Method and apparatus for measuring the state of charge of an ele

Details Method and apparatus for measuring the state of charge of an ele Method and apparatus for measuring the state of charge of an ele

1995-02-14

1996-06-25

Wieder, Kenneth A.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324427, G01N 27416

Patent

active

055303617

ABSTRACT:
The state of charge of an electrochemical storage unit is measured by applying to the electrochemical storage unit (32), a voltage pulse which is less than its nominal voltage, so as to make the storage unit deliver a high discharge current for a short period of time. The level of the voltage pulse is chosen to cause a discharge current that varies monotonically and preferably approximately linearly as a function of the state of charge of the storage unit, so that the state of charge can be unambiguously estimated by measuring the discharge current.

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patent: 4333149 (1982-06-01), Taylor et al.
patent: 4644245 (1987-02-01), Brown
patent: 4719428 (1988-01-01), Liebermann
patent: 4849700 (1989-07-01), Morioka et al.
patent: 4912416 (1990-03-01), Champlin
patent: 4947124 (1990-08-01), Hauser
patent: 5047722 (1991-09-01), Wurst et al.

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