Degradation determination method for lithium-ion battery, control method for lithium-ion battery, degradation determination apparatus for lithium-ion battery, control apparatus for lithium-ion battery, and vehicle
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United States of America Patent
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Issued Date -
Mar 4, 2010
app pub date -
Sep 2, 2009
filing date -
Sep 3, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A degradation state of a lithium-ion battery is determined on the basis of information about a voltage change in the lithium-ion battery obtained in a diagnosis mode in which the lithium-ion battery is successively charged and discharged at a constant power value. The constant power value in the diagnosis mode preferably may vary with the power storage amount and the temperature of the lithium-ion battery. As the information, the degree of a voltage drop in the lithium-ion battery obtained during the discharge can be used.
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