CN106891765A - A kind of CAN interface for vehicle-mounted mobile charging device - Google Patents
A kind of CAN interface for vehicle-mounted mobile charging device Download PDFInfo
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- CN106891765A CN106891765A CN201710119820.6A CN201710119820A CN106891765A CN 106891765 A CN106891765 A CN 106891765A CN 201710119820 A CN201710119820 A CN 201710119820A CN 106891765 A CN106891765 A CN 106891765A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Automation & Control Theory (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of CAN interface for vehicle-mounted mobile charging device in electric automobile field, including CAN interface chip U3, CAN transceiving chip U4, and the first isolating chip U5 and the second isolating chip U6, wherein described CAN interface chip U3 is provided with TXD1 interfaces and RXD1 interfaces, the CAN transceiving chip U4 is provided with TXD2 interfaces and RXD2 interfaces, the first isolating chip U5 is located at and states between the TXD1 interfaces of CAN interface chip U3 and the TXD2 interfaces of the CAN transceiving chip U4, the second isolating chip U5 is located at and states between the RXD1 interfaces of CAN interface chip U3 and the RXD2 interfaces of the CAN transceiving chip U4.It has the technical effect that：Potential difference can be reduced for influence and interference that vehicle-mounted mobile charging device is monitored, the extension of vehicle-mounted mobile charging device is also allowed for.
Description
Technical field
The present invention relates to a kind of CAN interface for vehicle-mounted mobile charging device in the field of powering.
Background technology
Due to the significant advantage of electric automobile, current electric automobile is fast-developing to turn into a kind of very important traffic
Instrument.Each major country all using promote and Development of EV as important development strategy, as the important of energy-saving and emission-reduction
Means.The current various electric automobiles of China have reached several ten million.The existing big Multifunctional electric pond of electric automobile is used as energy storage
Device, during electric automobile use, due to human negligence or equipment fault, it may appear that be parked in road because electric energy exhausts
In situation, it is necessary to supplement the energy get near fill/change electric point.
The content of the invention
The invention aims to overcome the deficiencies in the prior art, there is provided a kind of for vehicle-mounted mobile charging device
CAN interface, it can reduce potential difference for influence and interference that vehicle-mounted mobile charging device is monitored, also allow for vehicle-mounted shifting
The extension of dynamic charging device.
Realizing a kind of technical scheme of above-mentioned purpose is：A kind of CAN interface for vehicle-mounted mobile charging device, bag
CAN interface chip U3, CAN transceiving chip U4, and the first isolating chip U5 and the second isolating chip U6 are included, wherein
The CAN interface chip U3 is provided with TXD1 interfaces and RXD1 interfaces, and the CAN transceiving chip U4 is provided with TXD2
Interface and RXD2 interfaces, the first isolating chip U5 are total positioned at the TXD1 interface and the CAN for stating CAN interface chip U3
Between the TXD2 interfaces of line transceiving chip U4, the second isolating chip U5 connects positioned at the RXD1 for stating CAN interface chip U3
Between mouth and the RXD2 interfaces of the CAN transceiving chip U4.
Further, the first isolating chip U5 and the second isolating chip U6 uses identical Phototube Coupling core
Piece, the first isolating chip U5 and the second isolating chip U6 are oppositely arranged.
Further, the first isolating chip U5 include NC5 interfaces, VF5+ interfaces, VF5- interfaces, NC7 interfaces,
VE5 interfaces, VO5 interfaces, GND5 interfaces and VCC5 interfaces, VF5+ interfaces connect+5V power ends by resistance R13, and VF5- interfaces connect
The TXD1 interfaces of the CAN interface chip U3 are connect, VF5+ interfaces and VF5- interfaces lead in the first isolating chip U5
The connection of the first light emitting diode is crossed, VE5 interfaces, VO5 interfaces, GND5 interfaces pass through first in the first isolating chip U5
PMOS is connected, VE5 interfaces, VO5 interfaces, the base stage of GND5 interfaces correspondence connection first PMOS, emitter stage and discrete
Pole, GND5 interfacing grounds, VE5 interfaces pass through the resistance R14 being sequentially connected in series and electric capacity C21 is grounded, and VO5 interfaces pass through resistance R15
Connect+5V power ends and connect the TXD2 interfaces of the CAN transceiving chip U4, VCC5 interfaces connection+5V power ends；
The second isolating chip U6 includes that NC6 interfaces, VF6+ interfaces, VF6- interfaces, NC8 interfaces, VE6 interfaces, VO6 connect
Mouth, GND6 interfaces and VCC6 interfaces, VF6+ interfaces connect+5V power ends by resistance R16, and VF6- interfaces connect the CAN
The RXD2 interfaces of transceiving chip U4, VF6+ interfaces and VF6- interfaces pass through the second light-emitting diodes in the second isolating chip U6
Pipe is connected, and VE6 interfaces, VO6 interfaces, GND6 interfaces are connected in the second isolating chip U6 by the second PMOS, and VE6 connects
Mouth, the base stage of VO6 interfaces, GND6 interfaces correspondence connection second PMOS, emitter stage and discrete pole, GND6 interfacing grounds,
VE6 interfaces pass through the resistance R17 being sequentially connected in series and electric capacity C22 is grounded, and VO6 interfaces connect+5V power ends and connect by resistance R18
Connect the RXD1 interfaces on the CAN interface chip U3, VCC6 interfaces connection+5V power ends.
Further, main process task in connection vehicle-mounted mobile charging device is additionally provided with the CAN interface chip U3
AD0~AD7 interfaces of device, and the INT1 interfaces of the power end of+5V are connected by resistance R20.
Further, it is additionally provided with the CAN interface chip U3 and+5V power ends is connected by resistance R8, is passed through
The RX1 interfaces of resistance R19 ground connection.
Further, the CAN interface chip U3 is provided with while meeting MODE interfaces, the VDD1 of+5V power ends
Interface, VDD2 interfaces, VDD3 interfaces, and VSS1 interfaces, VSS2 interfaces and the VSS3 interface being grounded simultaneously, earth terminal and+5V
Electric capacity C15 is provided between power end.
Further, the CAN interface chip U3 is provided with XTAL1 interfaces and XTAL2 interfaces, the XTAL1
Be provided with clock circuit between interface and the XTAL2 interfaces, the clock circuit including two ends connect respectively XTAL1 interfaces and
The crystal oscillator jz2 of XTAL2 interfaces, and by XTAL1 interfacing grounds, the electric capacity C16 and resistance R9 being sequentially connected in series, and incite somebody to action
The electric capacity C17 of XTAL2 interfacing grounds.
Further, the CAN transceiving chip U4 is provided with TXD2 interfaces, RXD2 interfaces, VREF interfaces, RS and connects
Mouth, CANH interfaces, CANL interfaces, VCC2 interfaces and GND2 interfaces, RS interfaces are grounded by resistance R12, and CANH interfaces are by electricity
Resistance R10 and electric capacity C18 ground connection, CANL interfaces are grounded by resistance R11 and electric capacity C19, VCC2 interfaces connection+5V power ends, and
It is grounded by electric capacity C20, GND2 interfacing grounds.
Employ a kind of technical scheme of CAN interface for vehicle-mounted mobile charging device of the invention, including CAN
Bus Interface Chip U3, CAN transceiving chip U4, and the first isolating chip U5 and the second isolating chip U6, wherein described
CAN interface chip U3 is provided with TXD1 interfaces and RXD1 interfaces, and the CAN transceiving chip U4 is provided with TXD2 interfaces
With RXD2 interfaces, the first isolating chip U5 is positioned at TXD1 interfaces and the CAN receipts for stating CAN interface chip U3
Between the TXD2 interfaces of hair chip U4, the second isolating chip U5 be located at the RXD1 interfaces of stating CAN interface chip U3 and
Between the RXD2 interfaces of the CAN transceiving chip U4.It has the technical effect that：Potential difference can be reduced to be filled for vehicle-mounted mobile
The influence and interference of electric installation monitoring, also allow for the extension of vehicle-mounted mobile charging device.
Brief description of the drawings
Fig. 1 is the structural representation of vehicle-mounted mobile charging device.
Fig. 2 is the monitoring system structural representation of vehicle-mounted mobile charging device.
Fig. 3 is a kind of structure chart of CAN interface for vehicle-mounted mobile charging device of the invention.
Fig. 4 is the structure chart in the metering communication loop of vehicle-mounted mobile charging device.
Fig. 5 is the structure chart of the signal isolation transformation loop of vehicle-mounted mobile charging device.
Specific embodiment
Fig. 1 is referred to, the present inventor is led to below in order to be able to preferably understand technical scheme
Specifically embodiment is crossed, and is described in detail with reference to accompanying drawing：
Fig. 1 is referred to, the present inventor is led to below in order to be able to preferably understand technical scheme
Specifically embodiment is crossed, and is described in detail with reference to accompanying drawing：
Fig. 1 is referred to, vehicle-mounted mobile charging device includes：Charging control circuit 1, battery pack 2, power-switching circuit 3, vapour
Car charging circuit 4, monitoring system 5 and charging gun 6.Power-switching circuit 3 can be inverter control circuit 31 and DC/DC conversion controls
Circuit processed 32.Vehicle-mounted mobile charging device is fixed in mobile vehicle, and being given on road can not continue row because electric energy exhausts
The Vehicular charging sailed.
If charging control circuit 1 connects dry cell batteries 2, each battery pack 2 connects a power-switching circuit 3, each electricity
Power-switching circuit 3 is all connected with the automobile charging circuit 4 of matching, the charging gun 6 of the matching connection of automobile charging circuit 4.Battery pack 2 by
Large number of cell is combined by series/parallel mode, and charging gun 6 can be American Standard charging gun, Europe superscript charging gun
Or GB charging gun.
The civil power that outside provides is replaced as direct current by charging control circuit 1, and by galvanic being converted to of electric energy
Can be stored in battery pack 2.When externally output electric energy is needed, the chemical energy in battery pack 2 is by Power convert electricity
Road 3 is converted into the alternating current of standard or meets the direct current of electric automobile demand.Charging electric vehicle circuit 4 is responsible for and external electrical
Electrical automobile is communicated, and charging gun 6 is managed and controlled.The chemical energy in battery pack 2 is converted in power-switching circuit 3
For the alternating current of standard is inverter control circuit 31, the chemical energy in battery pack 2 is converted into and meets electric automobile demand
Direct current is DC/DC conversion control circuits 32.
The control of monitoring system 5 charging control circuit 1, battery pack 2, power-switching circuit 3, automobile charging circuit 4 and charging
Rifle 6., and with display, metering, charging function.
Fig. 2 is referred to, monitoring system 5 includes primary processor 50 and the ic for energy metering being connected with primary processor 50
51st, house dog 52, keyboard 53, liquid crystal display 54, swiping card interface device 55, sound prompt device 56, warning device 57, wireless
Network interface 58, GPS interface 59 and equalization charging circuit 500.Remote monitoring terminal can be realized to vehicle-mounted by GPS interface 59
The positioning of mobile charging device, collection, the prison to vehicle-mounted mobile charging device status data are realized by radio network interface 58
Depending on and remote transmission so that support on a large scale it is interior to vehicle-mounted mobile charging device carry out centralized watch and control.Monitoring system
A kind of three tunnels CAN interface for vehicle-mounted mobile charging device of the invention is additionally provided with system 5.
CAN interface described in the first via connects all of automobile charging circuit 4, and each automobile charging circuit 4 connects right
The charging gun 6 answered.Automobile charging circuit 4 can complete phase under the control of primary processor 50, according to the difference of the standard of charging gun 6
The operation answered.
CAN interface described in second tunnel connects all of power-switching circuit 3, i.e., all of He of inverter control circuit 31
DC/DC conversion control circuits 32.The low-voltage DC that correspondence battery pack 2 is stored is converted to standard by each inverter control circuit 31
Power frequency sinusoidal ac, while being monitored to the state parameter of reversals.DC/DC conversion control circuits 32, predominantly
Direct current drive automobile provides charge power supply, main to realize the low-voltage DC that battery pack 2 is stored to be converted to the straight of high voltage
Stream electricity, while the parameter such as temperature, voltage and current to conversion process is monitored.
CAN interface described in 3rd tunnel connects all of battery monitor circuit 20, and each battery monitor circuit 20 is connected
Corresponding battery pack 2.Battery monitor circuit 20, the main state parameter realized to cell in battery pack 2 and battery pack 2,
Voltage, temperature etc., measure, monitor and assess.The sensor of monomer battery voltage of the measurement of battery monitor circuit 20 is also
The important parameter acquisition sensor that equalization charging circuit 500 is controlled to charging control circuit 1.
Ic for energy metering 51, house dog 52, keyboard 53, liquid crystal display 54, swiping card interface device 55, voice message dress
56, warning device 57, radio network interface 58 and GPS interface 59, equalization charging circuit 500 are put, with automobile charging circuit 4, inverse
Become control circuit 31, DC/DC conversion control circuits 32, battery monitor circuit 20, and primary processor 50 and its peripheral circuit are total to
It is same to constitute a complete distributed monitoring network, it is possible to implement comprehensive monitoring and control to vehicle-mounted mobile charging device.
Monitoring system 5 is with good expansibility, and is adapted to the vehicle-mounted mobile charging device of different scales.
In addition primary processor 50 is provided with necessary memory, clock and power supply.
The CAN interface includes CAN interface chip U3, CAN transceiving chip U4, and the first isolated core
Piece U5 and the second isolating chip U6.Wherein CAN interface chip U3 is SJA100 chips, and CAN transceiving chip U4 is
82C50 chips.First isolating chip U5 and the second isolating chip U6 are 6N137 chips.
Wherein CAN interface chip U3 is provided with AD0~AD7 interfaces, CS1 interfaces, ALE/AS1 interfaces, RD/E interfaces,
WR interfaces, INT1 interfaces, RST1 interfaces and CLKOUT1 interfaces.
Wherein INT1 interfaces are the resistance R20 connection+5V power ends of 4.7k Ω by resistance.AD0~AD7 interfaces are used for real
Existing primary processor 50, and automobile charging circuit 4, inverter controller 31, DC/DC transform controllers 32, battery monitor circuit 20 it
Between communication.
Be additionally provided with CAN interface chip U3 TXD1 interfaces, TX1 interfaces, RXD1 interfaces, RX1 interfaces, MODE interfaces,
VDD1 interfaces, VDD2 interfaces, VDD3 interfaces, VSS1 interfaces, VSS2 interfaces, VSS3 interfaces, XTAL1 interfaces and XTAL2 interfaces, its
Middle RX1 interfaces, for the resistance R8 of 2k Ω connects+5V power ends, are the resistance R19 ground connection of 4.7k Ω by resistance by resistance.
MODE interfaces, VDD1 interfaces, VDD2 interfaces and VDD3 interfaces connection+5V power ends, VSS1 interfaces, VSS2 interfaces, VSS3 interfaces
Ground connection, is provided with the electric capacity C15 that capacitance is 0.1 μ F between earth terminal and+5V power ends.Between XTAL1 interfaces and XTAL2 interfaces
Connection clock circuit, it is 16MHZ that the clock circuit includes that two ends connect XTAL1 interfaces and the vibration frequency of XTAL2 interfaces respectively
Crystal oscillator jz2, and by XTAL1 interfacing grounds, the capacitance being sequentially connected in series is 10M Ω for the electric capacity C16 and resistance of 30pF
Resistance R9, and by the capacitance of XTAL2 interfacing grounds for 30pF electric capacity C17.
CAN transceiving chip U4 be provided with TXD2 interfaces, RXD2 interfaces, VREF interfaces, RS interfaces, CANH interfaces,
CANL interfaces, VCC2 interfaces, GND2 interfaces, RS interfaces are by resistance for the resistance R12 of 47k Ω is grounded.CANH interfaces are by resistance
Be worth be 5 Ω resistance R10 and capacitance for the electric capacity C18 of 30pF is grounded, CANL interfaces by resistance R11 that resistance is 5 Ω and
Capacitance is grounded for the electric capacity C19 of 30pF, VCC2 interfaces connection+5V power ends, and by electric capacity C20 that capacitance is 0.1 μ F
Ground connection.GND2 interfacing grounds.
First isolating chip U5 include NC5 interfaces, VF5+ interfaces, VF5- interfaces, NC7 interfaces, VE5 interfaces, VO5 interfaces,
GND5 interfaces and VCC5 interfaces.Wherein by resistance for the resistance R13 of 1k Ω connects+5V power ends, VF5- interfaces connect VF5+ interfaces
Connect the TXD1 interfaces of CAN interface chip U3.VF5+ interfaces and VF5- interfaces are in the first isolating chip U5 by the first hair
Optical diode is connected.VE5 interfaces, VO5 interfaces, GND5 interfaces are connected in the first isolating chip U5 by the first PMOS, VE5
Interface, VO5 interfaces, the base stage of GND5 interfaces correspondence connection first PMOS, emitter stage and discrete pole.GND5 interfaces connect
Ground, VE5 interfaces are grounded by the resistance R14 that the resistance being sequentially connected in series is 10k Ω and the electric capacity C21 that capacitance is 0.1 μ F, VO5
Interface connects+5V power ends and connects the TXD2 interfaces on CAN transceiving chip U4 by the resistance R15 that resistance is 330 Ω,
VCC5 interfaces connect+5V power ends.
Second isolating chip U6 include NC6 interfaces, VF6+ interfaces, VF6- interfaces, NC8 interfaces, VE6 interfaces, VO6 interfaces,
GND6 interfaces and VCC6 interfaces.Wherein by resistance for the resistance R16 of 1k Ω connects+5V power ends, VF6- interfaces connect VF6+ interfaces
Connect the RXD2 interfaces on CAN transceiving chip U4.VF6+ interfaces and VF6- interfaces pass through second in the second isolating chip U6
Light emitting diode is connected.VE6 interfaces, VO6 interfaces, GND6 interfaces are connected in the second isolating chip U6 by the second PMOS,
VE6 interfaces, VO6 interfaces, the base stage of GND6 interfaces correspondence connection second PMOS, emitter stage and discrete pole.GND6 interfaces
Ground connection, VE6 interfaces are grounded by the resistance R17 that the resistance being sequentially connected in series is 10k Ω and the electric capacity C22 that capacitance is 0.1 μ F,
VO6 interfaces connect+5V power ends and connect the RXD1 on CAN interface chip U3 and connect by the resistance R18 that resistance is 330 Ω
Mouthful, VCC6 interfaces connection+5V power ends.
The monitoring system 5 of the vehicle-mounted mobile charging device is connected to the total of outside by the CAN interface shown in Fig. 3
Line expansion module, the potential difference for reducing different CAN expansion modules communicates and monitoring function generation shadow to monitoring system 5
Ring, while by the Phototube Coupling measure of the first isolating chip U5 and the second isolating chip U6, improving monitoring system 5 anti-interference
Property.
Vehicle-mounted mobile charging device is by automobile charging circuit 4, inverter control circuit 31, DC/DC conversion control circuits
32nd, the modularized design of battery monitor circuit 20, by the CAN interface of standard and customized User-level communication realize with
The transmission of data, signal, control instruction and control parameter between primary processor 50.
Ic for energy metering 51 includes signal isolation transformation loop 512 and metering communication loop 511.
Metering communication loop 511 includes that electric energy computation chip U1, electric energy computation chip U1 are ADE7758 electric energy metrical cores
Piece.Electric energy computation chip U1 be provided with RESET interfaces, DVDD interfaces, AVDD interfaces, V1P interfaces, V1N interfaces, V2N interfaces,
V2P interfaces, AGND interfaces, REFin/out interfaces, DGND interfaces, DIN interfaces, DOUT interfaces, SCLK interfaces, CS0 interfaces,
CLKOUT interfaces, CLKIN interfaces, IRQ interfaces, SAG interfaces, ZX interfaces and CF interfaces.
Wherein, RESET interfaces, DVDD interfaces, AVDD interfaces connect+5V power ends and by polarity electricity parallel with one another simultaneously
Hold C2 and electric capacity C1 digital groundings.Wherein the capacitance of polar capacitor C2 is 10 μ F, breakdown voltage 50V.The capacitance of electric capacity C1
0.1μF.AGND interface analogue grounds.DGND interface digital groundings.REFin/out interfaces, by mutual polar capacitor C8 in parallel
With electric capacity C7 digital grounding and analogue grounds simultaneously.Wherein the capacitance of polar capacitor C8 is 10 μ F, breakdown voltage 50V.Electric capacity
The μ F of capacitance 0.1 of C7.DIN interfaces and DOUT interfaces connection primary processor 50.It is provided between CLKOUT interfaces and CLKIN interfaces
Measurement clock circuit, the measurement clock circuit includes the crystal oscillator Y1 being connected between CLKOUT interfaces and CLKIN interfaces, and
Be connected to CLKOUT interfaces and digitally between capacitance for 22pF electric capacity C5 and be connected to CLKIN interfaces and digitally
Between capacitance for 22pF electric capacity C6.
Signal isolation transformation loop 512 includes the first current transformer TV1 and the second electric current of connection automobile charging circuit 4
Transformer TA1, wherein connecting resistance between the Same Name of Ends and the live wire of automobile charging circuit 4 of the first current transformer TV1 primary sides
It is worth the resistance R5 for 200k Ω, the non-same polarity of the first current transformer TV1 primary sides connects the zero line of automobile charging circuit 4,
First current transformer TV1 low-pressure sides non-same polarity ground connection, while the Same Name of Ends of the low-pressure side of the first current transformer TV1 and
It is electric capacity C9, the diode VD5 and diode of 33nF that the resistance R6, capacitance that resistance is 200 Ω are parallel between non-same polarity
The negative pole ground connection of VD6, wherein diode VD5, the plus earth of diode VD6.The low-pressure side of the first current transformer TV1 it is same
Name forms the V2P signal ends of the V2P interfaces of connection electric energy computation chip U1.Synchronous signal isolated variable loop 512 also includes connecting
It is connected between the V2N interfaces of electric energy computation chip U1 and earth terminal, resistance parallel with one another is the resistance R7 and electric capacity of 1k Ω
It is worth the electric capacity C10 for 33nF, is the V2N signal ends of signal isolation transformation loop 512.
The zero line port of charging gun 6 connects the zero line of automobile charging circuit 4, the electricity of FireWire port port connection second of charging gun 6
The non-same polarity of current transformer TA1 primary sides, the Same Name of Ends connection automobile charging circuit 4 of the second current transformer TA1 primary sides
Live wire.The Same Name of Ends connection resistance of the second current transformer TA1 low-pressure sides is the resistance R2 of 200 Ω and ground connection, non-same polarity
Connection resistance is the resistance R3 of 200 Ω and ground connection, and the Same Name of Ends of the second current transformer TA1 low-pressure sides is 1k Ω's by resistance
Resistance R1 connection capacitance be 33nF and ground connection electric capacity C3, and diode VD1 positive pole and the negative pole of diode VD2, shape
Into the V1P signal ends of signal isolation transformation loop 512.The non-same polarity of the second current transformer TA1 is 1k Ω's by resistance
Resistance R4 connection capacitance be 33nF and ground connection electric capacity C4, and diode VD3 negative pole and the positive pole of diode VD4, shape
Into the V1N signal ends of signal isolation transformation loop 512.The negative pole of diode VD1, the positive pole of diode VD2, diode VD3
The negative pole of positive pole and diode VD4 is grounded.
Alternating voltage is converted to the current signal of 2mA, Ran Houtong by resistance R5 first for signal isolation transformation loop 512
Crossing the first current transformer TV1 carries out isolated variable, an AC signal of amplitude about 2mA is formed in low-pressure side, by low
The resistance R6 of pressure side 200 Ω in parallel formed the first voltage signal of change proportional to primary side voltage, i.e. V2P signals with
V2N signals.For current signal measurement, in charging gun 6 or automobile charging circuit 4, the second current transformer TA1 of series connection is electricity
Stream is converted into the rated current signal of the 5A of standard in proportion, and the second electric current is then passed through in signal isolation transformation loop 512
The rated current signal of the primary side of the second current transformer TA1, is converted into the second current transformer TA1 by transformer TA1
Low-pressure side low-voltage signal, and by the low-pressure side parallel resistance R2 and resistance R3 in the second current transformer TA1, obtain with
The second voltage signal of the proportional change of primary current is V1N signals and V1N signals.
Metering communication loop 511 by the voltage and current signal transmission of isolated variable to electric energy computation chip U1, it is complete
Into phase, amplitude, virtual value measurement, and calculate power and power parameter, pass to primary processor 50.
Ic for energy metering 51 can carry out voltage, electric current, active, idle and apparent power measurement, fully meet vehicle-mounted shifting
The demand of the metering, monitoring and charging of dynamic charging device.Its measuring accuracy of ic for energy metering 51 is high and will not receive external dry
Disturb the influence of signal.
Those of ordinary skill in the art it should be appreciated that the embodiment of the above be intended merely to explanation the present invention,
And be not used as being limitation of the invention, as long as in spirit of the invention, the change to embodiment described above
Change, modification will all fall in the range of claims of the present invention.
Claims (8)
1. a kind of CAN interface for vehicle-mounted mobile charging device, it is characterised in that：Including CAN interface chip U3,
CAN transceiving chip U4, and the first isolating chip U5 and the second isolating chip U6, wherein the CAN interface chip
U3 is provided with TXD1 interfaces and RXD1 interfaces, and the CAN transceiving chip U4 is provided with TXD2 interfaces and RXD2 interfaces, described
First isolating chip U5 is located at the TXD2 of the TXD1 interfaces and the CAN transceiving chip U4 of stating CAN interface chip U3
Between interface, the second isolating chip U5 is located at RXD1 interfaces and the CAN transmitting-receiving for stating CAN interface chip U3
Between the RXD2 interfaces of chip U4.
2. a kind of CAN interface for vehicle-mounted mobile charging device according to claim 1, it is characterised in that：Institute
The first isolating chip U5 and the second isolating chip U6 is stated using identical photoelectric isolated chip, the first isolating chip U5 and the
Two isolating chip U6 are oppositely arranged.
3. a kind of CAN interface for vehicle-mounted mobile charging device according to claim 2, it is characterised in that：
The first isolating chip U5 include NC5 interfaces, VF5+ interfaces, VF5- interfaces, NC7 interfaces, VE5 interfaces, VO5 interfaces,
GND5 interfaces and VCC5 interfaces, VF5+ interfaces connect+5V power ends by resistance R13, and VF5- interfaces connect the CAN interface
The TXD1 interfaces of chip U3, VF5+ interfaces and VF5- interfaces are connected in the first isolating chip U5 by the first light emitting diode
Connect, VE5 interfaces, VO5 interfaces, GND5 interfaces are connected in the first isolating chip U5 by the first PMOS, VE5 interfaces,
VO5 interfaces, the base stage of GND5 interfaces correspondence connection first PMOS, emitter stage and discrete pole, GND5 interfacing grounds, VE5
Interface passes through the resistance R14 being sequentially connected in series and electric capacity C21 is grounded, and VO5 interfaces connect+5V power ends and connect by resistance R15
The TXD2 interfaces of the CAN transceiving chip U4, VCC5 interfaces connection+5V power ends；
The second isolating chip U6 include NC6 interfaces, VF6+ interfaces, VF6- interfaces, NC8 interfaces, VE6 interfaces, VO6 interfaces,
GND6 interfaces and VCC6 interfaces, VF6+ interfaces connect+5V power ends by resistance R16, and VF6- interfaces connect the CAN transmitting-receiving
The RXD2 interfaces of chip U4, VF6+ interfaces and VF6- interfaces are connected in the second isolating chip U6 by the second light emitting diode
Connect, VE6 interfaces, VO6 interfaces, GND6 interfaces are connected in the second isolating chip U6 by the second PMOS, VE6 interfaces,
VO6 interfaces, the base stage of GND6 interfaces correspondence connection second PMOS, emitter stage and discrete pole, GND6 interfacing grounds, VE6
Interface passes through the resistance R17 being sequentially connected in series and electric capacity C22 is grounded, and VO6 interfaces connect+5V power ends and connect by resistance R18
RXD1 interfaces on the CAN interface chip U3, VCC6 interfaces connection+5V power ends.
4. a kind of CAN interface for vehicle-mounted mobile charging device according to claim 3, it is characterised in that：Institute
AD0~AD7 interfaces that primary processor in connection vehicle-mounted mobile charging device is additionally provided with CAN interface chip U3 are stated, and
The INT1 interfaces of the power end of+5V are connected by resistance R20.
5. a kind of CAN interface for vehicle-mounted mobile charging device according to claim 3, it is characterised in that：Institute
State to be additionally provided with CAN interface chip U3 and+5V power ends, the RX1 interfaces being grounded by resistance R19 are connected by resistance R8.
6. a kind of CAN interface for vehicle-mounted mobile charging device according to claim 3, it is characterised in that：Institute
State CAN interface chip U3 and be provided with while meeting the MODE interfaces of+5V power ends, VDD1 interfaces, VDD2 interfaces, VDD3 and connect
Mouthful, and VSS1 interfaces, VSS2 interfaces and the VSS3 interface being grounded simultaneously, it is provided with electric capacity between earth terminal and+5V power ends
C15。
7. a kind of CAN interface for vehicle-mounted mobile charging device according to claim 3, it is characterised in that：Institute
State CAN interface chip U3 and be provided with XTAL1 interfaces and XTAL2 interfaces, the XTAL1 interfaces and the XTAL2 interfaces it
Between be provided with clock circuit, the clock circuit includes that two ends connect the crystal oscillator jz2 of XTAL1 interfaces and XTAL2 interfaces respectively, and will
XTAL1 interfacing grounds, the electric capacity C16 and resistance R9 being sequentially connected in series, and by the electric capacity C17 of XTAL2 interfacing grounds.
8. a kind of CAN interface for vehicle-mounted mobile charging device according to claim 3, it is characterised in that：Institute
State CAN transceiving chip U4 be provided with TXD2 interfaces, RXD2 interfaces, VREF interfaces, RS interfaces, CANH interfaces, CANL interfaces,
VCC2 interfaces and GND2 interfaces, RS interfaces are grounded by resistance R12, and CANH interfaces are grounded by resistance R10 and electric capacity C18,
CANL interfaces are grounded by resistance R11 and electric capacity C19, VCC2 interfaces connection+5V power ends, and are grounded by electric capacity C20, GND2
Interfacing ground.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710119820.6A CN106891765A (en) | 2017-03-01 | 2017-03-01 | A kind of CAN interface for vehicle-mounted mobile charging device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710119820.6A CN106891765A (en) | 2017-03-01 | 2017-03-01 | A kind of CAN interface for vehicle-mounted mobile charging device |
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| CN106891765A true CN106891765A (en) | 2017-06-27 |
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| CN201710119820.6A Pending CN106891765A (en) | 2017-03-01 | 2017-03-01 | A kind of CAN interface for vehicle-mounted mobile charging device |
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