[time-nuts] Low noise power supplies?

Poul-Henning Kamp phk at phk.freebsd.dk
Thu Jan 31 08:02:09 UTC 2013


Content-Type: text/plain; charset=ISO-8859-1
--------
In message <BLU170-W704BD0870332925FA3E67DCE1D0 at phx.gbl>, Mark Sims writes:
>
>A123 20Ah LiFePO4 cells have an internal resistance in the milliohm
>range.  Their M1 26650 format cells are around 8 milliohms.  Most
>high capacity (>3000 mAh) 18650 style lithium cells are around 10-15
>milliohms.

different chemistries have different levels of noise, and I belive
Lithium is not in the good end of the spectrum there.

As I understood the general theory: batteries have more noise the
further the electrodes are from being pure metals, so maybe the
best and lowest noise is to build a volta-pile ?


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



More information about the Time-nuts_lists.febo.com mailing list