CN109866648B

CN109866648B - Intelligent charging method and system for electric automobile

Info

Publication number: CN109866648B
Application number: CN201910338394.4A
Authority: CN
Inventors: 贾晓波; 徐晶
Original assignee: SAIC Volkswagen Automotive Co Ltd
Current assignee: SAIC Volkswagen Automotive Co Ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2021-03-26
Anticipated expiration: 2039-04-25
Also published as: CN109866648A

Abstract

The invention relates to the technical field of electric automobiles, in particular to an intelligent charging method and system for an electric automobile. The method comprises the following steps: searching a communication signal of the electric automobile by the charging pile; the communication signal meets the communication condition, the charging pile receives the vehicle identification information sent by the electric vehicle, primary authentication is carried out, and if the charging pile enables the received vehicle identification information to be consistent with authorized vehicle identification information, the charging pile controls the ground lock to descend; the charging pile receives a charging gun inserting signal sent after the electric automobile is inserted into the charging gun, secondary authentication is carried out, if vehicle identity identification information of the electric automobile contained in the charging gun inserting signal is consistent with authorized vehicle identity identification information, the charging pile starts a charging mode so as to charge the electric automobile. The invention greatly improves the experience of charging of users, reduces the operation and maintenance time and cost of enterprises and users to a certain extent, and has higher charging safety.

Description

Intelligent charging method and system for electric automobile

Technical Field

The invention relates to the technical field of electric automobiles, in particular to an intelligent charging method and system for an electric automobile.

Background

With the rapid development of electric vehicles in recent years, charging technology has also received increasing attention from the industry as a main technology for electric vehicle development, and charging piles currently proposed by various large OEM manufacturers (Original Equipment manufacturers) and charging pile manufacturers are mainly developed based on national standards to meet the most basic charging requirements of users.

However, the following problems are revealed to be urgently solved in the process of charging the electric vehicle: firstly, for part of owners of electric automobiles, fixed parking spaces configured with charging piles are often occupied by other vehicles, so that the vehicles cannot enter the parking spaces for charging when the owners need to charge; secondly, how to conveniently and remotely share the private charging pile for other electric vehicle users, such as authorized friends or shared to make money for strangers, without going to the site for operation; thirdly, the starting of the existing private charging pile is mainly started by swiping a charging card or a mobile phone APP, the dependence on the charging card and the requirement on the quality of a mobile communication network are high, and the charging experience is influenced greatly under the condition that the charging card is lost or an underground garage is owned but the mobile communication network signal is not good; fourth, the length of the present charging gun line is long, some lengths are nearly 5m, the charging gun line is scattered due to improper management, the charging gun line is easy to be rolled and damaged by vehicles, and meanwhile, the heavy gun line wound before and after each charging is not a little pressure to partial female owners.

In view of the above problems, the prior art solutions are as follows: the parking space is independently managed, the parking space and the vehicle are two independent systems, and the fixed parking space is prevented from being occupied by other vehicles in a mechanical or remote control ground locking mode; secondly, authorizing charging or realizing a 'plug and play' function, which is realized by mainly using a Radio Frequency Identification (RFID) card or through a mobile phone APP authorization background, wherein the 'plug and play' function means that a charging gun can be charged by being inserted into a charging port of a vehicle; thirdly, most charging gun lines at present have no management device, and in some prior art schemes, a purely mechanical reel is adopted to wind and manage the charging gun lines.

In summary, the charging method for the electric vehicle in the prior art mainly has the following disadvantages: the management of the parking place ground lock requires the driver to park and get off the vehicle, and the driving comfort is not good; the requirement for a mobile communication network is high depending on the fact that the mobile phone APP starts authorized charging, and the function cannot be realized in an area with poor signals; the purely mechanical charging gun line management device is heavy and the user experience is not good.

Disclosure of Invention

The invention aims to provide an intelligent charging method and system for an electric vehicle, which solve the problems in the background art and improve the use experience of a user through an intelligent charging method.

In order to achieve the purpose, the invention provides an intelligent charging method for an electric automobile, which comprises the following steps:

searching a communication signal of the electric automobile by the charging pile;

the charging pile receives the vehicle identification information sent by the electric vehicle and carries out primary authentication, wherein the primary authentication is that the charging pile compares the received vehicle identification information with authorized vehicle identification information;

if the received vehicle identification information is consistent with the authorized vehicle identification information by the charging pile, the one-time authentication is passed, the charging pile controls the ground lock to descend, and if the vehicle identification information is not consistent with the authorized vehicle identification information, the one-time authentication is not passed;

the charging pile receives a charging gun inserting signal sent after the electric automobile is inserted into the charging gun, and performs secondary authentication, wherein the secondary authentication is that the charging pile compares vehicle identification information of the electric automobile contained in the charging gun inserting signal with authorized vehicle identification information;

if the vehicle identification information of the electric vehicle contained in the charging gun insertion signal is consistent with the authorized vehicle identification information, the secondary authentication is passed, the charging pile starts a charging mode to charge the electric vehicle, and if the vehicle identification information is inconsistent, the secondary authentication is not passed.

In one embodiment, the ground lock does not fall when the primary authentication fails, and the charging pile does not charge the electric vehicle when the secondary authentication fails.

In an embodiment, after the one-time authentication fails, the charging pile repeatedly initiates one-time authentication within a preset time, and if the one-time authentication fails after the preset time, the ground lock does not descend, and the charging pile enters a sleep mode.

In one embodiment, when the electric vehicle is fully charged or the charging process is actively stopped, and the charging pile is not pulled out from the vehicle, the charging pile is in a charging waiting mode within a preset time, and after the preset time, the charging pile enters a sleep mode, wherein the charging waiting mode refers to that when the electric vehicle initiates a charging request again, the charging request is directly responded without authentication.

In one embodiment, when the electric vehicle is fully charged or the charging process is actively stopped, the charging pile is pulled out from the vehicle, and the charging pile enters the sleep mode.

In an embodiment, the ground lock detects that no foreign matter exists above the ground lock, the charging pile is notified, the charging pile controls the ground lock to ascend, the charging pile judges that the intensity of the communication signal of the electric automobile is lower than a preset threshold value, and the ground lock is notified to enter a sleep mode.

In an embodiment, the communication signal meeting the communication condition means that when the electric vehicle drives to the charging pile, a relative distance between the electric vehicle and the charging pile is smaller than a preset distance, and the intensity of the communication signal received by the charging pile is larger than a set threshold.

In one embodiment, the preset distance is 50 meters, the set threshold of the communication signal strength is 43dB, and the time period for the charging pile to search for the communication signal of the electric vehicle is 6 s.

In an embodiment, the server receives and stores authorized vehicle identification information, charging pile identification information and ground lock identification information set by the user side, and sends the authorized vehicle identification information and the authorized ground lock identification information to the corresponding charging pile according to the charging pile identification information sent by the user side.

In one embodiment, the user side is a mobile phone client side, and communicates with the server side through a mobile communication network to transmit information;

the server side is a cloud platform and communicates with the charging pile through a mobile communication network to transmit information.

In one embodiment, the charging pile receives and stores authorized vehicle identification information for primary authentication and secondary authentication, receives and stores ground lock identification information, and establishes communication with the ground lock through the ground lock identification information.

In one embodiment, the electric vehicle, the charging pile and the ground lock are in wireless communication, and the wireless communication mode is one of a bluetooth mode, a Wi-Fi mode and a Zigbee mode.

In one embodiment, the vehicle identification information is a vehicle identification number, a vehicle engine number or a license plate number.

In one embodiment, after the charging gun is pulled off from the vehicle and inserted to a specified position, the switch of the gun line recycling mechanism at the top of the charging pile is opened, and the charging gun line is dragged and collected by the gun line recycling mechanism.

In order to achieve the above object, the present invention provides an intelligent charging system for an electric vehicle, comprising:

the system comprises a client, a server and a server, wherein the client sets vehicle identification information, charging pile identification information and ground lock identification information which need to be authorized, communicates with the server to transmit information, and writes the information into the server;

the server side receives and stores the vehicle identification information, the charging pile identification information and the ground lock identification information which are authorized by the user side, and sends the vehicle identification information and the ground lock identification information to the corresponding charging piles according to the charging pile identification information;

the charging pile is used for receiving and storing authorized vehicle identification information sent by the server side, performing primary authentication and secondary authentication when the electric automobile is intelligently charged, receiving and storing ground lock identification information, and establishing communication with a ground lock through the ground lock identification information;

the ground lock comprises a communication module, and the communication module is responsible for receiving a charging pile instruction to control the ground lock to ascend and descend.

In an embodiment, fill electric pile, still include rifle line and retrieve the mechanism, open the switch that fills the rifle line of electric pile top and retrieve the mechanism, the rifle line that charges is retrieved the mechanism and is dragged and draw in by the rifle line.

In one embodiment, the gun line recycling mechanism comprises a differential motor and a steel wire rope reel, a switch of the gun line recycling mechanism is opened, the differential motor drives the steel wire rope reel to rotate, and the charging gun line is collected and recycled by the steel wire rope reel.

In one embodiment, the ground lock detects foreign matters according to a certain period, informs the charging pile of the detection of the foreign matters above the ground lock, and descends after receiving the charging pile instruction.

According to the intelligent charging method and system for the electric automobile, the charging experience of a user is greatly improved, the charging pile and the ground lock can be conveniently checked, maintained and replaced, the operation and maintenance time and cost of enterprises and users are reduced to a certain extent, and the charging safety is higher.

The intelligent charging method and system for the electric automobile provided by the invention have the following beneficial effects:

1) the communication signal condition of the primary authentication is triggered, the influence of different use working conditions of the driver, the technical characteristics of the Bluetooth and the surrounding driving environment on the Bluetooth signal is comprehensively considered, so that the continuity of driving and parking the parking space of the driver is not influenced, and the user experience is good.

2) Through the encryption and decryption operation of inserting the rifle signal to the rifle that charges, ensure to be inserted the rifle wait to charge the vehicle and the actual uniformity that has the vehicle that charges who has the authority of charging, fill electric pile through the vehicle that charges that has the authority triggers the activation promptly, can not be stolen by unauthorized vehicle and charge to charging process safe and reliable more avoids filling electric pile and is stolen by other people.

3) When a recoverable fault occurs in the vehicle-end charging system, the gun inserting signal of the charging gun and the S2 switching state of the vehicle-mounted charger are judged in a delayed mode, so that the purpose that charging can be continued after the fault of the vehicle-end alternating current charging system is recovered when the vehicle-end alternating current charging system is unsupervised is achieved.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:

FIG. 1 discloses a flow chart of an intelligent charging method for an electric vehicle according to an embodiment of the invention;

fig. 2 discloses a flow chart of a vehicle and charging pile identity information setting manner according to an embodiment of the invention;

FIG. 3 discloses a flow chart of one-time authentication of a vehicle and a charging post according to an embodiment of the invention;

FIG. 4 discloses a flow chart of ground lock ascent according to an embodiment of the present invention;

FIG. 5 discloses a flow chart of secondary authentication of a vehicle and a charging post according to an embodiment of the invention;

FIG. 6 discloses a flow chart of ending AC charging of a vehicle according to an embodiment of the invention;

FIG. 7 discloses a flow chart of ground lock descent in accordance with an embodiment of the present invention;

fig. 8 discloses a structure view of a top mechanism of the auxiliary charging apparatus according to an embodiment of the present invention;

fig. 9 is a diagram illustrating a complete effect of the auxiliary charging device according to an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention aims to provide a set of complete safe and intelligent charging solutions aiming at the technical problems of plug-and-play charging, charging gun line management, private parking space management, private sharing and the like, and mainly solves the technical problem of plug-and-play charging.

Fig. 1 discloses a flowchart of an intelligent charging method for an electric vehicle according to an embodiment of the present invention, and as shown in fig. 1, the intelligent charging method for an electric vehicle provided by the present invention generally includes the following steps:

step S101: searching a communication signal of the electric automobile by the charging pile;

step S102: and the communication signal meets the communication condition, and the charging pile receives the vehicle identity identification information sent by the electric automobile and carries out primary authentication. The primary authentication is that the charging pile compares the received vehicle identity identification information with authorized vehicle identity identification information;

step S103: the charging pile receives a charging gun inserting signal sent after the electric automobile is inserted into the charging gun, and performs secondary authentication, wherein the secondary authentication is that the charging pile compares vehicle identification information of the electric automobile contained in the charging gun inserting signal with authorized vehicle identification information;

Before the intelligent charging method is carried out, authorized vehicle identification information, charging pile identification information (hereinafter referred to as charging pile ID code) and ground lock identification information (hereinafter referred to as ground lock ID code) need to be registered and configured, and the authorized vehicle can be charged through the charging pile. The user can set corresponding identification information through the user side, the identification information is sent to the server side, and then the server side sends corresponding information to the charging pile, so that the identification information setting is completed.

The authorized vehicle identification information refers to identification information corresponding to a vehicle authorized to use the charging pile for charging, and the vehicle identification information may be information that can identify the vehicle, such as a vehicle identification number (VIN code), a vehicle engine number, or a license plate number.

The user side can set vehicle identification information needing authorization, charging pile ID codes and ground lock ID codes, communicates with the server side to transmit information, and writes the information into the server side. Optionally, the user side may be a mobile phone client, and the user registers and sets the information through a mobile phone APP.

The server side receives and stores the vehicle identification information, the charging pile ID code and the ground lock ID code which are sent by the user side and authorized, and sends the vehicle identification information and the ground lock ID code to the corresponding charging pile according to the charging pile ID code. Optionally, the server side is a cloud platform.

And the charging pile is used for receiving and storing authorized vehicle identity identification information sent by the server side and performing primary authentication and secondary authentication when the electric automobile is intelligently charged. The charging pile receives and stores the ground lock identification information at the same time, and communication is established with the ground lock through the ground lock identification information.

In some embodiments, the user terminal and the server terminal, and the server terminal and the charging pile communicate with each other through a mobile communication network to transmit information. Optionally, the mobile communication network is a 4G network. Optionally, the mobile communication network is a 5G network. In other embodiments, the user terminal and the server terminal, and the server terminal and the charging pile may communicate and transmit information through the internet in a wireless or wired manner.

Fig. 2 discloses a flow chart of a setting method of vehicle information and charging pile identity information according to an embodiment of the invention, and a further description is given to the setting method of the vehicle and charging pile identity information with reference to fig. 2. The car owner writes the information into the cloud platform through 4G technology through the vehicle VIN code, the charging pile ID code and the ground lock ID code input interface reserved by the mobile phone APP, the cloud platform stores the information, and the vehicle VIN code and the ground lock ID code are further written into the charging pile.

The vehicle and the charging pile identity identification information setting method can flexibly manage the charging pile, authorized vehicle identity identification information is set through remote addition of the user side, the private charging pile can be shared and used by other electric vehicle users, and meanwhile when the ground lock is replaced, the matching configuration of the charging pile and the ground lock can be automatically realized by the users.

According to the intelligent charging method for the electric automobile, a series of communication signal transmission needs to be carried out among the electric automobile, the charging pile and the ground lock. And wireless communication can be adopted among the electric automobile, the charging pile and the ground lock. The wireless communication mode can be a Bluetooth mode, a Wi-Fi mode or a Zigbee mode. In other embodiments, the charging pile and the ground lock can communicate in a wired mode. Preferably, the intelligent charging method adopts a Bluetooth mode for communication, and compared with other modes, the Bluetooth mode has higher safety level, lower power consumption and lower cost under the same condition.

Each step of the intelligent charging method for an electric vehicle provided by the present invention is described in detail below by taking a bluetooth mode as an example.

Step S101: the charging pile searches for the communication signal of the electric automobile.

When the electric automobile drives to the charging pile, the Bluetooth device of the automobile needs to be in a mode capable of being searched all the time. The charging pile continuously searches for Bluetooth communication signals sent by peripheral Bluetooth equipment at a certain search period.

Step S102: and the communication signal meets the communication condition, and the charging pile receives the vehicle identity identification information sent by the electric automobile and carries out primary authentication.

The Bluetooth communication signal meets the communication condition that when the electric automobile drives to the charging pile, the relative distance between the electric automobile and the charging pile is smaller than the preset distance, the charging pile detects that the automobile enters a recognizable area, and the Bluetooth signal intensity received by the charging pile is continuously monitored to be larger than a set threshold value. The electric automobile and the charging pile start a handshake flow to perform primary authentication.

The one-time authentication means that the charging pile compares the received vehicle identification information with authorized vehicle identification information, and if the information is matched correctly, the one-time authentication is passed, and a plug-and-charge mode is entered. The "plug and charge" mode is entered, i.e., the secondary authentication process in step S103 is entered.

Fig. 3 is a flowchart illustrating a one-time authentication process between a vehicle and a charging pile according to an embodiment of the present invention, in the embodiment illustrated in fig. 3, the one-time authentication process means that an electric vehicle sends an encrypted VIN code to the charging pile, and the charging pile decrypts the received encrypted VIN code and compares the decrypted VIN code with an authorized VIN code received and stored from a server in advance. If the information is matched correctly, the authentication is passed once, and a plug-and-play mode is entered.

In some embodiments, if the first "handshake flow" setup fails and one authentication fails, then the "Standby" mode is entered. The 'Standby' mode refers to that in the working mode, the charging pile actively establishes a 'handshaking flow' again, repeatedly initiates authentication within preset time, and enters a 'plug and charge' mode if the authentication passes, and if the 'handshaking flow' fails after the preset time and the authentication does not pass, the charging pile enters a sleep mode. In the embodiment shown in fig. 3, the preset time is 5 minutes. After charging pile enters sleep mode, the miniature circuit breaker of charging pile and two relays of input power supply are all disconnected, the LED indicator lamp is turned off, communication modules such as Bluetooth module enter low power consumption mode, and the power consumption of charging pile is reduced to below 5 w.

Fig. 4 discloses a flow chart of the ground lock ascending according to an embodiment of the invention, as shown in fig. 4, after the vehicle and the charging pile pass one-time authentication, the charging pile descends the ground lock under the control of bluetooth, the ground lock motor rotates forwards, the ground lock descends to a specified position, and the state information of the ground lock is fed back to the charging pile. The state indicator lamp of the charging pile changes correspondingly. Optionally, the status indicator light changes from blue to green.

If the vehicle and the charging pile are not authenticated once, the ground lock cannot descend, and the vehicle and the charging pile enter a sleep mode instead. The dormant mode of the ground lock means that the ground lock Bluetooth module enters a low power consumption state, the ground lock stops communicating with a charging pile, power supply to a ground lock motor is cut off, and the ground lock does not execute the functions of detection of a covering object and the like.

The key technical difficulty of step S101 and step S102 is how to determine to start the "handshake process" and establish the time for one authentication, so that the consistency of the driver in driving and parking the parking space is not affected. In order to solve the problems, the two parameters of the Bluetooth searching time period and the paired Bluetooth signal strength are calibrated by simulating different use conditions of a driver and the influence of the surrounding driving environment on the Bluetooth signals. Preferably, the time period of searching the bluetooth signal by the charging pile is 6s, and when the set distance is 50m, the set threshold of the bluetooth signal intensity is 43 dB.

Step S103: and receiving a charging gun inserting signal sent after the electric automobile is inserted into the charging gun by the charging pile, and performing secondary authentication.

And the vehicle and the charging pile Bluetooth correctly establish a link, enter a charging starting process after the first authentication is passed, and perform a second authentication step. The step mainly solves the key step of safe 'trigger condition of alternating current charging', thereby realizing 'plug and charge' mode.

After the charging gun is inserted into the charging interface of the vehicle, the vehicle sends a gun insertion signal of the charging gun to the charging pile for secondary authentication. The secondary authentication means that the charging pile compares the vehicle identification information of the electric vehicle contained in the charging gun insertion signal with authorized vehicle identification information, if the information is matched correctly, the secondary authentication is passed, and the charging pile starts a charging mode to charge the electric vehicle. And if the secondary authentication is not passed, the charging pile does not charge the electric automobile.

Fig. 5 discloses a flow chart of secondary authentication between a vehicle and a charging pile according to an embodiment of the present invention, in the embodiment shown in fig. 5, after the vehicle waits for a charging gun to be inserted into a charging interface, a charging gun insertion signal CC (Connection Confirm) state is encrypted and then sent to a charging pile end that has been successfully paired through bluetooth, the charging pile decrypts and compares received information, determines whether the information is authorized vehicle identification information, and if the information comparison is successful, the charging pile waits for an S2 switch of an OBC (On-board charger) to be closed and then enters a charging mode.

In one embodiment, the CC signal is a charging connection confirmation signal defined in GB/T18487.1-2015.

In one embodiment, the S2 switch is a switch controlled by the car charger on a CP (Control Pilot) signal line for switching functions between the electric vehicle and the electric vehicle power supply device, as defined by GBT 7487.1-2015.

In some embodiments, if the secondary authentication fails, the charging pile actively initiates the secondary authentication repeatedly within a preset time, and continues decryption and comparison processing until the secondary authentication fails after the preset time, and then the charging pile enters the sleep mode. In the embodiment shown in fig. 5, the preset time is 5 minutes.

The key point of step S103 is to provide a "plug and charge" function, that is, the driver does not need to start charging by swiping a card or using a mobile phone APP as in the current market, and a safe and reliable technical scheme that the direct-insertion gun is charged by using a secondary authentication mode is provided. The advantage of this technical scheme is safe and reliable, can avoid filling electric pile and being stolen by other people.

The invention provides an intelligent charging method for an electric automobile, which further comprises the following steps:

step S104: the charging mode is finished, and the charging pile enters different working modes according to whether the charging gun is pulled off from the vehicle.

If the charging gun is not pulled out, the charging pile is in a charging waiting mode within preset time, and after the preset time, the charging pile enters a sleep mode, wherein the charging waiting mode refers to that the charging request is directly responded without authentication when the electric automobile initiates the charging request again.

If the charging pile is pulled out of the vehicle, the charging pile enters a sleep mode.

Fig. 6 discloses a flow chart of ending ac charging of the vehicle according to an embodiment of the invention, and the ac charging ending flow of step S104 is further described below with reference to fig. 6.

The vehicle passes through with the secondary authentication who fills electric pile, fills electric pile and begins the mode of charging, and when the mode of charging ended, it pulls out the different states of entering according to the rifle that charges whether from the car to fill electric pile. The end of the charging mode mainly comprises that a vehicle is fully charged or not fully charged, a driver actively stops charging, and a non-charging pile tip actively stops charging due to faults.

When the charging mode is finished, the S2 switch corresponding to the OBC is turned off, and it is determined whether or not the charging gun is pulled out from the charging port of the vehicle.

If the charging gun is directly pulled out of the vehicle, the charging pile directly enters the sleep mode. At this time, it is considered that the driver intends to actively end the charging process and drive the vehicle away.

If the charging gun is not pulled out from the charging port of the vehicle, the charging pile is in a waiting charging mode within preset time, and after the preset time, the charging pile enters a sleep mode. The waiting charging mode is that within the preset time, the vehicle initiates a charging request again, the corresponding S2 switch is closed, the charging pile directly recovers alternating current charging, and secondary authentication is performed without identity comparison again.

The preset time can be adjusted according to the fault handling mechanism of the actual OBC. In the embodiment shown in fig. 5, the preset time is 5 minutes.

The charging mode ending process has the advantages that when the vehicle-end charging system has a recoverable fault, under the condition of no supervision, after the vehicle-end charging system recovers from the fault, the alternating current charging can be continued.

After the vehicle charging mode of step S104 is finished, the method may further include notifying the charging pile when the ground lock detects that there is no foreign object above, controlling the ground lock to rise by the charging pile, determining by the charging pile that the intensity of the communication signal of the electric vehicle is lower than a preset threshold, and notifying the ground lock to enter a sleep mode.

Fig. 7 is a flowchart illustrating a process of descending the ground lock according to an embodiment of the present invention, in which the ground lock performs foreign object detection at a certain search period to determine whether a covering exists above the ground lock in the embodiment shown in fig. 7.

When its foreign matter detection passes through, when no cover above the ground lock promptly, the ground lock can inform this state to fill electric pile, fills electric pile and sends the ground lock through the bluetooth and rise the order, and the control ground lock rises. The ground lock motor reverses to the assigned position, feeds back its state information to charging pile. The state indicator lamp of the charging pile changes correspondingly. Optionally, the status indicator light changes from green to blue.

When the intensity of the Bluetooth signal received by the charging pile is smaller than a set threshold value, the charging pile informs the ground lock to enter a sleep mode when judging that the vehicle drives away.

In the embodiment shown in fig. 7, the search period of foreign object detection performed by the ground lock is 3s, and the set threshold of the intensity of the bluetooth signal received by the charging pile is 35 dB.

After the vehicle charging mode of step S104 is finished, the method may further include opening a switch of a gun line recycling mechanism at the top of the charging pile after the charging gun is pulled off from the vehicle and inserted into a designated position, and drawing the charging gun line by the gun line recycling mechanism.

In order to realize the intelligent charging method of the electric automobile, the invention provides an electric automobile charging system which comprises a ground lock, a server side, a user side and a charging pile.

The electric automobile comprises a first communication module, wherein the first communication module is responsible for establishing communication with the charging pile and carrying out primary authentication. Preferably, the first communication module is a low-power-consumption Bluetooth module and is responsible for establishing Bluetooth pairing with the charging pile and performing primary authentication.

The ground lock has a foreign matter detection function, carries out foreign matter detection according to a certain period, detects the top and notifies the charging pile without foreign matters, and the charging pile descends after receiving a charging pile instruction. The ground lock comprises a second communication module, and the second communication module is responsible for receiving a charging pile instruction to control the ground lock to ascend and descend. Preferably, the second communication module is a bluetooth low energy module.

The server side receives and stores vehicle identification information, charging pile identification information and ground lock identification information which are sent by the user side and authorized, and sends the vehicle identification information and the ground lock identification information to the corresponding charging piles according to the charging pile identification information.

Furthermore, the server receives and stores the data uploaded by the charging pile, and sends the data uploaded by the charging pile to the user side. Optionally, the server side is a cloud platform.

The user side sets vehicle identification information needing authorization, charging pile identification information and ground lock identification information, communicates with the server side to transmit information, and writes the information into the server side, so that the private charging pile can be shared and utilized.

Furthermore, the user side receives and stores charging pile data sent by the server side, so that charging piles can be managed, a retrieval function can be executed, and the fault state and the software version of the charging piles can be automatically checked manually or periodically.

Optionally, the user side may be a mobile phone client, and the user registers and sets the information through a mobile phone APP.

The charging pile receives and stores authorized vehicle identification information sent by the server side and is used for primary authentication and secondary authentication when the electric automobile is charged intelligently. The charging pile receives and stores the ground lock identification information at the same time, and communication is established with the ground lock through the ground lock identification information.

The primary authentication and the secondary authentication are described in detail in the above intelligent charging method for an electric vehicle, and are not described herein again.

The charging pile further comprises a third communication module, and the third communication module is responsible for establishing communication with an authorized electric automobile, performing primary authentication, and simultaneously receiving and sending authorized vehicles, charging piles and ground lock identification information.

Preferably, the third communication module includes a bluetooth low energy module and a mobile communication module. The low-power-consumption Bluetooth module is responsible for establishing Bluetooth pairing with an authorized electric automobile and performing primary authentication. The mobile communication module is responsible for receiving and sending authorized vehicles, charging piles and ground lock identification information. The mobile communication module may further be a 4G communication module or a 5G communication module.

Fill electric pile further includes rifle line and retrieves the mechanism, and the auxiliary charging equipment promptly opens the switch that the rifle line was retrieved the mechanism, and the rifle line that charges is retrieved the mechanism and is dragged and draw in by the rifle line to can retrieve the rifle line that charges automatically, avoid the rifle line that charges to drag ground, by the vehicle roll etc..

Fig. 8 is a structural view of a top mechanism of an auxiliary charging apparatus according to an embodiment of the present invention, and fig. 9 is a view illustrating a complete effect of the auxiliary charging apparatus according to an embodiment of the present invention.

The auxiliary charging device top mechanism 800 comprises a fixer 801, a steel wire rope limiter 802, a gun wire fixing head 803, a steel wire rope reel 804, a differential motor 805 and a control circuit board 806.

The holder 801 is a mechanism that holds the differential motor 805 and the wire reel 806. The wire rope stopper 802 defines a movement path for recovering the wire rope, the gun wire fixing head 803 is used for fixing the gun wire, and the wire rope reel 804 is used for rotatably recovering the gun wire. The differential motor 805 provides power to achieve auxiliary recovery of the charging gun line.

When the gun line needs to be recovered, a gun line recovery switch of the auxiliary charging equipment is turned on, and a recovery button signal is triggered. When the control circuit board 806 receives the recovery button signal, the differential motor 805 operates to drive the steel wire reel 804 to rotate, so as to recover the steel wire.

Simultaneously based on the human-machine engineering consideration, the cylinder design height of supplementary battery charging outfit is 1.8 meters, and the rifle socket is 1.3 +/-0.1 meters apart from the ground, and the fixed central point that fills electric pile is 1.5 +/-0.1 meters apart from the ground height to make things convenient for most Chinese convenient for operation.

While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the methodologies are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.

Claims

1. An intelligent charging method for an electric automobile is characterized by comprising the following steps:

if the vehicle identification information of the electric vehicle contained in the charging gun inserting signal is consistent with the authorized vehicle identification information, the secondary authentication is passed, the charging pile starts a charging mode to charge the electric vehicle, and if the vehicle identification information is inconsistent with the authorized vehicle identification information, the secondary authentication is not passed;

when the electric automobile is fully charged or the charging process is actively stopped, and the charging pile is not pulled out of the automobile, the charging pile is in a charging waiting mode within preset time, and after the preset time, the charging pile enters a sleep mode, wherein the charging waiting mode refers to that when the electric automobile initiates a charging request again, the charging request is directly responded without authentication.

2. The intelligent charging method for the electric automobile according to claim 1, wherein the ground lock does not descend when the primary authentication fails, and the charging pile does not charge the electric automobile when the secondary authentication fails.

3. The intelligent charging method for the electric automobile according to claim 1, wherein after the authentication fails, the charging pile repeatedly initiates the authentication within a preset time, and if the authentication fails after the preset time, the ground lock does not descend, and the charging pile enters a sleep mode.

4. The intelligent charging method for the electric vehicle as claimed in claim 1, wherein when the electric vehicle is fully charged or the charging process is actively stopped, the charging pile is pulled out from the vehicle, and the charging pile enters the sleep mode.

5. The intelligent charging method for the electric vehicle as claimed in claim 1, wherein the ground lock detects that no foreign object is located above the ground lock, the charging pile is notified, the charging pile controls the ground lock to ascend, the charging pile judges that the intensity of the communication signal of the electric vehicle is lower than a preset threshold value, and the ground lock is notified to enter the sleep mode.

6. The intelligent charging method for the electric automobile according to claim 1, wherein the communication signal meeting the communication condition is that when the electric automobile drives to the charging pile, the relative distance between the electric automobile and the charging pile is smaller than a preset distance, and the intensity of the communication signal received by the charging pile is larger than a set threshold value.

7. The intelligent charging method for the electric vehicle as claimed in claim 6, wherein the preset distance is 50 meters, the set threshold of the communication signal strength is 43dB, and the time period for the charging pile to search for the communication signal of the electric vehicle is 6 s.

8. The intelligent charging method for the electric automobile according to claim 1, wherein the server receives and stores authorized vehicle identification information, charging pile identification information and ground lock identification information set by the user side, and sends the authorized vehicle identification information and the ground lock identification information to the corresponding charging pile according to the charging pile identification information sent by the user side.

9. The intelligent charging method for the electric automobile according to claim 8, characterized in that:

the user side is a mobile phone client side and communicates with the server side through a mobile communication network to transmit information;

10. The intelligent charging method for the electric vehicle as claimed in claim 8, wherein the charging pile receives and stores authorized vehicle identification information for primary authentication and secondary authentication, receives and stores ground lock identification information, and establishes communication with the ground lock through the ground lock identification information.

11. The intelligent charging method for the electric automobile according to claim 1, wherein wireless communication is adopted among the electric automobile, the charging pile and the ground lock, and the wireless communication mode is one of a Bluetooth mode, a Wi-Fi mode and a Zigbee mode.

12. The intelligent charging method for the electric automobile according to claim 1, wherein the vehicle identification information is a vehicle identification number, a vehicle engine number or a license plate number.

13. The intelligent charging method for the electric automobile according to claim 1, wherein after the charging gun is pulled off from the automobile and inserted to a specified position, a switch of a gun line recycling mechanism at the top of the charging pile is opened, and the charging gun line is dragged and collected by the gun line recycling mechanism.

14. The utility model provides an electric automobile intelligent charging system which characterized in that includes:

the ground lock comprises a communication module, and the communication module is responsible for receiving a charging pile instruction to control the ground lock to ascend and descend;

the charging pile receives a charging gun inserting signal sent by the electric automobile after the electric automobile is inserted into the charging gun, and performs secondary authentication;

when the electric automobile is fully charged or the charging process is actively stopped, and the electric automobile is not pulled out of the automobile, the charging pile is in a charging waiting mode within preset time, and after the preset time, the charging pile enters a sleep mode, wherein the charging waiting mode refers to that when the electric automobile initiates a charging request again, the charging request is directly responded without authentication.

15. The intelligent charging system for electric vehicles according to claim 14, wherein the charging pile further comprises a gun line recycling mechanism, a switch of the gun line recycling mechanism at the top of the charging pile is opened, and the charging gun line is drawn by the gun line recycling mechanism.

16. The intelligent charging system for electric vehicles according to claim 15, wherein the gun line recycling mechanism comprises a differential motor and a steel wire rope reel, and when a switch of the gun line recycling mechanism is turned on, the differential motor drives the steel wire rope reel to rotate, and the charging gun line is collected and recycled by the steel wire rope reel.

17. The intelligent charging system for electric vehicles according to claim 14, wherein the ground lock performs foreign object detection according to a certain period, and notifies the charging pile of the detection of no foreign object above, and descends after receiving the charging pile command.