BATTERY STATE-OF-CHARGE CALCULATION DEVICE
First Claim
1. A battery state-of-charge calculation device, comprising:
- a first state-of-charge calculation unit which outputs a first state of charge calculated on the basis of voltage data;
a second state-of-charge calculation unit which outputs a second state of charge calculated on the basis of current data;
an impedance voltage calculation unit which calculates an impedance voltage value on the basis of an effective state of charge and the current data;
a static determination unit which determines that the impedance voltage value remains static for a predetermined time or longer in a range identified by a predetermined threshold value and outputs the determination result; and
a state-of-charge decision unit which, on the basis of the determination result, outputs the first state of charge as the effective state of charge where the impedance voltage value is static and outputs the second state of charge as the effective state of charge where the impedance voltage value is not static.
1 Assignment
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Accused Products
Abstract
The battery state-of-charge calculation device (100) is provided with a SOCV calculation unit (5) which outputs a first state of charge calculated based on voltage data, a SOCI calculation unit (6) which outputs a second state of charge calculated based on current data, an estimated impedance voltage calculation unit (12) which calculates an impedance voltage value based on an effective state of charge and the current data, a static determination unit (7) which determines that the impedance voltage value remains static for a predetermined time or longer in a range identified by a predetermined threshold value and outputs the determination result; and a SOC decision unit (20) which, based on the determination result, outputs the first state of charge as the effective state of charge where the impedance voltage value is static and outputs the second state of charge as the effective state of charge where the impedance voltage value is not static.
20 Citations
6 Claims
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1. A battery state-of-charge calculation device, comprising:
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a first state-of-charge calculation unit which outputs a first state of charge calculated on the basis of voltage data; a second state-of-charge calculation unit which outputs a second state of charge calculated on the basis of current data; an impedance voltage calculation unit which calculates an impedance voltage value on the basis of an effective state of charge and the current data; a static determination unit which determines that the impedance voltage value remains static for a predetermined time or longer in a range identified by a predetermined threshold value and outputs the determination result; and a state-of-charge decision unit which, on the basis of the determination result, outputs the first state of charge as the effective state of charge where the impedance voltage value is static and outputs the second state of charge as the effective state of charge where the impedance voltage value is not static. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification