[valerun]

Originally Posted by drgrieve

Hey that's an interesting development!

Are you building a DC SepEx controller? Able to share your target parameters - volts, amps , regen amps etc

I've seen a few SepEx motors around - Kostov sell some - which are you planning to use?

Are you going Calb "grey" or Sinopoly "black" for your future builds?

Thanks,

David.

we are exploring both partnership and build options for sepex. the target params are 400V max battery voltage, 400kW max output power, 1,200-1,400A max output current, 200-300A max regen current.

right now, Kostovs are the only 'real-size' SepEx motors but netgains are a potential options.

For now, we are a CALB shop. I don't yet see the point in going to grey since they have identical specs to blue (on paper).

V

[somanywelps]

All reports indicate the grey cells have far higher discharge rates (less sag).

Something to keep an eye on.

[MN Driver]

There was a post here from Arthas who is apparently with CALB who says the CA series cells have been in mass production and the blue SE cells are what they are trying to stop manufacturing. So soon enough, that may be what they will be shipping to you. Based on the speculation here and Jack Rickard's initial testing, they might be more ideal for your higher intended output and regen rates.

Here's a link to the post:
http://www.diyelectriccar.com/forums...657#post310657

[drgrieve]

Originally Posted by valerun

Some observations from 2,000 miles in the EMW-1:
1. 11HV really needs more voltage. 97 LiFePo4 cells are really not enough. The pack sags to 250V at 800A.

Hi Valery,

Are you able to provide more detail on your report of the power density of the Calb 100ah cell?

I'm talking to Jack of EVTV and he is of the belief there should be no difference between the different cells in the same series due to same chemistry used.

But from his testing the 180ah cell sagged to 2.6v at 1000 amps, and from above it would seem the same sag but at a much higher C rate.

What are your thoughts on the matter?

Thanks,

David.

[valerun]

Originally Posted by drgrieve

Hi Valery,

Are you able to provide more detail on your report of the power density of the Calb 100ah cell?

I'm talking to Jack of EVTV and he is of the belief there should be no difference between the different cells in the same series due to same chemistry used.

But from his testing the 180ah cell sagged to 2.6v at 1000 amps, and from above it would seem the same sag but at a much higher C rate.

What are your thoughts on the matter?

Thanks,

David.

Will see if I have more details in my notes.

As to different capacity cells sagging more or less: there's too many other variables entering the equation. For example, in 180AH cells, the wiring and terminals of the cell are the limiting factor for max current, not the internals. You can see that from the datasheets - their max 10s current is 1000A (or 5.5C) while the same rating for 100AH cell is 800A (8C)... So you *will* get different sag for same C rate from different capacity cells.

V

[Thaniel]

Originally Posted by valerun

Airbags and ABS would be fine as they are controlled independently of engine. you *will* lose at least part of DSC (the one that depends on engine control). We are now working on completely emulating ICE engine response but our solution will be initially designed for e46's

Did you get this to work? If not I think I have a potential can bus solution that does not need the ECU. You may have seen my posts on bimmerforum.

Thaniel

[valerun]

Originally Posted by Thaniel

Did you get this to work? If not I think I have a potential can bus solution that does not need the ECU. You may have seen my posts on bimmerforum.

Thaniel

not yet. would love to hear. thanks!

[drgrieve]

Yeah I've read over Thaniel's work. He's doing some amazing stuff with just a dashboard and no car !?!

He's his threads - I think with your combined talents it would make for a great car experience.

http://www.diyelectriccar.com/forums...-17727p17.html

http://forums.bimmerforums.com/forum....php?t=1887229

and his video of driving the dashboard

http://www.youtube.com/watch?v=UqB4xqDC14c

[Thaniel]

Thanks drgrieve saved me hunting for those links.

One more from this forum http://www.diyelectriccar.com/forums...692#post329692
That one is where I started down the engine simulator path (and got a decent way) then was talked into looking at a can bus solution.

I see no reason why this shouldn't work on the full car as well as just the instrument cluster. But guess we don't know until we try it.

Thaniel

[somanywelps]

Any luck?

10char