I am going to develop a standalone system and use Li-ion battery for the power source.
In addition, I need to connect several packs of Li-ion battery in parallel to maximize the standby period.
(P.S, in this system, there is no charging functions as the batteries will be received for charging.)
And my concern is the system should be implemented a battery management system for a batter energy control and safety.
Safety is the mainly concerning point as I think it is dangerous to connect those packs of batteries in parallel, am I right?
Is there any controlling ICs or circuits of such kind of BMS?
I have no ideas for that...
An ORing circuit should work for this application as you are trying to maximise standby rather than the peak current from the battery pack. There is a good example using the AD8619 opamp and a MOSFET to overcome the losses associated with using a diode at http://www.edn.com/design/analog/4368307/Use-op-amps-to-make-automatic-ORing-power-selector