CN106646216A - Device and method for diagnosing state of high-voltage relay of new energy automobile - Google Patents
Device and method for diagnosing state of high-voltage relay of new energy automobile Download PDFInfo
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- CN106646216A CN106646216A CN201710045885.0A CN201710045885A CN106646216A CN 106646216 A CN106646216 A CN 106646216A CN 201710045885 A CN201710045885 A CN 201710045885A CN 106646216 A CN106646216 A CN 106646216A
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- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
Abstract
The invention discloses a device and method for diagnosing the state of a high-voltage relay of a new energy automobile. The device comprises a first controller, a second controller, a relay driving module, the high-voltage relay, a relay coil voltage collecting module, a high-voltage output voltage collecting module, a first power supply module and an insulating power supply module, wherein the relay coil voltage collecting module is used for detecting the voltage of a coil of the high-voltage relay; the high-voltage output voltage collecting module is used for detecting the voltages at the two ends of a switch of the high-voltage relay; the first controller and the second controller are respectively in signaling connection with a CAN bus; and the first controller is used for judging the faults of the relay driving module and the high-voltage relay. The device for diagnosing the state of the high-voltage relay of the new energy automobile, disclosed by the invention, has the functions of low-voltage driving output feedback and high-voltage output detection; the high-voltage power distribution and the function safety are guaranteed; and the service life of a general positive relay is prolonged.
Description
Technical field
The present invention relates to a kind of method for diagnosing faults of new-energy automobile, more particularly to a kind of high pressure of new-energy automobile after
Electrical appliance state diagnostic device and method.
Background technology
At present new forms of energy high-tension distribution box controller driving load is high-voltage relay, load-relay whether normal work
It is related to the high voltage power distribution and functional safety of car load.High-tension distribution box controller low-voltage driving output at present is fed back without failure,
High voltage output does not detect feedback；When the output of high-tension distribution box controller low-voltage driving is effective, high-voltage relay coil is driven,
The action of high-voltage relay contact, exports high pressure.When high-tension distribution box controller low-voltage driving output short-circuit or open circuit when, high pressure after
Electrical equipment cisco unity malfunction, failure is not fed back；When high-voltage relay coil working, but high-voltage contact are not closed, high pressure is not
Can export, failure can not judge；When high-voltage relay contact adhesion, journey is not broken through in advance in high-power high voltage load, affects high
Pressure always bears relay service life, and High voltage output safety.
The high-tension distribution box inside of existing new-energy automobile is without controller, only relay load, the drive of relay
Dynamic by outside entire car controller output control, controller output driving great majority adopt power drive chip, and driving low pressure is central
Terminal box relay, then by central junction box relay driving high-voltage relay, there is no relay fault detection capability, i.e., not
High-voltage relay short circuit, open circuit can be detected, without open circuit detection and High voltage output detection function.
For this purpose, how the built-in controller driving load of the high-tension distribution box of effective detection new-energy automobile, i.e. high pressure after
Electrical equipment is those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the present invention to provide the high-voltage relay state diagnostic apparatus and method of a kind of new-energy automobile, it has low
Pressure drives output feedback and High voltage output detection function, it is ensured that high voltage power distribution and functional safety, and extending total positive relay makes
Use the life-span.
The present invention solves technical problem and adopts the following technical scheme that：A kind of high-voltage relay condition diagnosing of new-energy automobile
Device, it includes the first controller, second controller, relay driving module, high-voltage relay, relay coil voltage collection
Module, High voltage output voltage acquisition module, the first power module and insulating power supply module；
First power module is used to provide electric energy to first controller and insulating power supply module；
First controller signals are connected to the relay driving module, for transmission opening or shutdown signal extremely
The relay driving module；
The relay driving module circuit is connected to the high-voltage relay, for beating according to first controller
On or off closes signal, controls the high-voltage relay and opens or close；
The relay coil voltage acquisition module is used for the voltage of the coil for detecting the high-voltage relay, and is adopted
The voltage signal of collection is transferred to first controller；
The High voltage output voltage acquisition module is used for the voltage at the two ends of the switch for detecting the high-voltage relay, and will
The voltage signal transmission of its collection refers to first controller and second controller；
First controller and second controller are believed respectively by the first CAN and the second CAN
Number it is connected to CAN；
Voltage signal and High voltage output electricity that first controller is detected according to the relay coil voltage acquisition module
The voltage signal that pressure acquisition module is gathered, judges the failure of relay driving module and high-voltage relay.
Optionally, first controller and second controller are the single-chip microcomputers of model MC9S12G48.
Optionally, the high-voltage relay includes high-voltage relay J1 and high-voltage relay J2；
The relay driving module includes chip U7, and the 11st pin of the chip U7 is connected to+5V power supplys, and leads to
The electric capacity C12 and electric capacity C34 ground connection of parallel connection is crossed, the 3rd pin of the chip U7 is connected to the 21st pipe of first controller
Pin, the 5th pin of the chip U7 is connected to the 22nd pin of first controller；The 2nd pin connection of the chip U7
In the 63rd pin of first controller, and it is grounded by resistance R43；6th pin of the chip U7 is connected to described
62nd pin of one controller, and be grounded by resistance R44；The 4th pin ground connection of the chip U7；The 1st of the chip U7
Pin, the 7th pin, the 8th pin and the 14th pin are all connected to VBR power supplys, the 12nd pin and the 13rd pin of the chip U7
One end of the coil of the high-voltage relay J1 is connected to, and is grounded by electric capacity C36；The coil of the high-voltage relay J1
The other end is grounded；And the 9th pin and the 10th pin of the chip U7 is all connected to the coil of the high-voltage relay J2
One end, and be grounded by electric capacity C40, the other end ground connection of the high-voltage relay J2；The coil of the high-voltage relay J1
One end is connected to VBR power supplys by resistance R34, and is connected to the negative pole of diode D8, the plus earth of the diode D8；
One end of the coil of the high-voltage relay J2 is connected to VBR power supplys by resistance R35, and is connected to the negative of diode D1
Pole, the plus earth of the diode D1.
Optionally, the relay coil voltage acquisition module include electric capacity C18, electric capacity C19, resistance R27, resistance R25,
Electric capacity C20, electric capacity C21, resistance R28 and resistance R29；
One end of the coil of the high-voltage relay J1 is grounded by electric capacity C19, and is connected to described by resistance R25
33rd pin of one controller, the 33rd pin of first controller electric capacity C18 in parallel and resistance R27 ground connection；Institute
The one end for stating the coil of high-voltage relay J2 is grounded by electric capacity C21, and is connected to first controller by resistance R28
34th pin, the 34th pin of first controller electric capacity C20 in parallel and resistance R29 ground connection.
Optionally, the High voltage output voltage acquisition module includes resistance R1, resistance R2, resistance R3, resistance R4, resistance
R8, electric capacity C3, diode D1, resistance R10, resistance R11, resistance R12, resistance R13, electric capacity C11, resistance R14, diode D3,
Resistance R19, resistance R20, resistance R21, resistance R22, electric capacity C14, resistance R23 and diode D5；
One end of the switch of the high-voltage relay J1 and high-voltage relay J2 is by resistance R1, the resistance of series connection
R2, resistance R3 and resistance R4 are connected to the 33rd pin of the second controller, and the 33rd pin of the second controller
It is grounded by electric capacity C3, meanwhile, one end of the resistance R3 and resistance R4 connections is grounded by resistance R8, the diode D1's
Positive pole is connected to one end of the resistance R3 and resistance R4 connections, and the negative pole of the diode D1 is connected to+5V power supplys；
The other end of the switch of the high-voltage relay J1 is by the resistance R10 of series connection, resistance R11, resistance R12 and resistance
R13 is connected to the 34th pin of the second controller, and the 34th pin of the second controller is connect by electric capacity C11
Ground, meanwhile, one end of the resistance R12 and resistance R13 connections is grounded by resistance R14, the positive pole connection of the diode D3
In one end that the resistance R12 and resistance R13 connects, the negative pole of the diode D3 is connected to+5V power supplys；
The other end of the switch of the high-voltage relay J2 is by the resistance R19 of series connection, resistance R20, resistance R21 and resistance
R22 is connected to the 35th pin of the second controller, and the 35th pin of the second controller is connect by electric capacity C14
Ground, meanwhile, one end of the resistance R21 and resistance R22 connections is grounded by resistance R23, the positive pole connection of the diode D5
In one end that the resistance R21 and resistance R22 connects, the negative pole of the diode D5 is connected to+5V power supplys.
Optionally, first CAN includes isolation level conversion chip, and the isolation level conversion chip is
The chip of model PCA82C50, the 1st pin of the isolation level conversion chip is connected to the 61st of first controller
Pin, the 4th pin of the isolation level conversion chip is connected to the 60th pin of first controller；The isolation level
The 2nd pin ground connection of conversion chip, the 3rd pin of the isolation level conversion chip is connected to+5V power supplys, and by electric capacity
C15 is grounded；8th pin of the isolation level conversion chip is grounded by resistance R26, and the of the isolation level conversion chip
6 pins and the 7th pin are connected to respectively the CAN_L and CAN_H of CAN, the CAN_H and CAN_L by common mode choke
Between be in series with electric capacity C13 and electric capacity C17, one end that the electric capacity C13 and electric capacity C17 are connected with each other ground connection；The CAN_H and
Resistance R18 and resistance R19 is in series between CAN_L, and one end of the resistance R18 and resistance R19 connections passes through electric capacity C16
Ground connection；Two Transient Voltage Suppressors are in series between the CAN_H and CAN_L.
Optionally, second CAN includes CAN driving chip U1, the 1st pipe of the CAN driving chips U1
Pin and the 8th pin are all connected to+5V power supplys, and respectively by electric capacity C4 and C5 ground connection；4th pipe of the CAN driving chips U1
Pin and the 5th pin are grounded, and the 2nd pin of the CAN driving chips U1 is connected to the 60th pin of the second controller, described
3rd pin of CAN driving chip U1 is connected to the 61st pin of the second controller；Meanwhile, the CAN driving chips U1's
6th pin and the 7th pin are connected to respectively the CAN_L and CAN_H of CAN, the CAN_H and CAN_ by common mode choke
Electric capacity C2 and electric capacity C10 is also in series between L, one end ground connection that the electric capacity C2 and electric capacity C10 are connected with each other；The CAN_H
Resistance R5 and resistance R9 is in series with and CAN_L between, and one end of the resistance R5 and resistance R9 connections is connect by electric capacity C8
Ground；Two Transient Voltage Suppressors are in series between the CAN_H and CAN_L.
The present invention solves technical problem and also adopts：A kind of high-voltage relay method for diagnosing status of new-energy automobile, utilizes
Above-mentioned device realizes that it includes：
The voltage of S10, the coil of relay coil voltage acquisition module collection high-voltage relay, and the voltage is believed
Number it is transferred to first controller；
S20, the high tension voltage at the two ends of the switch of High voltage output voltage acquisition module collection high-voltage relay, and will
The HV voltage signal is transferred to the second controller；
S30, when the coil voltage exception of high-voltage relay, one end high-tension electricity positive pressure of the switch of the high-voltage relay
Often, when the other end is not exported, it is judged as relay driving module failure；
When the coil voltage of high-voltage relay is normal, one end high tension voltage of the switch of the high-voltage relay is normal, separately
When one end does not export, it is judged as high-voltage relay failure；
When the coil voltage of high-voltage relay is normal, one end high tension voltage of the switch of the high-voltage relay is normal, separately
During the electric voltage exception of one end, it is judged as high-voltage relay contact fault.
The present invention has the advantages that：The high-voltage relay state diagnostic apparatus of the new-energy automobile of the present embodiment,
+ 5V power supplys are produced by the first power module, and the power supply is supplied into the first controller and insulating power supply module；Described first
Controller output signal to relay driving module, to control the action of high-voltage relay J1 and high-voltage relay J2；Relay
Coil voltage acquisition module gathers the coil voltage of high-voltage relay, and voltage analog is input at the first controller
Reason, the information of voltage after process is transmitted to CAN by the first CAN；High voltage output voltage acquisition module is adopted
Collection relay contact-voltage, and the contact voltage is input into second controller, second controller leads to the high pressure information of collection
Cross the second CAN to be transferred in CAN, the first controller judges the driving of high-voltage relay according to bus message
And fault alarm and High voltage output protection.
Description of the drawings
Fig. 1 is the structural representation of the high-voltage relay state diagnostic apparatus of the new-energy automobile of the present invention；
Fig. 2 is the structural representation of first controller of the present invention；
Fig. 3 is the structural representation of the second controller of the present invention；
Fig. 4 is the structural representation of the relay driving module of the present invention；
Fig. 5 is the structural representation of the relay coil voltage acquisition module of the present invention；
Fig. 6 is the structural representation of the High voltage output voltage acquisition module of the present invention；
Fig. 7 is the structural representation of first CAN of the present invention；
Fig. 8 is the structural representation of second CAN of the present invention；
Fig. 9 is the structural representation of the power module of the present invention；
Figure 10 is the structural representation of the insulating power supply module of the present invention；
Specific embodiment
Technical scheme is further elaborated with reference to embodiment and accompanying drawing.
Embodiment 1
A kind of high-voltage relay state diagnostic apparatus of new-energy automobile are present embodiments provided, it has low-voltage driving defeated
Go out feedback and High voltage output detection function, it is ensured that high voltage power distribution, and improve the service life of high-voltage relay；Specifically
Ground, described device includes：First controller, second controller, relay driving module, high-voltage relay, relay coil electricity
Pressure acquisition module, High voltage output voltage acquisition module, the first power module and insulating power supply module；
First power module circuitry is connected to first controller, to provide power supply to first controller,
And, first power module also circuit is connected to the insulating power supply module, to provide electricity to the insulating power supply module
Can, in the present embodiment, the input of first power module is+12V power supplys, and exports+5V power supplys, it is preferable that described first
Power module includes power supply chip U4, it is preferable that the model of the power supply chip U4：TLE4675；The power supply chip U4's
1st pin is connected to the negative pole of diode D6, and the positive pole of the diode D6 is connected to+12V power supplys, with by the diode
D6 realizes the anti-phase short circuit defencive function of power supply chip U4；1st pin of power supply chip electric capacity C22 also in parallel and
Electric capacity C23 is grounded, to be filtered to the power supply being input into by electric capacity C22 and electric capacity C23；3rd pipe of the power supply chip U4
Pin is grounded；4th pin of the power supply chip U4 is grounded by electric capacity C24, and the 5th pin of the power supply chip is for defeated
Go out the power supply of+5V, and the 5th pin of power supply chip electric capacity C27 in parallel and electric capacity C28 ground connection, with by institute
State electric capacity C27 and electric capacity C28 to export+5V power supplys be filtered after, be input into the first controller.
In the present embodiment, when first power module is powered to first controller, the power supply chip U4's
5th pin is connected to the 5th pin and the 6th pin of first controller, and now first controller is model
The single-chip microcomputer of MC9S12G48, first controller signals are connected to the relay driving module, with by the relay
Drive module drives high-voltage relay work.
The second controller is also the single-chip microcomputer of model MC9S12G48.
The relay driving module includes chip U7, the model of the chip U7：BTS723GW, the chip U7's
11st pin is connected to+5V power supplys (VCC), and electric capacity C12 in parallel and electric capacity C34 ground connection, with by the electric capacity
C12 and electric capacity C34 is filtered to the power supply being input into, and the 3rd pin of the chip U7 is connected to the of first controller
21 pins, the 5th pin of the chip U7 is connected to the 22nd pin of first controller；2nd pin of the chip U7
The 63rd pin of first controller is connected to, and is grounded by resistance R43；6th pin of the chip U7 is connected to institute
The 62nd pin of the first controller is stated, and is grounded by resistance R44；Simultaneously the 4th pin of the chip U7 is grounded；The chip
1st pin of U7, the 7th pin, the 8th pin and the 14th pin are all connected to VBR power supplys (such as+24V power supplys), the chip U7
The 12nd pin and the 13rd pin be connected to the high-voltage relay J1 coil one end, and be grounded by electric capacity C36；It is described
The other end ground connection of the coil of high-voltage relay J1；And the 9th pin and the 10th pin of the chip U7 be all connected to it is described
One end of the coil of high-voltage relay J2, and be grounded by electric capacity C40, the other end ground connection of the high-voltage relay J2.
In the present embodiment, the high-voltage relay includes high-voltage relay J1 and high-voltage relay J2, the high-voltage relay
One end of the coil of device J1 is connected to VBR power supplys by resistance R34, and is connected to the negative pole of diode D8, the diode
The plus earth of D8；One end of the coil of the high-voltage relay J2 is connected to VBR power supplys by resistance R35, and is connected to
The negative pole of diode D1, the plus earth of the diode D1.
When the 63rd pin and the 62nd pin of first controller send the switch of high-voltage relay to the chip U7
During signal, the relay driving module can control the opening of the high-voltage relay or closing, that is to say, that described first
During the pin output high level of ground 62 of controller, the 9th pin of the chip U7 and the 10th pin output high level control high pressure
Relay J2 actions, similarly, during the pin output high level of ground 63 of first controller, the 12nd pin of the chip U7
With the output high level control high-voltage relay J1 actions of the 13rd pin；If chip U7 breaks down, the chip U7 can be passed through
The 3rd pin and the 5th pin output signal to first controller, and breakdown judge is carried out by first controller.
The relay coil voltage acquisition module is used to gather the voltage of relay coil, in the present embodiment, it is described after
Electric apparatus coil voltage acquisition module includes electric capacity C18, electric capacity C19, resistance R27 and resistance R25, the line of the high-voltage relay J1
One end of circle is grounded by electric capacity C19, and is connected to the 33rd pin of first controller by resistance R25, meanwhile, it is described
33rd pin of the first controller electric capacity C18 in parallel and resistance R27 ground connection.
And, it is to realize the collection to the coil voltage of high-voltage relay J2, the relay coil voltage acquisition module
Also include electric capacity C20, electric capacity C21, resistance R28 and resistance R29, one end of the coil of the high-voltage relay J2 passes through electric capacity
C21 is grounded, and is connected to the 34th pin of first controller by resistance R28, meanwhile, the 34th of first controller the
Pin electric capacity C20 in parallel and resistance R29 ground connection.
That is, in the present embodiment, by resistance R25 and the partial pressure of resistance R27, realizing the coil of high-voltage relay J1
Voltage measurement, and by resistance R28 and the partial pressure of resistance R29, realize the survey of the voltage of the coil of high-voltage relay J2
Measuring, and the voltage signal for measuring is transferred into first controller carries out AD samplings, and by first controller to institute
State voltage signal to be analyzed and process.
The High voltage output voltage acquisition module be used for detect the on high-tension side output voltage of high-voltage relay, specifically,
The High voltage output voltage acquisition module includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R8, electric capacity C3 and diode
D1；One end (always just) of the switch of the high-voltage relay J1 and high-voltage relay J2 is by resistance R1, the resistance of series connection
R2, resistance R3 and resistance R4 are connected to the 33rd pin of the second controller, and the 33rd pin of the second controller
It is grounded by electric capacity C3, meanwhile, one end of the resistance R3 and resistance R4 connections is grounded by resistance R8, and by diode D1
Connection+5V power supplys；That is, the positive pole of the diode D1 is connected to one end of the resistance R3 and resistance R4 connections, institute
The negative pole for stating diode D1 is connected to+5V power supplys, and so as to pass through diode D1 clamper is carried out.
The other end of the switch of the high-voltage relay J1 is by the resistance R10 of series connection, resistance R11, resistance R12 and resistance
R13 is connected to the 34th pin of the second controller, and the 34th pin of the second controller is connect by electric capacity C11
Ground, meanwhile, one end of the resistance R12 and resistance R13 connections is grounded by resistance R14, and it is electric to connect+5V by diode D3
Source；That is, the positive pole of the diode D3 is connected to one end of the resistance R12 and resistance R13 connections, the diode
The negative pole of D3 is connected to+5V power supplys.
The other end of the switch of the high-voltage relay J2 is by the resistance R19 of series connection, resistance R20, resistance R21 and resistance
R22 is connected to the 35th pin of the second controller, and the 35th pin of the second controller is connect by electric capacity C14
Ground, meanwhile, one end of the resistance R21 and resistance R22 connections is grounded by resistance R23, and it is electric to connect+5V by diode D5
Source；That is, the positive pole of the diode D5 is connected to one end of the resistance R21 and resistance R22 connections, the diode
The negative pole of D5 is connected to+5V power supplys.
That is, one end of the switch of high-voltage relay J1 is by resistance R1, resistance R2, resistance R3 and resistance R8 point
Pressure, and by diode D1 clampers, and after resistance R4 and electric capacity C3 are filtered, high-voltage signal is transferred into second control
Device processed, and similarly, the other end of the other end of the switch of high-voltage relay J1 and the switch of high-voltage relay J2 is also by it
High-voltage signal is transferred to the second controller.
First controller is connected to the second controller by CAN signal, it is highly preferred that first control
Device processed is connected to CAN by the first CAN signal, meanwhile, the second controller passes through the second CAN communication mould
Block signal is connected to CAN, to realize that the signal of first controller and second controller connects.
In the present embodiment, first CAN includes isolation level conversion chip, and the isolation level changes core
Piece is the chip of model PCA82C50, and the 1st pin of the isolation level conversion chip is connected to first controller
61st pin, the 4th pin of the isolation level conversion chip is connected to the 60th pin of first controller；The isolation
The 2nd pin ground connection of electrical level transferring chip, the 3rd pin of the isolation level conversion chip is connected to+5V power supplys, and by electricity
Hold C15 ground connection；8th pin of the isolation level conversion chip is grounded by resistance R26, meanwhile, the isolation level conversion
6th pin of chip and the 7th pin are connected to respectively the CAN_L and CAN_H of CAN, the present embodiment by common mode choke
In, the common mode choke can be the ACT45B-510-2P-TL of TDK companies, and its Main Function is to control common mode disturbances.
In the present embodiment, electric capacity C13 and electric capacity C17 is in series between the CAN_H and CAN_L, and, the electric capacity
One end ground connection that C13 and electric capacity C17 are connected with each other；Meanwhile, resistance R18 and resistance are in series between the CAN_H and CAN_L
R19, and the resistance R18 and resistance R19 connection one end be grounded by electric capacity C16；Go here and there between the CAN_H and CAN_L
It is associated with two Transient Voltage Suppressors；In the present embodiment, the Transient Voltage Suppressor is the core of model MMBZ33VALT1G
Piece, the 3rd pin of the chip of model MMBZ33VALT1G is hanging, and described two Transient Voltage Suppressors are connected with each other
One end ground connection.
Second CAN includes CAN driving chip U1, the model of the chip U1：TJA1050T, it is described
1st pin and the 8th pin of CAN driving chip U1 is all connected to+5V power supplys, and respectively by electric capacity C4 and C5 ground connection；It is described
4th pin of CAN driving chip U1 and the 5th pin are grounded, and the 2nd pin of the CAN driving chips U1 is connected to described second
60th pin of controller, the 3rd pin of the CAN driving chips U1 is connected to the 61st pin of the second controller；Together
When, the 6th pin and the 7th pin of the CAN driving chips U1 are connected to respectively the CAN_L of CAN by common mode choke
And CAN_H, in the present embodiment, the common mode choke can be the ACT45B-510-2P-TL of TDK companies, and its Main Function is
Control common mode disturbances.
In the present embodiment, electric capacity C2 and electric capacity C10 is also in series between the CAN_H and CAN_L, and, the electric capacity
One end ground connection that C2 and electric capacity C10 are connected with each other；Meanwhile, resistance R5 and resistance R9 is in series between the CAN_H and CAN_L,
And one end of the resistance R5 and resistance R9 connections is grounded by electric capacity C8；Two are in series between the CAN_H and CAN_L
Transient Voltage Suppressor；In the present embodiment, the Transient Voltage Suppressor is the chip of model MMBZ33VALT1G, the type
Number for the 3rd pin of the chip of MMBZ33VALT1G it is hanging, and the termination that described two Transient Voltage Suppressors are connected with each other
Ground.
The insulating power supply module to the second controller provides power supply, and the insulating power supply module includes isolation
Power supply chip U5, the model of the chip U5：1st pin and the 2nd pin of DCR010505, the insulating power supply chip U5
+ 5V power supplys are all connected to, the 26th pin of the insulating power supply chip U5 and the 27th pin are grounded；The insulating power supply chip U5
The 13rd pin ground connection, the 14th pin of insulating power supply chip U5 electric capacity C25 and C26 ground connection in parallel, and connecting
In the 49th pin and the 50th pin of the second controller, to be carried to the second controller by the insulating power supply module
Power supply source.
In the present embodiment, by foregoing circuit annexation, the power module also to the relay driving module,
One CAN and the second CAN provide power supply.
The high-voltage relay state diagnostic apparatus of the new-energy automobile of the present embodiment, by the first power module generation+5V
Power supply, and the power supply is supplied into the first controller and insulating power supply module；First controller output signal is to relay
Drive module, to control the action of high-voltage relay J1 and high-voltage relay J2；The collection of relay coil voltage acquisition module is high
The coil voltage of potential relay, and voltage analog is input into the first controller is processed, the information of voltage after process
Transmitted to CAN by the first CAN；High voltage output voltage acquisition module gathers relay contact-voltage, and will
The contact voltage is input to second controller, and second controller transmits the high pressure information for gathering by the second CAN
To in CAN, the first controller is according to bus message (voltage signal and height that relay coil voltage acquisition module is detected
The voltage signal that pressure output voltage acquisition module is gathered), judge driving and fault alarm and the High voltage output of high-voltage relay
Protection.
The present invention new-energy automobile high-voltage relay state diagnostic apparatus can solve the problem that low-voltage driving output feedback and
High voltage output detects function, it is ensured that high voltage power distribution and functional safety, extends total positive relay service life.
Embodiment 2
A kind of high-voltage relay method for diagnosing status of new-energy automobile is present embodiments provided, it adopts the institute of embodiment 1
The high-voltage relay state diagnostic apparatus realization of the new-energy automobile stated, and including：
The voltage of S10, the coil of relay coil voltage acquisition module collection high-voltage relay, and the voltage is believed
Number it is transferred to first controller；
S20, the high tension voltage at the two ends of the switch of High voltage output voltage acquisition module collection high-voltage relay, and will
The HV voltage signal is transferred to the second controller；
S30, when the coil voltage exception of high-voltage relay, one end high-tension electricity positive pressure of the switch of the high-voltage relay
Often, when the other end (output end) is not exported, it is judged as relay driving module failure；
When the coil voltage of high-voltage relay is normal, one end high tension voltage of the switch of the high-voltage relay is normal, separately
When one end (output end) does not export, it is judged as high-voltage relay failure；
When the coil voltage of high-voltage relay is normal, one end high tension voltage of the switch of the high-voltage relay is normal, separately
During one end (output end) electric voltage exception, it is judged as high-voltage relay contact fault；
When the first controller exports cut-off signals to relay driving module, now, the coil voltage of high-voltage relay is just
Often, one end high tension voltage of the switch of the high-voltage relay is normal, when the voltage of the other end (output end) is normal, is judged as height
Potential relay contact adhesion；If going up high-tension electricity again, it is necessary to first exclude the failure.Such as the failure is not excluded for, during upper high-tension electricity,
During the road high-voltage relay attonity, road output high-tension electricity extremely not only affects life safety, also results in total positive high voltage relay
Device is damaged.
The sequencing of above example only for ease of description, does not represent the quality of embodiment.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic；
And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and
Scope.
Claims (8)
1. high-voltage relay state diagnostic apparatus of a kind of new-energy automobile, it is characterised in that including the first controller, the second control
Device processed, relay driving module, high-voltage relay, relay coil voltage acquisition module, High voltage output voltage acquisition module,
One power module and insulating power supply module；
First power module is used to provide electric energy to first controller and insulating power supply module；
First controller signals are connected to the relay driving module, open or shutdown signal is to described for sending
Relay driving module；
The relay driving module circuit is connected to the high-voltage relay, for according to the opening of first controller or
Person's shutdown signal, controls the high-voltage relay and opens or close；
The relay coil voltage acquisition module is used for the voltage of the coil for detecting the high-voltage relay, and is gathered
Voltage signal is transferred to first controller；
The High voltage output voltage acquisition module is used for the voltage at the two ends of the switch for detecting the high-voltage relay, and is adopted
The voltage signal transmission of collection refers to first controller and second controller；
First controller and second controller are connected respectively by the first CAN and the second CAN signal
It is connected to CAN；
The voltage signal and High voltage output voltage that first controller is detected according to the relay coil voltage acquisition module is adopted
The voltage signal that collection module is gathered, judges the failure of relay driving module and high-voltage relay.
2. high-voltage relay state diagnostic apparatus of new-energy automobile according to claim 1, it is characterised in that described
One controller and second controller are the single-chip microcomputers of model MC9S12G48.
3. high-voltage relay state diagnostic apparatus of new-energy automobile according to claim 2, it is characterised in that the height
Potential relay includes high-voltage relay J1 and high-voltage relay J2；
The relay driving module includes chip U7, and the 11st pin of the chip U7 is connected to+5V power supplys, and by simultaneously
The electric capacity C12 and electric capacity C34 ground connection of connection, the 3rd pin of the chip U7 is connected to the 21st pin of first controller, institute
The 5th pin for stating chip U7 is connected to the 22nd pin of first controller；2nd pin of the chip U7 is connected to described
63rd pin of the first controller, and be grounded by resistance R43；6th pin of the chip U7 is connected to first control
62nd pin of device, and be grounded by resistance R44；The 4th pin ground connection of the chip U7；1st pin of the chip U7,
7 pins, the 8th pin and the 14th pin are all connected to VBR power supplys, and the 12nd pin and the 13rd pin of the chip U7 are connected to institute
One end of the coil of high-voltage relay J1 is stated, and is grounded by electric capacity C36；Another termination of the coil of the high-voltage relay J1
Ground；And the 9th pin and the 10th pin of the chip U7 is all connected to one end of the coil of the high-voltage relay J2, and lead to
Cross electric capacity C40 ground connection, the other end ground connection of the high-voltage relay J2；One end of the coil of the high-voltage relay J1 is by electricity
Resistance R34 is connected to VBR power supplys, and is connected to the negative pole of diode D8, the plus earth of the diode D8；The high pressure after
One end of the coil of electrical equipment J2 is connected to VBR power supplys by resistance R35, and is connected to the negative pole of diode D1, two pole
The plus earth of pipe D1.
4. high-voltage relay state diagnostic apparatus of new-energy automobile according to claim 3, it is characterised in that it is described after
Electric apparatus coil voltage acquisition module includes electric capacity C18, electric capacity C19, resistance R27, resistance R25, electric capacity C20, electric capacity C21, resistance
R28 and resistance R29；
One end of the coil of the high-voltage relay J1 is grounded by electric capacity C19, and is connected to first control by resistance R25
33rd pin of device processed, the 33rd pin of first controller electric capacity C18 in parallel and resistance R27 ground connection；The height
One end of the coil of potential relay J2 is grounded by electric capacity C21, and is connected to the 34th of first controller the by resistance R28
Pin, the 34th pin of first controller electric capacity C20 in parallel and resistance R29 ground connection.
5. high-voltage relay state diagnostic apparatus of new-energy automobile according to claim 4, it is characterised in that the height
Pressure output voltage acquisition module includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R8, electric capacity C3, diode D1, resistance
R10, resistance R11, resistance R12, resistance R13, electric capacity C11, resistance R14, diode D3, resistance R19, resistance R20, resistance R21,
Resistance R22, electric capacity C14, resistance R23 and diode D5；
One end of the switch of the high-voltage relay J1 and high-voltage relay J2 is by resistance R1, resistance R2, the electricity of series connection
Resistance R3 and resistance R4 is connected to the 33rd pin of the second controller, and the 33rd pin of the second controller by electricity
Hold C3 ground connection, meanwhile, one end of the resistance R3 and resistance R4 connections is grounded by resistance R8, and the positive pole of the diode D1 connects
One end of the resistance R3 and resistance R4 connections is connected to, the negative pole of the diode D1 is connected to+5V power supplys；
Resistance R10, resistance R11, resistance R12 and resistance R13 that the other end of the switch of the high-voltage relay J1 passes through series connection
The 34th pin of the second controller is connected to, and the 34th pin of the second controller is grounded by electric capacity C11, together
When, one end of the resistance R12 and resistance R13 connections is grounded by resistance R14, described in the positive pole of the diode D3 is connected to
One end of resistance R12 and resistance R13 connections, the negative pole of the diode D3 is connected to+5V power supplys；
Resistance R19, resistance R20, resistance R21 and resistance R22 that the other end of the switch of the high-voltage relay J2 passes through series connection
The 35th pin of the second controller is connected to, and the 35th pin of the second controller is grounded by electric capacity C14, together
When, one end of the resistance R21 and resistance R22 connections is grounded by resistance R23, described in the positive pole of the diode D5 is connected to
One end of resistance R21 and resistance R22 connections, the negative pole of the diode D5 is connected to+5V power supplys.
6. high-voltage relay state diagnostic apparatus of new-energy automobile according to claim 5, it is characterised in that described
One CAN includes isolation level conversion chip, and the isolation level conversion chip is the chip of model PCA82C50,
1st pin of the isolation level conversion chip is connected to the 61st pin of first controller, the isolation level conversion
4th pin of chip is connected to the 60th pin of first controller；2nd pin of the isolation level conversion chip connects
Ground, the 3rd pin of the isolation level conversion chip is connected to+5V power supplys, and is grounded by electric capacity C15；The isolation level
8th pin of conversion chip is grounded by resistance R26, and the 6th pin and the 7th pin of the isolation level conversion chip lead to respectively
CAN_L and CAN_H that common mode choke is connected to CAN are crossed, electric capacity C13 and electricity are in series between the CAN_H and CAN_L
Hold C17, one end ground connection that the electric capacity C13 and electric capacity C17 are connected with each other；Resistance is in series between the CAN_H and CAN_L
R18 and resistance R19, and the resistance R18 and resistance R19 connection one end be grounded by electric capacity C16；The CAN_H and
Two Transient Voltage Suppressors are in series between CAN_L.
7. high-voltage relay state diagnostic apparatus of new-energy automobile according to claim 6, it is characterised in that described
Two CANs include CAN driving chip U1, and the 1st pin and the 8th pin of the CAN driving chips U1 are all connected to+5V
Power supply, and respectively by electric capacity C4 and C5 ground connection；4th pin of the CAN driving chips U1 and the 5th pin are grounded, the CAN
2nd pin of driving chip U1 is connected to the 60th pin of the second controller, the 3rd pin of the CAN driving chip U1
It is connected to the 61st pin of the second controller；Meanwhile, the 6th pin and the 7th pin of the CAN driving chips U1 lead to respectively
Cross CAN_L and CAN_H that common mode choke is connected to CAN, be also in series between the CAN_H and CAN_L electric capacity C2 and
Electric capacity C10, one end ground connection that the electric capacity C2 and electric capacity C10 are connected with each other；Resistance is in series between the CAN_H and CAN_L
R5 and resistance R9, and the resistance R5 and resistance R9 connection one end be grounded by electric capacity C8；The CAN_H and CAN_L it
Between be in series with two Transient Voltage Suppressors.
8. the high-voltage relay method for diagnosing status of a kind of new-energy automobile, it utilizes the device in claim 1-7 to realize, its
It is characterised by, including：
The voltage of S10, the coil of relay coil voltage acquisition module collection high-voltage relay, and the voltage signal is passed
It is handed to first controller；
S20, the high tension voltage at the two ends of the switch of High voltage output voltage acquisition module collection high-voltage relay, and by the height
Piezoelectricity presses signal transmission to the second controller；
S30, when the coil voltage exception of high-voltage relay, one end high tension voltage of the switch of the high-voltage relay is normal, separately
When one end does not export, it is judged as relay driving module failure；
When the coil voltage of high-voltage relay is normal, one end high tension voltage of the switch of the high-voltage relay is normal, the other end
When not exporting, it is judged as high-voltage relay failure；
When the coil voltage of high-voltage relay is normal, one end high tension voltage of the switch of the high-voltage relay is normal, the other end
During electric voltage exception, it is judged as high-voltage relay contact fault.
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| CN110488182A (en) * | 2019-08-16 | 2019-11-22 | 哈尔滨工业大学（深圳） | A kind of method, system, device and the storage medium of relay on-line checking and monitoring |
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| CN110888050B (en) * | 2019-11-12 | 2022-04-22 | 东风汽车有限公司 | Relay adhesion detection device and vehicle |
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