CN106646216B - The high-voltage relay state diagnostic apparatus and method of new-energy automobile - Google Patents
The high-voltage relay state diagnostic apparatus and method of new-energy automobile Download PDFInfo
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- CN106646216B CN106646216B CN201710045885.0A CN201710045885A CN106646216B CN 106646216 B CN106646216 B CN 106646216B CN 201710045885 A CN201710045885 A CN 201710045885A CN 106646216 B CN106646216 B CN 106646216B
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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
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Abstract
The invention discloses the high-voltage relay state diagnostic apparatus and method of a kind of new-energy automobile, described device includes the first controller, second controller, relay driving module, high-voltage relay, relay coil voltage acquisition module, High voltage output voltage acquisition module, the first power module and isolated power supply module；The relay coil voltage acquisition module is used to detect the voltage of the coil of the high-voltage relay；The High voltage output voltage acquisition module is used to detect the voltage at the both ends of the switch of the high-voltage relay；First controller and second controller are connected separately in CAN bus；First controller judges the failure of relay driving module and high-voltage relay.The high-voltage relay state diagnostic apparatus of new-energy automobile of the invention has low-voltage driving output feedback and High voltage output detection function, ensure that high voltage power distribution and functional safety, extends total positive relay service life.
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 technique
The load of new energy high-tension distribution box controller driving at present is high-voltage relay, and whether load-relay works normally
It is related to the high voltage power distribution and functional safety of vehicle.High-tension distribution box controller low-voltage driving exports no failure feedback at present,
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 movement 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
Electric appliance cisco unity malfunction, failure are not fed back；When high-voltage relay coil working, but high-voltage contact is not closed, and high pressure is not
It can export, failure cannot judge；When high-voltage relay contact adhesion, journey is not broken through in high-power high voltage load in advance, influences height
Press total negative relay service life and High voltage output safety.
There is no controller inside the high-tension distribution box of existing new-energy automobile, only relay loads, the drive of relay
Dynamic exported by external entire car controller controls, and most of controller output driving uses power drive chip, driving low pressure center
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 effectively to detect built in the high-tension distribution box of new-energy automobile controller driving load, i.e., high pressure after
Electric appliance is those skilled in the art's technical problem urgently to be resolved.
Summary 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, with low
Pressure driving output feedback and High voltage output detection function, ensure that high voltage power distribution and functional safety, and extending total positive relay makes
Use the service life.
The present invention solves the high-voltage relay condition diagnosing that technical problem adopts the following technical scheme that a kind of new-energy automobile
Device comprising the first controller, second controller, relay driving module, high-voltage relay, relay coil voltage acquisition
Module, High voltage output voltage acquisition module, the first power module and isolated power supply module；
First power module is used to provide electric energy to first controller and isolated power supply module；
First controller signals are connected to the relay driving module, turn on or off signal extremely for sending
The relay driving module；
The relay driving module circuit connection is in the high-voltage relay, for beating according to first controller
On or off closes signal, controls the high-voltage relay and turns on or off；
The relay coil voltage acquisition module is used to detect the voltage of the coil of 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 to detect the voltage at the both ends of the switch of the high-voltage relay, and will
Its voltage signal acquired transmitting refers to first controller and second controller；
First controller and second controller pass through the first CAN communication module and the second CAN communication module letter respectively
Number it is connected to CAN bus；
First controller is according to relay coil voltage acquisition module voltage signal detected and High voltage output electricity
Acquisition module voltage signal collected is pressed, the failure of relay driving module and high-voltage relay is judged.
Optionally, first controller and second controller are the single-chip microcontrollers 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 supply, and leads to
Capacitor C12 and capacitor C34 ground connection in parallel are crossed, the 3rd pin of the chip U7 is connected to the 21st pipe of first controller
5th pin of foot, the chip U7 is connected to the 22nd pin of first controller；The 2nd pin of the chip U7 connects
It is grounded in the 63rd pin of first controller, and by resistance R43；The 6th pin of the chip U7 is connected to described
62nd pin of one controller, and be grounded by resistance R44；The 4th pin of the chip U7 is grounded；The 1st of the chip U7
Pin, the 7th pin, the 8th pin and the 14th pin are all connected to VBR power supply, the 12nd pin and the 13rd pin of the chip U7
It is connected to one end of the coil of the high-voltage relay J1, and is grounded by capacitor C36；The coil of the high-voltage relay J1
Other end ground connection；And the chip U7 the 9th pin and the 10th pin be all connected to the coil of the high-voltage relay J2
One end, and be grounded by capacitor 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 supply by resistance R34, and is connected to the cathode 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 supply 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 capacitor C18, capacitor C19, resistance R27, resistance R25,
Capacitor C20, capacitor C21, resistance R28 and resistance R29；
One end of the coil of the high-voltage relay J1 is grounded by capacitor C19, and is connected to described by resistance R25
33rd pin of the 33rd pin of one controller, first controller passes through capacitor C18 and resistance R27 ground connection in parallel；Institute
The one end for stating the coil of high-voltage relay J2 is grounded by capacitor C21, and is connected to first controller by resistance R28
34th pin of the 34th pin, first controller passes through capacitor C20 and resistance R29 ground connection in parallel.
Optionally, the High voltage output voltage acquisition module includes resistance R1, resistance R2, resistance R3, resistance R4, resistance
R8, capacitor C3, diode D1, resistance R10, resistance R11, resistance R12, resistance R13, capacitor C11, resistance R14, diode D3,
Resistance R19, resistance R20, resistance R21, resistance R22, capacitor C14, resistance R23 and diode D5；
One end of the switch of the high-voltage relay J1 and high-voltage relay J2 passes through concatenated resistance R1, resistance
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 capacitor C3, meanwhile, one end that the resistance R3 is connected with resistance R4 is grounded by resistance R8, the diode D1's
Anode is connected to one end that the resistance R3 is connected with resistance R4, and the cathode of the diode D1 is connected to+5V power supply；
The other end of the switch of the high-voltage relay J1 passes through concatenated resistance R10, 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 capacitor C11
Ground, meanwhile, one end that the resistance R12 is connected with resistance R13 is grounded by resistance R14, the anode connection of the diode D3
Cathode in one end that the resistance R12 is connected with resistance R13, the diode D3 is connected to+5V power supply；
The other end of the switch of the high-voltage relay J2 passes through concatenated resistance R19, 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 capacitor C14
Ground, meanwhile, one end that the resistance R21 is connected with resistance R22 is grounded by resistance R23, the anode connection of the diode D5
Cathode in one end that the resistance R21 is connected with resistance R22, the diode D5 is connected to+5V power supply.
Optionally, first CAN communication module includes isolation level conversion chip, and the isolation level conversion chip is
1st pin of the chip of model PCA82C50, the isolation level conversion chip is connected to the 61st of first controller
4th pin of pin, the isolation level conversion chip is connected to the 60th pin of first controller；The isolation level
2nd pin of conversion chip is grounded, and the 3rd pin of the isolation level conversion chip is connected to+5V power supply, and passes through capacitor
C15 ground connection；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 pass through CAN_L and CAN_H that common mode choke is connected to CAN bus, the CAN_H and CAN_L respectively
Between be in series with the one end interconnected capacitor C13 and capacitor C17, the capacitor C13 and capacitor C17 ground connection；The CAN_H and
Resistance R18 and resistance R19 are in series between CAN_L, and one end that the resistance R18 is connected with resistance R19 passes through capacitor C16
Ground connection；There are two Transient Voltage Suppressors for series connection between the CAN_H and CAN_L.
Optionally, second CAN communication module includes CAN driving chip U1, the 1st pipe of the CAN driving chip U1
Foot and the 8th pin are all connected to+5V power supply, and are grounded respectively by capacitor C4 and C5；The 4th pipe of the CAN driving chip U1
Foot and the 5th pin ground connection, the 2nd pin of the CAN driving chip U1 is connected to the 60th pin of the second controller, described
The 3rd pin of CAN driving chip U1 is connected to the 61st pin of the second controller；Meanwhile the CAN driving chip U1
6th pin and the 7th pin pass through CAN_L and CAN_H that common mode choke is connected to CAN bus, the CAN_H and CAN_ respectively
Capacitor C2 and capacitor C10, the capacitor C2 and capacitor C10 one end ground connection interconnected is also in series between L；The CAN_H
Resistance R5 and resistance R9 are in series between CAN_L, and one end that the resistance R5 is connected with resistance R9 is connect by capacitor C8
Ground；There are two Transient Voltage Suppressors for series connection between the CAN_H and CAN_L.
The present invention solves technical problem and also uses: a kind of high-voltage relay method for diagnosing status of new-energy automobile utilizes
Above-mentioned device is realized comprising:
S10, the relay coil voltage acquisition module acquire the voltage of the coil of high-voltage relay, and the voltage is believed
Number it is transferred to first controller；
S20, the High voltage output voltage acquisition module acquire the high tension voltage at the both ends of the switch of high-voltage relay, and will
The HV voltage signal is transferred to the second controller；
S30, the coil voltage exception when high-voltage relay, one end high-voltage electricity positive pressure of the switch of the high-voltage relay
Often, when the other 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, 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
When the electric voltage exception of one end, it is judged as high-voltage relay contact fault.
The invention has the following beneficial effects: 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 to the first controller and isolated power supply module；Described first
Controller output signal is to relay driving module, to control the movement of high-voltage relay J1 and high-voltage relay J2；Relay
Coil voltage acquisition module acquires the coil voltage of high-voltage relay, and voltage analog is input at the first controller
Reason, the information of voltage after handling are transmitted to CAN bus by the first CAN communication module；High voltage output voltage acquisition module is adopted
Collect relay contact-voltage, and the contact voltage is input to second controller, second controller leads to the high pressure information of acquisition
It crosses the second CAN communication module to be transferred in CAN bus, the first controller judges the driving of high-voltage relay according to bus message
And fault alarm and High voltage output are protected.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the high-voltage relay state diagnostic apparatus of new-energy automobile of the invention；
Fig. 2 is the structural schematic diagram of the first controller of the invention；
Fig. 3 is the structural schematic diagram of second controller of the invention；
Fig. 4 is the structural schematic diagram of relay driving module of the invention；
Fig. 5 is the structural schematic diagram of relay coil voltage acquisition module of the invention；
Fig. 6 is the structural schematic diagram of High voltage output voltage acquisition module of the invention；
Fig. 7 is the structural schematic diagram of the first CAN communication module of the invention；
Fig. 8 is the structural schematic diagram of the second CAN communication module of the invention；
Fig. 9 is the structural schematic diagram of power module of the invention；
Figure 10 is the structural schematic diagram of isolated power supply module of the invention；
Specific embodiment
Technical solution of the present invention is further elaborated below with reference to examples and drawings.
Embodiment 1
A kind of high-voltage relay state diagnostic apparatus of new-energy automobile is present embodiments provided, it is defeated with low-voltage driving
Feedback and High voltage output detection function out, ensure that high voltage power distribution, and improve the service life of high-voltage relay；Specifically
Ground, described device include: the first controller, second controller, relay driving module, high-voltage relay, relay coil electricity
Press acquisition module, High voltage output voltage acquisition module, the first power module and isolated power supply module；
First power module circuitry is connected to first controller, to provide power supply to first controller,
Moreover, first power module also circuit connection is in the isolated power supply module, it is electric to be provided to the isolated power supply module
Can, in the present embodiment, the input of first power module is+12V power supply, and exports+5V power supply, 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 are as follows: TLE4675；The power supply chip U4's
1st pin is connected to the cathode of diode D6, and the anode of the diode D6 is connected to+12V power supply, to pass through the diode
D6 realizes that the reverse phase of power supply chip U4 is shorted defencive function；1st pin of the power supply chip also pass through in parallel capacitor C22 and
Capacitor C23 ground connection, to be filtered by capacitor C22 and capacitor C23 to the power supply of input；The 3rd pipe of the power supply chip U4
Foot ground connection；The 4th pin of the power supply chip U4 is grounded by capacitor C24, and the 5th pin of the power supply chip is for defeated
The power supply of+5V out, and the 5th pin of the power supply chip is grounded by capacitor C27 and capacitor C28 in parallel, to pass through
It states after capacitor C27 and capacitor C28 be filtered the+5V power supply of output, is input to 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 first controller is model at this time
The single-chip microcontroller of MC9S12G48, first controller signals are connected to the relay driving module, to pass through the relay
Drive module drives high-voltage relay work.
The second controller is also the single-chip microcontroller of model MC9S12G48.
The relay driving module includes chip U7, the model of the chip U7 are as follows: BTS723GW, the chip U7's
11st pin is connected to+5V power supply (VCC), and by capacitor C12 and capacitor C34 ground connection in parallel, to pass through the capacitor
C12 and capacitor C34 are filtered the power supply of input, and the 3rd pin of the chip U7 is connected to the of first controller
5th pin of 21 pins, the chip U7 is connected to the 22nd pin of first controller；The 2nd pin of the chip U7
It is connected to the 63rd pin of first controller, and is grounded by resistance R43；The 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；The 4th pin ground connection of the chip U7 simultaneously；The chip
The 1st pin, the 7th pin, the 8th pin and the 14th pin of U7 is all connected to VBR power supply (such as+24V power supply), 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 capacitor C36；It is described
The other end of the coil of high-voltage relay J1 is grounded；And the chip U7 the 9th pin and the 10th pin be all connected to it is described
One end of the coil of high-voltage relay J2, and be grounded by capacitor 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 supply by resistance R34, and is connected to the cathode 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 supply by resistance R35, and is connected to
The cathode of diode D1, the plus earth of the diode D1.
When first controller the 63rd pin and the 62nd pin to the chip U7 send high-voltage relay switch
When signal, the relay driving module can control turning on or off for the high-voltage relay, that is to say, that described first
When 62 pin of ground of controller exports high level, the 9th pin of the chip U7 and the 10th pin output high level control high pressure
Relay J2 movement, similarly, when 63 pin of ground of first controller exports high level, the 12nd pin of the chip U7
With the output high level control high-voltage relay J1 movement 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 acquire the voltage of relay coil, in the present embodiment, it is described after
Electric apparatus coil voltage acquisition module includes capacitor C18, capacitor C19, resistance R27 and resistance R25, the line of the high-voltage relay J1
One end of circle is grounded by capacitor C19, and the 33rd pin of first controller is connected to by resistance R25, meanwhile, it is described
33rd pin of the first controller passes through capacitor C18 and resistance R27 ground connection in parallel.
Moreover, to realize the acquisition to the coil voltage of high-voltage relay J2, the relay coil voltage acquisition module
It further include that capacitor C20, capacitor C21, resistance R28 and resistance R29, one end of the coil of the high-voltage relay J2 pass through capacitor
C21 is grounded, and the 34th pin of first controller is connected to by resistance R28, meanwhile, the 34th of first controller the
Pin passes through capacitor C20 and resistance R29 ground connection in parallel.
That is, by the partial pressure of resistance R25 and resistance R27, realizing the coil of high-voltage relay J1 in the present embodiment
The measurement of voltage realize the survey of the voltage of the coil of high-voltage relay J2 and by the partial pressure of resistance R28 and resistance R29
Amount, and the voltage signal measured is transferred to first controller and carries out AD sampling, and by first controller to institute
Voltage signal is stated to be analyzed and handled.
The High voltage output voltage acquisition module is used to 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, capacitor C3 and diode
D1；One end (always just) of the switch of the high-voltage relay J1 and high-voltage relay J2 passes through concatenated resistance R1, resistance
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 capacitor C3, meanwhile, one end that the resistance R3 is connected with resistance R4 is grounded by resistance R8, and passes through diode D1
Connection+5V power supply；That is, the anode of the diode D1 is connected to one end that the resistance R3 is connected with resistance R4, institute
The cathode for stating diode D1 is connected to+5V power supply, to carry out clamper by diode D1.
The other end of the switch of the high-voltage relay J1 passes through concatenated resistance R10, 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 capacitor C11
Ground, meanwhile, one end that the resistance R12 is connected with resistance R13 is grounded by resistance R14, and passes through diode D3 connection+5V electricity
Source；That is, the anode of the diode D3 is connected to one end that the resistance R12 is connected with resistance R13, the diode
The cathode of D3 is connected to+5V power supply.
The other end of the switch of the high-voltage relay J2 passes through concatenated resistance R19, 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 capacitor C14
Ground, meanwhile, one end that the resistance R21 is connected with resistance R22 is grounded by resistance R23, and passes through diode D5 connection+5V electricity
Source；That is, the anode of the diode D5 is connected to one end that the resistance R21 is connected with resistance R22, the diode
The cathode of D5 is connected to+5V power supply.
That is, one end of the switch of high-voltage relay J1 passes through resistance R1, resistance R2, resistance R3 and resistance R8 points
Pressure, and after being filtered by diode D1 clamper and resistance R4 and capacitor C3, high-voltage signal is transferred to second control
Device processed, and similarly, the other end of the switch of the other end and high-voltage relay J2 of the switch of high-voltage relay J1 is also by it
High-voltage signal is transferred to the second controller.
First controller is connected to the second controller by CAN bus signal, it is highly preferred that first control
Device processed is connected to CAN bus by the first CAN communication module signal, meanwhile, the second controller passes through the second CAN communication mould
Block signal is connected to CAN bus, to realize that first controller is connected with the signal of second controller.
In the present embodiment, first CAN communication module includes isolation level conversion chip, and the isolation level converts core
Piece is the chip of model PCA82C50, and the 1st pin of the isolation level conversion chip is connected to first controller
4th pin of the 61st pin, the isolation level conversion chip is connected to the 60th pin of first controller；The isolation
2nd pin of electrical level transferring chip is grounded, and the 3rd pin of the isolation level conversion chip is connected to+5V power supply, and passes through 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 pass through CAN_L and CAN_H that common mode choke is connected to CAN bus respectively, the present embodiment
In, the common mode choke can be the ACT45B-510-2P-TL of TDK company, and main function is to control common mode interference.
In the present embodiment, capacitor C13 and capacitor C17 are in series between the CAN_H and CAN_L, moreover, the capacitor
C13 and capacitor C17 one end ground connection interconnected；Meanwhile resistance R18 and resistance are in series between the CAN_H and CAN_L
R19, and one end that the resistance R18 is connected with resistance R19 is grounded by capacitor C16；It is gone here and there between the CAN_H and CAN_L
There are two Transient Voltage Suppressors for connection；In the present embodiment, the Transient Voltage Suppressor is the core of model MMBZ33VALT1G
3rd pin of piece, the chip of the model MMBZ33VALT1G is hanging, and described two Transient Voltage Suppressors are connected with each other
One end ground connection.
Second CAN communication module includes CAN driving chip U1, the model of the chip U1 are as follows: TJA1050T, it is described
The 1st pin and the 8th pin of CAN driving chip U1 is all connected to+5V power supply, and is grounded respectively by capacitor C4 and C5；It is described
The 4th pin of CAN driving chip U1 and the 5th pin ground connection, the 2nd pin of the CAN driving chip U1 are connected to described second
3rd pin of the 60th pin of controller, the CAN driving chip U1 is connected to the 61st pin of the second controller；Together
When, the 6th pin and the 7th pin of the CAN driving chip U1 passes through the CAN_L that common mode choke is connected to CAN bus respectively
And CAN_H, in the present embodiment, the common mode choke can be the ACT45B-510-2P-TL of TDK company, and main function be
Control common mode interference.
In the present embodiment, capacitor C2 and capacitor C10 are also in series between the CAN_H and CAN_L, moreover, the capacitor
C2 and capacitor C10 one end ground connection interconnected；Meanwhile resistance R5 and resistance R9 are in series between the CAN_H and CAN_L,
And one end that the resistance R5 is connected with resistance R9 is grounded by capacitor C8；Between the CAN_H and CAN_L there are two series connection
Transient Voltage Suppressor；In the present embodiment, the Transient Voltage Suppressor is the chip of model MMBZ33VALT1G, the type
Number for MMBZ33VALT1G chip the 3rd pin it is hanging, and described two Transient Voltage Suppressors it is interconnected one termination
Ground.
The isolated power supply module provides power supply to the second controller, and the isolated power supply module includes isolation
Power supply chip U5, the model of the chip U5 are as follows: DCR010505, the 1st pin and the 2nd pin of the isolated power supply chip U5
It is all connected to+5V power supply, the 26th pin of the isolated power supply chip U5 and the 27th pin ground connection；The isolated power supply chip U5
The 13rd pin ground connection, the 14th pin of the isolated power supply chip U5 connected by capacitor C25 and C26 ground connection in parallel
In the 49th pin of the second controller and the 50th pin, to be mentioned by the isolated power supply module to the second controller
Power supply source.
In the present embodiment, by foregoing circuit connection relationship, the power module is also to the relay driving module,
One CAN communication module and the second CAN communication module provide power supply.
The high-voltage relay state diagnostic apparatus of the new-energy automobile of the present embodiment passes through the first power module generation+5V
Power supply, and the power supply is supplied to the first controller and isolated power supply module；First controller output signal is to relay
Drive module, to control the movement of high-voltage relay J1 and high-voltage relay J2；The acquisition of relay coil voltage acquisition module is high
The coil voltage of potential relay, and voltage analog is input to the first controller and is handled, the information of voltage after handling
CAN bus is transmitted to by the first CAN communication module；High voltage output voltage acquisition module acquires relay contact-voltage, and will
The contact voltage is input to second controller, and second controller transmits the high pressure information of acquisition by the second CAN communication module
Onto CAN bus, the first controller is according to bus message (relay coil voltage acquisition module voltage signal detected and height
Press output voltage acquisition module voltage signal collected), judge driving and fault alarm and the High voltage output of high-voltage relay
Protection.
The high-voltage relay state diagnostic apparatus of new-energy automobile of the invention be able to solve low-voltage driving output feedback and
High voltage output detection function ensure that high voltage power distribution and functional safety, extend total positive relay service life.
Embodiment 2
The high-voltage relay method for diagnosing status for present embodiments providing a kind of new-energy automobile uses 1 institute of embodiment
The high-voltage relay state diagnostic apparatus for the new-energy automobile stated is realized, and includes:
S10, the relay coil voltage acquisition module acquire the voltage of the coil of high-voltage relay, and the voltage is believed
Number it is transferred to first controller；
S20, the High voltage output voltage acquisition module acquire the high tension voltage at the both ends of the switch of high-voltage relay, and will
The HV voltage signal is transferred to the second controller；
S30, the coil voltage exception when high-voltage relay, one end high-voltage electricity positive pressure of the switch of the high-voltage relay
Often, when the other end (output 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, 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
When one end (output end) electric voltage exception, it is judged as high-voltage relay contact fault；
When the first controller output cut-off signals are to relay driving module, at this point, 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 high
Potential relay contact adhesion；If upper high-voltage electricity again, it is necessary to first exclude the failure.Such as the failure is not excluded for, when upper high-voltage electricity,
When the road high-voltage relay attonity, road output high-voltage electricity extremely not only influences life safety, also results in total positive high voltage relay
Device damage.
The sequencing of above embodiments is not only for ease of description, represent the advantages or disadvantages of the embodiments.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (1)
1. a kind of high-voltage relay method for diagnosing status of new-energy automobile utilizes the high-voltage relay state of new-energy automobile
Diagnostic device realizes, the high-voltage relay state diagnostic apparatus of the new-energy automobile include the first controller, second controller,
Relay driving module, high-voltage relay, relay coil voltage acquisition module, High voltage output voltage acquisition module, the first electricity
Source module and isolated power supply module；
First power module is used to provide electric energy to first controller and isolated power supply module；
First controller signals are connected to the relay driving module, turn on or off signal to described for sending
Relay driving module；
The relay driving module circuit connection in the high-voltage relay, for according to the opening of first controller or
Person's shutdown signal controls the high-voltage relay and turns on or off；
The relay coil voltage acquisition module is used to detect the voltage of the coil of the high-voltage relay, and acquired
Voltage signal is transferred to first controller；
The High voltage output voltage acquisition module is used to detect the voltage at the both ends of the switch of the high-voltage relay, and is adopted
The voltage signal transmitting of collection refers to first controller and second controller；
First controller and second controller pass through the first CAN communication module respectively and the second CAN communication module signal connects
It is connected to CAN bus；
First controller is adopted according to relay coil voltage acquisition module voltage signal detected and High voltage output voltage
Collect module voltage signal collected, the failure of relay driving module and high-voltage relay is judged；
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 supply, and by simultaneously
The capacitor C12 and capacitor C34 of connection are grounded, and 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；The 2nd pin of the chip U7 is connected to described
63rd pin of the first controller, and be grounded by resistance R43；The 6th pin of the chip U7 is connected to first control
62nd pin of device, and be grounded by resistance R44；The 4th pin of the chip U7 is grounded；The 1st pin of the chip U7,
7 pins, the 8th pin and the 14th pin are all connected to VBR power supply, and the 12nd pin and the 13rd pin of the chip U7 is connected to institute
One end of the coil of high-voltage relay J1 is stated, and is grounded by capacitor C36；Another termination of the coil of the high-voltage relay J1
Ground；And the chip U7 the 9th pin and the 10th pin be all connected to the high-voltage relay J2 coil one end, and lead to
Cross capacitor 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 passes through electricity
Resistance R34 is connected to VBR power supply, and is connected to the cathode of diode D8, the plus earth of the diode D8；The high pressure after
One end of the coil of electric appliance J2 is connected to VBR power supply by resistance R35, and is connected to the cathode of diode D1, two pole
The plus earth of pipe D1；
The relay coil voltage acquisition module includes capacitor C18, capacitor C19, resistance R27, resistance R25, capacitor C20, electricity
Hold C21, resistance R28 and resistance R29；
One end of the coil of the high-voltage relay J1 is grounded by capacitor C19, and is connected to first control by resistance R25
33rd pin of the 33rd pin of device processed, first controller passes through capacitor C18 and resistance R27 ground connection in parallel；The height
One end of the coil of potential relay J2 is grounded by capacitor C21, and is connected to the 34th of first controller the by resistance R28
34th pin of pin, first controller passes through capacitor C20 and resistance R29 ground connection in parallel；
The High voltage output voltage acquisition module includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R8, capacitor C3, two
Pole pipe D1, resistance R10, resistance R11, resistance R12, resistance R13, capacitor C11, resistance R14, diode D3, resistance R19, resistance
R20, resistance R21, resistance R22, capacitor C14, resistance R23 and diode D5；
One end of the switch of the high-voltage relay J1 and high-voltage relay J2 passes through concatenated resistance R1, resistance R2, electricity
Resistance R3 and resistance R4 is connected to the 33rd pin of the second controller, and the 33rd pin of the second controller passes through electricity
Hold C3 ground connection, meanwhile, one end that the resistance R3 is connected with resistance R4 is grounded by resistance R8, and the anode of the diode D1 is even
It is connected to one end that the resistance R3 is connected with resistance R4, the cathode of the diode D1 is connected to+5V power supply；
The other end of the switch of the high-voltage relay J1 passes through concatenated resistance R10, resistance R11, resistance R12 and resistance R13
It is connected to the 34th pin of the second controller, and the 34th pin of the second controller is grounded by capacitor C11, together
When, one end that the resistance R12 is connected with resistance R13 is grounded by resistance R14, and the anode of the diode D3 is connected to described
The cathode of one end that resistance R12 is connected with resistance R13, the diode D3 is connected to+5V power supply；
The other end of the switch of the high-voltage relay J2 passes through concatenated resistance R19, resistance R20, resistance R21 and resistance R22
It is connected to the 35th pin of the second controller, and the 35th pin of the second controller is grounded by capacitor C14, together
When, one end that the resistance R21 is connected with resistance R22 is grounded by resistance R23, and the anode of the diode D5 is connected to described
The cathode of one end that resistance R21 is connected with resistance R22, the diode D5 is connected to+5V power supply；
First CAN communication module includes isolation level conversion chip, and the isolation level conversion chip is model
1st pin of the chip of PCA82C50, the isolation level conversion chip is connected to the 61st pin of first controller, institute
The 4th pin for stating isolation level conversion chip is connected to the 60th pin of first controller；The isolation level converts core
2nd pin of piece is grounded, and the 3rd pin of the isolation level conversion chip is connected to+5V power supply, and is grounded by capacitor C15；
8th pin of the isolation level conversion chip is grounded by resistance R26, the 6th pin of the isolation level conversion chip and
7th pin passes through the CAN_L and CAN_H that common mode choke is connected to CAN bus respectively, connects between the CAN_H and CAN_L
There is capacitor C13 and capacitor C17, the capacitor C13 and capacitor C17 one end ground connection interconnected；The CAN_H and CAN_L it
Between be in series with resistance R18 and resistance R19, and one end that the resistance R18 is connected with resistance R19 is grounded by capacitor C16；Institute
Stating series connection between CAN_H and CAN_L, there are two Transient Voltage Suppressors；
Second CAN communication module includes CAN driving chip U1, the 1st pin and the 8th pin of the CAN driving chip U1
It is all connected to+5V power supply, and is grounded respectively by capacitor C4 and C5；The 4th pin and the 5th pin of the CAN driving chip U1
Ground connection, the 2nd pin of the CAN driving chip U1 are connected to the 60th pin of the second controller, the CAN driving chip
The 3rd pin of U1 is connected to the 61st pin of the second controller；Meanwhile the 6th pin of the CAN driving chip U1 and
7 pins pass through the CAN_L and CAN_H that common mode choke is connected to CAN bus respectively, also connect between the CAN_H and CAN_L
There is capacitor C2 and capacitor C10, the capacitor C2 and capacitor C10 one end ground connection interconnected；Between the CAN_H and CAN_L
It is in series with resistance R5 and resistance R9, and one end that the resistance R5 is connected with resistance R9 is grounded by capacitor C8；The CAN_H
There are two Transient Voltage Suppressors for series connection between CAN_L；
It is characterized in that, which comprises
S10, the relay coil voltage acquisition module acquire the voltage of the coil of high-voltage relay, and the voltage signal is passed
It is handed to first controller；
S20, High voltage output voltage acquisition module acquisition high-voltage relay switch both ends high tension voltage, and by high pressure
Voltage signal is transferred to the second controller；
S30, the coil voltage exception when 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
When electric voltage exception, it is judged as high-voltage relay contact fault.
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| CN107703447A (en) * | 2017-10-23 | 2018-02-16 | 风度（常州）汽车研发院有限公司 | Condition checkout gear and dynamical system |
| CN107621565B (en) * | 2017-10-23 | 2024-03-22 | 宁德时代新能源科技股份有限公司 | High voltage detection circuit, detector, battery device and vehicle |
| CN107807260A (en) * | 2017-10-25 | 2018-03-16 | 深圳巴斯巴科技发展有限公司 | High-voltage relay voltage ageing automatic testing stand |
| DE102017223229A1 (en) * | 2017-12-19 | 2019-06-19 | Volkswagen Aktiengesellschaft | Electrical system and method for diagnosing the functionality of power relays in an electrical system |
| CN108363003A (en) * | 2018-05-08 | 2018-08-03 | 新乡市荣泰电器有限公司 | A kind of vehicle-mounted relay state monitoring method and system |
| CN109254244B (en) * | 2018-10-10 | 2021-09-17 | 中核控制系统工程有限公司 | Relay contact fault diagnosis system |
| CN109116230B (en) * | 2018-10-26 | 2024-05-03 | 常州是为电子有限公司 | High-voltage relay state on-line monitoring device and method |
| CN109490772A (en) * | 2019-01-11 | 2019-03-19 | 珠海广通汽车有限公司 | Electric relay detection device and system |
| 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 |
| CN110888050B (en) * | 2019-11-12 | 2022-04-22 | 东风汽车有限公司 | Relay adhesion detection device and vehicle |
| CN111044897A (en) * | 2019-12-27 | 2020-04-21 | 珠海格力电器股份有限公司 | Relay state detection circuit, control method and whole vehicle integrated controller |
| CN113752841B (en) * | 2021-09-14 | 2023-05-12 | 珠海格力电器股份有限公司 | Fault determination device and method for all-in-one controller PDU module and automobile |
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