SECONDARY BATTERY SYSTEM
First Claim
1. A secondary battery system, comprising:
- a battery controller which controls charge and discharge of a secondary battery;
a total controller which controls the entire system;
an ammeter which detects a charge current and a discharge current of the secondary battery;
a voltmeter which detects a voltage of the secondary battery, anddetermination means for obtaining a direct current resistance of the secondary battery at the time of charge and a direct current resistance of the secondary battery at the time of discharge on the basis of a current value and a voltage value detected by the ammeter and the voltmeter, to thereby determine a temporary increase in the direct current resistance of the secondary battery caused by charge and discharge with a large current on the basis of a relation between the two obtained direct current resistances.
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Accused Products
Abstract
Provided is a secondary battery system including: a battery controller which controls charge and discharge of a secondary battery; a total controller which controls the entire system; an ammeter which detects a charge current and a discharge current of the secondary battery; and a voltmeter which detects a voltage of the secondary battery, in which a direct current resistance of the secondary battery at the time of charge and a direct current resistance of the secondary battery at the time of discharge are obtained on the basis of a current value and a voltage value detected by the ammeter and the voltmeter, to thereby determine a temporary increase in the direct current resistance of the secondary battery caused by charge and discharge with a large current on the basis of a relation between the two obtained direct current resistances. Accordingly, in a secondary battery system used in a hybrid system, a wind power generating system, a photovoltaic power generating system, and the like, the situation where a direct current resistance thereof transitionally (temporarily) increases is simply detected on the basis of the usage situation of a secondary battery, to thereby accurately calculate the deterioration state of the secondary battery and thus enable an appropriate coping process, so that the life of the secondary battery can be extended.
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Citations
11 Claims
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1. A secondary battery system, comprising:
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a battery controller which controls charge and discharge of a secondary battery; a total controller which controls the entire system; an ammeter which detects a charge current and a discharge current of the secondary battery; a voltmeter which detects a voltage of the secondary battery, and determination means for obtaining a direct current resistance of the secondary battery at the time of charge and a direct current resistance of the secondary battery at the time of discharge on the basis of a current value and a voltage value detected by the ammeter and the voltmeter, to thereby determine a temporary increase in the direct current resistance of the secondary battery caused by charge and discharge with a large current on the basis of a relation between the two obtained direct current resistances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification