Quote:
Originally Posted by Daox
That looks perfect
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Only because it didn't involve any welding!!!
I also rigged up a contactor in the trunk. A contactor is a very heavy duty remotely powered switch. This is sort of a master cut-off for the main power system.
The contactor uses 36V to run through the coil to make the main power connection. To do that, I ran wires from either end of three of the batteries.
I then ran those wires to a relay. That way, I can use 12V to activate the 36V to the contactor to connect it and run 72V through the main heavy power cables to the motor and controller.
But how do I run that relay? I wanted something nice and simple without wiring up another switch. Since there is no radio in the car right now, whatever went to it is free to use. I tried the switched power to the radio, but it didn't work. Must be a bad kink in that wire or something. The illumination power to the radio worked fine though.
I rigged the relay power up to that. Now, when I turn the lights on, it turns on the main contactor. Easy on/off switch.
I am sure I will wire it up differently later, but this is fine for now. At least now I have a panic button!
Main contactor (screwed down to plywood)
Shunt for 200 amp Ammeter (not yet permanently mounted)
Relay (foreground, blurry) which turns contactor on and off and switch (background, in focus) which turns on 72V power to the DC motor controller.
Seriously considering going for a drive in this car to pick up a pizza. No need to build a custom pizza rack in this EV!
