CN104037841A - Charging control guidance method used for electric vehicle alternating current charging pile - Google Patents
Charging control guidance method used for electric vehicle alternating current charging pile Download PDFInfo
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Abstract
The invention discloses a charging control guidance method used for an electric vehicle alternating current charging pile. The charging control guidance method comprises the following steps that: 1) a PWM adjustment module is controlled to output electric signals, a user inputs an instruction to start charging control guidance; 2) the PWM adjustment module is controlled to output signals for a preset time period, the duty ratio of the signals being a fixed set value, and the amplitude and duty cycle of output signals of a CP end are detected through a detection module; 3) if detected signals accord with the fixed set value, whether self check is successful is judged, and charging connection is performed, otherwise, feedback is given to a master station, and the method is prohibited from entering a next step; 4) a charging guidance controller detects the connection state of a charging interface at a power supplying position, and whether the charging interface at the power supplying position is connected is judged, and if the charging interface is successfully connected, the method enters a next step; and 5) the PWM adjustment module is controlled to output correspondingly set signals, and the detection module detects the width of output digital pulses of a detection point 1 through the detection module, so that the positive voltage amplitude of PWM wave signals can be modulated, and whether a charging connection device is fully connected is judged, and whether vehicle-mounted charging control equipment is ready is judged.
Description
The invention is that the patent No. based on submitting on July 31st, 2012 is 201210271432.7, name is called dividing an application of " guiding module and guidance method thereof being controlled in the charging for electric vehicle alternating-current charging pile ", and the partial content in its specification is to be incorporated herein by reference.
Technical field
The present invention relates to electric automobile and discharge and recharge technology, in more specific words it, the present invention relates to the charging control guidance method that guiding module is controlled in a kind of charging for electric vehicle alternating-current charging pile.
Background technology
Along with day by day popularizing of electric automobile, charging system for electric automobile is being paid close attention to by more people gradually also, the problem that need to consider when automobile being carried out to conduction-type charging is: before using charging inlet to charge, need to first confirm whether be reliably connected with detection charging inlet, under not connecting completely, not carry out the personnel's Danger Electric shock risk that causes easy to charge; In charging process, the PwM guiding ripple that power supply place need to be exported certain duty ratio by charging inlet is controlled Vehicular charger, according to electrical network load, can adjust in real time waveform duty cycle to regulate charging current, the connection status of Real-Time Monitoring output waveform and charging inlet, should cut off power supply immediately once there are abnormal conditions simultaneously.China has released the national standard of electric automobile conduction-type charging connecting device alternating-current charging interface, wherein charging is controlled to leader and explicitly calls for.
The recommended parameter of charging guiding is as shown in Table:
| parameter * | symbol | unit | nominal value | maximum | minimum value |
| output HIGH voltage | + V cC | v | 12.00 | 12.60 | 11.40 |
| output LOW voltage | -V cC | v | -12.00 | -12.60 | -11.40 |
| output frequency | f | hz | 1000.00 | 1030.00 | 970.00 |
| output duty cycle | d c. | -- | -- | + 1% | -1% |
| the signal setting time b | ts | μ s | n.a. | 3 | n.a. |
| signal elevating time (10%～90%) | tr | μ s | n.a. | 2 | n.a. |
| signal fall time (90%～10%) | tf | μ s | n.a. | 2 | n.a. |
Chinese patent CN102487208 discloses a kind of for charging electric vehicle control guiding module, adopts by " recommending " export structure driver output PWM ripple.The weak point of this scheme is: 1, edge time of PWM waveform of output grow (junction capacitance restriction), and recommends while exporting and cause exporting easy generation overshoot burr because inputting the positive and negative switching of waveform; 2, the generating positive and negative voltage of output waveform is power supply voltage, and this is higher to the precision of supply voltage and stability requirement, causes power supply cost to increase.
Summary of the invention
The present invention is intended to solve the defect existing in prior art, and a kind of national standard designing requirement, simple and practical control guiding module scheme of at least meeting is provided.In this programme, the three terminal regulator of high accuracy, Low Drift Temperature is as a reference source of the voltage reference block of the positive and negative power supply of operational amplifier, guaranteed precision and the temperature stability of generating positive and negative voltage amplitude of the PWM ripple of its output, can allow like this power supply to have larger trueness error scope, reduce power supply required precision; The operational amplifier of high pressure Slew Rate, low-power consumption is as the core devices of level conversion, and the PWM waveform quality of output is higher, and stability is better, meets standard design requirement.
In order to realize above-mentioned purpose of design, design 1 of the present invention: design a kind of charging for electric vehicle alternating-current charging pile and control guiding module, it by positive voltage referrer module, negative voltage referrer module, level switch module, module is followed in output and detection module forms.In the compatible electric vehicle charging jockey national standard (electric automobile conduction-type charging connecting device alternating-current charging interface GBT20234.2-2011) of these modules and State Grid Corporation of China, Southern Power Grid Company relevant enterprise standard, to controlling the design parameter requirement of guiding module, especially meet frequency, amplitude, duty ratio precision and the isoparametric requirement of edge time to guiding PWM waveform.
Simultaneously, this control guiding module can be in operating temperature range the equal PWM waveform of preferably ± 12V of stable output, reliable and voltage accuracy and waveform quality, and can be easier to realize output wave is carried out to real-time synchronization detection, this module is simple and practical, has higher cost performance.
In order to realize above-mentioned purpose of design, design 2 of the present invention: design a kind of charging for electric vehicle alternating-current charging pile and control guiding module, it is followed module, detection module and a charging guidance controller by positive voltage referrer module, negative voltage referrer module, level switch module, output and forms, it controls the control core of guiding module as charging, for startup, finishing control guiding flow process, sampling and processing detection signal, control and regulate the output PWM ripple duty ratio of PWM adjusting module, indicate and feed back fault message to equipment such as backstage main websites.
Design 1 of the present invention: guiding module is controlled in the charging for electric vehicle alternating-current charging pile, and it comprises:
Positive voltage referrer module, for first supply voltage is adjusted into preset value, and as the anodal supply power voltage of operational amplifier and adjust its output saturation positive voltage;
Negative voltage referrer module, for a second source voltage is adjusted into preset value, and as the negative pole supply power voltage of operational amplifier and adjust its output saturation negative voltage;
Level switch module, it and described positive voltage referrer module, negative voltage referrer module, the first supply voltage and a PWM adjusting module are connected, the reference voltage of exporting for the divider resistance that receives the digital pulsewidth modulation pwm signal of described PWM adjusting module output and be connected with described the first supply voltage, and described digital pulsewidth modulation pwm signal and reference voltage are compared, according to compared result, the digital pulsewidth modulation pwm signal of input is converted to the PWM output signal that amplitude equals the saturated output voltage of described operational amplifier subsequently,
Module is followed in output, described output is followed module and is connected with described the first supply voltage, second source voltage and level switch module, for following the PWM output signal that described level switch module is exported, and the amplitude of described output PWM output signal is remained unchanged in the connection procedure that charges; And
Detection module, it is followed module with described the first supply voltage with output and is connected, for first judge the connection status of power supply place charging inlet according to the output voltage of the other end of the resistance being connected with described the first supply voltage, again according to the positive voltage amplitude judgement connection status of electric vehicle charge interface and the standby condition of charging device of the output wave at test point I place, at described detection module, judge that described power supply place or electric automobile place charging inlet be not when connecting, or charging inlet has connected but charging device when not ready, cuts off or forbid the power supply of power supply place.
Further, in a preferred embodiment of the invention, described positive voltage referrer module further comprises: the first resistance, the second resistance, the first three terminal regulator and the first adjustable resistance, wherein
One end of described the first resistance is connected with described the first supply voltage, and the other end of described the first resistance is connected with the first three terminal regulator and with the second resistance; The first end of described the first three terminal regulator is connected with described the first resistance and described the second resistance, the second end ground connection of described the first three terminal regulator, and the 3rd end of described the first three terminal regulator is connected with described the second resistance and the first adjustable resistance first end; The other end of described the second resistance is connected with described the first adjustable resistance first end; The second end ground connection of described the first adjustable resistance, the 3rd end of described the first adjustable resistance and the first end of described the first adjustable resistance or the second end short circuit.
Further, in a preferred embodiment of the invention, described negative voltage referrer module further comprises: the 3rd resistance, the 4th resistance, the second three terminal regulator and the second adjustable resistance, wherein
One end of described the 3rd resistance is connected with described second source voltage, and the other end of described the 3rd resistance is connected with the second end of the second three terminal regulator and the second end of the second adjustable resistance;
The first end ground connection of described the second three terminal regulator, the second end is connected with second adjustable resistance the second end, and the 3rd end is connected with described the second adjustable resistance first end and the 4th resistance;
The second end of described the second adjustable resistance is connected with the second end of described the second three terminal regulator, the 3rd end of described the second adjustable resistance and the first end of described the second adjustable resistance or the second end short circuit;
One end ground connection of described the 4th resistance, the other end is connected with described the second adjustable resistance first end.
Further, in a preferred embodiment of the invention, described level switch module further comprises: the 5th resistance, the 6th resistance and the first operational amplifier, wherein
One end of described the 5th resistance is connected with the first supply voltage, and the other end is connected with the 6th resistance and the first operational amplifier the 3rd input;
One end ground connection of described the 6th resistance, the other end is connected with operational amplifier the 3rd input;
The second input of described the first operational amplifier is connected with the output of PWM adjusting module, four-input terminal is connected with described negative voltage referrer module, the 7th input is connected with described positive voltage referrer module, and the 6th output of described the first operational amplifier is followed module with described output and is connected.
Further, in a preferred embodiment of the invention, be made as+15V of the magnitude of voltage of described the first supply voltage, be made as-15V of the magnitude of voltage of second source voltage.
Further, in a preferred embodiment of the invention:
When the input voltage of the second input of described the first operational amplifier is less than reference voltage, the knob that regulates described the first adjustable resistance is to the 6th output output voltage of described the first operational amplifier to+12V; Or
When the input voltage of the second input of described the first operational amplifier is greater than reference voltage, the knob that regulates described the second adjustable resistance is to the 6th output output voltage of described the first operational amplifier to-12V.
Further, in a preferred embodiment of the invention:
When the amplitude of described digital pulsewidth modulation pwm signal is less than described reference voltage, the high level output signal of the 6th output output+12V of described the first operational amplifier; Or
When the amplitude of described digital PWM ripple is greater than described reference voltage, the low-level output signal of the 6th output output-12V of described the first operational amplifier.
Further, in a preferred embodiment of the invention, described output is followed module and is further comprised: the 7th resistance, the 8th resistance and the second operational amplifier, wherein
The second input of described the second operational amplifier is connected with the 8th resistance, and the 3rd input is connected with the 7th resistance, and the 6th output is connected with the 8th resistance other end; Described the 7th resistance one end is connected with described level switch module.
Further, in a preferred embodiment of the invention, described detection module further comprises the 11 resistance, and one end of described the 11 resistance is connected with described the first supply voltage, and the other end of described the 11 resistance is connected with the CC line in charging inlet.
Further, in a preferred embodiment of the invention:
If the output voltage of described the 11 resistance is+15V, the charging inlet that judges described power supply place does not connect, cut off or forbid the power supply of power supply place, simultaneously, described PWM adjusts output module output lower than the low level signal of described reference voltage, and after module is followed in level switch module and output, the high level signal of generation+12V exports charging inlet to;
If the output voltage of described the 11 resistance is 0V, the charging inlet that judges described power supply place connects, meanwhile, described PWM adjusts output module output digital PWM signal, and the PWM ripple signal that to produce amplitude after module is followed in level switch module and output be ± 12V exports charging inlet to;
If the positive voltage amplitude of the output wave at described test point 1 place is 9V, the charging inlet that judges electric automobile has connected but the charging device of electric automobile is not ready, cuts off or forbid the power supply of power supply place;
If the positive voltage amplitude of the output wave at described test point 1 place is 6V, the charging inlet that judges electric automobile connected and the charging device of electric automobile ready, charging is carried out in power supply place.
Design 2 of the present invention: guiding module is controlled in the charging for electric vehicle alternating-current charging pile, and it comprises:
Positive voltage referrer module, for first supply voltage is adjusted into preset value, and as the anodal supply power voltage of operational amplifier and adjust its output saturation positive voltage;
Negative voltage referrer module, for a second source voltage is adjusted into preset value, and as the negative pole supply power voltage of operational amplifier and adjust its output saturation negative voltage;
Level switch module, it and described positive voltage referrer module, negative voltage referrer module, the first supply voltage and a PWM adjusting module are connected, the reference voltage of exporting for the divider resistance that receives the digital pulsewidth modulation pwm signal of described PWM adjusting module output and be connected with described the first supply voltage, and described digital pulsewidth modulation pwm signal and reference voltage are compared, according to compared result, the digital pulsewidth modulation pwm signal of input is converted to the PWM output signal that amplitude equals the saturated output voltage of described operational amplifier subsequently,
Module is followed in output, described output is followed module and is connected with described the first supply voltage, second source voltage and level switch module, for following the PWM output signal that described level switch module is exported, and the amplitude of described output PWM output signal is remained unchanged in the connection procedure that charges;
Detection module, it is followed module with described the first supply voltage with output and is connected, for first judge the connection status of power supply place charging inlet according to the output voltage of the other end of the resistance being connected with described the first supply voltage, again according to the positive voltage amplitude judgement connection status of electric vehicle charge interface and the standby condition of charging device of the output wave at test point I place, at described detection module, judge that described power supply place or electric automobile place charging inlet be not when connecting, or charging inlet has connected but charging device when not ready, cuts off or forbid the power supply of power supply place; And
Charging guidance controller, it is connected with PWM adjusting module with described detection module, for starting and finishing control guiding, sampling and processing detection signal, control and regulate the duty ratio of the digital pulsewidth modulation pwm signal of PWM adjusting module output, and indication and feedback fault message Zhi Yige backstage main website.
Further, in a preferred embodiment of the invention, the guidance method of controlling guiding module according to the aforesaid charging that is applied to electric vehicle alternating-current charging pile comprises the following steps:
1) charging control guiding module carries out self check:
Charging guidance controller is controlled PWM adjusting module output low level signal, and through level switch module with after following output module processing, output+12V voltage is to " test point 1 " (CP end), and after user inputs charging instruction, guiding is controlled in startup charging;
2) connection status that guiding module detects power supply place charging inlet is controlled in charging:
The output duty cycle that described charging guidance controller is controlled PWM adjusting module is the fixing digital pulsewidth modulation PWM ripple signal of set point, then amplitude and the duty ratio of the digital pulsewidth modulation PWM ripple signal of exporting by described detection module sample detecting " test point 1 " (CP end);
3) connection status that guiding module detects electric vehicle charge interface place is controlled in charging:
Described charging guidance controller is controlled PWM adjusting module output low level signal, through level switch module and follow output module process after output+12V voltage to " test point 1 " (CP end), if to be 12V and duty ratio conform to fixing set point the amplitude of digital pulsewidth modulation PWM ripple signal described in self check, further judge self check by and the connection of charging, otherwise feedback fail self-test fault message is to backstage main website and be prohibited from entering next step;
4) charging guidance controller detects power supply place charging inlet connection status:
The voltage that detects " test point 4 " (CC end), judges whether power supply place charging inlet connects, if do not connect, waits for a Preset Time; If connect, enter next step;
5) charging control guiding module detects the connection status at the charging inlet place of electric automobile:
The digital pulsewidth modulation PWM ripple signal of the duty ratio of the charging current that described charging guidance controller control PWM adjusting module output respective user or system arrange, the positive voltage amplitude of the output digital pulsewidth modulation PWM ripple signal by described detection module sample detecting " test point 1 " (CP end), and further judge whether charging connecting device connects completely and whether vehicle-mounted charge control appliance is ready.
Further, in a preferred embodiment of the invention, in step 5) in, if the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) is 12V, charging connecting device does not connect completely;
If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) is 9V, charging connecting device connects completely, but vehicle-mounted charge control appliance is not ready;
If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) is 6V, charging connecting device connect completely and vehicle-mounted charge control appliance ready, power supply place charging inlet carries out charging.
Further, in a preferred embodiment of the invention, comprise step: in charging process, periodically detect the positive voltage amplitude of digital pulsewidth modulation PWM ripple signal and the voltage of " test point 4 " (CC end) of " test point 1 " (CP end), to judge connection status and the charging done state of charging inlet.
Further, in a preferred embodiment of the invention, if described charging inlet detected, there is disconnecting, cut off charging finishing control guiding; If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) is 9V by 6V saltus step, judge that charging finishes, cut off power supply finishing control guiding.
Further, in a preferred embodiment of the invention, when reaching the termination condition of vehicle set, or operating personnel are while having carried out stopping the instruction of charging, stop controlling guiding, and disconnect the charging of power supply place charging inlet; Or
When electric vehicle alternating-current charging pile detects charging, connect disconnection completely and keep continuously 300ms, stopping controlling the charging of guiding and disconnect power supply place charging inlet.
Accompanying drawing explanation
The preferred embodiment of the present invention is by below with the detailed description in addition of the mode with reference to accompanying drawing, wherein
Fig. 1 is the charge principle schematic of the first embodiment of controlling guiding module of the present invention;
Fig. 2 is the charge principle schematic of the second embodiment of controlling guiding module of the present invention;
Fig. 3 is annexation and the control principle schematic diagram between electric vehicle alternating-current charging pile of the present invention and electric automobile.
Embodiment
Embodiment 1:
With reference to Fig. 1, the present invention controls the first embodiment of guiding module for the charging of electric vehicle alternating-current charging pile, and it comprises:
Positive voltage referrer module 1, it is for first supply voltage is adjusted into preset value, and as the anodal supply power voltage of operational amplifier U1 and adjust its output saturation positive voltage;
Negative voltage referrer module 2, for a second source voltage is adjusted into preset value, and as the negative pole supply power voltage of operational amplifier U1 and adjust its output saturation negative voltage;
Level switch module 3, it and positive voltage referrer module 1, negative voltage referrer module 2, the first supply voltage and a PWM adjusting module 7 are connected, the reference voltage of exporting for the divider resistance that receives the digital pulsewidth modulation pwm signal of described PWM adjusting module 7 outputs and be connected with described the first supply voltage, and described digital pulsewidth modulation pwm signal and reference voltage are compared, according to compared result, the digital pulsewidth modulation pwm signal of input is converted to the PWM output signal that amplitude equals the saturated output voltage of described operational amplifier subsequently,
Module 4 is followed in output, described output is followed module and is connected with described the first supply voltage, second source voltage and level switch module 3, for following the PWM output signal that described level switch module 3 is exported, and the amplitude of described output PWM output signal is remained unchanged in the connection procedure that charges; And
Detection module 5, it is followed module 4 with described the first supply voltage and output and is connected, for first judge the connection status of power supply place charging inlet according to the output voltage of the other end of the resistance being connected with described the first supply voltage, the positive voltage amplitude judgement connection status of electric vehicle charge interface and the standby condition of charging device of the output wave of locating according to " test point I " again, at described detection module, judge that described power supply place or electric automobile place charging inlet be not when connecting, or charging inlet has connected but charging device when not ready, cut off or forbid the power supply of power supply place.
Further, in a preferred embodiment of the invention, positive voltage referrer module 1 further comprises: the first resistance R 1, the second resistance R 2, the first three terminal regulator D1 and the first adjustable resistance RP1, wherein
One end of described the first resistance R 1 is connected with described the first supply voltage, and the other end of described the first resistance R 1 is connected with the first three terminal regulator D1 and with the second resistance R 2; The first end of described the first three terminal regulator D1 is connected with described the first resistance R 1 and described the second resistance R 2, the second end ground connection of described the first three terminal regulator D1, the 3rd end of described the first three terminal regulator D1 is connected with described the second resistance R 2 and the first adjustable resistance RP1 first end; The other end of described the second resistance R 2 is connected with described the first adjustable resistance RP1 first end; The second end ground connection of described the first adjustable resistance RP1, the 3rd end of described the first adjustable resistance RP1 and the first end of described the first adjustable resistance RP1 or the second end short circuit.
Further, in a preferred embodiment of the invention, negative voltage referrer module 2 further comprises: the 3rd resistance R 3, the 4th resistance R 4, the second three terminal regulator D2 and the second adjustable resistance RP2, wherein
One end of described the 3rd resistance R 3 is connected with described second source voltage, and the other end of described the 3rd resistance R 3 is connected with the second end of the second three terminal regulator D2 and the second end of the second adjustable resistance RP2;
The first end ground connection of described the second three terminal regulator D2, the second end is connected with second adjustable resistance RP2 the second end, and the 3rd end is connected with described the second adjustable resistance RP2 first end and the 4th resistance R 4;
The second end of described the second adjustable resistance RP2 is connected with the second end of described the second three terminal regulator D2, the 3rd end of described the second adjustable resistance RP2 and the first end of described the second adjustable resistance RP2 or the second end short circuit;
One end ground connection of described the 4th resistance R 4, the other end is connected with described the second adjustable resistance RP2 first end.
Further, in a preferred embodiment of the invention, level switch module 3 further comprises: the 5th resistance R 5, the 6th resistance R 6 and the first operational amplifier U1, wherein
One end of described the 5th resistance R 5 is connected with the first supply voltage, and the other end is connected with the 6th resistance R 6 and the first operational amplifier U1 the 3rd input;
One end ground connection of described the 6th resistance R 6, the other end is connected with operational amplifier U1 the 3rd input;
The second input of described the first operational amplifier U1 is connected with the output of PWM adjusting module 7, four-input terminal is connected with described negative voltage referrer module 2, the 7th input is connected with described positive voltage referrer module 1, and the 6th output and the described output of described the first operational amplifier U1 are followed module 4 and is connected.
Further, in a preferred embodiment of the invention, be made as+15V of the magnitude of voltage of described the first supply voltage, be made as-15V of the magnitude of voltage of second source voltage.
Further, in a preferred embodiment of the invention:
When the input voltage of the second input of described the first operational amplifier U1 is less than reference voltage, the knob that regulates described the first adjustable resistance RP1 is to the 6th output output voltage of described the first operational amplifier U1 to+12V; Or
When the input voltage of the second input of described the first operational amplifier U1 is greater than reference voltage, the knob that regulates described the second adjustable resistance RP2 is to the 6th output output voltage of described the first operational amplifier to-12V.
Further, in a preferred embodiment of the invention:
When the amplitude of described digital pulsewidth modulation pwm signal is less than described reference voltage, the high level output signal of the 6th output output+12V of described the first operational amplifier U1; Or
When the amplitude of described digital pulsewidth modulation pwm signal is greater than described reference voltage, the low-level output signal of the 6th output output-12V of described the first operational amplifier U1.
Further, in a preferred embodiment of the invention, output is followed module 4 and is further comprised: the 7th resistance R 7, the 8th resistance R 8 and the second operational amplifier U2, wherein
The second input of described the second operational amplifier U2 is connected with the 8th resistance R 8, and the 3rd input is connected with the 7th resistance R 7, and the 6th output is connected with the 8th resistance R 8 other ends; Described the 7th resistance R 7 one end are connected with described level switch module 3.
Further, in a preferred embodiment of the invention, detection module 5 further comprises the 11 resistance R 11, and one end of described the 11 resistance R 11 is connected with described the first supply voltage, and the CC line in described the 11 other end of resistance R 11 and the charging inlet of power supply place is connected.
Further, in a preferred embodiment of the invention:
If the output voltage of described the 11 resistance R 11 is+15V, the charging inlet that judges described power supply place does not connect, cut off or forbid the power supply of power supply place, simultaneously, described PWM adjusts output module 7 outputs lower than the low level signal of described reference voltage, and after module 4 is followed in level switch module 3 and output, the high level signal of generation+12V exports charging inlet to;
If the output voltage of described the 11 resistance R 11 is 0V, the charging inlet that judges described power supply place connects, simultaneously, described PWM adjusts output module 7 output digital PWM signals, and the PWM ripple signal that to produce amplitude after module 4 is followed in level switch module 3 and output be ± 12V exports charging inlet to;
If the positive voltage amplitude of the output wave at described test point 1 place is 9V, the charging inlet that judges electric automobile has connected but the charging device of electric automobile is not ready, cuts off or forbid the power supply of power supply place;
If the positive voltage amplitude of the output wave at described test point 1 place is 6V, the charging inlet that judges electric automobile connected and the charging device of electric automobile ready, charging is carried out in power supply place.
Embodiment 2:
Guiding module is controlled in charging for electric vehicle alternating-current charging pile, and it comprises:
Positive voltage referrer module 1, for first supply voltage is adjusted into preset value, and as the anodal supply power voltage of operational amplifier and adjust its output saturation positive voltage;
Negative voltage referrer module 2, for a second source voltage is adjusted into preset value, and as the negative pole supply power voltage of operational amplifier and adjust its output saturation negative voltage;
Level switch module 3, it and described positive voltage referrer module, negative voltage referrer module, the first supply voltage and a PWM adjusting module 7 are connected, the reference voltage of exporting for the divider resistance that receives the digital pulsewidth modulation pwm signal of described PWM adjusting module 7 outputs and be connected with described the first supply voltage, and described digital pulsewidth modulation pwm signal and reference voltage are compared, according to compared result, the digital pulsewidth modulation pwm signal of input is converted to the PWM output signal that amplitude equals the saturated output voltage of described operational amplifier subsequently,
Module 4 is followed in output, described output is followed module and is connected with described the first supply voltage, second source voltage and level switch module, for following the PWM output signal that described level switch module is exported, and the amplitude of described output PWM output signal is remained unchanged in the connection procedure that charges;
Detection module 5, it is followed module 4 with described the first supply voltage and output and is connected, for first judge the connection status of power supply place charging inlet according to the output voltage of the other end of the resistance being connected with described the first supply voltage, again according to the positive voltage amplitude judgement connection status of electric vehicle charge interface and the standby condition of charging device of the output wave at test point I place, at described detection module, judge that described power supply place or electric automobile place charging inlet be not when connecting, or charging inlet has connected but charging device when not ready, cut off or forbid the power supply of power supply place, and
Charging guidance controller 6, it is connected with PWM adjusting module 7 with described detection module 5, for starting and finishing control guiding, sampling and processing detection signal, control and regulate the duty ratio of the digital pulsewidth modulation pwm signal of PWM adjusting module 7 outputs, and indication and feedback fault message Zhi Yige backstage main website.
With reference to Fig. 3, in another preferred embodiment of the present invention, the guidance method of controlling guiding module according to the aforesaid charging that is applied to electric vehicle alternating-current charging pile comprises the following steps further:
1) charging control guiding module carries out self check:
Power supply control apparatus 110 has comprised charging control guiding module, charging guidance controller is controlled PWM adjusting module output low level signal, through level switch module with after following output module processing, output+12V voltage is to " test point 1 " (CP end), and after user inputs charging instruction, starting charges controls guiding.
In a preferred embodiment of the invention, charging guidance controller 6 is adjusted to S0 end by a controllable switch S 1, now be output as one+12V voltage signal, the loop I that this voltage signal indicates through arrow in illustrating is to " test point 1 " (CP end), then be back to charging and control guiding module 110, now confirm that module 110 self checks are normal, can start module 110.
2) connection status that guiding module detects power supply place charging inlet is controlled in charging:
The output duty cycle that described charging guidance controller 6 is controlled PWM adjusting modules is the fixing digital pulsewidth modulation PWM ripple signal of set point, then amplitude and the duty ratio of the digital pulsewidth modulation PWM ripple signal of exporting by described detection module sample detecting " test point 1 " (CP end).
In a preferred embodiment of the invention, charging guidance controller 6 is adjusted to PWM end by controllable switch S 1, now further detects amplitude and the duty ratio of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) output.
3) connection status that guiding module detects electric vehicle charge interface 200 places is controlled in charging:
Described charging guidance controller is controlled PWM adjusting module output low level signal, through level switch module and follow output module process after output+12V voltage to " test point 1 " (CP end), if to be 12V and duty ratio conform to fixing set point the amplitude of digital pulsewidth modulation PWM ripple signal described in self check, further judge self check by and the connection of charging, otherwise feedback fail self-test fault message is to backstage main website and be prohibited from entering next step;
4) charging guidance controller 6 detects power supply place charging inlet connection status:
The voltage that detects " test point 4 " (CC end), judges whether power supply place charging inlet connects, if do not connect, waits for a Preset Time; With reference to the loop II in Fig. 3, charging is controlled detection signal of guiding module 110 outputs to " test point 4 " and is held to CC, hold to PE, until earth terminal AGND safety ground, the voltage that now detects " test point 4 " (CC end) just can learn whether charging inlet loop is normally connected, if connect, enter next step;
5) charging control guiding module detects the connection status at charging inlet 300 places of electric automobile 400:
With reference to loop III, the digital pulsewidth modulation PWM ripple signal of the duty ratio of the charging current that described charging guidance controller control PWM adjusting module output respective user or system arrange, the positive voltage amplitude of the output digital pulsewidth modulation PWM ripple signal by described detection module sample detecting " test point 1 " (CP end), and further judge whether charging connecting device connects completely and whether vehicle-mounted charge control appliance is ready.
Further, in another preferred embodiment of the present invention, also comprise the step that detects the connection status in electric automobile 400.If the Vehicular charger of the electric automobile 400 in diagram normally connects, be that above step is when all normally realize, the detection voltage magnitude of " test point 1 " so (CP end) should be 6V, now Vehicular charger is connected to electric network power line L and N, K switch 1 and K2 are closed, carry out normal vehicle-mounted charge.
In this step, charging guidance controller 6 is controlled the size of charging current by PWM adjusting module, guarantee the normal variation of charging current.
Further, in a preferred embodiment of the invention, in step 5) in, if the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) is 12V, charging connecting device does not connect completely;
If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) is 9V, charging connecting device connects completely, but vehicle-mounted charge control appliance is not ready;
If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) is 6V, charging connecting device connect completely and vehicle-mounted charge control appliance ready, power supply place charging inlet carries out charging.
Further, in a preferred embodiment of the invention, comprise step: in charging process, periodically detect the positive voltage amplitude of digital pulsewidth modulation PWM ripple signal and the voltage of " test point 4 " (CC end) of " test point 1 " (CP end), to judge connection status and the charging done state of charging inlet.
Further, in a preferred embodiment of the invention, if described charging inlet detected, there is disconnecting, cut off charging finishing control guiding; If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of " test point 1 " (CP end) is 9V by 6V saltus step, judge that charging finishes, cut off power supply finishing control guiding.
Further, in a preferred embodiment of the invention, when reaching the termination condition of vehicle set, or operating personnel are while having carried out stopping the instruction of charging, stop controlling guiding, and disconnect the charging of power supply place charging inlet; Or
When electric vehicle alternating-current charging pile detects charging, connect disconnection completely and keep continuously 300ms, stopping controlling the charging of guiding and disconnect power supply place charging inlet.
These are only the preferred embodiment of the present invention, be intended to embody outstanding technique effect of the present invention and advantage, is not the restriction to technical scheme of the present invention.Those skilled in the art will appreciate that all modifications of making based on the technology of the present invention content, variation or substitute technology feature, all should be covered by the technology category of claims opinion of the present invention.
Claims (6)
1. for the charging of electric vehicle alternating-current charging pile, control guidance method, described charging is controlled guiding module and is comprised:
Positive voltage referrer module, for first supply voltage is adjusted into preset value, and as the anodal supply power voltage of operational amplifier and adjust its output saturation positive voltage;
Negative voltage referrer module, for a second source voltage is adjusted into preset value, and as the negative pole supply power voltage of operational amplifier and adjust its output saturation negative voltage;
Level switch module, it and described positive voltage referrer module, negative voltage referrer module, the first supply voltage and a PWM adjusting module are connected, the reference voltage of exporting for the divider resistance that receives the digital pulsewidth modulation pwm signal of described PWM adjusting module output and be connected with described the first supply voltage, and described digital pulsewidth modulation pwm signal and reference voltage are compared, according to compared result, the digital pulsewidth modulation pwm signal of input is converted to the PWM output signal that amplitude equals the saturated output voltage of described operational amplifier subsequently,
Module is followed in output, described output is followed module and is connected with described the first supply voltage, second source voltage and level switch module, for following the PWM output signal that described level switch module is exported, and the amplitude of described output PWM output signal is remained unchanged in the connection procedure that charges;
Detection module, it is followed module with described the first supply voltage with output and is connected, for first judge the connection status of power supply place charging inlet according to the output voltage of the other end of the resistance being connected with described the first supply voltage, the positive voltage amplitude judgement connection status of electric vehicle charge interface and the standby condition of charging device of the output wave of locating according to a test point I (charging plug CP end) again, at described detection module, judge that described power supply place or electric automobile place charging inlet be not when connecting, or charging inlet has connected but charging device when not ready, cut off or forbid the power supply of power supply place, and
Charging guidance controller, it is connected with PWM adjusting module with detection module, for starting and finishing control guiding, sampling and processing detection signal, control and regulate the duty ratio of the digital pulsewidth modulation pwm signal of PWM adjusting module output, and indication and feedback fault message Zhi Yige backstage main website, wherein said detection module further comprises the 11 resistance, one end of described the 11 resistance is connected with the first supply voltage, the other end of described the 11 resistance is connected with the CC end in power supply place charging inlet, it is characterized in that comprising step:
1) charging guidance controller is controlled PWM adjusting module output low level signal, through level switch module and follow output module process after output+12V voltage hold to CP, after user inputs charging instruction, start charging and control and guide;
2) described charging guidance controller is controlled digital pulsewidth modulation PWM ripple signal the lasting Preset Time section that PWM adjusting module output duty cycle is fixedly set point, amplitude and the duty ratio of by described detection module sample detecting CP, holding the digital pulsewidth modulation PWM ripple signal of output;
3) described charging guidance controller is controlled PWM adjusting module output low level signal, after resume module is followed in level switch module and output, output+12V voltage is held to CP, if being 12V and duty ratio, the amplitude of measured digital pulsewidth modulation PWM ripple signal conforms to fixing set point, further judge self check by and the connection of charging, otherwise feedback fail self-test fault message is to backstage main website and be prohibited from entering next step;
4) described charging guidance controller detects power supply place charging inlet connection status: detect the voltage of test point 4 (charging plug CC end), judge whether power supply place charging inlet connects, if do not connect, wait for a Preset Time; If connect, enter next step;
5) the digital pulsewidth modulation PWM ripple signal of the duty ratio of the charging current that described charging guidance controller control PWM adjusting module output respective user or system arrange, the positive voltage amplitude of the output digital pulsewidth modulation PWM ripple signal by described detection module sample detecting test point 1 (charging plug CP end), and further judge whether charging connecting device connects completely and whether vehicle-mounted charge control appliance is ready.
2. guidance method is controlled in the charging for electric vehicle alternating-current charging pile as claimed in claim 1, it is characterized in that: in step 5) in, if the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of test point 1 (charging plug CP end) is 12V, charging connecting device does not connect completely;
If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of test point 1 (charging plug CP end) is 9V, charging connecting device connects completely, but vehicle-mounted charge control appliance is not ready;
If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of test point 1 (charging plug CP end) is 6V, charging connecting device connect completely and vehicle-mounted charge control appliance ready, power supply place charging inlet carries out charging.
3. guidance method is controlled in the charging for electric vehicle alternating-current charging pile as claimed in claim 1 or 2, it is characterized in that further comprising step: in charging process, periodically detect the positive voltage amplitude of digital pulsewidth modulation PWM ripple signal and the voltage of test point 4 (charging plug CC end) of test point 1 (charging plug CP end), to judge connection status and the charging done state of charging inlet.
4. guidance method is controlled in the charging for electric vehicle alternating-current charging pile as claimed in claim 3, it is characterized in that: if described charging inlet detected, occur disconnecting, cut off charging finishing control guiding; If the positive voltage amplitude of the digital pulsewidth modulation PWM ripple signal of test point 1 (charging plug CP end) is 9V by 6V saltus step, judge that charging finishes, cut off power supply finishing control guiding.
5. guidance method is controlled in the charging for electric vehicle alternating-current charging pile as claimed in claim 1, it is characterized in that: when reaching the termination condition of vehicle set, or when operating personnel have carried out stopping the instruction of charging, stop controlling guiding, and disconnect the charging of power supply place charging inlet.
6. guidance method is controlled in the charging for electric vehicle alternating-current charging pile as claimed in claim 1, it is characterized in that: when electric vehicle alternating-current charging pile detects charging, connect disconnection completely and keep continuously 300ms, stopping controlling the charging of guiding and disconnect power supply place charging inlet.
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| CN201410207175.XA CN104037841B (en) | 2012-07-31 | 2012-07-31 | Charging for electric vehicle alternating-current charging pile controls guidance method |
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| CN201210271432.7A CN102820686B (en) | 2012-07-31 | 2012-07-31 | Charging control guidance module for alternating-current charge spot of electric vehicle and guidance method of charging control guidance module |
| CN201410207175.XA CN104037841B (en) | 2012-07-31 | 2012-07-31 | Charging for electric vehicle alternating-current charging pile controls guidance method |
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