71–80 of 97 posts
This is a straight up lie right? My car (2017 Honda Accord) has a 500+ mile range on a tank of gas. It'd take over an hour to charge to 500 miles. Even at 15 minutes that's a lie. It takes no more than 2-3 minutes of actual pumping to fill my 500+ mile tank of gas.
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"119 miles of range in 15 minutes" is also nowhere near as fast as an IC car "visiting the pump". It does not take 15 minutes to fill the tank on a normal car. Short of physically swapping out batteries, charging an EC will never be as fast as pouring gasoline into a tank. Transferring that much energy that quickly over wires is ... I don't want to stand anywhere near it. Fillup time is not an are where EC should try…
I never finished school, so correct anything I've got wrong here. Diesel has a specific energy of 48MJ/kg and weighs 0.832kg/L. 48MJ converts to 13.33kWh. My diesel tank will take 70L from nearly empty. I've never timed it, but it's definitely substantially quicker than 10 minutes to fill. So I'm transferring about 776kWh in to my diesel tank in 70 * 0.832 * 13.33 = 776.33kWh So it would take a 1MW charger three quar…
Do people in the US take 15m to visit the pump?
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What if some jerk replaces half his cells with rocks then swaps the pack and you get it? You have to trust the charging station that you’re getting an equivalent pack in trade. Are incentives aligned to ensure that?
Gogoro has been quite successful with this model. The difference, of course, is that a scooter takes batteries small enough to swap by hand.
Chargers already pay attention to charging curves and temperature. Is there really much room for safely charging existing batteries faster?
https://insideevs.com/ionity-debuts-350-kw-ultra-fast-chargi...
Volkswagen probably will be the biggest producer of battery electrics within 3 years. They own 12 car brands (including Porsche and Audi https://www.volkswagenag.com/en/brands-and-models.html). VW also has a stake in Ionity and they own Electrify America and Electrify Canada.
If this charging technique really does work then I imagine VW will license it.
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What are you doing differently? Unless you’re pulsing your charging or otherwise varying the current rapidly, then it seems that all you can really do is vary the current as a function of temperature, state of charge, and maybe some other variables. At the end of the day, if you’re going to deliver energy e in time t, you need average power e/t, and the fancier your curve, the more your peak power will exceed your av…
And to add to these questions - what are the consequences for increasing charging rates? Tesla has made some public statements regarding fast(er) charging (specifically targeting the 350kW Ionity chargers) to the effect that pushing that much power will degrade the batteries far faster for little gain. Edit: > Our technology is able to decrease the irreversible chemical reactions that happen during charging, so that…
That's usually within the domain of the battery management system. There's not much the charger itself can do (there is intelligent communication between EV and charging equipment, but not as granular as the view the BMS has).
Earlier quoted context omitted.
"119 miles of range in 15 minutes" is also nowhere near as fast as an IC car "visiting the pump". It does not take 15 minutes to fill the tank on a normal car. Short of physically swapping out batteries, charging an EC will never be as fast as pouring gasoline into a tank. Transferring that much energy that quickly over wires is ... I don't want to stand anywhere near it. Fillup time is not an are where EC should try…
I never finished school, so correct anything I've got wrong here. Diesel has a specific energy of 48MJ/kg and weighs 0.832kg/L. 48MJ converts to 13.33kWh. My diesel tank will take 70L from nearly empty. I've never timed it, but it's definitely substantially quicker than 10 minutes to fill. So I'm transferring about 776kWh in to my diesel tank in 70 * 0.832 * 13.33 = 776.33kWh So it would take a 1MW charger three quar…
Here in Norway we have more electric cars per head than anywhere else and most people wake up to a fully charged car.
It is really rare to need to charge the car at a public charger unless you have nowhere off road to park your car. What is most needed in most places is somewhere to charge the car overnight or while you are at work. Such chargers need no new technology, no extra infrastructure beyond a simple socket in a post beside the road or in each parking space in car parks.
Why don't we just do removable batteries?
It appears that it's for some of the same reasons why people don't want to just swap their car - when you have a large asset that can be in a variable condition, you don't really want to be swapping it for another one randomly.
Super skeptical here, or at least the wording is misleading as hell. > The product allows users to charge a 60kWh EV battery pack with 119 miles of range in 15 minutes as compared to 15 miles in 15 minutes today. > The technology works with off-the-shelf lithium ion batteries and existing fast charge infrastructure by integrating via a patented self-contained adapter on a car charge port First read says that they're…