CN108482127B - 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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- CN108482127B CN108482127B CN201810278062.7A CN201810278062A CN108482127B CN 108482127 B CN108482127 B CN 108482127B CN 201810278062 A CN201810278062 A CN 201810278062A CN 108482127 B CN108482127 B CN 108482127B
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- resistance
- voltage comparator
- 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；Voltage comparator will test voltage signal and be compared 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, provides reference for the maintenance 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 technique
High-voltage interlocking circuit is a kind of electric car safe design measure with low-voltage signal monitoring high tension loop integrality,
Its monitoring objective is the high-tension connector for needing manual operation to realize circuit connecting and disconnecting in electric car.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 is loosened or maintenance worker is due to accidentally
Operation causes high-tension connector to loosen, electric under execution system by detecting to high-voltage interlocking signal, to reduce the general of risk generation
Rate.
Currently, the high-voltage interlocking circuit used on electric car generally judges high tension loop by detecting its on-off
Integrality, the high-tension connector for occurring loosening can not be accurately positioned, be unfavorable for the maintenance and failure of high voltage loop of electric automobile
It excludes.
Summary of the invention
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
Maintenance and troubleshooting provide reference.
The inventive concept total as one, another technical problem solved by the invention are to provide a kind of electric car
High-voltage interlocking open circuit localization method.
In order to solve the first technical problem mentioned above, the technical scheme adopted by the invention is that: 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
Surveying unit includes the first bridge being connected in series and first resistor, and the second detection unit includes the second bridge being connected in series
Connect device and second resistance；First bridge, second bridge respectively with height corresponding in high voltage loop of electric automobile
Pressure connector integrates, and disconnects when disconnection prior to the high-tension connector；
The second level voltage detecting circuit includes concatenated third detection unit and the 4th detection unit, the third inspection
Surveying unit includes the third bridge being connected in series and 3rd resistor, and the 4th detection unit includes the 4th bridge being connected in series
Connect device and the 4th resistance；The third bridge, the 4th bridge respectively with height corresponding in high voltage loop of electric automobile
Pressure connector integrates, and disconnects when disconnection prior to the high-tension connector.
Further, the detection voltage of the voltage detecting circuit includes the first output detection 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 capacitor is in parallel, and concatenated second bridge is in parallel with the second resistance and the second capacitor, first inspection
Second bridge of the first resistor and the second detection unit of surveying unit is connected in series；
In the second level voltage detecting circuit, the concatenated third bridge and the 3rd resistor and third capacitor
It is in parallel, concatenated 4th bridge is in parallel with the 4th resistance with the 4th capacitor, the third detection unit
The 4th bridge of the 3rd resistor and the 4th detection unit is connected in series.
Further, the resistance value phase of the first resistor, 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
Reference voltage out；
First output reference voltage is between the 5th resistance and the 6th resistance between tie point and grounding point
Voltage；
Second output reference voltage is between the 6th resistance and the 7th resistance between tie point and grounding 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 non-inverting input terminal of first voltage comparator is connect with the inverting input terminal of second voltage comparator, and is connected to institute
State the first output detection voltage；The non-inverting input terminal of tertiary voltage comparator and the inverting input terminal of the 4th voltage comparator connect
It connects, and is connected to the second output detection voltage；The inverting input terminal of the first voltage comparator and the tertiary voltage
The inverting input terminal of comparator connects, and is connected to first output reference voltage, while passing through the 5th capacity earth；It is described
The non-inverting input terminal of second voltage comparator is connect with the non-inverting input terminal 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 port 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
Breaking localization method is interlocked, the method includes the following steps:
(1) voltage detecting circuit in the high-voltage interlocking circuit is to the ratio of voltage 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 electricity described in the voltage comparator circuit
Press comparator output reference voltage signal；
(3) voltage comparator in the high-voltage interlocking circuit will test voltage signal and be compared with reference voltage signal
Compared with, two level digital switching signals of generation, and it is input to the port 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 judge the integrality in high-voltage interlocking circuit, orients the high-tension connector of failure, generation fault code, and to power electric
Electrically operated instruction under pond management 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 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 technical 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
Device will test voltage signal and be compared 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 carrying 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 maintenance and the troubleshooting of high voltage loop of electric automobile
Reference is provided.
Detailed description of the invention
Fig. 1 is the structural block diagram of electric automobile high-voltage interlocking loop of the present invention；
Fig. 2 is the flow chart that the electric automobile high-voltage that the embodiment of the present invention one provides interlocks breaking localization method；
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 supply, the first bridge of JP1-, the second bridge of JP2-, JP3- third bridge, JP4-
Four bridges, R1- first resistor, R2- second resistance, R3- 3rd resistor, the 4th resistance of R4-, the 5th resistance of R5-, R6- the 6th
Resistance, the 7th resistance of R7-, ECU- electronic control unit, C1- first capacitor, the second capacitor of C2-, C3- third capacitor, the 4th electricity of C4-
Hold, the 5th capacitor of C5-, the 6th capacitor of C6-, the first zener diode of DZ1-, the second zener diode of DZ2-, U1- first voltage
Comparator, U2- second voltage comparator, U3- tertiary voltage comparator, the 4th voltage comparator of U4-, the output detection of V1- first
Voltage, the output detection voltage of V2- second, the first output reference voltage of Vref1-, the second output reference voltage of Vref2-, Vo1- the
The output signal of one voltage comparator, the output signal of Vo2- second voltage comparator, the output of Vo3- tertiary voltage comparator
Signal, the output signal of the 4th voltage comparator of Vo4-.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention 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, 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 high-voltage interlocking circuit voltage comparator into voltage comparator circuit is defeated
Detectable voltage signals out；
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 will test voltage signal and reference voltage signal carries out
Compare, generates two level digital switching signals, and be input to the port 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 fault 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: the high-tension connector collection in the 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 maintenance of electrical automobile high tension loop and troubleshooting provide reference.
Embodiment two:
It is advanced optimized on one basis based on the above embodiment, mainly for four high-tension connectors in electric car
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 connection 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 and second level voltage detecting circuit being connected in parallel, 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 of series connection are included, second detection unit includes the second bridge JP2 being connected in series
With second resistance R2；First bridge JP1, the second bridge JP2 connect with high pressure corresponding in high voltage loop of electric automobile respectively
It is disconnected when connecing device to integrate, and disconnecting prior to high-tension connector, 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 of series connection are included, the 4th detection unit includes the 4th bridge JP4 being connected in series
With the 4th resistance R4；Third bridge JP3, the 4th bridge JP4 connect with high pressure corresponding in high voltage loop of electric automobile respectively
It is disconnected when connecing device to integrate, and disconnecting prior to high-tension connector, 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 and first capacitor C1 is in parallel；Second bridge JP2 and first resistor R1 is connected in series, the second bridge
It meets device JP2 and second resistance R2 to be connected in series, concatenated second bridge JP2 and second resistance R2 and the second capacitor C2 phase 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 capacitor C3；4th bridge JP4 and 3rd resistor R3 is connected in series, the 4th bridge
It meets device JP4 and the 4th resistance R4 to be connected in series, concatenated 4th bridge JP4 and the 4th resistance R4 and the 4th capacitor C4 phase are simultaneously
Connection.
Wherein the resistance value of first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4 are identical.
The detection voltage of voltage detecting circuit includes the first output output detection voltage V2 of detection voltage V1 and second,
In, the voltage between first resistor R1 and the second bridge JP2 between tie point and grounding point is that the first output detects voltage V1；The
Voltage between three resistance R3 and the 4th bridge JP4 between tie point and grounding 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 grounding point is the first output reference voltage Vref1；6th electricity
Hindering the voltage between R6 and the 7th resistance R7 between tie point and grounding point is the second output reference voltage Vref2, 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 terminal of second voltage comparator U2, and is connected to the first output detection voltage V1；Tertiary voltage
The non-inverting input terminal of comparator U3 is connect with the inverting input terminal of the 4th voltage comparator U4, and is connected to the second output detection electricity
Press V2；The inverting input terminal of first voltage comparator U1 is connect with the inverting input terminal of tertiary voltage comparator U3, and is connected to
First output reference voltage Vref1, while being grounded by the 5th capacitor C5；The non-inverting input terminal of second voltage comparator U2 and the
The non-inverting input terminal of four voltage comparator U4 connects, and is connected to the second output reference voltage Vref2, while passing through the 6th capacitor
C6 ground connection；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 port I/O with electronic control unit ECU.
Fig. 6 shows the high-voltage interlocking of the specific electric automobile high-voltage interlocking loop of the offer of the above embodiment of the present invention two
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, electronic control unit ECU detects the output signal Vo2 of second voltage comparator U2, and judges 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 is disconnected, and the high-tension connector integrated with the first bridge JP1 is faulty, is entered step
S205；If the output signal Vo2 of second voltage comparator U2 is equal to low level, S203 is entered step；
In step S203, electronic control unit ECU detects the output signal Vo3 of tertiary voltage comparator U3, and judges 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 is disconnected, and the high-tension connector integrated with the 4th bridge JP4 is faulty, is entered 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 is disconnected, and 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 step S201；
In step S205, electronic control unit ECU generates interlocking and disconnects information, and sends to power battery management system BMS
High pressure cut-offing instruction.
Wherein, above-mentioned the mentioned electronic control unit ECU being previously mentioned is electric automobile whole electronic control unit, is also possible to individually
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 the second output detection voltage V2 with the first output detection voltage V1 when working normally and be equal to 1/2 low-tension supply
Vcc is compared, in fact the resistance value of adjustable 5th resistance R5, the 6th resistance R6 and the 7th resistance R7, as long as making first defeated
1 to 2/3 low-tension supply Vcc high of reference voltage Vref out, 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 not identical；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 value.
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 accordingly be derived at the same time, upper
On the basis of stating embodiment, those skilled in the art develop out a variety of implementations based on high-voltage interlocking open circuit localization method of the invention
Mode, it is numerous to list herein.
In conclusion be not intended to limit the invention the foregoing is merely two embodiments of the invention, it is all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in protection model of the invention within the spirit and principle of invention
Within enclosing.
Claims (2)
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；
The voltage detecting circuit includes the first order voltage detecting circuit and second level voltage detecting circuit being connected in parallel, described
One end of first order voltage detecting circuit and the second level voltage detecting circuit is electrically connected with low-tension supply, and the other end connects
Ground；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 and first resistor, and the second detection unit includes the second bridge being connected in series
With second resistance；First bridge, second bridge connect with high pressure corresponding in high voltage loop of electric automobile respectively
It is disconnected when connecing device to integrate, and disconnecting prior to the high-tension connector；The second level voltage detecting circuit includes series connection
Third detection unit and the 4th detection unit, the third detection unit include be connected in series third bridge and third electricity
Resistance, the 4th detection unit include the 4th bridge and the 4th resistance being connected in series；The third bridge, the described 4th
Bridge is integrated with high-tension connector corresponding in high voltage loop of electric automobile respectively, and prior to the high pressure when disconnection
Connector disconnects；
The detection voltage of the voltage detecting circuit includes the first output detection voltage and the second output detection voltage；It is described
Electricity of the first output detection voltage between the first detection unit and the tie point and grounding point of the second detection unit
Pressure；The second output detection voltage be the third detection unit and the 4th detection unit tie point and grounding point it
Between voltage；
In the first order voltage detecting circuit, concatenated first bridge and the first resistor and first capacitor are mutually simultaneously
Connection, concatenated second bridge is in parallel with the second resistance and the second capacitor, the first detection unit it is described
Second bridge of first resistor and the second detection unit is connected in series；In the second level voltage detecting circuit,
The concatenated third bridge and the 3rd resistor are in parallel with third capacitor, concatenated 4th bridge with it is described
4th resistance is in parallel with the 4th capacitor, the institute of the 3rd resistor of the third detection unit and the 4th detection unit
State the series connection of the 4th bridge；The resistance of the first resistor, the second resistance, the 3rd resistor and the 4th resistance
It is worth identical；
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
Including the 5th resistance, the 6th resistance and the 7th resistance being sequentially connected in series, the 6th resistor coupled in parallel is connected with the first pressure stabilizing
Diode, the 7th resistor coupled in parallel are connected with the second zener diode, first zener diode and second pressure stabilizing
Diode series；
The reference voltage of the generating circuit from reference voltage includes the first output reference voltage and the second output reference voltage；
Voltage of first output reference voltage between the 5th resistance and the 6th resistance between tie point and grounding point；Institute
State voltage of second output reference voltage between the 6th resistance and the 7th resistance between tie point and grounding point；It is described
5th resistance, the 6th resistance are identical with the resistance value of the 7th resistance；
The voltage comparator circuit includes four voltage comparators；The non-inverting input terminal of first voltage comparator and second
The inverting input terminal of voltage comparator connects, and is connected to the first output detection voltage；The same phase of tertiary voltage comparator
Input terminal is connect with the inverting input terminal of the 4th voltage comparator, and is connected to the second output detection voltage；Described first
The inverting input terminal of voltage comparator is connect with the inverting input terminal of the tertiary voltage comparator, and it is defeated to be connected to described first
Reference voltage out, while passing through the 5th capacity earth；The non-inverting input terminal of the second voltage comparator and the 4th voltage
The non-inverting input terminal of comparator connects, and is connected to second output reference voltage, while passing through the 6th capacity earth；It is described
First voltage comparator, the second voltage comparator, the tertiary voltage comparator and the 4th voltage comparator it is defeated
Outlet is electrically connected with the port I/O of the electronic control unit.
2. 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 the following steps:
(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, enter 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 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109324596A (en) * | 2018-09-20 | 2019-02-12 | 合肥巨动力系统有限公司 | A kind of electric machine controller high-voltage interlocking detection circuit and detection method |
| CN109507564A (en) * | 2018-11-14 | 2019-03-22 | 苏州绿控传动科技股份有限公司 | A kind of new energy overall height pressure interlock detection circuit and corresponding detection method |
| CN110014839B (en) * | 2019-04-09 | 2020-12-01 | 山东交通职业学院 | High-voltage interlocking detection circuit for electric automobile |
| CN111796213B (en) * | 2020-07-10 | 2023-05-12 | 的卢技术有限公司 | Detection circuit and method for electrical loop integrity and breakpoint positioning |
| CN112684359B (en) * | 2020-12-03 | 2024-04-02 | 上汽通用汽车有限公司 | Voltage pulse isolation protection device and battery test bed comprising same |
| 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 |
| CN112977068A (en) * | 2021-03-18 | 2021-06-18 | 奇瑞新能源汽车股份有限公司 | High-voltage protection method and device for electric automobile and electric automobile |
| CN114030383B (en) * | 2021-10-15 | 2024-04-05 | 智新控制系统有限公司 | High-voltage interlocking detection system and method |
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| JP3600211B2 (en) * | 2000-02-22 | 2004-12-15 | 三洋電機株式会社 | Power supply leakage detection circuit |
| JP2013190359A (en) * | 2012-03-14 | 2013-09-26 | Toshiba Corp | Status assessment device and auxiliary power supply for vehicle |
| CN104569751B (en) * | 2014-12-23 | 2018-04-03 | 北京新能源汽车股份有限公司 | The apparatus and method that insulating properties detection is carried out to the high pressure ancillary apparatus wire harness of electric automobile |
| CN105403784B (en) * | 2015-11-16 | 2018-06-01 | 安徽江淮汽车集团股份有限公司 | A kind of new-energy automobile high-voltage interlocking detecting system |
| CN106143161A (en) * | 2016-08-24 | 2016-11-23 | 福建省汽车工业集团云度新能源汽车股份有限公司 | A kind of high pressure monitoring device of electric automobile |
| CN106882052B (en) * | 2017-04-13 | 2023-11-14 | 江苏苏缆电缆有限公司 | High-voltage interlocking loop and high-voltage interlocking loop detector |
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