Abstract: There is an energy supply device comprising: a cell unit for receiving and/or delivering electrical energy in an operating state of the energy supply device. The cell unit comprises a first connection element and a second connection element, which transmit electrical energy; a tempering apparatus for tempering the cell unit via a medium flow (MS) in a channel which guides the medium flow (MS) along at least one flow direction. The tempering apparatus forms, a first coupling with the first connection element and a second coupling with the second connection element, and is configured to galvanically separate from each other the first connection element and the second connection element between the first coupling and the second coupling via an insulating section of the channel, to avoid electrical contacting of the first and second connection elements. There is also a method for setting the temperature of an energy supply device.

Abstract: An energy supply device for an electric machine includes a plurality of cell units which can be contacted with each other. At least one cell unit of the plurality of cell units has at least one contact element for transmitting electrical energy, which is assigned to a contact area of the at least one cell unit. The at least one cell unit has at least one protective element which is formed from at least one reaction material. The at least one protective element is configured to form a connection with the at least one contact element and/or with the contact area, to shield at least one contact element section of the at least one contact element and/or at least one contact area section of the contact area from a medium of an environment of the energy supply device.