The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1976
Filed:
May. 31, 1972
Jose Giner, Sudbury, MA (US);
Larry L Swette, Belmont, MA (US);
Tyco Laboratories, Inc., Waltham, MA (US);
Abstract
A rechargeable battery comprising two or more electrochemical cells using a reoxidizable nickel oxide at the positive electrode and hydrogen as the negative electrode reactant. The electrodes of the cells are disposed in a common chamber in a battery case and connected so as to series couple the cells between a pair of terminals. The battery case is precharged with hydrogen gas while the positive electrodes are in a discharged state and then is sealed off. Additional hydrogen gas is evolved during charging and the state of charge can be determined by monitoring the gas pressure in the battery case. On discharging the battery, hydrogen is consumed down to the precharge level. The battery has inherent protection against damage from overcharging and overdischarging. The unique overdischarge mechanism prevents battery failure in the event that one cell in the series in discharged prematurely.