paul dove via EV wrote:
Unless you change the chemistry they will be the same voltage
Paul, that is exactly right. And they *do* change the chemistry...
often. You can buy a batch from the same vendor a year later, and the
formulation will have changed.
I suppose that is possible but I never observed that is the brands I have
tested. They always settled to 3.38v. I see no variation.
Perhaps you just have a small sample size.
I have half a dozen different brands of LFP cells. As I quick test, I
just measured their resting voltages of some that I haven't charged or
discharged for a month or more. They range from 3.332v to 3.391v.
It's also cold in Minnesota. The CALB cells in the garage measure 3.33v.
The ones in the basement measure 3.34v.
The accuracy of your meter is also going to be an issue. Few meters are
actually accurate to 0.01v. I used my Tektronix DM501A, because it's the
most accurate DMM I have.
Lee
--
There is a computer disease that anybody who works with computers knows
about. It's very serious, and interferes completely with your work. The
trouble with computers is that you 'play' with them! (Richard Feynman)
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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