Apparatus and method for utilizing polarization voltage to deter

Details Apparatus and method for utilizing polarization voltage to deter Apparatus and method for utilizing polarization voltage to deter

1991-05-22

1993-05-25

Strecker, Gerard R.

Electricity: measuring and testing

Electrolyte properties

Using a battery testing device

324426, 320 48, G01N 27416, A02J 700

Patent

active

052143856

ABSTRACT:
An apparatus for measuring charge state of a battery having multiple cells includes a transmitter that is connected to the battery to apply a test signal across the battery. This test signal is preferably a continuous square wave signal having a frequency less than 3 Hz. The test signal alternates between a voltage adequate to charge the battery and a lower voltage, and the charging voltage is retained for a time sufficient to allow a polarization voltage to develop across individual cells. A receiver is connected to the cell to monitor the polarization voltage across a cell as it develops in response to the test signal. This polarization voltage can be monitored for example using a DC voltmeter, or by displaying the voltage versus time waveform. In either case an accurate indication of the state of the charge of the cell is provided.

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"Handbook of Batteries & Fuel Cells", edited by David Linden, pp. 14-10-14-12.

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