METHOD OF PROVIDING AN ELECTROCHEMICAL CELL CASING HAVING AN OPEN-ENDED MAIN BODY PORTION OF GRADE 5 OR 23 TITANIUM CLOSED BY UPPER AND LOWER LIDS OF GRADE 1 OR 2 TITANIUM

摘要

An electrochemical cell, preferably a secondary, rechargeable cell, including a casing comprised of a main body portion having opposed lower and upper open ends closed by respective lower and upper lids is described. The main body portion is composed of titanium Grades 5 or 23 having a relatively high electrical resistivity material while the lower and upper lids are composed of titanium Grades 1 or 2. The lids are preferably joined to the main body portion using laser welding. The combination of these differing titanium alloys provides a cell casing that effectively retards eddy current induced heating during cell recharging.