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Tesla Powered BMW E31 8 Series

40540 Views 110 Replies 25 Participants Last post by  jackbauer
So some of you might already know about my E31 conversion as it's been going on 3 years now! Currently running a Siemens 1pv5135 motor and DIY inverter and 6 speed manual gearbox. Has been running very well the last few months but with the Tesla components becoming available and my work on the open source control boards progressing nicely I've decided to convert the E31. Again.

I had originally thought to use the small high efficiency drive unit but decided to go all in and put in the Large rear unit for 450hp+ :D

Going to be getting some help and the use of a workshop and vehicle lift for the drive unit install as it will need some serious work done to the rear subframe and boot floor. Once the drive unit is in then I can start putting some batteries into that nice big empty engine compartment. Should make quite a fun car and test bed for the open source control board. Stay tuned:)

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Also i have made one cell of 48P1S panasonic NCR18650PF. So some 134Ah cell in effect. They show 13% voltage drop at same load. I put it in my car in series with kokams. Liions have more Ri and it shows with load. When i remove my foot however they bounce back to 3.9V/cell without significant effect. No significant temp increase too. They are just softer...
A
Tesla's 100kWh packs in the P100D are producing 1500A at max discharge.
That means about 17a from each of the 8256 cells.
With a DCIR of 40 mOhm each, a volt sag of 0.68 v per cell , or 65 volts on the full 96S pack...so 335 volts theoretically !
..which would mean 500+ kW , or 670 bhp !
 
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