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Battery volts: No problem. (well, not a huge problem, details of voltage sag and when to cut back, but not too hard)
Battery Current: No problem. Just add another hall effect current sensor,
or!!!!! You can use the rule:
I_battery = I_motor*PWM_duty.
This gives very good results, according to the EVTech list people. It can be computed inside the microcontroller! No hall effect sensor! Cheaper! ya!
And an input from a hall effect sensor that monitors a magnet that rotates on the motor post, in order to control RPM... In order to have cruise control mode! To protect from over-revving! To um, um, tell you when to shift up or down. It could make clutchless systems easier to find that nice good spot for shifting. I can't think of anything else.
Ya, Ben, with GPS of course (ben really likes GPS).
Ya, I like the data logger idea too. energy usage, money spent driving, time for full recharge, capacity left (taking into account peukert millisecond by millisecond!), um... I can't think of anything else. Oh! Set all the limits that you want from the console. Maybe set current limit, set change in current rate, um... and other stuff.
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