Just make sure you size the wire correctly because the current from the larger cell will be more. You might also consider the current rating of the cell and make sure you don't exceed it.
Sent from my iPhone > On Jul 21, 2015, at 8:23 AM, Willie2 via EV <[email protected]> wrote: > > I'm using two parallel 20ah 36v ebike batteries in a golf cart with good > success. I had been working with the mental model that all batteries in > parallel should be of equal capacity. On more careful consideration, I now > see no reason to have equal capacity batteries. That is, I might use one > 20ah and one 60ah in parallel. Can anyone point out a flaw in my thinking? > > I again comment that I am highly optimistic on the possibility of using > chinese ebike type batteries in relatively large EVs. The VERY large > advantage over using a single series of large lithium cells is that the > BMS/protection is built in and integrated. Each battery balances it's cells > and protects itself from both over charge and over discharge. No rats nest > of miniBMS modules to be protected from the elements. And the price is very > attractive. Single lithium cells are priced around $1.20/ah. The ebike > battery equivalent is around $1 delivered in the USA. And as low as about > $.70 in China. Another very significant advantage is the modularity. Bad > batteries can be easily swapped out. Batteries can easily be added for > increasing range and power. > _______________________________________________ > 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) > _______________________________________________ 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)
