Fault detection instrument of electromobile and fault detecting method

Abstract

The invention discloses a fault detection instrument of an electromobile and a fault detecting method. The instrument comprises an aerial socket,a gear selecting switch,a detection convertor,a speed controller and an instrument shell body of a voltage displayer electrically connected with the detection convertor. The gear selecting switch comprises a forward gear,a back gear and a stop gear whichcorrespond to forward,back and stop gears of the electromobile. The speed controller corresponds to an electronic throttle of the electromobile and comprises a potentiometer and a rotary knob linked switch. A first gear detecting circuit,a second gear detecting circuit,a third gear detecting circuit,a fourth detecting circuit,a fifth detecting circuit and a sixth detecting circuit which respectively detect battery set voltage,electronic throttle power supply voltage,electronic throttle speed changing voltage,stop gear voltage,forward gear voltage and back gear voltage are correspondingly connected with the detection convertor and the aerial socket. The detecting method that the instrument is in communication with the interface of a controller is adopted,based on the detecting circuits,theinstrument detects whether or not faults exist in the controller,and the detection is quick,comprehensive and high in universality.

Description

technical field [0001] The invention relates to the field of electric vehicle fault detection, in particular to an electric vehicle fault detection instrument and a fault detection method for detecting electric vehicle faults. Background technique [0002] In the face of increasingly severe energy and environmental problems, energy-saving and new energy vehicles are becoming the hotspots of current research. As a type of energy-saving and new energy vehicles, pure electric vehicles have many advantages such as no exhaust emissions, high energy efficiency, low noise, and recyclable energy during driving. Therefore, vigorously developing pure electric vehicles is beneficial to energy security and environmental protection has great significance. [0003] Despite the rapid development of electric vehicles, the market share has greatly increased, but the failure rate of electric vehicles has also increased, and some low-speed electric vehicles do not have 4S shops dedicated to f...

AI Technical Summary

Problems solved by technology

[0003] Despite the rapid development of electric vehicles, the market share has greatly increased, but the failure rate of electric vehicles has also increased, and some low-speed electric vehicles do not have 4S shops dedicated to fault detection and maintenance. At present, there is still a shortage of professional maintenance technicians in the maintenance department However, ordinary maintenance personnel have limited ability to control the fault detection and maintenance of emerging electric vehicles; the electric vehicle cover wiring is many and tends to be complicated, and it is time-consuming and laborious to use ordinary multimeters for detection. The limitations of the above conditions undoubtedly increase the electric vehicle fault detection and maintenance difficulty

[0004] At present, there are many automatic fault detectors for electric vehicle controllers on the market. Although the detection accuracy is high, the structure is complex, the cost is high, the detection process is cumbersome, and more importantly, it has poor versatility and cannot be fully adapted to various brands. Various models of electric vehicle controllers, so it is not suitable for maintenance personnel in the maintenance department who need to repair various vehicle models

[0005] China patent authorization announcement number: CN202120119U, the date of authorization announcement is January 18, 2012, which discloses an automatic fault detector for electric vehicle controller, including microprocessor, power supply module, power output module, CAN module, serial port module, I / O input module, I / O output module, PWM wave output module, AD output module, AD input module, capture input module, display module and key module, and the microprocessor is respectively circuit-connected to the power module, power output module, CAN module, serial port module, I / O input module, I / O output module, PWM wave output module, AD output module, AD input module, capture input module, display module and button module, although the detection time can be shortened, the structural composition Complicated, not very versatile, not suitable for promotion and use in the maintenance department

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