> Notably the battery should not be charged below about 5C. If you do, it will be permanently damaged.
This depends on the specific battery chemistry. The
BMS should prevent the charging scenarios which would damage the battery.
For some it's 0C not 5C. Some can handle charging below 0C.
Isn't that a stock feature on pretty much every chip? I mean, if you've got a temperature sensor for overtemperature protection, including undertemperature protection is trivial.
Even the cheapest chips from TI and ST seem to include it. And modern cell phones often advertise extra-fast 20W+ charging, so I doubt they're using the cheapest chips.
This depends on the specific battery chemistry. The BMS should prevent the charging scenarios which would damage the battery. For some it's 0C not 5C. Some can handle charging below 0C.