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Project '47 CJ2ev

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tufcj2a View Drop Down
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    Posted: 01 Aug. 2020 at 10:45pm
All,

In a previous thread I mentioned I was starting a new build.  Having acquired a pretty much full '47 CJ minus engine, I did some math, ran some numbers, and took a few measurements.  A bit of research and I figured why not make this one electric.

Parts:
1947 CJ2a
Curtis 1231c controller - 500a/96-144v
Thunderstruck EVCC and BMS
Elcon 1500 Charger
DC-DC converter (144v-13.8v/50a)
39 LifePO4 200AH prismatic cells (in series for 125v)

Started the project May 12.  Almost done.  Pictures below:







































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Ol' Unreliable View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ol' Unreliable Quote  Post ReplyReply Direct Link To This Post Posted: 01 Aug. 2020 at 11:00pm
Interesting...that tub appears to have been in amazingly good shape rust-wise.
There's a reason it's called Ol' Unreliable
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nofender View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nofender Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug. 2020 at 6:28am
I"m very intrigued with the electric conversions on classics. Very cool! What does a battery pack like that weigh? 
46 CJ2A rockcrawler
46 CJ2A resto-mod
51 Bantam-ish trailer
68-ish CJ5
50-ish Sterling trailer
15 Grand (Mrs Nofender)
19 Hemi Ram (parts hauler)
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LuzonRed47 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote LuzonRed47 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug. 2020 at 8:39am
Tufcj2A, interesting project!
Is your battery pack intended to be air cooled? EV packs generate a lot of heat and most OEMs engineer them to be liquid-cooled, for cars, light trucks and everything larger. What sort of fan/ducting arrangement are you planning?   
CJ2A #140275 "Ziggie"
ACM #124334
1953 Strick M100 trailer
Serial #18253
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tufcj2a View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tufcj2a Quote  Post ReplyReply Direct Link To This Post Posted: 02 Aug. 2020 at 2:07pm
Tub was in great shape.  Very little work needed to be done.

The batteries weigh about 300lbs, along with the motor and other pieces the total weight is about 550lbs, similar to the standard engine with all accessories.  I got lucky with that one.

I will air cool the batteries.  On the bigger builds running higher amps and harder driving they do liquid-cooling.  I saw enough air cooled that I'm okay for now.  If I need to add it later I can.  I'm using fans to push air across the battery pack, electric motor and controller.
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