Relay diagnosis device, relay diagnosis method, battery system, and electric vehicle

A technology of diagnostic devices and relays, which can be used in electrical devices, electric vehicles, battery/fuel cell control devices, etc., to solve problems such as failure to accurately identify faults

Pending Publication Date: 2022-04-15
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, it is possible to identify that at least one of the multiple relays has failed based on the voltage at the load-side contacts, but it is not possible to identify exactly which relay has failed

Method used

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  • Relay diagnosis device, relay diagnosis method, battery system, and electric vehicle
  • Relay diagnosis device, relay diagnosis method, battery system, and electric vehicle
  • Relay diagnosis device, relay diagnosis method, battery system, and electric vehicle

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Embodiment Construction

[0032] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms or expressions used in the specification and the appended claims should not be construed as being limited to the ordinary and dictionary meanings, but on the basis of the principle of allowing the inventor to properly define the terms for the best interpretation, It should be interpreted based on meanings and concepts corresponding to the technical aspects of the present disclosure.

[0033] Therefore, the embodiments described herein and the illustrations shown in the drawings are only one of the most preferred embodiments of the present invention, and are not intended to fully describe the technical aspects of the present disclosure, so it should be understood that the It undergoes various other equivalents and modifications.

[0034] Terms including ordinal numbers such as...

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Abstract

The relay diagnosis device according to the present invention comprises: a diagnosis unit for a parallel battery pack assembly comprising a first battery pack having a first battery module and a first positive relay and a second battery pack having a second battery module and a second positive relay, the diagnosis switch and the diagnosis resistor are connected between the first battery pack terminal and the second battery pack terminal; a first detector for detecting a current of the first battery module; a second detector for detecting a current of the second battery module; and a control unit that collects a first detection value from the first detector and a second detection value from the second detector in a first diagnosis period in which the first positive relay and the second positive relay are in the open operating state and the switch is diagnosed to be in the closed operating state. The control unit determines a normally-closed failure of the first positive relay and a normally-closed failure of the second positive relay based on the first detection value, the second detection value, and a first threshold value.

Description

technical field [0001] The present disclosure relates to a fault diagnosis technique for a relay assembly provided in each of a plurality of battery packs connected in parallel. [0002] This application claims priority to Korean Patent Application No. 10-2020-0069206 filed with the Korean Intellectual Property Office on Jun. 8, 2020, the disclosure of which is hereby incorporated by reference in its entirety. Background technique [0003] Recently, the demand for portable electronic products such as laptop computers, video cameras, and mobile phones has increased dramatically, and with the widespread development of electric vehicles, energy storage batteries, robots, and satellites, high-performance batteries that can be repeatedly charged and discharged are being developed. Do a lot of research. [0004] Currently commercially available batteries include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, lithium batteries, etc. Among these batteri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327B60L58/18B60L3/00
CPCG01R31/327B60L58/18B60L3/0046B60L3/04B60L58/21B60L2240/549B60L2240/529G01R31/3278B60L3/0061B60L58/19G01R1/203G01R1/206B60L2240/547B60Y2306/15B60Y2200/91Y02T10/70G01R31/3842
Inventor 朴种壹
Owner LG ENERGY SOLUTION LTD
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