Surur t1_j6hwf8n wrote on January 30, 2023 at 1:25 PM

So apparently Heart Aerospace is partnered with Northvolt's Cuberg whose solid electrode Lithium-ion cell energy density has been validated at 380 Wh/kg.

https://northvolt.com/articles/cuberg-july2022

> But he is confident improvements in battery density will happen, and quickly. For example, cell manufacturer Cuberg is already working on next-generation battery technology that promises better energy density at lower cost. Cuberg has several links with Heart: it is a supplier to Electroflight, and in March was acquired by Northvolt, a Swedish battery specialist whose chief executive Peter Carlsson is also an advisor to the aircraft manufacturer.

> Forslund points out that the requirement to change battery packs after they have been through a certain number of cycles means that operators will, in effect, “get a better aircraft on a yearly basis”.

> That energy density improvement will also enable Heart to develop a larger future aircraft of “approaching 50 seats”, although Forslund is keeping mum on the timeline.

allnamestaken1968 t1_j6klsrw wrote on January 31, 2023 at 12:04 AM

So far, we don’t have battery packs that have the energy density, max output, fast charging, and longevity that would allow for anything in passenger flight. It just doesn’t exist. “Replacing batteries every few cycles” sounds horribly expensive. You would also have a range approved based on battery life. You need distance+circling+ going to other airport plus at one go around. It just isn’t going to happen with any battery tech we know of, and it’s unlikely for hydrogen planes with more than about 20 people for about 200 miles