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Comment by cloudfudge

5 days 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

17 comments

cloudfudge

Reply
tzs  5 days ago

One 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.

MBCook  5 days ago

Don’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  5 days ago

    The first quote gives it in terms of the capacity, “to full,” and for the second cloudfudge has helpfully computed that for us.

sroussey  5 days ago

Verge 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.