Apparatus and method for diagnosing abnormality in cell balancing circuit
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United States of America Patent
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Apr 28, 2015
Grant Date -
Sep 11, 2014
app pub date -
May 27, 2014
filing date -
Feb 19, 2013
priority date (Note) -
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Abstract
Disclosed is an apparatus and method for diagnosing an abnormality in a cell balancing circuit in a battery pack including a plurality of cells corresponding to each cell balancing circuit. The present disclosure turns off cell balancing switches included in a cell balancing circuit to be diagnosed and an adjacent cell balancing circuit among the cell balancing circuits. Also, the present disclosure stores a voltage value between nodes of the cell (hereinafter referred to as a ‘diagnosis voltage value’) by turning on the cell balancing switch of the cell balancing circuit to be diagnosed. Also, the present disclosure calculates a difference value between adjacent cell voltage values (hereinafter referred to as a ‘cell difference value’) and a difference value between adjacent diagnosis voltage values (hereinafter referred to as a ‘diagnosis difference value’).
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