CHARGE RATE ESTIMATION METHOD AND CHARGE RATE ESTIMATION DEVICE OF SECONDARY BATTERY

• Main Authors: MATSUSHIMA HIROHIDE, SAKAMOTO TAKUYA, HIROGAMI TATSUYA
• Format: Patent
• Language: English; Japanese
• Published: 12.05.2016
• 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 accurately estimate the charge rate of a secondary battery.SOLUTION: Associated information showing the relationship between the open-circuit voltage and charge rate of the secondary battery 1 after discharge and after charge is prepared individually, the open-circuit voltage of the secondary battery 1 is acquired, a battery state showing whether the battery state before acquisition is after charge or after discharge is acquired, and the charge rate of the secondary battery is estimated using the associated information corresponding to the acquired battery state on the basis of the acquired battery state and open-circuit voltage.SELECTED DRAWING: Figure 4 【課題】二次電池の充電率を精度良く推定することを目的とする。【解決手段】放電後と充電後とで、二次電池１の開放電圧と充電率との関係を示す関連情報をそれぞれ個別に準備し、二次電池１の開放電圧を取得するとともに、取得前の電池状態として充電後であるか放電後であるかを示す電池状態を取得し、取得した電池状態と、開放電圧とに基づいて、取得した電池状態に対応する関連情報を用いて二次電池の充電率を推定する。【選択図】図４