[jeremyjs]

Saw this on the evtv blog. Looks like the new calb cell is going to be pretty awesome.

http://jackrickard.blogspot.com/2012...ump-shift.html

[Ziggythewiz]

We'll have to wait and see what the price is on them, and maybe that will drive the others lower.

[frodus]

Would you mind elaborating more than just the link? (it's blocked for me).

[Ziggythewiz]

New CALBs (CA series grey cells) coming out this month supposedly. Lower sag, better thermals and cycle life compared to the CALB SEs we know and love.

[jeremyjs]

Originally Posted by frodus

Would you mind elaborating more than just the link? (it's blocked for me).

Just a much better cell. Less sag, less heating at high C rates, better cold weather performance, higher cycle life and they should be more consistent from cell to cell in capacity due to more automated manufacturing. This is all based on CALB's data sheets that he received from calb. Jack makes promises of much in house battery torture to see just how much better they are. He's melted many a lithium iron cell on camera demonstrating their capabilities on bench tests. No mention of any energy density changes or price.

[Bowser330]

...interested in the comment he made about energy density being 70% better then the SE cells, and that if the 180AH SE cells sagged 22% @ 1000A then, 22% sag in the 180AH CA cells should be 1700A....

[MN Driver]

Pulling 10C from the 60Ah cells with a Sol Jr feels a little more comfortable if these new cells generate less heat while they are at it. Since the voltage sag would then be less, I'd probably not even be hitting the 600 amps since my motor would hit the max voltage first. Either way, I'll take it! Was planning for Sinopoly because of their 60Ah(B) cell and its light weight but their lack of availability of that cell size in the US and the apparent improved cell from CALB, I might take the hit on weight.

[somanywelps]

Originally Posted by MN Driver

Pulling 10C from the 60Ah cells with a Sol Jr feels a little more comfortable if these new cells generate less heat while they are at it. Since the voltage sag would then be less, I'd probably not even be hitting the 600 amps since my motor would hit the max voltage first. Either way, I'll take it! Was planning for Sinopoly because of their 60Ah(B) cell and its light weight but their lack of availability of that cell size in the US and the apparent improved cell from CALB, I might take the hit on weight.

What motor are you running?

[MN Driver]

Originally Posted by somanywelps

What motor are you running?

Planning to use the Kostov 9 with the higher voltage series field mode configuration and am going to put the motor order in soon(up to 12 week lead time since the US distributor doesn't stock them as they aren't popular yet and need to wait until they are getting a volume Kostov order in if I don't want to pay for small piecemeal intl shipping $$$). I imagined most any 60Ah 100 cell prismatic pack to sag to 250v under 600 amp load, especially with colder weather, therefore that made my decision. I also need a higher voltage pack to get the capacity and voltage I need as a 90Ah or 100Ah pack at 20kwh wouldn't be nearly enough voltage for this motor. Smaller cells of the same total capacity perform better at the same discharge amperage too.

[dladd]

the impression I got from reading his blog is that it is an incrementally better cell, with an incrementally higher price. Good on the better cell, bummer that prices are not dropping...