CN103837806A - Insulation degree monitoring alarm device of electric automobile high voltage power supply system - Google Patents
Insulation degree monitoring alarm device of electric automobile high voltage power supply system Download PDFInfo
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- CN103837806A CN103837806A CN201210508569.XA CN201210508569A CN103837806A CN 103837806 A CN103837806 A CN 103837806A CN 201210508569 A CN201210508569 A CN 201210508569A CN 103837806 A CN103837806 A CN 103837806A
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Abstract
An insulation degree monitoring alarm device of an electric automobile high voltage power supply system comprises a DC over-60V electric automobile high voltage power supply, a comparison voltage device, a reference voltage device, an operational amplifier and an output indicator. The DC over-60V electric automobile high voltage power supply is provided with a positive electrode contact and a negative electrode contact. According to the comparison voltage device, the positive electrode contact of the DC over-60V electric automobile high voltage power supply is connected with a resistor and a comparison potential, and the tail end of the comparison voltage device is connected with an automobile body. The reference voltage device is provided with an adjusting resistor stabilivolt and a reference potential which are connected in series, and the tail end of the reference voltage device is connected with the automobile body. The operational amplifier is provided with an input contact of the comparison potential and an input contact of the reference potential, and the two input contacts are connected with each other. The operational amplifier is further connected with the negative electrode and the positive electrode of a DC 12V battery pack. According to the output indicator, an LED light emitting diode and a resistor are in series connection between a positive electrode contact of the DC 12V battery pack and the output end of the operational amplifier. When the insulation resistance value of the automobile body is smaller than or equal to 15 kilohms, electric leakage alarm signals can be given out, workers can be reminded to repair in time, and harm to human bodies is completely eliminated.
Description
Technical field
The present invention relates to B level security system electric automobile high-voltage dynamic power system insulation degree monitoring alarm, belong to electric automobile safety monitoring instrument field.
Technical background
National departments concerned has specified more and more detailed standard to the safety technique index of pure electric automobile, in order to make vehicle can reach higher technical level, many pure electric automobile manufacturers or research and development unit have all done many technological improvements at vehicles dynamic performance (acceleration, deceleration, braking, max. speed) and security protection performance (high-low pressure isolation, system insulation) aspect.
B level security series pure electric automobile refers to that vehicle mounted dynamic battery group operating voltage is configured in the electric automobile between DC60V-DC1000V, the indivedual microminiature vehicle operation of depolarization voltage is DC60V, most vehicle mounted electrics are press-fitted to be put all more than DC144V, far beyond human safety voltage DC48V.Insulation degree between the vehicle body how this system of timely monitor and people often touch.It is the matter of utmost importance that is related to driver and conductor's life security.
The current pathway that the electric automobile personnel of B level security grade get an electric shock is: when human body touch is after high-voltage charged body B+, electric current is through people's direction of flow vehicle body, if when the insulation values between vehicle body and high-voltage charged body B-is less than 15K Ω, the current value that flows to B+ by B-will cause life to threaten to electric shock personnel, and particularly human body resistance can be reduced to below 1000K Ω when summer hidrosis; B level series electric automobile high-voltage insulation resistance is greater than to 100 Ω/V, and to DC144V system vehicle, this insulation meaning resistance should be greater than 15K Ω.By simple computation, in the time that vehicle body insulation resistance is 15K Ω, the current value that flows through electric shock personnel health is 0.14MA, is only 1.4% of life-threatening electric current 10mA.If at this moment just send leakage-current alarm signal, and repair in time, can not work the mischief to human body.
Summary of the invention
The object of the present invention is to provide a kind of electric automobile high-voltage electric power B level security system insulation degree monitoring alarm, in the time that vehicle body insulating resistance value is less than or equal to 15K Ω, send leakage-current alarm signal, to remind staff to repair in time, stop human body to cause any harm.
Technical solution of the present invention: electric automobile high-voltage dynamic power system insulation degree monitoring alarm of the present invention, comprise the above electric automobile high-voltage electrical source of power of DC60V, comparative voltage setting, reference voltage setting, operational amplifier, output instruction, it is characterized in that: the above electric automobile high-voltage electrical source of power of DC60V, it has positive contact B+ and negative contacts B-; During comparative voltage arranges, the positive contact contact resistance of the above electric automobile high-voltage electrical source of power of DC60V and relatively current potential, its end connects vehicle body; During reference voltage arranges, it has adjusting resistance stabilivolt and the reference potential of serial connection, and its end connects vehicle body; Operational amplifier has the output contact of comparison current potential and reference potential, and is connected with above-mentioned potential point respectively; DC12V electric battery is also connected operational amplifier negative input contact and electrode input end contact; In output instruction, between DC12V battery anode tie point and the output terminal of operational amplifier, be connected in series LED light emitting diode, resistance.
Object of the present invention, feature and advantage will be elaborated by reference to the accompanying drawings by embodiment.
Brief description of the drawings
Shown in accompanying drawing, be the circuit theory diagrams of electric automobile high-voltage dynamic power system insulation degree monitoring alarm of the present invention.
Embodiment
Embodiment
As shown in drawings, electric automobile high-voltage dynamic power system insulation degree monitoring alarm of the present invention, comprise that the above electric automobile high-voltage electrical source of power 10 of DC60V, comparative voltage arrange 20, reference voltage arranges 30, operational amplifier LM358, output instruction 40, it is characterized in that: the above electric automobile high-voltage electrical source of power 10 of DC60V, it has positive contact B+ and negative contacts B-; Comparative voltage arranges in 20, positive contact B+ contact resistance Rg1, Rg2, resistance R g3 and the comparison current potential UA of the above electric automobile high-voltage electrical source of power of DC60V, and its end connects vehicle body 50;
Reference voltage arranges in 30, and it has adjusting resistance Rd1, Rd2, stabilivolt D1 and the reference potential UB of serial connection, and its end connects vehicle body 50;
Operational amplifier LM358 has the input contact 3,2 of comparison current potential UA and reference potential UB, and connects respectively; Operational amplifier LM358 also connects negative input contact 4 and the electrode input end contact 8 of DC12V electric battery;
In output instruction 40, between DC12V battery anode tie point and the output terminal 1 of operational amplifier LM358, be connected in series LED light emitting diode D2, resistance R d3.
The above electric automobile high-voltage electrical source of power 10 of DC60V comprises DC60V, DC96V, DC144V, DC 240V, DC360V electric pressure.
According to above electric automobile high-voltage dynamic power system insulation degree monitoring alarm, in such testing circuit, in the time of resistance R g1+Rg2+Rg3+Rg4 (15K Ω)=1015K Ω, its current potential is UA; The parameter of adjusting Rd1, Rd2 and stabilivolt D1, its reference potential is UB; Make reference potential UB point current potential a little more than current potential UA, now circuit output end is noble potential, and LED light emitting diode D2 does not work; No matter be which kind of reason, when insulation resistance, Rg4 reduces, the electric current that flows through human body or various media increases, current potential UA point current potential must rise, in the time crossing reference potential UB point current potential, circuit output state overturns, and luminous two pipe D2 light, represent that system insulation degree starts to decline, need to repair.
Resistance R g1, Rg2, Rg3 are adjusting after setting value, it is all fixed resistance, Rg4 is the unexpected distributed resistance that is present in the various medium compositions between vehicle body and the above electric automobile high-voltage electrical source of power of DC60V negative pole B-, such as humid air, all kinds of impurity, human body etc., as long as insulating resistance value is less than or equal to 15K Ω, LED light emitting diode D2 in output instruction sends leakage-current alarm signal, to remind staff to repair in time, stops human body to cause any harm.
Claims (2)
1. an electric automobile high-voltage dynamic power system insulation degree monitoring alarm, comprise the above electric automobile high-voltage electrical source of power of DC60V (10), comparative voltage setting (20), reference voltage setting (30), operational amplifier (LM358), output instruction (40), it is characterized in that: the above electric automobile high-voltage dynamic power system of DC60V (10), it has positive contact (B+) and negative contacts (B-); Comparative voltage arranges in (20), positive contact (B+) contact resistance (Rg1, Rg2), resistance (Rg3) and the comparison current potential (UA) of the above electric automobile high-voltage electrical source of power of DC60V (10), its output termination vehicle body (50);
Reference voltage arranges in (30), and it has adjusting resistance (Rd1, Rd2), stabilivolt (D1) and the reference potential (UB) of serial connection, its output termination vehicle body (50);
Operational amplifier (LM358) has the input contact (3,2) of comparison current potential (UA) and reference potential (UB), and connects respectively; Operational amplifier (LM358) is also connected negative input contact (4) and the electrode input end contact (8) of electric battery (DC12V);
In output instruction (40), between the anodal tie point of electric battery (DC12V) and the output terminal (1) of operational amplifier (LM358), be connected in series LED light emitting diode (D2), resistance (Rd3).
2. according to monitoring alarm claimed in claim 1, it is characterized in that: the above electric automobile high-voltage electrical source of power of DC60V (10) comprises DC60V, DC96V, DC144V, DC 240V, DC360V electric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210508569.XA CN103837806A (en) | 2012-11-21 | 2012-11-21 | Insulation degree monitoring alarm device of electric automobile high voltage power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210508569.XA CN103837806A (en) | 2012-11-21 | 2012-11-21 | Insulation degree monitoring alarm device of electric automobile high voltage power supply system |
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| CN103837806A true CN103837806A (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210508569.XA Pending CN103837806A (en) | 2012-11-21 | 2012-11-21 | Insulation degree monitoring alarm device of electric automobile high voltage power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085013A (en) * | 2017-06-08 | 2017-08-22 | 深圳市松恩电子科技有限公司 | A kind of biological identification device |
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| CN1404578A (en) * | 2000-02-22 | 2003-03-19 | 三洋电机株式会社 | Circuit for detecting leakage in power supply |
| CN101060242A (en) * | 2006-04-18 | 2007-10-24 | 湖北盛佳电器设备有限公司 | Current anomaly protective circuit |
| US20100308841A1 (en) * | 2007-09-28 | 2010-12-09 | Continental Automotive Gmbh | Circuit arrangement for monitoring an electrical insulation |
| CN201886117U (en) * | 2010-09-29 | 2011-06-29 | 京滨电子装置研究开发(上海)有限公司 | Insulation detection circuit of electrically-propelled vehicle |
| CN102362185A (en) * | 2009-03-23 | 2012-02-22 | Sk新技术 | Insulation resistance measuring circuit free from influence of battery voltage |
| CN102426326A (en) * | 2011-09-08 | 2012-04-25 | 惠州市亿能电子有限公司 | Detection method of electric automobile insulating performance |
| CN102706094A (en) * | 2012-06-28 | 2012-10-03 | 黄勇 | Refrigeration house temperature overrun reminding device |
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2012
- 2012-11-21 CN CN201210508569.XA patent/CN103837806A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1404578A (en) * | 2000-02-22 | 2003-03-19 | 三洋电机株式会社 | Circuit for detecting leakage in power supply |
| CN101060242A (en) * | 2006-04-18 | 2007-10-24 | 湖北盛佳电器设备有限公司 | Current anomaly protective circuit |
| US20100308841A1 (en) * | 2007-09-28 | 2010-12-09 | Continental Automotive Gmbh | Circuit arrangement for monitoring an electrical insulation |
| CN102362185A (en) * | 2009-03-23 | 2012-02-22 | Sk新技术 | Insulation resistance measuring circuit free from influence of battery voltage |
| CN201886117U (en) * | 2010-09-29 | 2011-06-29 | 京滨电子装置研究开发(上海)有限公司 | Insulation detection circuit of electrically-propelled vehicle |
| CN102426326A (en) * | 2011-09-08 | 2012-04-25 | 惠州市亿能电子有限公司 | Detection method of electric automobile insulating performance |
| CN102706094A (en) * | 2012-06-28 | 2012-10-03 | 黄勇 | Refrigeration house temperature overrun reminding device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107085013A (en) * | 2017-06-08 | 2017-08-22 | 深圳市松恩电子科技有限公司 | A kind of biological identification device |
| CN107085013B (en) * | 2017-06-08 | 2024-01-09 | 深圳市松恩电子科技有限公司 | Biological recognition device |
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Application publication date: 20140604 |