3 ms·
From the donutlab page: > It can be charged to full in just five minutes without limiting charging to 80%, and supports full discharge safely, repeatedly, an
by cloudfudge 9mo ago
From the donutlab page:
> It can be charged to full in just five minutes without limiting charging to 80%, and supports full discharge safely, repeatedly, and reliably.
From the motorcycle youtube video[1]:
> delivers up to 370 miles (600 km) of range and adds up to 186 miles (300 km) in under 10 minutes
One is claiming 100% in 5 minutes, and the other is claiming ~50% in 10 minutes. Why are their claims so different?
[1] https://www.youtube.com/watch?v=cy_mXYItqXU https://www.youtube.com/watch?v=cy_mXYItqXU
- ZeWaka 9mo agoTemperature thresholds, maybe the bike has active cooling?
- cloudfudge 9mo agoOr maybe swags since this is vapor. I look forward to finding out.
- notjes 9mo agoTo charge the average Tesla in 5 minutes you need about 1MW and cables as thick as a forearm.
- slaw 9mo ago1 MW chargers don't look any bigger than standard chargers. https://insideevs.com/news/761403/byd-thousands-megawatt-chargers-china/ https://insideevs.com/news/761403/byd-thousands-megawatt-cha...
- nine_k 9mo agoThe thickness of the cables is often due to their water cooling. Transferring 1 MW at 99.9% efficiency means 1kW escaping as heat.
- deleted 9mo ago[deleted]
- Alex2037 9mo agothat depends. transferring 1 MW at 1 MV produces very little heat
- Thorondor 9mo agoYes, but a car can't use electricity at 1 MV and converting the megawatt back to something lower than 1 MV still produces a lot of heat.
- nine_k 9mo ago1 megavolt means huuuge spark gaps, I'd say no less than 20", given dry air. This also means very thick insulation, very bulky and expensive switches and breakers, etc. Tesla 3MW charger uses 1250V DC: https://en.wikipedia.org/wiki/Megawatt_Charging_System https://en.wikipedia.org/wiki/Megawatt_Charging_System Liquid-cooled charging cables are a thing. too; one of many: https://www.mouser.com/new/phoenix-contact/phoenix-contact-500a-liquid-cooled-charging-cables/ https://www.mouser.com/new/phoenix-contact/phoenix-contact-5...
- loeg 9mo agoVehicle battery packs are 400-800V today; not 1MV.
- jfengel 9mo agoThat's about the same as a hair dryer. Maybe I can save time by charging my car and setting my 'do simultaneously.
- deleted 9mo ago[deleted]
- MBCook 9mo agoDon’t bigger batteries allow faster charging because they can absorb current faster? Perhaps the problem is the size of the battery being limited in a motorcycle.
- bee_rider 9mo agoThe first quote gives it in terms of the capacity, “to full,” and for the second cloudfudge has helpfully computed that for us.
- jimt1234 9mo agoIt could just be me, but that video looks like AI.
- tzs 9mo agoOne is what the battery is capable of given a favorable environment, the other is what you can get in the environment of that motorcycle? If might be for example that in the motorcycle the battery or the other components that have to handle the charge current cannot dissipate heat fast enough to allow charging with the maximum current the batter allows. In an EV the pack shape probably has a higher surface area to volume ratio making it cool better, and an EV might also be able to actively cool it.
- sroussey 9mo agoVerge motorcycle said they made it longer on purpose... I dunno why. Their larger battery size charges faster. They may have done some stuff to save money on the smaller 10min charging version, and maybe not as much money saving on the larger battery that charges faster.