To accurately estimate a deterioration state of a secondary battery.SOLUTION: A ΔSOC calculation unit 103 calculates an SOC fluctuation width ΔSOC using a rainflow counting method, and a ΔSOC frequency distribution calculation unit 104 calculates an SOC fluctuation width ΔSOC occurrence frequency distribution (frequency distribution) based on the SOC fluctuation width ΔSOC. A battery deterioration estimation unit 106 calculates a battery deterioration estimation amount based on a total discharge electricity amount Ah and the frequency distribution of the SOC fluctuation width ΔSOC.SELECTED DRAWING: Figure 5

    【課題】二次電池の劣化状態を精度よく推定することを、を目的とする。【解決手段】ΔSOC算出部103は、レインフロー法を用いてSOC変動幅ΔSOCを算出し、ΔSOC頻度分布算出部104は、SOC変動幅ΔSOCに基づいてSOC変動幅ΔSOCの頻度分布(度数分布)を算出する。電池劣化推定部106は、総放電電気量Ahと、SOC変動幅ΔSOCの頻度分布に基づき、電池劣化推定量を算出する。【選択図】図5


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    Title :

    SECONDARY BATTERY DETERIORATION STATE ESTIMATION DEVICE


    Additional title:

    二次電池の劣化状態推定装置


    Contributors:

    Publication date :

    2022-02-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / 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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