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:
Jan. 27, 1981
Filed:
Oct. 10, 1978
Eric Patry, Nogent sur Marne, FR;
Pierre Belot, Pavillons sous Bois, FR;
Saft-Societe des Accumulateurs Fixes et de Traction, Romainville, FR;
Abstract
After a cell has discharged a quantity Q.sub.o of electricity, charging is controlled by measuring the quantity k Q.sub.o of electricity supplied to the cell, where k is the recharging coefficient and greater than 1. The value of k is varied as an increasing function of the quantity Q.sub.o of electricity discharged, in other words as an increasing function of the relative depth of discharge Q.sub.o /C of the storage cell, where C is its capacity. The state of charge is monitored by generating a magnitude g which is a function of the charging or discharging current. This is done by algebraically integrating the current I over time while using scaling coefficients a=g/I of different values during charging and during discharging. The value of a is varied during charging so that its average value over a complete recharging operation is a decreasing function of the initial depth of discharge from which the recharging operation starts recharging.