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Insulation monitoring system for electric vehicle

An insulation monitoring, electric vehicle technology, applied in high resistance measurement, measurement device, measurement of electrical variables, etc., can solve the problems of low accuracy, narrow application range, lack of adjustable ability, etc., to protect the control system, ensure The effect of human and vehicle safety

Inactive Publication Date: 2018-05-01
CHONGQING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, many electric vehicle insulation monitoring technologies have defects and problems such as cumbersome monitoring procedures, low accuracy, lack of adjustable ability, narrow application range, and insufficient protection for circuit controllers.

Method used

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  • Insulation monitoring system for electric vehicle

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Embodiment Construction

[0018] specific implementation plan

[0019] The technical solution in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] see figure 1 , an insulation monitoring system for electric vehicles, which includes a high-voltage monitoring circuit 8, a controller 7, a detection device 6 and a battery pack module 2, the signal input end of the high-voltage monitoring circuit is connected to the output end of the controller, and it is characterized in that : It includes a sampling resistor 5, an insulation resistor 1, a transformer 4, a capacitor 3, a vehicle ground plane and a controller 7 to form a loop.

[0021] The monitoring device 6 is connected to the controller 7 and one end of the sampling resistor 5 respectively, and the other end of the sampling resistor is connected to the controller 7 .

[0022] The two ends of the battery pack module are respectively con...

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Abstract

The invention discloses an insulation monitoring system for an electric vehicle, which comprises a high voltage monitoring circuit, a controller, an insulation detection device and a battery pack module, wherein the high voltage monitoring circuit comprises the controller, a sampling resistor, a capacitor, a transformer and an insulation resistor located between a high voltage battery and a body ground; and the controller comprises a digital / analog converter, a signal processing module and a logic judgment processing module. In the case of use, the controller continuously generates PWM wave signals, the detection device monitors the amplitude changes of sampling point signals caused by insulation resistance changes in real time, the monitoring result is processed by a comparator, the signal processing module and the logic judgment processing module, and insulation is judged. The monitoring program is simple, the adjustable ability is strong, the safety is high, the adaptability is strong, and the control circuit can be well protected.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to an electric vehicle insulation monitoring method. technical background [0002] With the development of automobile technology, the replacement of traditional internal combustion vehicles by electric vehicles has become the future development trend of automobiles, which is the consensus of people today. [0003] The total voltage of electric vehicle battery packs is generally higher than 100V, and some may even be as high as 800V. When the insulation between the electric vehicle's internal electrical system and the vehicle body is damaged, it will directly threaten the safety of the passengers and the electric vehicle itself. [0004] At present, many electric vehicle insulation monitoring technologies have defects and problems such as cumbersome monitoring procedures, low accuracy, lack of adjustability, narrow application range, and insufficient protection for circuit controller...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02
CPCG01R27/025
Inventor 朴昌浩杜国栋张艳
Owner CHONGQING UNIV OF POSTS & TELECOMM
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