BATTERY CONTROLLER AND VEHICLE SYSTEM
First Claim
1. A battery controller comprising:
- a closed-circuit voltage detection unit that measures a terminal-to-terminal voltage of a secondary battery to acquire a closed-circuit voltage;
an open-circuit voltage calculation unit that performs calculation on the basis of the closed-circuit voltage to acquire an open-circuit voltage;
a time point setting unit that calculates a voltage difference obtained by subtracting the open-circuit voltage from the closed-circuit voltage and sets a first time point and a second time point at which an absolute value of the voltage difference is equal to or smaller than a predetermined value;
a cumulative current amount calculation unit that obtains a cumulative current amount which is a time integrated value of a current flowing through the secondary battery in a period between the first time point and the second time point;
a SOC difference calculation unit that calculates a difference between SOC at the first time point and SOC at the second time point; and
a storage capacity calculation unit that divides the cumulative current amount by the SOC difference to calculate a storage capacity of the secondary battery.
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Accused Products
Abstract
A battery controller capable of increasing the number of chances of being able to acquire information on a secondary battery storage capacity and a vehicle system having the battery controller mounted thereon are provided. A battery controller 120 mounted on a vehicle system 200 includes a time point setting unit 153 that sets a first time point at which a first voltage difference dVa (=CCVa−OCVa) which is a difference obtained by subtracting a first open-circuit voltage OCVa from a first closed-circuit voltage CCVa is obtained and a second time point at which a second voltage difference dVb (=CCVb−OCVb) which is a difference obtained by subtracting a second open-circuit voltage OCVb from a second closed-circuit voltage CCVb is obtained and an absolute value of the difference from the first voltage difference dVa is equal to or smaller than a predetermined value.
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Citations
16 Claims
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1. A battery controller comprising:
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a closed-circuit voltage detection unit that measures a terminal-to-terminal voltage of a secondary battery to acquire a closed-circuit voltage; an open-circuit voltage calculation unit that performs calculation on the basis of the closed-circuit voltage to acquire an open-circuit voltage; a time point setting unit that calculates a voltage difference obtained by subtracting the open-circuit voltage from the closed-circuit voltage and sets a first time point and a second time point at which an absolute value of the voltage difference is equal to or smaller than a predetermined value; a cumulative current amount calculation unit that obtains a cumulative current amount which is a time integrated value of a current flowing through the secondary battery in a period between the first time point and the second time point; a SOC difference calculation unit that calculates a difference between SOC at the first time point and SOC at the second time point; and a storage capacity calculation unit that divides the cumulative current amount by the SOC difference to calculate a storage capacity of the secondary battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification