ALEXANDRIA, Va., May 19 -- United States Patent no. 12,633,605, issued on May 19, was assigned to SOUTH 8 TECHNOLOGIES INC. (San Diego).

"High ambient pressure tolerant battery cell" was invented by Cyrus S. Rustomji (San Diego) and Elena Machado (San Diego).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed herein is a design for an electrochemical energy-storage cell that can withstand high-pressure environments. The cell has a gas-tight cell housing that encloses an electrolyte in contact with an electrode assembly. The cell housing defines a cell volume. A pressure-equalizing member is connected to the cell housing and constructed to displace a portion of the cell volume to equalize a pressure diffe...