CN103376359B - A kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile - Google Patents
A kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile Download PDFInfo
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- CN103376359B CN103376359B CN201210124773.1A CN201210124773A CN103376359B CN 103376359 B CN103376359 B CN 103376359B CN 201210124773 A CN201210124773 A CN 201210124773A CN 103376359 B CN103376359 B CN 103376359B
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- 238000009413 insulation Methods 0.000 title claims abstract description 31
- 238000012544 monitoring process Methods 0.000 title claims abstract description 14
- 230000004888 barrier function Effects 0.000 claims abstract description 12
- 238000010276 construction Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Abstract
The present invention relates to a kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile, include device body, be characterized in: in device body, be provided with driving source assembly, the output terminal of this driving source assembly is connected with the A point cohesive end of Wheatstone bridge assembly.Meanwhile, the B point cohesive end of Wheatstone bridge assembly is connected with the input end of differential amplify, and the D point cohesive end of Wheatstone bridge assembly passes through the input end of voltage barrier assembly, and the output terminal stating voltage barrier assembly is battery detecting end.Further, the C point cohesive end of Wheatstone bridge assembly is provided with publicly.Thus, insulation impedance value is high, highly sensitive close to actual value, precision.Meanwhile, insulation impedance scope is monitored large.Further, unitary construction of the present invention is simple, effectively can reduce hardware cost, simplifies software computing.
Description
Technical field
The present invention relates to a kind of monitoring device, particularly relate to a kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile.
Background technology
With regard to the monitoring device that existing market provides, current hybrid power and pure electric vehicle power system contain a separate high pressure battery power source, and leaking electricity to prevent high-voltage power supply threatens driver and passenger safety.Therefore, electronic system must detect the insulation impedance value on high voltage power source high-voltage positive electrode output terminal vehicle body relative to high voltage negative output terminal ground whether within the scope of safety value.Prior art major part is electric signal (positive DC power bus and negative DC power bus) of periodically sampling, and calculates ground insulation index.
Summary of the invention
Object of the present invention is exactly to solve the above-mentioned problems in the prior art, provides a kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile.
Object of the present invention is achieved through the following technical solutions:
A kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile, include device body, wherein: in described device body, be provided with driving source assembly, the output terminal of described driving source assembly is connected with the A point cohesive end of Wheatstone bridge assembly, the B point cohesive end of described Wheatstone bridge assembly is connected with the input end of differential amplify, the D point cohesive end of described Wheatstone bridge assembly passes through the input end of voltage barrier assembly, the output terminal of described voltage barrier assembly is battery detecting end, and the C point cohesive end of described Wheatstone bridge assembly is provided with publicly.
Further, above-mentioned a kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile, wherein:
Further, above-mentioned a kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile, wherein: described Wheatstone bridge assembly is provided with two groups of arms, first arm is by A point cohesive end, B point cohesive end, C point cohesive end is formed, second arm is by A point cohesive end, D point cohesive end, C point cohesive end is formed, described A point cohesive end and D point cohesive end, A point cohesive end and B point cohesive end, B point cohesive end and C point cohesive end, D point cohesive end and C point cohesive end, resistance is distributed with between D point cohesive end and B point cohesive end, the resistance of described first arm and the second arm is than equal.
Further, above-mentioned a kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile, wherein: described driving source assembly includes alternating voltage source module, the output terminal of described alternating voltage source module is provided with amplifier module, and the output terminal of described amplifier module is connected into the A point cohesive end of Wheatstone bridge assembly.
Again further, above-mentioned a kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile, wherein: described voltage barrier assembly is capacitance component.
The advantage of technical solution of the present invention is mainly reflected in: insulation impedance value is high, highly sensitive close to actual value, precision.Meanwhile, insulation impedance scope is monitored large.Further, unitary construction of the present invention is simple, effectively can reduce hardware cost, simplifies software computing.
Accompanying drawing explanation
Object of the present invention, advantage and disadvantage, by for illustration and explanation for the non-limitative illustration passing through preferred embodiment below.These embodiments are only the prominent examples of application technical solution of the present invention, allly take equivalent replacement or equivalent transformation and the technical scheme that formed, all drop within the scope of protection of present invention.
Fig. 1 is the organigram of the high voltage direct current insulation monitoring and warning device being originally applicable to new-energy automobile;
Fig. 2 is the high voltage direct current insulation monitoring and warning device circuit theory schematic diagram being originally applicable to new-energy automobile.
Embodiment
A kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile as shown in Figure 1 and Figure 2, include device body 1, its unusual part is: be provided with driving source assembly 2 in device body 1 of the present invention.Specifically, the output terminal of this driving source assembly 2 is connected with the A point cohesive end of Wheatstone bridge assembly 3.Meanwhile, the B point cohesive end of Wheatstone bridge assembly 3 is connected with the input end of differential amplify module 8, and the D point cohesive end of Wheatstone bridge assembly 3 passes through the input end of voltage barrier assembly.Meanwhile, the output terminal of voltage barrier assembly is battery detecting end.Consider the needs of ground connection, the C point cohesive end of Wheatstone bridge assembly 3 is provided with publicly 4.
With regard to the present invention one preferably embodiment, the Wheatstone bridge assembly 3 that the present invention adopts is provided with two groups of arms.Specifically, the first arm is made up of A point cohesive end, B point cohesive end, C point cohesive end, and the second arm is made up of A point cohesive end, D point cohesive end, C point cohesive end.And, in order to the correct running of Wheatstone bridge assembly 3, at A point cohesive end and D point cohesive end, A point cohesive end and B point cohesive end, B point cohesive end and C point cohesive end, D point cohesive end and C point cohesive end, between D point cohesive end and B point cohesive end, be distributed with resistance, be respectively resistance 9A, 9B, 9C, 9D, 9E, 9F, 9G.Meanwhile, the first arm and the resistance of the second arm are than equal.
Further, in order to ensure the job stability of driving source assembly 2, the driving source assembly 2 of employing includes alternating voltage source module 5, and the output terminal of this alternating voltage source module 5 is provided with amplifier module 6.Meanwhile, the A point cohesive end of Wheatstone bridge assembly 3 is connected at the output terminal of amplifier module 6.Thus, be used for producing the alternating voltage waveform of one or more variation, such as sinusoidal wave, square wave, pulse and saw row ripple etc.Further, above waveform may be periodic, also may be transient state.
Again further, in order to put forward the effect of high-voltage isolating, be convenient to actual manufacture simultaneously and implement, voltage barrier assembly is capacitance component 7.Certainly, with regard to actual application, this voltage barrier assembly is not defined as electric capacity, and other similar components and parts also can play same effect.Thus, because capacitance component 7 is shown as high resistant resistance for DC current, so high-voltage DC power supply 11 can not be flow to by capacitance component 7 hold 10 virtually.In the application of reality, some elements can be increased and flow through Wheatstone bridge assembly 3 to prevent electric current from high-voltage DC power supply 11.Such as: between D point cohesive end and high-voltage DC power supply 11, by increasing some filter elements, be used for stoping high-voltage DC power supply 11 undesired signal to affect Wheatstone bridge assembly 3, simultaneously in order to monitor potential failure electric current (flowing to ground from high-voltage DC power supply 11), alternating current can flow through Wheatstone bridge assembly 3.
In conjunction with actual service condition of the present invention, when Wheatstone bridge assembly 3 balances, flow through A point cohesive end from driving source assembly 2 and form the piezoelectric position such as B point cohesive end and D point cohesive end to Wheatstone bridge assembly 3, thus do not have electric current from D point point cohesive end to resistance 9E, resistance 9F, resistance 9G to B put cohesive end.
When driving source assembly 2 is excited, can diminish because capacitance component 7 shows impedance, therefore driving source assembly 2 electric current can by the second arm to D point cohesive end to high-voltage DC power supply 11.If at this time a potential failure High-Voltage Insulation module 12 occurs, just form one from DC high-voltage DC power supply 11 to the ground loop holding 10 virtually, this grounding path and resistance 9D walk abreast.Result causes resistance value between D and C to be not equal to resistance value between B and D, therefore flows to before Wheatstone bridge assembly 3 electric current makes B point and D point from A and produces voltage difference.Insulating resistance value in inefficacy High-Voltage Insulation module 12 will be reflected in the current value between B to D, the voltage drop namely on resistance 9F.Specifically, inefficacy High-Voltage Insulation module 12, is in state of insulation when normal condition, therefore can be considered infinite resistance, (certainly can according to practical application can set be greater than certain value time-such as 1 megaohm, for state of insulation is good).Once there is disabler, when resistance now will be less than certain value, such as 10K Europe.Now judge that High-Voltage Insulation was lost efficacy.Hold 10 conductings virtually in that case.Like this, can be made up of hardware above and corresponding signal information is provided, carry out computing through processor and calculate direct supply insulation values, judge insulation situation.Meanwhile, due to the existence of capacitance component 7, Wheatstone bridge assembly 2 can be flow to by isolated DC power supply.In simple terms, the state of high-voltage DC power supply 11 leakage current can be monitored during this period by Wheatstone bridge assembly 2.Utilize driving source assembly 2 to provide driving voltage or electric current simultaneously.
When other behaviours in service of inventing, hold the high direct voltage resistance value on 10 loops can calculate according to the relation of inefficacy High-Voltage Insulation module 12 output voltage values and alternating voltage source module 5 magnitude of voltage virtually.In some cases, differential amplify module 8 output voltage values is sent to BCU process, and driving source voltage is produced by circuit activation source component 2, is the value known, so BCU can carry out calculating insulating resistance value according to these signal values.
Can be found out by above-mentioned character express, after adopting the present invention, insulation impedance value is high, highly sensitive close to actual value, precision.Meanwhile, insulation impedance scope is monitored large.Further, unitary construction of the present invention is simple, effectively can reduce hardware cost, simplifies software computing.
Claims (1)
1. one kind is applicable to the high voltage direct current insulation monitoring and warning device of new-energy automobile, include device body, it is characterized in that: in described device body, be provided with driving source assembly, the output terminal of described driving source assembly is connected with the A point cohesive end of Wheatstone bridge assembly, the B point cohesive end of described Wheatstone bridge assembly is connected with the input end of differential amplify, the D point cohesive end of described Wheatstone bridge assembly passes through the input end of voltage barrier assembly, the output terminal of described voltage barrier assembly is battery detecting end, the C point cohesive end of described Wheatstone bridge assembly is provided with publicly, described Wheatstone bridge assembly is provided with two groups of arms, first arm is made up of A point cohesive end, B point cohesive end, C point cohesive end, second arm is made up of A point cohesive end, D point cohesive end, C point cohesive end, described A point cohesive end and D point cohesive end, A point cohesive end and B point cohesive end, B point cohesive end and C point cohesive end, D point cohesive end and C point cohesive end, be distributed with resistance between D point cohesive end and B point cohesive end, the resistance of described first arm and the second arm is than equal, described driving source assembly includes alternating voltage source module, and the output terminal of described alternating voltage source module is provided with amplifier module, the output terminal of described amplifier module is connected into the A point cohesive end of Wheatstone bridge assembly, described voltage barrier assembly is capacitance component.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210124773.1A CN103376359B (en) | 2012-04-26 | 2012-04-26 | A kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile |
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| CN201210124773.1A CN103376359B (en) | 2012-04-26 | 2012-04-26 | A kind of high voltage direct current insulation monitoring and warning device being applicable to new-energy automobile |
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| CN103376359A CN103376359A (en) | 2013-10-30 |
| CN103376359B true CN103376359B (en) | 2015-10-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104076207A (en) * | 2014-06-26 | 2014-10-01 | 天津市松正电动汽车技术股份有限公司 | Electric vehicle insulation detecting circuit |
| GB2556129B (en) * | 2016-11-18 | 2019-08-28 | Mahindra Electric Mobility Ltd | Systems and methods for monitoring isolation in high voltage systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2479500A1 (en) * | 1980-03-28 | 1981-10-02 | Alkan R & Cie | PROGRAMMABLE WIRING CONTROLLER |
| DE3122549C2 (en) * | 1981-06-06 | 1985-01-10 | Bundesrepublik Deutschland, vertreten durch den Bundesminister für Wirtschaft in Bonn, dieser vertreten durch den Präsidenten der Bundesanstalt für Materialprüfung (BAM), 1000 Berlin | Simple insulation resistance measurement arrangement for strain gauge measurement technology |
| JP3004251B2 (en) * | 1998-03-02 | 2000-01-31 | 東通電子株式会社 | Resistance measurement device |
| US6683464B2 (en) * | 2002-03-01 | 2004-01-27 | Kavlico Corporation | Stabilized conductivity sensing system |
| DE10345732A1 (en) * | 2003-10-01 | 2005-04-21 | Bosch Gmbh Robert | Method and circuit arrangement for offset correction of a measuring bridge |
| JP4831670B2 (en) * | 2006-02-24 | 2011-12-07 | 富士通株式会社 | Sample resistance measuring device |
| KR100974650B1 (en) * | 2008-10-30 | 2010-08-06 | 한국표준과학연구원 | Resistance Measuring Apparatus and Method |
| FR2940458B1 (en) * | 2008-12-24 | 2011-03-04 | Commissariat Energie Atomique | DEVICE AND METHOD FOR CHARACTERIZATION OF ELECTRIC OR ELECTRONIC COMPONENTS. |
| EP2264759B1 (en) * | 2009-06-17 | 2012-07-04 | STMicroelectronics (Rousset) SAS | Element for identifying an integrated circuit chip |
| EP2333568A1 (en) * | 2009-12-10 | 2011-06-15 | Johnson Controls Saft Advanced Power Solutions LLC | Determination of insulation resistance of an electric DC circuit |
| CN202600102U (en) * | 2012-04-26 | 2012-12-12 | 苏州杰拓腾动力科技有限公司 | High-voltage direct current insulation monitoring device suitable for novel-energy automobile |
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Owner name: SHIJIAZHUANG JTT POWER ENERGY CO., LTD. Free format text: FORMER OWNER: SUZHOU JTT POWER TECHNOLOGY CO., LTD. Effective date: 20131031 |
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Effective date of registration: 20131031 Address after: 050200 Hebei city of Shijiazhuang province Luquan city town actual industrial park Applicant after: SHIJIAZHUANG JTT POWER AND ENERGY CO.,LTD. Address before: Xinghu Street Industrial Park of Suzhou city in Jiangsu province 215021 No. 328 Creative Industry Park 15-505 Applicant before: SUZHOU JIETUOTENG POWER TECHNOLOGY Co.,Ltd. |
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Address after: No.9 Ruining Road, Development Zone, Luquan District, Shijiazhuang City, Hebei Province, 050200 Patentee after: Hebei Jietaite Energy Technology Co.,Ltd. Address before: 050200 Actual Industrial Park, Shangzhuang Town, Luquan City, Shijiazhuang City, Hebei Province Patentee before: SHIJIAZHUANG JTT POWER AND ENERGY CO.,LTD. |