Insulation monitoring device of power system and insulation monitoring method
A technology of insulation monitoring device and power system, which is applied in the direction of measuring device, measuring circuit, testing circuit, etc., can solve the problem of high accuracy in building circuits, achieve the effects of reducing monitoring costs, improving accuracy, and high sampling accuracy
Inactive Publication Date: 2017-01-04
BEIJING ELECTRIC VEHICLE
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This method requires high precision in building circuits, which is difficult to achieve in real life
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[0024] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments. In the following description, specific details, such as specific configurations and components, are provided only to assist in a comprehensive understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art should recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
[0025] refer to figure 1 The embodiment of the present invention provides an insulation monitoring device for a power system, comprising: a first monitoring circuit connected to the positive pole of the power battery, and the other end of the fi...
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The invention provides an insulation monitoring device of a power system and an insulation monitoring method. The device comprises a first monitoring circuit connected with a power cell positive electrode, a positive electrode ground insulation resistor, a second monitoring circuit connected with a power cell negative electrode, and a negative electrode ground insulation resistor, wherein the other end of the first monitoring circuit is in ground connection, one end of the positive electrode ground insulation resistor is connected with the power cell positive electrode and the first monitoring circuit, the other end of the positive electrode ground insulation resistor is in ground connection, the other end of the second monitoring circuit is in ground connection, one end of the negative electrode ground insulation resistor is connected with the power cell negative electrode and the second monitoring circuit, the other end of the negative electrode ground insulation resistor is in ground connection, and the first monitoring circuit is connected with the second monitoring circuit. The insulation monitoring device of the power system is advantaged in that high sampling precision is realized, sampling accuracy is improved, and insulation monitoring cost is reduced.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to an insulation monitoring device and method for a power system. Background technique [0002] With the extensive application of high-voltage DC systems in industries, civil, energy and other fields, its safety has also begun to receive attention, because high-voltage DC systems are not equipped with fast leakage protection devices like AC systems. Especially for electric vehicle power batteries and charging piles, there are various possibilities such as impact, rain causing water or moisture in the equipment, cable damage, etc., which can easily lead to insulation degradation. When these DC systems leak electricity, it is easy to cause casualties, so the power system insulation monitoring device is particularly important. [0003] Existing insulation monitoring methods mainly include: [0004] 1. The signal injection method is to inject a high-frequency AC signal into the el...
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IPC IPC(8): G01R31/12G01R31/14
CPCG01R31/1227G01R31/14
Inventor 梁瑞贺中玮代康伟张骞慧闫立国胡凡曹东林
Owner BEIJING ELECTRIC VEHICLE