Insulation detection circuit and method for electric automobile

A technology for electric vehicles and detection circuits, which is applied in the direction of testing circuits, testing dielectric strength, etc., can solve the problems of normal signal influence, cumbersome software processing, low reliability, etc., to reduce complexity, improve reliability and convenience, The effect of strong adaptability

Active Publication Date: 2016-12-14
深圳市沛城电子科技有限公司
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Problems solved by technology

For the signal injection method, since the signal needs to be injected, it is cumbersome in terms of software processing, and it may affect the normal signal at the same time, and the reliability is low
For the resistance method, the commonly used method is: t

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  • Insulation detection circuit and method for electric automobile
  • Insulation detection circuit and method for electric automobile
  • Insulation detection circuit and method for electric automobile

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[0041] It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0042] The technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0043] It should be noted that the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Therefore, ...

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Abstract

The invention discloses an insulation detection circuit for an electric automobile. The insulation detection circuit comprises a battery and a detection module, a switch module, a multi-way selection switch module, an analog-digital conversion module and a main control module which are sequentially connected with the battery, and the main control module is connected with the switch module and the multi-way selection switch module separately. When the main control module controls the switch module to be in a first working state, first total voltage and first automobile body voltage are obtained by detecting the battery in the first working state, and when the main control module controls the switch module to be in a second working state, second total voltage and second automobile body voltage are obtained by detecting the battery in the second working state; the detection module transmits the first total voltage, the first automobile body voltage, the second total voltage and the second automobile body voltage to the analog-digital conversion module for analog-digital conversion, the data subjected to analog-digital conversion is transmitted to the main control module, and therefore the main control module can determine the insulation intensity of the electric automobile. The invention further discloses an insulation detection method of the electric automobile. According to the insulation detection circuit and method for the electric automobile, the complexity of a hardware circuit is reduced, and the reliability and convenience of insulation detection on the electric automobile are improved.

Description

technical field [0001] The invention relates to the technical field of automobile detection, in particular to an electric automobile insulation detection circuit and method. Background technique [0002] At present, the insulation detection of electric vehicles can be roughly divided into resistance method and signal injection method. For the signal injection method, because the signal needs to be injected, it is relatively cumbersome in terms of software processing, and it may affect the normal signal at the same time, and the reliability is low. For the resistance method, the commonly used method is: the whole system chooses the car body as the ground, so the hardware needs to be equipped with positive and negative power supplies, and at the same time, the signal needs to be reverse-processed. The hardware will be more complicated and not convenient enough. Contents of the invention [0003] The main purpose of the present invention is to provide an electric vehicle ins...

Claims

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Application Information

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IPC IPC(8): G01R31/14
CPCG01R31/14
Inventor 宁荣彬袁江
Owner 深圳市沛城电子科技有限公司
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