Prisimatic LiFeP04 Porn

Batteries, Chargers, and Battery Management Systems.
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oatnet   10 MW

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Prisimatic LiFeP04 Porn

Post by oatnet » Oct 20 2007 11:23pm

Today I went to AltCarExpo, where I had the opportunity to meet Andy of FalconEV in person,. After the show I met him at his shipper and procured the following box 'o 12ah 3.2v LiFeP04 from him. While I was there, I literally unscrewed the box lid from these batts, fresh off the boat. Some of the batteries were marked with an x, the ones Andy pulled out for me were marked with a v, not sure why.

These cells are what I envisioned LiFe as being all along! Chargers are the same white-plastic-multi-cell chargers I am seeing with every single LiFe pack.

I am also holding a bike for Andy with one of the new Hornet motors, and a 48v 25ah LiMn pack, for sale to anyone in the LA area. Very impressive looking vehicle, pics to follow, and details to follow on the cells when I get a chance to do something with them.

-JD

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efreak   100 W

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Post by efreak » Oct 21 2007 9:46am

thanks these seem to be like the cells that are sold by yasa physically at least. ant discharge rate info?

porn indeed, I feel shame!!!
efreak
5304 x-lyte
new72v 35-40
26" supercycle

working on 80 cell m1

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oatnet   10 MW

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Post by oatnet » Oct 21 2007 2:35pm

efreak wrote:thanks these seem to be like the cells that are sold by yasa physically at least. ant discharge rate info?
I forgot to ask - Andy's website lists prisimatic cells at 3-5c , and I hope this is the case here because I want to pull at least 40a from them. I think the stubbier cells were the ones I have seen pictured with the higher C. We shall see.

Cell Quick stats:

496 g (1 lb 1.5oz) on my kitchen scale, tape on terminals removed
27.36 mm thick (at slight bulge in center of cell)
80.35 mm wide
114.40 mm tall, to top of center vent
103.4 0mm to top of cell, excluding terminals
3.39v - fresh out of box voltage.
3.60v - alleged peak-charge voltage

I am working on an ergonomic pack shape, but might give up and make the standard blocks.

-JD

Adam G   10 µW

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Post by Adam G » Nov 04 2007 9:21pm

I just ordered a pack based on what I believe to be the same 12Ah stubby prismatics and the response I received from Andy is as follows:
"specs are 10C peak 5C continous..way beyond the limits of your controller, -20c to 60 centigrade before any loses are noticed."
Adam

Look forward to testing these.

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fechter   100 GW

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Post by fechter » Nov 05 2007 10:07am

Welcome! Look forward to hearing your report.

That's not beyond the limits of my controller :twisted:
"One test is worth a thousand opinions"

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