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Adding Regen to DC? Not for range...

8007 Views 29 Replies 12 Participants Last post by  Overlander23
I live in the foothills of SoCal and I notice that while I drive any of my ICE vehicles, auto or stick, I use downshifting to control my speed. I do this for traffic or hills. Since I am seriously considering a DC electric conversion, I would like some resistance from the drivetrain when operating under zero throttle. I would use the transmission to select the amount of drag, lower gears for more deceleration, just the same as the ICE vehicles. My intended pack voltage will probably be 156V (48 lithium cells). I know that a controller will be needed to prevent overcharging, the max regen (charging) voltage should be no higher than 168V - 170V.

Since I typically care about efficiency, I don't want to just drag the brakes all the way downhill or approaching a traffic signal (I don't do that today in my Suburban, Fit, Insight or 914-V8). So for the sake of driveability, how can I get the conversion to feel more like a regular car? I'm not impressed with the AC systems that are available today, none seem to match the power of a WarP9 for a similar weight.

I've spent a day reading way too many threads that barely touch on the subject (please don't mention perpetual motion) and the only practical advice that I mined from all that has been the guy with the S-10 that rewound his own alternator. I was hoping that I could buy most of the components necessary to build a similar finished product. I'm not looking for a kit, just some sources for the major components. I'm also open to alternative strategies. Anybody else headed down this path before?

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Not that I've ever heard of. Saying "get a sepex" sounds good, until you actually try to do it.
Then it's frustrating as h3!!. :rolleyes: Since I finally realized that high-power SepEx wasn't worth the hassle, I've been testing not using the engine for braking in my (5spd) Accord daily driver. It's really not that big of a deal once you get used to it. Definitely not something that's worth spending a lot of unnecessary cash to simulate. You'd get more for your money with better brakes and/or more batteries.
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