Relay diagnostic device and relay diagnostic method

JP7844487B2Active Publication Date: 2026-04-13LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Filing Date
2022-09-19
Publication Date
2026-04-13

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Abstract

A relay diagnostic device according to one embodiment of the present invention is a device for diagnosing a main relay that controls a connection between a battery pack and a load, and includes a resistive divider circuit including a plurality of resistors, connected between a first main relay connected to a positive terminal of the battery pack and the load, and between one end and the other end of a second main relay connected to the negative terminal of the battery pack, and a diagnostic module connected to the resistive divider circuit and a voltage source, and outputting a relay diagnostic voltage used for diagnosing the first main relay and the second main relay.
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Citation Information

Patent Citations

  • New energy automobile battery pack relay adhesion detection circuit and system

    CN209342877U

  • Relay state diagnosis circuit

    CN214310793U

  • Battery system

    JP2018143042A

  • Power supply control device, welding detection method and relay welding detection device

    JP2018196285A

  • Switch diagnostic apparatus and method using voltage distribution

    JP2019518212A