Electric Fuel (e.f.l.) Ltd.

Boris Dechovich

Yehuda Harats

Menachem J Korall

Jonathan Goldstein

Binyamin Koretz

The invention provides an electrolyte cooling device for use in combination with a multi-cell metal-air battery, the device comprising an electrolyte reservoir divided into a smaller compartment and a larger compartment, the compartments being connected by a valve arranged to periodically allow flow of electrolyte from the smaller compartment to the larger compartment; a warm electrolyte liquid flow path leading from an electrolyte-holding volume of each cell of the battery to an inlet port of the smaller compartment; a cooled electrolyte liquid flow path leading from an outlet port of the larger compartment to the electrolyte-holding volume of each said cell of the battery; at least one cooling fluid conduit passing through the smaller compartment; and pumping means for circulating a cooling fluid through the conduit and through radiator means arranged for the disposal therefrom of heat.

Electrolyte cooling device for use with a metal-air battery

The invention provides a multi-cell, sealed, cooled, zinc-oxygen battery, comprising a container containing a plurality of bi-cells, each cell having a housing provided with two major surfaces and accommodating a pair of oppositely-disposed, spaced-apart, air-permeable, liquid-impermeable cathodes in the form of oxygen-reduction electrodes, and defining between themselves a cavity configured to accommodate an anode of the battery and electrolyte, substantial portions of the major surfaces of the housing being removed, thus exposing major portions of the oxygen-reduction electrodes, and wherein two major surfaces are partly recessed in such a way as to form, in conjunction with a similarly-recessed outer surface of a major wall of an adjacent cell housing, an inter-cathode gas space between adjacent cells with a plurality of oxygen access openings leading thereto; an anode positioned within the cavity and comprising an active zinc anode component compacted into a rigid static bed of active anode material of tight interparticulate structure, the anode being provided with at least one internal fluid-carrying passage with inlet and outlet means, for circulating cooling fluid therethrough; a dead space volume between inner surfaces of the housing and the plurality of bi-cells; and pressurized oxygen supply means for feeding oxygen to the dead space volume, for consumption in the inter-cathode gas spaces.

Cooled zinc-oxygen battery

A modular cell for a multi-cell metal-air battery system, comprises a relatively flat cell housing having two major surfaces and accommodating a pair of oppositely disposed, spaced-apart, air-permeable, liquid-impermeable cathodes in the form of air electrodes defining between themselves a space open towards the upper edges of the cell housing and closed at the lateral edges and the bottom of the cell housing, the space being configured to accommodate an anode of said battery, substantial portions of the major surfaces of the housing being removed, thus exposing major portions of the air electrodes. The two major surfaces of the housing are partly recessed in such a way as to form, in conjunction with a similarly recessed outer surface of a major wall of an adjacent cell housing, an air space with air access and exits, and the exposed portions of the air electrodes are supported and reinforced by ribbing constituted at least by a plurality of slender rails, which rails define ducts for guiding a flow of air across the portions of the air electrodes from the air access toward the exits. An upper portion of at least one major surface of the housing is provided with a fluid flow channel having an inlet and an outlet provided in a wall of a minor surface of the housing for guiding a cooling fluid introduced into the inlet across an upper area of the cell, in heat exchange with electrolyte contained in upper portions of the open space, via an inner wall of the housing portion.

Cell for a metal-air battery

The invention provides a multi-cell, sealed, zinc-oxygen battery, comprising a container containing (a) a plurality of bi-cells, each cell having a housing provided with two major surfaces and accommodating a pair of oppositely-disposed, spaced-apart, air-permeable, liquid-impermeable cathodes in the form of oxygen-reduction electrodes, and defining between themselves a cavity configured to accommodate an anode of the battery and electrolyte, substantial portions of the major surfaces of the housing being removed, thus exposing major portions of the oxygen electrodes, and wherein the two major surfaces are partly recessed in such a way as to form, in conjunction with a similarly-recessed outer surface of a major wall of an adjacent cell housing, an inter-cathode gas space between adjacent cells with a plurality of oxygen access openings leading thereto; (b) a dead space volume between inner surfaces of the housing and the plurality of bi-cells; and (c) pressurized oxygen supply means for feeding oxygen to the dead space volume, for consumption in the inter-cathode gas spaces.

Growing community of inventors

Jerusalem, Israel

Boris Dechovich