Bill Dube via EV wrote:
A Lee Hart "Batt-Bridge" is an excellent addition to a BMS. "Belt and
suspenders" type approach. Redundant systems.
Cor and Bill are right. The Batt-Bridge is the simplest "BMS" I could
devise. Dirt cheap. It does nothing about imbalances, but at least it
*warns* you before something goes seriously wrong. I documented it at
http://www.sunrise-ev.com/LeesEVs.htm#battbridge
The resistive divider does load the cells; but at least it's a constant
load current across *all* cell, and not different loads for different
cells. But Cor is right that you want to disconnect it when the pack is
not being used.
A zero-center microammeter, or even a digital multimeter can also
replace the LEDs. This gets the load current down to microamps; low
enough to ignore.
--
The greatest pleasure in life is to create something that wasn't
there before. -- Roy Spence
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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