On 26 Jul 2021 at 9:06, Steve Clunn via EV wrote: > If your 12v alx battery is going bad it could be pulling power from the DC to > DC converter and draining the traction battery down more than usual.
Well said, and quite possible. I had that happen to an EV in storage many years ago. I'd neglected to open the main breaker when I garaged it, so the DC:DC was still floating the house battery. The house battery developed a shorted cell. The DC:DC was set at 6-cell float, not 5-cell, so it kept pouring its current limit into the house battery, even when the traction battery's voltage fell too low. When I went to drive the EV again, it had a trashed house battery, a flat and sulphated traction battery, and a failed DC:DC. Lesson learned. This recollection makes me wonder whether production EVs are designed to guard against such failures. With all the computer power they have on board, you'd think it would be easy to add a few pages of code to recognize that kind of fault and shut everything down. 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 = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = I really hate this darn machine I think that I will sell it It never does quite what I want But only what I tell it = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = _______________________________________________ Address messages to [email protected] 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
