Title:
継電器制御装置、および継電器制御装置の制御方法
Document Type and Number:
Japanese Patent JP7397984
Kind Code:
B2
Abstract:
In a case where a load current flows in an energized state where a power supply is connected to a load, it is assumed that a measured voltage fluctuates due to a voltage drop caused by contact resistance of a relay contact, and thus the relay state cannot be accurately diagnosed. A relay control device that controls a relay connected between a secondary battery and a load device calculates, in a failure diagnosis during energization with the relay being closed, a contact resistance value of the relay based on a voltage applied to the relay and a current flowing through the secondary battery, and determines a first threshold set as a variable value in accordance with a temperature change amount of the relay and compares the calculated contact resistance value with the first threshold to diagnose a failure of the relay.
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Inventors:
Hikaru Miura
Tatsumi Yamauchi
Mutsumi Kikuchi
Tatsumi Yamauchi
Mutsumi Kikuchi
Application Number:
JP2022530020A
Publication Date:
December 13, 2023
Filing Date:
February 05, 2021
Export Citation:
Assignee:
Hitachi Astemo, Ltd.
International Classes:
H01H47/00
Domestic Patent References:
| JP2019174165A | ||||
| JP3087672A |
Foreign References:
| CN110794253A |
Attorney, Agent or Firm:
Patent Attorney Corporation Sunnext International Patent Office