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:
Sep. 15, 1987
Filed:
Jan. 17, 1986
Leopold J Johnson, Valley Center, CA (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
A lithium battery is provided with an energy monitor that continuously inates the energy remaining in the battery. An electrolytic coulometer is connected in series with the battery and has a cantilevered cathode which increases its mass in proportion to the total amount of current that flows from the battery. Since the mass of the cathode and hence its resonant frequency changes in proportion to the total current, a mechanical transducer in contact with the electrolytic coulometer causes the cantilevered cathode to resonate at different frequencies which is monitored to provide a continuous reading of remaining battery energy.