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Welcome, Bob Simpson of EV Drive!
- Bob started the new venture once inspired by the Tesla motors story and the white papers they published.
- Bob converted a BMW 325.
- There are pictures of the Range Extender (REX) on the e46 page.
- A proof of concept for the batteries was on a motocross bike, the e-moto-CRF250R
- EV Drive is now mostly in the business of supplying subassemblies to other manufacturers and enthusiasts.
- Higher voltage is better for powering these types of motors. Upwards of 700V out of the battery assembly!
- Bob used standard A123 battery packs and built a Battery Management System (BMS) around each cell (floating).
Got any more questions for Bob? Leave them in the comments!
Jelle Haandrikman (@jhaand) says
That was an awesome show. It clearly sits in your 10 ten of shows you’ve done up to now.
Quite a passionate guest.
With the current petrol prices (up to 1.75€/liter) I will certainly not buy a new ‘conventional car’ ever again. I simply can’t afford it anymore. I will keep my old one until it falls to pieces. Fortunately I don’t need it much… Bicycles FTW!
Does anyone has link to original build log to Bob Simpson BMW 325i ?
I’ve seen it 3-4 years ago and it had a lot of pictures which showed his excellent build a lot more.
nevermind, found welding of battery pack under motorbike posts…
“Your average punter” might keep their retired Li pack as an “quick-charge pack” in their garage for their car, a visiting friend’s — or a stranger’s dying battery, as readily as you’d let them use your phone or help them with a jumpstart. Add a $300 inverter, and you have backup mains power to run a fridge, furnace, circulator pumps, etc in an outage
Tilman Baumann says
Can I see somewhere how the actual cell pack design looks?
It sounded very three dimensional. But it never formed a tangible picture in my head.
Matt D. says
What an episode, my fave to date! Thanks very much
I could listen to Bob talk about this stuff for hours.
Keep up the techie guests.