Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1978-10-10
1981-01-27
Hickey, Robert J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 48, H02J 704
Patent
active
042478120
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.
REFERENCES:
patent: 3735234 (1973-05-01), Godard
patent: 3898548 (1975-08-01), Perelle et al.
patent: 3906329 (1975-09-01), Bader
patent: 4012681 (1977-03-01), Finger et al.
patent: 4153867 (1979-05-01), Jungfer
Belot Pierre
Patry Eric
Hickey Robert J.
Saft-Societe des Accumulateurs Fixes et de Traction
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