METHOD OF ESTIMATING STATE OF SECONDARY BATTERY

• Main Author: HAGA NOBUYASU
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

PROBLEM TO BE SOLVED: To provide a technique which makes it possible to accurately estimate the full charge capacity of a secondary battery for a running electric vehicle.SOLUTION: According to a difference ( T) between an estimation value Ts of an internal temperature of a secondary battery calculated in a process to estimate an SOC (state of charge) of the secondary battery using a battery reaction model and a measured value T of an external temperature, a full charge capacity of the battery reaction model is corrected.SELECTED DRAWING: Figure 4 【課題】走行中の電動車両において二次電池の満充電容量を正確に推定することを可能とする技術を提供する。【解決手段】電池反応モデルを用いて二次電池のＳＯＣを推定する過程において算出される二次電池の内部温度の推定値Ｔｓと外部温度の実測値Ｔとの差（ΔＴ）に応じて当該電池反応モデルの満充電容量を補正する。【選択図】図４