BATTERY STATE ESTIMATING DEVICE AND POWER SUPPLY DEVICE
First Claim
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1. A battery state estimating device comprising:
- a first estimating part that estimates internal resistance of a secondary battery at predetermined timing;
a first calculating part that calculates a first ratio of the internal resistance of the secondary battery in an initial state to the internal resistance of the secondary battery at the predetermined timing;
a storage that stores associated data that associates an internal resistance ratio which is a ratio of the internal resistance of the secondary battery in the initial state to the internal resistance of the secondary battery in a degraded state with a full charge capacity ratio which is a ratio of a full charge capacity of the secondary battery in the initial state to the full charge capacity of the secondary battery in the degraded state; and
a second estimating part that estimates the full charge capacity of the secondary battery at the predetermined timing based on the first ratio calculated by the first calculating part with reference to the associated data.
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Abstract
Internal resistance estimating part estimates internal resistance R of a secondary battery. SOH_R calculating part calculates SOH_R based on estimated internal resistance R. Storage stores an SOH_R-SOH_C table. SOH_C calculating part calculates SOH_C based on calculated SOH_R with reference to the SOH_R-SOH_C table. FCC estimating part estimates FCC based on calculated SOH_C.
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Citations
7 Claims
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1. A battery state estimating device comprising:
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a first estimating part that estimates internal resistance of a secondary battery at predetermined timing; a first calculating part that calculates a first ratio of the internal resistance of the secondary battery in an initial state to the internal resistance of the secondary battery at the predetermined timing; a storage that stores associated data that associates an internal resistance ratio which is a ratio of the internal resistance of the secondary battery in the initial state to the internal resistance of the secondary battery in a degraded state with a full charge capacity ratio which is a ratio of a full charge capacity of the secondary battery in the initial state to the full charge capacity of the secondary battery in the degraded state; and a second estimating part that estimates the full charge capacity of the secondary battery at the predetermined timing based on the first ratio calculated by the first calculating part with reference to the associated data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification