| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a cell short detection method and a device of a battery capable of detecting a cell short of the battery in a comparatively short time. <P>SOLUTION: The cell short detection device includes: an open voltage measuring means 23a-1 for measuring an open voltage of the battery at a prescribed sampling cycle during a prescribed period after finish of charge; an open voltage collection means 23b for collecting each measured open voltage; an assumed open circuit voltage calculation means 23a-2 for determining as an assumed open circuit voltage in each period, a voltage value approached asymptotically by a power approximate expression having a power exponent of -0.5 or about -0.5 approximated based on the open voltage in each period in a plurality of periods determined beforehand in the order of lapse of time relative to the collected open voltages; and a determination means 23a-3 for determining that a cell short is generated, when the assumed open circuit voltage in each period calculated by the assumed open circuit voltage calculation means 23a-2 is lowered with lapse of time and the lowering degree exceeds a reference level determined beforehand. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
