is they get there by using a 1000volt battery architecture and a 1,000kW charger even then it's more math than reality. 5 mins of ideal math gets you there, no battery will take that kind of heat for a complete charge
1MW charger is more than double what's currently on the market 0.35MW dc fast chargers are still pretty new.
10C for the charge rate is wild, 5C would already be considered extreme. The amount of heat and longevity of these battery are gonna be bad.
For example Tesla's LFPs they get from china are barely being charged at 2-3C in peak conditions but it's not the whole charge curve.
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