Thanks for the clarification. Yes, I know that special design on the motor and the transmission can offer more torque for hill climbing at low current draw.
In fact, my own idea is to attach a small powerful lithium batteries (at low cost) to the original lead acid or CALB battery system to offer extra power during hillclimbing and speed acceleration. Will this make any sense ? Jerry On Sun, Jun 9, 2013 at 10:04 AM, Cor van de Water <[email protected]> wrote: > Hi Jerry, > > I am not Al, but I have plenty experience in hill climbing challenges. > My truck weighs about 4400 lbs with its 120V flooded golf cart batteries > (20 of them +2 for the aux) > However, the controller limits the current to about 300A, probably because > the motor has too low inductance > (11 inch GE motor) so the current has high spikes, triggering the current > limit (should be 500A). > The result is a definitely underpowered truck that takes about a minute to > reach max freeway speed. > You can imagine that when I get into the foothills that I need to maintain > speed to reach uphill or > when starting from a stop, I can only *creep* up the steeper slopes. > Does not matter that the batteries are full, there simply is too little > torque to make it up steeper inclines. > > Hope this clarifies, > > Cor van de Water > Chief Scientist > Proxim Wireless Corporation http://www.proxim.com > Email: [email protected] Private: http://www.cvandewater.com > Skype: cor_van_de_water XoIP: +31877841130 > Tel: +1 408 383 7626 Tel: +91 (040)23117400 x203 > > > > -----Original Message----- > From: [email protected] on behalf of Jerry Yue > Sent: Sat 6/8/2013 6:40 PM > To: Electric Vehicle Discussion List > Subject: Re: [EVDL] 100ah pack on the cheap > > Hi Cruisin, > > Are you using lead acid batteries for your EV ? Do you have any experience > that your battery can't climb a slope while it has plenty of electricity ? > > Jerry > > > On Sun, Jun 9, 2013 at 9:34 AM, Cruisin <[email protected]> wrote: > > > If you want to do it on the cheap, stick with ACID > > > > > > > > -- > > View this message in context: > > > http://electric-vehicle-discussion-list.413529.n4.nabble.com/100ah-pack-on-the-cheap-tp4663470p4663472.html > > Sent from the Electric Vehicle Discussion List mailing list archive at > > Nabble.com. > > _______________________________________________ > > 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) > > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130609/515bafc3/attachment.htm > > > _______________________________________________ > 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) > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20130609/9fa1da79/attachment.htm> _______________________________________________ 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)
