CN202330559U - Automobile insulating resistor detecting circuit - Google Patents
Automobile insulating resistor detecting circuit Download PDFInfo
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- CN202330559U CN202330559U CN 201120498695 CN201120498695U CN202330559U CN 202330559 U CN202330559 U CN 202330559U CN 201120498695 CN201120498695 CN 201120498695 CN 201120498695 U CN201120498695 U CN 201120498695U CN 202330559 U CN202330559 U CN 202330559U
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Abstract
The utility model relates to an automobile insulating resistor detecting circuit comprising detecting resistors R1-R6, a current source I and a current source II. The automobile body is regarded as ground, a battery positive end is connected with the current source I and the detecting resistor R1 sequentially though a controlled switch I, while the other end of the detecting resistor R1 is grounded; a battery negative end is connected with the current source II and the detecting resistor R2sequentially though a controlled switch II, while the other end of the detecting resistor R2 is grounded; the detecting resistors R3 and R5 are connected in series and then connected between the controlled switch I and the ground; the detecting resistors R6 and R4 are connected in series and then connected between the controlled switch I and the ground; all connecting wires in the circuit refer to double-layer teflon leads with diameter of 2.14-2.26mm; and both the current source I and the current source II are realized by the adoption of a PWM (Pulse-Width Modulation) signal control transformer. In the detecting circuit, direct current sources are adopted and the detecting resistors are matched with certain leads so as to realize detection to vehicle-mounted insulating resistors, the higher detection precision of the result is ensured and the requirements of customers are met.
Description
Technical field
The utility model relates to automobile technical field, specifically is meant a kind of automobile insulation resistance testing circuit.
Background technology
In order to reach certain electric pressure, usually the multiple batteries series connection to be used in the electric automobile, voltage range is between 300-500V.In the middle of the actual motion of electric automobile, the working environment more complicated, reasons such as the variation of vibration abrasion, temperature and humidity, liquid corrosion all can cause the decline of insulating property, jeopardize occupant's personal safety.Therefore, the insulation detection technique is the important technology that electric automobile concerns personal safety.
Existing insulation measurement method mainly is divided into AC method and DC-method.AC method is through being injected into high frequency ac signal in the electric loop, then according to feeding back the amplitude of signal and insulation resistance is calculated in the variation of phase place.DC-method is generally accomplished through the mode of measurement insulation resistance.This method thinks that vehicle dc bus both positive and negative polarity to be measured respectively has a fixing insulation resistance over the ground; These two resistance equate under the good situation that insulate; Detect the loop in addition and between positive and negative busbar and ground, also seal in two substitutional resistances and sample circuit; When insulation resistance changed, the voltage that sampling circuit is adopted back can change, and just can release insulation resistance according to certain formula then.This method is very high to the detection system accuracy requirement, and the resistance that detection system seals in can not be too big, otherwise influence measuring accuracy.The utility model promptly provides a kind of electric automobile insulation resistance testing circuit to dc measurement.
Summary of the invention
The problem that the utility model need solve provides a kind of high-precision electric automobile insulation resistance testing circuit.
For addressing the above problem, the utility model is taked following technical scheme:
A kind of automobile insulation resistance testing circuit comprises and detects resistance R 1-R6 and current source one and current source two; Look car body and be ground, the anode end is connected with current source one, detection resistance R 1 through controlled switch one successively, detects resistance R 1 other end ground connection; GND is connected with current source two, detection resistance R 2 through controlled switch two successively, detects resistance R 2 other end ground connection; Be connected between controlled switch one and the ground after detecting resistance R 3, R5 series connection, be connected between controlled switch one and the ground after detection resistance R 6, the R4 series connection; All to adopt diameter be the double-deck Teflon lead of 2.14-2.26mm to connecting line in the said circuit.
Preferably, between current source one and controlled switch one, also be connected with diode D1, it is anodal that current source one meets diode D1; Between current source two and controlled switch two, be connected to diode D2, current source two connects diode D2 negative pole.
Concrete, said current source one all adopts the pwm signal control transformer to realize with current source two.
Compared with prior art, the utlity model has following beneficial effect: adopt DC current source in the said testing circuit, detect the detection that resistance cooperation particular lead realizes vehicle-mounted insulation resistance, guarantee that the result has the higher detection precision, meets customer need.
Description of drawings
Fig. 1 is said testing circuit embodiment principle schematic.
Embodiment
In order to make those skilled in the art can understand the content of the utility model better, the utility model is done further elaboration below in conjunction with accompanying drawing and embodiment.
Like Fig. 1, the composition of the automobile insulation resistance testing circuit that present embodiment disclosed is following: look car body and be ground, the anode end is connected resistance R 1 other end ground connection through controlled switch J1 with current source S1, detection resistance R 1 successively.GND is connected resistance R 2 other end ground connection successively through controlled switch J2 with current source S2, resistance R 2.Between current source S1 and controlled switch J1, also be connected with diode D1, it is anodal that current source S1 meets diode D1; Between current source S2 and controlled switch S2, be connected to diode D2, current source S2 connects diode D2 negative pole.Be connected between controlled switch J1 and the ground after detecting resistance R 3, R5 series connection, be connected between controlled switch J2 and the ground after detection resistance R 6, the R4 series connection.
Controlled switch in the foregoing circuit adopts relay; Current source adopts main control chip output pwm signal control transformer former limit winding and then control transformer secondary winding output voltage to realize detecting the effect that the electric current electric current injects; It is the double-deck Teflon lead of 2.14-2.26mm that connecting line all adopts diameter, and requirement should the withstand voltage 600V of bilayer Teflon lead.Foregoing circuit only just carries out insulating monitoring under battery-operated pattern, in taking the bar operational process, need not carry out insulating monitoring.According to the difference of insulation resistance, state of insulation is divided into two kinds: insulation resistance is judged as normally greater than 0.3M Ω, is lower than 0.3M Ω and is judged as insulation fault, and general redirect interval is 0.3 ~ 0.35M Ω.
During detection; Through the Combination Control of governor circuit to two relay switches and two PWM; Detect the voltage and current of the both positive and negative polarity of battery through resistance R 1, R2, R3 and R4 to car body; And then through a series of calculating, obtain anode to car body, negative pole insulation resistance RA, RB to car body.Injection current signal wherein by the PWM control transformer, through a series of rectification, is injected in the middle of the insulation resistance through diode, has widened the scope of sampling, makes the sampling accuracy obtain good raising.
This insulation testing circuit testing result can send to vehicle CAN bus with state of insulation through the CAN bus; Transmission information comprises that the bus positive pole is to the insulation resistance between the vehicle chassis; The bus negative pole is to the insulation resistance between the vehicle chassis, the class of insulation and life-information.
Need to prove; Under the situation that does not deviate from the utility model spirit and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (3)
1. automobile insulation resistance testing circuit; Comprise and detect resistance R 1-R6 and current source one and current source two; It is characterized in that: look car body and be ground, the anode end is connected with current source one, detection resistance R 1 through controlled switch one successively, detects resistance R 1 other end ground connection; GND is connected with current source two, detection resistance R 2 through controlled switch two successively, detects resistance R 2 other end ground connection;
Be connected between controlled switch one and the ground after detecting resistance R 3, R5 series connection, be connected between controlled switch one and the ground after detection resistance R 6, the R4 series connection;
All to adopt diameter be the double-deck Teflon lead of 2.14-2.26mm to connecting line in the said circuit.
2. automobile insulation resistance testing circuit according to claim 1 is characterized in that,
Between current source one and controlled switch one, also be connected with diode D1, it is anodal that current source one meets diode D1; Between current source two and controlled switch two, be connected to diode D2, current source two connects diode D2 negative pole.
3. automobile insulation resistance testing circuit according to claim 2 is characterized in that, said current source one all adopts the pwm signal control transformer to realize with current source two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120498695 CN202330559U (en) | 2011-12-05 | 2011-12-05 | Automobile insulating resistor detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120498695 CN202330559U (en) | 2011-12-05 | 2011-12-05 | Automobile insulating resistor detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202330559U true CN202330559U (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120498695 Expired - Fee Related CN202330559U (en) | 2011-12-05 | 2011-12-05 | Automobile insulating resistor detecting circuit |
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| CN (1) | CN202330559U (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798760A (en) * | 2012-08-16 | 2012-11-28 | 阳光电源股份有限公司 | Method and circuit fir detecting ground insulation impedance of photovoltaic array |
| CN103472306A (en) * | 2013-09-06 | 2013-12-25 | 富奥汽车零部件股份有限公司 | Method and system for detecting high voltage insulation of electric automobile |
| CN103576064A (en) * | 2013-10-28 | 2014-02-12 | 惠州市亿能电子有限公司 | Insulation detection circuit with calibration module and calibration method thereof |
| CN103675591A (en) * | 2013-12-09 | 2014-03-26 | 惠州市亿能电子有限公司 | Multipoint insulation fault detection circuit of power battery output bus |
| CN104569597A (en) * | 2014-12-18 | 2015-04-29 | 北京新能源汽车股份有限公司 | Method and device for detecting insulation resistance of power battery |
| CN105527498A (en) * | 2014-09-28 | 2016-04-27 | 比亚迪股份有限公司 | Electric vehicle, and method and device for detecting high-voltage component ground insulation resistance |
| CN106053947A (en) * | 2016-07-11 | 2016-10-26 | 北京长城华冠汽车科技股份有限公司 | Insulation resistance detection circuit and method of electric automobile power battery, and electric automobile |
| CN106291112A (en) * | 2016-10-27 | 2017-01-04 | 宁德时代新能源科技股份有限公司 | Insulation resistance detection circuit and method |
| CN107422185A (en) * | 2017-03-29 | 2017-12-01 | 江门市甜的电器有限公司 | A kind of insulation resistance of DC system observation circuit, system and method |
| CN107976575A (en) * | 2016-10-23 | 2018-05-01 | 重庆邮电大学 | A kind of type insulation monitoring system of electric automobile |
| CN108490258A (en) * | 2018-02-10 | 2018-09-04 | 深圳硕日新能源科技有限公司 | A kind of detection circuit and detection method of photovoltaic generating system ground insulation resistance |
| CN108680793A (en) * | 2018-07-10 | 2018-10-19 | 天津职业技术师范大学 | A kind of pure electric automobile insulating resistor detecting circuit and its detection method |
| CN108957135A (en) * | 2018-06-26 | 2018-12-07 | 顺科新能源技术股份有限公司 | A kind of electric automobile insulation resistance on-line measurement system and its method |
| CN109324231A (en) * | 2018-12-03 | 2019-02-12 | 苏州共元自控技术有限公司 | A kind of batteries of electric automobile group direct current insulation against ground resistor detecting device and method |
| CN109541486A (en) * | 2018-11-14 | 2019-03-29 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of method and system detecting power battery insulation |
| CN109696581A (en) * | 2017-10-24 | 2019-04-30 | 上海汽车集团股份有限公司 | A kind of insulating resistor detecting circuit and its control method of power battery |
-
2011
- 2011-12-05 CN CN 201120498695 patent/CN202330559U/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798760B (en) * | 2012-08-16 | 2015-05-20 | 阳光电源股份有限公司 | Method and circuit fir detecting ground insulation impedance of photovoltaic array |
| CN102798760A (en) * | 2012-08-16 | 2012-11-28 | 阳光电源股份有限公司 | Method and circuit fir detecting ground insulation impedance of photovoltaic array |
| CN103472306A (en) * | 2013-09-06 | 2013-12-25 | 富奥汽车零部件股份有限公司 | Method and system for detecting high voltage insulation of electric automobile |
| CN103472306B (en) * | 2013-09-06 | 2016-04-13 | 富奥汽车零部件股份有限公司 | A kind of electric automobile high-voltage insulation detecting method and system |
| CN103576064A (en) * | 2013-10-28 | 2014-02-12 | 惠州市亿能电子有限公司 | Insulation detection circuit with calibration module and calibration method thereof |
| CN103576064B (en) * | 2013-10-28 | 2016-08-24 | 惠州市亿能电子有限公司 | A kind of Insulation monitoring calibration steps with calibration module |
| CN103675591A (en) * | 2013-12-09 | 2014-03-26 | 惠州市亿能电子有限公司 | Multipoint insulation fault detection circuit of power battery output bus |
| CN103675591B (en) * | 2013-12-09 | 2016-08-17 | 惠州市亿能电子有限公司 | A kind of electrokinetic cell output bus multipoint insulation fault detection circuit |
| CN105527498B (en) * | 2014-09-28 | 2019-01-11 | 比亚迪股份有限公司 | The detection method and device of electric car and its high voltage component insulation against ground resistance |
| CN105527498A (en) * | 2014-09-28 | 2016-04-27 | 比亚迪股份有限公司 | Electric vehicle, and method and device for detecting high-voltage component ground insulation resistance |
| CN104569597A (en) * | 2014-12-18 | 2015-04-29 | 北京新能源汽车股份有限公司 | Method and device for detecting insulation resistance of power battery |
| CN106053947A (en) * | 2016-07-11 | 2016-10-26 | 北京长城华冠汽车科技股份有限公司 | Insulation resistance detection circuit and method of electric automobile power battery, and electric automobile |
| CN107976575A (en) * | 2016-10-23 | 2018-05-01 | 重庆邮电大学 | A kind of type insulation monitoring system of electric automobile |
| CN106291112A (en) * | 2016-10-27 | 2017-01-04 | 宁德时代新能源科技股份有限公司 | Insulation resistance detection circuit and method |
| CN106291112B (en) * | 2016-10-27 | 2019-06-18 | 宁德时代新能源科技股份有限公司 | Insulation resistance detection circuit and method |
| CN107422185A (en) * | 2017-03-29 | 2017-12-01 | 江门市甜的电器有限公司 | A kind of insulation resistance of DC system observation circuit, system and method |
| CN109696581A (en) * | 2017-10-24 | 2019-04-30 | 上海汽车集团股份有限公司 | A kind of insulating resistor detecting circuit and its control method of power battery |
| CN108490258A (en) * | 2018-02-10 | 2018-09-04 | 深圳硕日新能源科技有限公司 | A kind of detection circuit and detection method of photovoltaic generating system ground insulation resistance |
| CN108957135A (en) * | 2018-06-26 | 2018-12-07 | 顺科新能源技术股份有限公司 | A kind of electric automobile insulation resistance on-line measurement system and its method |
| CN108680793A (en) * | 2018-07-10 | 2018-10-19 | 天津职业技术师范大学 | A kind of pure electric automobile insulating resistor detecting circuit and its detection method |
| CN108680793B (en) * | 2018-07-10 | 2023-04-28 | 天津职业技术师范大学 | Insulation resistance detection circuit and detection method for pure electric vehicle |
| CN109541486A (en) * | 2018-11-14 | 2019-03-29 | 东软睿驰汽车技术（沈阳）有限公司 | A kind of method and system detecting power battery insulation |
| CN109324231A (en) * | 2018-12-03 | 2019-02-12 | 苏州共元自控技术有限公司 | A kind of batteries of electric automobile group direct current insulation against ground resistor detecting device and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20191205 |
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| CF01 | Termination of patent right due to non-payment of annual fee |