NOVELTY - The power source contacting device or system for electrical interconnection of the two electrical power sources such as battery-, accumulator- or fuel cell-unit, comprises a contact unit (3a, 3b, 3c) formed from a metal-infiltrated ceramic for an electrically contacting of a contact element (4a, 4a', 4b, 4b') of the electrical power source. The metal-infiltrated ceramic has metallic component and/or the ceramic component. A metal-infiltrated ceramic contact unit is formed in form of a part of a dovetail joint such as dovetail-groove-shape.    USE - The power source contacting device or system is useful for an electrical interconnection of two electrical power sources such as battery-, accumulator- or fuel cell-units, which are useful in automotive area.    ADVANTAGE - The device ensures simple, effective and economical electrical interconnection of the two electrical power sources with improved mechanical stability, rigidity and strength.    DETAILED DESCRIPTION - The power source contacting device or system for electrical interconnection of the two electrical power sources such as battery-, accumulator- or fuel cell-unit, comprises a contact unit (3a, 3b, 3c) formed from a metal-infiltrated ceramic for an electrically contacting of a contact element (4a, 4a', 4b, 4b') of the electrical power source. The metal-infiltrated ceramic has metallic component and/or the ceramic component. A metal-infiltrated ceramic contact unit is formed in form of a part of a dovetail joint such as dovetail-groove-shape. The power source contacting device comprises a connection device for power- and/or positive-fit connection of the metal-infiltrated ceramic-contact units having power source-contact elements. The metal-infiltrated ceramic contact unit has a metallic coating (6a, 6b, 6c), which partially or completely covers a surface of the metal-infiltrated ceramic contact unit. The metallic coating is formed from a metallic component of the metal-infiltrated ceramic. The surface of the metallic coating is partially or completely covered with a protective layer such as a corrosion protection layer. INDEPENDENT CLAIMS are included for:    (1) an electrical power source such as battery-, accumulator or fuel cell-unit;    (2) a method for producing metal-infiltrated ceramic body such as a metal-infiltrated ceramic-contact unit; and    (3) a metal-infiltrated ceramic body e.g. current-carrying component.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-section view of a power source contacting system for electrically contacting of an electrical power sources.    Electrical power source (2, 2')    Contact unit (3a, 3b, 3c)    Contact element (4a, 4a', 4b, 4b')    Terminal connection device (5)    Metallic coating. (6a, 6b, 6c)