I'm building an Arduino 10,8 Volt li-ion battery pack out of standard 18650 cells and have spent a lot of time researching charge protection circuits.
Suitable battery protection circuit boards (PCMs)
are easy to find, but it's somewhat unclear how to configure the complete setup with charger.
The PCM boards provide over/undercharge protection, but it seems they don't regulate the charging process itself. Somewhat confusingly, they also specify a single discrete input voltage; not a voltage range
These are my questions:
Are there voltage regulators on the PCMs ensuring they operate at a constant voltage or do I have to charge at a constant voltage in order not to exceed the PCM voltage spec?
A constant voltage charger is essentially a power supply. Is this a reasonable/safe alternative ?
I guess some chargers have their own internal "smart" circuitry that regulate the charging process. Could this functionality interfer with the PCM causing unexpected results?
The PCMs I've found don't seem to have connections for thermistors or regular temperature sensors like most power tool battery packs have. Could I still rely on their ability to limit overcharging?
Grateful for any help.