On 26 Jan 2022 at 20:28, Paul Wujek via EV wrote: > https://carnewschina.com/2022/01/23/dongfeng-e70-launched-with-a-solid-state-b > attery-50-demonstration-cars-delivered/
Thanks Paul. That's an interesting piece. It links to another which, to me, is even more interesting: https://carnewschina.com/2022/01/24/solid-state-battery-explained-when-its- coming-to-mass-production/ Shortcut: https://v.gd/CKxtap That one is written for the layman, with a fairly comprehensible discussion of the technology. However, as one such person, I have no way to evaluate its accuracy, or to judge whether its optimism is justified. It mentions lithium polymer construction as originating in the late 2000s. That was the first red flag for me. I recall reading about lithium polymer batteries much earlier than that. If memory serves, it was in the late 1980s. What I read then was, like this article, brightly optimistic. Lithium polymer was claimed to be the EV battery we were all waiting for. And then like so many other miracle EV batteries, lithium polymer faded from EV discussion in the years that followed. So perhaps y'all can forgive me for being skeptical. The other revelation in the linked article is that the Ganfeng/Dongfeng battery "most likely" (?) isn't a true solid state battery, but still uses some liquid electrolyte. The writer admits that "real SSB´s using Li-OH are probably at least five years away." To me, again as a layman and longtime EV observer, that's another red flag. I couldn't count the number of highly promoted alleged battery innovations that have been 5 years away. The discussion of lithium sulfur batteries also brought back memories of sodium sulfur batteries (I know, not the same thing). I read about Ford's development of NaS batteries around 1967. Ford sold the rights (to ABB maybe?), but tried them in a fleet of prototype small vans in the early 1990s. They had an unsettling propensity for catching fire, bringing that project to an early and abrupt end. Clearly lithium sulfur is different but the safety and production obstacles still sound quite formidable. Getting back to the not-quite-solid electrolyte batteries discussed in the first article, Dongfeng has built 50 cars with what are essentially limited- production experimental batteries. And they're not even radically improved in performance, but rather are an incremental improvement on existing lithium ion batteries. I'd like to hear from someone with long term expertise in this arena, someone who has a perspective on whether this is as big a deal as is claimed. To me - again the skeptical layman - this doesn't seem like a world-changing development - at least not yet. David Roden, EVDL moderator & general lackey To reach me, don't reply to this message; I won't get it. Use my offlist address here : http://evdl.org/help/index.html#supt = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Authoritarianism begins when we can no longer tell the difference between the true and the appealing. -- Timothy Snyder = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ Address messages to ev@lists.evdl.org No other addresses in TO and CC fields UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub ARCHIVE: http://www.evdl.org/archive/ LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
