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公开(公告)号：US20230415608A1
公开(公告)日：2023-12-28
申请号：US18038377
申请日：2021-09-27
Applicant: Hitachi Astemo, Ltd.
Inventor： Yasushi SUGIYAMA
CPC classification number: B60L58/18 , B60W20/50 , B60L2210/10 , B60W2510/242
Abstract: A vehicle control system is capable of implementing a fail operation while ensuring safety of traveling of a vehicle even when a power source function failure of a battery occurs. The vehicle control system includes an HV battery, first, second, third and fourth high-voltage relays that are redundantly arranged on an upstream side and a downstream side of the HV battery, a first and second DC-DC converters that are connected to the relays, a first and second high-voltage SW control units that are disposed on a downstream side of the converters and control the relays, and an in-vehicle battery disposed on a downstream side of the second DC-DC converter. The first high-voltage SW control unit and the second high-voltage SW control unit interrupt the relays and control a vehicle based on electric power of the in-vehicle battery on condition that an abnormality of the HV battery is detected.
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公开(公告)号：US20220189217A1
公开(公告)日：2022-06-16
申请号：US17438221
申请日：2020-02-05
Applicant: Hitachi Astemo, Ltd.
Inventor： Masahiro DOI , Yasushi SUGIYAMA , Yuri OHARA , Takeo YAMASHITA
Abstract: Provided is an electronic control device including a timer that operates during a key-off time period, the electronic control device having high reliability to diagnose whether the timer is normally operated even during the key-off time period. The electronic control device includes a first power supply unit to which a battery voltage is always supplied as a power supply voltage, the first power supply unit including a first timer that measures a key-off time period, a diagnostic timer different from the first timer, and a first timer diagnosis unit that compares a timer value of the first timer with that of the diagnostic timer during the key-off time period.
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