Battery management system and driving method thereof
First Claim
1. A battery management system of a secondary battery having a plurality of unit batteries, the battery management system comprising:
- a sensing unit adapted to measure an overall voltage of the secondary battery;
a controller adapted to maintain the secondary battery in an open circuit state for a first period of time when a power supply switch is turned on, and to couple the secondary battery to an external device upon the first period of time ending;
an Open Circuit Voltage (OCV) calculator adapted to receive the measured overall voltage from the sensing unit and to calculate an OCV of the secondary battery during the first period of time; and
a State of Charge (SOC) determining unit adapted to receive the calculated OCV from the OCV calculator and to determine an SOC corresponding to the OCV.
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Accused Products
Abstract
A battery management system includes a sensing unit, a controller, an Open Circuit Voltage (OCV) calculator, and a State of Charge (SOC) determination unit. The sensing unit measures a total voltage of the secondary battery. The controller maintains the secondary battery in an open circuit state for a first period of time after a power supply switch is turned on, and couples the secondary battery to an external device when the first period of time ends. The OCV calculator receives the measured voltage from the sensing unit and calculates an OCV of the secondary battery during the first period of time. The SOC determination unit receives the calculated OCV from the OCV calculator and determines an SOC corresponding to the OCV.
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Citations
10 Claims
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1. A battery management system of a secondary battery having a plurality of unit batteries, the battery management system comprising:
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a sensing unit adapted to measure an overall voltage of the secondary battery;
a controller adapted to maintain the secondary battery in an open circuit state for a first period of time when a power supply switch is turned on, and to couple the secondary battery to an external device upon the first period of time ending;
an Open Circuit Voltage (OCV) calculator adapted to receive the measured overall voltage from the sensing unit and to calculate an OCV of the secondary battery during the first period of time; and
a State of Charge (SOC) determining unit adapted to receive the calculated OCV from the OCV calculator and to determine an SOC corresponding to the OCV. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of driving a battery management system to determine a State of Charge (SOC) of a secondary battery having a plurality of unit batteries, the method comprising:
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a) maintaining the secondary battery in an open circuit state for a first period of time after a power supply switch is turned on;
b) measuring an Open Circuit Voltage (OCV) for the first period of time; and
c) determining the SOC corresponding to the OCV. - View Dependent Claims (8, 9, 10)
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Specification