Supplementary Requirements

August 2004

This is a list of detailed requirements for the EV project.

Safety Requirements

• Low battery charge stop (settable based upon SOC)
• Cannot drive if plugged in to charger
• Battery boxes to isolate the batteries from the car
• When charging, system is completely isolated from the drive/controller and chassis
• Charger has a GFI
• Accessory low battery charge stop
• Emergency power cut-off
• Must be stopped to shift from N to forward
• Must be stopped to shift from N to reverse
• A gentle chime when the vehicle is put into reverse
• Hi temp on motor shutdown
• Hi temp on controller shutdown
• All switches linked to drive computer
• Accessory battery for emergency use
• Overvoltage protection for LiIon batteries
• OVP will "dump" the regen current if not enough room for charging
• Overtemp protection for LiIon battery pack
• Fire protection system for LiIon pack
• Detect ground fault between high voltage system and car frame
• Detect ground fault between charger AC and car frame

Noise Suppression Requirements

• rubber mounted motor to eliminate vibration and harmonic
• rubber mounted controller to eliminate harmonic noise

Misc Features

• Regenerative Braking
• LED signal lamps and brake lamps
• Anti-rollback for stopping on a hill
• Electronic traction control
• Informative idiot lights (NQIL - not quite idiot lights)
• Faired mirrors
• Warning if power steering brushes are worn
• Use existing fuel gauge to indicate state of charge
• Flashing Brake lights design document here