Re: Batteries - EV Conversion

"Bob La Londe"  wrote in message news:vsv0j0$24fdh$1@dont-email.me...
I was thinking something as simple as 4-48V prebuilt modules/batteries
in parallel each with its own BMS.  Something like the LiTimes 48V
batteries.  They state its okay to run up to 4 in parallel.  A fuse to
each battery might cure the shutdown/overload, but those units have
their own peak overload internally in the BMS.  Thermal shut down as
well.  Its one of the reasons I was looking at the LifePo batteries
available off the shelf.  Lots of them with thermal shut down and peak
load shutdown.  Just check the reviews to see which ones actually work.
LOL.  Prouse does a good job of reviewing batteries on his YouTube
channel.
The Hyper9 which is really at the bottom of the EV motors I'd consider
really likes to have available 100+ volts (144 if I recall).  Not an
options with the prebuilt LiFePos.  None of them seem to be rated to run
enough in series to get that.  The bigger motors all seem to be 400V+.
Bob La Londe
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I've done enough with EVs to know I'm not qualified to design one fit to mix with traffic on public roads, or to properly design the power steering and power antilock brake accessories. I had trouble with the hydraulic lift for my bucket loader. The electric motorcycle for (???) was at my limit. I can only test and maybe modify/repair those things under an engineer's supervision. Sorry.
The mathematics of the Segway brushless motor drive is worthy of NASA, I know because I've been exposed to both and studied it in night school.