If you open that switch, those 12A of constant current have no choice but to all go into the battery, so it makes sense that it won't stop charging.
(well, a little of it will go through the "off" resistance of the open switch, but still...)
Actually, is there a reason for that constant current source being there? I feel like the 3-Phase Supply should provide the energy, and then opening the switch will disconnect that from the batter.
- Sebastian
