Battery monitoring system
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United States of America Patent
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Feb 26, 2019
Grant Date -
Jan 25, 2018
app pub date -
Jun 29, 2017
filing date -
Jul 21, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A battery monitoring system includes: an input circuit to which voltage signals of battery cells are inputted; a multiplexer selecting a battery cell for voltage detection from the battery cells, selecting voltage signals inputted from the input circuit, and outputting the selected voltage signals; first and a second voltage measuring circuits simultaneously measuring voltages based on the voltage signals in first and second routes outputted from the multiplexer; a comparator comparing measurement results by the first voltage measuring circuit and by the second voltage measuring circuit; and a control unit that judges, on a basis of a comparison result by the comparator, at least one of a voltage of each battery cell, an operation check of equalizing the voltages of the battery cells, a presence or absence of a disconnection of a detection line of each battery cell, and a presence or absence of a failure in the multiplexer.
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