Method for charging battery
First Claim
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1. A method for charging a lead battery, wherein:
- a SOC is controlled so as to be less than 100%; and
when the lead battery has not been charged and discharged for a predetermined time, refresh charge is performed so that the SOC becomes at least 90% or more.
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Abstract
A method for charging a lead battery is provided. In the method, a SOC is controlled so as to be less than 100%, and when the lead battery has not been charged and discharged for a predetermined time, refresh charge is performed so that the SOC becomes at least 90% or more.
37 Citations
15 Claims
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1. A method for charging a lead battery, wherein:
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a SOC is controlled so as to be less than 100%; and
when the lead battery has not been charged and discharged for a predetermined time, refresh charge is performed so that the SOC becomes at least 90% or more. - View Dependent Claims (5, 7, 8)
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2. A method for charging a lead battery, wherein:
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a SOC is controlled so as to be less than 100%; and
every time the lead battery is charged and discharged in predetermined time intervals, refresh charge is performed so that the SOC becomes at least 90% or more. - View Dependent Claims (6)
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3. A method for charging a lead battery, wherein:
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a SOC is controlled so as to be less than 100%; and
when the SOC is lowered below a predetermined value, refresh charge is performed so that the SOC becomes at least 90% or more.
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4. A method for charging a lead battery, wherein:
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a SOC is controlled so as to be less than 100%; and
when a temperature of the lead battery is less than or equal to a predetermined value, refresh charge is performed so that the SOC becomes at least 90% or more.
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9. A method for determining the life of a battery, wherein
the battery is subjected to refresh charge, a SOC of the battery after the refresh charge is presumed to be 100%, charge and discharge are performed, and a SOC(1) of the battery after the charge and discharge, the SOC(1) being obtained based on a quantity of charged, and a SOC(2) obtained based on a discharging voltage in discharge are compared with each other, and the life of the battery is determined based on a difference between the SOC(1) and the SOC(2).
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10. A method for determining the life of a battery, wherein a first DC-IR value is obtained with respect to a SOC of the battery in an initial state where the battery is not degraded, based on charging and discharging currents and a battery voltage, and
the first DC-IR value is compared with a second DC-IR value of the battery in the initial state obtained in advance, and the life of the battery is determined based on a difference between the first and second DC-IR values.
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11. A method for detecting a SOC of a lead battery, wherein
an OCV of the lead battery or a discharging voltage of the lead battery when a discharging current is less than or equal to a predetermined value is measured, and the SOC of the lead battery is detected based on a relationship between a predetermined OCV and the SOC or a relationship between the discharging voltage and the SOC, and when the SOC is calculated, a variation in the OCV or a variation in the discharging voltage and a variation in the SOC are measured with respect to a predetermined time, and the relationship between the predetermined OCV and the SOC or the relationship between the discharging voltage and the SOC is corrected.
Specification