CN209250275U - Electric vehicle alternating-current charging interface guidance circuit - Google Patents
Electric vehicle alternating-current charging interface guidance circuit Download PDFInfo
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- CN209250275U CN209250275U CN201821821734.6U CN201821821734U CN209250275U CN 209250275 U CN209250275 U CN 209250275U CN 201821821734 U CN201821821734 U CN 201821821734U CN 209250275 U CN209250275 U CN 209250275U
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model relates to a kind of electric vehicle alternating-current charging interface guidance circuits, including microcontroller, resistance detecting circuit, electrifying control circuit, pwm signal detection circuit and voltage sampling circuit, the CC network of AC charging equipment is arranged in the input terminal connection of the resistance detecting circuit, the ADC1 pin of the output end connection microcontroller of resistance detecting circuit, the CP_EN pin of the input terminal connection microcontroller of electrifying control circuit, the CP network of AC charging equipment is arranged in the output end connection of electrifying control circuit, the input terminal of pwm signal detection circuit connects CP network, the INT pin and PWM_IN pin of the output end connection microcontroller of pwm signal detection circuit, the input terminal of voltage sampling circuit connects CP network, the output end connection microcontroller of voltage sampling circuit ADC2 pin.This guidance circuit realizes the external circuit of microcontroller by using rectifier diode, MOSFET pipe, resistance, capacitor, and cost ratio is low using operational amplifier, and high safety and reliability.
Description
Technical field
The present invention relates to cell management system of electric automobile technical fields more particularly to electric vehicle alternating-current charging interface to lead
Draw circuit.
Background technique
With getting worse for environmental pollution, and in order to reduce the dependence to non-renewable energy resources, people are gradually developed newly
Energy source and power device, such as electric car.Currently, power battery provides power as the power source of electric car for automobile, working as
Power battery electricity needs to charge by charging equipment when exhausting.According to national regulations, operating current is more than the electronic of 16A
Car charging connecting device should design control guidance circuit, and mainly adopt in the control guidance circuit of existing AC charging equipment
Circuit signal conversion is realized with operational amplifier, and circuit structure is complicated and cost of implementation is higher.
Summary of the invention
The purpose of the present invention is to provide the electric vehicle alternating-current charging interfaces of a kind of low cost, high reliability to guide electricity
Road.
To achieve the goals above, the technical solution adopted by the present invention is a kind of electric vehicle alternating-current charging interface guiding
Circuit, the guidance circuit are arranged in the battery management system of electric car, and the guidance circuit includes microcontroller, resistance inspection
The input terminal of slowdown monitoring circuit, electrifying control circuit, pwm signal detection circuit and voltage sampling circuit, the resistance detecting circuit connects
The CC network that AC charging equipment is set is connect, the ADC1 pin of the output end connection microcontroller of resistance detecting circuit powers on
The output end connection setting of the CP_EN pin of the input terminal connection microcontroller of control circuit, electrifying control circuit is filled in exchange
The CP network of electric equipment, the input terminal of pwm signal detection circuit connect CP network, the output end connection of pwm signal detection circuit
The INT pin and PWM_IN pin of microcontroller, the input terminal of voltage sampling circuit connect CP network, voltage sampling circuit it is defeated
The ADC2 pin of outlet connection microcontroller.
As an improvement of the present invention, the microcontroller inputs the electricity of ADC1 pin by sampling resistor detection circuit
Pressure identifies the current resistive value of CC network relatively, thus judge vehicle plug and vehicle socket whether secure connection,
The CP_EN pin of microcontroller exports the earth impedance that high/low level passes through electrifying control circuit real-time control CP network, exchange
Charging equipment learns the working condition of battery management system by detecting CP network voltage, can be in vehicle-mounted charging equipment standard
It is standby it is ready after notify AC charging equipment, microcontroller by pwm signal detection circuit to the pwm signal duty ratio of CP network into
Row monitoring, with real-time judge charging unit charged state and adjusts vehicle-mounted charging equipment power, microcontroller passes through voltage sample
The voltage change of circuit monitoring CP network, thus judges the working condition of AC charging equipment.
As an improvement of the present invention, the guidance circuit further includes rectification circuit, the input terminal connection of rectification circuit
CP network, the output end of rectification circuit are separately connected the input terminal of pwm signal detection circuit and voltage sampling circuit and power on
The output end of control circuit.
As an improvement of the present invention, the resistance detecting circuit includes first resistor, second resistance and 3rd resistor,
First resistor, second resistance and 3rd resistor are connected in series, and one end of first resistor connects power supply VCC, one end of 3rd resistor
Ground connection, draws input terminal of the branch as resistance detecting circuit between first resistor and second resistance, and CC is connected to the network resistance
The input terminal of detection circuit draws output end of the branch as resistance detecting circuit between second resistance and 3rd resistor,
ADC1 pin is connected to the output end of resistance detecting circuit.
As an improvement of the present invention, the pwm signal detection circuit includes the first metal-oxide-semiconductor, the 4th resistance, the 5th electricity
Resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 4th resistance, the 5th resistance, the 6th resistance are connected in series, and the one of the 4th resistance
End connection power supply VCC, the 7th resistance, the 8th resistance are connected in series, and one end of the 7th resistance is connected to the 4th resistance and the 5th electricity
Between resistance, one end of the 6th resistance and the 8th resistance is grounded, the drain electrode of the first metal-oxide-semiconductor be connected to the 4th resistance and the 5th resistance it
Between, the source electrode of the first metal-oxide-semiconductor is grounded, and the grid of the first metal-oxide-semiconductor draws the input terminal as pwm signal detection circuit, the 5th
First output end of the branch as pwm signal detection circuit is drawn between resistance and the 6th resistance, INT pin is connected to PWM letter
First output end of number detection circuit draws branch as PWM signal deteching circuit between the 7th resistance and the 8th resistance
Second output terminal, PWM_IN pin are connected to the second output terminal of pwm signal detection circuit.
As an improvement of the present invention, the rectification circuit includes rectifier diode, and the anode of rectifier diode is drawn
As the input terminal of rectification circuit, the cathode of rectifier diode draws the output end as rectification circuit, electrifying control circuit packet
The second metal-oxide-semiconductor, the tenth resistance, eleventh resistor are included, the output end as electrifying control circuit is drawn in one end of the tenth resistance,
The other end of tenth resistance is grounded, and the tenth resistance is connected in series in one end of eleventh resistor, and the other end connects the leakage of the second metal-oxide-semiconductor
Pole, the source electrode ground connection of the second metal-oxide-semiconductor, the grid of the second metal-oxide-semiconductor draw the input terminal as electrifying control circuit, upper electric control electricity
The input terminal on road connects CP_EN pin.
As an improvement of the present invention, the voltage sampling circuit includes twelfth resistor, thirteenth resistor, the 14th
The input terminal as voltage sampling circuit is drawn in resistance, one end of twelfth resistor, and twelfth resistor, thirteenth resistor series connection connect
It connecing, one end ground connection of thirteenth resistor, one end of the 14th resistance is connected between twelfth resistor and thirteenth resistor, and the tenth
The other end of four resistance draws the output end as voltage sampling circuit, and the output end of voltage sampling circuit connects ADC2 pin.
As an improvement of the present invention, the resistance detecting circuit includes the first filter capacitor, the first filter capacitor
One end is connected between second resistance and 3rd resistor, the other end ground connection of the first filter capacitor, and pwm signal detection circuit includes
Second filter capacitor and third filter capacitor, one end of the second filter capacitor are connected between the 5th resistance and the 6th resistance, the
The other end of two filter capacitors is grounded, and one end of third filter capacitor is connected between the 7th resistance and the 8th resistance, third filter
The other end of wave capacitor is grounded, and the voltage sampling circuit includes the 4th filter capacitor, the 4th filter capacitor and the 14th resistance
RC filtering in series, the other end ground connection of the 4th filter capacitor.
As an improvement of the present invention, the pwm signal detection circuit includes the 9th resistance, and one end of the 9th resistance connects
The cathode of rectifier diode is connect, the other end connects the grid of the first metal-oxide-semiconductor, and electrifying control circuit includes the 15th resistance, the tenth
Six resistance, the 15th resistance and the 16th resistance are connected in series, and one end of the 15th resistance connects the grid of the second metal-oxide-semiconductor, the
One end of 16 resistance is grounded, and branch is drawn between the 15th resistance and the 16th resistance and connects CP_EN pin.
As an improvement of the present invention, first metal-oxide-semiconductor and the second metal-oxide-semiconductor are all made of N-channel MOS FET pipe.
Compared with the existing technology, guidance circuit overall construction design proposed by the invention is ingenious, by using rectification two
Pole pipe, MOSFET pipe, resistance, capacitor realize the external circuit of microcontroller, and cost ratio is low using operational amplifier, and pacify
Full high reliablity.First metal-oxide-semiconductor of pwm signal detection circuit can effectively transmit the pwm signal of CP network-side to the electricity of rear end
Lu Zhong, and the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance has also been isolated to ten resistance, the 11st
The influence of circuit where resistance.Microcontroller exports high/low electricity according to battery management system working condition, by CP_EN pin
Flat to make the second metal-oxide-semiconductor on or off, the earth impedance of the second metal-oxide-semiconductor CP network under on and off state is different, CP letter
Number sending device (i.e. AC charging equipment) can learn the work of battery management system by detecting CP network voltage
State.Microcontroller can identify the signal frequency and duty ratio of input PWM_IN pin by pwm signal detection circuit, and can
The level change of the signal of identification input INT pin simultaneously makees corresponding signal processing.When CC network node resistance changes, CC
Network node can generate different voltage values, and microcontroller may determine that CC network relatively by the voltage sample of ADC1 pin
Current resistive value.
Detailed description of the invention
Fig. 1 is the structural block diagram of guidance circuit of the invention.
Fig. 2 is the structural block diagram of the guidance circuit comprising rectification circuit of the invention.
Fig. 3 is the circuit diagram of the guidance circuit of present pre-ferred embodiments.
Fig. 4 is the application connection figure of the guidance circuit of present pre-ferred embodiments.
Specific embodiment
In order to deepen the understanding of the present invention and recognize, the invention will be further described below in conjunction with the accompanying drawings and introduces.
It should be noticed that similar label and letter indicate similar terms in following attached drawing, once a certain Xiang Yi
It is defined in attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.In the description of the present invention,
Term " first ", " second ", " third ", " the 4th ", " the 5th " etc. are only used for distinguishing description, and should not be understood as only or imply
Relative importance.
In the description of the present invention unless specifically defined or limited otherwise, term " connected ", " connection " should do broad sense reason
Solution, for example, it may be being directly connected to, can also can be the connection inside two elements indirectly connected through an intermediary.It is right
For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As shown in Figure 1-3, the electricity of electric car is arranged in electric vehicle alternating-current charging interface guidance circuit, the guidance circuit
In the management system of pond, the guidance circuit includes microcontroller, resistance detecting circuit, electrifying control circuit, pwm signal inspection
The CC network of AC charging equipment is arranged in slowdown monitoring circuit and voltage sampling circuit, the input terminal connection of the resistance detecting circuit,
The ADC1 pin of the output end connection microcontroller of resistance detecting circuit, the input terminal of electrifying control circuit connect microcontroller
The CP network of AC charging equipment, PWM signal is arranged in the CP_EN pin of device MCU, the output end connection of electrifying control circuit
The input terminal of detection circuit connects CP network, the INT pin of the output end connection microcontroller of pwm signal detection circuit and
PWM_IN pin, the input terminal of voltage sampling circuit connect CP network, and the output end of voltage sampling circuit connects microcontroller
ADC2 pin.
Wherein, the microcontroller inputs the voltage of ADC1 pin to CC net by detection sampling resistor detection circuit
The current resistive value of network relatively identified, thus judge vehicle plug and vehicle socket whether secure connection, microcontroller
The CP_EN pin of MCU exports the earth impedance that high/low level passes through electrifying control circuit real-time control CP network, AC charging
Equipment learns the working condition of battery management system by detecting CP network voltage, can prepare just in vehicle-mounted charging equipment
Notify AC charging equipment after thread, microcontroller by pwm signal detection circuit to the pwm signal duty ratio of CP network into
Row monitoring, with real-time judge charging unit charged state and adjusts vehicle-mounted charging equipment power, microcontroller passes through voltage
Sample circuit monitors the voltage change of CP network, thus judges the working condition of AC charging equipment.
Optionally, in the present embodiment, the model SPC5744PFK1MLQ9 that the microcontroller uses.
Further, in the present embodiment, the guidance circuit further includes rectification circuit, the input terminal connection of rectification circuit
CP network, the output end of rectification circuit are separately connected the input terminal of pwm signal detection circuit and voltage sampling circuit and power on
The output end of control circuit.
Further, in the present embodiment, the resistance detecting circuit includes first resistor R1, second resistance R2 and third
Resistance R3, first resistor R1, second resistance R2 and 3rd resistor R3 are connected in series, and one end of first resistor R1 connects power supply
One end of VCC, 3rd resistor R3 are grounded, and branch is drawn between first resistor R1 and second resistance R2 as resistance detecting circuit
Input terminal, CC be connected to the network resistance detecting circuit input terminal, draw branch between second resistance R2 and 3rd resistor R3
As the output end of resistance detecting circuit, ADC1 pin is connected to the output end of resistance detecting circuit.
The input of the CC network of AC charging equipment is resistance signal, for indicating AC charging equipment connection status.When
When CC network-external does not have resistance value, power supply VCC by first resistor R1, second resistance R2 and 3rd resistor R3 divide to
ADC1 pin provides a voltage signal；And the electricity when CC network-external inputs the resistance value of different resistance values, on ADC1 pin
Pressure can change, and microcontroller is by AD sampling it is known that the state of external communication charging equipment.Therefore, when CC network section
When point resistance changes, CC network node can generate different voltage values, and microcontroller is adopted by the voltage of ADC1 pin
Sample may determine that the current resistive value of CC network relatively.
Optionally, the resistance detecting circuit includes the first filter capacitor C1, and one end of the first filter capacitor C1 is connected to
Between second resistance R2 and 3rd resistor R3, the other end of the first filter capacitor C1 is grounded.First filter capacitor C1 is for accessing
The signal of ADC1 pin is filtered to reduce interference noise.
Further, in the present embodiment, the pwm signal detection circuit include the first metal-oxide-semiconductor Q1, the 4th resistance R4,
5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6
It is connected in series, one end of the 4th resistance R4 connects power supply VCC, and the 7th resistance R7, the 8th resistance R8 are connected in series, the 7th resistance R7
One end be connected between the 4th resistance R4 and the 5th resistance R5, one end of the 6th resistance R6 and the 8th resistance R8 ground connection, first
The drain electrode of metal-oxide-semiconductor Q1 is connected between the 4th resistance R4 and the 5th resistance R5, the source electrode ground connection of the first MOS pipe Q1, the first MOS
The grid of pipe Q1 draws the input terminal as pwm signal detection circuit, and branch is drawn between the 5th resistance R5 and the 6th resistance R6
First output end of the road as pwm signal detection circuit, INT pin are connected to the first output end of pwm signal detection circuit,
Second output terminal of the branch as PWM signal deteching circuit, PWM_IN pin are drawn between 7th resistance R7 and the 8th resistance R8
It is connected to the second output terminal of pwm signal detection circuit.
Optionally, the first metal-oxide-semiconductor Q1 is managed using N-channel MOS FET.The pwm signal of CP network can control first
The on or off of metal-oxide-semiconductor Q1, then by the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 to micro-control
Device MCU processed provides signal.Microcontroller can identify PWM_IN signal frequency and duty ratio, and microcontroller can recognize
The level change of INT signal simultaneously makees corresponding signal processing.
Optionally, after the pwm signal that the first metal-oxide-semiconductor Q1 of pwm signal detection circuit can effectively transmit CP network-side arrives
In the circuit at end.Power supply VCC voltage is 12V, and microcontroller input voltage is generally 3.3V or 5V.As the first metal-oxide-semiconductor Q1
When input pwm signal is low level, power supply VCC is drawn by the 4th resistance R4, the 5th resistance R5, the 6th resistance R6 partial pressure for INT
Foot provides 5V or 3.3V input, and power supply VCC is drawn by the 4th resistance R4, the 7th resistance R7, the 8th resistance R8 partial pressure for PWM_IN
Foot provides 5V or 3.3V input.When the first metal-oxide-semiconductor Q1 input pwm signal is high level, the drain electrode end of the first metal-oxide-semiconductor Q1 is dragged down
Level, the left end of the 5th resistance R5 and the 7th resistance R7 drags down level at this time, and INT pin and PWM_IN pin are that low level is defeated
Enter.
Optionally, pwm signal detection circuit includes the second filter capacitor C2 and third filter capacitor C3, the second filter capacitor
One end of C2 is connected between the 5th resistance R5 and the 6th resistance R6, the other end ground connection of the second filter capacitor C2, third filtering
One end of capacitor C3 is connected between the 7th resistance R7 and the 8th resistance R8, the other end ground connection of third filter capacitor C3.Second
Filter capacitor C2 and third filter capacitor C3 provides decoupling and filtering for signal, to reduce noise.
Optionally, the pwm signal detection circuit includes the 9th resistance R9, one end two poles of connection rectification of the 9th resistance R9
The cathode of pipe, the other end connect the grid of the first metal-oxide-semiconductor.
Further, in the present embodiment, the rectification circuit uses rectifier diode D1, the anode of rectifier diode D1
The input terminal as rectification circuit is drawn, the cathode of rectifier diode D1 draws the output end as rectification circuit, upper electric control
Circuit includes the second metal-oxide-semiconductor Q2, the tenth resistance R10, eleventh resistor R11, and one end of the tenth resistance R10 is drawn as upper automatically controlled
The output end of circuit processed, the other end ground connection of the tenth resistance R10, the tenth resistance is connected in series in one end of eleventh resistor R11
R10, the other end connect the drain electrode of the second metal-oxide-semiconductor Q2, the source electrode ground connection of the second metal-oxide-semiconductor Q2, and the grid of the second metal-oxide-semiconductor Q2 is drawn
As the input terminal of electrifying control circuit, the input terminal of electrifying control circuit connects CP_EN pin.
Optionally, the second metal-oxide-semiconductor Q2 is managed using N-channel MOS FET.Microcontroller can pass through CP_EN pin
It exports high level and enables the second metal-oxide-semiconductor Q2, eleventh resistor R11 is shorted to ground, so that the impedance on CP to ground is electric by the tenth
Resistance R10 changes into the equivalent resistance after the tenth resistance R10 and eleventh resistor R11 parallel connection.
Optionally, microcontroller controls the input impedance of CP network by opening and closing the second metal-oxide-semiconductor Q2, the
When two metal-oxide-semiconductor Q2 are opened, the resistance value over the ground of CP network is the resistance value after the tenth resistance R10 and eleventh resistor R11 is in parallel, specifically
Adoptable resistance value is 880ohm, when the second metal-oxide-semiconductor Q2 is closed, the resistance value of the tenth resistance R10 of resistance value over the ground of CP network, and tool
The adoptable resistance value of body is 2.94Kohm.In addition, the sending-end impedance of the first metal-oxide-semiconductor Q1 is significantly larger than the tenth resistance R10 and
The resistance value of 11 resistance R11, and twelfth resistor R12's and thirteenth resistor R13 and resistance value much larger than the tenth resistance R10 and
The resistance value of eleventh resistor R11, it is thereby possible to reduce the influence to CP network impedance.
Optionally, electrifying control circuit includes the 15th resistance R15, the 16th resistance R16, the 15th resistance R15 and the
16 resistance R16 are connected in series, the grid of the second metal-oxide-semiconductor of one end connection of the 15th resistance R15, and the one of the 16th resistance R16
End ground connection draws branch between the 15th resistance R15 and the 16th resistance R16 and connects CP_EN pin.
Further, in the present embodiment, the voltage sampling circuit includes twelfth resistor R12, thirteenth resistor
The input terminal as voltage sampling circuit, twelfth resistor are drawn in R13, the 14th resistance R14, one end of twelfth resistor R12
R12, thirteenth resistor R13 are connected in series, one end of thirteenth resistor R13 ground connection, and one end of the 14th resistance R14 is connected to the
Between 12 resistance R12 and thirteenth resistor R13, the other end of the 14th resistance R14 is drawn as the defeated of voltage sampling circuit
The output end of outlet, voltage sampling circuit connects ADC2 pin.Microcontroller can be calculated according to ADC2 pin input voltage
And obtain the voltage value or its signal frequency of CP network.In actual circuit, the output voltage range of CP network-side is greater than microcontroller
The input voltage range of device MCUADC2 pin, twelfth resistor R12 and thirteenth resistor R13 are by the output voltage of CP network-side
It is divided in the acceptable input voltage range of ADC2 pin and is sampled.
Optionally, the voltage sampling circuit includes the 4th filter capacitor C4, the 4th filter capacitor C4 and the 14th resistance
R14 RC filtering in series, the other end ground connection of the 4th filter capacitor C4, and the 4th filter capacitor C4 and the 14th resistance
The connecting pin of R14 is connected with ADC2 pin, is filtered for the signal to access ADC2 pin to reduce interference noise.
According to standard GB/T/T 18487.1-2015, guidance circuit proposed by the invention is filled as electric car
The control guidance circuit of 3 connection type C of power mode, as shown in figure 4, the alternating-current charging interface that AC charging equipment passes through vehicle
Guidance circuit in the battery management system of connecting electric automobile.This circuit is applied in battery management system, basic function packet
It includes:
(1) microcontroller of connection confirmation and electronic lock, guidance circuit is calculated by measuring the voltage value of ADC1
CC network to ground resistance, to judge whether vehicle plug is fully connected with vehicle socket.After being fully connected, vehicle electric
Lock locking charging plug, charge switch are opened and are electric vehicle charging.
(2) charge ready state feedback, the microcontroller after vehicle-mounted charging equipment is ready, in guidance circuit
AC charging equipment outside MCU closure switch the second metal-oxide-semiconductor Q2 notice.
(3) AC charging equipment current-carrying capability and the identification of power supply unit output power, microcontroller pass through measurement ADC1
Voltage value resistance value and calculate the rated power of current AC charging equipment over the ground to calculate CC network.It is filled from external communication
The CP network pwm signal of electric equipment by the first metal-oxide-semiconductor Q1 of pwm signal detection circuit, the 4th resistance R4, the 5th resistance R5,
6th resistance R6, the 7th resistance R7, the 8th resistance R8 partial pressure send the INT pin and PWM_IN pin of microcontroller to, micro-
Controller MCU can judge the cut-off current of AC charging equipment by PWM duty cycle.
(4) charging process monitors, and microcontroller is to CC network to ground resistance and CP network PWM duty in charging process
Than being monitored, real-time judge AC charging equipment charge state simultaneously adjusts vehicle-mounted charging equipment power.Microcontroller is logical
The voltage magnitude of monitoring ADC2 is crossed to calculate the voltage of CP network, thus judges AC charging equipment working state.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.It should be pointed out that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (10)
1. a kind of electric vehicle alternating-current charging interface guidance circuit, it is characterised in that: electric car is arranged in the guidance circuit
In battery management system, the guidance circuit includes microcontroller, resistance detecting circuit, electrifying control circuit, pwm signal detection
The CC network of AC charging equipment, electricity is arranged in circuit and voltage sampling circuit, the input terminal connection of the resistance detecting circuit
The ADC1 pin of the output end connection microcontroller of detection circuit is hindered, the input terminal connection microcontroller of electrifying control circuit
The CP network of AC charging equipment, pwm signal detection circuit is arranged in CP_EN pin, the output end connection of electrifying control circuit
Input terminal connect CP network, pwm signal detection circuit output end connection microcontroller INT pin and PWM_IN pin,
The input terminal of voltage sampling circuit connects CP network, the ADC2 pin of the output end connection microcontroller of voltage sampling circuit.
2. electric vehicle alternating-current charging interface guidance circuit as described in claim 1, which is characterized in that the microcontroller is logical
Over-sampling resistance detecting circuit input ADC1 pin voltage the current resistive value of CC network relatively is identified, microcontroller
The CP_EN pin of device exports the earth impedance that high/low level passes through electrifying control circuit real-time control CP network, and microcontroller is logical
It crosses pwm signal detection circuit to be monitored the pwm signal duty ratio of CP network, microcontroller is monitored by voltage sampling circuit
The voltage change of CP network.
3. electric vehicle alternating-current charging interface guidance circuit as claimed in claim 2, which is characterized in that the guidance circuit is also
Including rectification circuit, the input terminal of rectification circuit connects CP network, and the output end of rectification circuit is separately connected pwm signal detection electricity
The output end of the input terminal and electrifying control circuit of road and voltage sampling circuit.
4. electric vehicle alternating-current charging interface guidance circuit as claimed in claim 3, which is characterized in that the resistance detection electricity
Road includes first resistor, second resistance and 3rd resistor, and first resistor, second resistance and 3rd resistor are connected in series, the first electricity
One end of resistance connects power supply VCC, and one end ground connection of 3rd resistor draws branch as electricity between first resistor and second resistance
The input terminal for hindering detection circuit draws output end of the branch as resistance detecting circuit between second resistance and 3rd resistor.
5. electric vehicle alternating-current charging interface guidance circuit as claimed in claim 4, which is characterized in that the pwm signal inspection
Slowdown monitoring circuit includes the first metal-oxide-semiconductor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 4th resistance, the
Five resistance, the 6th resistance are connected in series, and one end of the 4th resistance connects power supply VCC, and the 7th resistance, the 8th resistance are connected in series,
One end of 7th resistance is connected between the 4th resistance and the 5th resistance, one end ground connection of the 6th resistance and the 8th resistance, and first
The drain electrode of metal-oxide-semiconductor is connected between the 4th resistance and the 5th resistance, and the source electrode ground connection of the first metal-oxide-semiconductor, the grid of the first metal-oxide-semiconductor draws
Input terminal as pwm signal detection circuit out is drawn branch between the 5th resistance and the 6th resistance and is detected as pwm signal
First output end of circuit, INT pin are connected to the first output end of pwm signal detection circuit, in the 7th resistance and the 8th electricity
Second output terminal of the branch as pwm signal detection circuit is drawn between resistance, PWM_IN pin is connected to pwm signal detection circuit
Second output terminal.
6. electric vehicle alternating-current charging interface guidance circuit as claimed in claim 5, which is characterized in that the rectification circuit packet
Rectifier diode is included, the anode of rectifier diode draws the input terminal as rectification circuit, and the cathode of rectifier diode, which is drawn, to be made
For the output end of rectification circuit, electrifying control circuit includes the second metal-oxide-semiconductor, the tenth resistance, eleventh resistor, and the one of the tenth resistance
The output end as electrifying control circuit is drawn at end, and the other end ground connection of the tenth resistance, one end of eleventh resistor is connected in series
Tenth resistance, the other end connect the drain electrode of the second metal-oxide-semiconductor, and the source electrode ground connection of the second metal-oxide-semiconductor, the grid of the second metal-oxide-semiconductor, which is drawn, to be made
For the input terminal of electrifying control circuit.
7. electric vehicle alternating-current charging interface guidance circuit as claimed in claim 6, which is characterized in that the voltage sample electricity
Road includes twelfth resistor, thirteenth resistor, the 14th resistance, and one end of twelfth resistor is drawn as voltage sampling circuit
Input terminal, twelfth resistor, thirteenth resistor are connected in series, and one end ground connection of thirteenth resistor, one end of the 14th resistance connects
It connects between twelfth resistor and thirteenth resistor, the other end of the 14th resistance draws the output as voltage sampling circuit
End.
8. electric vehicle alternating-current charging interface guidance circuit as claimed in claim 7, which is characterized in that the resistance detection electricity
Road includes the first filter capacitor, and one end of the first filter capacitor is connected between second resistance and 3rd resistor, the first filtered electrical
The other end of appearance is grounded, and pwm signal detection circuit includes the second filter capacitor and third filter capacitor, and the one of the second filter capacitor
End is connected between the 5th resistance and the 6th resistance, and the other end ground connection of the second filter capacitor, one end of third filter capacitor connects
It connects between the 7th resistance and the 8th resistance, the other end ground connection of third filter capacitor, the voltage sampling circuit includes the 4th
Filter capacitor, the 4th filter capacitor and the 14th resistance RC in series are filtered, the other end ground connection of the 4th filter capacitor.
9. electric vehicle alternating-current charging interface guidance circuit as claimed in claim 8, which is characterized in that the pwm signal inspection
Slowdown monitoring circuit includes the 9th resistance, the cathode of one end connection rectifier diode of the 9th resistance, the grid of the other end the first metal-oxide-semiconductor of connection
Pole, electrifying control circuit include the 15th resistance, the 16th resistance, and the 15th resistance and the 16th resistance are connected in series, and the tenth
One end of five resistance connects the grid of the second metal-oxide-semiconductor, one end ground connection of the 16th resistance, in the 15th resistance and the 16th resistance
Between draw branch connect CP_EN pin.
10. electric vehicle alternating-current charging interface guidance circuit as claimed in claim 9, which is characterized in that first metal-oxide-semiconductor
N-channel MOS FET pipe is all made of with the second metal-oxide-semiconductor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821821734.6U CN209250275U (en) | 2018-11-07 | 2018-11-07 | Electric vehicle alternating-current charging interface guidance circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821821734.6U CN209250275U (en) | 2018-11-07 | 2018-11-07 | Electric vehicle alternating-current charging interface guidance circuit |
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| CN209250275U true CN209250275U (en) | 2019-08-13 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428369A (en) * | 2018-11-07 | 2019-03-05 | 延锋伟世通电子科技（南京）有限公司 | Electric vehicle alternating-current charging interface guidance circuit |
| CN110539661A (en) * | 2019-09-18 | 2019-12-06 | 江苏华鹏智能仪表科技股份有限公司 | Alternating current charging equipment CP control guide signal driving and collecting circuit |
-
2018
- 2018-11-07 CN CN201821821734.6U patent/CN209250275U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428369A (en) * | 2018-11-07 | 2019-03-05 | 延锋伟世通电子科技（南京）有限公司 | Electric vehicle alternating-current charging interface guidance circuit |
| CN109428369B (en) * | 2018-11-07 | 2024-02-20 | 延锋伟世通电子科技（南京）有限公司 | Alternating-current charging interface guide circuit of electric automobile |
| CN110539661A (en) * | 2019-09-18 | 2019-12-06 | 江苏华鹏智能仪表科技股份有限公司 | Alternating current charging equipment CP control guide signal driving and collecting circuit |
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