Electric machine with cooling pipe coiled around stator assembly

An electric machine module comprising:

• a housing including at least one end cap coupled to a central member and defining at least a portion of a machine cavity,
• the housing including a first axial end and a second axial end,
• the central member including at least a portion of a coolant pipe, the coolant pipe including end portions extending at least partially through the at least one end cap;
• an electric machine including a stator assembly, at least a portion of the electric machine positioned within the housing and at least partially enclosed by the housing so that the coolant pipe is substantially coiled around at least a portion of an outer perimeter of the stator assembly;
• wherein the coolant pipe extends an axial distance from a point substantially adjacent to the first axial end to a point substantially adjacent to the second axial end and the end portions are adjacent to the point substantially adjacent to one of the first axial end and the second axial end;
• and
• wherein the coolant pipe comprises a reverse spiral orientation so that the coolant pipe is coiled around the stator assembly substantially from the first axial end to the second axial end in a first direction and then coiled back around the stator assembly substantially from the second axial end to the first axial end in a second direction.