To provide a vehicle power supply system that can output a signal, indicating that a backup low-voltage power supply is ready to supply electric power for operating an emergency-time important load, in a short time after transition from an OFF state to an ON state of the vehicle power supply system when the vehicle is in a state satisfying predetermined conditions.SOLUTION: A vehicle power supply system 1 comprises a main power supply system 10 having a main low-voltage power supply 11 and a backup power supply system 20 having a backup low-voltage power supply 23. A backup power supply control device 25 of the backup power supply system 20 outputs a signal indicating that the backup low-voltage power supply 23 is ready to supply electric power for operating an emergency-time important load 22 without performing backup low-voltage power supply state estimation processing when the vehicle V is in a state satisfying predetermined conditions, and executes the backup low-voltage power supply state estimation processing when the vehicle V is in a state not satisfying the predetermined conditions.SELECTED DRAWING: Figure 3
【課題】車両の状態が所定条件を満たす場合には、バックアップ低圧電源が緊急時重要負荷を動作させる電力を供給可能な状態であることを示す信号を、車両電源システムがオフ状態からオン状態に遷移してから短時間で出力できる車両電源システムを提供する。【解決手段】車両電源システム1は、メイン低圧電源11を有する主電源系統10と、バックアップ低圧電源23を有するバックアップ電源系統20と、を備える。バックアップ電源系統20のバックアップ電源制御装置25は、車両Vの状態が所定条件を満たす場合には、バックアップ低圧電源状態推定処理を実行せずに、バックアップ低圧電源23が緊急時重要負荷22を動作させる電力を供給可能な状態であることを示す信号を出力し、車両Vの状態が所定条件を満たさない場合に、バックアップ低圧電源状態推定処理を実行する。【選択図】図3
VEHICLE POWER SUPPLY SYSTEM
車両電源システム
2023-01-24
Patent
Elektronische Ressource
Japanisch
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / 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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