Comments on: Investors Like New Battery Technology http://carbonanotubebattery.com/investors-like-new-battery-technology/ The future is now Sat, 12 Jun 2010 12:14:20 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Robert http://carbonanotubebattery.com/investors-like-new-battery-technology/comment-page-1/#comment-91 Robert Fri, 02 Oct 2009 14:11:25 +0000 http://carbonanotubebattery.com/?p=307#comment-91 While NiMH may be great for commuter vehicles and other PHEV applications - It would seem that people who want V8 Turbo & Nitrous type performance in an EV will be using this form of Lithium Chemistry, when you consider its ability to deliver 30 X the rated power steadily and 10 second pulses at 50 X its rated power! It is true that the Tesla does not use it but still gets sub 4 second zero to 60 times with Li-Ion (Cobalt), it has a fairly large battery pack at 900 lbs, and this chemistry would weigh in at 1200 lbs or more for the same energy - but such pack could blow all the power circuits out before hardly warming up the batteries! (That's why the Killacycle uses them - Power!) The challenge is Power vs Energy: Li-Ion (Cobalt) 18650 Cells come in at over 2000 mAh per cell while the A123's have only only 1100 mAh - but - typical specs for the Cobalt cells are maximum 2X the energy for power output (2C) while the A123's can dump power at 30C! I would like to see a group build an Open-Source Project combining the two cell types - in a Hybrid Module or Battery! The Cobalt cells could be used to provide up to a max of 2C while the A123 Cells could deliver the the High C loads for accelleration - like a Lithium + Supercapacitor layout! While NiMH may be great for commuter vehicles and other PHEV applications – It would seem that people who want V8 Turbo & Nitrous type performance in an EV will be using this form of Lithium Chemistry, when you consider its ability to deliver 30 X the rated power steadily and 10 second pulses at 50 X its rated power!

It is true that the Tesla does not use it but still gets sub 4 second zero to 60 times with Li-Ion (Cobalt), it has a fairly large battery pack at 900 lbs, and this chemistry would weigh in at 1200 lbs or more for the same energy – but such pack could blow all the power circuits out before hardly warming up the batteries! (That’s why the Killacycle uses them – Power!)

The challenge is Power vs Energy: Li-Ion (Cobalt) 18650 Cells come in at over 2000 mAh per cell while the A123’s have only only 1100 mAh – but – typical specs for the Cobalt cells are maximum 2X the energy for power output (2C) while the A123’s can dump power at 30C!

I would like to see a group build an Open-Source Project combining the two cell types – in a Hybrid Module or Battery! The Cobalt cells could be used to provide up to a max of 2C while the A123 Cells could deliver the the High C loads for accelleration – like a Lithium + Supercapacitor layout!

]]>