4 ms·

>I’m curious what voltage the pack runs at and how long it would take to charge. Many of these types of aircraft operate in FAR Part 135 on-demand operations. A

>I’m curious what voltage the pack runs at and how long it would take to charge. Many of these types of aircraft operate in FAR Part 135 on-demand operations. Aircraft and crew utilization are crucial for the business model. This is the number one question I had as well, for the same reasons. Porsche has a 1000V system in their new Taycan EV, so I'd assume they're at least at that level. At 900kWh, a system like that could charge from 10% (assumed minimum reserve) to 95% (Batteries are never really charged to 100%) in under 2 hours @ 400KW, which is about the power level of the beefiest EV chargers being developed right now. More likely they will have swappable batteries, which makes a lot more sense from a thermal management point of view as well. You can either load up the pack with all kinds of cooling and deal with the added weight, or just make it passive air-cooled and swap it out between flights before it gets too hot.

technofiend 8y ago
In my humble opinion swappable batteries on an airplane would run afoul of the maintenance regulations that require an A & P to perform and sign off on changes to the aircraft.
- Robotbeat 8y ago
  Correct.
- aphextron 8y ago
  >In my humble opinion swappable batteries on an airplane would run afoul of the maintenance regulations that require an A & P to perform and sign off on changes to the aircraft. Pipistrel Alpha, the only real production electric plane shipping, is using swappable batteries. There's really no other viable way with current technology to have reasonable recharge times.
Robotbeat 8y ago
Will not be swappable as that would add too much weight.
justin66 8y ago
> At 900kWh, a system like that could charge from 10% (assumed minimum reserve) to 95% (Batteries are never really charged to 100%) in under 2 hours @ 400KW, which is about the power level of the beefiest EV chargers being developed right now. There's no particular reason charging a big, multicell battery needs to bottleneck on a single charger. (is there?) It's done with cars for what I always assumed were cost and convenience reasons.
tristanb 8y ago
0 volts. See my other comment its a scam. https://news.ycombinator.com/reply?id=18620766&goto=item%3Fid%3D18602771%2318620766 https://news.ycombinator.com/reply?id=18620766&goto=item%3Fi...

technofiend 8y ago

In my humble opinion swappable batteries on an airplane would run afoul of the maintenance regulations that require an A & P to perform and sign off on changes to the aircraft.

Robotbeat 8y ago
Correct.
aphextron 8y ago
>In my humble opinion swappable batteries on an airplane would run afoul of the maintenance regulations that require an A & P to perform and sign off on changes to the aircraft. Pipistrel Alpha, the only real production electric plane shipping, is using swappable batteries. There's really no other viable way with current technology to have reasonable recharge times.

Robotbeat 8y ago

Will not be swappable as that would add too much weight.

justin66 8y ago

> At 900kWh, a system like that could charge from 10% (assumed minimum reserve) to 95% (Batteries are never really charged to 100%) in under 2 hours @ 400KW, which is about the power level of the beefiest EV chargers being developed right now. There's no particular reason charging a big, multicell battery needs to bottleneck on a single charger. (is there?) It's done with cars for what I always assumed were cost and convenience reasons.

tristanb 8y ago

0 volts. See my other comment its a scam. https://news.ycombinator.com/reply?id=18620766&goto=item%3Fid%3D18602771%2318620766 https://news.ycombinator.com/reply?id=18620766&goto=item%3Fi...