Nissan Leaf Gen 4 battery conversion

@Inwo I have a question about BMS systems and the charger. The BMS system I’m going to be working with uses a CAN bus to communicate with the battery charger to regulate the charge and balancing. The battery modules have 3A shunt capabilities to bleed energy off full cells but to optimize charging the control system is designed to not only provide battery module status, SoC, temp, etc but also talk to the charger too.

How are the BMS systems you’ve worked with dealing with the charger and its output voltage and power?

On my RC batteries, the charger has two outputs and does main charging via the high current cables attached across the entire battery pack and then the balance wires to each cell of the pack is used in balance mode to balance the cells and bring them all up to full state.

I don’t yet have the documentation on this system so it could be the 5 pin connector on the end of the battery module provides balance power.