I want to create a hybrid battery module to start a car engine. I intend to use a supercapacitor bank in parallel with a normal car battery.
The bank is composed of 6 capacitors mounted on a balancing module (bought from Aliexpress) and has 16.2V (6x2.7V; 350 farads/capacitor). The car battery is a normal 12V lead acid battery.
I am concearned that by connecting the two sources in parallel these will discharge one into another. What safety precautions must I take? Would placing a diode between the two sources prevent mutual discharging? Can someone offer me some advices on how to safely proceed with this? Did anybody make something similar?