hillzofvalp wrote:It would simplify my setup greatly if I was able to tap into three places of my pack instead of disconnecting it. I have isolated supplies. In this setup, one lead would be shared between chargers: the middle break between 20S. Is there a short circuit doing this? I do not see how there could be. The balance connectors also share the same thing.
If I read this correctly, its the same way as mine so no short.
Your pack stays in 20s at all time and can remain connected to the controller at all time.
You have 2 x 1420i chargers, each connected to its own separate power supply
You have 5 connection points coming out of your pack:
1- Main discharger lead that covers all 20 cells (74V) - connected to the controller
2- Charge Lead for the first half of the pack (cells 1 to 10 - reads 37V nominal ) - connected to (+) (-) of charger 1
3- Balance leads for the first half of the pack (cells 1 to 10) - connected to balance port of charger 1
4- Charge Lead for the second half of the pack (cells 11 to 20 - reads 37V nominal ) - connected to (+) (-) of charger 2
5- Balance leads for the second half of the pack (cells 11 to 20) - connected to balance port of charger 2
As I and others did, you can also reduce the number of connections by combining the charge leads and balance leads for each half of the pack in a bigger connector (DB25 or the ones from Gary). Then you end up with only one connector for each charger and the main discharge connector for the controller.