3 ms·

Here is the spec sheet for the main square chip on that board. http://www.ti.com/lit/ds/symlink/bq76pl536a-q1.pdf http://www.ti.com/lit/ds/symlink/bq76pl536a-q1

• jacquesm 12y ago
  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).
  • SpacemanSpiff 12y ago
    Take a look at http://files.wizkid057.com/teslapack/update2/Tesla%20BMS%20Module%20-%20Front.jpg 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.
    • jacquesm 12y ago
      Good eye. There are exactly 6 of those so yes, you are very likely right!