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Device for condition monitoring and fault diagnosis of high-voltage switch

A fault diagnosis device and high-voltage switch technology, applied in the field of electronics, can solve the problems that high-voltage direct current systems cannot achieve high reliability and high safety level, personal safety hazards, low reliability and safety level, etc., so as to improve safety and Reliability, solve detection problems, ensure the effect of temperature stability

Inactive Publication Date: 2012-12-19
CONTEMPORARY AMPEREX TECH CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the existing state monitoring and fault diagnosis system of high-voltage switch mainly realizes state monitoring through the mechanical auxiliary contact (linkage device) attached to the high-voltage switch. meet the requirements of high reliability and high safety level, and bring great hidden dangers to personal safety

Method used

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  • Device for condition monitoring and fault diagnosis of high-voltage switch
  • Device for condition monitoring and fault diagnosis of high-voltage switch
  • Device for condition monitoring and fault diagnosis of high-voltage switch

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Embodiment Construction

[0032] In order to make the objectives, technical solutions and beneficial technical effects of the present invention clearer, the present invention will be further clearly and completely described below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0033] The invention provides a state monitoring and fault diagnosis device for a high-voltage switch, which is used for state monitoring and fault diagnosis of a high-voltage switch in a high-voltage direct current output circuit, so as to improve the safety and reliability of the high-voltage direct current system. Among them, the high-voltage DC system can be a high-voltage battery pack of a new energy vehicle or an energy storage system. The high-voltage switch is set on the high-voltage DC output circuit to complet...

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Abstract

The invention discloses a device for condition monitoring and fault diagnosis of a high-voltage switch. The device comprises a monitoring unit and a control unit, wherein the monitoring unit takes a cathode capable of outputting high-voltage direct current as a floating sampling datum point, and takes an input port and an output port of each high-voltage switch in a high-voltage direct current output loop as sampling points, and a voltage value of each sampling point is detected through a multi-channel high-voltage detection circuit; the control unit is used for sending a switch command to the high-voltage switch, and carrying out condition monitoring and fault diagnosis on the high-voltage switch according to the switch command and the voltage value of each sampling point. According to the device for condition monitoring and fault diagnosis of a high-voltage switch provided by the invention, condition monitoring and fault diagnosis of a high-voltage direct current system are realized, and safety and reliability of the high-voltage direct current system are improved.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a state monitoring and fault diagnosis device for a high-voltage switch. Background technique [0002] In the output circuit of high-voltage battery packs of new energy vehicles and energy storage systems, there are generally multiple high-voltage switches (such as relays, contactors, etc.) distributed. These high-voltage switches are used to complete normal high-voltage output on-off control and pre-charge control. , fast / slow charging control, emergency cut-off of high-voltage output under abnormal conditions, etc. Since high voltage output involves personal safety issues, it is particularly important to carry out state monitoring and fault diagnosis on high voltage switches. The system must ensure that the high-voltage switch is closed or disconnected according to the normal switching instructions. When the high-voltage switch has a sticking fault or a fault that cannot b...

Claims

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Application Information

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IPC IPC(8): G01R31/327G01R19/00G01R15/04
Inventor 成勇
Owner CONTEMPORARY AMPEREX TECH CO
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