On 13 May 2018 at 4:30, Lawrence Rhodes via EV wrote: > Interesting information on Nickel Iron batteries. > http://www.nickel-iron-battery.com/
AFAIK, and battery experts can correct me if this is wrong, nickel iron batteries have a few weaknesses. One is mediocre charge efficiency. Their gassing voltage is low, so a fair bit of the energy put into them goes into breaking down the electrolyte's water into hydrogen and oxygen. Also, as that suggests, they need really good ventilation to be safe. They're not particularly high in specific power, either. However, they do have a reputation for very long cycle life. If I'm not mistaken, the "metal" in nickel metal hydride batteries is iron. So you could say that in a way, Edison's batteries have actually been quite successful. It's just that NiMH haven't much found their way into EVs. I don't think that's because of any particular failing, rather it's thanks in no small part to the GM/Texaco/Cobasys NiMH patent encumberance. Not that I mean to absolve any of those corporations, but it's too bad that Stan Ovshinsky wasn't more canny in dealing with GM. David Roden - Akron, Ohio, USA EVDL Administrator = = = = = = = = = = = = = = = = = = = = = = = = = = = = = EVDL Information: http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to "evpost" and "etpost" addresses will not reach me. To send a private message, please obtain my email address from the webpage http://www.evdl.org/help/ . = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
