Energy Development Associates

Gary L Henriksen

Curtis C Whittlesey

Satyanarayana Kodali

Bhim S Singh

Walter B Keryluk

Merle T Wolff

An electrode assembly is described which generally comprises a first electrode, a pair of second planar electrodes, a generally rectangular frame member for supporting each of the second electrodes substantially along three sides thereof, the rectangular frame member having a pair of spaced inwardly extending channels through which said second electrodes slide into and which mask the edges of said second electrodes along the three supported sides, and a laterally displaced integrally formed, inwardly facing elongate channel along an unsupported side of the second electrode which is adjacent to an external face of one of the second electrodes and shaped to receive one side of the first electrode while masking the adjacent second electrode along the unsupported side thereof, a generally elongated frame member coupled to the rectangular frame member between the second electrodes along the unsupported edge thereof, and conduit means associated with the elongated frame member for conveying fluid to the cavity between the second electrodes.

Comb-type bipolar stack

An improved electrolyte circulation subsystem which reduces and minimizes the effect of parasitic currents in secondary batteries having a plurality of cells connected electrically in series and a common electrolyte in communication with the cells is described. The improved electrolyte circulation subsystem includes means for pumping an electrolyte, and manifold means for conveying electrolyte to a plurality of cells connected electrically in series. The manifold means generally comprises an outer tube formed with an outlet port at each end thereof, and an inner tube concentrically disposed within the outer tube generally along one-half of the outer tube length. The inner tube is in fluid communication with the pumping means at a first end thereof and is in fluid communication with the outer tube at a second end thereof. The inner tube also has means associated with the second end for generally equally diverting the flow of the electrolyte through the inner tube to each of the outlet ports of the outer tube. The electrolyte circulation subsystem also includes a separate conduit means in fluid communication with each of the outlet ports of the outer tube for individually distributing electrolyte from the outlet tube to generally one-half of the cells.

Electrolyte circulation subsystem

This disclosure relates to a zinc halogen battery electrolyte composition containing an additive providing improved zinc-on-zinc recyclability. The improved electrolyte composition involves the use of a lead additive to inhibit undesirable irregular plating and reduce nodular or dendritic growth on the electrode surface. The lead-containing electrolyte composition of the present invention appears to influence not only the morphology of the base plate zinc, but also the morphology of the zinc-on-zinc replate. In addition, such lead-containing electrolyte compositions appear to reduce hydrogen formation.

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Troy, MI, United States of America

Gary L Henriksen