CN108482127A - A kind of electric automobile high-voltage interlocking loop and breaking localization method - Google Patents
A kind of electric automobile high-voltage interlocking loop and breaking localization method Download PDFInfo
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- CN108482127A CN108482127A CN201810278062.7A CN201810278062A CN108482127A CN 108482127 A CN108482127 A CN 108482127A CN 201810278062 A CN201810278062 A CN 201810278062A CN 108482127 A CN108482127 A CN 108482127A
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- voltage comparator
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a kind of electric automobile high-voltage interlocking loop and breaking localization methods, and high-voltage interlocking circuit includes voltage detecting circuit, generating circuit from reference voltage, voltage comparator circuit and electronic control unit.Breaking localization method is that voltage detecting circuit voltage comparator into voltage comparator circuit exports detectable voltage signals；Generating circuit from reference voltage voltage comparator output reference voltage signal into pressure comparator circuit；Detectable voltage signals are compared by voltage comparator with reference voltage signal, generate two level digital switching signals, and input to electronic control unit.Electronic control unit judges the integrality of high voltage loop of electric automobile by the way that the two level digital switching signals that voltage comparator generates analyze and determine with the integrality in high-voltage interlocking circuit, and reference is provided for the repair and troubleshooting of high voltage loop of electric automobile.
Description
Technical field
The invention belongs to electric automobile high-voltage safety control technology fields more particularly to a kind of electric automobile high-voltage to interlock back
Road and breaking localization method.
Background technology
High-voltage interlocking circuit is a kind of electric vehicle safe design measure monitoring high tension loop integrality with low-voltage signal,
Its monitoring objective is the high-tension connector for needing manual operation to realize circuit connecting and disconnecting in electric vehicle.It powers on and opens in vehicle
In dynamic or charging process, if high-voltage interlocking circuit detects that high tension loop is imperfect, system can not power on or charge, and keep away
Exempt to cause the accident because of the problems such as virtual connection；If vehicle collision causes, high-tension connector loosens or maintenance worker is due to accidentally
Operation causes high-tension connector to loosen, electric under execution system by being detected to high-voltage interlocking signal, to reduce the general of risk generation
Rate.
Currently, the high-voltage interlocking circuit used on electric vehicle generally judges high tension loop by detecting its break-make
Integrality, the high-tension connector for occurring loosening can not be accurately positioned, be unfavorable for repair and the failure of high voltage loop of electric automobile
It excludes.
Invention content
Aiming to solve the problem that can not be accurately positioned that the problem of failure, this hair occurs in which high-tension connector in the prior art
Bright first solved technical problem is to provide a kind of electric automobile high-voltage interlocking loop, is high voltage loop of electric automobile
Repair and troubleshooting provide reference.
The inventive concept total as one, another technical problem solved by the invention are to provide a kind of electric vehicle
High-voltage interlocking open circuit localization method.
In order to solve the first technical problem mentioned above, the technical solution adopted in the present invention is：A kind of electric automobile high-voltage is mutual
Lock loop, the high-voltage interlocking circuit include voltage detecting circuit, generating circuit from reference voltage, voltage comparator circuit and automatically controlled
Unit；
The detection voltage of the voltage detecting circuit and the reference voltage of the generating circuit from reference voltage are the voltage
The input signal of voltage comparator in comparator circuit, the output signal of the voltage comparator is as the defeated of the electronic control unit
Enter signal.
Further, the voltage detecting circuit includes the first order voltage detecting circuit being connected in parallel and the inspection of the second step voltage
One end of slowdown monitoring circuit, the first order voltage detecting circuit and the second level voltage detecting circuit is electrically connected with low-tension supply
It connects, the other end is grounded；
The first order voltage detecting circuit includes concatenated first detection unit and second detection unit, first inspection
It includes the first bridge being connected in series with and first resistor to survey unit, and the second detection unit includes the second bridge being connected in series with
Connect device and second resistance；First bridge, second bridge height corresponding with high voltage loop of electric automobile respectively
Pressure connector integrates, and is disconnected prior to the high-tension connector when disconnection；
The second level voltage detecting circuit includes concatenated third detection unit and the 4th detection unit, the third inspection
It includes the third bridge being connected in series with and 3rd resistor to survey unit, and the 4th detection unit includes the 4th bridge being connected in series with
Connect device and the 4th resistance；The third bridge, the 4th bridge height corresponding with high voltage loop of electric automobile respectively
Pressure connector integrates, and is disconnected prior to the high-tension connector when disconnection.
Further, the detection voltage of the voltage detecting circuit includes that the first output detects voltage and the second output inspection
Survey voltage；
The first output detection voltage be the first detection unit and the second detection unit tie point with connect
Voltage between place；
The second output detection voltage be the third detection unit and the 4th detection unit tie point with connect
Voltage between place.
Further, in the first order voltage detecting circuit, concatenated first bridge and the first resistor with
First capacitance is in parallel, and concatenated second bridge is in parallel with the second resistance and the second capacitance, first inspection
Second bridge for surveying the first resistor and the second detection unit of unit is connected in series with；
In the second level voltage detecting circuit, the concatenated third bridge and the 3rd resistor and third capacitance
It is in parallel, concatenated 4th bridge is in parallel with the 4th resistance with the 4th capacitance, the third detection unit
The 4th bridge of the 3rd resistor and the 4th detection unit is connected in series with.
Further, the first resistor, the resistance value phase of the second resistance, the 3rd resistor and the 4th resistance
Together.
Further, described generating circuit from reference voltage one end is electrically connected with low-tension supply, other end ground connection；
The generating circuit from reference voltage includes the 5th resistance, the 6th resistance and the 7th resistance being sequentially connected in series, institute
It states the 6th resistor coupled in parallel and is connected with the first zener diode, the 7th resistor coupled in parallel is connected with the second zener diode, described
First zener diode is connected with second zener diode.
Further, the reference voltage of the generating circuit from reference voltage includes that the first output reference voltage and second are defeated
Go out reference voltage；
First output reference voltage is between the 5th resistance and the 6th resistance between tie point and earth point
Voltage；
Second output reference voltage is between the 6th resistance and the 7th resistance between tie point and earth point
Voltage；
5th resistance, the 6th resistance are identical with the resistance value of the 7th resistance.
Further, the voltage comparator circuit includes four voltage comparators；
The in-phase input end of first voltage comparator is connect with the inverting input of second voltage comparator, and is connected to institute
State the first output detection voltage；The inverting input of the in-phase input end of tertiary voltage comparator and the 4th voltage comparator connects
It connects, and is connected to the second output detection voltage；The inverting input of the first voltage comparator and the tertiary voltage
The inverting input of comparator connects, and is connected to first output reference voltage, while passing through the 5th capacity earth；It is described
The in-phase input end of second voltage comparator is connect with the in-phase input end of the 4th voltage comparator, and is connected to described
Two output reference voltages, while passing through the 6th capacity earth；
The first voltage comparator, the second voltage comparator, the tertiary voltage comparator and the 4th electricity
The output end of pressure comparator is electrically connected with the ports I/O of the electronic control unit.
To solve above-mentioned second technical problem, used technical solution of the invention is：A kind of electric automobile high-voltage
The breaking localization method of interlocking, the method includes following step：
(1) voltage detecting circuit in the high-voltage interlocking circuit is to voltage ratio described in the voltage comparator circuit
Detectable voltage signals are exported compared with device；
(2) generating circuit from reference voltage in the high-voltage interlocking circuit is to electric described in the voltage comparator circuit
Press comparator output reference voltage signal；
(3) voltage comparator in the high-voltage interlocking circuit compares detectable voltage signals and reference voltage signal
Compared with, two level digital switching signals of generation, and it is input to the ports I/O of the electronic control unit；
(4) electronic control unit is by dividing the two level digitals switching signal that the voltage comparator generates
Analysis judges the integrality in high-voltage interlocking circuit, orients the high-tension connector of failure, generation failure code, and to power electric
Pond manages electrically operated instruction under system BMS is sent.
Specific breaking localization method based on the high-voltage interlocking loop structure that above-mentioned most preferred embodiment is presented, the method packet
Include following step：
(1) electronic control unit detects the output signal of the first voltage comparator, and judges the first voltage ratio
Whether the output signal compared with device is low level；If the output signal of the first voltage comparator is not equal to low level, table
Bright second bridge disconnects, and the high-tension connector integrated with second bridge is faulty, and enters step (5)；Such as
The output signal of first voltage comparator described in fruit is equal to low level, then enters step (2)；
(2) electronic control unit detects the output signal of the second voltage comparator, and judges the second voltage ratio
Whether the output signal compared with device is low level；If the output signal of the second voltage comparator is not equal to low level, institute
The disconnection of the first bridge is stated, the high-tension connector integrated with first bridge is faulty, enters step (5)；If described
The output signal of second voltage comparator is equal to low level, then enters step (3)；
(3) electronic control unit detects the output signal of the tertiary voltage comparator, and judges the tertiary voltage ratio
Whether the output signal compared with device is low level；If the output signal of the tertiary voltage comparator is not equal to low level, institute
The disconnection of the 4th bridge is stated, the high-tension connector integrated with the 4th bridge is faulty, enters step (5)；If described
The output signal of tertiary voltage comparator is equal to low level, then enters step (4)；
(4) electronic control unit detects the output signal of the 4th voltage comparator, and judges the 4th voltage ratio
Whether the output signal compared with device is low level；If the output signal of the 4th voltage comparator is not equal to low level, institute
The disconnection of third bridge is stated, integrated high-tension connector is faulty with the third bridge enters step (5)；If described
The output signal of four voltage comparators is equal to low level, return to step (1)；
(5) electronic control unit generates interlocking and disconnects information, and sends high pressure power-off to power battery management system BMS and refer to
It enables.
After above-mentioned technique effect, the invention has effective effect that：
Voltage detecting circuit voltage comparator output detection into voltage comparator circuit in high voltage interlock circuit of the present invention
Voltage signal；Generating circuit from reference voltage voltage comparator output reference voltage signal into pressure comparator circuit；Voltage compares
Detectable voltage signals are compared by device with reference voltage signal, generate two level digital switching signals, and input to automatically controlled list
Member；Electronic control unit analyzes and determines high-voltage interlocking circuit by being carried out to the two level digital switching signals that voltage comparator generates
Integrality, and then judge the integrality of high voltage loop of electric automobile, it is repair and the troubleshooting of high voltage loop of electric automobile
Reference is provided.
Description of the drawings
Fig. 1 is the structure diagram of electric automobile high-voltage interlocking loop of the present invention；
Fig. 2 is the flow chart for the breaking localization method of electric automobile high-voltage interlocking that the embodiment of the present invention one provides；
Fig. 3 is the circuit diagram of the voltage detecting circuit in high-voltage interlocking circuit provided by Embodiment 2 of the present invention；
Fig. 4 is the circuit diagram of the generating circuit from reference voltage in high-voltage interlocking circuit provided by Embodiment 2 of the present invention；
Fig. 5 is the circuit diagram of the voltage comparator circuit in high-voltage interlocking circuit provided by Embodiment 2 of the present invention；
Fig. 6 is the flow chart based on specific high-voltage interlocking open circuit localization method provided by Embodiment 2 of the present invention；
In figure：Vcc- low-tension supplies, the first bridges of JP1-, the second bridges of JP2-, JP3- third bridges, JP4-
Four bridges, R1- first resistors, R2- second resistances, R3- 3rd resistors, the 4th resistance of R4-, the 5th resistance of R5-, R6- the 6th
Resistance, the 7th resistance of R7-, ECU- electronic control unit, the first capacitances of C1-, the second capacitances of C2-, C3- third capacitances, the 4th electricity of C4-
Hold, the 5th capacitances of C5-, the 6th capacitances of C6-, the first zener diodes of DZ1-, the second zener diodes of DZ2-, U1- first voltages
Comparator, U2- second voltage comparators, U3- tertiary voltage comparators, the 4th voltage comparators of U4-, the output detections of V1- first
Voltage, the output detection voltages of V2- second, the first output reference voltages of Vref1-, the second output reference voltages of Vref2-, Vo1- the
The output signal of one voltage comparator, the output signal of Vo2- second voltage comparators, the output of Vo3- tertiary voltage comparators
Signal, the output signal of the 4th voltage comparators of Vo4-.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment one：
As shown in Figure 1, a kind of electric automobile high-voltage interlocking loop, which is independently of electric automobile high-voltage
Low pressure electrical connection circuit except circuit, including voltage detecting circuit, generating circuit from reference voltage, voltage comparator circuit and electricity
Control unit ECU；The detection voltage of voltage detecting circuit and the reference voltage of generating circuit from reference voltage are as voltage comparator electricity
The input signal of voltage comparator in road, the input signal of the output signal of voltage comparator as electronic control unit ECU.
Fig. 2 shows the high-voltage interlocking open circuit of the electric automobile high-voltage interlocking loop of the offer of the above embodiment of the present invention one is fixed
The flow chart of position method, specific steps are as follows described：
In step S101, the voltage detecting circuit in the high-voltage interlocking circuit voltage comparator into voltage comparator circuit is defeated
Go out detectable voltage signals；
In step s 102, the generating circuit from reference voltage in high-voltage interlocking circuit voltage into voltage comparator circuit compares
Device output reference voltage signal；
In step s 103, the voltage comparator in high-voltage interlocking circuit carries out detectable voltage signals and reference voltage signal
Compare, generates two level digital switching signals, and be input to the ports I/O of electronic control unit；
In step S104, electronic control unit ECU is carried out by the two level digital switching signals generated to voltage comparator
The integrality for analyzing and determining high-voltage interlocking circuit orients the high-tension connector of failure, generates failure code, and to power
Electrically operated instruction under battery management system BMS is sent.
Power battery management system BMS receives electrically operated, disconnection under execution after the lower electricity that electronic control unit ECU is sent instructs
Positive contactor and cathode contact device.
Wherein：High-tension connector collection in bridge and high voltage loop of electric automobile in electric automobile high-voltage interlocking loop
At together, therefore the integrality of high voltage loop of electric automobile can be judged by the integrality in high-voltage interlocking circuit, for electricity
The repair of electrical automobile high tension loop and troubleshooting provide reference.
Embodiment two：
It is advanced optimized on basis based on above-described embodiment one, mainly for four high-tension connectors in electric vehicle
Carry out detection and localization.
As shown in figure 3, voltage detecting circuit includes the first order voltage detecting circuit being connected in parallel and the inspection of the second step voltage
The equal low-tension supply Vcc electrical connections in one end of slowdown monitoring circuit, first order voltage detecting circuit and second level voltage detecting circuit, the other end
It is grounded.
Voltage detecting circuit includes the first order voltage detecting circuit being connected in parallel and second level voltage detecting circuit, and first
One end of step voltage detection circuit and second level voltage detecting circuit is electrically connected with low-tension supply, and the other end is grounded；
First order voltage detecting circuit includes concatenated first detection unit and second detection unit, first detection unit packet
The the first bridge JP1 and first resistor R1 being connected in series with is included, second detection unit includes the second bridge JP2 being connected in series with
With second resistance R2；High pressure corresponding with high voltage loop of electric automobile connects respectively by first bridge JP1, the second bridge JP2
It is disconnected prior to high-tension connector when connecing device to integrate, and disconnecting, conducting wire can be interpreted as by bridge is popular, bridge is disconnected
When opening, corresponding high-tension connector is loosened or will be loosened, and is interpreted as high-tension connector failure, high tension loop has disconnected
The risk on road.
Second level voltage detecting circuit includes concatenated third detection unit and the 4th detection unit, third detection unit packet
The third bridge JP3 and 3rd resistor R3 being connected in series with is included, the 4th detection unit includes the 4th bridge JP4 being connected in series with
With the 4th resistance R4；High pressure corresponding with high voltage loop of electric automobile connects respectively by third bridge JP3, the 4th bridge JP4
It is disconnected prior to high-tension connector when connecing device to integrate, and disconnecting, conducting wire can be interpreted as by bridge is popular, bridge is disconnected
When opening, corresponding high-tension connector is loosened or will be loosened, and is interpreted as high-tension connector failure, high tension loop has disconnected
The risk on road.
It is electrically operated under carrying out high tension loop as long as risky presence, further improve maintenance dynamics.
The first bridge JP1 and first resistor R1 is connected in series in first order voltage detecting circuit, concatenated first bridge joint
Device JP1 and first resistor R1 is in parallel with the first capacitance C1；Second bridge JP2 and first resistor R1 is connected in series with, the second bridge
It meets device JP2 and second resistance R2 to be connected in series with, concatenated second bridge JP2 and second resistance R2 and the second capacitance C2 phases are simultaneously
Connection；
Third bridge JP3 and 3rd resistor R3 is connected in series in the voltage detecting circuit of the second level, concatenated third bridge joint
Device JP3 and 3rd resistor R3 is in parallel with third capacitance C3；4th bridge JP4 and 3rd resistor R3 is connected in series with, the 4th bridge
It meets device JP4 and the 4th resistance R4 to be connected in series with, concatenated 4th bridge JP4 and the 4th resistance R4 and the 4th capacitance C4 phases are simultaneously
Connection.
Wherein first resistor R1, second resistance R2, the resistance value of 3rd resistor R3 and the 4th resistance R4 are identical.
The detection voltage of voltage detecting circuit includes that the first output detects the output detection voltage V2 of voltage V1 and second,
In, the voltage between first resistor R1 and the second bridge JP2 between tie point and earth point is that the first output detects voltage V1；The
Voltage between three resistance R3 and the 4th bridge JP4 between tie point and earth point is that the second output detects voltage V2.
As shown in figure 4, generating circuit from reference voltage one end is electrically connected with low-tension supply Vcc, other end ground connection；
Generating circuit from reference voltage includes the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7 being sequentially connected in series,
6th resistance R6 and the 7th resistance R7 are connected in parallel to the first zener diode DZ1 and the second zener diode DZ2 respectively.With reference to
The reference voltage of voltage generation circuit includes the first output reference voltage Vref1 and the second output reference voltage Vref2；Wherein
Voltage between five resistance R5 and the 6th resistance R6 between tie point and earth point is the first output reference voltage Vref1；6th electricity
It is the second output reference voltage Vref2 to hinder the voltage between R6 and the 7th resistance R7 between tie point and earth point, in order to simplify meter
Calculating comparison program keeps the resistance value of the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7 identical.
As shown in figure 5, voltage comparator circuit includes four voltage comparators；The wherein same phase of first voltage comparator U1
Input terminal is connect with the inverting input of second voltage comparator U2, and is connected to the first output detection voltage V1；Tertiary voltage
The in-phase input end of comparator U3 is connect with the inverting input of the 4th voltage comparator U4, and is connected to the second output detection electricity
Press V2；The inverting input of first voltage comparator U1 is connect with the inverting input of tertiary voltage comparator U3, and is connected to
First output reference voltage Vref1, while by the 5th capacitance C5 ground connection；The in-phase input end of second voltage comparator U2 and
The in-phase input end of four voltage comparator U4 connects, and is connected to the second output reference voltage Vref2, while passing through the 6th capacitance
C6 is grounded；First voltage comparator U1, second voltage comparator U2, tertiary voltage comparator U3 and the 4th voltage comparator U4
Output end is electrically connected with the ports I/O with electronic control unit ECU.
Fig. 6 shows the high-voltage interlocking for the specific electric automobile high-voltage interlocking loop that the above embodiment of the present invention two provides
The flow chart of breaking localization method, specific steps are as follows described：
In step s 201, electronic control unit ECU detects the output signal Vo1 of first voltage comparator, and judges the first electricity
Press whether the output signal Vo1 of comparator U1 is low level；If the output signal Vo1 of first voltage comparator U1 is not equal to low
Level then shows that the second bridge JP2 is disconnected, and the high-tension connector integrated with the second bridge JP2 is faulty, enters step
S205；If the output signal for stating first voltage comparator U1 is equal to low level, S202 is entered step；
In step S202, the output signal Vo2 of electronic control unit ECU detection second voltage comparators U2, and judge second
Whether the output signal Vo2 of voltage comparator U2 is low level；If the output signal Vo2 of second voltage comparator U2 is not equal to
Low level, then the first bridge JP1 disconnections, the high-tension connector integrated with the first bridge JP1 is faulty, enters step
S205；If the output signal Vo2 of second voltage comparator U2 is equal to low level, S203 is entered step；
In step S203, the output signal Vo3 of electronic control unit ECU detection tertiary voltage comparators U3, and judge third
Whether the output signal Vo3 of voltage comparator U3 is low level；If the output signal Vo3 of tertiary voltage comparator U3 is not equal to
Low level, then the 4th bridge JP4 disconnections, the high-tension connector integrated with the 4th bridge JP4 is faulty, enters step
S205；If the output signal Vo3 of tertiary voltage comparator U3 is equal to low level, S204 is entered step；
In step S204, electronic control unit ECU detects the output signal Vo4 of the 4th voltage comparator U4, and judges the 4th
Whether the output signal Vo4 of voltage comparator U4 is low level；If the output signal Vo4 of the 4th voltage comparator U4 is not equal to
Low level, then third bridge JP3 disconnections, integrated high-tension connector is faulty with third bridge JP3 enters step S205；
If the output signal Vo4 of the 4th voltage comparator U4 is equal to low level, return to step S201；
In step S205, electronic control unit ECU generates interlocking and disconnects information, and is sent to power battery management system BMS
High pressure cut-offing instruction.
Wherein, above-mentioned the carried electronic control unit ECU being previously mentioned is electric automobile whole electronic control unit, can also be independent
An electronic control unit ECU, but electronic control unit ECU need to be electrically connected with electric automobile whole electronic control unit realize data sharing.
In above-described embodiment two, in order to simplify calculation procedure, first resistor R1, second resistance R2,3rd resistor R3 and
The resistance value of 4th resistance R4 is identical, and the resistance value of the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7 are identical.Therefore the first output
Reference voltage Vref 1 is equal to 2/3 low-tension supply Vcc, the second output reference voltage Vref2 and is equal to 1/3 low-tension supply Vcc, mainly
It is to be equal to 1/2 low-tension supply to detect voltage V2 equal to the second output with the first output detection voltage V1 when normal work
Vcc is compared, and can adjust the resistance value of the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7 in fact, as long as making first defeated
Go out 1 to 2/3 low-tension supply Vcc high of reference voltage Vref, while ensuring the second output reference voltage Vref2 than 1/3 low-tension supply
Vcc is low.
No matter first resistor R1, second resistance R2, the resistance value of 3rd resistor R3 and the 4th resistance R4 are identical or different, and the 5th
The resistance value of resistance R5, the 6th resistance R6 and the 7th resistance R7 are identical or differ；High-voltage interlocking open circuit localization method is practical original
It manages constant, it is only necessary to derive corresponding first output detection voltage V1, the second output detection voltage V2, the according to above-mentioned implementation
One output reference voltage Vref1 and the second output reference voltage Vref2 values.
Voltage detecting circuit is not solely restricted to including first order voltage detecting circuit and the inspection of the second step voltage in the present invention
Slowdown monitoring circuit can increase and decrease the series of voltage detecting circuit, the quantity of required voltage comparator at the same time accordingly be derived, upper
On the basis of stating embodiment, high-voltage interlocking open circuit localization method of the those skilled in the art based on the present invention develops out a variety of implementations
Mode, it is numerous to list herein.
In conclusion the foregoing is merely two embodiments of the present invention, it is not intended to limit the invention, it is all at this
All any modification, equivalent and improvement etc., should be included in the protection model of the present invention made by within the spirit and principle of invention
Within enclosing.
Claims (10)
1. a kind of electric automobile high-voltage interlocking loop, which is characterized in that the high-voltage interlocking circuit includes voltage detecting circuit, ginseng
Examine voltage generation circuit, voltage comparator circuit and electronic control unit；
The detection voltage of the voltage detecting circuit and the reference voltage of the generating circuit from reference voltage are that the voltage compares
The output signal of the input signal of voltage comparator in device circuit, the voltage comparator is believed as the input of the electronic control unit
Number.
2. electric automobile high-voltage interlocking loop according to claim 1, which is characterized in that the voltage detecting circuit includes
The first order voltage detecting circuit and second level voltage detecting circuit being connected in parallel, the first order voltage detecting circuit and described
One end of second level voltage detecting circuit is electrically connected with low-tension supply, and the other end is grounded；
The first order voltage detecting circuit includes concatenated first detection unit and second detection unit, and first detection is single
Member includes the first bridge being connected in series with and first resistor, the second detection unit include the second bridge being connected in series with
With second resistance；High pressure corresponding with high voltage loop of electric automobile connects respectively for first bridge, second bridge
It is disconnected prior to the high-tension connector when connecing device to integrate, and disconnecting；
The second level voltage detecting circuit includes concatenated third detection unit and the 4th detection unit, and the third detection is single
Member includes the third bridge being connected in series with and 3rd resistor, the 4th detection unit include the 4th bridge being connected in series with
With the 4th resistance；High pressure corresponding with high voltage loop of electric automobile connects respectively for the third bridge, the 4th bridge
It is disconnected prior to the high-tension connector when connecing device to integrate, and disconnecting.
3. electric automobile high-voltage interlocking loop according to claim 2, which is characterized in that the institute of the voltage detecting circuit
It includes that the first output detects voltage and the second output detection voltage to state detection voltage；
The first output detection voltage is the tie point and earth point of the first detection unit and the second detection unit
Between voltage；
The second output detection voltage is the tie point and earth point of the third detection unit and the 4th detection unit
Between voltage.
4. electric automobile high-voltage interlocking loop according to claim 3, which is characterized in that
In the first order voltage detecting circuit, concatenated first bridge and the first resistor and the first capacitance are mutually simultaneously
Connection, concatenated second bridge is in parallel with the second resistance and the second capacitance, the first detection unit it is described
Second bridge of first resistor and the second detection unit is connected in series with；
In the second level voltage detecting circuit, the concatenated third bridge and the 3rd resistor and third capacitance are mutually simultaneously
Connection, concatenated 4th bridge is in parallel with the 4th resistance with the 4th capacitance, the third detection unit it is described
The 4th bridge of 3rd resistor and the 4th detection unit is connected in series with.
5. electric automobile high-voltage interlocking loop according to claim 4, which is characterized in that the first resistor, described
Two resistance, the 3rd resistor are identical with the resistance value of the 4th resistance.
6. electric automobile high-voltage interlocking loop according to claim 5, which is characterized in that the generating circuit from reference voltage
One end is electrically connected with low-tension supply, other end ground connection；
The generating circuit from reference voltage includes the 5th resistance, the 6th resistance and the 7th resistance being sequentially connected in series, and described
Six resistor coupled in parallel are connected with the first zener diode, and the 7th resistor coupled in parallel is connected with the second zener diode, and described first
Zener diode is connected with second zener diode.
7. electric automobile high-voltage interlocking loop according to claim 6, which is characterized in that the generating circuit from reference voltage
The reference voltage include the first output reference voltage and the second output reference voltage；
Electricity of first output reference voltage between the 5th resistance and the 6th resistance between tie point and earth point
Pressure；
Electricity of second output reference voltage between the 6th resistance and the 7th resistance between tie point and earth point
Pressure；
5th resistance, the 6th resistance are identical with the resistance value of the 7th resistance.
8. electric automobile high-voltage interlocking loop according to claim 7, which is characterized in that the voltage comparator circuit packet
Include four voltage comparators；
The in-phase input end of first voltage comparator is connect with the inverting input of second voltage comparator, and is connected to described
One output detection voltage；The in-phase input end of tertiary voltage comparator is connect with the inverting input of the 4th voltage comparator, and
It is connected to the second output detection voltage；The inverting input of the first voltage comparator and the tertiary voltage comparator
Inverting input connection, and be connected to first output reference voltage, while passing through the 5th capacity earth；Second electricity
The in-phase input end of pressure comparator is connect with the in-phase input end of the 4th voltage comparator, and is connected to second output
Reference voltage, while passing through the 6th capacity earth；
The first voltage comparator, the second voltage comparator, the tertiary voltage comparator and the 4th voltage ratio
It is electrically connected with the ports I/O of the electronic control unit compared with the output end of device.
9. a kind of high-voltage interlocking open circuit localization method based on electric automobile high-voltage interlocking loop described in claim 1, special
Sign is that the method includes following step：
(1) voltage detecting circuit in the high-voltage interlocking circuit is to voltage comparator described in the voltage comparator circuit
Export detectable voltage signals；
(2) generating circuit from reference voltage in the high-voltage interlocking circuit is to voltage ratio described in the voltage comparator circuit
Compared with device output reference voltage signal；
(3) detectable voltage signals are compared by the voltage comparator in the high-voltage interlocking circuit with reference voltage signal,
Two level digital switching signals are generated, and are input to the ports I/O of the electronic control unit；
(4) electronic control unit is sentenced by carrying out analysis to the two level digitals switching signal that the voltage comparator generates
Broken height presses the integrality of interlocking loop, orients the high-tension connector of failure, generates failure code, and to power battery pipe
Electrically operated instruction under reason system BMS is sent.
10. a kind of high-voltage interlocking open circuit localization method based on electric automobile high-voltage interlocking loop according to any one of claims 8, special
Sign is that the method includes following step：
(1) electronic control unit detects the output signal of the first voltage comparator, and judges the first voltage comparator
Output signal whether be low level；If the output signal of the first voltage comparator is not equal to low level, show institute
The disconnection of the second bridge is stated, the high-tension connector integrated with second bridge is faulty, and enters step (5)；If institute
The output signal for stating first voltage comparator is equal to low level, then enters step (2)；
(2) electronic control unit detects the output signal of the second voltage comparator, and judges the second voltage comparator
Output signal whether be low level；If the output signal of the second voltage comparator is not equal to low level, described the
One bridge disconnects, and the high-tension connector integrated with first bridge is faulty, enters step (5)；If described second
The output signal of voltage comparator is equal to low level, then enters step (3)；
(3) electronic control unit detects the output signal of the tertiary voltage comparator, and judges the tertiary voltage comparator
Output signal whether be low level；If the output signal of the tertiary voltage comparator is not equal to low level, described the
Four bridges disconnect, and the high-tension connector integrated with the 4th bridge is faulty, enters step (5)；If the third
The output signal of voltage comparator is equal to low level, then enters step (4)；
(4) electronic control unit detects the output signal of the 4th voltage comparator, and judges the 4th voltage comparator
Output signal whether be low level；If the output signal of the 4th voltage comparator is not equal to low level, described the
Three bridges disconnect, and integrated high-tension connector is faulty with the third bridge enters step (5)；If the 4th electricity
The output signal of comparator is pressed to be equal to low level, return to step (1)；
(5) electronic control unit generates interlocking and disconnects information, and sends high pressure cut-offing instruction to power battery management system BMS.
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| CN110014839A (en) * | 2019-04-09 | 2019-07-16 | 山东交通职业学院 | A kind of electric automobile high-voltage interlock detection circuit |
| CN111796213A (en) * | 2020-07-10 | 2020-10-20 | 的卢技术有限公司 | Detection circuit and method for electrical loop integrity and breakpoint positioning |
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| CN114030383A (en) * | 2021-10-15 | 2022-02-11 | 智新控制系统有限公司 | High-voltage interlocking detection system and method |
| CN114312318A (en) * | 2021-01-30 | 2022-04-12 | 华为数字能源技术有限公司 | High-voltage interlocking system, electric drive system, power assembly and electric vehicle |
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