CN201697786U - Insulation testing device for electric automobile - Google Patents
Insulation testing device for electric automobile Download PDFInfo
- Publication number
- CN201697786U CN201697786U CN2009202597524U CN200920259752U CN201697786U CN 201697786 U CN201697786 U CN 201697786U CN 2009202597524 U CN2009202597524 U CN 2009202597524U CN 200920259752 U CN200920259752 U CN 200920259752U CN 201697786 U CN201697786 U CN 201697786U
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- insulation
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- switching part
- resistor
- resistance
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- 238000009413 insulation Methods 0.000 title claims abstract description 46
- 238000012360 testing method Methods 0.000 title claims abstract description 9
- 238000001514 detection method Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 abstract description 17
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Measurement Of Resistance Or Impedance (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
An insulation testing device for an electric automobile comprises an analog quantity collection part and a relay array switching part. A switch is arranged between the analog quantity collection part and the relay array switching part; a to-be-tested electrical system is arranged on the left side of the relay array switching part corresponding to the relay array; and each array of the relay array switching part is provided with a switching switch. The analog quantity collection part comprises a main resistor and a sub-resistor, which have different resistances and are in series connection. Information collection points are arranged at the two ends of the main resistor, and one end of the main resistor is connected with an automobile body; and a virtual insulation resistor (i.e. to-be-tested insulation resistor) is arranged between the automobile body and the electrical system. The insulation testing device provided by the utility model adopts resistance voltage division method and circular testing method to test the insulation resistance of the entire automobile, can locate insulation fault points, and has the characteristics of stable performance, no alternating current signal injection system, long service life, and so on.
Description
Technical field:
The utility model relates to a kind of pick-up unit of automotive performance, refers in particular to a kind of electric automobile insulation detection device.The insulation that is mainly used in electric automobile detects.
Background technology:
Conventional automobile adopts fuel oil or rock gas as power source, seldom there is the High-Voltage Insulation problem, and electric automobile is the electromechanical integrated product of a complexity, wherein relate to the dynamic battery of forceful electric power and insulation, motor, charging set, boosting battery and charging device, and other is by the device of power accumulator power supply, because condition of work is more abominable on the car, vibrations, the corrosion of soda acid gas, the variation of variation of temperature and humidity, all might cause the aging rapidly even damage in insulation of power cable and other insulating material, apparatus insulated intensity is reduced greatly, jeopardize the person and security appliance.
Present stage, main insulation detecting method had:
1, signal injection method: be that high frequency ac signal is injected in the electrical system, the other end connects ground or car body is returned signals collecting, calculate its insulation resistance by the variation of calculating its amplitude and phase place, shortcoming: the one, it is bigger that accuracy in detection is influenced by system's distributed capacitance, the 2nd, inject AC signal to straight-flow system, be actually to straight-flow system and introduced an interference source, influence straight-flow system operate as normal and circuit complexity, cost height, poor stability.
2, current sense method: with positive pole to be measured in the power-supply system and the equidirectional together current sensor that passes of negative pole, when not having leakage current, the electric current that flows out from positive source equals to return the electric current of power cathode, and therefore, the electric current that passes current sensor is zero.Can judge further that according to the positive and negative of this voltage leakage current comes from positive source or negative pole.Must be in running order but the prerequisite of using this detection method is a power supply to be measured, the inflow and the outflow of working current be arranged.Its shortcoming is that it can't estimate power supply insulating property over the ground under the situation of power-supply system zero load, can't leak electricity simultaneously at two ends, or electric leakage detects it in the middle of the system.
3, accessory power supply method method: utilize accumulator, the negative pole of battery positive voltage with high-voltage direct current power supply to be measured linked to each other, battery terminal negative and locomotive casing are realized one point earth, and under the well behaved situation of system insulation to be measured, accumulator does not have current return, leakage current is zero, under the damaged or aging moist situation of cable insulation, accumulator forms the closed-loop path by insulation course, produces leakage current, size according to leakage current is reported to the police, and turn-offs power supply to be measured.Shortcoming is exactly direct one point earth with accumulator clearly, and this never allows on electric automobile.
4, balanced bridge method: the principle of utilizing bridge diagram, we can think that Devices to test straight-flow system positive and negative busbar has a fixing insulation resistance over the ground, these two insulation resistances can be thought to equate under the good situation that insulate, positive and negative terminal can be used as two brachium pontis, can be used as a brachium pontis, two the big resistance of equivalence of can between positive and negative busbar, connecting in addition, it between two resistance brachium pontis, so just constituted a null-type bridge circuit, reometer on the string between ground and two resistance of connecting, under the good situation of insulation, the electric current that flows through between two brachium pontis is zero, in case end insulation descends, electric bridge is out of trim just, and reometer just has electric current to flow through.The shortcoming of this method clearly to the accurate requirement very high (implementing very complicated) of the circuit that makes up, reduces simultaneously and can not accurately and timely report to the police in positive and negative insulating property simultaneously exactly, uses the method itself just to reduce the class of insulation of system.
In addition, all there is above-mentioned variety of issue in existing above-mentioned several insulation detecting methods, therefore necessary this are solved.
The utility model content:
The purpose of this utility model is the deficiency at the insulation detection of existing electric automobile, propose a kind of electric automobile that can effectively solve and to have controlled the car load insulation status in real time, the AC signal that also can avoid simultaneously present other insulation detecting method to bring is injected, or can reduce the insulating property of car load when using seal, can not locate the insulation fault point, the insulation detection device of the electric automobile that complex structure etc. are not enough.
Technology implementation scheme of the present utility model is as follows: a kind of insulation detection device of electric automobile, comprise the analog acquisition part, the relay array switching part, between analog acquisition part and relay array switching part, be provided with switch, correspondingly with relay array on the left side of relay array switching part be connected to tested electrical system, each array of relay array switching part is provided with change-over switch; Described analog acquisition partly is that the resistance of two different resistances is connected in series, and one of them is a main resistor, and one is sub-resistance; Be provided with the information acquisition end points at the two ends of main resistor, and an end of main resistor links to each other with car body; A virtual insulation resistance (i.e. the insulation resistance that will test) was arranged before car body and electrical system.
Advantage of the present utility model is: adopt electric resistance partial pressure method and cycle detection method to combine and detect the car load insulation resistance, have stable performance, no AC signal injected system, can locate characteristics such as insulation fault point, long service life.Utilize corresponding algorithm can effectively solve the deficiency that present electric automobile can not be controlled the car load insulation status in real time, thereby the AC signal that also can avoid present other insulation detecting method to bring is simultaneously injected and is caused accuracy of detection to be subjected to the influence of distributed capacitance, to have introduced an interference source to straight-flow system simultaneously, influences straight-flow system operate as normal and circuit complexity, cost height, poor stability; Or can't under the situation of power-supply system zero load, estimate power supply insulating property over the ground when using it, can't leak electricity simultaneously at two ends; Or can reduce the insulating property of car load when using seal, can not locate the insulation fault point, defectives such as complex structure.Be particularly suitable for the insulation detection device of used for electric vehicle.
Figure of description
Fig. 1 is the utility model structural topology figure;
Fig. 2 detects strategic process figure for the utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
A kind of insulation detection device of electric automobile, comprise analog acquisition part 3, relay array switching part 2, between analog acquisition part 3 and relay array switching part 2, be provided with switch 5, on the left side and the relay array 2 corresponding tested electrical systems 1 that are connected to of relay array switching part 2, each array of relay array switching part 2 is provided with change-over switch 6; The resistance that described analog acquisition part 3 is two different resistances is connected in series, and one of them is that 8, one of main resistors are sub-resistance 7; Be provided with the information acquisition end points at the two ends of main resistor 8, and an end of main resistor 8 links to each other with car body 4; Before car body 4 and electrical system, a virtual insulation resistance 9 (i.e. the insulation resistance that will test) is arranged.
Method of testing of the present utility model is to utilize electric resistance partial pressure method and cycle detection method to combine to detect the car load insulation resistance, whole detection device comprises the analog acquisition part, the relay array switching part, between analog acquisition part and relay array switching part, be provided with detector switch, when switch closure, begin insulation and detect; The corresponding electrical system that is connected on the left side of relay array switching part with relay array, each array of relay array switching part is provided with change-over switch; By switching corresponding change-over switch, can judge that specifically that deposits an electric leakage in the location, goes out the insulation resistance of this point by corresponding algorithm computation.When switching to certain voltage that collects when some when minimum, then there is leaky (if D point leaks electricity, when switch switched to the D point, the voltage that collects was minimum) in this point.So just can locate the insulation fault point.When calculating the insulation resistance occurrence, know that electric leakage, suppose the electric leakage of D point by said method as needs, open the switch that A is ordered this moment, (A point and the D voltage of ordering is learnt by other method and is U) by known resistance R1, can extrapolate the resistance of insulation resistance by respective algorithms.
Claims (1)
1. the insulation detection device of an electric automobile, comprise the analog acquisition part, the relay array switching part, it is characterized in that: between analog acquisition part and relay array switching part, be provided with switch, correspondingly with relay array on the left side of relay array switching part be connected to tested electrical system, each array of relay array switching part is provided with change-over switch; Described analog acquisition partly is that the resistance of two different resistances is connected in series, and one of them is a main resistor, and one is sub-resistance; Be provided with the information acquisition end points at the two ends of main resistor, and an end of main resistor links to each other with car body; A virtual insulation resistance was arranged, i.e. the insulation resistance that will test before car body and electrical system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202597524U CN201697786U (en) | 2009-12-18 | 2009-12-18 | Insulation testing device for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202597524U CN201697786U (en) | 2009-12-18 | 2009-12-18 | Insulation testing device for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201697786U true CN201697786U (en) | 2011-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202597524U Expired - Lifetime CN201697786U (en) | 2009-12-18 | 2009-12-18 | Insulation testing device for electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201697786U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726667B (en) * | 2009-12-18 | 2012-11-14 | 湖南南车时代电动汽车股份有限公司 | Insulation detecting method and device for electric automobile |
| CN102841284A (en) * | 2011-06-22 | 2012-12-26 | 同济大学 | On-line insulated monitoring method for high voltage of electromobile |
| CN104635123A (en) * | 2014-12-23 | 2015-05-20 | 北京新能源汽车股份有限公司 | Device and method for measuring insulation performance of high-voltage wire harness of electric automobile |
| CN107817431A (en) * | 2016-09-13 | 2018-03-20 | 北汽福田汽车股份有限公司 | The high-voltage isulation detecting system and fuel-cell vehicle of fuel-cell vehicle |
| WO2019042127A1 (en) * | 2017-08-29 | 2019-03-07 | 北京新能源汽车股份有限公司 | Fault detection method for high-voltage direct current circuit and high-voltage direct current circuit |
-
2009
- 2009-12-18 CN CN2009202597524U patent/CN201697786U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726667B (en) * | 2009-12-18 | 2012-11-14 | 湖南南车时代电动汽车股份有限公司 | Insulation detecting method and device for electric automobile |
| CN102841284A (en) * | 2011-06-22 | 2012-12-26 | 同济大学 | On-line insulated monitoring method for high voltage of electromobile |
| CN104635123A (en) * | 2014-12-23 | 2015-05-20 | 北京新能源汽车股份有限公司 | Device and method for measuring insulation performance of high-voltage wire harness of electric automobile |
| CN104635123B (en) * | 2014-12-23 | 2017-09-29 | 北京新能源汽车股份有限公司 | Device and method for measuring insulation performance of high-voltage wire harness of electric automobile |
| CN107817431A (en) * | 2016-09-13 | 2018-03-20 | 北汽福田汽车股份有限公司 | The high-voltage isulation detecting system and fuel-cell vehicle of fuel-cell vehicle |
| WO2019042127A1 (en) * | 2017-08-29 | 2019-03-07 | 北京新能源汽车股份有限公司 | Fault detection method for high-voltage direct current circuit and high-voltage direct current circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 412007 Liyu Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province Patentee after: Zhongche Times Electric Vehicle Co.,Ltd. Address before: 412007 Liyu Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province Patentee before: HUNAN CRRC TIMES ELECTRIC VEHICLE Co.,Ltd. Address after: 412007 Liyu Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province Patentee after: HUNAN CRRC TIMES ELECTRIC VEHICLE Co.,Ltd. Address before: 412007 Liyu Industrial Park, Tianyuan District, Zhuzhou City, Hunan Province Patentee before: HUNAN CSR TIMES ELECTRIC VEHICLE Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110105 |
|
| CX01 | Expiry of patent term |