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SBM voltage protection
 
Why the SBM module set as low as 2V limit for protection during discharging?
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The SBM is designed for small capacity cells. When discharging
with peak currents, the voltage on these cells may go as low
as 2.0V. In order to prevent randome disconnection under
big loads, the voltage of the SBM is set to 2.0V per cell.

The SBM is a simple low cost solution to allow simple
monitoring of battery packs.

The SBM should be viewed as a lowevest level of the cell
protection. We suggest to monitor the voltage of the whole
pack as well and stop discharging when the voltage gets low.

Please see the explanantion here:
http://gwl-power.tumblr.com/post/72167031736/bms-versus-circuit-breaker-understanding-the-bms

We suggest to use BMS for systems that need complete battery
monitoring and management.

See here:
http://www.ev-power.eu/BMS123-System/

and here:
http://gwl-power.tumblr.com/tagged/BMS123
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