Electronic positive displacement fluid pump and method of encapsulating the same

A fluid pump comprising:

• a motor section;
• a pumping section driven by the motor section;
• a unitary, single-piece, elongated shell having opposite first and second open ends;
• a circumferential bead formed in the shell, the bead including a radial protrusion;
• a sleeve received in the first open end of the shell, the sleeve being disposed between the bead and the first open end;
• a heat sink cap received in the first open end and engaging the sleeve;
• the shell including a crimp formed at the first open end, the crimp contacting the heat sink cap and retaining the heat sink cap in the first open end;
• and
• the shell including a lip formed at the second open end;
• the pumping section being disposed at least partially within the shell adjacent the lip;
• the motor section being disposed within the shell adjacent to the pumping section;
• and
• a controller disposed within the sleeve adjacent the heat sink cap.