CN111932780B

CN111932780B - Power management system based on block chain technology

Info

Publication number: CN111932780B
Application number: CN202010665679.1A
Authority: CN
Inventors: 戚湧; 张同庆; 程晓光
Original assignee: Nanjing University of Science and Technology
Current assignee: Nanjing University of Science and Technology
Priority date: 2020-07-11
Filing date: 2020-07-11
Publication date: 2022-03-04
Anticipated expiration: 2040-07-11
Also published as: CN111932780A

Abstract

The invention belongs to the technical field of power management, and particularly relates to a power management system based on a block chain technology, which comprises a server side, a mobile side and a charging pile; the server side runs in a cloud server; the mobile terminal is provided with a mobile phone, a tablet personal computer, a vehicle-mounted navigation device and other network-connectable intelligent equipment; the server side is used for processing and analyzing information sent by the mobile side and the charging pile and returning a processing result; the charging pile is used for charging the electric automobile; the data and the instructions received and sent by the server are stored in the corresponding master authority block chain network for backup and storage; the charging method and the charging system have the advantages that the charging process is simple, the waiting time before the charging of the user is short, the user experience is good, mutual trust authentication is provided before the charging, during the charging and during the payment, the fund safety of the user and the vehicle charging safety are guaranteed, meanwhile, the compatibility of the charging pile is high, and most vehicles can be charged.

Description

Power management system based on block chain technology

Technical Field

The invention belongs to the technical field of power management, and particularly relates to a power management system based on a block chain technology.

Background

The Block chain (Block chain) technology is a novel application mode of computer technologies such as distributed data storage, point-to-point transmission, a consensus mechanism, an encryption algorithm and the like. The consensus mechanism is a mathematical algorithm for establishing trust and obtaining rights and interests among different nodes in a blockchain system, and is characterized by decentralization and public transparency. The blockchain is an important concept of the bitcoin, and is essentially a decentralized database and also serves as an underlying technology of the bitcoin. The block chain is a series of data blocks which are produced by using a cryptographic method in a correlation manner, each data block contains information of one-time bitcoin network transaction and is used for verifying the validity (anti-counterfeiting) of the information and generating the next block, meanwhile, due to a data block generation mechanism in the block chain, modification can be successfully completed only when the uplink data is modified by more than half of nodes, and modification operation is recorded on the chain to provide an accurate basis for data tracing, so that the data on the block chain cannot be forged, fictitious and falsified, and the data is guaranteed to be public and transparent.

At present, with the encouragement of national policy and the joining of internet enterprise, new energy automobile development's faster and faster market is bigger and bigger, but the electric automobile problem of charging that nevertheless comes therewith also seems more and more outstanding, wherein, the electric pile quantity that fills of construction is more and more, but fill electric pile's affiliation diverse, most electric pile is idle for a long time, and simultaneously, the personnel that need charge seek to fill electric pile is comparatively difficult, it charges for the car to be difficult to find to fill electric pile, and simultaneously, these qualities that fill electric pile are different, compatibility is lower, often lead to the car owner to be unable to use to fill electric pile and charge because of incompatible, influence the car owner and use. Therefore, a shared charging pile is established, charging pile resources are reasonably distributed, the charging pile is prevented from being idle, the compatibility of the charging pile is improved, and the problem that the charging pile is difficult to find when a car owner charges the car is solved, so that a feasible scheme is formed

The system comprises a field controller, an RFID identification module, a display screen, a database, a rectification and transformation module and a relay, wherein the RFID identification module, the display screen, the database, the rectification and transformation module and the relay are connected to the field controller, the relay is connected with a charging connector through the charging connector, and the rectification and transformation module is connected to a power line through a safety device; by installing the RFID chip in the shared automobile and recording the charging parameters of the automobile type into the RFID chip, during charging, the charging pile reads the RFID chip in the corresponding vehicle through the RFID identification module, acquires the charging parameters and sends the charging parameters to the field controller, the field controller controls the relay and the rectifier transformer to act according to the charging parameters, in the scheme, the compatibility of the charging pile is improved by acquiring the vehicle charging parameters, but in the using process, a user carries out more preposed operation processes before charging, the waiting time of the user is longer, the user experience is poor, and simultaneously, there is no authentication process for the vehicle and the user during the charging process, and the user may have a possibility of being deceived by a counterfeit charging post, resulting in a loss of funds or damage to the vehicle by the user, and at the same time, in the charging process, the charging pile is charged simultaneously in the same region, and the pressure on a power grid is large during the peak time of power consumption.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems of low popularity and poor compatibility of the charging pile and the authentication problems of the charging pile before charging, during charging and after charging is completed in the using process, the invention provides a power management system based on a block chain technology.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention discloses a power management system based on a block chain technology, which comprises a server end, a mobile end and a charging pile, wherein the server end is connected with the mobile end through a network; the server side runs in a cloud server; the mobile terminal is provided with a mobile phone, a tablet personal computer, a vehicle-mounted navigation device and other network-connectable intelligent equipment; the server side is used for processing and analyzing information sent by the mobile side and the charging pile and returning a processing result; the charging pile is used for charging the electric automobile; the data and the instructions received and sent by the server are stored in the corresponding master authority block chain network for backup and storage;

the server side comprises a communication module, an analysis module, a storage module, a navigation module and a charging module;

the mobile terminal comprises a communication module, a positioning module, a verification module and a payment module; when a user installs the mobile terminal for the first time, the user inputs vehicle model information, the information input by the user is sent to the server terminal through the communication module of the mobile terminal and is stored in the storage module, and the mobile terminal does not store the user information; when the mobile terminal is installed, the mobile terminal needs to be input and bound with the correlation code; the mobile terminal can be connected with a central control system of the electric automobile through Bluetooth; the same electric vehicle can have a plurality of mobile terminals, but only the mobile terminal in pairing connection with the vehicle Bluetooth can send data to the server terminal, and other mobile terminals can receive alarm information sent by the server terminal;

the charging pile comprises a power supply module, a positioning module, a control module, a frequency conversion module, a metering module, a sounding module and a communication module; the power module comprises a charging gun; the charging gun is used for directly connecting the vehicle and the charging pile; the charging piles are provided with unique numbers respectively;

the server receives a charging application sent by the mobile terminal, calls vehicle data according to the unique code of the mobile terminal, and the analysis module analyzes according to the vehicle data to determine the unique number of the charging pile meeting the charging requirement; the server side calls current state information of the corresponding charging pile according to the unique number, the unique number of the charging pile in an idle state is screened out through the analysis module, and then the charging pile position information is called through the unique number; the navigation module calls position information and charging pile position information sent by a positioning module on the mobile terminal sending the charging application, plans an optimal path and sends the optimal path to the mobile terminal through the communication module; after receiving the path planning information, the mobile terminal starts navigation and guides a vehicle to travel a route;

after the vehicle to be charged reaches the charging pile, a driver inserts a charging gun on the charging pile into a vehicle charging opening; the power supply module detects that the circuit is connected, sends a charging request signal to the server end through the communication module in the charging pile and sends the position information generated by the positioning module to the server end along with the charging request signal; after the server receives a charging start request signal, the server receives the position information of the mobile terminal sending the charging request, the position information of the mobile terminal and the position information of the charging pile are compared through an analysis unit, when the mobile terminal and the charging pile are confirmed to be within a reasonable error range, the position comparison is judged to be passed, otherwise, the position comparison is judged to be failed, and the server sends a charging rejection signal to the charging pile; after the control module in the charging pile receives the charging refusing signal, the power supply module is controlled to be disconnected, and the sounding module is controlled to send out a prompt tone to prompt a driver to go to a correct charging pile for charging; after the position comparison is passed, the server side sends a verification signal to the mobile side, the mobile side starts a verification module after receiving the verification signal, the identity of the user is verified through a camera or a fingerprint sensor on the intelligent equipment, and after the verification is passed, the mobile side returns a verification passing signal to the server side; after the server end receives the verification passing signal, the server end sends a charging permission signal to the charging pile, and after the charging pile receives the charging permission signal, the control module controls the power supply module to be switched on to start charging the vehicle; the charging pile intermittently adjusts the charging current and voltage through the frequency conversion module in the charging process, and after adjustment is made, the charging pile synchronously transmits adjustment information to the server side; the mobile terminal is connected with a vehicle through Bluetooth, acquires current-voltage change data during charging, which is obtained by a high-precision voltage-current detection system based on a CAN bus on the vehicle, and sends the data to the server terminal; after the server receives the current and voltage change data sent by the charging pile and the mobile terminal, the server compares the two data through the analysis module, judges that the charging state is normal when the two data are within a normal error range, sends a charging continuation signal to the charging pile, continues charging the charging pile, and otherwise judges that the charging state is abnormal, sends a charging termination signal to the charging pile, and terminates charging the charging pile; after the charging pile receives the charging termination signal, the control module controls the power supply module to be disconnected, and meanwhile, the server side sends alarm information to the mobile terminal to remind a user;

when the charging pile starts to charge the vehicle, the metering module in the charging pile starts to meter the consumed charging electric quantity; after the power module in the charging pile detects that the vehicle is charged, a termination signal is sent to the control module and the metering module; after the control module receives the termination signal, the control module controls the power supply module to be disconnected and terminates the charging process; the metering module stops metering after receiving the termination signal and sends the consumed electric quantity data to the server side; after receiving the metering data, the server calculates the charging amount through a charging module, generates a payment link and sends the payment link to the mobile terminal; after the mobile terminal receives the payment link, calling a common payment APP through a charging module for a vehicle owner to complete payment;

when the intelligent charging system works, when a vehicle owner needs to charge the vehicle, the vehicle owner carries out charging application through a mobile end bound with the vehicle, after a server end receives the charging application sent by the mobile end, the server end calls vehicle information in a storage module, the analysis module carries out comparison and analysis to find out the positions of all charging piles meeting the charging requirements in a current area, then the charging piles in use are removed, the positions of the rest charging piles and the positions of the mobile ends are input into a navigation module, and the optimal path reaching the charging piles is planned; when a vehicle arrives at the position of a charging pile, a user inserts a charging gun on the charging pile into a charging port of the vehicle to complete connection, the charging pile automatically sends a charging starting signal to a server after completing connection with the vehicle, the server compares the position information of the charging pile with the current position of a mobile end to confirm whether the charging pile and the mobile end are in the same position, after the comparison is passed, the server sends a signal to the mobile end to confirm the identity of the user, the mobile end is picked up by a person after the mobile end is prevented from being lost, the mobile end is used for initiating a charging application to cause economic loss to the user, after the identity of the mobile end is confirmed, the server sends a charging allowing signal to the charging pile, the charging pile starts to charge the vehicle, meanwhile, after the user inputs user information at the first installation of the mobile end, the information is stored in the server, is not stored locally, and the mobile end can be effectively prevented from being damaged by viruses, the user information is not lost, the safety of the user information and the safety of privacy are ensured, meanwhile, the charging pile generates fluctuation of charging current and voltage through a frequency conversion module in the charging process, the fluctuation information generated by the charging pile is sent to a server, then the server side determines that the charging current and the charging voltage are within a reasonable error range compared with the charging current and voltage change value obtained by the detection of the vehicle self sent by a mobile terminal, the server side sends a continuous charging signal to the charging pile to keep the charging process to be continuous, the charged vehicle can be fully ensured to be invariable all the time during charging through the detection of the fluctuation of the current and the voltage in charging, and the situation that after a user finishes the connection and the separation of the charging pile and the vehicle in the charging process, a charging gun is maliciously pulled down by other personnel and is connected to another vehicle for charging or is directly connected to other power utilization circuits, so that the fund loss of the user is caused, meanwhile, after charging is finished, the charging pile stops charging, electricity consumption data measured by the self-metering module is sent to the server side, the server side receives the electricity consumption data, the charging amount is calculated through the charging module, a payment link is generated, then the server side sends the payment link to the mobile side, the mobile side receives the payment link and calls up a commonly used payment APP, a vehicle owner completes payment, meanwhile, in the whole charging process, the vehicle owner only needs to initiate a charging request at the beginning, then the vehicle owner goes to the location of the charging pile according to returned navigation information, after the vehicle owner arrives at the charging pile, the charging gun is inserted into the charging port of the vehicle, identity verification is carried out by using the mobile side, the vehicle owner can leave, after charging is completed, the vehicle owner returns to the location of the vehicle, pulls down the charging gun and puts back to the charging pile, and then the charging amount payment is completed through the mobile side, the intelligent charging system can leave the vehicle without excessive verification processes in the process, a vehicle owner can quickly complete the charging process, the operation difficulty of a user is reduced, the waiting time is reduced, meanwhile, the vehicle owner can be ensured not to be induced by an illegal charging pile through mutual verification of a mobile terminal, the charging pile and a server terminal which are completed in the background, the charging safety cannot be ensured, meanwhile, the charging pile verifies the vehicle intermittently in the charging process, the charging process can be ensured to be continuously carried out, malicious damage of an outsider is prevented, electricity stealing is carried out in the charging process of the charging pile, the fund loss of the user is caused, meanwhile, a payment link is directly sent by the server terminal after the payment is completed, a common payment APP is called by the mobile terminal for payment, the payment risk can be reduced, and the fund safety is ensured; meanwhile, if an empty charging pile meeting the requirements exists nearby the vehicle owner, the vehicle owner can apply for starting charging by inputting the unique number on the charging pile at the mobile terminal, the server terminal performs verification, and the normal charging process is started after the verification is completed; meanwhile, an authentication program, a control instruction and a payment instruction which are generated in the charging process and are matched with each other among the server terminal, the mobile terminal and the charging pile are uploaded to the master block chain network by the server terminal, and a key authentication process and payment information are recorded and recorded in the block chain network for inquiry, so that the server terminal is prevented from being attacked by a network to cause the loss or the falsification of the stored data of the server terminal, meanwhile, the authentication in the payment process is completed by means of the master block chain network, and the payment safety is improved.

Preferably, after the power supply module in the charging pile is linked with the electric automobile, charging protocols of vehicles of different brands can be automatically identified; after the charging pile obtains a specific charging protocol of a vehicle to be charged, the charging pile sends the characteristic content of the charging protocol to a server side; after receiving the characteristic content of the charging protocol, the server determines current and voltage data output by the charging pile during charging through the analysis module, and sends the data back to the charging pile; after receiving the data, the charging pile changes the current and the voltage output by the charging pile through the frequency conversion module, so that the current and the voltage meet the requirements of a charging protocol, and the charging process is completed;

during operation, fill electric pile after discernment charging agreement, through the concrete agreement content that the server end returns, utilize frequency conversion module to control output current voltage, make it accord with the charging agreement requirement, accomplish the charging process, the effectual compatibility that improves and fill electric pile, make and fill electric pile and can charge to different brand vehicles, improve and fill electric pile application range, reduce cost and input, simultaneously, fill electric pile compatibility through improving and increase relatively and fill electric pile use quantity, reduce the car owner and look for the degree of difficulty of filling electric pile when charging for the vehicle, improve the satisfaction in the car owner use, enlarge the user group, reduce cost and input.

Preferably, the charging pile comprises a charging analysis module; the charging analysis module collects and analyzes data fed back by a vehicle battery when a charging pile charges a vehicle, and sends an analysis result to the server; after receiving the battery data, the server side analyzes the battery data based on big data accumulated by long-term use, determines the health degree of the battery and obtains an analysis result; when the battery health state is extremely poor and a charging accident is caused, the server side sends a charging termination signal to the charging pile to stop the charging process of the charging pile on the vehicle; after the server sends a charging stop signal, an early warning signal is sent to the mobile terminal to remind a user of checking the vehicle in time; after receiving the early warning signal, the mobile terminal continuously sends out a prompt, and the user stops prompting after manually confirming the prompt; after the mobile terminal is connected with a vehicle central control system, battery data obtained by monitoring the vehicle is sent at random intervals, and the data is sent to a server terminal; after receiving the battery data sent by the mobile terminal, the server terminal compares the battery data with the data obtained by the charging pile and analyzes the data, and the battery health state data is obtained after the data is integrated; the charging pile stops charging after the vehicle finishes charging, and sends a charging completion signal to the server side, and the server side sends a charging completion notification to the mobile side after receiving the signal; the charging completion notification is sent once immediately after charging is completed, and then is sent once every 8 hours, and is sent once every 2 hours after 24 hours; after the charging fee is calculated by the charging module, the server side calculates the overtime fee according to different time after the vehicle which does not leave for more than 24 hours and records the overtime fee into the next charging fee; the charging completion notification can be selected to confirm after receiving the primary reminding, and the charging completion notification is forced to remind once every 24 hours, so that the notification sending frequency is greatly reduced;

when the charging system works, the server side comprehensively analyzes charging battery data returned by the charging pile and the mobile terminal through the analysis module to obtain the health state of the battery, compares the pre-accident data of the battery collected by the mobile terminal, controls the charging pile to stop charging and timely sends a prompt to the mobile terminal before the battery is possible to have a charging accident, and ensures that the prompt operation is stopped after the user receives the prompt, meanwhile, after the charging is finished, the charging pile stops charging, the server side sends a payment link to the mobile terminal to wait for the user to pay charging cost, meanwhile, after the charging is finished, the server side sends a notice to the mobile terminal to prompt the user to move the vehicle away, so that the vehicle is prevented from being parked before the charging pile for a long time after the charging is finished, the charging pile resources are occupied, meanwhile, the vehicle which exceeds 24 hours is parked after the charging is finished, the notice frequency is improved, and overtime cost is charged, the combination is included in the charge that charges next time, through collecting overtime expense, reduces the car owner and parks the vehicle overlength time, improves and fills electric pile rate of utilization, simultaneously, through reminding many times, avoids the car owner to park for a long time and causes the high price to deduct fees, reduces car owner's payment expense.

Preferably, after the vehicle starts to be charged, the server side performs predictive analysis through an analysis module according to historical charging data of the vehicle to obtain a predicted charging time; the server side comprehensively analyzes the vehicles which are being charged by the charging piles in the same area, divides the charging time of the vehicles, enables the vehicles to be intermittently charged, and reduces the number of the vehicles which are charged at the same time in the area; the server predicts the time interval between charging of the vehicle and the time interval of the vehicle staying after charging is finished through the analysis module, and plans longer total charging time and more charging interval time for the vehicle with longer staying time interval; the charging scheme planned by the server side has two schemes of longer time and shorter time; in the scheme with short charging time, the charging pile continuously charges the vehicle until the vehicle is fully charged; in the scheme of longer charging time, the electric quantity of the battery is quickly and continuously charged to 50% of the rated capacity when the charging pile starts, and then intermittent charging is adopted to relatively prolong the charging time; after the server terminal finishes planning, the predicted charging completion time is sent to the mobile terminal, and a user can select a charging scheme with longer or shorter predicted charging time according to own will; the charging scheme with the expected longer charging time has relatively lower charging amount to be paid; the server side defaults to execute a charging scheme with longer pre-selected charging time;

when the charging system works, after a vehicle starts to be charged, a server end obtains two charging schemes of long and short based on historical charging and parking time data after charging, the charging scheme is selected by a vehicle owner, when the vehicle owner does not select, the long-time charging scheme is acquiescently adopted, the vehicle in the current area is ensured to be charged intermittently through the integral planning of the server end, the number of vehicles which are being charged in the same time is reduced, the load of a power grid is reduced, the stability of the power grid is improved, the power utilization safety is ensured, meanwhile, the charging time of the vehicle can be relatively prolonged through the intermittent charging after the planning, the impact of short-time charging on a battery is reduced, the service life of the battery is prolonged, meanwhile, the intermittent charging can ensure that partial electric quantity exists in the battery, the battery is prevented from being used without electric quantity when the vehicle owner is in emergency, the vehicle owner is delayed to take the vehicle, and the vehicle owner loss is caused, meanwhile, the intermittent charging is adopted, the heating caused by the quick and continuous charging of the battery can be reduced, the charging temperature and the charging pressure of the battery are reduced, the charging safety of the battery is improved, the service life of the battery is prolonged, meanwhile, the long-time charging scheme is selected, the capital cost of a vehicle owner can be reduced, and the use cost of the vehicle owner is reduced.

Preferably, an infrared detector is installed in the charging pile and used for detecting whether a vehicle exists in front of the charging pile or not; a protective cover is arranged on the end face of the charging shell; the conductive needle is arranged in the protective cover; the conductive pin is inserted into a corresponding jack in a vehicle charging port and communicated with a charging circuit; a third mounting groove and a first mounting groove are formed in the shell; the first mounting grooves are radially distributed in the shell, and openings of the first mounting grooves are located on the side face of the shell; the mounting grooves III are distributed in the shell along the axial direction; the first mounting groove is communicated with the third mounting groove; an electromagnet is arranged in the mounting groove III; the electromagnet is a one-way holding electromagnet; an extension rod of the electromagnet is provided with a first conducting ring and a second conducting ring; the distance between the first conducting ring and the electromagnet is smaller than the distance between the second conducting ring and the electromagnet; a metal sleeve is arranged in the mounting groove III; the metal sleeve can be in contact with the first conducting ring and the second conducting ring; when the electromagnet is not opened, the first conducting ring is in contact with the metal sleeve, and the second conducting ring is not in contact with the metal sleeve; the first conducting ring and the second conducting ring are both electrically connected with a control module in the charging pile; a locking block is arranged in the first mounting groove; one end of the locking block, which is close to the surface of the shell, is arc-shaped, and the arc surface faces the tail end of the shell; an inclined surface is arranged at one end, close to the center of the shell, of the locking block; the inclined surface is contacted with the top end of the extension rod; the locking block and the extension rod are both magnetic and mutually attracted;

when the charging gun is in work, the charging gun is inserted into a charging port of a vehicle, a protective cover on a shell of the charging gun is also positioned in the charging port, a conductive pin on the charging gun is inserted into a corresponding insertion hole in the charging port to conduct a charging circuit, after the charging gun is inserted into the charging port, a control module in the charging pile controls the electromagnet to be started, so that an extension rod of the electromagnet extends out, a locking block in a first mounting groove in the shell is pushed out, the locking block is clamped into a corresponding annular groove in the charging port of the vehicle, the charging gun is fixed on the charging port of the vehicle, the charging gun is prevented from falling off accidentally, meanwhile, as the electromagnet adopts a one-way holding type electromagnet, after the extension rod of the electromagnet extends out, the circuit of the electromagnet is disconnected, the extension rod still keeps an extending state, so that the power supply of the electromagnet can be turned off after the extension rod extends out, and heating caused by long-time electrification of the electromagnet is avoided, the service life of the electromagnet is influenced, meanwhile, due to the mutual attraction between the extension rod and the locking block, when charging is finished, reverse current is introduced into the electromagnet, the extension rod of the electromagnet retracts, when the extension rod retracts, the locking block returns to the original position under the action of the mutual attraction between the extension rod and the locking block, the locking block is in contact with the charging gun to be fixed, the charging gun is convenient to take down from a vehicle charging port, meanwhile, when the charging gun is forcibly pulled by external force, due to the arc-shaped shape of the locking block close to one end of the shell, the locking block is pushed towards the mounting groove I, meanwhile, when the locking block is pushed inwards, the locking block generates extrusion force on the extension rod, when the extrusion force is larger than the retaining force of the electromagnet, the extension rod retracts to the original position, the locking block returns to the mounting groove I under the action of the pushing force, locking is released, and damage to the charging gun and the vehicle charging port caused by the action of excessive external force is avoided, meanwhile, when a vehicle driver forgets to take off the charging gun, the vehicle is driven to leave, the charging gun is clamped on the vehicle, the charging pile is pulled, and the charging pile is damaged, meanwhile, when the extension rod extends out, the first conducting ring on the extension rod is communicated with the second conducting ring through the metal sleeve, the control module receives a conducting signal, controls the power module to be switched on and starts charging, when the conducting signal disappears accidentally during charging, the control module controls the power module to be switched off and stops charging, and sends a charging stopping signal to the server end through the communication module, and after receiving the charging stopping signal, the server end sends a charging accident stopping alarm to the mobile end to prompt a user to check, so that the vehicle cannot finish charging and the use of a vehicle owner is delayed, and meanwhile, the first conducting ring and the second conducting ring are switched on and off, carry out the continuation of physical aspect and verify, guarantee that the charging process goes on in succession, avoid the outsider to use the malicious attack of signal interference equipment to fill electric pile, lead to filling electric pile and server end and be connected the interrupt back, steal the electricity through the rifle that charges, cause user's fund loss.

Preferably, a second mounting groove is formed in the shell; the second mounting groove is distributed along the axial direction of the shell; the outlet of the mounting groove II is positioned on the inner side of the protective cover; a telescopic rod is arranged in the mounting groove II; a spring is arranged in the mounting groove II; the spring is positioned between the telescopic rod and the bottom of the second mounting groove; the telescopic rod extends out of the mounting groove in a normal state; the telescopic rod is not contacted with the conductive needle; an upper contact is arranged at one end, located on the second mounting groove, of the telescopic rod; a lower contact is arranged at the bottom of the mounting groove II; the upper contact and the lower contact correspond to each other and are in contact with each other; the upper contact and the lower contact are both electrically connected with the control module; a coil is arranged in the shell; the mounting groove is positioned inside the coil; the coil is electrically connected with the control module; the telescopic rod is made of a magnetic material;

when the charging device works, after the charging gun is inserted into a charging port of a vehicle, the telescopic rod positioned in the protective cover is extruded by the charging port, the telescopic rod is extruded into the second mounting groove, after the telescopic rod is extruded into the second mounting groove, the upper contact on the telescopic rod is contacted with the lower contact in the second mounting groove, the corresponding circuit is conducted, and a communication signal is sent out, the control module controls the electromagnet to be started after receiving the communication signal, so that the locking block is withdrawn, the charging gun is locked, the phenomenon that the electromagnet is started too early to cause the unlocking of the charging gun, the charging gun is loosened in the charging process to cause the stopping of charging, and the use of the vehicle is influenced, meanwhile, because the telescopic rod is made of a magnetic material, the two mounting grooves are positioned inside the coil, an induced current is generated in the coil when the telescopic rod moves, a notification signal is sent out, and when the charging gun is inserted into the charging port of the vehicle, the telescopic rod moves, the coil sends out a notification signal once, the control module confirms the start of charging after receiving the notification signal, meanwhile, the control module receives the notification signal exceeding the normal error range again after the start of charging, the control module stops the charging process to prevent outsiders from damaging the charging gun and carrying out electricity stealing activities, meanwhile, the control module sends out an active charging stopping reminder to the server end through the communication module, the server end sends out an alarm signal to the mobile end after receiving the reminder to prompt users to check the charging gun, thereby avoiding the loss of the vehicle, simultaneously, the coil generates induced current to improve the sensitivity of the connection verification between the charging gun and the vehicle, and ensures the reliable connection between the charging gun and the vehicle, and simultaneously, due to the existence of the coil, when the outsiders attack the charging pile by adopting interference equipment, the coil generates abnormal current, further sends out the notification signal, and effectively protects the interference attack against the charging pile, improve and fill electric pile security.

The invention has the following beneficial effects:

1. according to the power management system based on the block chain technology, the safety of charging data is improved by recording the backup authentication and the operation instruction through the master block chain network, meanwhile, the safety of the charging process can be improved by mutual authentication among the server terminal, the mobile terminal and the charging pile, the fund safety of a user is guaranteed, meanwhile, the mutual trust authentication performed among the server terminal, the mobile terminal and the charging pile by means of the master block chain network can greatly reduce the preparation operation steps before the user charges, simplify the charging process, realize the charging process of instant charging and payment after charging, improve the feeling of the user in the charging process, improve the viscosity of the user and improve the base number of the user.

2. According to the power management system based on the block chain technology, the current and the voltage in the charging process can be changed at any time through the frequency conversion module arranged in the charging pile and the data support of the server, the support of different charging protocols of vehicles of different brands is realized, the compatibility of the charging pile is improved, the number of the charging piles is relatively increased, the difficulty of a vehicle owner in searching the charging pile is reduced, the popularization rate and the utilization rate of the charging pile are improved, the idling of the charging pile due to the compatibility is reduced, and meanwhile, the cost input is reduced.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a partial cross-sectional view of a charging gun of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a system framework diagram of the present invention;

in the figure: the device comprises a shell 1, a first mounting groove 11, a second mounting groove 12, a third mounting groove 13, a protective cover 2, a conductive needle 3, an electromagnet 4, an extension rod 41, a first conductive ring 42, a second conductive ring 43, a metal sleeve 44, a locking block 5, an expansion link 6, an upper contact 61, a lower contact 62, a spring 63 and a coil 64.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 3, the power management system based on the block chain technology according to the present invention includes a server, a mobile terminal, and a charging pile; the server side runs in a cloud server; the mobile terminal is provided with a mobile phone, a tablet personal computer, a vehicle-mounted navigation device and other network-connectable intelligent equipment; the server side is used for processing and analyzing information sent by the mobile side and the charging pile and returning a processing result; the charging pile is used for charging the electric automobile; the data and the instructions received and sent by the server are stored in the corresponding master authority block chain network for backup and storage;

As an implementation mode of the invention, after a power module in the charging pile is linked with an electric automobile, charging protocols of vehicles of different brands can be automatically identified; after the charging pile obtains a specific charging protocol of a vehicle to be charged, the charging pile sends the characteristic content of the charging protocol to a server side; after receiving the characteristic content of the charging protocol, the server determines current and voltage data output by the charging pile during charging through the analysis module, and sends the data back to the charging pile; after receiving the data, the charging pile changes the current and the voltage output by the charging pile through the frequency conversion module, so that the current and the voltage meet the requirements of a charging protocol, and the charging process is completed;

As an embodiment of the present invention, the charging pile includes a charging analysis module; the charging analysis module collects and analyzes data fed back by a vehicle battery when a charging pile charges a vehicle, and sends an analysis result to the server; after receiving the battery data, the server side analyzes the battery data based on big data accumulated by long-term use, determines the health degree of the battery and obtains an analysis result; when the battery health state is extremely poor and a charging accident is caused, the server side sends a charging termination signal to the charging pile to stop the charging process of the charging pile on the vehicle; after the server sends a charging stop signal, an early warning signal is sent to the mobile terminal to remind a user of checking the vehicle in time; after receiving the early warning signal, the mobile terminal continuously sends out a prompt, and the user stops prompting after manually confirming the prompt; after the mobile terminal is connected with a vehicle central control system, battery data obtained by monitoring the vehicle is sent at random intervals, and the data is sent to a server terminal; after receiving the battery data sent by the mobile terminal, the server terminal compares the battery data with the data obtained by the charging pile and analyzes the data, and the battery health state data is obtained after the data is integrated; the charging pile stops charging after the vehicle finishes charging, and sends a charging completion signal to the server side, and the server side sends a charging completion notification to the mobile side after receiving the signal; the charging completion notification is sent once immediately after charging is completed, and then is sent once every 8 hours, and is sent once every 2 hours after 24 hours; after the charging fee is calculated by the charging module, the server side calculates the overtime fee according to different time after the vehicle which does not leave for more than 24 hours and records the overtime fee into the next charging fee; the charging completion notification can be selected to confirm after receiving the primary reminding, and the charging completion notification is forced to remind once every 24 hours, so that the notification sending frequency is greatly reduced;

As an embodiment of the invention, after the vehicle starts to be charged, the server side performs predictive analysis through an analysis module according to the historical charging data of the vehicle to obtain the predicted charging time; the server side comprehensively analyzes the vehicles which are being charged by the charging piles in the same area, divides the charging time of the vehicles, enables the vehicles to be intermittently charged, and reduces the number of the vehicles which are charged at the same time in the area; the server predicts the time interval between charging of the vehicle and the time interval of the vehicle staying after charging is finished through the analysis module, and plans longer total charging time and more charging interval time for the vehicle with longer staying time interval; the charging scheme planned by the server side has two schemes of longer time and shorter time; in the scheme with short charging time, the charging pile continuously charges the vehicle until the vehicle is fully charged; in the scheme of longer charging time, the electric quantity of the battery is quickly and continuously charged to 50% of the rated capacity when the charging pile starts, and then intermittent charging is adopted to relatively prolong the charging time; after the server terminal finishes planning, the predicted charging completion time is sent to the mobile terminal, and a user can select a charging scheme with longer or shorter predicted charging time according to own will; the charging scheme with the expected longer charging time has relatively lower charging amount to be paid; the server side defaults to execute a charging scheme with longer pre-selected charging time;

As an embodiment of the invention, an infrared detector is installed in the charging pile to detect whether a vehicle is in front of the charging pile; a protective cover 2 is arranged on the end face of the charging shell 1; a conductive pin 3 is arranged in the protective cover 2; the conductive pin 3 is inserted into a corresponding jack in a vehicle charging port and communicated with a charging circuit; a third mounting groove 13 and a first mounting groove 11 are formed in the shell 1; the first mounting grooves 11 are distributed in the shell 1 in the radial direction, and the openings of the first mounting grooves 11 are located on the side face of the shell 1; the mounting grooves III 13 are distributed in the shell 1 along the axial direction; the first mounting groove 11 is communicated with the third mounting groove 13; an electromagnet 4 is arranged in the mounting groove III 13; the electromagnet 4 is a one-way holding type electromagnet; an extension rod 41 of the electromagnet 4 is provided with a first conducting ring 42 and a second conducting ring 43; the distance between the first conducting ring 42 and the electromagnet 4 is smaller than the distance between the second conducting ring 43 and the electromagnet 4; a metal sleeve 44 is arranged in the mounting groove III 13; the metal sleeve 44 may contact the first conductive ring 42 and the second conductive ring 43; when the electromagnet 4 is not opened, the first conducting ring 42 is in contact with the metal sleeve 44, and the second conducting ring 43 is not in contact with the metal sleeve 44; the first conducting ring 42 and the second conducting ring 43 are both electrically connected with a control module in the charging pile; a locking block 5 is arranged in the first mounting groove 11; one end of the locking block 5, which is close to the surface of the shell 1, is arc-shaped, and the arc surface faces the tail end of the shell 1; an inclined surface is arranged at one end of the locking block 5 close to the center of the shell 1; the inclined surface is in contact with the top end of the extension bar 41; the locking block 5 and the extension rod 41 are both magnetic and mutually attracted;

when the charging gun is in operation, the charging gun is inserted into a charging port of a vehicle, a protective cover 2 on a shell 1 of the charging gun is also positioned in the charging port, a conductive needle 3 on the charging gun is inserted into a corresponding jack in the charging port to conduct a charging circuit, after the charging gun is inserted into the charging port, a control module in the charging pile controls an electromagnet 4 to be started, so that an extension rod 41 of the electromagnet 4 extends out, a locking block 5 in a mounting groove I11 in the shell 1 is pushed out, the locking block 5 is clamped into a corresponding annular groove in the charging port of the vehicle, the charging gun is fixed on the charging port of the vehicle, the accidental falling of the charging gun is prevented, meanwhile, as the electromagnet 4 adopts a one-way holding type electromagnet, after the extension rod 41 of the electromagnet 4 extends out, a circuit of the electromagnet 4 is disconnected, the extension rod 41 still keeps an extending state, so that a power supply of the electromagnet 4 can be closed after the extension rod 41 extends out, avoid the electromagnet 4 to generate heat after being electrified for a long time, influence the service life of the electromagnet 4, simultaneously, because the extension bar 41 and the locking block 5 mutually attract, after charging, the reverse current is introduced into the electromagnet 4, so that the extension bar 41 of the electromagnet 4 retracts, when the extension bar 41 retracts, the locking block 5 also returns to the original position under the action of the mutual attraction between the extension bar and the locking block, the locking block 5 is contacted with the charging gun to be fixed, the charging gun is conveniently taken down from the charging port of the vehicle, meanwhile, when the charging gun is forcibly pulled by the external force, because the locking block 5 is close to the arc surface shape at one end of the shell 1, the locking block 5 is pushed towards the mounting groove I11, meanwhile, when the locking block 5 is pushed inwards, the locking block 5 generates the extrusion force to the extension bar 41, when the extrusion force is larger than the holding force of the electromagnet 4, the extension bar 41 retracts to the original position, the locking block 5 retracts to the mounting groove I11 under the action of the thrust, the locking is released, the damage of a charging gun and a vehicle charging port under the action of excessive external force is avoided, meanwhile, when a vehicle driver forgets to take off the charging gun, the vehicle is driven to leave, the charging gun is clamped on the vehicle, the charging pile is pulled, the charging pile is damaged, meanwhile, when the extension rod 41 extends out, the first conducting ring 42 and the second conducting ring 43 on the extension rod 41 are communicated through the metal sleeve 44, the control module receives a conducting signal, the control power supply module is switched on to start charging, when the conducting signal disappears accidentally during the charging process, the control module controls the power supply module to be switched off to stop charging, and sends a charging stop signal to the server end through the communication module, after the server end receives the charging stop signal, the server end sends a charging accident termination alarm to the mobile end to prompt a user to check, the accidental interruption of the charging process can be avoided, and the vehicle cannot be charged, delaying the use of the car owner, simultaneously, conducting and breaking through conducting ring one 42 and conducting ring two 43, carrying out the continuous verification of physical layer, guarantee that the charging process goes on in succession, avoid the outsider to use signal interference equipment maliciously to attack and fill electric pile, lead to filling electric pile and server end and be connected the back of interrupting, steal the electricity through the rifle that charges, cause user's fund loss.

As an embodiment of the present invention, a second mounting groove 12 is formed in the housing 1; the second mounting grooves 12 are distributed along the axial direction of the shell 1; the outlet of the second mounting groove 12 is positioned on the inner side of the protective cover 2; the telescopic rod 6 is arranged in the mounting groove II 12; a spring 63 is arranged in the mounting groove II 12; the spring 63 is positioned between the telescopic rod 6 and the bottom of the second mounting groove 12; the telescopic rod 6 extends out of the mounting groove II 12 in a normal state; the telescopic rod 6 is not contacted with the conductive needle 3; an upper contact 61 is arranged at one end, positioned in the second mounting groove 12, of the telescopic rod 6; a lower contact 62 is arranged at the bottom of the second mounting groove 12; the upper contact 61 and the lower contact 62 correspond to each other and are in contact with each other; the upper contact 61 and the lower contact 62 are both electrically connected with the control module; a coil 64 is arranged in the shell 1; the second mounting groove 12 is positioned inside the coil 64; the coil 64 is electrically connected with the control module; the telescopic rod 6 is made of a magnetic material;

when the charging device works, after a charging gun is inserted into a charging port of a vehicle, the telescopic rod 6 positioned in the protective cover 2 is extruded by the charging port, the telescopic rod 6 is extruded into the second mounting groove 12, after the telescopic rod 6 is extruded into the second mounting groove 12, the upper contact 61 on the telescopic rod 6 is contacted with the lower contact 62 in the second mounting groove 12, a corresponding circuit is conducted, and a communication signal is sent out, after the control module receives the communication signal, the electromagnet 4 is controlled to be started, so that the locking block 5 is pushed out, the charging gun is locked, the electromagnet 4 is prevented from being started too early, the charging gun is not locked, the charging gun is loosened in the charging process, the charging is stopped, the use of the vehicle is influenced, meanwhile, because the telescopic rod 6 is made of a magnetic material, the second mounting groove 12 is positioned in the coil 64, induced current is generated in the coil 64 when the telescopic rod 6 moves, and a notification signal is sent out, when the charging gun is inserted into a charging port of a vehicle, the telescopic rod 6 moves, the coil 64 sends a notification signal once, the control module confirms the start of charging after receiving the notification signal, meanwhile, when the control module receives the notification signal exceeding the normal error range again after the start of charging, the control module stops the charging process, prevents outsiders from damaging the charging gun and performs electricity stealing activities, meanwhile, the control module sends an active charging stopping prompt to the server end through the communication module, the server end sends an alarm signal to the mobile end after receiving the prompt to prompt a user to check, avoids the loss of the vehicle, generates induction current through the coil 64, improves the sensitivity of the connection verification of the charging gun and the vehicle, ensures the reliable connection of the charging gun and the vehicle, and simultaneously, when outsiders attack the charging gun by adopting interference equipment due to the existence of the coil 64, the coil 64 generates abnormal current, and then sends out notice signal, and effective protection is to filling electric pile's interference attack, improves and fills electric pile security.

The specific working process is as follows:

when the charging gun is in operation, the charging gun is inserted into a charging port of a vehicle, a control module in the charging pile controls the electromagnet 4 to be started, so that the extension rod 41 of the electromagnet 4 extends out, the locking block 5 in the mounting groove I11 in the shell 1 is pushed out, the locking block 5 is clamped into a corresponding annular groove in the charging port of the vehicle, meanwhile, as the electromagnet 4 adopts a one-way retaining electromagnet, after the extension rod 41 of the electromagnet 4 extends out, the power supply of the electromagnet 4 is turned off, meanwhile, as the extension rod 41 and the locking block 5 are mutually attracted, after charging is completed, reverse current is introduced into the electromagnet 4, so that the extension rod 41 of the electromagnet 4 retracts, when the extension rod 41 retracts, the locking block 5 returns to the original position under the action of the mutual attraction force between the two, the locking block contacts with the charging gun for fixation, and when the charging gun is forcibly pulled by external force, as the locking block 5 is close to the shape of the arc surface at one end of the shell 1, the locking block 5 is pushed towards the inside of the first mounting groove 11, meanwhile, when the locking block 5 is pushed inwards, the locking block 5 generates extrusion force on the extension rod 41, when the extrusion force is larger than the holding force of the electromagnet 4, the extension rod 41 retracts to the original position, the locking block 5 retracts into the first mounting groove 11 under the action of the pushing force to release locking, meanwhile, when the extension rod 41 extends, the first conducting ring 42 and the second conducting ring 43 on the extension rod 41 are communicated through the metal sleeve 44, the control module receives a conducting signal and controls the power supply module to be switched on and start charging, when the conducting signal disappears accidentally in the charging process, the control module controls the power supply module to be switched off and stop charging, and sends a charging stopping signal to the server end through the communication module, and after the server end receives the charging stopping signal, the server end sends a charging accident stopping alarm to the moving end; after the rifle that charges inserts the vehicle mouth that charges, the telescopic link 6 that is located protective cover 2 receives the extrusion of the mouth that charges, telescopic link 6 is crowded into in mounting groove two 12, back in mounting groove two 12 is crowded into to telescopic link 6, last contact 61 on the telescopic link 6 and the lower contact 62 in mounting groove two 12 contact each other, it switches on to correspond the circuit, send the intercommunication signal, control module receives behind the intercommunication signal, control electro-magnet 4 starts, thereby release locking block 5, the rifle that charges is locked, and simultaneously, when the rifle that charges inserts the vehicle mouth that charges, telescopic link 6 takes place to remove, coil 64 sends once notice signal, control module receives behind the notice signal, confirm to charge and begin.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A power management system based on block chain technology is characterized in that: the system comprises a server end, a mobile end and a charging pile; the server side runs in a cloud server; the mobile terminal is arranged on a mobile phone, a tablet personal computer or a vehicle-mounted navigation device; the server side is used for processing and analyzing information sent by the mobile side and the charging pile and returning a processing result; the charging pile is used for charging the electric automobile; the data and the instructions received and sent by the server are stored in the corresponding master authority block chain network for backup and storage;

the mobile terminal comprises a communication module, a positioning module, a verification module and a payment module; when a user installs the mobile terminal for the first time, the user inputs vehicle model information, the information input by the user is sent to the server terminal through the communication module of the mobile terminal and is stored in the storage module, and the mobile terminal does not store the user information; when the mobile terminal is installed, a correlation code needs to be input for binding; the mobile terminal can be connected with a central control system of the electric automobile through Bluetooth; the same electric vehicle can have a plurality of mobile terminals, but only the mobile terminal in pairing connection with the vehicle Bluetooth can send data to the server terminal, and the mobile terminal in pairing connection with the vehicle Bluetooth can receive alarm information sent by the server terminal;

after the vehicle to be charged arrives at the charging pile, a driver inserts a charging gun on the charging pile into a vehicle charging opening; the power supply module detects that the circuit is connected, sends a charging request signal to the server end through the communication module in the charging pile and sends the position information generated by the positioning module to the server end along with the charging request signal; after the server receives a charging start request signal, the server receives the position information of the mobile terminal sending the charging request, the position information of the mobile terminal and the position information of the charging pile are compared through an analysis unit, when the mobile terminal and the charging pile are confirmed to be within a reasonable error range, the position comparison is judged to be passed, otherwise, the position comparison is judged to be failed, and the server sends a charging rejection signal to the charging pile; after the control module in the charging pile receives the charging refusing signal, the power supply module is controlled to be disconnected, and the sounding module is controlled to send out a prompt tone to prompt a driver to go to a correct charging pile for charging; after the position comparison is passed, the server side sends a verification signal to the mobile side, the mobile side starts a verification module after receiving the verification signal, the identity of the user is verified through a camera or a fingerprint sensor on the intelligent equipment, and after the verification is passed, the mobile side returns a verification passing signal to the server side; after the server end receives the verification passing signal, the server end sends a charging permission signal to the charging pile, and after the charging pile receives the charging permission signal, the control module controls the power supply module to be switched on to start charging the vehicle; the charging pile intermittently adjusts the charging current and voltage through the frequency conversion module in the charging process, and after adjustment is made, the charging pile synchronously transmits adjustment information to the server side; the mobile terminal is connected with a vehicle through Bluetooth, acquires current-voltage change data during charging, which is obtained by a high-precision voltage-current detection system based on a CAN bus on the vehicle, and sends the data to the server terminal; after the server receives the current and voltage change data sent by the charging pile and the mobile terminal, the server compares the two data through the analysis module, judges that the charging state is normal when the two data are within a normal error range, sends a charging continuation signal to the charging pile, continues charging the charging pile, and otherwise judges that the charging state is abnormal, sends a charging termination signal to the charging pile, and terminates charging the charging pile; after the charging pile receives the charging termination signal, the control module controls the power supply module to be disconnected, and meanwhile, the server side sends alarm information to the mobile terminal to remind a user;

after the power supply module in the charging pile is connected with the electric automobile, charging protocols of vehicles of different brands can be automatically identified; after the charging pile obtains a specific charging protocol of a vehicle to be charged, the charging pile sends the characteristic content of the charging protocol to a server side; after receiving the characteristic content of the charging protocol, the server determines current and voltage data output by the charging pile during charging through the analysis module, and sends the data back to the charging pile; after receiving the data, the charging pile changes the current and the voltage output by the charging pile through the frequency conversion module, so that the current and the voltage meet the requirements of a charging protocol, and the charging process is completed.

2. The power management system of claim 1, wherein: the charging pile comprises a charging analysis module; the charging analysis module collects and analyzes data fed back by a vehicle battery when a charging pile charges a vehicle, and sends an analysis result to the server; after receiving the battery data, the server side analyzes the battery data based on big data accumulated by long-term use, determines the health degree of the battery and obtains an analysis result; when the battery health state is extremely poor and a charging accident is caused, the server side sends a charging termination signal to the charging pile to stop the charging process of the charging pile on the vehicle; after the server sends a charging stop signal, an early warning signal is sent to the mobile terminal to remind a user of checking the vehicle in time; after receiving the early warning signal, the mobile terminal continuously sends out a prompt, and the user stops prompting after manually confirming the prompt; after the mobile terminal is connected with a vehicle central control system, battery data obtained by monitoring the vehicle is sent at random intervals, and the data is sent to a server terminal; after receiving the battery data sent by the mobile terminal, the server terminal compares the battery data with the data obtained by the charging pile and analyzes the data, and the battery health state data is obtained after the data is integrated; the charging pile stops charging after the vehicle finishes charging, and sends a charging completion signal to the server side, and the server side sends a charging completion notification to the mobile side after receiving the signal; the charging completion notification is sent once immediately after charging is completed, and then is sent once every 8 hours, and is sent once every 2 hours after 24 hours; after the charging fee is calculated by the charging module, the server side calculates the overtime fee according to different time after the vehicle which does not leave for more than 24 hours and records the overtime fee into the next charging fee; the charging completion notification can be selected to confirm after receiving the primary prompt, and the charging completion notification is forcibly prompted once every 24 hours, so that the notification sending frequency is greatly reduced.

3. The power management system of claim 1, wherein: after the vehicle starts to be charged, the server side carries out prediction analysis through an analysis module according to the historical charging data of the vehicle to obtain the predicted charging time; the server side comprehensively analyzes the vehicles which are being charged by the charging piles in the same area, divides the charging time of the vehicles, enables the vehicles to be intermittently charged, and reduces the number of the vehicles which are charged at the same time in the area; the server predicts the time interval between charging of the vehicle and the time interval of the vehicle staying after charging is finished through the analysis module, and plans longer total charging time and more charging interval time for the vehicle with longer staying time interval; the charging scheme planned by the server side has two schemes of longer time and shorter time; in the scheme with short charging time, the charging pile continuously charges the vehicle until the vehicle is fully charged; in the scheme of longer charging time, the electric quantity of the battery is quickly and continuously charged to 50% of the rated capacity when the charging pile starts, and then intermittent charging is adopted to relatively prolong the charging time; after the server terminal finishes planning, the predicted charging completion time is sent to the mobile terminal, and a user can select a charging scheme with longer or shorter predicted charging time according to own will; the charging scheme with the expected longer charging time has relatively lower charging amount to be paid; and the server side defaults to execute a charging scheme with longer pre-selected charging time.

4. The power management system of claim 1, wherein: an infrared detector is arranged in the charging pile and used for detecting whether a vehicle exists in front of the charging pile or not; a protective cover (2) is arranged on the end face of the shell (1); a conductive needle (3) is arranged in the protective cover (2); the conductive needle (3) is inserted into a corresponding jack in a vehicle charging port and communicated with a charging circuit; a mounting groove III (13) and a mounting groove I (11) are formed in the shell (1); the first mounting groove (11) is radially distributed in the shell (1), and an opening of the first mounting groove (11) is positioned on the side surface of the shell (1); the mounting grooves III (13) are distributed in the shell (1) along the axial direction; the mounting groove I (11) is communicated with the mounting groove III (13); an electromagnet (4) is arranged in the mounting groove III (13); the electromagnet (4) is a one-way holding electromagnet; an extension rod (41) of the electromagnet (4) is provided with a first conducting ring (42) and a second conducting ring (43); the distance between the first conducting ring (42) and the electromagnet (4) is smaller than the distance between the second conducting ring (43) and the electromagnet (4); a metal sleeve (44) is arranged in the mounting groove III (13); the metal sleeve (44) can be in contact with a first conductive ring (42) and a second conductive ring (43); when the electromagnet (4) is not opened, the first conducting ring (42) is in contact with the metal sleeve (44), and the second conducting ring (43) is not in contact with the metal sleeve (44); the first conducting ring (42) and the second conducting ring (43) are both electrically connected with a control module in the charging pile; a locking block (5) is arranged in the first mounting groove (11); one end, close to the surface of the shell (1), of the locking block (5) is arc-shaped, and the arc surface faces the tail end of the shell (1); an inclined surface is arranged at one end, close to the center of the shell (1), of the locking block (5); the inclined surface is contacted with the top end of the extension rod (41); the locking block (5) and the extension rod (41) are both magnetic and mutually attracted.

5. The power management system of claim 1, wherein: a second mounting groove (12) is formed in the shell (1); the second mounting groove (12) is distributed along the axial direction of the shell (1); the outlet of the second mounting groove (12) is positioned on the inner side of the protective cover (2); a telescopic rod (6) is arranged in the second mounting groove (12); a spring (63) is arranged in the second mounting groove (12); the spring (63) is positioned between the telescopic rod (6) and the bottom of the second mounting groove (12); the telescopic rod (6) extends out of the second mounting groove (12) in a normal state; the telescopic rod (6) is not in contact with the conductive needle (3); an upper contact (61) is arranged at one end, located on the second mounting groove (12), of the telescopic rod (6); a lower contact (62) is arranged at the bottom of the second mounting groove (12); the upper contact (61) and the lower contact (62) correspond to each other and are in contact with each other; the upper contact (61) and the lower contact (62) are electrically connected with the control module; a coil (64) is arranged in the shell (1); the second mounting groove (12) is positioned inside the coil (64); the coil (64) is electrically connected with the control module; the telescopic rod (6) is made of magnetic materials.