Energy supply module

The invention relates to a power supply module (2,2 ') for supplying an electrical device (1,1') with energy, wherein the power supply module (2,2 ') consists of a housing (3,3'), in whose interior at least one electrochemical energy store (4,4 '), a connected to the at least one electrochemical energy storage DC / AC converter (5,5'), and a coil (6,6 ') are arranged. According to the invention, the housing of the energy supply module is completely and hermetically enclosed by electrically insulating material or the housing (3, 3 ') is formed from an electrically insulating material which completely and hermetically encloses the interior, wherein by means of the coil (6, 6') of the Power supply module (2,2 ') contactlessly energy to a device coil (7,7' ) of the electrical device (1,1 ') is transferable. The power supply module has switching means (11, 11 ', 12', 13 '), by means of which the power supply module (2, 2') switches between an idle state, in which the coil (6, 6 ') of the energy supply module (2, 2') is de-energized, and an activated state in which the coil (6,6 ') of the power supply module (2,2') can transmit energy to the device coil (7,7 ') of the electrical device (1,1'), can be switched ,