The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 03, 2025
Filed:
Aug. 14, 2020
Hitachi Astemo, Ltd., Hitachinaka, JP;
Takumi Masubuchi, Hitachinaka, JP;
Masahiro Doi, Hitachinaka, JP;
Hitachi Astemo, Ltd., Hitachinaka, JP;
Abstract
Even when a power supply relay cannot be turned off and when power supply to a microcomputer is normally cut off, fixing of the power supply relay is detected. An electronic control deviceaccording to an aspect of the present invention includes a relay drive circuitthat controls on and off of a power supply relayaccording to information about the on and off of power supply, an electronic circuit (first power supply system block, microcomputer) that operates at a first power supply voltage (V) supplied from a batterythrough the power supply relay, and a monitoring unit (second power supply system block) that monitors the first power supply voltage when the power supply is turned off, and holds a monitoring result, the first power supply voltage reflecting presence or absence of fixing of the power supply relay.