BATTERY MANAGEMENT SYSTEM AND DRIVING METHOD THEREOF
First Claim
1. A battery management system comprising a plurality of battery cells, the system comprising:
- a voltage and current sensor for the battery that generates voltage and current signals concerning the battery; and
a main controller that receives the voltage and current signals from the sensor and is configured to;
(a) measure a key-on open circuit voltage (OCV) using the battery voltage signal, (b) determine whether the key-on OCV belongs to a first OCV region, and (c) estimate an initial state of charge (SOC) of the battery using a linear equation when the key-on OCV belongs to the first OCV region.
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Abstract
A battery management system for managing a battery including a plurality of battery cells and a driving method are provided. The system includes a sensor, and a main control unit (MCU). The sensor senses a voltage and a current of the battery. The MCU receives the voltage and the current of the battery, measures an open circuit voltage (OCV) in key-on using the battery voltage, and estimates an initial SOC depending on the OCV in the key-on. The MCU divides the OCV into first and second OCV regions, and, when the OCV in the key-on is in the first OCV region, estimates the initial SOC using a linear equation.
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Citations
16 Claims
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1. A battery management system comprising a plurality of battery cells, the system comprising:
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a voltage and current sensor for the battery that generates voltage and current signals concerning the battery; and a main controller that receives the voltage and current signals from the sensor and is configured to;
(a) measure a key-on open circuit voltage (OCV) using the battery voltage signal, (b) determine whether the key-on OCV belongs to a first OCV region, and (c) estimate an initial state of charge (SOC) of the battery using a linear equation when the key-on OCV belongs to the first OCV region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of estimating an initial state of charge (SOC) of a battery, comprising:
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(a) sensing voltage and current from the battery to obtain voltage and current signals; (b) measuring a key-on open circuit voltage (OCV) using the voltage signal; (c) determining whether the key-on OCV belongs to a first OCV region; and (d) estimating the initial SOC using a linear equation when the key-on OCV belongs to the first OCV region. - View Dependent Claims (13, 14, 15, 16)
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Specification