Higher energy LiPo pouch cells

[pm_dawn]

What about the EIG C020 cells.
Might not have all the power you need, but they come in at 174wh/kg and can do 5c cont and 10c burst (10s)

http://www.eigbattery.com/_eng/designer/skin/02/01_03.asp

here is the data sheet.





Regards
/Per

Why, they are even worse then 18650 mentioned in both energy density, power, and cost.


jonescg - you are obviously not aware of potentials of new generation high power 18650 cells, that's too bad. 6p or 8p pack would be enough for your needs, just like hillhater pointed out.

That was becuase he asked for pouches.....

And because I though he was tired of parallelling many small cells ?

But for for sure the 18650 track is getting more and more interesting every day. Or even the larger sizes cans.

Kind Regards
/Per

 

[jonescg]

Pouch cells will be the easiest to fit to my current pack format, that's why I'm after some. I don't mind paralleling lots of pouch cells together - that's what I do currently anyway. Any cell that's 9 mm thick, 50 mm wide, and 135 mm long will work. I just want more Wh per cell.

 

[jonescg]

No idea if these cells actually deliver, but they have great specs. Otherwise I would go with VTC5 cells
http://www.gebattery.com.cn/product/batteryoperatedracingcar.html

GE Battery got back to me with some responses. The impressive 6800 mAh cell stores over 220 Wh/kg, but sadly only manages 3 C; no idea if that's continuous or max. Shame it's not more because that's an outstanding energy density.

They also have 9 x 45 x 135 mm cells with the terminals at either end of the cell. These offer 25 C, and pack about 180 Wh/kg.

If not for the unique packaging strategy it could be a fairly desirable cell.

 

[Frank]

Hi Chris,

This is a very apropos thread for me as I'm considering the same HK 5Ah cells you've been using. Rather than hijack this thread I think I'll start a new one entitled "Pack Construction Details" to ask some specific questions. Thanks!

Frank

 

[Hillhater]

What happened to those "Haiyin" 6Ahr, 67C, pouch cells that "Evodragracer" was using in his " Warpfactor 3" drag car ?
I know they fell on their face at anything approaching max discharge, but I recall they could output 240A (40C) and hold 3+ volts for a while .

 

[voicecoils]

What happened to those "Haiyin" 6Ahr, 67C, pouch cells that "Evodragracer" was using in his " Warpfactor 3" drag car ?
I know they fell on their face at anything approaching max discharge, but I recall they could output 240A (40C) and hold 3+ volts for a while .

Ron's pages seem to lead to dead links now...that includes the International Drag Racing Association Corp and East Coast Electric Drag Racing Association neither of which gained much traction as far as I can tell.

Haiyin still sells a 6Ah cell claiming a high 65C rate here: http://www.haiyinstore.com/products_s.asp?p_id=234 with these dimensions:
Length (mm) 93
Width (mm) 46.5
Height (mm) 18.5
Weight (g) 141

I wouldn't mind knowing the weight of the cell without the hardcase around it and a discharge curve at 390A 8)
At US$1500/kWh they'd have to be pretty damn good!

 

[Hillhater]

If they are the same cell .....
I remember Ron posted a test curve for 400 amp load that knocked the voltage down to under 2 volts within a second or so !
The best it could output and hold a steady voltage for more than a few secs was 250 A at 3.0 volts.
Rons pack dropped to half it's nominal voltage under load on the track.

 

[jonescg]

I'm going to try out some of these FEP cells:
http://www.endless-sphere.com/forums/viewtopic.php?f=31&t=38252&p=989262#p989262

Will report back