foxOnTheRun
New Member
Hi, I'm trying to sort out a building block circuit out of this idea:
Given a battery, and a bank of supercaps (serialized and equalized) from where could I start looking up to find a building block to wire the two objects toghether so that, during steady time loads, I use power from the battery, and then during fast transient of high consumption I can switch over to the supercap storage?
_ I could hook two independant SEPIC converter to the two unit to derive the voltage I need for the load, but then how could I balance absorpion from the two DC bus line? it's never good to parallelize two power unit bare naked..
or
_ I could have a single SEPIC converter which is feeded by either the battery or supercap, but not just as you would do with a relay or a couple of diodes, I was thinking at some active switching schema, maybe some combination of mosfets with a asymmetrical turn-ON-OFF time?
I think overall I am missing a basic building block in electronic domain, sort of balancer, but before it, not just the plain circuit solution, I really mean how is possible in the world to even balance absorption from two identical batteries? right, starting from a basic exercize, give two AA 1.5v batteries, how would you accomodate them so that you could decide:
_ 100% power from battery 1 - no power from battery 2
_ 20% power from battery 1 - 80% power from battery 2
.. and so on? we could easily put 3 current monitor, 3 voltage monitor, a 16F690 pic (first to my mind) and write a quick looping C program and implementing a simple polling stepped response algoritm to trigger absorption from one or the other battery (outputting one or two reference pwm signals example), given sensor input and some kind of actuating signals.
But the question is.. I got all the base blocks (they are all self explanatory) but looking at the circuit, what should I enforce in the critical node to balance the flowing of currents? I simply cannot get an answer..
Are you thinking of playing with output voltages? wouldn't I risk of dissipating power if I mess with voltages outside the schema of a standard converter? again, many stardard brick power converter (traco, densei-lambda) prohibits from conneting them in parallel connections due to Vsense pins which would trigger some kind of self response..
I'm really baffle! Any ideas?
Tnx.
Given a battery, and a bank of supercaps (serialized and equalized) from where could I start looking up to find a building block to wire the two objects toghether so that, during steady time loads, I use power from the battery, and then during fast transient of high consumption I can switch over to the supercap storage?
_ I could hook two independant SEPIC converter to the two unit to derive the voltage I need for the load, but then how could I balance absorpion from the two DC bus line? it's never good to parallelize two power unit bare naked..
or
_ I could have a single SEPIC converter which is feeded by either the battery or supercap, but not just as you would do with a relay or a couple of diodes, I was thinking at some active switching schema, maybe some combination of mosfets with a asymmetrical turn-ON-OFF time?
I think overall I am missing a basic building block in electronic domain, sort of balancer, but before it, not just the plain circuit solution, I really mean how is possible in the world to even balance absorption from two identical batteries? right, starting from a basic exercize, give two AA 1.5v batteries, how would you accomodate them so that you could decide:
_ 100% power from battery 1 - no power from battery 2
_ 20% power from battery 1 - 80% power from battery 2
.. and so on? we could easily put 3 current monitor, 3 voltage monitor, a 16F690 pic (first to my mind) and write a quick looping C program and implementing a simple polling stepped response algoritm to trigger absorption from one or the other battery (outputting one or two reference pwm signals example), given sensor input and some kind of actuating signals.
But the question is.. I got all the base blocks (they are all self explanatory) but looking at the circuit, what should I enforce in the critical node to balance the flowing of currents? I simply cannot get an answer..
Are you thinking of playing with output voltages? wouldn't I risk of dissipating power if I mess with voltages outside the schema of a standard converter? again, many stardard brick power converter (traco, densei-lambda) prohibits from conneting them in parallel connections due to Vsense pins which would trigger some kind of self response..
I'm really baffle! Any ideas?
Tnx.