To provide a temperature estimation device, with which, while estimating the temperature of a storage battery with high accuracy, it is possible to estimate the temperature of the storage battery in the period required for said estimation.SOLUTION: Provided is a temperature estimation device 30 used for a power supply system 100 equipped with a storage battery 14, for carrying out an impedance calculation process of applying an AC voltage of a plurality of frequencies to the storage battery and calculating the impedance ZA of the storage battery at each frequency, as well as estimating the temperature of the storage battery on the basis of the calculated impedance. The temperature estimation device 30 comprises: a period determination unit for determining to be an impedance calculation period in which the impedance calculation process is carried out; and an alternate estimation unit which, when in the impedance calculation period, estimates the temperature of the storage battery by an alternate estimation process in which the temperature of the storage battery estimated on the basis of impedance before the current point of time and/or a detection value by sensors 18, 20 that detect the temperature of the storage battery or the correlation value thereof are used.SELECTED DRAWING: Figure 1

    【課題】蓄電池の温度を高精度に推定しつつ、その推定に要する期間に蓄電池の温度を推定することができる温度推定装置を提供すること。【解決手段】蓄電池14を備える電源システム100に適用され、複数の周波数の交流電圧を蓄電池に印加しそれら各周波数で蓄電池のインピーダンスZAを算出するインピーダンス算出処理を実施するとともに、算出したインピーダンスに基づいて蓄電池の温度を推定する温度推定装置30であって、インピーダンス算出処理が実施されるインピーダンス算出期間であることを判定する期間判定部と、インピーダンス算出期間である場合に、現時点以前にインピーダンスに基づいて推定された蓄電池の温度と、蓄電池の温度又はその相関値を検出するセンサ18,20による検出値との少なくとも一方を用いた代替推定処理により、蓄電池の温度を推定する代替推定部と、を備える。【選択図】 図1


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    Titel :

    TEMPERATURE ESTIMATION DEVICE


    Weitere Titelangaben:

    温度推定装置


    Beteiligte:

    Erscheinungsdatum :

    2021-08-10


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    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



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