Detecting circuit for insulating resistance to ground of power cells

A technology of insulation resistance to ground and power battery packs, which is applied in the direction of impedance measurement, measurement of electricity, measurement devices, etc.

Active Publication Date: 2011-07-20
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Detecting circuit for insulating resistance to ground of power cells
  • Detecting circuit for insulating resistance to ground of power cells
  • Detecting circuit for insulating resistance to ground of power cells

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Embodiment Construction

[0012] With reference to the accompanying drawings, the specific content and embodiments of the present invention will be further described.

[0013] The detection circuit of the ground insulation resistance of the power battery pack proposed by the present invention is as follows: figure 1 As shown, it is composed of voltage sensors N1, N2, N3, optocoupler MOS tube N4, single-chip microcomputer N5, and resistors R11, R12, R21, R22, R31, R32, and R41; among them, the positive bus point A of the power battery pack to be tested passes through Resistor R11 is connected to terminal 1 of voltage sensor N1, terminal 2 of voltage sensor N1 is connected to point B of the negative busbar of the power battery pack to be tested, terminal 3 of voltage sensor N1 is connected to power supply-VCC, terminal 5 is connected to power supply VCC, and terminal 4 is connected to the resistor R12 is connected to the ground of the microcontroller; point A of the positive busbar of the power battery p...

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Abstract

The invention relates to a detecting circuit for insulating resistance to ground of power cells, belonging to the field of power cells application. The circuit comprises a voltage sensor, a light-coupled MOS tube, a single chip, a resistor and a power supply, wherein a resistor R11 is connected to a 1st end of a voltage sensor N1; a 3rd end of the N1 is connected to the power supply -VCC; a 5th end of the N1 is connected to the power supply VCC; a 4th end of the N1 is connected to the single chip by a resistor R12; a resistor R21 is connected to a 1st end of a voltage sensor N2; a 2nd end of the N2 is connected to a 8th end of the light-coupled MOS tube N4; a 3rd end of the N2 is connected to the power supply -VCC; a 5th end of the N2 is connected to the power supply VCC; a 4th end of theN2 is connected to the single chip by grounding; both the 6th and 7th ends of the N4 are connected to point G by grounding; a 5th end of the N4 is connected to a 1st end of N3 by a resistor R31; a 2nd end of the N3 is connected to a B point on negative bar of the power cells to be detected; a 3rd end of the N3 is connected to the power supply -VCC; a 5th end of the N3 is connected to the power supply VCC; a 4th end of the N3 is connected to the circuit by a resistor R32; both the 1st and 3rd ends of the N4 are connected to the power supply VCC by a resistor R41; the 2nd and 4th ends of the N4are respectively connected to the digital outlets P0.1 and P0.2. The circuit of the invention has the advantages of simple structure, high detecting precision, etc.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and in particular relates to a power battery pack-to-ground insulation resistance detection circuit. Background technique [0002] Today, when global oil resources are becoming increasingly tense and human beings are increasingly aware of environmental protection, power battery packs have been widely used in technical fields such as electric vehicles and wind power generation. In the field of electric vehicles, the working voltage of the power battery is generally above DC 300V, and a higher voltage specification is adopted to reduce the working current of the electrical equipment and the weight of the electrical equipment and the vehicle; in the field of wind power generation, the power battery pack The working voltage reaches about 1200V. The higher working voltage puts forward higher requirements on the insulation performance between the power battery pack and the environment ground...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/18G01R31/36
Inventor 黄勇柯轶炜陈全世仇斌陈伏虎
Owner STATE GRID CORP OF CHINA
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