Device and method for detecting state of main circuit relay in DC power supply system

A technology of DC power supply system and state detection device, which is applied in the field of main circuit relay state detection device, which can solve the problems of poor work reliability, personal or equipment danger, and inability to judge whether the relay is stuck, etc., and achieves the effect of simple circuit structure and guaranteed safety
CN102866353BInactive Publication Date: 2015-11-18CHANGSHA UNIVERSITY
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
CHANGSHA UNIVERSITY
Publication Date
2015-11-18
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a device and a method for state detection of a main loop relay of a direct-current power supply system. The device comprises current-limiting resistors, disconnecting switches and current detecting circuits, the current-limiting resistors, the disconnecting switches and the current detecting circuits are sequentially connected in series to form detecting branch circuits, and the detecting branch circuits are connected to two ends of a main contact of the main loop relay in a cross manner. The method is used for detecting the state of the main loop relay by the aid of the device for state detection of the main loop relay of the direct-current power supply system. The device is simple in circuit structure, can perform online real-time detection of the state of the main loop relay of the direct-current power supply system, can reliably detect the state of the main loop relay and precisely judges whether the relay is in the normal state or fault state, and thereby power output of a power supply device is well controlled, and personal and equipment safety is guaranteed beneficially.
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Description

technical field

[0001] The invention relates to a main circuit relay state detection device and method, in particular to a main circuit relay state detection device and method of a DC power supply system. Background technique

[0002] With the increasing tension of fossil energy, the application requirements of energy saving and environmental protection are getting more and more attention. Therefore, various efforts to develop pure electric vehicles or hybrid vehicles in recent years are aimed at reducing energy consumption and pollution to the living environment.

[0003] At present, the power supply system used in hybrid electric vehicles and pure electric vehicles is usually composed of multiple battery packs in series, and the DC bus voltage is as high as hundreds of volts, which is far beyond the safe voltage that the human body can bear. Once the high-voltage system fails , it is very dangerous for operation or maintenance personnel. The output and shutdown of the hi...

Claims

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