I'm working in a discharger of LiPo batteries that must discharge at rates of 100 amp, with batteries of 12 and 24 volt. I've seen some tutorials of "high power control with arduino" but the high power is only 5 or 10 A, and they recommend some FET and/or MOSFET for that currents. My question is: Is it possible to manage 100A currents with those diagrams? and what mosfet or transistor do you recommend for this job?
I am with you, discharge at rates of 100 amp is very very really very high currents, plus LiPo and LiIon fires are very very really very dangerous.
This guy got lucky. Another guy had his house burn to the ground.stackexchange
before u build discharge circuit, u MUST
build protection circuit;-
1. over current protection.
2. over temperature protection.
3. under voltage protection.
4. over voltage protection.
after protection circuit in place, now is time for current sink.
few ways you could do.
1. use High-Current Operational Amplifiers, 100A one is very very really very pricy and if you could get it( u are lucky).
2. use JFET current sink.
change Q1 and Q2 for support high current, and put Q2 on heatsink. connect Vin to output of Arduino DAC.TI App note