I need to use a capacitor in a DC circuit where it would store somewhat higher voltage (hundreds of volts). The cheapest way to do that (in my case) is to connect multiple electrolytic capacitors in series, because their maximum voltage is lower than the voltage I want to store. In theory, it should work well with non-polarized capacitors. I am not sure what would happen if the output gets shorted (by accident – broken off wire etc.). I think that some of them will discharge first because of manufacturing differences and they will be discharged to other capacitors (that will be negatively biased now).
Could this happen with real-world capacitors? Is it sensible to connect a diode in parallel with each capacitor to protect it from being charged negatively?