PROBLEM TO BE SOLVED: To make it possible to contribute for elongation of a time of drive by a backup power source of an on-vehicle device comprising the backup power source.SOLUTION: An on-vehicle device M1 comprises: a converter for transforming an external power source B; a first load circuit 2a and a second load circuit 2b to which electric power source is supplied from the converter; and a backup power source 3 which supplies an electric power source to the converter in the place of the external power source B when the external power source B is blocked. In the on-vehicle device, detection means 4 which detects changeover of a power source supply source of the converter, and blocking means 5 which blocks power source supply to the second load circuit 2b when changeover from the external power source B to the backup power source 3 is detected by the detection means 4 are provided. Because of such a configuration, electrical connection of the second load circuit 2b is blocked when changing to the backup power source 3, whereby electric charges reserved by the backup power source 3 are not consumed by the second load circuit 2b.SELECTED DRAWING: Figure 1
【課題】バックアップ電源を備えた車載装置のバックアップ電源による駆動時間の長時間化に寄与する。【解決手段】車載装置M1は、外部電源Bを変圧するコンバータと、コンバータから電源を供給される第1負荷回路2aおよび第2負荷回路2bと、外部電源Bが遮断されたときに外部電源Bに代わってコンバータに電源を供給するバックアップ電源3と、を備えた車載装置であって、コンバータの電源供給元の切り替わりを検出する検出手段4と、検出手段4によって外部電源Bからバックアップ電源3への切り替わりが検出されると、第2負荷回路2bへの電源供給を遮断する遮断手段5と、を設けた。このように構成することで、バックアップ電源3に切り替わるときに第2負荷回路2bの電気的接続が遮断されるので、バックアップ電源3が蓄えた電荷が第2負荷回路2bによって消費されない。【選択図】図1
ON-VEHICLE DEVICE
車載装置
2017-08-17
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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