Gottdi, thanks but I am not sure I understand your points/questions.
Here is more info:
When in generator (powered by the Diesel engine at 3200 rpm), the PMG132 might turn at approx up to 5800 rpm (reductor between the 2 engines). So I suspect it can generate voltage around 100 V into the controller.
In that case the 1st question is: What happens if the Kelly controller receives 48V from the battery but 100V from the generator:
(a) can it send only 58V of it to the battery pack,
(b) does it send nothing =0V in the case it exceed the 58V limit,
(c) does it damage the controller
2nd question: Whatever is the voltage produced by the generator: 15V, 20V, 30V, 40V, 50V, ... can the regen voltage coming from the controller to the battery be set precisely to a constant voltage (Lithium requirement), in my case 58,4 Volt or so (16 LiFePO4 cells of 3,2V that have to be charged at 3,7V) ?
3rd question: Of course it could overcharge the cells. It is not regen braking, but regen with Diesel powering the generator, it can last for hours. When the battery pack reach the 58V voltage, I guess the BMS sends an order to cut the charge. Since the charge is not coming from chargers talking with the BMS, Do I have to put a relay somewhere or is that max voltage managed by the controller?
4th question: if the voltage is too low, reaching about 40V, can it disconnect the electric engine (in order to respect the minium voltage of 2,5V / cell or so).
Last: the controller has to be reliable; I dont want to take the risk to blow the battery, or loose the $6000 of the LiFePO4 cells because of a controller bug...
So anyone actually doing regen with LiFePO4 and PM motor?