Improved electric automobile power cell insulation detection system and method

A technology for electric vehicles and detection systems, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of endangering the personal safety of drivers and passengers, reducing the insulation safety of the whole vehicle, and breaking the skin, so as to improve safety. Effect

Inactive Publication Date: 2017-10-20
SHANGHAI DIANJI UNIV
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  • Abstract
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Problems solved by technology

During the daily use of pure electric vehicles, harsh environments such as humidity, vibration, and exposure to the sun can easily cause aging and cracking of the high-voltage wiring harness of the battery, th...

Method used

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  • Improved electric automobile power cell insulation detection system and method
  • Improved electric automobile power cell insulation detection system and method
  • Improved electric automobile power cell insulation detection system and method

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Embodiment Construction

[0024] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0025] Such as figure 1 As shown, it is a system block diagram of an improved electric vehicle power battery insulation detection system provided by the present invention, wherein:

[0026] The main control unit adopts STM32 high-performance single-chip microcomputer with ARM core launched by ST Company, which has embedded 16-channel 12-bit high-speed ADC, which can simplify the hardware of the system. The main function of th...

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Abstract

The invention relates to an improved electric automobile power cell insulation detection system and method. The system is characterized by comprising a normally-opened relay K0 and a bias resistor R connected in series between a positive bus of a cell and a chassis, a normally-opened relay K1 and a bias resistor R are connected in series between a negative bus of the cell and the chassis, one ADC sampling channel of an STM32 high performance single-chip microcomputer is used for acquiring a voltage value U0 between the positive bus of the cell and the chassis through a voltage reduction unit, and another ADC sampling channel of the STM32 high performance single-chip microcomputer is used for acquiring a voltage value U1 between the negative bus of the cell and the chassis through a polarity conversion unit and the voltage reduction unit. The invention further provides an insulation detection method based on the improved electric automobile power cell insulation detection system. The system is advantaged in that when insulation performance of an electric automobile decreases, timely alarm can be realized, and thereby safety of the electric automobile is improved.

Description

technical field [0001] The invention relates to a power battery insulation detection system and a detection method using the system, in particular to a novel bridge-based electric vehicle insulation detection system and detection method. Background technique [0002] In order to solve global problems such as environmental pollution and oil crisis, pure electric vehicles have been developed rapidly. Pure electric vehicles generally use batteries as power batteries, and the voltage of the battery pack is usually above 200V, which is far beyond the safe range that the human body can bear. During the daily use of pure electric vehicles, harsh environments such as humidity, vibration, and sun exposure can easily cause aging and cracking of the high-voltage wiring harness of the battery, thereby reducing the insulation safety of the vehicle. When the positive and negative bus bars of the battery and the car body leak electricity, it will directly endanger the personal safety of t...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1227
Inventor 黄文曾宪文高桂革唐滢松盛仕杰褚鑫吴凯
Owner SHANGHAI DIANJI UNIV
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