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[Kumasasa]

Balancing ist nichts, was am SuC gemacht wird, da pro 24 h „nur“ 1 mV Cell-imbalance ausgeglichen werden kann.
Beim Balancing wird ja auch nicht AC- oder DC-Ladeleistung benötigt, das ist ja nur ein „Umschichten“ der Ladung zwischen den Bricks.
Edit: Balancing wird nur im Schlafzustand gemacht.

@Service Manual

Brick Balancing
…
To mitigate this imbalance, Batman has some bleed resistor that can be placed and removed in parallel of each brick via a FET relay. Batman can put that resistor across the brick with the highest voltage which would slightly discharge that brick and bring it back to the level of the other bricks. Batman closes a FET which puts that resistor across the brick. The HVBMS will order Batman to put that bleed resistor across the brick with the highest voltage when Delta V is > 5mv MinBrickV > 4.0v (~85% SOC) && HVBMS State == STAND BY.

Note that Batman can also do balancing when the HVBMS is asleep .

The best way to balance the Model 3 pack is to set charge limit to 90% or higher and let the vehicle sit idle for hours (plugged in or not). 24 hours of balancing can reduce imbalance by 1mV.