Abnormality detection circuit for power storage device, and power storage device including same
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United States of America Patent
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Jan 23, 2018
Grant Date -
Mar 3, 2016
app pub date -
Apr 12, 2013
filing date -
Apr 12, 2013
priority date (Note) -
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Abstract
An abnormality detection circuit detects an abnormality in a power storage device. A positive electrode terminal and a negative electrode terminal respectively receive a positive electrical potential and a negative electrical potential from a converter. A power storage module includes plural cells connected in series between the positive electrode terminal and the negative electrode terminal. The abnormality detection circuit includes a voltage detection circuit and a control circuit. The voltage detection circuit detects an electrical potential of an intermediate node located at an intermediate position between the positive electrode terminal and the negative electrode terminal on a basis of a ground potential. The control circuit determines an abnormality of the power storage module based on a change in an intermediate ground potential from voltage detection circuit from the ground potential.
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