APPARATUS FOR ESTIMATING BATTERY STATE OF HEALTH
First Claim
1. A battery state of health (SOH) estimation apparatus, comprising:
- a measurement unit, connected to an output end of a battery, provided for measuring a working current, a working voltage and a working temperature of the battery and thus outputting a current signal, a voltage signal and a temperature signal accordingly and correspondingly;
an observer unit, electrically connected to the measurement unit, for observing voltages at the output end and RC parallel circuits of the battery while correspondingly outputting a voltage-error signal relating to the output end, a battery RC internal voltage signal, and a differential current signal;
an adaptive algorithm unit, electrically connected to the measurement, for outputting at least one parameter updating signal so as to enable the updating of corresponding parameters of the battery;
an internal voltage estimation unit, electrically connected to the measurement unit, the observer unit and the adaptive algorithm unit, for estimating internal voltages of the RC parallel circuits while correspondingly outputting an internal voltage estimation signal;
an open-circuit voltage (OCV) estimation unit, electrically connected to the observer unit, for estimating a static open-circuit voltage of the battery while correspondingly outputting an open-circuit voltage signal;
a state-of-health (SOH) estimation unit, electrically connected to the measurement unit, the observer unit and the adaptive algorithm unit, for estimating an SOH of the battery while correspondingly outputting a battery SOH signal; and
a state-of-charge (SOC) estimation unit, electrically connected to the measurement unit, OCV estimation unit and the SOH estimation unit, for estimating a SOC of the battery.
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Abstract
An apparatus for estimating state-of-health (SOH) of a battery is disclosed, which comprises: a measurement unit, for measuring a working current, a working voltage and a working temperature of the battery; an observer unit, for observing voltages at an output end and RC parallel circuits of the battery; an adaptive algorithm unit, for updating parameters of the battery; an internal voltage estimation unit, for estimating the internal voltages of the RC parallel circuits; an open-circuit voltage (OCV) estimation unit, for estimating static open-circuit voltage of the battery; a SOH estimation unit, for estimating an SOH of the battery; and a state-of-charge (SOC) estimation unit, for estimating a SOC of the battery.
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Citations
26 Claims
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1. A battery state of health (SOH) estimation apparatus, comprising:
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a measurement unit, connected to an output end of a battery, provided for measuring a working current, a working voltage and a working temperature of the battery and thus outputting a current signal, a voltage signal and a temperature signal accordingly and correspondingly; an observer unit, electrically connected to the measurement unit, for observing voltages at the output end and RC parallel circuits of the battery while correspondingly outputting a voltage-error signal relating to the output end, a battery RC internal voltage signal, and a differential current signal; an adaptive algorithm unit, electrically connected to the measurement, for outputting at least one parameter updating signal so as to enable the updating of corresponding parameters of the battery; an internal voltage estimation unit, electrically connected to the measurement unit, the observer unit and the adaptive algorithm unit, for estimating internal voltages of the RC parallel circuits while correspondingly outputting an internal voltage estimation signal; an open-circuit voltage (OCV) estimation unit, electrically connected to the observer unit, for estimating a static open-circuit voltage of the battery while correspondingly outputting an open-circuit voltage signal; a state-of-health (SOH) estimation unit, electrically connected to the measurement unit, the observer unit and the adaptive algorithm unit, for estimating an SOH of the battery while correspondingly outputting a battery SOH signal; and a state-of-charge (SOC) estimation unit, electrically connected to the measurement unit, OCV estimation unit and the SOH estimation unit, for estimating a SOC of the battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A battery state of health (SOH) estimation apparatus, comprising:
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a measurement unit, connected to an output end of a battery, provided for measuring a working current, a working voltage and a working temperature of the battery and thus outputting a current signal, a voltage signal and a temperature signal accordingly and correspondingly; an observer unit, electrically connected to the measurement unit, for observing voltages at the output end and RC parallel circuits of the battery while correspondingly outputting a battery RC internal voltage signal, and a differential current signal; an adaptive algorithm unit, electrically connected to the measurement, for outputting at least one parameter updating signal so as to enable the updating of corresponding parameters of the battery; an open-circuit voltage (OCV) estimation unit, electrically connected to the measurement unit, observer unit and the adaptive algorithm unit, for estimating a static open-circuit voltage of the battery while correspondingly outputting an open-circuit voltage signal; and a state-of-health (SOH) estimation unit, electrically connected to the measurement unit and the OCV estimation unit, for estimating an SOH of the battery while correspondingly outputting a battery SOH signal. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification