That is a normal and I don't believe there is a solution other than replacing batteries or the batteries are good then you need to add more if you want more range.
Sent from my Verizon Wireless 4G LTE smartphone-------- Original message --------From: "Craig M. via EV" <[email protected]> Date: 2/25/2016 9:08 AM (GMT-06:00) To: [email protected] Subject: [EVDL] Battery voltage sag and effects on motor I need some feedback for anyone who has seen the following effects. I want the maximum possible range out of my EV but when the battery is weak (58 miles or so,) acceleration can be a problem. If I hold down the accelerator pedal too long the voltage drops low. The motor pulls a lot of current, and the motor may slow down as the battery rapidly discharges. I have also observed that if the motor stalls, it draws very high current and the battery is soon fully discharged. To get home on a weak battery I have had to accelerate in steps or pulses. I would lift my foot off the pedal for about a second and let the voltage on the battery come back up before pressing the pedal down again to accelerate. There is an alarm that sounds if the voltage on any cell is too low or too high. I have an AC-50 motor and controller with the regenerative feature and LIFEPO4 cells. This may be playing a role in this effect. I would appreciate hearing from anyone who has pondered the effects of voltage sag on batteries and motors. I have asked this same que stion elsewhere and I got back shrieks of how I am breaking the laws of physics, motion or thermodynamics. I can't break those laws so I frankly have stopped worrying about it. I am making observations and trying to learn from them. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20160225/af92877b/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at 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/20160225/e4d77876/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
