To provide a battery deterioration prediction system which can predict the degree of deterioration of a secondary battery with high accuracy.SOLUTION: A polarization calculation unit 108 of a battery deterioration prediction system 1 calculates negative electrode polarization and positive electrode polarization from each of negative electrode resistance and positive electrode resistance and the current value of the secondary battery. A CCP calculation unit 109 of the battery deterioration prediction system 1 calculates a closed circuit potential of the negative electrode, based on an open-circuit potential of the negative electrode of the secondary battery and the negative electrode polarization calculated by the polarization calculation unit, so as to calculate the closed circuit potential of the positive electrode based on the open-circuit potential of the positive electrode of the secondary battery and the positive electrode polarization calculated by the polarization calculation unit. Based on one at least one of the closed circuit potential of the negative electrode and the closed circuit potential of the positive electrode which are calculated by the CCP calculation unit, a capacity prediction unit 110 of the battery deterioration prediction system 1 predicts the negative electrode capacity, the positive electrode capacity and an SOC difference capacity between the positive and negative electrodes of the secondary battery, and predicts a battery capacity based on the negative electrode capacity, the positive electrode capacity and the SOC difference capacity between the positive and negative electrodes.SELECTED DRAWING: Figure 2

    【課題】二次電池の劣化度合いを高精度に予測することができる電池劣化予測システムを提供する。【解決手段】電池劣化予測システム1の分極算出部108は、負極抵抗及び正極抵抗のそれぞれと二次電池の電流値とから負極分極及び正極分極を算出する。電池劣化予測システム1のCCP算出部109は、二次電池の負極の開回路電位と分極算出部において算出される負極分極とに基づいて前記負極の閉回路電位を算出し、二次電池の正極の開回路電位と分極算出部において算出される正極分極とに基づいて前記正極の閉回路電位を算出する。電池劣化予測システム1の容量予測部110は、CCP算出部において算出される前記負極の閉回路電位及び前記正極の閉回路電位の少なくとも一方に基づいて、二次電池の負極容量、正極容量、及び正負極SOCずれ容量を予測し、負極容量、正極容量、及び正負極SOCずれ容量に基づいて電池容量を予測する。【選択図】図2


    Access

    Download


    Export, share and cite



    Title :

    BATTERY DETERIORATION PREDICTION SYSTEM


    Additional title:

    電池劣化予測システム


    Contributors:

    Publication date :

    2022-01-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung