The invention relates to a supply unit (10) for generating electric energy for an electric function during an operation of a functional element (6) of a kitchen utensil (5) which can be arranged in a first temperature region (201), comprising a first temperature section (11) for an arrangement in the first temperature region (201), a second temperature section (12) for an arrangement in a second temperature region (202) comprising a temperature difference (200) with respect to the first temperature region (201). Furthermore, the invention relates to a kitchen utensil (5), as well as a kitchen system (1).