Power battery insulation detection system and detection method

A power battery and detection system technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as high volume and cost, decreased insulation performance, leakage current, etc., and achieve simple system, low cost, and security for people and vehicles safe effect

Inactive Publication Date: 2012-06-13
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
View PDF6 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the whole vehicle, factors such as humidity in the air, aging of the insulating medium, bad changes in the battery cells inside the power battery pack and external loads will all lead to a decline in the insulation performance between the high-voltage battery system and the whole vehicle
The decline in insulation performance will cause the positive or negative pole of the power battery system to leak current to the whole vehicle, which will lead to a decrease in the performance of the power battery system, and in serious cases will endanger the safety of people in the vehicle
In the existing technology, most of the insulation detection devices of power batteries periodically monitor the insulation performance of power batteries, and do not have the characteristics of dynamic real-time detection; higher cost

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power battery insulation detection system and detection method
  • Power battery insulation detection system and detection method
  • Power battery insulation detection system and detection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing.

[0020] In the following figures, the voltage at point a is Va, and the voltage at point b is Vb. D1 and D2 are unidirectional conduction diodes, which are respectively connected with resistors R5 and R7 to form a fault judgment system. D3 is a Zener diode. VCC is the working power supply of the circuit. Rv is the insulation fault equivalent resistance (its resistance value is determined by the real-time insulation state). The comparison output compares Va and Vb, and finally generates a real-time insulation state signal.

[0021] figure 1 It is a block diagram of the overall structure of the power battery insulation detection system. The detection system includes a voltage divider circuit, a fault judgment circuit, a voltage stabilization circuit, an insulation fault equivalent resistance, a comparison output module, a voltage detection module, a table lookup calcul...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a power battery insulation detection system and a real-time display method. The power battery insulation detection system comprises a power battery system, a voltage dividing system, a fault judging system, a voltage stabilizing system, an insulation fault equivalent resistor, a comparison output system, a voltage detection system, a table look-up part and a real-time display part. The detection method is that insulation fault state between the power battery system and a low voltage system is detected in dynamic and real-time mode by detecting changes of nodal voltage inside the judging system, and further the comparison output system outputs insulation state alarm signals of the power battery system so that a power assembly control system can make corresponding treatment timely and safety of humans and vehicles is ensured. Furthermore, current insulation resistance can be calculated in table look-up mode by detecting key node pressure of an insulation detection circuit and also can be displayed in real time.

Description

technical field [0001] The invention belongs to the technical field of safety control of a high-voltage battery system, and in particular relates to an insulation detection system and a real-time display method of a power battery. Background technique [0002] With the increasing global awareness of energy saving and environmental protection, the development trend of pure electric vehicles in the field of new energy is growing. As a key component of a pure electric vehicle, the power battery pack must be one of the primary considerations for the power battery system in terms of its high-voltage safety. Therefore, in the research of pure electric vehicles, the higher working voltage system of the power battery pack Higher requirements are put forward for the insulation performance between the vehicle and the vehicle. [0003] In the whole vehicle, factors such as humidity in the air, aging of the insulating medium, bad changes in the battery cells inside the power battery pa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R27/02
Inventor 肖利华童斌朴昌浩张友群李宗华苏岭周安健任勇
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap