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专利名称：METHOD AND APPARATUS FOR
DETERMINING AND INDICATING THE STATEOF CHARGE OF NICKEL CADMIUMBATTERIES
发明人：DENNSTEDT W,DT申请号：US21403071申请日：19711230公开号：US3781657A公开日：19731225
摘要：1371350 Measuring state of charge of Ni-Cd cells. VARTA AG 31 Dec 1971 [2 Jan1971] 61017/71 Heading H1B The state of charge of an Ni-Cd battery is measured andindicated by apparatus responding to the difference between the voltage of a referenceelectrode and the voltage of the positive Ni battery electrodes, this latter voltagedecreasing during- battery discharge. Preferably, the reference electrode is silver giving avoltage of 1170 mV. In the charged state the Ni battery electrode has a voltage of 1320mV and when 70% discharged has a voltage of 1100 mV. As shown in Fig. 2, the referenceelectrode 7 is connected to one end of a resistor 9 having its other end connectedthrough a normally-closed switch 11 to the positive battery terminal 5 connected topositive electrodes 1. A voltmeter 12 reads the voltage difference across the resistor andat a desired value it triggers a transmitter 13 to signal that the battery needs recharging.
申请人：VARTA AG,DT
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