PROBLEM TO BE SOLVED: To provide a backup power supply device capable of retaining the initial settings of on-vehicle electronics even when the on-vehicle electronics are powered on or off by the main power supply device.SOLUTION: The backup power supply device comprises: a first rectification part for regulating the electric current for the regular power supply (+B) of on-vehicle electronics in a direction from a main power supply device to the on-vehicle electronics; a voltage booster for exerting control to boost the power supply voltage of the main power supply device to a predetermined voltage with interposition of a charging system connected from the main power supply device to a secondary battery; a second rectification part for regulating the electric current in a direction of charging the secondary battery by the boost voltage; and a third rectification part for regulating the electric current in a direction to the regular power supply in a spare power supply system which supplies electric power from the secondary battery to the regular power supply. When the main power supply device is turned on, the backup power supply device supplies power to the on-vehicle electronics through the first rectification part and charges the secondary battery. When the power supply is shut down, upon shutdown of power supply from the main power supply device, the backup power supply device performs the voltage boosting control such that electric power is supplied from the secondary battery to the regular power supply through the third rectification part.SELECTED DRAWING: Figure 1
【課題】車載電子機器の主電源装置による電源の投入・遮断の操作をしても、車載電子機器の初期設定状態を維持することが可能なバックアップ用電源装置を提供する。【解決手段】車載電子機器の常時(+B)電源に主電源装置から車載電子機器方向に電流を規制する第1整流部と、前記主電源装置から、二次電池に接続された充電系に介在させ、主電源装置の電源電圧を所定の電圧に昇圧制御する昇圧部と、前記昇圧電圧で二次電池を充電する方向に電流を規制する第2整流部と、前記二次電池から常時電源に電力を供給する予備電力供給系上で、常時電源方向に電流を規制する第3整流部とを有し、主電源装置の電源投入状態の場合は、第1整流部による車載電子機器への電力供給と二次電池の充電を行い、電源遮断状態の場合は、主電源装置からの電力供給遮断と同時に、第3整流部によって、二次電池から常時電源に電力供給されるように、前記昇圧制御を行う。【選択図】図1
BACKUP POWER SUPPLY DEVICE
バックアップ用電源装置
2017-04-06
Patent
Elektronische Ressource
Japanisch
IPC: | B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR |
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