Coaxial phase change material heat sink for electric charging cable

A heat sink apparatus configured to be removably attached to an electric vehicle charging cable, the heat sink apparatus comprising:

• a first casing having an outer wall, an inner wall, a first end wall, a second end wall, and an inner space, the inner wall comprising a first cable receiving space;
• a second casing having an outer wall, an inner wall, a first end wall, a second end wall, and an inner space, the inner wall comprising a second cable receiving space;
• a hinge mechanism connected to the first casing and to the second casing enabling the first casing and the second casing to be selectively placed in one of an open position and a closed position in a clamshell arrangement such that, in the closed position, a facing portion of the inner wall of the first casing faces and engages a facing portion of the inner wall of the second casing and causes the first cable receiving space to oppose the second cable receiving space thereby forming a lengthwise tubular bore containing the electric vehicle charging cable when the heat sink apparatus is attached to the electric vehicle charging cable such that the electric vehicle charging cable engages the facing portion of the inner wall of the first casing and the facing portion of the inner wall of the second casing;
• and
• a phase change material contained within the inner space of the first casing and the inner space of the second casing, the phase change material changeable between a first state and a second state when heat generated by the electric vehicle charging cable exceeds a predetermined temperature;
• and
• wherein the inner wall of the first casing and the inner wall of the second casing are constructed of a first material with a high thermal conductivity, and the outer wall of the first casing and the outer wall of the second casing are constructed of a second material with a low thermal conductivity.