On 17 Jun 2015 at 8:17, Willie2 via EV wrote: > I have a battery that looks to be a direct replacement coming from > China. I don't want to fool with a battery that does not conform to > the form factor of the original battery.
"Looks to be" sounds a little discomfiting. I hope you get what you expect. I see a lot of questionable generic lithium batteries going at tantalizingly low prices on Ebay and the like, but my caution always kicks in: you don't always get what you pay for, but you very seldom get what you don't pay for. > My golf carts, with 100ah LFP cells and miniBMS have been FAR too > costly to maintain. Can you be a little more specific here? What makes them so expensive? > I've been toying with "lead replacement" batteries that protect > themselves from over charging and over discharging. I've seen those advertised. They reminded me of the Valence batteries that were made in marine battery form factors and designed to be charged with lead battery chargers (they had internal BMSes which supposedly could "translate" the lead charging algorithm). Somehow I had the impression that these much cheaper and smaller batteries were meant to replace lead ICE motorcycle starting batteries and/or lead UPS batteries, so I didn't explore them any further. THat was quite a while ago, though, so maybe different types are available now. > So, several of those might work in a golf cart and not give me the > repair/maintenance headache I have now. Golf cars are pretty economical and reliable with lead golf car batteries. > I wonder if the bike batteries also protect themselves? Well, they almost certainly have some kind of BMS. However, I'd think it would expect the voltage and current that your stock bike charger produces. If you slam it with a golf car charger, its behavior might be unpredicatable and as pricey as these batteries can be I'd be hesitant to risk it. For sure you'd void any warranty it might have. IDavid 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 For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
