To provide an electric vehicle and a battery charging method for the electric vehicle to improve charging efficiency of a second battery of which voltage is lower in an electric vehicle having a first battery and the second battery each having different voltages.SOLUTION: An electric vehicle 1 includes an on-vehicle charger 40 and a step-down unit 45. The on-vehicle charger 40 converts power of an external power source 90 from AC to DC and transforms to a first voltage and charges a first battery 10 with the DC power of the first voltage. The step-down unit 45 steps down the voltage of the DC power before the transformation of the on-vehicle charger 40 to a second voltage lower than the first voltage and outputs the DC power of the second voltage to a second battery 20.SELECTED DRAWING: Figure 1

    【課題】電圧が異なる第1バッテリと第2バッテリとを搭載した電動車両における、電圧が低い方の第2バッテリの充電効率を改善する。【解決手段】電動車両1は、車載充電器40と降圧部45とを備える。車載充電器40は、外部電源90の電力を交流から直流に変換して第1電圧に変圧し、第1電圧の直流電力により第1バッテリ10を充電する。降圧部45は、車載充電器40の変圧前の直流電力の電圧を、第1電圧よりも低い第2電圧に降圧させて、第2電圧の直流電力を第2バッテリ20に出力する。【選択図】図1


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    Title :

    ELECTRIC VEHICLE AND BATTERY CHARGING METHOD FOR ELECTRIC VEHICLE


    Additional title:

    電動車両及び電動車両のバッテリ充電方法


    Contributors:
    KISHI TAKATSUGU (author) / SAITO KOSUKE (author) / KONDO TAKANOBU (author) / LIN HE (author)

    Publication date :

    2024-08-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / 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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