CN103376359A - High-voltage direct current insulation monitoring device suitable for new energy automobile - Google Patents
High-voltage direct current insulation monitoring device suitable for new energy automobile Download PDFInfo
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- CN103376359A CN103376359A CN2012101247731A CN201210124773A CN103376359A CN 103376359 A CN103376359 A CN 103376359A CN 2012101247731 A CN2012101247731 A CN 2012101247731A CN 201210124773 A CN201210124773 A CN 201210124773A CN 103376359 A CN103376359 A CN 103376359A
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- 238000009413 insulation Methods 0.000 title claims abstract description 38
- 238000012806 monitoring device Methods 0.000 title abstract description 6
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 230000004888 barrier function Effects 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 230000005284 excitation Effects 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation 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
- 238000005070 sampling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
The invention relates to a high-voltage direct current insulation monitoring device suitable for a new energy automobile. The high-voltage direct current insulation monitoring device comprises a device body and is characterized in that an excitation source component is arranged inside the device body, and the output end of the excitation source component is connected with the A point connecting end of a Wheatstone bridge component; meanwhile, the B point connecting end of the Wheatstone bridge component is connected with a differential amplifying input end, the D point connecting end of the Wheatstone bridge component is connected with the input end of a voltage insulation component, and the output end of the voltage insulation component is a battery detection end; moreover, the C point connecting end of the Wheatstone bridge component is provided with a common land. Thus, an insulation resistance value is close to an actual value, precision is high, and sensitivity is high. Meanwhile, the range of monitoring insulation resistance is large. Moreover, the high-voltage direct current insulation monitoring device is simple in whole structure, and capable of effectively lowering hardware cost and simplifying software calculation processing.
Description
Technical field
The present invention relates to a kind of monitoring device, relate in particular to a kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile.
Background technology
With regard to the monitoring device that the existing market provides, hybrid power and pure electric vehicle power system have comprised an independent high-tension battery power source at present, threaten driver and passenger safety in order to prevent the high-voltage power supply electric leakage.Therefore, electronic system must detect the insulation impedance value on the relative vehicle body with the high voltage negative output terminal of high voltage power source high-voltage positive electrode output terminal ground whether in the safety value scope.Prior art is most of to be the electric signal of periodically sampling (positive DC power bus and negative DC power bus), and calculates the ground insulation index.
Summary of the invention
Purpose of the present invention is exactly in order to solve the above-mentioned problems in the prior art, and a kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile is provided.
Purpose of the present invention is achieved through the following technical solutions:
A kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile, include device body, wherein: be provided with the driving source assembly in the described device body, 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 amplification, the D point cohesive end of described Wheatstone bridge assembly is by the input end of voltage barrier assembly, the output terminal of described voltage barrier assembly is the 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 that is applicable to new-energy automobile, wherein:
Further, above-mentioned a kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile, wherein: described Wheatstone bridge assembly is provided with two groups of arms, the first arm is by A point cohesive end, B point cohesive end, C point cohesive end consists of, the second arm is by A point cohesive end, D point cohesive end, C point cohesive end consists of, 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 the B point cohesive end, described the first arm equates with the resistance ratio of the second arm.
Further, above-mentioned a kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile, wherein: described driving source assembly includes the 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 that is 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: the insulation impedance value is high, highly sensitive near actual value, precision.Simultaneously, monitoring insulation impedance scope is large.And unitary construction of the present invention is simple, can effectively reduce hardware cost, simplifies the software computing.
Description of drawings
Purpose of the present invention, advantage and disadvantage will be for illustration and explanation by the non-limitative illustration of following preferred embodiment.These embodiment only are the prominent examples of using technical solution of the present invention, and all technical schemes of taking to be equal to replacement or equivalent transformation and forming all drop within the scope of protection of present invention.
Fig. 1 is the organigram that originally is applicable to the high voltage direct current insulation monitoring and warning device of new-energy automobile;
Fig. 2 is the high voltage direct current insulation monitoring and warning device circuit theory synoptic diagram that originally is applicable to new-energy automobile.
Embodiment
A kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile as shown in Figure 1 and Figure 2 includes device body 1, and its unusual part is: be provided with driving source assembly 2 in the 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.Simultaneously, the B of Wheatstone bridge assembly 3 point cohesive end is connected with the input end of differential amplification module 8, and the D point cohesive end of Wheatstone bridge assembly 3 is by the input end of voltage barrier assembly.Simultaneously, the output terminal of voltage barrier assembly is the battery detecting end.Consider the needs of ground connection, be provided with publicly 4 at the C of Wheatstone bridge assembly 3 point cohesive end.
With regard to the better embodiment of the present invention one, the Wheatstone bridge assembly 3 that the present invention adopts is provided with two groups of arms.Specifically, the first arm is made of A point cohesive end, B point cohesive end, C point cohesive end, and the second arm is made of A point cohesive end, D point cohesive end, C point cohesive end.And, correct running for Wheatstone bridge assembly 3, between 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, D point cohesive end and B point cohesive end, be distributed with resistance, be respectively resistance 9A, 9B, 9C, 9D, 9E, 9F, 9G.Simultaneously, the first arm equates with the resistance ratio of the second arm.
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.Simultaneously, be connected into the A point cohesive end of Wheatstone bridge assembly 3 at the output terminal of amplifier module 6.Thus, be used for producing the alternating voltage waveform of one or more changes, such as sine wave, square wave, pulse and saw row ripple etc.And above waveform may be periodic, also may be transient state.
Again further, in order to improve the effect of voltage isolation, be convenient to simultaneously actual manufacturing and implement, the 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 the high resistant resistance for DC current, so can not flowing to by capacitance component 7, high-voltage DC power supply 11 holds virtually 10.In the application of reality, can increase some elements and prevent that electric current from flowing through Wheatstone bridge assembly 3 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 signals to affect Wheatstone bridge assembly 3, 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 simultaneously.
In conjunction with actual operating position of the present invention, when Wheatstone bridge assembly 3 balance, flow through A point cohesive end from driving source assembly 2 and form B point cohesive ends and D point cohesive end equipressure current potential to Wheatstone bridge assembly 3, thus do not have electric current from D point point cohesive end to resistance 9E, resistance 9F, resistance 9G be to B point cohesive end.
When driving source assembly 2 is excited, diminish because capacitance component 7 shows the impedance meeting, so driving source assembly 2 electric currents may be 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 of holding virtually 10, this grounding path and resistance 9D walk abreast.The result causes resistance value between D and the C to be not equal to resistance value between B and the D, therefore flows to Wheatstone bridge assembly 3 electric currents from A and makes B point and D point produce voltage difference before.Insulating resistance value on the inefficacy High-Voltage Insulation module 12 will be reflected in B to the current value between the D, namely the voltage drop on the resistance 9F.Therefore specifically, inefficacy High-Voltage Insulation module 12 is in state of insulation when normal condition, can be considered infinitely great resistance, (in the time of certainly can setting greater than certain value according to practical application-such as 1 megaohm, for state of insulation good).In case disabler occurs, when the resistance of this moment will be worth less than certain, such as 10K Europe.Judge the High-Voltage Insulation inefficacy this moment.In this situation, hold virtually 10 conductings.Like this, can form the corresponding signal information that provides by top hardware, carry out computing through processor and calculate the direct supply insulation values, judge the insulation situation.Simultaneously, because the existence of capacitance component 7 can flow to Wheatstone bridge assembly 2 by the isolated DC power supply.In simple terms, during this period can be by the state of Wheatstone bridge assembly 2 monitoring high-voltage DC power supplies 11 leakage currents.Utilize simultaneously driving source assembly 2 that driving voltage or electric current are provided.
When other behaviours in service of invention, hold virtually the high direct voltage resistance value on 10 loops to calculate according to the relation of inefficacy High-Voltage Insulation module 12 output voltage values and alternating voltage source module 5 magnitudes of voltage.In some cases, differential amplification module 8 output voltage values are sent to BCU and process, and driving source voltage is produced by circuit driving source assembly 2, is the value of having known, so BCU can calculate insulating resistance value according to these signal values.
Can find out that by above-mentioned character express behind employing the present invention, the insulation impedance value is high, highly sensitive near actual value, precision.Simultaneously, monitoring insulation impedance scope is large.And unitary construction of the present invention is simple, can effectively reduce hardware cost, simplifies the software computing.
Claims (4)
1. high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile, include device body, it is characterized in that: be provided with the driving source assembly in the described device body, 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 amplification, the D point cohesive end of described Wheatstone bridge assembly is by the input end of voltage barrier assembly, the output terminal of described voltage barrier assembly is the battery detecting end, and the C point cohesive end of described Wheatstone bridge assembly is provided with publicly.
2. a kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile according to claim 1, it is characterized in that: described Wheatstone bridge assembly is provided with two groups of arms, the first arm is by A point cohesive end, B point cohesive end, C point cohesive end consists of, the second arm is by A point cohesive end, D point cohesive end, C point cohesive end consists of, 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 the B point cohesive end, described the first arm equates with the resistance ratio of the second arm.
3. a kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile according to claim 1, it is characterized in that: described driving source assembly includes the 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.
4. a kind of high voltage direct current insulation monitoring and warning device that is applicable to new-energy automobile according to claim 1, it is characterized in that: 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 true CN103376359A (en) | 2013-10-30 |
| CN103376359B CN103376359B (en) | 2015-10-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108072792A (en) * | 2016-11-18 | 2018-05-25 | 马亨德拉雷瓦电动汽车有限公司 | For monitoring the system and method for the isolation in high-voltage system |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3111549A1 (en) * | 1980-03-28 | 1982-01-14 | R. Alkan & Cie, 94460 Valenton | PROGRAMMABLE WIRING TEST DEVICE |
| DE3122549A1 (en) * | 1981-06-06 | 1982-12-23 | 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 measuring system for strain-gauge measuring technology |
| JPH11248766A (en) * | 1998-03-02 | 1999-09-17 | Totsu Denshi Kk | Apparatus for measuring resistance value |
| US6683464B2 (en) * | 2002-03-01 | 2004-01-27 | Kavlico Corporation | Stabilized conductivity sensing system |
| US20050073325A1 (en) * | 2003-10-01 | 2005-04-07 | Rasmus Rettig | Method and circuit arrangement for offset correction of a measurement bridge |
| US20070199386A1 (en) * | 2006-02-24 | 2007-08-30 | Fujitsu Limited | Sample resistance measurement device |
| WO2010050673A2 (en) * | 2008-10-30 | 2010-05-06 | 한국표준과학연구원 | Resistance measuring apparatus and measuring method |
| CN101930968A (en) * | 2009-06-17 | 2010-12-29 | 意法半导体(鲁塞)公司 | The integrated circuit (IC) chip recognition component |
| CN102288823A (en) * | 2009-12-10 | 2011-12-21 | 江森自控帅福得先进能源动力***有限责任公司 | Determination of insulation resistance of an electric DC circuit |
| US20120092032A1 (en) * | 2008-12-24 | 2012-04-19 | Jean-Philippe Bourgoin | Device for characterising electric or electronic components |
| 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 |
-
2012
- 2012-04-26 CN CN201210124773.1A patent/CN103376359B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3111549A1 (en) * | 1980-03-28 | 1982-01-14 | R. Alkan & Cie, 94460 Valenton | PROGRAMMABLE WIRING TEST DEVICE |
| DE3122549A1 (en) * | 1981-06-06 | 1982-12-23 | 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 measuring system for strain-gauge measuring technology |
| JPH11248766A (en) * | 1998-03-02 | 1999-09-17 | Totsu Denshi Kk | Apparatus for measuring resistance value |
| US6683464B2 (en) * | 2002-03-01 | 2004-01-27 | Kavlico Corporation | Stabilized conductivity sensing system |
| US20050073325A1 (en) * | 2003-10-01 | 2005-04-07 | Rasmus Rettig | Method and circuit arrangement for offset correction of a measurement bridge |
| US20070199386A1 (en) * | 2006-02-24 | 2007-08-30 | Fujitsu Limited | Sample resistance measurement device |
| WO2010050673A2 (en) * | 2008-10-30 | 2010-05-06 | 한국표준과학연구원 | Resistance measuring apparatus and measuring method |
| US20120092032A1 (en) * | 2008-12-24 | 2012-04-19 | Jean-Philippe Bourgoin | Device for characterising electric or electronic components |
| CN101930968A (en) * | 2009-06-17 | 2010-12-29 | 意法半导体(鲁塞)公司 | The integrated circuit (IC) chip recognition component |
| CN102288823A (en) * | 2009-12-10 | 2011-12-21 | 江森自控帅福得先进能源动力***有限责任公司 | 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108072792A (en) * | 2016-11-18 | 2018-05-25 | 马亨德拉雷瓦电动汽车有限公司 | For monitoring the system and method for the isolation in high-voltage system |
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| Publication number | Publication date |
|---|---|
| CN103376359B (en) | 2015-10-21 |
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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. |