CN114125585A - Monitoring and analyzing system and method for charging process of electric automobile charging pile - Google Patents
Monitoring and analyzing system and method for charging process of electric automobile charging pile Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- 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
Abstract
The utility model provides an electric automobile fills electric pile charging process control analytic system and method, an electric automobile fills electric pile charging process control analytic system, includes: the system comprises an acquisition module, a management module, a data storage module and a station side analysis monitoring module; according to the charging system, the charging process monitoring terminal can record the running state of the charging pile and the interaction data of the charging pile and the electric vehicle during charging, and can remotely check and monitor the running of the charging pile; when the charging pile is in fault or the charging pile and the electric vehicle are in fault in the charging process, the change conditions of various electric quantities and related message data in the processes before and after the fault are provided, and the data are analyzed and compared through a matched analysis tool, so that the starting point of the fault and the specific fault reason can be judged; the intelligent backup system has a dual backup function, CAN perform data backup through communication with station-side software, and CAN also perform backup with an adjacent device through the CAN interface, so that the safety of data is fully guaranteed.
Description
Technical Field
The disclosure belongs to the technical field of electrical engineering, and particularly relates to a system and a method for monitoring and analyzing a charging process of an electric automobile charging pile.
Background
At present, the charging pile end and the electric automobile end can check the charging real-time state by accessing a monitoring screen during charging.
The inventor of the present disclosure finds that the following problems exist in the method and the existing electric vehicle charging pile charging process monitoring system: 1. interactive data in the charging process are not stored or are not completely stored, and once an accident occurs, the accident reason cannot be identified due to the insufficient data; 2. meanwhile, in the process of rechecking and analyzing the whole charging process, the electric data and the message data in the charging process are not combined, and the charging process or the charging problem is not visually embodied; 3. in addition, due to the fact that stored data in the charging pile are damaged possibly caused by accidents in the charging process, the accident reason is more difficult to find.
Disclosure of Invention
The charging process monitoring terminal can record the running state of the charging pile and the interactive data between the charging pile and the electric vehicle during charging, and can remotely check and monitor the running of the charging pile; when the charging pile is in fault or the charging pile and the electric vehicle are in fault in the charging process, the change conditions of various electric quantities and related message data in the processes before and after the fault are provided, the data are analyzed and compared through a matched analysis tool, the starting point of the fault and the specific fault reason can be judged, and the method has an important effect on improving the safe operation water level of the charging pile; the system also has a dual backup function, CAN perform data backup through communication with station software, and CAN also perform backup with an adjacent device through a CAN interface, so that the safety of data is fully guaranteed.
In order to achieve the above object, in a first aspect, the present disclosure provides an electric vehicle charging pile charging process monitoring and analyzing system, which adopts the following technical scheme:
a monitoring and analyzing system for a charging process of an electric automobile charging pile comprises an acquisition module, a management module, a data storage module and a station side analysis and monitoring module;
the acquisition module is used for acquiring electrical data, switching value data and CAN message data in the operation process of the charging pile;
the management module is used for performing parameter storage, B code timing, charging state monitoring, electric data preprocessing and message preprocessing on the electric data and the message data acquired by the acquisition module;
the data storage module is used for storing data in the acquisition module and the management module, supporting an online backup mode of CAN messages and carrying out mutual backup through CAN communication with adjacent charging piles;
and the station end analysis monitoring module is used for monitoring the running state of the charging pile and real-time data of the charging process in real time, acquiring the data in the management module and the data storage module, and analyzing the charging process through data analysis and waveform analysis respectively.
Furthermore, the acquisition module comprises an electrical data acquisition module, a switching value acquisition module and a message data acquisition module;
the electric data acquisition module is used for acquiring electric data of the charging pile in the operation process, wherein the electric data comprises direct current output voltage, current magnitude and battery voltage; meanwhile, acquiring voltage of a battery management system, control guide voltage and temperature data of a charging gun;
the switching value acquisition module is used for acquiring the switching value data of the multi-path charging pile, wherein the switching value data comprises data of a charging gun electronic lock, a positive bus direct current relay and a negative bus direct current relay;
and the message data acquisition module is used for acquiring a battery management system message and a charging control unit message in the charging process.
Further, the management module combines the voltage and current data with the CAN message data and synchronously stores the data; or, the CAN message is independently and separately stored.
Further, the charge state monitoring means that whether charging is carried out or not is judged according to the voltage of the battery management system and the switching value state of the electronic lock of the charging gun, if charging is carried out, a charging start time record is generated, and a charging end time record is generated when charging is finished.
Further, the electrical data preprocessing refers to filtering the voltage and current sampling data; the message preprocessing refers to filtering the message.
Furthermore, the required voltage message of the battery management system is analyzed and selected, and compared with the real-time value of the voltage of the battery management system measured in real time, whether the operation of the battery management system meets the requirement or not in the charging process is monitored visually.
Furthermore, the data storage module adopts an SD card mode to store data, supports an online backup mode of the CAN messages, and performs mutual backup through CAN communication with adjacent charging piles.
Further, the data storage module comprises steady-state data storage, message data storage, charging archive storage and data backup functions;
the steady-state data storage means that sampling data are circularly stored and a steady-state file is generated;
the message data storage means that the messages are respectively stored in a steady-state standard power system transient data exchange general format and an independent datagram storage format;
the charging archive storage means that the charging start time and the charging end time recorded by the management module are generated into an archive and recorded;
the data backup means that a path of CAN interface is adopted to perform mutual backup on the message and the device of the adjacent pile.
Further, the station side analysis monitoring module comprises real-time monitoring, steady-state data checking and exporting, message data checking and exporting, charging process analysis, charging waveform analysis, charging file checking, data backup and parameter reading and writing functions;
the real-time monitoring refers to checking the change of each item of sampling data and mastering the running state of the charging pile;
the steady-state data checking and exporting means that stored steady-state data and a steady-state data file are obtained, the waveform of the steady-state data is checked, and the operating state of the charging pile is analyzed through the waveform;
the message data checking and exporting means that the message data is checked independently, and the ID and the data content information of the CAN message are checked;
the charging process analysis means that the data of the charging stage is selected according to the charging start time and the charging end time by analyzing the recorded charging message data, and the data of each charging stage is analyzed;
the charging waveform analysis means that a charging waveform is selected from steady-state data and is displayed in an integrated mode, and a complete waveform of one-time charging is displayed in an interface to display the whole charging state;
the charging file checking means that the recorded charging starting time and charging ending time are checked, and a charging file is selected according to the time;
the data backup is that not only the backup of adjacent devices of the message is realized through CAN communication, but also the sampling data is stored in a station end monitoring analysis platform;
the parameter reading and writing refers to modifying the operation parameters of the device.
In order to achieve the above object, in a second aspect, the present disclosure further provides a method for monitoring and analyzing a charging process of an electric vehicle charging pile, which adopts the following technical scheme:
a method for monitoring and analyzing the charging process of an electric automobile charging pile adopts the system for monitoring and analyzing the charging process of the electric automobile charging pile in the first aspect; the method comprises the following steps:
acquiring electrical data, switching value data and CAN message data in the operation process of a charging pile;
the method comprises the steps of performing parameter storage, B code timing, charging state monitoring, electric data preprocessing and message preprocessing on electric data and message data acquired by an acquisition module;
the data in the acquisition module and the management module are stored, an online backup mode of the CAN message is supported, and mutual backup is carried out through CAN communication with adjacent charging piles;
and monitoring the running state of the charging pile and real-time data of the charging process in real time, acquiring the data in the management module and the data storage module, and analyzing the charging process through data analysis and waveform analysis respectively.
Compared with the prior art, the beneficial effect of this disclosure is:
1. according to the charging system, the charging process monitoring terminal can record the running state of the charging pile and the interaction data of the charging pile and the electric vehicle during charging, and can remotely check and monitor the running of the charging pile; when the charging pile is in fault or the charging pile and the electric vehicle are in fault in the charging process, the change conditions of various electric quantities and related message data in the processes before and after the fault are provided, the data are analyzed and compared through a matched analysis tool, the starting point of the fault and the specific fault reason can be judged, and the method has an important effect on improving the safe operation water level of the charging pile;
2. the system also has a dual backup function, CAN perform data backup through communication with station software, and CAN also perform backup with an adjacent device through a CAN interface, so that the safety of data is fully guaranteed.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the present embodiments, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the present embodiments and together with the description serve to explain the present embodiments without unduly limiting the present embodiments.
Fig. 1 is an overall structural view of embodiment 1 of the present disclosure;
FIG. 2 is a schematic diagram of data interaction in embodiment 1 of the present disclosure;
fig. 3 is a station monitoring analysis software structure according to embodiment 1 of the present disclosure.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
Example 1:
as shown in fig. 1, the present disclosure provides an electric vehicle charging pile charging process monitoring and analyzing system, which includes an acquisition module, a management module, a data storage module and a station side analysis and monitoring module.
In this embodiment, compared with a general wave recording device, the acquisition module CAN acquire not only voltage, current and switching value data, but also CAN acquire CAN message data; specifically, the method comprises the following modules:
the electric data acquisition module: the system can acquire important electrical data in the operation process of the charging pile, has comprehensive acquisition amount, not only acquires direct current output voltage, current magnitude and battery voltage, but also acquires BMS (battery management system) voltage, CC1 (control guidance) voltage and temperature data of a charging gun;
switching value acquisition module: the function of carrying out the collection to 3 way charging pile switching value data is provided, and the safety is guaranteed in isolation circuit's design. The switching values collected in this design are: a charging gun electronic lock, a positive bus direct current relay and a negative bus direct current relay;
a message data acquisition module: besides voltage, current and switching value data, the device additionally adopts a 3-path high-performance CAN controller to collect BMS (battery management system) messages and TCU (charging control unit) messages in the charging process. The messages play an important role in analyzing the charging process of the charging pile, and compared with an acquisition device which only acquires voltage, current and switching value, the device can complete the analysis of the charging process in cooperation with the messages and analyze the messages according to the regulation of a communication protocol (hereinafter referred to as a GB/T27930 protocol) between a GB/T27930 and an electric vehicle off-board conductive charger and a battery management system on BMS message communication.
In the embodiment, the functions of the management module are controlled by a microprocessor, and a lightweight Freetos real-time system is used for scheduling among multiple tasks, so that the real-time performance of the system is ensured; the management module mainly has the functions of parameter storage, B code time synchronization, charging state monitoring, voltage and current preprocessing, message preprocessing, steady-state data caching and message caching.
The management module CAN combine the electrical data such as voltage, current and the like with the CAN message data, and synchronously store the data, thereby being beneficial to on-site monitoring; and a mode of independent and separated storage of the CAN messages CAN be adopted, so that maintenance personnel CAN analyze the CAN messages independently.
Specifically, each function of the management module is as follows:
and (3) parameter storage: the device parameters are stored in the device through an EEPROM (electrically erasable programmable read-only memory), and are automatically read after being electrified;
and B code pair: the device is provided with a B code 485 timing interface, and automatically performs timing after accessing a B code signal;
monitoring the charging state: the device realizes the control to the charged state simultaneously to data receiving in-process, judges whether to charge through BMS voltage and the switching value state of charging gun electronic lock, if can generate the charge start time record in charging, generates the charge end time record when the completion. Charging part data can be selected at the station end by virtue of the charging record, so that the charging data and the waveform are analyzed;
voltage and current pretreatment: and after sampling is finished, filtering the voltage and current sampling data, and adopting a median filtering algorithm in order to overcome the interference of filtering sampling. The algorithm continuously samples for 5 times, 5 sampling values are arranged according to the size, and the intermediate value is taken as the effective value at this time;
message preprocessing: the function can use a filter to filter the message, and can also analyze the ID of the message through a GB/T27930 protocol to select the required message. In the real-time monitoring function of the measured data, the required BMS required voltage message is analyzed and selected and compared with the real-time value of the BMS voltage measured in real time, so that whether the operation of the BMS system meets the requirement or not in the charging process can be monitored visually;
data caching: and caching the sampled data and transferring the data to a data storage module.
In this embodiment, the data storage module adopts the SD card mode to store data, and compared with the fixed memory mode or the hard disk storage mode adopted by the conventional data recording device, the method has the advantages of convenient installation and replacement, small occupied space, and good protection effect on data, and in addition, once the charging pile is damaged due to an accident, the SD card can be independently taken out for reading.
In addition, the data storage module also supports an online backup mode of CAN messages, mutual backup is carried out through CAN communication with adjacent charging piles, and safety is increased for data storage of the device; the specific functions are as follows:
and (3) steady-state data storage: the sampling data can be circularly stored, and a steady-state file is generated to be convenient to check; the recording data storage format is a COMTRADE (common format for transient data exchange of a standard power system) standard format;
message data storage: the messages are respectively stored in a steady state COMTRADE format and an independent PCAP (datagram storage format) message format, and data can be visually displayed through steady state storage; the PCAP format message is stored independently and can be viewed independently;
and (3) charging archive storage: generating and recording the charging start time and the charging end time recorded by the management module;
data backup: and the message and the device of the adjacent pile are mutually backed up by adopting one CAN interface, and the safety of data is further improved by the mutual backup function.
In this embodiment, the station end analysis monitoring module is connected with the station end analysis monitoring module through a network cable and is composed of an analysis monitoring software platform, software can monitor the running state of the charging pile and real-time data of the charging process in real time, can analyze the charging process by reading wave recording data and message data, and analyzes the charging process through data analysis and waveform analysis, so that the system is greatly helpful for searching charging faults and reasons.
The station side analysis monitoring software has multiple functions, wherein the charging process analysis can analyze each stage of the charging process by analyzing messages, such as: BMS interaction processes (such as handshaking, identification, parameter configuration, readiness, pre-charging, shutdown, and whether each stage message interaction is successful); insulation detection process (voltage DC contactor open/close state); pre-charging process (voltage, current, battery voltage and dc contactor on-off state); in the shutdown process (voltage, current, battery voltage, the opening and closing state of the direct current contactor), certain conclusions can be further obtained through analysis, such as charging pile active shutdown, BMS abnormal shutdown, charging pile fault shutdown and the like; specifically, each function is as follows:
and (3) real-time monitoring: the change of each sampling data can be checked in time by analyzing the real-time monitoring function of the monitoring software, and the running state of the charging pile can be mastered; the direct current output voltage, the direct current output current, the battery voltage, the BMS voltage, the control guide voltage, the state of an electronic lock of a charging gun, the state of a positive bus direct current relay and the state of a negative bus direct current relay can be checked through real-time information, the BMS required voltage can be immediately checked through analyzing a BMS message, and the BMS required voltage is compared with the actual measured voltage of the BMS;
steady state data viewing and derivation: the function can acquire the stored steady-state data and the steady-state data file from the SD card through the network interface, can check the waveform of the steady-state data through special data analysis software, and analyze the running state of the charging pile through the waveform;
message data viewing and exporting: the function CAN independently check the message data, and check information such as ID and data content of the CAN message through a message analysis tool;
and (3) analyzing the charging process: the function can analyze the recorded charging message data, select the data of the charging stage according to the charging start time and the charging end time, and analyze the data of each charging stage;
and (3) analyzing a charging waveform: the function can select the charging waveform from the steady-state data and display the charging waveform in an integrated manner, and the complete waveform of one-time charging is displayed in the interface, so that the overall charging state is visually displayed, and compared with a common device with the function of displaying charging data, the function has better and more visual effect and is greatly helpful for searching problems in the charging process;
the charging file is checked: checking the functions of the recorded charging start time and the charging end time, and selecting a charging file according to the time;
data backup: the system also has a unique double backup function, not only CAN the backup of adjacent devices of the message be realized through CAN communication, but also the sampling data CAN be stored in a station end monitoring analysis platform, so that the double insurance of the data is realized, once the data is damaged and cannot be read due to the occurrence of a problem in the pile, the recording data CAN still be retrieved from the station end, and the complex data repair process is not required due to the data damage;
reading and writing parameters: the station-side analysis platform can also modify the device operation parameters. The convenience of operation and maintenance is realized.
In this embodiment, as shown in fig. 2, the overall operation structure of the charging process monitoring and analyzing system is shown, and data interaction among the devices is mainly completed through a network cable and a CAN line.
Each device is connected with station monitoring analysis software through an RJ45 port by using a network cable, and is uniformly monitored, data are transmitted through TCP network connection, and backup is carried out.
Meanwhile, adjacent devices communicate through a CAN interface, message data are mutually backed up, and the data safety is improved.
As shown in fig. 3, in this embodiment, the station monitoring and analyzing software structure is: the software is client software and is communicated with a device, namely a server through TCP connection, and the server operates according to an instruction sent by the client software; the server device adopts an LWIP (light network protocol) protocol, so that the occupation of the RAM is reduced on the basis of maintaining the TCP protocol, and compared with a full version TCP/IP protocol stack, the light protocol is more suitable for the use of an embedded device.
Meanwhile, the station-side software and the device communicate in a concurrent communication mode, and can simultaneously process a plurality of client requests. As shown in fig. 3, the software is of a hierarchical structure, after entering a software interface, the identifiers and serial numbers of the charging piles are displayed, and after clicking a specific charging pile, the software enters the next stage, for example, after clicking the charging pile # 1, the charging pile # 1 device server is connected with client software, and communication with other devices which do not need to be operated temporarily is interrupted, so that the communication bandwidth is ensured, and the communication speed is increased (as shown in a dotted line state).
After entering the next level, 5 items of content of the next level, namely real-time information, a recording file, a message file, a charging file and parameter reading and writing can be operated.
The next stage of the association of the recording file is a recording waveform analysis function, the corresponding recording file is read by acquiring the name of the waveform file in the recording file, and then the waveform is analyzed through software.
The lower level operation of the message file association is a message analysis function, the message analysis adopts the message analysis function carried in software, the messages are classified by analyzing the ID and the content of the messages, and further the messages can be analyzed by a GB/T27930 protocol.
The charging archive associated subordinate operation is a charging process analysis function, the starting time and the ending time of charging are determined according to the time in the charging archive, the recorded data of the charging time are selected, the function not only analyzes the electric quantity, but also is combined with the wave recording message, the charging process can be integrally and comprehensively analyzed, and the problem of charging faults is found out.
Example 2:
the embodiment provides a method for monitoring and analyzing the charging process of an electric vehicle charging pile, which adopts the system for monitoring and analyzing the charging process of the electric vehicle charging pile as described in embodiment 1; the method comprises the following steps:
acquiring electrical data, switching value data and CAN message data in the operation process of a charging pile;
the method comprises the steps of performing parameter storage, B code timing, charging state monitoring, electric data preprocessing and message preprocessing on electric data and message data acquired by an acquisition module;
the data in the acquisition module and the management module are stored, an online backup mode of the CAN message is supported, and mutual backup is carried out through CAN communication with adjacent charging piles;
and monitoring the running state of the charging pile and real-time data of the charging process in real time, acquiring the data in the management module and the data storage module, and analyzing the charging process through data analysis and waveform analysis respectively.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications and variations. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present embodiment should be included in the protection scope of the present embodiment.
Claims (10)
1. A monitoring and analyzing system for a charging process of an electric vehicle charging pile is characterized by comprising an acquisition module, a management module, a data storage module and a station side analysis and monitoring module;
the acquisition module is used for acquiring electrical data, switching value data and CAN message data in the operation process of the charging pile;
the management module is used for performing parameter storage, B code timing, charging state monitoring, electric data preprocessing and message preprocessing on the electric data and the message data acquired by the acquisition module;
the data storage module is used for storing data in the acquisition module and the management module, supporting an online backup mode of CAN messages and carrying out mutual backup through CAN communication with adjacent charging piles;
and the station end analysis monitoring module is used for monitoring the running state of the charging pile and real-time data of the charging process in real time, acquiring the data in the management module and the data storage module, and analyzing the charging process through data analysis and waveform analysis respectively.
2. The system for monitoring and analyzing the charging process of the electric vehicle charging pile according to claim 1, wherein the acquisition module comprises an electrical data acquisition module, a switching value acquisition module and a message data acquisition module;
the electric data acquisition module is used for acquiring electric data of the charging pile in the operation process, wherein the electric data comprises direct current output voltage, current magnitude and battery voltage; meanwhile, acquiring voltage of a battery management system, control guide voltage and temperature data of a charging gun;
the switching value acquisition module is used for acquiring the switching value data of the multi-path charging pile, wherein the switching value data comprises data of a charging gun electronic lock, a positive bus direct current relay and a negative bus direct current relay;
and the message data acquisition module is used for acquiring a battery management system message and a charging control unit message in the charging process.
3. The system for monitoring and analyzing the charging process of the charging pile of the electric automobile according to claim 2, wherein the management module combines voltage and current data with CAN message data and synchronously stores the voltage and current data and the CAN message data; or, the CAN message is independently and separately stored.
4. The system for monitoring and analyzing the charging process of the charging pile of the electric vehicle as claimed in claim 2, wherein the monitoring of the charging state refers to determining whether to charge or not according to the voltage of the battery management system and the switching value state of the electronic lock of the charging gun, and if the charging is in progress, generating a charging start time record, and if the charging is finished, generating a charging end time record.
5. The system for monitoring and analyzing the charging process of the charging pile of the electric automobile as claimed in claim 2, wherein the electrical data preprocessing refers to filtering the voltage and current sampling data; the message preprocessing refers to filtering the message.
6. The system for monitoring and analyzing the charging process of the charging pile of the electric automobile as claimed in claim 1, wherein the operation of the battery management system in the charging process is visually monitored to determine whether the operation meets the requirement by analyzing the message and selecting the required voltage message of the battery management system and comparing the message with the real-time value of the voltage of the battery management system measured in real time.
7. The system for monitoring and analyzing the charging process of the electric vehicle charging pile according to claim 1, wherein the data storage module stores data in an SD card manner, supports an online backup mode for CAN messages, and performs mutual backup through CAN communication with adjacent charging piles.
8. The system for monitoring and analyzing the charging process of the electric vehicle charging pile according to claim 1, wherein the data storage module comprises steady-state data storage, message data storage, charging archive storage and data backup functions;
the steady-state data storage means that sampling data are circularly stored and a steady-state file is generated;
the message data storage means that the messages are respectively stored in a steady-state standard power system transient data exchange general format and an independent datagram storage format;
the charging archive storage means that the charging start time and the charging end time recorded by the management module are generated into an archive and recorded;
the data backup means that a path of CAN interface is adopted to perform mutual backup on the message and the device of the adjacent pile.
9. The system for monitoring and analyzing the charging process of the charging pile of the electric automobile according to claim 8, wherein the station-side analysis and monitoring module comprises real-time monitoring, steady-state data viewing and exporting, message data viewing and exporting, charging process analysis, charging waveform analysis, charging file viewing, data backup and parameter reading and writing functions;
the real-time monitoring refers to checking the change of each item of sampling data and mastering the running state of the charging pile;
the steady-state data checking and exporting means that stored steady-state data and a steady-state data file are obtained, the waveform of the steady-state data is checked, and the operating state of the charging pile is analyzed through the waveform;
the message data checking and exporting means that the message data is checked independently, and the ID and the data content information of the CAN message are checked;
the charging process analysis means that the data of the charging stage is selected according to the charging start time and the charging end time by analyzing the recorded charging message data, and the data of each charging stage is analyzed;
the charging waveform analysis means that a charging waveform is selected from steady-state data and is displayed in an integrated mode, and a complete waveform of one-time charging is displayed in an interface to display the whole charging state;
the charging file checking means that the recorded charging starting time and charging ending time are checked, and a charging file is selected according to the time;
the data backup is that not only the backup of adjacent devices of the message is realized through CAN communication, but also the sampling data is stored in a station end monitoring analysis platform;
the parameter reading and writing refers to modifying the operation parameters of the device.
10. An electric vehicle charging pile charging process monitoring and analyzing method, which is characterized in that the electric vehicle charging pile charging process monitoring and analyzing system of any one of claims 1-9 is adopted; the method comprises the following steps:
acquiring electrical data, switching value data and CAN message data in the operation process of a charging pile;
the method comprises the steps of performing parameter storage, B code timing, charging state monitoring, electric data preprocessing and message preprocessing on electric data and message data acquired by an acquisition module;
the data in the acquisition module and the management module are stored, an online backup mode of the CAN message is supported, and mutual backup is carried out through CAN communication with adjacent charging piles;
and monitoring the running state of the charging pile and real-time data of the charging process in real time, acquiring the data in the management module and the data storage module, and analyzing the charging process through data analysis and waveform analysis respectively.
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