Hi All. Starting a thread for my new EV project!
This one is going to be this 2001 BMW 330ci. I've been wanting to do an BMW coupe conversion for several years now. I've always loved the way they look and feel, they are beefy enough to carry the weight of the batteries, and the coupe body style allows for the rear seat to be re-purposed for battery placement while maintaining good weight distribution.
The transmission is from a 2007 Lexus GS450h. It contains two electric motors and gear reduction. The output shaft is the same configuration as that used on the BMW it's going in and should be easy to adapt. I've calculated the total combined power from both motors to be around 200kW (270hp).
The inverter will be based on the OEM inverter that the transmission was originally coupled with. There will be a fair bit of modification done to allow this to drive both motors at high power levels. This will be the subject of much reverse engineering and custom circuit boards.
Pictured is 32kWh of Chevy Volt batteries (two cars worth). I'll be putting these batteries in series minus a few modules to keep the voltage within the rating of the inverter. I'll end up using about 29kWh worth of these cells for a range of around 110miles. The total pack will have a nominal voltage of around 640vdc.
I used the data provided in the ORNL teardowns of the Camry hybrid and LS600h drivetrains to calculate the expected performance. The combination of these pieces should allow me to build a car that does 0-60mph between 4-5 seconds, gets around 110-120 miles to a charge, seats two, and has unimpeded trunk space.
Everything in this conversion will be used or salvaged parts from other hybrids or EVs, with the exception of the custom electronics needed to make it all work together.
It should be a very nice car to drive.