Holy shit, I wrote a lot of words. I deleted most of them since it was verbose.
I wanted to say, this depends on your charger. If your charger is a very simple CC/CV charger you should be OK under one condition: You probably want a very beefy or multiple beefy schottky diodes on the output of the charger. In series with the positive lead of the charger.
The condition I'm concerned about is backfeeding into the charger when the load is high and the battery becomes higher voltage than the charger due to foldback protection on the charger.
I would love to see if someone more knowledgable says whether the schottky diodes are required or not. They might not be. And they do have an efficiency cost depending on your total pack voltage (0.2/72 = only 0.27% loss but non-zero)
I wanted to say, this depends on your charger. If your charger is a very simple CC/CV charger you should be OK under one condition: You probably want a very beefy or multiple beefy schottky diodes on the output of the charger. In series with the positive lead of the charger.
The condition I'm concerned about is backfeeding into the charger when the load is high and the battery becomes higher voltage than the charger due to foldback protection on the charger.
I would love to see if someone more knowledgable says whether the schottky diodes are required or not. They might not be. And they do have an efficiency cost depending on your total pack voltage (0.2/72 = only 0.27% loss but non-zero)