I have two li-ion 14500 850mAh protected 14500 Li-ion batteries and a BMS 1S (for example)
I would like to connect the protected 14500 Li-ion batteries in parallel in order to get more current (for twice longer use)
Thought of connecting BMS (mostly for the balancing feature, since they already have protection) so the protected 14500 Li-ion batteries will be balanced.
And this is the point that makes me bit confused- how does the BMS knows the voltage of each protected 14500 Li-ion battery if they are connected in parallel? the BMS 'sees' only one positive and one negative.
If one cell has 3.5 V and the other has 2.8 V, what voltage the BMS will see?
I saw another option for connecting a BMS for each protected 14500 Li-ion battery, but again, if the batteries are connected in parallel what voltage each BMS will see?
In case of series connection it strait-forward because the BMS can compare all the voltages of all the series cell, and than decide to reduce the higher voltage (passive balancer for example)
I'll be happy for explanation of how to connect a BMS for two parallel protected 14500 Li-ion batteries.