To provide a main relay protection device capable of reliably preventing overheating of a main relay of an electric vehicle having an external connection type charger and a charging relay.SOLUTION: An electric vehicle includes an external connection type charger 26 and charging relays 41 and 43 for connecting and disconnecting it to the driving battery 20. When the main relay temperature becomes equal to or higher than the heat release threshold T, the charging relays 41 and 43 are turned on together with main relays 37 and 39. Thereby, the heat of the main relays 37, 39 is transmitted from battery side portions 40a, 42a of charging bus bars 40, 42 to charger side portions 40b, 42b of the charging bus bars 40, 42 via the charging relays 41, 43. Heat is rapidly radiated mainly from the charger side portions 40b, 42b of the charging bus bars 40, 42. Further, at least one of the heat release amount and the heat capacity of the charger side portions 40b, 42b of the charging bus bars 40, 42 connected to the main relays 37, 39 is made equal.SELECTED DRAWING: Figure 6

    【課題】外部接続型充電器及び充電リレーを備えた電動車両のメインリレーの過熱を確実に防止することが可能なメインリレー保護装置を提供する。【解決手段】外部接続型充電器26と、それを駆動用バッテリ20に断続する充電リレー41、43を備えた電動車両において、メインリレー温度が放熱開始閾値TS以上になるとメインリレー37、39と共に充電リレー41、43をオン制御する。これにより、メインリレー37、39の熱は、充電バスバー40,42のバッテリ側部40a、42aから、充電リレー41、43を経て、充電バスバー40、42の充電器側部40b、42bへと伝わり、主に、この充電バスバー40、42の充電器側部40b、42bから速やかに放熱される。また、メインリレー37、39に接続される充電バスバー40、42の充電器側部40b、42bの放熱量及び熱容量の少なくとも一方を同等とした。【選択図】図6


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    Titel :

    MAIN RELAY PROTECTION DEVICE


    Weitere Titelangaben:

    メインリレー保護装置


    Beteiligte:
    ASAI YUTO (Autor:in) / MASUDA AKIRA (Autor:in) / NISHIKORI TAKANOBU (Autor:in) / TAKEI KOHEI (Autor:in)

    Erscheinungsdatum :

    2020-04-02


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen



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