Electrolyte cooling device for use with a metal-air battery

An electrolyte cooling device for use in combination with a multi-cell metal-air battery, said device comprising:

• an electrolyte reservoir divided into a first compartment and a second compartment, said compartments being connected by a valve arranged to periodically allow flow of electrolyte from said first compartment to said second compartment, wherein said first compartment is of smaller volume than said second compartment, and said second compartment comprises a gas-tight vessel in fluid communication with air compression means for effecting electrolyte pumping of cooled electrolyte into each cell, and wherein said air compression means comprises an inlet in said second compartment for supplying bursts of compressed air thereto, whereby at the closure of said valve increased air pressure in said second compartment periodically drives electrolyte therefrom;
• a warm electrolyte liquid flow path leading from an electrolyte-holding volume of each cell of said battery to an inlet port of said first compartment;
• a cooled electrolyte liquid flow path leading from an outlet port of said second compartment to said electrolyte-holding volume of each said cell of said battery;
• at least one cooling fluid conduit passing through said first compartment for extracting heat from hot electrolyte contained therein;
• and
• pumping means for circulating a cooling fluid through said conduit and through radiator means arranged for the disposal therefrom of heat.