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New energy automobile failure self-detection method

A new energy vehicle, fault self-checking technology, applied in electric vehicles, vehicle components, electrical devices, etc., can solve problems such as high cost, hidden safety hazards, and cumbersome layout, and achieve the effect of reducing the workload of personnel

Active Publication Date: 2017-01-04
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a serious insulation fault occurs in the system, the common measure in the prior art is to immediately cut off the main circuit relay of the battery. The loss of power steering is a great safety hazard to the safety of the vehicle
[0003] The latest insulation tester can lock the fault source through an external branch sensor, but due to factors such as cumbersome layout, high cost, and low reliability, no manufacturers currently use this solution

Method used

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  • New energy automobile failure self-detection method

Examples

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Embodiment Construction

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] like figure 1 Shown is a high-voltage electrical schematic diagram of a new energy vehicle (taking a pure electric vehicle as an example) consistent with the embodiment of the present invention.

[0031] In the figure, A+ is the main positive circuit relay of the battery, A- is the main negative circuit relay of the battery, B1 is the auxiliary machine-electric power steering system (EPS) relay, B2 is the auxiliary machine-e...

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Abstract

The invention provides a new energy automobile failure self-detection method. The method includes steps: step 101, sequentially disconnecting a corresponding relay when an automobile failure occurs; step 103, judging a failure point according to a feedback signal of the relay. According to the new energy automobile failure self-detection method, if a sudden insulation failure occurs in a running process, failure elimination can be performed sequentially according to safety levels without causing immediate operation stopping of an EPS (electric power steering system), and accordingly sudden loss of steering assistance in the running process of an automobile is avoided. The new energy automobile failure self-detection method well accords with safety of the automobile and operability of a driver when the failure occurs.

Description

technical field [0001] The invention relates to the field of new energy, in particular to a method for fault self-checking of a new energy vehicle. Background technique [0002] For new energy vehicles (taking pure electric vehicles as an example), each high-voltage component obtains electric energy through the main circuit of the battery, including the drive motor, electric power steering system (EPS), electric air compression system (EAS), DC transformer (DCDC) wait. When a serious insulation fault occurs in the system, the common measure in the prior art is to immediately cut off the main circuit relay of the battery. The loss of power steering has a great potential safety hazard for the safety of the vehicle. [0003] The latest insulation tester can lock the fault source through an external branch sensor, but due to factors such as cumbersome layout, high cost, and low reliability, no manufacturers currently use this solution. Contents of the invention [0004] The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/04B60L3/00
CPCB60L3/0023B60L3/04
Inventor 吕凤龙台述鹏尹良
Owner WEICHAI POWER CO LTD
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