Cooling system for electric propulsion system of watercraft

A boat, comprising:

• a hull;
• a propulsion system disposed in the hull and configured to propel the hull;
• a cooling system disposed in the hull and configured to cool one or more components of the propulsion system, the cooling system including:
• at least one cooler disposed inside the hull and closed to the exterior of the hull, the cooler configured for the exchange of thermal energy between a flow of coolant in the at least one cooler and a fluid flow outside of the hull via a hull wall disposed between the flow of coolant and the fluid flow;
• and one or more coolant passages extending from the at least one cooler defining at least one coolant loop, the one or more coolant passages configured to deliver the flow of coolant from the at least one cooler to the one or more components disposed along the at least one coolant loop to cool the one or more components, and return the flow of coolant to the at least one cooler, wherein the at least one cooler is disposed at a chine of the hull;
• and wherein a chine closure is secured to an interior of the hull to enclose a chine recess defined by the chine, the enclosed chine recess defining a cooler of the at least one cooler.

A method of cooling one or more propulsion system components of a boat, comprising:

• urging a coolant flow through at least one chine cooler disposed inside a hull of the boat and abutting an external hull wall;
• exchanging thermal energy between the coolant flow in the at least one chine cooler and a fluid flow outside of the hull via the external hull wall disposed between the flow of coolant and the fluid flow;
• directing the coolant flow from the at least one chine cooler along one or more coolant passages defining at least one coolant loop;
• cooling the one or more propulsion system components disposed along the at least one coolant loop via thermal energy exchange between the coolant flow and the one or more propulsion system components;
• and
• urging the coolant flow from the coolant loop to the at least one chine cooler;
• wherein the at least one chine cooler is disposed at a chine of the hull;
• and
• wherein a chine closure is secured to an interior of the hull to enclose a chine recess defined by the chine, the enclosed chine recess defining a chine cooler of the at least one chine cooler.