CN112895965B - Implementation method of intelligent charging pile active initiation type charging pile communication protocol - Google Patents
Implementation method of intelligent charging pile active initiation type charging pile communication protocol Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000000977 initiatory effect Effects 0.000 title claims abstract description 32
- 238000012795 verification Methods 0.000 claims abstract description 6
- 230000004044 response Effects 0.000 claims description 48
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/30—Definitions, standards or architectural aspects of layered protocol stacks
- H04L69/32—Architecture of open systems interconnection [OSI] 7-layer type protocol stacks, e.g. the interfaces between the data link level and the physical level
- H04L69/322—Intralayer communication protocols among peer entities or protocol data unit [PDU] definitions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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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
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
- Y02T90/167—Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/12—Remote or cooperative charging
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S30/00—Systems supporting specific end-user applications in the sector of transportation
- Y04S30/10—Systems supporting the interoperability of electric or hybrid vehicles
- Y04S30/14—Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/20—Information technology specific aspects, e.g. CAD, simulation, modelling, system security
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Abstract
The invention discloses a realization method of an intelligent charging pile active initiation type charging pile communication protocol, which is used for realizing communication between a charging pile and a server, wherein the charging pile actively initiates a registration or login service request: after the charging pile is powered on and started, the charging pile actively establishes communication link connection with the server, and sends a registration request or a login request to the server, wherein the registration request or the login request comprises the equipment serial number of the charging pile and a variable secret key; wherein the variable key may be changed periodically in a defined manner; the server verifies the equipment serial number and the secret key, if the verification is passed, an electric pile coding address is allocated to the charging pile, and registration or login of the charging pile is completed; only after registration or login is successful, other communications are possible. The invention enables the charging pile to carry out data communication with the server by defining the software and hardware communication protocol of the charging pile, thereby realizing the management and monitoring of the integral operation of the charging pile service.
Description
RELATED APPLICATIONS
The invention relates to a divisional application of application number 2019103423886, application date of 2019, 04 month and 26 days, and the invention name of the realization method of an intelligent charging pile communication protocol.
Technical Field
The invention relates to the field of charging piles, in particular to a method for realizing an intelligent charging pile active initiation type charging pile communication protocol.
Background
Under the support of high-speed development and policy support of new energy automobiles, the development of the electric automobile charging facility industry in China is rapid, the technology is continuously improved and upgraded, and users have higher requirements on the service level and the intellectualization of the charging facility, such as quick look-up of charging piles, reservation of the charging piles in advance, real-time check of the charging process, notification prompt after charging, various quick payment modes and the like.
In addition, the conventional management station apparatus using the manual inspection method has the following drawbacks: problems can not be found in time, or the response is slow due to low treatment efficiency, and the sites are scattered, so that the labor cost is high; the operation and maintenance process is opaque and has no informatization, is difficult to be statistically analyzed, is unfavorable for management and the like.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for realizing an intelligent charging pile active initiation type charging pile communication protocol, which comprises the following steps:
the invention provides a realization method of an intelligent charging pile active initiation type charging pile communication protocol, which comprises a bearing layer, an access layer and an application layer, wherein the bearing layer is a communication link layer, the access layer is used for defining a communication transmission channel, and the application layer is used for bearing a protocol message packet;
the communication middleware uses a Netty framework, has a unified API, is suitable for blocking and non-blocking communication, and supports UDP based on an extensible event-driven model, a customizable thread model and connectionless data Socket;
the charging pile communication protocol is used for realizing communication between the charging pile and the server, the charging pile actively initiates a service request for registration or login, and the method for registration or login of the charging pile comprises the following steps:
after the charging pile is powered on and started, the charging pile actively establishes communication link connection with the server, and sends a registration request or a login request to the server, wherein the registration request or the login request comprises a device serial number of the charging pile and a variable secret key; the device serial number is unique and is fixed in the life cycle of the charging pile, is generated by a server, and is solidified in the charging pile before the charging pile leaves a factory; wherein the variable key may be changed periodically in a defined manner;
the server verifies the equipment serial number and the secret key, if the verification is passed, an electric pile coding address is allocated to the charging pile, and registration or login of the charging pile is completed; only after registration or login is successful, other communication is possible, and the electric pile coding address is contained in other communication message packets.
Further, the implementation method of the intelligent charging pile active initiation type charging pile communication protocol further comprises the step of actively initiating a charging service request by the charging pile, and the method for starting charging by the charging pile is as follows:
the charging pile initiates a charging starting request to the server, the server replies a charging response message corresponding to the charging starting request message to the charging pile, and after the charging pile receives the response message successfully, charging operation is started.
Further, the implementation method of the intelligent charging pile active initiation type charging pile communication protocol further comprises the step that the charging pile actively initiates a service request for stopping charging, and the method for stopping charging by the charging pile is as follows:
the charging pile sends a charging stopping request message to the server, and the server replies a charging stopping response message corresponding to the charging stopping request message to the charging pile, so that the charging pile can stop charging operation without waiting for the server to reply the charging stopping response message.
Further, if the charging pile actively initiates the charging stopping request message, and does not receive the reply message of the server, the charging stopping request message is initiated to the server again after a plurality of time intervals until the server replies successfully; if the charging pile cannot resend the charging stopping request message due to the reasons of link disconnection or power failure before the server replies successfully, the charging stopping request message is continuously sent after the link is recovered or electrified again and registration or login is successful until the server replies successfully, otherwise, the charging pile does not accept the next charging service request.
Further, the charging stop request message sent by the charging pile to the server contains billing information for settling the charging cost, the billing information contains charging electric quantity and charging cost details of different time periods, and total charging electric quantity and cost information, the minimum unit of the time period is minutes, and the time period can be set arbitrarily.
Optionally, the communication method for realizing card payment of the charging pile by the charging pile communication protocol comprises an electronic wallet card payment mode, and under the premise of completing the logging of the charging pile,
the method comprises the steps that a server receives a card swiping request message sent by a charging pile, wherein the card swiping request message comprises information such as card numbers, balances and the like; the server carries out validity identification according to the card swiping request and returns a card swiping reply message to the charging pile, wherein the card swiping reply message comprises a card validity identification result and card arrearage information;
if the card swiping reply message shows that the card is arrearage, the charging pile executes deduction operation on the card according to the arrearage information, and sends a deduction success request message to the server after deduction; the server eliminates arrearage information of the electronic wallet card in the server according to the deduction success request message and then replies a charging pile deduction response message; if the charging pile does not receive the deduction response message, continuously and repeatedly sending a deduction success request message until the server responds successfully.
Optionally, the communication method for realizing card payment of the charging pile by the charging pile communication protocol comprises an ID card payment mode, and under the premise of completing the logging of the charging pile,
the server receives the card swiping request message sent by the charging pile, only authenticates the card number contained in the card swiping request message, the server returns the card swiping request message to the charging pile, and when the charging pile receives the message of successful authentication, the charging pile can start charging service, and the method comprises the following steps: after receiving the card swiping request, the charging pile firstly reports the card number to the server, the server returns a message whether the card defaults or not, and if the card defaults, the charging pile firstly carries out fee deduction operation, and reports the fee deduction to the server after the fee deduction is successful.
Further, the charging pile communication protocol uses heartbeat messages to maintain a data communication link, if the charging pile is in a charging state, the heartbeat messages contain real-time billing information, and when link abnormality occurs, a server performs billing settlement according to the heartbeat messages.
Further, the implementation method of the intelligent charging pile active initiation type charging pile communication protocol further comprises the step of updating the software of the charging pile based on the charging pile communication protocol, and the implementation method comprises the following steps:
the method comprises the steps of transmitting software package data through a protocol-specified message format, and directly sending the software package data to a charging pile by a server in a mode of dividing the software package into a plurality of data packages with preset sizes, wherein the method comprises the following steps:
step 1: the server sends instruction information for updating the software to the charging pile, wherein the information comprises the version number of the updated software package, the number of the software package and the like;
step 2: the charging pile returns a response message of the update software message to the server;
step 3: the charging pile sequentially requests the server to acquire the nth packet of updating data according to the software version number received in the step 1, and n is sequentially increased from the 1 st packet until the last packet of updating data;
step 4: the server sends the nth package update data corresponding to the version number to the charging pile according to the update data request sent by the charging pile in the step 3;
step 5: repeating the steps 3 and 4 until the last packet of data is received, carrying out integrity check on all data by the charging pile, updating software if the integrity check is successful, and repeating the steps 3 to 5 if the integrity check is failed.
Further, a one-to-one communication mode is adopted between the charging pile and the server, and a responder replies to an initiator in a gap filling mode; the answering party needs to carry out validity check such as CRC check on the message packet, and the answering party does corresponding answer after judging the valid message; the command word of the response is the same as the initiator, and only the response mark indicates whether the response is successful or not; the responder only responds once, and does not repeatedly send a packet;
if the sender does not receive the message response replied by the responder after sending the message, retransmitting the message after a preset time interval; if the response of the response message is not received after the repeated resending message reaches the preset times, the equipment is judged to be offline; and after the charging pile is offline, the charging pile is used for closing the equipment which is initiated by the server and is in charging, and the charging pile for card swiping settlement can select to continue charging or close the charging state.
The technical scheme provided by the invention has the following beneficial effects:
a. the communication protocol is convenient for the software platform to analyze and process the data acquisition of the charging pile, so that the health state of the charging pile is comprehensively detected, and the overall operation of the charging pile service is monitored and managed;
b. the communication middleware uses a Netty framework, has uniform API, is suitable for blocking and non-blocking communication, and is based on a flexible and extensible event-driven model, a highly customizable thread model and reliable connectionless data Socket support (UDP);
c. the method has better throughput performance, low delay and more resource saving;
d. the problem of inconsistent NIO read-write frequency in a high-speed network environment is solved, and the problem of OutOfMemoryError caused by too fast, too slow or overload connection is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a message interaction flow chart for implementing registration/login by an intelligent charging pile communication protocol provided by an embodiment of the invention;
fig. 2 is a message interaction flow chart for realizing the start charging of the intelligent charging pile communication protocol provided by the embodiment of the invention;
fig. 3 is a message interaction flow chart for stopping charging by using the intelligent charging pile communication protocol provided by the embodiment of the invention;
FIG. 4 is a message interaction flow chart for implementing card swiping by the intelligent charging pile communication protocol provided by the embodiment of the invention;
fig. 5 is a message interaction flow chart for implementing update of the intelligent charging pile communication protocol according to the embodiment of the invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or device.
In one embodiment of the invention, a method for implementing an intelligent charging pile communication protocol is provided, wherein the charging pile communication protocol comprises a bearing layer, an access layer and an application layer, wherein the bearing layer is an actual link of communication, and transmission protocols such as MQTT and the like can be selected as a bearing protocol frame to specify a TCP connection port and a UDP port of a server side; the access layer defines a channel for communication transmission and related requirements; the application layer bears an application layer protocol message packet, and aims at various state monitoring alarm setting and other functions to realize data organization oriented to the monitoring function. The protocol is a description of access layer and application layer data. The protocol access layer protocol packet consists of a start mark, a data unit, a check unit and an end mark 4. The data unit part is application layer data and is encrypted.
The protocol message packet is used for realizing communication between the charging pile and the server, the charging pile is used for realizing a charging service request of the charging pile, and the charging service request comprises legal authentication of registration or login of the charging pile, starting charging, stopping charging, bill uploading after stopping charging, card swiping authentication and deduction, link maintenance, equipment state and alarm reporting, software updating and remote control operation, and the following operations are described one by one.
The method for implementing registration or login of the charging pile by using the charging pile communication protocol is shown in fig. 1, and the method comprises the following steps:
after the charging pile is powered on and started, the charging pile actively establishes communication link connection with the server, and sends a registration request or a login request to the server, wherein the registration request or the login request comprises a device serial number of the charging pile and a variable secret key; the device serial number is unique and is fixed in the life cycle of the charging pile, is generated by a server, and is solidified in the charging pile before the charging pile leaves a factory; wherein the variable key may be changed periodically in a defined manner;
the server verifies the equipment serial number and the secret key, if the verification is passed, an electric pile coding address is allocated to the charging pile, and registration or login of the charging pile is completed; only after registration or login is successful, other communication is possible, and the electric pile coding address is contained in other communication message packets.
The method specifically comprises the following steps:
after the charging pile is powered on and started, the server receives a registration request or a login request sent by the charging pile, wherein the registration request or the login request comprises a device serial number of the charging pile;
the server verifies the equipment serial number, if the verification is passed, an electric pile coding address is allocated to the charging pile, and registration or login of the charging pile is completed;
on the premise of completing registration or login of the charging pile, communication of charging operation, card swiping payment and/or updating operation can be carried out between the charging pile and the server, and message packets in communication all contain the electric pile coding address.
Specifically, the electric pile device first performs registration login every time it is powered on again. The electric pile contains the unique serial number of the equipment in the registration message, and after the server receives the message, the validity of the serial number is verified, and if the verification is passed, the global unique electric pile code is distributed to the charging pile. And the electric pile always sends a registration login message in a timing way under the condition that no normal message response is received, until the server responds normally, otherwise, the electric pile cannot provide service. The difference between registration and login is that in the registration protocol, the number of the operator in the message header is 0x000x00, the electric pile is encoded into the SN number of the electric pile, and the number of the operator in the message header and the electric pile in the login protocol are the contents returned by the registration protocol server.
The protocol defines the AC/DC type of the charging pile, the number of charging guns, manufacturer codes, a software version of the electric pile, a communication protocol version and a secret key.
Further, the charging operation includes starting charging, referring to fig. 2, in one technical scheme, a charging pile actively initiates charging starting, an uploading instruction, a server receives and returns a message (above a dotted line in fig. 2), in a charging pile side actively initiates a charging mode, a charging pile initiates a charging starting request to the server, the server replies a charging response message corresponding to the charging starting request message to the charging pile, and after the charging pile receives the response message successfully, the charging operation is started. The method specifically comprises the following steps:
the charging pile actively initiates a charging request starting message to the server;
the server replies a charging response message corresponding to the charging request starting message to the charging pile;
and the charging pile starts charging operation according to the charging response message.
In another technical scheme, a server initiates a charging start instruction, a charging pile receives, executes and returns a message (below a dotted line in fig. 2), and in a server side active initiation charging mode, the server initiates a charging start instruction message to the charging pile, and then the process is the same as the process of the active initiation of the charging pile side. The method specifically comprises the following steps:
initiating a charging instruction message to a charging pile by a server;
the charging pile initiates a charging starting request message to a server according to the charging starting instruction message;
the server replies a charging response message corresponding to the charging request message to the charging pile;
and the charging pile starts charging operation according to the charging response message.
The protocol defines gun number, opening mode, opening state, charging mode, timing charging, delay charging, order number, data, last charging electric quantity and last charged time.
Further, referring to fig. 2, the charging operation further includes stopping charging, in which, in a technical scheme, the charging pile actively initiates stopping charging, an upload instruction, the server receives and returns a message (above a dotted line in fig. 3), in the active initiation stopping mode of the charging pile side, the charging pile firstly sends a stopping charging request message to the server, and then the server replies a stopping charging response message corresponding to the stopping charging request message to the charging pile, and the charging pile can stop the charging operation without waiting for the server to reply the stopping charging response message. The method specifically comprises the following steps:
actively initiating a charging stopping request message to a server by a charging pile, wherein the charging stopping request message comprises bill information for settling charging fees;
the server replies a charging stopping response message corresponding to the charging stopping request message to the charging pile;
and the charging pile stops the charging operation according to the charging stopping response message.
The other technical scheme is that a server initiates stopping charging, issues an instruction, and a charging pile receives, executes and returns a message (below a dotted line in fig. 3), and under the active initiation stopping mode of the server side, the server initiates a stopping charging instruction message to the charging pile; and the subsequent process is the same as that in the active initiation stop mode of the charging pile side. The method specifically comprises the following steps:
initiating a charging stopping instruction message to a charging pile by a server;
the charging pile initiates a charging stopping request message to the server according to the charging stopping instruction message, wherein the charging stopping request message comprises bill information for settling charging fees, and a time-sharing charging mode is preferably adopted, namely charging fee details are calculated according to charging starting and stopping time and charging standards of corresponding time periods;
the server replies a charging stopping response message corresponding to the charging request message to the charging pile;
and the charging pile stops the charging operation according to the charging stopping response message.
The protocol defines the current charging quantity, the current charging amount, the payment mode, the stopping reason, the charging starting time, the charging ending time, the service charge type, the service charge amount, the charging detail, the start and stop code of the alternating current electric meter and the start and stop code of the direct current electric meter. The charging details comprise time-sharing charging period numbers, corresponding starting time, ending time, electric quantity and amount, and the charging details are shown in the following table:
| meaning of field | Field type | Length of | Description of the invention |
| Number of time-sharing charging period | byte | 1 | Number of time-sharing charging period (without default period) |
| Electric quantity | byte(*) | 4 | Default section charge quantity |
| Amount of money | byte(*) | 4 | Default segment charging fee unit 0.01 yuan |
| Start time (section 1-N) | byte(*) | 2 | Units: time division |
| End time (section 1-N) | byte(*) | 2 | Units: time division |
| Electric quantity (section 1-N) | byte(*) | 4 | Units of 0.01 degree |
| Amount (section 1-N) | byte(*) | 4 | Units of 0.01 yuan |
As can be seen from the above, in either the active initiation stop mode at the charging pile side or the active initiation stop mode at the server side, the charging pile sends a stop charging request message to the server, which includes billing information for settling charging fees, where the billing information may include charging amounts and charging fee details of different time periods, and total charging amounts and fee information, where a minimum unit of a time period is minutes, and the time period may be arbitrarily set.
Further, if the charging pile does not receive the reply message of the server after initiating the charging stopping instruction, initiating a charging stopping request message to the server again after a plurality of time intervals until the server replies successfully; if the charging pile cannot retransmit the charging stopping request message due to the reasons of link disconnection or power failure before the server replies successfully, the charging stopping request message continues to occur after the link is recovered or re-electrified and registration or login is successful until the server replies successfully, otherwise, the charging pile does not accept the next charging service request.
Further, the communication method for realizing the card swiping payment of the charging post by the charging post communication protocol comprises an electronic wallet card payment mode and an ID card payment mode:
for the card payment mode of the electronic wallet, the server receives a card swiping request message sent by the charging pile, wherein the card swiping request message comprises information such as card numbers, balances and the like; the server carries out validity identification according to the card swiping request and returns a card swiping reply message to the charging pile, wherein the card swiping reply message comprises a card validity identification result and card arrearage information;
if the card swiping reply message shows that the card is arrearage, the charging pile executes deduction operation on the card according to arrearage information, and sends a deduction success request message to the server after deduction; the server eliminates arrearage information of the electronic wallet card in the server according to the deduction success request message and then replies a charging pile deduction response message; if the charging pile does not receive the deduction response message, continuously and repeatedly sending a deduction success request message until the server responds successfully;
and for the ID card payment mode, the server receives a card swiping request message sent by the charging pile, only authenticates the card number contained in the card swiping request message, returns a card swiping request message response to the charging pile, and can start charging service after the charging pile receives a message of successful authentication. As shown in fig. 4, the method includes the following steps:
the method comprises the steps that a server receives a card swiping request message sent by a charging pile, wherein the card swiping request message comprises card number information;
the server returns a card swiping reply message to the charging pile according to the card swiping request, wherein the card swiping reply message comprises arrearage information of the card;
if the card swiping reply message shows card arrearages, the server receives a deduction request message sent by the charging pile;
the server returns a deduction reply message to the charging pile according to the deduction request message;
and finishing the deduction operation according to the deduction reply message.
Specifically, after the electric pile receives the card swiping, the card number is firstly reported to the server, and the server returns whether the card is arrearage or not.
If the server returns arrearage after reporting by swiping the card, the electric pile firstly carries out fee deduction operation, and reports the fee deduction to the server after successful fee deduction. The type of the card is distinguished here as an electronic wallet or an ID card, no money is on the ID card, and the deduction is deducted from the software platform.
The protocol defines the card number, balance, amount to be deducted (e-wallet), amount of orders and order structure.
Further, the communication method of the update operation is that the server issues an update file, the charging pile receives, executes and returns a message, the message format is regulated by a protocol to transmit software package data, the software package is divided into a plurality of data packages with preset sizes, and the data packages are directly sent to the charging pile by the server, see fig. 5, and the method comprises the following steps:
step 1: the server sends instruction information for updating the software to the charging pile, wherein the information comprises the version number of the updated software package, the number of the software package and the like;
step 2: the charging pile returns a response message of the update software message to the server;
step 3: the charging pile sequentially requests the server to acquire the nth packet of updating data according to the software version number received in the step 1, and n is sequentially increased from the 1 st packet until the last packet of updating data;
step 4: the server sends the nth package update data corresponding to the version number to the charging pile according to the update data request sent by the charging pile in the step 3;
step 5: repeating the steps 3 and 4 until the last packet of data is received, carrying out integrity check on all data by the charging pile, updating software if the integrity check is successful, and repeating the steps 3 to 5 if the integrity check is failed.
The protocol defines an update flag, a software version number, a total number of packets, a current packet sequence number, and data.
In an embodiment of the present invention, the charging pile communication protocol uses heartbeat messages to maintain the data communication link, if the charging pile is in a charging state, the heartbeat messages may include billing information, and when link abnormality occurs, the server may perform billing settlement according to the heartbeat messages.
When the server applies control and checking states to the charging pile, the server not only uses fixed setting and inquiring instructions, but also comprises a self-defining instruction, when the self-defining instruction is used, the server packages the self-defining instruction data content input by a user according to a protocol format and then sends the self-defining instruction data content to the charging pile, the self-analyzing and executing of the charging pile are carried out, reply data are packaged in the self-defining data section according to the protocol format and sent to the server, and the server detects the self-defining data section in the reply message and displays the self-defining data section to the user.
In the embodiment of the invention, the communication between the electric pile and the server adopts a one-to-one answer mode (except for a re-registration request), and the answering party replies to the initiating party in a filling mode. The responder needs to perform validity check such as CRC check on the message packet, and does not respond correspondingly until the valid message is determined. The command word of the reply is identical to the initiator and indicates only at the reply-tag whether the reply was successful. The responder only responds once, and does not repeat the sending of the package.
To ensure delivery of a message, if a message response is not received, the message sender needs to resend the message after a certain time interval until a message response is received. If the importance level of the sent subsequent message is higher than that of the current retransmitted message, the message with high importance level and the retransmitted message are sent first.
The retransmission interval is set, preferably between 1s and 30s, freely chosen depending on the importance of the message, but not exceeding 2 minutes at maximum.
If the response message is not received for a plurality of times, the device can be judged to be offline. The device and the server perform corresponding processing, wherein the electric pile needs to put the charging device initiated by the server end into a closed state after offline, and the charging pile for card swiping settlement can continue to charge or close the charging state according to the requirement.
According to the invention, the software and hardware communication protocol of the charging pile is defined, so that the charging pile and the software platform are in data communication, thereby realizing the intellectualization of the charging pile and being convenient for managing and monitoring the overall operation of the charging pile service.
The communication protocol is convenient for the software platform to analyze and process the data acquisition of the charging pile, so that the health state of the charging pile is comprehensively detected, and the overall operation of the charging pile service is monitored and managed.
The communication middleware uses a Netty framework, has uniform API, is suitable for blocking and non-blocking communication, and is based on a flexible and extensible event-driven model, a highly customizable thread model and reliable connectionless data Socket support (UDP). And has better throughput performance, low delay and more resource saving. The problem of inconsistent NIO read-write frequency in a high-speed network environment is solved, and the problem of OutOfMemoryError caused by too fast, too slow or overload connection is solved.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. The implementation method of the intelligent charging pile active initiation type charging pile communication protocol is characterized in that the charging pile communication protocol comprises a bearing layer, an access layer and an application layer, wherein the bearing layer is a communication link layer, the access layer is used for defining a communication transmission channel, and the application layer is used for bearing a protocol message packet;
the charging pile communication protocol is used for realizing communication between the charging pile and the server, a one-to-one communication mode is adopted between the charging pile and the server, and a responder replies to an initiator in a filling mode; the responder performs CRC validity check on the message packet, and performs corresponding response after judging the valid message; the command word of the response is the same as the initiator, and only the response mark indicates whether the response is successful or not; the responder only responds once, and does not repeatedly send a packet; the charging pile actively initiates a registration or login service request, and the charging pile registration or login method comprises the following steps:
after the charging pile is powered on and started, the charging pile actively establishes communication link connection with the server, and sends a registration request or a login request to the server, wherein the registration request or the login request comprises a device serial number of the charging pile and a variable secret key; the device serial number is unique and is fixed in the life cycle of the charging pile, is generated by a server, and is solidified in the charging pile before the charging pile leaves a factory; wherein the variable key may be changed periodically in a defined manner;
the server verifies the equipment serial number and the secret key, if the verification is passed, an electric pile coding address is allocated to the charging pile, and registration or login of the charging pile is completed; only after the registration or login is successful, other communication is possible, and other communication message packets all contain the electric pile coding address;
the charging pile actively initiates a service request for stopping charging, and the method for stopping charging by the charging pile comprises the following steps: firstly, a charging pile sends a charging stopping request message to a server, and then the server replies a charging stopping response message corresponding to the charging stopping request message to the charging pile, wherein the charging pile can stop charging operation without waiting for the server to reply the charging stopping response message; if the charging pile actively initiates the charging stopping request message and does not receive the reply message of the server, initiating the charging stopping request message to the server again after a plurality of time intervals until the server replies successfully; if the charging pile can not resend the charging stopping request message due to the link disconnection or power failure before the server replies successfully, the charging stopping request message is continuously sent after the link is restored or electrified again and registration or login is successful, until the server replies successfully, otherwise, the charging pile does not accept the next charging service request;
the charging pile communication protocol uses heartbeat messages to maintain a data communication link, if a charging pile is in a charging state, the heartbeat messages contain real-time bill information, and when the link is abnormal, a server performs bill settlement according to the heartbeat messages.
2. The method for implementing the intelligent charging pile initiative initiation type charging pile communication protocol according to claim 1, further comprising a service request for the charging pile initiative initiation type charging, wherein the method for starting charging by the charging pile is as follows:
the charging pile initiates a charging starting request to the server, the server replies a charging response message corresponding to the charging starting request message to the charging pile, and after the charging pile receives the response message successfully, charging operation is started.
3. The method for implementing the intelligent charging pile initiative initiation type charging pile communication protocol according to claim 1, wherein the charging pile stop request message sent to the server by the charging pile contains billing information for settling charging fees, the billing information contains charging electricity quantity and charging fee details of different time periods, and total charging electricity quantity and fee information, the minimum unit of the time period is minutes, and the time period can be set arbitrarily.
4. The method for implementing the intelligent charging pile initiative initiation type charging pile communication protocol according to claim 1, wherein the communication method for implementing the charging pile card swiping payment of the charging pile by the charging pile communication protocol comprises an electronic wallet card payment mode, on the premise of completing the charging pile login,
the method comprises the steps that a server receives a card swiping request message sent by a charging pile, wherein the card swiping request message comprises a card number and balance information; the server carries out validity identification according to the card swiping request and returns a card swiping reply message to the charging pile, wherein the card swiping reply message comprises a card validity identification result and card arrearage information;
if the card swiping reply message shows that the card is arrearage, the charging pile executes deduction operation on the card according to the arrearage information, and sends a deduction success request message to the server after deduction; the server eliminates arrearage information of the electronic wallet card in the server according to the deduction success request message and then replies a charging pile deduction response message; if the charging pile does not receive the deduction response message, continuously and repeatedly sending a deduction success request message until the server responds successfully.
5. The method for implementing the intelligent charging pile initiative initiation type charging pile communication protocol according to claim 1, wherein the communication method for implementing the charging pile card swiping payment of the charging pile by the charging pile communication protocol comprises an ID card payment mode, on the premise of completing the charging pile login,
the server receives the card swiping request message sent by the charging pile, only authenticates the card number contained in the card swiping request message, the server returns the card swiping request message to the charging pile, and when the charging pile receives the message of successful authentication, the charging pile can start charging service, and the method comprises the following steps: after receiving the card swiping request, the charging pile firstly reports the card number to the server, the server returns a message whether the card defaults or not, and if the card defaults, the charging pile firstly carries out fee deduction operation, and reports the fee deduction to the server after the fee deduction is successful.
6. The method for implementing the intelligent charging pile initiative initiation type charging pile communication protocol according to claim 1, further comprising updating the software of the charging pile based on the charging pile communication protocol, comprising:
the method comprises the steps of transmitting software package data through a protocol-specified message format, and directly sending the software package data to a charging pile by a server in a mode of dividing the software package into a plurality of data packages with preset sizes, wherein the method comprises the following steps:
step 1: the server sends instruction information for updating the software to the charging pile, wherein the information comprises version numbers of updated software packages and package number information;
step 2: the charging pile returns a response message of the update software message to the server;
step 3: the charging pile sequentially requests the server to acquire the nth packet of updating data according to the software version number received in the step 1, and n is sequentially increased from the 1 st packet until the last packet of updating data;
step 4: the server sends the nth package update data corresponding to the version number to the charging pile according to the update data request sent by the charging pile in the step 3;
step 5: repeating the steps 3 and 4 until the last packet of data is received, carrying out integrity check on all data by the charging pile, updating software if the integrity check is successful, and repeating the steps 3 to 5 if the integrity check is failed.
7. The method for implementing an intelligent charging pile initiative initiation type charging pile communication protocol according to claim 1, wherein if a sender does not receive a message response replied by a responder after sending a message, the message is retransmitted after a preset time interval; if the response of the response message is not received after the repeated resending message reaches the preset times, the equipment is judged to be offline; and after the charging pile is offline, the charging pile is used for closing the equipment which is initiated by the server and is in charging, and the charging pile for card swiping settlement can select to continue charging or close the charging state.
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| CN112448959B (en) * | 2020-12-07 | 2023-01-24 | 四川光慧新能源科技有限公司 | Communication method for charging pile and control center |
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| CN112590606A (en) * | 2021-02-02 | 2021-04-02 | 四川光慧新能源科技有限公司 | Method for completing real-time monitoring of charging pile through connectionless UDP (user Datagram protocol) message |
| CN113590147A (en) * | 2021-06-19 | 2021-11-02 | 特瓦特能源科技有限公司 | Charging pile upgrading system and method |
| EP4112368A1 (en) * | 2021-07-01 | 2023-01-04 | Lorrygram GmbH | Mobile energy supply unit |
| CN113645306A (en) * | 2021-08-16 | 2021-11-12 | 浙江吉利控股集团有限公司 | Offline message forwarding method and charging pile system |
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| CN112895964A (en) | 2021-06-04 |
| CN112895964B (en) | 2024-01-02 |
| CN112937354B (en) | 2024-01-02 |
| CN112937354A (en) | 2021-06-11 |
| CN112895965A (en) | 2021-06-04 |
| CN110182092A (en) | 2019-08-30 |
| CN110182092B (en) | 2020-12-25 |
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