PROBLEM TO BE SOLVED: To provide a deterioration state estimating device for a secondary battery capable of quickly and accurately estimating a deterioration state of a secondary battery, and a battery system including the same, and an electric vehicle.SOLUTION: The secondary battery deterioration state estimation device for estimating a deterioration state of a secondary battery is configured to acquire a first current value when having shifted to constant-voltage charge from constant current constant-voltage charge or constant power constant-voltage charge and a second current value after a predetermined time has elapsed after shifting to the constant-voltage charge. The secondary battery deterioration state estimation device is also configured to calculate (second current value-first current value)/predetermined time which represents an inclination of change from the first current value to the second current value and to estimate the deterioration state of the secondary battery from the inclination value.SELECTED DRAWING: Figure 2
【課題】 二次電池の劣化状態を迅速且つ正確に推定する二次電池の劣化状態推定装置並びにそれを備えた電池システム及び電動車両を提供する。【解決手段】 二次電池の劣化状態を推定する二次電池の劣化状態推定装置であって、定電流定電圧充電又は定電力定電圧充電における定電圧充電に移行した際の第1電流値と、前記定電圧充電に移行した後所定時間経過後の第2電流値とを取得し、前記第1電流値から前記第2電流値への変化の傾きである(第2電流値−第1電流値)/所定時間を求め、この傾きの値より前記二次電池の劣化状態を推定する。【選択図】図2
DEVICE FOR ESTIMATING DEGRADATION STATE OF SECONDARY BATTERY, BATTERY SYSTEM HAVING THE SAME, AND ELECTRIC VEHICLE
二次電池の劣化状態推定装置並びにそれを備えた電池システム及び電動車両
2018-10-04
Patent
Electronic Resource
Japanese
IPC: | B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung |
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