Waste heat control for aircraft fuel cell

An aircraft, comprising:

• at least one of an aircraft motor or an aircraft motor drive;
• a metal-air fuel cell;
• and
• a waste heat transfer system including a diverter system configured to thermally couple the metal-air fuel cell and the at least one of the aircraft motor or the aircraft motor drive;
• and
• a control system configured to operate the waste heat transfer system to selectively transfer waste heat from the at least one of the aircraft motor or the aircraft motor drive to the metal-air fuel cell, wherein the control system is configured to operate the diverter system for the waste heat in response to determining a take-off event is occurring.

An aircraft, comprising:

• at least one of an aircraft motor or an aircraft motor drive;
• an aluminum-air fuel cell;
• a waste heat transfer system configured to thermally couple the aluminum-air fuel cell and the at least one of the aircraft motor or the aircraft motor drive;
• and
• a control system configured to operate the waste heat transfer system to selectively transfer waste heat from the at least one of the aircraft motor or the aircraft motor drive to the aluminum-air fuel cell,
• wherein the waste heat transfer system includes a liquid-to-liquid heat exchanger, a liquid-to-air heat exchanger, and a diverter system.