Re:Inside a Tesla Model S Battery Pack
by jacquesm on Thursday September 11, 2014 @08:12PM
(#8305968)
Where is the actuation mechanism for that that though? There does not appear to be any circuitry for that here. At a minimum you'd need something that would engage/disengage the cells, either a FET or a IGBT. (the voltage drop on other devices would be too large).
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Re:Inside a Tesla Model S Battery Pack
by SpacemanSpiff on Friday September 12, 2014 @02:27AM
(#8306825)
Take a look at http://files.wizkid057.com/teslapack/update2/Tesla%20BMS%20M...
For cell #1, my guess is that the 4 parallel resistors (R3) are the balancing resistors and that Q1 is a small logic level MOSFET which enables cell balancing. On a BMS project I'm working on balancing current is only 250mA, so a small SOT-23 MOSFET is all you would need.