Device and method for detecting high-voltage interlocking failure of electric vehicle

A high-voltage interlocking and fault detection technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as failure to determine the failure of high-voltage connectors, achieve accurate diagnosis, save time, and reduce workload.

Inactive Publication Date: 2015-04-29
BRILLIANCE AUTO
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention proposes a high-voltage interlock fault detection device and detection method for electric vehicles, which solves the problem that when multiple high-voltage connectors fail, it is impossible to determine which high-voltage connector is faulty. The method can simplify the troubleshooting process, and Accurately locate the location of the interlock fault, which is convenient to implement, saves time while reducing workload

Method used

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  • Device and method for detecting high-voltage interlocking failure of electric vehicle
  • Device and method for detecting high-voltage interlocking failure of electric vehicle

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Embodiment 1

[0023] The high-voltage interlock fault detection device for electric vehicles in this embodiment, such as figure 1 shown. It includes a high-voltage interlock plug-in 1, an interlock fault detection device 2 and an instrument display 3. The high-voltage interlock plug-in 1 is sequentially connected to the fault detection device 2 and the instrument display 3 through the data bus 6 .

[0024] The fault detection device 2 is composed of a buffer 4 and a controller 5 , and the high-voltage interlock plug-in 1 is sequentially connected with the buffer 3 and the controller 4 of the interlock fault detection device 2 . In this embodiment, the buffer 4 used in this embodiment is composed of a three-state eight-way buffer model 74LS244 and a three-state eight-way buffer model 74ALS245 connected in series. For example, when the high-voltage interlock circuit is composed of 7 high-voltage interlock plug-ins, that is figure 1 When n=7, one end of the 0th signal line is connected to t...

Embodiment 2

[0029] A kind of electric vehicle high-voltage interlock fault detection method adopted in this embodiment, such as figure 2 shown, including the following steps:

[0030] In step 201, when the whole vehicle is in the ignition (Key on) state, the voltage levels at both ends of the high voltage interlock plug-in are detected. The controller receives the level signal from both ends of the high-voltage interlock plug-in of the buffer through the bus bar, and the controller selects to receive the level signal at both ends of any high-voltage interlock plug-in according to needs.

[0031] In step 202, if the 0th signal line and the nth signal line are detected, if both are at high level, it means that the high voltage interlock circuit is normal, and step 203 is executed. In step 203, it is displayed that there is no error in the circuit, such as HVIL no errors, that is, the high voltage interlock circuit has no fault;

[0032] If the 0th signal line is at high level and the nth...

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Abstract

The invention discloses a device and a method for detecting the high-voltage interlocking failure of an electric vehicle and relates to interlocking detection of high-voltage connectors. The device comprises a high-voltage interlocking plug-in unit, an interlocking failure detection device and an instrument display, wherein the high-voltage interlocking plug-in unit is sequentially connected with the failure detection device and the instrument display through a data bus. The data bus accesses a high-voltage interlocking detection loop, and the failure elimination process is simplified. An overall vehicle is provided with multiple high-voltage interlocking parts; when the high-voltage interlocking device at a certain position fails, the failure occurrence position can be accurately diagnosed, an instrument automatically displays the specific position, and the high-voltage connectors do not need to be pulled down one by one for troubleshooting, so that great workload is reduced, and time is saved. Even if multiple interlocking failures exist, the failure positions can be accurately judged.

Description

technical field [0001] The invention relates to interlock detection of high-voltage connectors, in particular to a high-voltage interlock fault detection device and detection method for electric vehicles. Background technique [0002] In response to the call for sustainable development, the new energy vehicle industry has developed rapidly. Pure electric vehicles and hybrid vehicles represent the development direction of new energy vehicles. Compared with traditional cars, an important feature of electric vehicles is that the whole vehicle is equipped with a high-voltage system, including high-voltage components such as charging system, power distribution system, energy storage system, and power system. The voltage of the high-voltage system has far exceeded the safe voltage of the human body. In order to prevent the danger of electric shock caused by misoperation and ensure the safety of maintenance, a high-voltage interlock circuit is essential. [0003] Electric vehicle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 呼延洪张玉龙贾茹单红艳高力隋涛娄锋于希洋王成瑞
Owner BRILLIANCE AUTO
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