Re: [EVDL] Tesla batteries (maybe good news via Valence batteries)
guys, it might not be completely hopeless. I'm quite optimistic about
the battery situation now even though it's not quite here yet.
first of all I think we should forget about NIMH, since it seems to lose
out to LiFePO4 cells on all counts now.
half the weight and 5-10 times the power at similar price is significant.
I've been dancing with Valence Technology the last few weeks and I just
got their 'opening bid':
IFR 26650 EC/PC
1-10 - $20.00
up to 1k - $10.00
up to 10k - $8.00
up to 1MM - $5.00
he said similar prices for their small cells but they are not
interesting as they are 4C peak and the 26650 is 20+C.
spec sheet:
http://www.valence.com/assets/pdf/ifr26650_power_cell_data_sheet.pdf
same size cell as the A123 although not quite as powerful but still a
very good cell at least on paper. I'm getting some samples from them
that I will send to Ian Hooper for testing like he tested the Phet
cells. he also tested A123 cells recently but initial results indicate
they are too good for his equipment to really push which is a nice
luxury problem for a cell
as I read the prices given to me it means if you buy more than 10k cells
you get them at the magical 5$ price area where they start to become
economically viable in my opinion. that is also the price point some
have speculated A123 cells are at since you can buy dewalt packs for 10$
cell price.
in a small car I guesstimate that's around 25miles worth of range for
3000$. their charts indicate more than 70% remaining capacity after 1000
100%DOD 8.3C cycles. the cell is around 90Wh/kg
I'll try to get him to see the value of selling the cells at 5$ each no
matter the volume since I would imagine that opens up for a lot of
converters business that might end up giving them large volume sales. it
probably didn't hurt A123 sales that killacycle ran their cells. for
those few of you willing to get 10k at once there shouldn't be any
problem for you getting them as is.
Ian and I have been pondering packing the cells in tubes with the cells
held together purely by pressure as an easy way to go from the small
cells to larger packs, you can even have bms taps on the side of the
tube for each layer
I'll try to make overtures to A123 and Altairnano too.
Dan
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev
guys, it might not be completely hopeless. I'm quite optimistic about
the battery situation now even though it's not quite here yet.
first of all I think we should forget about NIMH, since it seems to lose
out to LiFePO4 cells on all counts now.
half the weight and 5-10 times the power at similar price is significant.
I've been dancing with Valence Technology the last few weeks and I just
got their 'opening bid':
IFR 26650 EC/PC
1-10 - $20.00
up to 1k - $10.00
up to 10k - $8.00
up to 1MM - $5.00
he said similar prices for their small cells but they are not
interesting as they are 4C peak and the 26650 is 20+C.
spec sheet:
http://www.valence.com/assets/pdf/ifr26650_power_cell_data_sheet.pdf
same size cell as the A123 although not quite as powerful but still a
very good cell at least on paper. I'm getting some samples from them
that I will send to Ian Hooper for testing like he tested the Phet
cells. he also tested A123 cells recently but initial results indicate
they are too good for his equipment to really push which is a nice
luxury problem for a cell
as I read the prices given to me it means if you buy more than 10k cells
you get them at the magical 5$ price area where they start to become
economically viable in my opinion. that is also the price point some
have speculated A123 cells are at since you can buy dewalt packs for 10$
cell price.
in a small car I guesstimate that's around 25miles worth of range for
3000$. their charts indicate more than 70% remaining capacity after 1000
100%DOD 8.3C cycles. the cell is around 90Wh/kg
I'll try to get him to see the value of selling the cells at 5$ each no
matter the volume since I would imagine that opens up for a lot of
converters business that might end up giving them large volume sales. it
probably didn't hurt A123 sales that killacycle ran their cells. for
those few of you willing to get 10k at once there shouldn't be any
problem for you getting them as is.
Ian and I have been pondering packing the cells in tubes with the cells
held together purely by pressure as an easy way to go from the small
cells to larger packs, you can even have bms taps on the side of the
tube for each layer
I'll try to make overtures to A123 and Altairnano too.
Dan
_______________________________________________
For subscription options, see
http://lists.sjsu.edu/mailman/listinfo/ev