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Insulation detection circuit and vehicle

A detection circuit and subtraction circuit technology, applied in the direction of test circuit, measurement of electricity, measurement of electrical variables, etc., can solve the problems of increased production, testing, and maintenance costs

Active Publication Date: 2020-07-07
ZHEJIANG GEELY HLDG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increased production, testing, and maintenance costs

Method used

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  • Insulation detection circuit and vehicle
  • Insulation detection circuit and vehicle
  • Insulation detection circuit and vehicle

Examples

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Embodiment Construction

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner" and "outer" are based on those shown in the accompanying drawings. Orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specifi...

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Abstract

The invention discloses an insulation detection circuit and a vehicle. The circuit comprises a first analog resistor, a second analog resistor, a first resistor, a second resistor, a third resistor, afourth resistor, a fifth resistor, a first switch, a second switch, a fourth switch, a first capacitor, a second capacitor, a subtraction circuit, an AD detection circuit and a detection device. Thefirst analog resistor is connected with the first capacitor, the first resistor and the vehicle-mounted battery pack, the first analog resistor is connected with the second analog resistor, and the first analog resistor is further grounded; the second analog resistor is respectively connected with the vehicle-mounted battery pack, the second resistor and the second capacitor; the first resistor isconnected with the first switch; the first switch is connected with the second switch and the subtraction circuit; the subtraction circuit is connected with the detection device through a fifth resistor, and the subtraction circuit is also connected with a third resistor and a fourth resistor; the third resistor is grounded; the fourth resistor is connected with a reference voltage input end; thesubtraction circuit is connected with the AD detection circuit. Interference can be filtered out, and the system safety is improved.

Description

technical field [0001] The invention relates to the technical field of power supply insulation detection, in particular to an insulation detection circuit and a vehicle. Background technique [0002] With the popularity of new energy vehicles, the safety of new energy vehicles has attracted more and more attention. New energy vehicle battery packs are high-voltage components, and the voltage of plug-in new energy vehicle battery packs is mostly above 300 volts, far exceeding the safe voltage of the human body. Therefore, the high-voltage part of the battery pack needs to be insulated from the low-voltage part of the body and ensure sufficient electrical clearance. Although the insulation protection has been done in the design, to ensure that the vehicle is in a safe state throughout its life and prevent the risk of electric shock, the whole vehicle needs a high-voltage battery management system with insulation detection function to know and quantify the insulation status of...

Claims

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Application Information

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IPC IPC(8): G01R31/14G01R27/02G01R31/00
CPCG01R31/14G01R27/025G01R31/006
Inventor 陶孟锋陈德厅刘刚邬学建潘福中许云波唐功楼佳丽赵磊张永杰郑嘉伟梁正勇王圆圆蒋凌燕浦武林
Owner ZHEJIANG GEELY HLDG GRP CO LTD
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