BATTERY STATE MEASURING METHOD AND APPARATUS
First Claim
1. A battery state measuring method, comprising:
- a voltage detecting step of detecting a transient open-circuit voltage of a secondary battery at an end of a fixed-length period starting at a termination of charging or discharging of the secondary battery;
a parameter detecting step of detecting one or more parameters indicative of one or more battery states of the secondary battery at or prior to the end of the fixed-length period; and
a prediction step of utilizing a relationship between the transient open-circuit voltage, the one or more parameters indicative of one or more battery states, and a stabilized open-circuit voltage of the secondary battery as observed after the end of the fixed-length period to obtain the stabilized open-circuit voltage that corresponds to the transient open-circuit voltage detected by the voltage detecting step and the one or more parameters detected by the parameter detecting step.
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Abstract
A battery state measuring method includes a voltage detecting step of detecting a transient open-circuit voltage of a secondary battery at an end of a fixed-length period starting at a termination of charging or discharging of the secondary battery, a parameter detecting step of detecting one or more parameters indicative of one or more battery states of the secondary battery at or prior to the end of the fixed-length period, and a prediction step of utilizing a relationship between the transient open-circuit voltage, the one or more parameters indicative of one or more battery states, and a stabilized open-circuit voltage of the secondary battery as observed after the end of the fixed-length period to obtain the stabilized open-circuit voltage that corresponds to the transient open-circuit voltage detected by the voltage detecting step and the one or more parameters detected by the parameter detecting step.
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Citations
7 Claims
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1. A battery state measuring method, comprising:
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a voltage detecting step of detecting a transient open-circuit voltage of a secondary battery at an end of a fixed-length period starting at a termination of charging or discharging of the secondary battery; a parameter detecting step of detecting one or more parameters indicative of one or more battery states of the secondary battery at or prior to the end of the fixed-length period; and a prediction step of utilizing a relationship between the transient open-circuit voltage, the one or more parameters indicative of one or more battery states, and a stabilized open-circuit voltage of the secondary battery as observed after the end of the fixed-length period to obtain the stabilized open-circuit voltage that corresponds to the transient open-circuit voltage detected by the voltage detecting step and the one or more parameters detected by the parameter detecting step. - View Dependent Claims (2, 3)
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4. An battery state measuring apparatus, comprising:
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a voltage detecting unit configured to detect a transient open-circuit voltage of a secondary battery at an end of a fixed-length period starting at a termination of charging or discharging of the secondary battery; a parameter detecting configured to detect one or more parameters indicative of one or more battery states of the secondary battery at or prior to the end of the fixed-length period; and a prediction unit configured to utilize a relationship between the transient open-circuit voltage, the one or more parameters indicative of one or more battery states, and a stabilized open-circuit voltage of the secondary battery as observed after the end of the fixed-length period to obtain the stabilized open-circuit voltage that corresponds to the transient open-circuit voltage detected by the voltage detecting unit and the one or more parameters detected by the parameter detecting unit. - View Dependent Claims (5, 6, 7)
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Specification