Electric machine module cooling system and method

An electric machine module comprising:

• a housing at least partially defining a machine cavity, the housing further including a sleeve member coupled to at least one end cap, the sleeve member comprising
• a first axial end and a second axial end,
• a first coolant jacket being disposed substantially within at least a portion of the sleeve member,
• a second coolant jacket being disposed substantially within at least a portion of the sleeve member and being at least partially axially adjacent to the first coolant jacket, and
• a central region being disposed within the sleeve member, the central region being positioned between at least a portion of the first coolant jacket and the second coolant jacket, the central region further comprising circumferentially arranged first regions and second regions;
• and
• an electric machine positioned substantially within the machine cavity and at least partially enclosed by the housing, the electric machine including a stator assembly, the electric machine positioned within the machine cavity so that at least some portions of the stator assembly are substantially circumscribed by portions of the first coolant jacket and the second coolant jacket.

A method of manufacturing an electric machine module, the method comprising:

• forming a sleeve member so that the sleeve member includes at least one coolant jacket, a first axial end, and a second axial end;
• coupling at least one seal element to the sleeve member substantially adjacent to at least one of the first axial end and the second axial end to substantially seal the at least one coolant jacket, wherein at least a portion of the at least one coolant jacket comprises a greater radial width substantially adjacent to the at least one seal element relative to portions of the at least one coolant jacket that are substantially distal to the at least one seal element;
• disposing at least one coolant inlet through a portion of the sleeve member so that the at least one coolant inlet is in fluid communication with the at least one coolant jacket;
• coupling at least one end cap to the sleeve member to substantially form the housing, the housing at least partially defining a machine cavity;
• and
• positioning a stator assembly within the machine cavity so that the at least one coolant jacket substantially circumscribes at least a portion of the stator assembly.