Method and apparatus for estimating battery state
AssigneeSamsung Electronics Co., Ltd.
InventorsTae Won Song, Ju Wan Lim, Sungick Kim, Jinho Kim
Life of this patent
Estimating the term…
Abstract
Provided is a method and apparatus for estimating a battery state. A method of estimating a battery state that includes determining whether a previous state to a rest state of a battery is a charging state or a discharging state; selecting a current profile comprising one or both of a charging pulse and a discharging pulse based on the previous state of the battery; stabilizing an open circuit voltage (OCV) of the battery by applying the current profile to the battery; and measuring the stabilized OCV.
Claims20
A processor implemented method for an estimation of a battery state, the method comprising:
- determining respective operation states of a battery for plural times, the respective operation states being determined from among at least one of a rest state, a charging state, or a discharging state;
- and
- performing a determination of a current state of the battery, including:
- determining whether a previous operation state of the battery, previous to a determined current operation state of the battery being the rest state, is the charging state or the discharging state;
- selecting, based on which of the charging state and the discharging state the previous operation state is determined to have been, a current profile in a form that alternately includes at least one charging pulse and at least one discharging pulse;
- performing a stabilizing of an open circuit voltage (OCV) of the battery by controlling current of the battery according to the selected current profile;
- and
- estimating a battery state of the battery based on a measuring of a subsequent OCV of the battery resulting from the performing of the stabilizing.
An apparatus, the apparatus comprising:
- a processor configured to:
- determine respective operation states of a battery for plural times, the respective operation states being determined from among at least one of a rest state, a charging state, or a discharging state;
- and
- perform a determination of a current state of the battery,
- wherein, to perform the determination of the current state of the battery, the processor is further configured to:
- determine whether a previous operation state of the battery, previous to a determined current operation state of the battery being the rest state, is the charging state or the discharging state;
- select, based on which of the charging state and the discharging state the previous operation state is determined to have been, a current profile in a form that alternately includes at least one charging pulse and at least one discharging pulse;
- perform a stabilization of an open circuit voltage (OCV) of the battery by controlling current of the battery according the selected current profile;
- measure a subsequent OCV of the battery resulting from the performed stabilization;
- and
- estimate a state of charge (SOC) of the battery based on the measured subsequent OCV.
Dependencies are inferred from the claim text.