Abstract: The present disclosure relates to an electrochemical cell comprising a first separator plate, a second separator plate and a capacitor designed to store and release electrical energy. Furthermore, the present disclosure relates to an electrochemical system comprising a plurality of stacked electrochemical cells. The electrochemical system may be a fuel cell stack or an electrolyzer. The capacitor is arranged between an outer edge region of the first separator plate and an outer edge region of the second separator plate. The first separator plate has a first holding structure for holding the capacitor and/or the second separator plate has a second holding structure for holding the capacitor.

Abstract: A valve, an oil separator, and a ventilation system are described. These are used particularly in internal combustion engines, for example for separating oil mist or oil droplets from blow-by gases (crankcase gases). In particular a valve which can be used for example as a bypass valve in a ventilation system is described.