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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!
That was an awesome show. It clearly sits in your 10 ten of shows you’ve done up to now.
Agreed!
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…
http://www.evdrive.com/prototypes/2008/02/12/cell-welding-begins/
“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
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.
What an episode, my fave to date! Thanks very much
Great Show!
I could listen to Bob talk about this stuff for hours.
Keep up the techie guests.