Stator of a coolant drive, electric motor, refrigerant drive and method of producing a stator

A stator of an electric motor, the stator comprising:

• a stator stack having a plurality of stator teeth and coils disposed on said stator teeth defining a multiphase stator winding;
• a plurality of phase connectors;
• a contact apparatus for interconnecting axially directed coil ends of said coils with said plurality of phase connectors, said contact apparatus having an interconnection ring placed onto said stator stack on an end side and integrated busbars for interconnecting said coils with said plurality of phase connectors, said contact apparatus further having a ring cover disposed onto said interconnection ring and contact tabs, said contact apparatus further defined by:
• said interconnection ring having a plurality of axial leadthrough openings formed therein corresponding to a number of said coil ends, and through said axial leadthrough openings said coil ends are led through perpendicularly;
• said integrated busbars disposed on said end side with said contact tabs and disposed in a region of said axial leadthrough openings, and to each of said contact tabs one of said coil ends is contacted;
• said ring cover covering said coil ends and said contact tabs;
• and
• said ring cover and said interconnection ring defining a cavity therebetween, said cavity filled with an electrically insulating potting material.