A20-SOM with Li-Ion without BMS protection?

[mavstuff]

Hi guys!
Can one use Olimex A20-SOM board with bare Li-Ion battery without BMS protection board?
I believe AXP209 onboard controller is kind of BMS protection by itself.
Any thoughts about this? Thank you

[LubOlimex]

It is not a good idea. My experience shows that it is dangerous. Most Li-Po batteries should have some sort of undervoltage or overvoltage protection (unless you stripped it). Here is a battery controller (stripped from one of our Li-Po batteries):



When picking a battery consider something like these (in some of the pictures you can see the controller):

https://www.olimex.com/Products/Power/Lipo-battery/

[mavstuff]

Thanks for the information. I am using external 7A BMS curcuit currently