Geometry change diffusion tube for metal-air batteries

摘要

A ventilation system for metal-air battery cells having collapsible isolation passageways for controlling ambient airflow to the oxygen electrode of the metal-air battery. The ventilation system has at least one inlet isolation passageway and at least one outlet isolation passageway. The isolation passageways normally remain in a collapsed position to restrict airflow when an air mover is turned off. The isolation passageways may be configured into an expanded position in response to airflow generated by the air mover. In the expanded position, the inlet isolation passageway permits ambient air to flow across the oxygen electrode and the outlet isolation passageway permits oxygen depleted air to be expelled.