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i really hope someone can help me with this...

what type of battery that is suitable for an electric vehicle(slow walking speed,electric wheel barow)? is it a deep cycle marine?

I have a problem on how to choose the correct battery.

i have choose a motor which can produce a max mechanical power output of 400Watts.

http://www.boschmotorsandcontrols.c...2/kennlinie.htm [Broken]

if you look at the characteristic curve, my working torque would be around 2-3Nm, the corresponding current required is about 100A. The problem is due to the fact that the vehicle need to be as compact as possible, i can only choose one 12V battery 100Ah battery. i initially try to pick the right motor by using the assumption that, stall torque>torque require.This i know is not efficient+the rpm is slower near stall torque.

Right now the motor that ive choosen got the right working torque(2-3Nm) and rpm, and is >50% efficient but the power source could not supply more than (2-3Nm), what happens if the required torque is more than 2-3Nm??

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# Electric vehicle battery question

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