CN110228393A - A kind of alternating-current charging pile control system - Google Patents
A kind of alternating-current charging pile control system Download PDFInfo
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- CN110228393A CN110228393A CN201910428328.6A CN201910428328A CN110228393A CN 110228393 A CN110228393 A CN 110228393A CN 201910428328 A CN201910428328 A CN 201910428328A CN 110228393 A CN110228393 A CN 110228393A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/60—Monitoring or controlling charging stations
- B60L53/66—Data transfer between charging stations and vehicles
- B60L53/665—Methods related to measuring, billing or payment
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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
-
- 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
-
- 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
- Y02T90/12—Electric charging stations
-
- 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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
Abstract
The present invention provides a kind of alternating-current charging pile control systems, including AC power source, isolated DC power supply and veneer control unit, veneer control unit includes the payment function configuration module that encapsulation is integrated on pcb board, power circuit, main control module, charging control circuit, measure monitor module, communication module, human-computer interaction module and payment module, AC power source is connect with power circuit, power circuit is connect with payment function configuration module, payment function configuration module is connect with main control module, main control module respectively with power circuit, measure monitor module, charging control circuit, communication module, human-computer interaction module connection, payment module is connect by communication module with main control module, payment function configuration module configures the payment function of payment module by main control module；Isolated DC power supply is connect with charging control circuit and measure monitor module respectively.The present invention can be suitable for a variety of usage scenarios by configuring different payment functions；It is integrated using veneer, it is convenient for safeguarding.
Description
Technical field
The present invention relates to charging pile field more particularly to a kind of alternating-current charging pile control systems.
Background technique
The fuel charger of charging pile being functionally similar to inside gas station, can be fixed on ground or wall, be installed on public
It builds in (public building, market, Public Parking etc.) and residential area parking lot or charging station, it can be according to different voltage
Grade is that the electric car of various models charges.Alternating-current charging pile is that one kind is mounted on outside electric vehicle, is connect with AC network, is led to
Cross Vehicular charger and provide the charging unit of AC power source to batteries of electric automobile, general its have electric quantity metering, charging, communication,
The functions such as control.Central and local government gave very big support to electric car in recent years, and many cities have oneself now
Electric car popularization plan, the demand of electric automobile market increased under the promotion of government.Existing alternating-current charging pile function
Can be single, payment function configuration cannot be carried out according to scene is installed and used, such as in some remote charging stations, network environment
Difference, charging pile are only required to simple charging accounting function, and clearing are settled accounts by modes such as cashes；And some not open-minded
The city of the barcode scanning means of payment, can only be by paying in cash or cCredit card payment；And in the city of some relatively modernizations, it may
Support various payment methods, therefore charging pile needs are customized according to usage scenario, versatility is poor；Existing charging pile device is many
It is more, it is difficult to safeguard.
Summary of the invention
For the deficiency in the presence of the prior art, the present invention provides a kind of alternating-current charging pile control system, purposes
It is to solve the problems, such as existing charging pile poor universality, is difficult to safeguard.
To achieve the above object, present invention employs the following technical solutions:
According to embodiments of the present invention, a kind of alternating-current charging pile control system, including AC power source, isolated DC electricity are provided
Source, veneer control unit and charging gun, the veneer control unit include the payment function configuration mould that encapsulation is integrated on pcb board
Block, power circuit, main control module, charging control circuit, measure monitor module, communication module, human-computer interaction module and payment mould
Block, the AC power source are connect with charging control circuit, power circuit and measure monitor module respectively, the power circuit and branch
Pay the connection of functional configuration module, the payment function configuration module connect with main control module, the main control module respectively with power supply
Circuit, measure monitor module, charging control circuit, communication module, human-computer interaction module connection, the payment module pass through communication
Module is connect with main control module, and the payment function configuration module configures the payment function of payment module by main control module；Institute
It states isolated DC power supply to connect with charging control circuit and measure monitor module respectively, the charging control circuit and charging gun connect
It connects.
Further, the power circuit includes protection circuit and switching power circuit, and the protection circuit includes Anti-surging
Circuit and grounded inspection circuit, the AC power source are connect with anti-surge circuit and grounded inspection circuit respectively, the Anti-surging
Circuit is connect with switching power circuit, and the grounded inspection circuit is connect with main control module, and the switching power circuit includes filter
Wave circuit and AC/DC module, the filter circuit are connect with anti-surge circuit, and the filter circuit is connect with AC/DC module, institute
AC/DC module is stated to connect with main control module.
Further, the AC/DC module (3222) is also connected with voltage regulator.
Further, the communication module includes that ETH module, WIFI module, 4G module, bluetooth module and RS485 communication connect
Mouth mold block, the payment function configuration module configure communication module by toggle switch to realize corresponding payment function.
Further, the charging control circuit includes detection circuit and the charging circuit of shaking hands that charge, the inspection of shaking hands of charging
Slowdown monitoring circuit includes CP signal generating circuit and CP signal feedback circuit, and the CP signal generating circuit includes the first light-coupled isolation electricity
Road, the first operational amplification circuit, the pwm signal that the main control module generates by passing through first again after the first optical coupling isolation circuit
Operational amplification circuit exports CP signal；The CP signal feedback circuit includes rectification circuit, linear optical coupling isolation circuit and second
Operational amplification circuit, it is defeated through linear optical coupling isolation circuit and the second operational amplification circuit after the rectified circuit rectifies of CP signal
The AD Sampling Interface of main control module is arrived out；The charging circuit includes the first relay and the second relay, first relay
The main contacts of device and the zero line output end of charging gun connect, the main contacts of second relay and the fire wire output end of charging gun
Connection, the main control module passes through metal-oxide-semiconductor respectively and connect with the coil of the first relay and the second relay, to realize master control mould
The small signal control high-current relay work of block.
Further, the measure monitor module includes current sampling circuit and voltage sampling circuit, the measure monitor mould
Block is communicated by optical coupling isolation circuit with main control module.
Further, the system also includes emergency stop switch, the main control module is connect with emergency stop switch.
Further, the current sampling circuit includes firewire sample circuit and zero curve sample circuit, the zero curve sampling electricity
Road is sampled using current transformer, and the firewire sample circuit is sampled using constantan-made resistances.
Further, the system also includes police instruction module, the police instruction module respectively with measure monitor module
It is connected with protection circuit, the police instruction module includes indicating lamp module and buzzer.
Compared with the prior art, the invention has the following beneficial effects:
A variety of payment functions are integrated in a payment module by charging pile control system of the invention, pass through payment function
Configuration module configures different network communication modes, realizes different payment functions, can be suitable for a variety of usage scenarios；It will lead
It wants function all to concentrate on one piece of veneer, pass through the pin of hardware configuration veneer and realizes that pin function is matched by program load
It sets, normalization is facilitated to safeguard.
Detailed description of the invention
Fig. 1 is present invention veneer configuration diagram shown according to an exemplary embodiment；
Fig. 2 is circuit construction of electric power schematic diagram of present invention on the basis of Fig. 1；
Fig. 3 is the structural schematic diagram of the switching power circuit of Fig. 2；
Fig. 4 is the power supply tree schematic diagram of power circuit of the present invention power supply；
Fig. 5 is the application circuit structural schematic diagram of payment function configuration module；
Fig. 6 a and 6b are respectively that a kind of the shake hands structural schematic diagram of detection circuit of charging shown in exemplary embodiment is torn open
Two Local maps being divided into, the complete charging of two Local maps synthesis are shaken hands the structural schematic diagram of detection circuit；
Fig. 7 is a kind of structural schematic diagram of the charging circuit shown in exemplary embodiment；
Fig. 8 is present invention Belling BL6523GX chip functions block diagram shown according to an exemplary embodiment；
Fig. 9 is the metering circuit figure of the BL6523GX chip of application drawing 8.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
It is only to be not intended to limit the invention merely for for the purpose of describing particular embodiments in terminology used in the present invention.
It is also intended in the present invention and the "an" of singular used in the attached claims, " described " and "the" including majority
Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to includes
One or more associated any or all of project listed may combine.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the present invention
A little information should not necessarily be limited by these terms.These terms are only used to for same type of information being distinguished from each other out.For example, not departing from
In the case where the scope of the invention, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination ".
A kind of alternating-current charging pile control system provided in an embodiment of the present invention, as shown in Figure 1, Fig. 1 is according to a kind of example
Property implement the veneer configuration diagram that exemplifies, including AC power source 1, isolated DC power supply 2, veneer control unit 3 and charging
Rifle 4, veneer control unit 3 include payment function configuration module 31, the power circuit 32, master control mould that encapsulation is integrated on pcb board
Block 33, charging control circuit 34, measure monitor module 35, communication module 36, human-computer interaction module 37 and payment module 38, exchange
Power supply 1 is connect with charging control circuit 34, power circuit 32 and measure monitor module 35 respectively, power circuit 32 and payment function
Configuration module 31 connects, and payment function configuration module 31 connect with main control module 33, main control module 33 respectively with power circuit 32,
Measure monitor module 35, charging control circuit 34, communication module 36, human-computer interaction module 37 connect, and payment module 38 passes through logical
News module 36 is connect with main control module 33, and payment function configuration module 31 configures the payment of payment module 38 by main control module 33
Function；Isolated DC power supply 2 is connect with charging control circuit 34 and measure monitor module 35 respectively, the charging control circuit 34
It is connect with charging gun 4.
With reference to Fig. 2, on the basis of Fig. 1, power circuit 32 includes protection circuit 321 and switching power circuit 322, protection
Circuit 321 includes anti-surge circuit 3211 and grounded inspection circuit 3212, AC power source 1 respectively with anti-surge circuit 3211 and connect
Ground detection circuit 3212 connects, and anti-surge circuit 3211 is connect with switching power circuit 322, grounded inspection circuit 3212 and master control
Module 33 connects, and switching power circuit 322 includes filter circuit 3221 and AC/DC module 3222, filter circuit 3221 and wave resistance
The connection of circuit 3211 is gushed, filter circuit 3221 is connect with AC/DC module 3222, and AC/DC module 3222 is connect with main control module 33.
In a kind of preferred embodiment, AC/DC module 3222 using LH15 series or the power module of LHE15 serial model No.,
It is exported including two-way, exports 12V voltage, another output 5V voltage, a kind of application LHE15-20D0512-04 power supply mould all the way
The circuit structure of block is as shown in Figure 3；Here according to actual conditions, voltage is also adjusted to by actually required electricity by voltage regulator
It presses, the power supply tree in the present embodiment is as shown in figure 4, display, relay etc. directly use 12V voltage, CPU, communication module 36
Deng operating voltage needed for 5V voltage is adjusted to each electronic device by corresponding voltage regulator.In order to equipment operation it is reliable
Property, the DC power supply in the present embodiment using isolation is that the charging control circuit 34 of veneer and measure monitor circuit are powered, isolation
DC power supply include 12V output and 5V output.
In a kind of exemplary embodiment, communication module 36 include ETH module, WIFI module, 4G module, bluetooth module and
RS485 communication interface module, payment function configuration module 31 configure communication module 36 by toggle switch to realize corresponding branch
Function is paid, the circuit structure of the payment function configuration module 31 in the present embodiment is as shown in figure 5, control master control using toggle switch
The binary code of 4 pins of module 33 realizes payment function configuration, and a kind of allocation list of the present embodiment is as shown in table 1, tool
Body configuration can be defined or extend according to the actual situation, can theoretically define 16 kinds of functional configuration:
Table 1
Charging control circuit 34 includes that charging is shaken hands detection circuit and charging circuit, and charging detection circuit of shaking hands includes CP letter
Number generation circuit and CP signal feedback circuit, CP signal generating circuit include the first optical coupling isolation circuit, the first operation amplifier electricity
Road, the pwm signal that main control module 33 generates is by exporting CP by the first operational amplification circuit again after the first optical coupling isolation circuit
Signal；CP signal feedback circuit includes rectification circuit, linear optical coupling isolation circuit and the second operational amplification circuit, and CP signal is through whole
The AD Sampling Interface of main control module 33 is output to after current circuit rectification through linear optical coupling isolation circuit and the second operational amplification circuit,
To realize generation CP signal and shake hands to realize to electric vehicle to the feedback collection of CP signal, the letter such as charging current is sent
It ceases, the charging in the present embodiment shakes hands detection circuit specific implementation as shown in figures 6 a and 6b, and wherein Fig. 6 a is inspection of shaking hands of charging
The left-half of slowdown monitoring circuit, Fig. 6 b are that charging is shaken hands the right half part of detection circuit；The U48_6a pin and U25A_6a of Fig. 6 a draws
Foot is connect with the U27A_6b pin of Fig. 6 b and U49_6b pin respectively；
Charging circuit includes the first relay and the second relay, main contacts and the charging gun 4 of first relay
The connection of zero line output end, the main contacts of second relay are connect with the fire wire output end of charging gun 4, and main control module 33 is distinguished
It is connect by metal-oxide-semiconductor with the coil of the first relay and the second relay, to realize the big electricity of small signal control of main control module 33
Current relay work, the specific implementation of one of the present embodiment charging circuit are as shown in Figure 7.
In a kind of embodiment, measure monitor module 35 includes acquiring firewire electric current respectively and the two-way electric current of neutral line current is adopted
Sample circuit and voltage sampling circuit, measure monitor module 35 are communicated by optical coupling isolation circuit with main control module 33；Measure monitor
Module 35 realizes electric leakage alarming function by the imbalance of the two-way current detecting supply current of acquisition, and realizes entire charging
The region disconnecting of forceful electric power and light current in stake control system, measure monitor module 35 uses Belling BL6523GX chip here,
BL6523GX chip is a wide-range single-phase multifunctional electrical power metering chip, is suitable for simple single-phase multifunctional, has
Higher cost performance, the chip functions block diagram is as shown in figure 8, using the metering circuit figure of the chip as shown in figure 9, in Fig. 9
Each circuit unit is attached by identical pin name.
Zero curve and the unexpected of firewire are shorted in order to prevent, in preferred embodiment, the first input end of measure monitor module 35
It is connect by current transformer with zero curve, to realize the acquisition to neutral line current.
In preferred embodiment, the fortuitous event in charging process occurs in order to prevent, and system further includes emergency stop switch, is used for
It forces to stop charging in an emergency situation, main control module 33 is connect with emergency stop switch.
In order to the operating status of more convenient gain charging pile, system further includes police instruction module, police instruction mould
Block is connect with measure monitor module 35 and protection circuit 321 respectively, and police instruction module includes indicating lamp module and buzzer.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.The present invention is directed to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by right
It is required that pointing out.
The foregoing is merely presently preferred embodiments of the present invention and oneself, be not intended to limit the invention, it is all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (9)
1. a kind of alternating-current charging pile control system, it is characterised in that: including AC power source (1), isolated DC power supply (2), veneer
Control unit (3) and charging gun (4), the veneer control unit (3) include the payment function configuration that encapsulation is integrated on pcb board
Module (31), power circuit (32), main control module (33), charging control circuit (34), measure monitor module (35), communication module
(36), human-computer interaction module (37) and payment module (38), the AC power source (1) respectively with charging control circuit (34), electricity
Source circuit (32) and measure monitor module (35) connection, the power circuit (32) connect with payment function configuration module (31),
The payment function configuration module (31) connect with main control module (33), the main control module (33) respectively with power circuit
(32), measure monitor module (35), charging control circuit (34), communication module (36), human-computer interaction module (37) connection, it is described
Payment module (38) is connect by communication module (36) with main control module (33), and the payment function configuration module (31) passes through master
Control the payment function of module (33) configuration payment module (38)；The isolated DC power supply (2) respectively with charging control circuit
(34) it is connect with measure monitor module (35) connection, the charging control circuit (34) with charging gun (4).
2. alternating-current charging pile control system according to claim 1, it is characterised in that: the power circuit (32) includes anti-
Protection circuit (321) and switching power circuit (322), the protection circuit (321) include anti-surge circuit (3211) and ground connection inspection
Slowdown monitoring circuit (3212), the AC power source (1) connect with anti-surge circuit (3211) and grounded inspection circuit (3212) respectively, institute
It states anti-surge circuit (3211) to connect with switching power circuit (322), the grounded inspection circuit (3212) and main control module
(33) it connects, the switching power circuit (322) includes filter circuit (3221) and AC/DC module (3222), the filtered electrical
Road (3221) is connect with anti-surge circuit (3211), and the filter circuit (3221) connect with AC/DC module (3222), described
AC/DC module (3222) is connect with main control module (33).
3. alternating-current charging pile control system according to claim 2, it is characterised in that: the AC/DC module (3222) is also
It is connected with voltage regulator.
4. alternating-current charging pile control system according to claim 1, it is characterised in that: the communication module (36) includes
ETH module, WIFI module, 4G module, bluetooth module and RS485 communication interface module, the payment function configuration module (31)
By toggle switch configuration communication module (36) to realize corresponding payment function.
5. alternating-current charging pile control system according to claim 1, it is characterised in that: charging control circuit (34) packet
It includes charging to shake hands detection circuit and charging circuit, charging detection circuit of shaking hands includes that CP signal generating circuit and CP signal are anti-
Current feed circuit, the CP signal generating circuit include the first optical coupling isolation circuit, the first operational amplification circuit, the main control module
(33) pwm signal generated is by exporting CP signal by the first operational amplification circuit again after the first optical coupling isolation circuit；It is described
CP signal feedback circuit includes rectification circuit, linear optical coupling isolation circuit and the second operational amplification circuit, and the CP signal is through whole
The AD sampling for being output to main control module (33) through linear optical coupling isolation circuit and the second operational amplification circuit after current circuit rectification connects
Mouthful；The charging circuit includes the first relay and the second relay, main contacts and charging gun (4) of first relay
The connection of zero line output end, the main contacts of second relay are connect with the fire wire output end of charging gun (4), the main control module
(33) it is connect respectively by metal-oxide-semiconductor with the coil of the first relay and the second relay, to realize the small letter of main control module (33)
Number control high-current relay work.
6. alternating-current charging pile control system according to claim 1, it is characterised in that: measure monitor module (35) packet
Current sampling circuit and voltage sampling circuit are included, the measure monitor module (35) passes through optical coupling isolation circuit and main control module
(33) it communicates.
7. alternating-current charging pile control system according to claim 1, it is characterised in that: the system also includes emergency stops to open
It closes, the main control module (33) connect with emergency stop switch.
8. alternating-current charging pile control system according to claim 6, it is characterised in that: the current sampling circuit includes fire
Line sample circuit and zero curve sample circuit, the zero curve sample circuit are sampled using current transformer, the firewire sampling
Circuit is sampled using constantan-made resistances.
9. alternating-current charging pile control system according to claim 1, it is characterised in that: the system also includes police instructions
Module, the police instruction module connect with measure monitor module (35), charging control circuit (34) and protection circuit (321) respectively
It connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910428328.6A CN110228393A (en) | 2019-05-22 | 2019-05-22 | A kind of alternating-current charging pile control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910428328.6A CN110228393A (en) | 2019-05-22 | 2019-05-22 | A kind of alternating-current charging pile control system |
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| CN110228393A true CN110228393A (en) | 2019-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113223385A (en) * | 2021-04-25 | 2021-08-06 | 深圳职业技术学院 | Charging principle demonstration system based on new energy automobile charging process |
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