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| Solid state batteries, vaporware or the future of electric vehicles? |
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| coppice:
--- Quote from: NANDBlog on December 22, 2020, 05:56:24 pm ---Mercedes already sells a bus with it. Bus is easy, you dont have to integrate it, as it is just a "box of batteries": https://media.daimler.com/marsMediaSite/en/instance/ko/Immediately-before-the-rollout-the-new-fully-electric-articulated-bus-the-Mercedes-Benz-eCitaro-G-with-innovative-solid-state-batteries.xhtml?oid=47447805 --- End quote --- That's not very impressive. The solid state option has only 10% more capacity that the lithium ion option (the article says 25%, but that's comparing the new solid state battery with an older generation of lithium ion), and cannot be charged quickly. Fast charging is one of the key benefits claimed for most solid state batteries. I couldn't find a mention of prices for the 2 battery options. Those buses put the battery packs on top of the bus. That's an odd place to put so much weight. Buses are usually designed to keep the C of G really low. |
| james_s:
--- Quote from: coppice on December 22, 2020, 05:35:17 pm ---I agree. People have been so whiny about those ads. They clearly describe, in a couple of sentances, what the car actually offers, and a Toyota Atkinson engine plus hybrid drive achieves a fuel efficiency like most diesel cars, but with lower pollutant output. --- End quote --- My partner has a Toyota Prius. It has been exceptionally reliable and it achieves the specified fuel economy, but it is the most boring and soul-less car I have ever driven, it is the very definition of a transportation appliance. It feels ok around town but as soon as you need to accelerate up a hill on the freeway or somewhere else with a relatively high speed limit it just falls flat. My friend has a VW TDI that I have also driven and it is a far superior experience in my opinion. It feels peppy and has good torque, even in higher gears. I've driven several pure EVs that impressed me though, much more interesting than the hybrid and quieter than the turbo diesel. |
| james_s:
--- Quote from: coppice on December 22, 2020, 06:50:31 pm ---That's not very impressive. The solid state option has only 10% more capacity that the lithium ion option (the article says 25%, but that's comparing the new solid state battery with an older generation of lithium ion), and cannot be charged quickly. Fast charging is one of the key benefits claimed for most solid state batteries. I couldn't find a mention of prices for the 2 battery options. Those buses put the battery packs on top of the bus. That's an odd place to put so much weight. Buses are usually designed to keep the C of G really low. --- End quote --- What I'm interested in is cycle life, degradation at elevated temperatures or from sitting in a fully charged state, safety and replacement cost. Fast charging has applications but it isn't something I personally care about. Putting batteries on the top of the bus does seem like an odd choice, but I'm reasonably confident that the engineers know what they're doing and will design the bus so that the CG is in an appropriate location for it to handle safely. Perhaps they can sufficiently reduce the weight of the upper body structure through the use of modern materials to compensate for the weight of the batteries. |
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