[engolling]

Hello Werk,

the IC is good for a controlled charging of a Li-Ion Cell. 
But it does not provide a overtemperature and overcurrent protection of the cell, it only protects itself.

So I would recommend at least an extra safety module, search for: battery protection board 1s
If you want to be very safe get a module with temperature sensor or add a thermo fuse attached to the cell.

This should give you 3 stages of safety (which is not to much in my opinion since a 18650 cell in thermal runaway can generate a red glowing metal housing, called can shooting through the air):
1. The cell itself - if it is correctly manufactured it should irreversibly protect itself against overcharging, shortcircuit and overtemperature with a built in circuit interruption device (CID)
2. The charger - protects against overcharging
3. The safety circuit - protects against overcharging, short circuit and overcurrent and maybe against overtemperature.

Since it can happen, that one stage fails, you should have a backup.

If you have further questions about failing mechanisms of Li-Ion batteries or international standards feel free to contact me.

engolling