Lipo Balancer

118

02:13:33

Maintains balance within .2 volts across 2 cells 

published 8 years ago

pannaga

8 years ago

hurz

8 years ago

Not to bad, but some practical issue are open. 42mA balance current needs days to balance big lipo cells. From were to get +-15V for the OpAmps? What if I would like to extend this to a 20s battery pack? Keep it up!

BJD00000

8 years ago

Created to maintain balance of small lipo \ life packs. Primarily because cheap balance chargers don't do a good job. Also, single cell current should be kept below 400 ma. Not meant as a discharger. Op

BJD00000

8 years ago

Also note sure where this tool is getting 15 volts. The actual prototype uses comparators driving mosfets with pull up resistors. Op amps are the only component close to comparator in this tool.

hurz

8 years ago

This brings another topic which I miss, there is no hysteresis in switching and I dont think it will work proper without one!

BJD00000

8 years ago

The 100 ohm resistor acts as the buffer between the 2 states. This allows a .2 volt neutral point between the 2 discharge scenarios. The prototype works very well but as I mentioned it uses comparators instead of op amps.

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