CN107356848A - A kind of insulation detection device - Google Patents
A kind of insulation detection device Download PDFInfo
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- CN107356848A CN107356848A CN201710728875.7A CN201710728875A CN107356848A CN 107356848 A CN107356848 A CN 107356848A CN 201710728875 A CN201710728875 A CN 201710728875A CN 107356848 A CN107356848 A CN 107356848A
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- 238000009413 insulation Methods 0.000 title claims abstract description 103
- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 238000012360 testing method Methods 0.000 claims abstract description 65
- 238000004891 communication Methods 0.000 claims abstract description 41
- 230000005611 electricity Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 21
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
Abstract
The present invention provides a kind of insulation detection device, is related to the state of insulation detection technique field of electric automobile, and the insulation detection device includes：Microprocessor；Controller area network communication module, the first power module, second source module, modulus a/d converter, display and the button being connected respectively with the microprocessor；Voltage test module, it is connected respectively with the CAN communication module, the second source module and the a/d converter；Megger test module, it is connected respectively with the CAN communication module, the second source module and the a/d converter；Selecting switch group, connected respectively with the voltage test module, the megger test module with the CAN communication module.The solution of the present invention, the efficiency and accuracy of detection of the state of insulation detection of electric automobile are improved, reduce the personal safety risk of operating personnel.
Description
Technical field
The invention belongs to the technical field that the state of insulation of electric automobile detects, and is filled more particularly, to a kind of Insulation monitoring
Put.
Background technology
Electric automobile turns into the important component of automobile market as a kind of vehicles of energy-conserving and environment-protective at present,
Because electric automobile includes high-pressure system, the magnitude of voltage of the high-pressure system considerably beyond safe voltage rank, it is therefore, electronic
The high-pressure system of automobile needs have very reliable insulating properties, to ensure the peace of the normal operation of electric automobile and user
Entirely.
In the prior art, the insulating properties of the high-pressure system of electric automobile is detected, method detection is whole generally by disassembling manually
The insulation fault of car, this detection mode it is less efficient, and certain security risk in detection process be present；Therefore, such as
What improves the efficiency of the Insulation monitoring of electric automobile and ensures that the personal safety of testing staff is current urgent problem.
The content of the invention
It is an object of the invention to provide a kind of insulation detection device, solves the Insulation monitoring effect of prior art electric automobile
Rate is low and detection process in the problem of security risk be present.
To achieve these goals, the embodiments of the invention provide a kind of insulation detection device, the insulation detection device
Including：
Microprocessor；
The controller LAN (Controller Area Network, abbreviation CAN) being connected respectively with the microprocessor
Communication module, the first power module, second source module, modulus (Anlolog Digital, abbreviation AD) converter, display
And button；
Voltage test module, it is connected with the CAN communication module, the second source module and the a/d converter；
Megger test module, connect with the CAN communication module, the second source module and the a/d converter
Connect；
Selecting switch group, with the voltage test module, the megger test module and the CAN communication module connect
Connect.
Wherein, the insulation detection device also includes：
The first interface being connected with the selecting switch group, wherein, the fast charge interface of the first interface and electric automobile
Matching；
The second interface being connected with the voltage test module, wherein, the battery bag of the second interface and electric automobile
Wiring port match, and the second interface includes anode interface and negative pole interface, when the second interface and battery bag
Wiring port connection when, the positive pole connection of the anode interface and battery bag, the negative pole of the negative pole interface and battery bag connects
Connect.
Wherein, the selecting switch group includes：First voltage input, second voltage input, first voltage output end,
Second voltage output end and control terminal；
Wherein, the first relay is provided between the first voltage input and the first voltage output end, it is described
The second relay is provided between first voltage input and the second voltage output end；
Wherein, the 3rd relay is provided between the second voltage input and the first voltage output end, it is described
The 4th relay is provided between second voltage input and the second voltage output end；
Wherein, the control terminal is by the first CAN transceiver control terminal with first relay respectively, and described second
The control terminal of relay, the control terminal of the 3rd relay, and, the control terminal connection of the 4th relay.
Wherein, the first voltage output end is connected with the voltage test module；The second voltage output end and institute
State the connection of megger test module；The control terminal is connected by CAN with the CAN communication module；First electricity
Pressure input, the second voltage input and the CAN are connected with the first interface.
Wherein, the first voltage input is connected by the positive vehicle bus of the first interface and the electric automobile
Connect；The second voltage input is connected by the first interface with the negative vehicle bus of the electric automobile；The CAN is total
Line is connected with the entire car controller of electric automobile and the battery management system of electric automobile respectively by the first interface.
Wherein, the voltage test module includes：Voltmeter, first choice switch, first resistor, the second selecting switch and
Second CAN transceiver；
Wherein, the positive supply input of the voltmeter and negative supply input are connected with the second source module；
The output end of the voltmeter is connected with the a/d converter；The positive terminal of the voltmeter passes through the second selecting switch point
It is not connected with selecting switch group, anode interface and negative pole interface；The first choice switch and the first resistor are connected on institute
State between the positive terminal of voltmeter and negative terminals；The control terminal of the first choice switch and second selection are opened
The control terminal of pass, it is connected by the second CAN transceiver with the CAN communication module.
Wherein, the insulation detection device also includes the first controlling switch；Wherein, first controlling switch and described the
The control terminal of two selecting switch connects with the CAN communication module.
Wherein, the megger test module includes：
3rd CAN transceiver, Insulation Resistance Tester and the 3rd selecting switch；Wherein, the Insulation Resistance Tester
The negative supply input of positive supply input and the Insulation Resistance Tester is connected with the second source module；It is described exhausted
The output end of edge resistance meter is connected with the a/d converter；The positive terminal of the Insulation Resistance Tester passes through described
3rd selecting switch is connected with the second voltage output end；The negative terminals ground connection of the Insulation Resistance Tester；It is described
The control terminal of 3rd selecting switch, it is connected by the 3rd CAN transceiver with the CAN communication module.
Wherein, the insulation detection device also includes the second controlling switch；Wherein, second controlling switch and described the
The control terminal of three selecting switch connects with the 3rd CAN transceiver.
Wherein, the insulation detection device also includes：Wireless Fidelity (Wireless Fidelity, abbreviation WIFI) module,
The WIFI module is connected with the microprocessor.
The above-mentioned technical proposal of the present invention at least has the advantages that：
The embodiment of the present invention is by being to be connect with the fast charge of the electric automobile by the Interface design of the insulation detection device
The interface that mouth matches, realizes and the electric automobile is connected and led to the insulation detection device by way of plug
News, Insulation monitoring can be carried out so as to realize without disassembling the electric automobile；Operating personnel pass through the insulation detection device
Button is after the insulation detection device issues control signal, and the insulation detection device is automatic right according to the control signal
The high-pressure system of the electric automobile is detected, so as to improve the efficiency of the Insulation monitoring of the electric automobile and detection essence
Degree, while also ensure that the personal safety of operating personnel.
Brief description of the drawings
Fig. 1 is the schematic diagram of the insulation detection device of the embodiment of the present invention；
Fig. 2 is the selecting switch group internal structure of the embodiment of the present invention and the schematic diagram being connected with miscellaneous part；
Fig. 3 is the voltage test module internal structure of the embodiment of the present invention and the schematic diagram being connected with miscellaneous part；
Fig. 4 is the megger test inside modules structure of the embodiment of the present invention and the schematic diagram being connected with miscellaneous part；
Fig. 5 is the connection diagram of the first interface of the embodiment of the present invention, second interface and electric automobile.
Description of reference numerals：
1- microprocessors, 2-CAN communication modules, 3- voltage test modules, 4- the first power module 5- second source modules,
6-AD converters, 7- displays, 8- buttons, 9- megger test modules, 10- switch selection groups, 11-WIFI modules, 12- the
One controlling switch, the controlling switches of 13- second, 14-CAN buses, 15- first interfaces, 161- second interfaces, 161A- anode interfaces,
161B- negative pole interfaces, 17- electric automobiles, 18- entire car controllers, 19- battery management systems, the relays of 101- first, 102-
Two relays, the relays of 103- the 3rd, the relays of 104- the 4th, the CAN transceivers of 105- first, the CAN transceivers of 31- second, K1-
First choice switchs, the selecting switch of K2- second, R1- first resistors, the selecting switch of K3- the 3rd, the CAN transceivers of 91- the 3rd, V-
Voltmeter, R- Insulation Resistance Testers.
Embodiment
To make the technical problem to be solved in the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and tool
Body embodiment is described in detail.
The embodiment of the present invention disconnects vehicle bus and passes through insulaion resistance again for needing in the prior art after automobile is risen
The problem of tester carries out Insulation monitoring, causes Insulation monitoring complex operation, and efficiency is low and measurement accuracy is not high, there is provided a kind of
Insulation detection device.
As shown in figure 1, the embodiments of the invention provide insulation detection device, the insulation detection device includes：
Microprocessor 1；The CAN communication module 2 that is connected respectively with the microprocessor 1, first the 4, second electricity of power module
Source module 5, a/d converter 6, display 7 and button 8；Voltage test module 3, with the CAN communication module 2, second electricity
Source module 5 and the a/d converter 6 connect；Megger test module 9, with the CAN communication module 2, the second source
Module 3 and the a/d converter 6 connect；Selecting switch group 10, with the voltage test module 3, the megger test mould
Block 9 and the CAN communication module 2 connect.
The above embodiment of the present invention, user input testing requirements to the microprocessor 1 by the button 8, wherein,
The testing requirements include：Detect vehicle insulating properties, the insulating properties of load for detecting electric automobile and the selection of detection range.Institute
State the first power module 4 and be used to be the microprocessor 1 offer voltage, make the microprocessor 1 in running order.It is described micro-
Processor 1 is used for according to the testing requirements, and corresponding relay in the electric automobile is controlled by the CAN communication module 2
Device is closed or disconnected, the disconnection of the selecting switch group 10 and closure, and, the voltage test module 3 or the insulation are surveyed
Whether die trial block 9 works, meanwhile, control the output of second source module 5 magnitude of voltage corresponding with the detection range；When
After detection, pass through the output display result of display 7.Operating personnel input testing requirements by the button 8, and lead to
Cross the display 7 and check testing result, avoid operating personnel detect manually electric automobile insulating properties produce it is dangerous
Possibility, and detection efficiency is improved, reduce the error detected manually.
Wherein, the insulation detection device also includes：WIFI module 11, the WIFI module 11 and the microprocessor 1
Connection.The WIFI module 11 is used to, by the insulation detection device and network connection, the insulation detection device be detected
As a result record and be uploaded to network, testing result is analyzed according to big data, so as to the high pressure to the electric automobile 17
The insulation ag(e)ing of system and cycle are judged, are realized the purpose changed in time, are additionally operable to make with the electric automobile 17
With according to the testing result of record, adjusting the threshold value of the insulaion resistance of the electric automobile 17 in real time, avoid the occurrence of erroneous judgement
Phenomenon, cause, due to the reason such as high-temperature insulation aging and leakage short circuit, to make vehicle spontaneous combustion.
Wherein, the insulation detection device also includes：
The first interface 15 being connected with the selecting switch group 10, wherein, as shown in figure 5, the first interface 15 and electricity
The fast charge Interface Matching of electrical automobile 17；The insulation detection device is fast by the first interface 15 and the electric automobile 17
The plug of interface is filled, realizes connection and disconnection with the electric automobile 17.Enter so as to avoid for the electric automobile 17
During row Insulation monitoring, the electric automobile 17 is risen and disconnects the process of bus, improves the efficiency of Insulation monitoring.
The second interface 161 being connected with the voltage test module 3, wherein, the second interface 161 and electric automobile 17
Battery bag Wiring port matching, when the second interface 161 is connected with the Wiring port of the battery bag, described second
Anode interface 161A in interface 161 is connected with the positive pole of the battery bag, the negative pole interface 161B in the second interface 161
It is connected with the negative pole of the battery bag.When needing individually to carry out Insulation monitoring to the battery bag, the electricity can opened
After the cabin cover of electrical automobile 17, the connector of the battery bag bus is disconnected, by the form of plug, by the second interface
161 with the Wiring port grafting of battery bag.So as to realize that the insulation detection device detects the battery bag of the electric automobile 17
Insulating properties.
Embodiments of the invention, in order that the battery bag that the insulation detection device can be implemented as different automobile types is carried out absolutely
Edge is detected, and connection assist is additionally provided between the second interface 161 and the battery bag Wiring port, and the auxiliary connects
One end of fitting matches with the second interface 161, and the other end of the connection assist matches with the Wiring port of battery bag.
By this connected mode, after realizing plug connection, without carrying out other operations, can just complete to the exhausted of the battery bag
The detection of edge, improves detection efficiency；By changing connection assist, the insulation to the battery bag of different automobile types can be achieved with
The detection of property, saves testing cost.
Specifically, as shown in Fig. 2 the selecting switch group 10 includes：First voltage input, second voltage input,
First voltage output end, second voltage output end and control terminal.
Wherein, the first voltage output end is connected with the voltage test module 3；For testing the electric automobile 17
Vehicle insulating properties.
Wherein, the second voltage output end is connected with the megger test module 9；For testing the electronic vapour
The insulating properties of the load of car 17.
Wherein, the control terminal is connected by the CAN 14 with the CAN communication module 2；For controlling the first electricity
Press input and the connection or disconnection of first voltage output end, second voltage input and company's on-off of first voltage output end
Open, first voltage input and the connection or disconnection of second voltage output end, and, second voltage input and second voltage are defeated
Go out the connection or disconnection at end.
Specifically, the first relay 101 is provided between the first voltage input and the first voltage output end,
The second relay 102 is provided between the first voltage input and the second voltage output end；The second voltage is defeated
Enter and be provided with the 3rd relay 103, the second voltage input and described second between end and the first voltage output end
The 4th relay 104 is provided between voltage output end；The control terminal is by the first CAN transceiver 105 respectively with described
The control terminal of one relay 101, the control terminal of second relay 102, the control terminal of the 3rd relay 103, and,
The control terminal connection of 4th relay 104.
In addition, as shown in figure 5, the first voltage input, the second voltage input and the CAN 14 are equal
It is connected with the first interface 15, and is connected by the first interface 15 with the fast charge interface of the electric automobile 17.Specifically
, the first voltage input is connected by the first interface 15 with the positive vehicle bus of the electric automobile 17；It is described
Second voltage input is connected by the first interface 15 with the negative vehicle bus of the electric automobile 17；The CAN
14 are connected by the first interface 15 and the entire car controller 18 of electric automobile 17 and the battery management system 19 of electric automobile 17
Connect.
As shown in figure 3, the voltage test module 3 includes：Voltmeter V, first choice switch K1, first resistor R1 and the
Two selecting switch K2, the second CAN transceiver 31.
Wherein, the positive supply input of the voltmeter V and negative supply input connect with the second source module 4
Connect；The signal that the second source module 4 is sent according to the microprocessor 1 received, electricity is provided for the voltmeter V
Pressure.
The output end of the voltmeter V is connected with the a/d converter 6；By the magnitude of voltage of the analog quantity detected export to
The a/d converter 6, for the magnitude of voltage of analog quantity to be converted into digital quantity, and export to the microprocessor 1, eventually through
The display 7 is shown.
The positive terminal of the voltmeter V by the second selecting switch K2 respectively with selecting switch group 10, anode interface
161A connects with negative pole interface 161B；Wherein, the anode interface 161A and negative pole interface 161B is used for described electronic
After the battery bag of automobile 17 separates with vehicle bus, the battery bag wiring that is set in the enging cabin by the electric automobile 17
Port, it is connected with the battery bag, so as to carry out Insulation monitoring to the battery bag.The final plug realized by interface, it is real
Single Insulation monitoring now is carried out to the battery bag, so as to improve the security of detection efficiency and detection.
The first choice switch K1 and first resistor R1 is connected on the positive terminal and negative pole of the voltmeter V
Between terminals.
Specifically, by taking vehicle insulating properties detection process as an example, the K1 and first resistor R1 is switched to the first choice
Purposes illustrate：The positive vehicle bus detected when the first choice switch K1 disconnects is obtained first relative to the first of ground
Magnitude of voltage U1Second voltage value U with negative vehicle bus relative to ground2；Then, when obtaining the first choice switch K1 closures,
Detection positive vehicle bus relative to ground third voltage value U3The 4th magnitude of voltage U with negative vehicle bus relative to ground4；Finally
According to formula：
Calculate the insulating resistance value of vehicle.Wherein, R1For the resistance value of the first resistor R1,
RiFor the insulating resistance value of vehicle.It should be noted that the U in formula1、U2、U3And U4Take absolute value.
It should be noted that the battery is calculated according to the magnitude of voltage of the magnitude of voltage and negative pole of battery bag positive pole over the ground over the ground
The insulating resistance value of bag is not limited to aforesaid way, can also get the first voltage value U1With the second voltage value
U2Afterwards, by the first voltage value U1With the second voltage value U2It is compared, if first voltage value U1 is more than the described second electricity
During pressure value, then after closing first choice switch K1, third voltage value U is only tested3, and according to formula
The insulating resistance value of the battery bag is calculated, therefore, any mode improved through the above way is in the protection model of the present invention
In enclosing.
Certainly, when individually being detected to the insulating properties of the battery bag, test process and the survey of vehicle insulating properties detection
Examination process is identical.
Wherein, the control terminal of the first choice switch K1 and the control terminal of the second selecting switch K2, pass through respectively
Second CAN transceiver 31 is connected with the CAN communication module 2.Second CAN transceiver 31 is according to the CAN communication module 2
The control signal of transmission, control closure and the disconnection of the first choice switch K1 and the second selecting switch K2.
Wherein, as shown in figure 3, the insulation detection device also includes the first controlling switch 12；First controlling switch
12 are used for the insulating resistance value of manual test battery bag.Wherein, first controlling switch 12 and the second selecting switch K2
Connected with the CAN communication module 2.It is determined that vehicle insulation be unsatisfactory for require and load isolation meet require when, in the electricity
In the front deck of electrical automobile, after the bus for disconnecting battery bag, personnel control first controlling switch 12 manually, described so as to control
Second selecting switch K2 is connected with the anode interface 161A, and the information for detecting battery bag insulaion resistance is passed through into described second
CAN transceiver 31 communicates with the CAN communication module 2, detects the magnitude of voltage of the positive pole of battery bag over the ground.After the completion of detection, institute
To state CAN communication module 2 control the second selecting switch K2 and negative pole interface 161B to connect, and detects the negative pole of battery bag over the ground
Magnitude of voltage, after being closed again first choice switch K1, battery bag positive pole magnitude of voltage over the ground and negative pole are detected respectively over the ground
Magnitude of voltage, and finally confirm the insulating resistance value of battery bag.
As shown in figure 4, the megger test module 9 includes：
3rd CAN transceiver 91, Insulation Resistance Tester R and the 3rd selecting switch K3；Wherein, the megger test
Instrument R positive supply input and the negative supply input of the Insulation Resistance Tester are connected with the second source module 5；
The second source module 5 is used to provide voltage for the Insulation Resistance Tester R.The output of the Insulation Resistance Tester R
End is connected with the a/d converter 6；For the insulating resistance value of detection to be converted into digital output to the microprocessor 1,
And finally shown on the display 7.The positive terminal of the Insulation Resistance Tester R passes through the 3rd selecting switch
K3 is connected with the second voltage output end；The negative terminals input end grounding of the Insulation Resistance Tester R；Described 3rd
Selecting switch K3 control terminal, it is connected by the 3rd CAN transceiver 91 with the CAN communication module 2, it is described for making
CAN communication module 2 controls closure and the disconnection of the 3rd selecting switch K3.
Wherein, the insulation detection device also includes the second controlling switch 13；Wherein, second controlling switch 13 is distinguished
It is connected with the control terminal of the 3rd selecting switch K3 and the 3rd CAN transceiver 91.Wherein, second controlling switch 13
For realizing the insulating properties of manual test vehicle and load.
The process detected to the insulating properties of the electric automobile 17 is as follows：
When carrying out Insulation monitoring to vehicle, first, the fast charge of the first interface 15 and the electric automobile 17 is connect
Mouth connection, personnel input vehicle Insulation monitoring signal and testing range to the microprocessor 1 by the button 8, described micro-
Processor 1 according to the control signal of the Insulation monitoring signal output vehicle Insulation monitoring to the CAN communication module 2, meanwhile,
The microprocessor 1 controls the second source module 5 to export corresponding magnitude of voltage to the voltage and surveyed according to testing range
Die trial block 3；
Then, the CAN communication module 2 controls the second selecting switch K2 and described the by the CAN 14
One voltage output end turns on, and passes through the CAN 14 and the entire car controller 18 and battery management of the electric automobile 17
System 19 communicates, and controls the 7th relay K7 and the 8th relay K8 to close by the entire car controller 17, by institute
Stating battery management system 19 controls the 6th relay K6 and the 5th relay K5 to close, and after the completion of precharge, controls institute
State the 9th relay K9 closures.
After above-mentioned relay all closes, the CAN communication module 2 controls described first by the CAN 14
Relay 101 closes, and tests the first voltage value of positive vehicle bus over the ground；Control the first choice switch K1 closures, test
The second voltage value of positive vehicle bus over the ground；Control that first relay 101 disconnects and the 3rd relay 103 closes again
Close, test the third voltage value of negative vehicle bus over the ground；The first choice switch K1 closures are controlled, test negative vehicle bus pair
4th magnitude of voltage on ground；And by the a/d converter 6 respectively by the first voltage value, the second voltage value, described
Three magnitudes of voltage and the 4th magnitude of voltage are converted to digital quantity, the first voltage by the microprocessor 1 according to digital quantity
Value, the second voltage value, the third voltage value and the 4th magnitude of voltage, calculate the vehicle insulation of the electric automobile 17
Resistance value.
The vehicle insulating resistance value of calculating compared with the first secure threshold to prestore, is worked as institute by the microprocessor 1
When stating vehicle insulating resistance value and being less than the first insulaion resistance threshold value, there is insulation fault in the electric automobile 17；Further
Load and battery bag to the electric automobile 17 carry out Insulation monitoring.
When carrying out Insulation monitoring to load, first, personnel pass through the input load Insulation monitoring signal of button 8 and survey
The control that examination range detects to the microprocessor 1, the microprocessor 1 according to the Insulation monitoring signal output load isolation
Signal to the CAN communication module 2, meanwhile, the microprocessor 1 controls the second source module 5 defeated according to testing range
Go out corresponding magnitude of voltage to the megger test module 9.
Then, the CAN communication module 2 controls the 3rd selecting switch K2 to close by the CAN 14, makes institute
State Insulation Resistance Tester R to turn on the second voltage output end, and pass through the CAN 14 and the electric automobile 17
Entire car controller 18 communicate, control the 7th relay K7 and the 8th relay K8 to close by the entire car controller 17
Close.
After above-mentioned relay all closes, the CAN communication module 2 controls described second by the CAN 14
Relay 102 closes, and tests the first resistor value of positive vehicle bus over the ground；Second relay 102 is controlled to disconnect and institute again
State the 4th relay 104 to close, test the second resistance value of negative vehicle bus over the ground；And by the a/d converter 6 respectively by institute
State first resistor value and the second resistance value be converted to digital quantity, by the microprocessor 1 first resistor value and
The second resistance value, the less insulating resistance value for load of resistance.When the insulating resistance value is less than the second insulaion resistance
During threshold value, determine that insulation fault occurs in the load.
When there is insulation fault in vehicle and load insulation fault does not occur, it is necessary to carry out Insulation monitoring to battery bag.It is first
The front hatch cover of the electric automobile 17 is first opened, vehicle bus and battery bag are disconnected, by the second interface 161 and battery bag
Wiring port connection, the first controlling switch 12 described in manual closing, make the second selecting switch K2 and the anode interface
161A is connected, meanwhile, the signal that detection battery bag state of insulation is exported by second CAN transceiver 31 leads to the CAN
Interrogate module 2；Communicated by the CAN communication module 2 by the CAN 14 and the battery management system 19, make described
Six relay K6 and the 5th relay K5 closures, after the completion of precharge, the 9th relay K9 closures are controlled, according still further to whole
The method of car insulaion resistance detection tests first voltage value and second voltage value of the battery bag positive pole relative to ground；Then it is described
CAN communication module 2 controls the second selecting switch K2 to be connected with the negative pole interface 161B, is examined according still further to vehicle insulaion resistance
The method of survey tests battery bag negative pole relative to the third voltage value and the 4th magnitude of voltage on ground, finally calculates the exhausted of the battery bag
Edge resistance value, when the insulating resistance value of the battery bag is less than the 3rd insulaion resistance threshold value, determine the battery bag failure.
It should be noted that the embodiment of the present invention can also set sensor on each high-voltage load, it is determined that the electricity
When insulation fault occurs in the load of electrical automobile 17, the sensor is used for the insulating resistance value for obtaining each high-voltage load, and reports
To entire car controller, entire car controller reads the insulating resistance value of each high-voltage load, and finally sentence by being communicated with external computer
It is disconnected the load of insulation fault occur.
The above embodiment of the present invention, by by the first interface 15 of the insulation detection device and the electric automobile 17
Fast charge Interface Matching, realize and be connected the insulation detection device with the electric automobile 17 by way of plug, keep away
When having exempted from manual test, it is necessary to the process for rising the electric automobile 17, improve detection efficiency.The embodiment of the present invention passes through
The microprocessor 1 realizes the insulating properties of electric automobile 17 described in automatic detection, reduces manually operated test error, carries
High measuring accuracy；Meanwhile reduce the possibility that hyperbaric environment damages to personnel.The embodiment of the present invention passes through increase by the
One controlling switch 12 and the second controlling switch 13, realizing can the manual and can automatic opening insulation detection device detection institute
State the mode of the insulating properties of electric automobile 17.
Described above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, on the premise of principle of the present invention is not departed from, some improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
- A kind of 1. insulation detection device, it is characterised in that including：Microprocessor (1)；The controller area network communication module (2) that is connected respectively with the microprocessor (1), the first power module (4), Two power modules (5), modulus a/d converter (6), display (7) and button (8)；Voltage test module (3), with the CAN communication module (2), the second source module (5) and the a/d converter (6) Connection；Megger test module (9), with the CAN communication module (2), the second source module (5) and the AD conversion Device (6) connects；Selecting switch group (10), with the voltage test module (3), the megger test module (9) and the CAN communication Module (2) connects.
- 2. insulation detection device according to claim 1, it is characterised in that the insulation detection device also includes：The first interface (15) being connected with the selecting switch group (10), wherein, the first interface (15) and electric automobile (17) fast charge Interface Matching；The second interface (161) being connected with the voltage test module (3), wherein, the second interface (161) and electric automobile (17) Wiring port of battery bag matches, and the second interface (161) includes anode interface (161A) and negative pole interface (161B), when the second interface (161) is connected with the Wiring port of battery bag, the anode interface (161A) and battery bag Positive pole connection, the negative pole interface (161B) is connected with the negative pole of battery bag.
- 3. insulation detection device according to claim 2, it is characterised in that the selecting switch group (10) includes：First Voltage input end, second voltage input, first voltage output end, second voltage output end and control terminal；Wherein,It is provided with the first relay (101) between the first voltage input and the first voltage output end, described first The second relay (102) is provided between voltage input end and the second voltage output end；It is provided with the 3rd relay (103) between the second voltage input and the first voltage output end, described second The 4th relay (104) is provided between voltage input end and the second voltage output end；The control terminal is by the first CAN transceiver (105) control terminal with first relay (101) respectively, and described The control terminal of two relays (102), the control terminal of the 3rd relay (103), and, the 4th relay (104) Control terminal connects.
- 4. insulation detection device according to claim 3, it is characterised in thatThe first voltage output end is connected with the voltage test module (3)；The second voltage output end is connected with the megger test module (9)；The control terminal is connected by CAN (14) with the CAN communication module (2)；The first voltage input, the second voltage input and the CAN (14) with the first interface (15) connect.
- 5. insulation detection device according to claim 4, it is characterised in thatThe first voltage input is connected by the first interface (15) with the positive vehicle bus of the electric automobile (17)；The second voltage input is connected by the first interface (15) with the negative vehicle bus of the electric automobile (17)；The CAN (14) passes through the first interface (15) entire car controller (18) and electricity with electric automobile (17) respectively Battery management system (19) connection of electrical automobile (17).
- 6. insulation detection device according to claim 3, it is characterised in that the voltage test module (3) includes：Voltage Table (V), first choice switch (K1), first resistor (R1), the second selecting switch (K2) and the second CAN transceiver (31)；Wherein,The positive supply input and negative supply input of the voltmeter (V) are connected with the second source module (5)；The output end of the voltmeter (V) is connected with the a/d converter (6)；The positive terminal of the voltmeter (V) is connect with selecting switch group (10), positive pole respectively by the second selecting switch (K2) Mouth (161A) and negative pole interface (161B) connection；The first choice switch (K1) and the first resistor (R1) are connected on the positive terminal of the voltmeter (V) and born Between the terminals of pole；The control terminal of the first choice switch (K1) and the control terminal of second selecting switch (K2), pass through the 2nd CAN Transceiver (31) is connected with the CAN communication module (2).
- 7. insulation detection device according to claim 6, it is characterised in that the insulation detection device also includes the first control System switch (12)；Wherein, first controlling switch (12) is led to the control terminal of second selecting switch (K2) and the CAN Interrogate module (2) connection.
- 8. insulation detection device according to claim 3, it is characterised in that the megger test module includes：3rd CAN transceiver (91), Insulation Resistance Tester (R) and the 3rd selecting switch (K3)；Wherein,The positive supply input of the Insulation Resistance Tester (R) and the negative supply input of the Insulation Resistance Tester (R) It is connected with the second source module (5)；The output end of the Insulation Resistance Tester (R) is connected with the a/d converter (6)；The positive terminal of the Insulation Resistance Tester (R) is defeated by the 3rd selecting switch (K3) and the second voltage Go out end connection；The negative terminals ground connection of the Insulation Resistance Tester (R)；The control terminal of 3rd selecting switch (K3), pass through the 3rd CAN transceiver (91) and the CAN communication module (2) connect.
- 9. insulation detection device according to claim 8, it is characterised in that the insulation detection device also includes the second control System switch (13)；Wherein, the control terminal and the described 3rd of second controlling switch (13) and the 3rd selecting switch (K3) CAN transceiver (91) connects.
- 10. insulation detection device according to claim 1, it is characterised in that the insulation detection device also includes：Wireless Fidelity WIFI module (11), the WIFI module (11) are connected with the microprocessor (1).
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| CN201710728875.7A CN107356848B (en) | 2017-08-23 | 2017-08-23 | Insulation detection device |
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| CN201710728875.7A CN107356848B (en) | 2017-08-23 | 2017-08-23 | Insulation detection device |
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