Method of monitoring the internal impedance of an accumulator ba

Details Method of monitoring the internal impedance of an accumulator ba Method of monitoring the internal impedance of an accumulator ba

1993-09-17

1995-10-10

Kincaid, Kristine L.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

320 31, 320 48, 324430, H01M 1048

Patent

active

054573777

ABSTRACT:
A method of monitoring the internal impedance of an accumulator battery in an uninterruptible power supply, and a UPS. In accordance with the invention, during the discharge of the battery to the load, the load current induced by the load and passing through the battery is measured or calculated, and the corresponding AC voltage component obtained on the battery voltage is measured, the value for the internal impedance of the battery being calculated from these values. The obtained impedance value is compared to a predetermined reference value to determine the condition of the battery.

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Xia, "Ordinary Meter Measures Battery Resistance", EDN-Design Ideas (Jun. 24, 1993).

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