Metal air electrochemical cell architecture

A battery, comprising:

• a vessel;
• an air electrode;
• a metal electrode;
• a rigid porous current collector supporting the metal electrode within the vessel;
• a liquid electrolyte within a portion of the vessel;
• and
• a pump fluidically coupled to the vessel, the pump configured to pump the liquid electrolyte into and out of the vessel such that the metal electrode is submerged in the liquid electrolyte when the liquid electrolyte is pumped into the vessel to a first level and the metal electrode is removed from the liquid electrolyte when the liquid electrolyte is pumped out of the vessel to a second level.

A battery comprising:

• a vessel;
• an air electrode;
• a metal electrode;
• a rigid porous current collector supporting the metal electrode within the vessel;
• a liquid electrolyte within a portion of the vessel;
• and
• a gas filled bladder, the gas filled bladder configured to displace the liquid electrolyte such that the metal electrode is submerged in the liquid electrolyte when the gas bladder is inflated to a first size and the metal electrode is removed from the liquid electrolyte when the gas bladder is deflated to a second size.

A battery comprising:

• a vessel;
• an air electrode;
• a metal electrode;
• a rigid porous current collector supporting the metal electrode and the air electrode within the vessel;
• a liquid electrolyte within a portion of the vessel;
• and
• one or more lifting system coupled to the rigid porous current collector, the lifting system configured to raise and lower the metal electrode out of and into the liquid electrolyte.

A battery, comprising:

• an anode;
• a first cathode;
• a second cathode;
• and
• an electrolyte, wherein the electrolyte floods a surface of the anode, a surface of the first cathode, and a surface of the second cathode when the battery is operating in a discharge mode and the electrolyte does not contact the second cathode when the battery is operating in a recharge mode.