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Method and device for diagnosing binding fault of relay

A fault diagnosis, relay technology, applied in circuit breaker testing and other directions, can solve the main and negative relay bonding failure, safety hazards, inability to disconnect and other problems, to achieve the effect of avoiding safety hazards

Inactive Publication Date: 2014-09-03
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the main and negative relays are used for a long time, after several times of cutting off under high current conditions, the main and negative relays may have a bonding failure and cannot be disconnected, resulting in potential safety hazards

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  • Method and device for diagnosing binding fault of relay
  • Method and device for diagnosing binding fault of relay
  • Method and device for diagnosing binding fault of relay

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Embodiment Construction

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described The embodiments are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0034] In order to make the above objects, features and advantages of the present application more obvious and comprehensible, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] see figure 2 , is a flow chart of a relay bonding fau...

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Abstract

The invention provides a method and a device for diagnosing a binding fault of a relay. The method is characterized by being applied to a high-voltage loop, wherein a power battery, a main positive relay, a high-voltage load and a main negative relay are sequentially connected in series in the high-voltage loop, and a pre-charging relay and the main positive relay are connected in parallel. The method comprises the following steps: acquiring an upper high-voltage electric signal; outputting control signals to control a first relay to be actuated and control a second relay to be disconnected, wherein the main positive relay is disconnected; acquiring voltage values of two ends of the high-voltage load in the high-voltage loop; and when the voltage values of two ends of the high-voltage load meet a fault condition, determining the binding fault of the second relay, wherein the first relay is the pre-charging relay, the second relay is the main negative relay, or the first relay is the main negative relay, and the second relay is the pre-charging relay. According to the method, the diagnosis on the binding fault of the pre-charging relay or the main negative relay is realized, and safety loopholes are avoided.

Description

technical field [0001] The present application relates to the technical field of device fault diagnosis, in particular to a relay bonding fault diagnosis method and device. Background technique [0002] In the high-voltage circuit of new energy vehicles, such as figure 1 The simple schematic diagram of the high-voltage circuit shown, the positive pole of the power battery is electrically connected to one end of the parallel pre-charge relay and the main positive relay, and the other end of the pre-charge relay and the main positive relay is electrically connected to one end of the high-voltage load, such as a motor, etc. , and then the other end of the high-voltage load is electrically connected to one end of the main negative relay, and the other end of the main negative relay is electrically connected to the negative pole of the power battery. [0003] When the vehicle controller detects the signal of high-voltage power supply, it first controls the pre-charging relay and...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 任奕
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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