To provide a technique capable of suppressing an overcurrent state of an auxiliary battery even in a high-temperature area.SOLUTION: A voltage converter is connected to between auxiliary batteries supplying a power to a main battery and an auxiliary machine, drops a voltage of the main battery, and supplies the voltage to the auxiliary battery. In the case where a temperature of a coolant for cooling the voltage converter is a predetermined temperature threshold value or larger, the voltage converter sets (i) an upper limit value of an output voltage to an output limit voltage that is smaller than a rating output current without changing the upper limit value of an output current from the rating output current when a request current value from the auxiliary machine is equal to or greater than a predetermined current threshold value; and (ii) sets the upper limit value of the output current to an output limit current that is smaller than the rating output current without changing the upper limit value of the output voltage from the rating output voltage when the request current value is less than the current threshold value.SELECTED DRAWING: Figure 2

    【課題】高温地域においても、補機バッテリが過放電状態になることを抑制できる技術を提供する。【解決手段】メインバッテリと補機に電力を供給する補機バッテリとの間に接続され、メインバッテリの電圧を降圧して補機バッテリに供給する電圧コンバータは、電圧コンバータを冷却する冷媒の温度が予め定められた温度閾値以上である場合において、(i)補機からの要求電流値が予め定められた電流閾値以上である場合に、出力電流の上限値を定格出力電流から変更することなく、出力電圧の上限値を定格出力電圧よりも小さい出力制限電圧に設定し、(ii)要求電流値が電流閾値未満である場合に、出力電圧の上限値を定格出力電圧から変更することなく、出力電流の上限値を定格出力電流よりも小さい出力制限電流に設定する。【選択図】図2


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    Title :

    VOLTAGE CONVERTER


    Additional title:

    電圧コンバータ


    Contributors:

    Publication date :

    2024-06-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / 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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