CN112491899A - Charging pile edge computing system and method based on block chain technology - Google Patents

Charging pile edge computing system and method based on block chain technology Download PDF

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CN112491899A
CN112491899A CN202011374288.0A CN202011374288A CN112491899A CN 112491899 A CN112491899 A CN 112491899A CN 202011374288 A CN202011374288 A CN 202011374288A CN 112491899 A CN112491899 A CN 112491899A
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key
management module
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郭濮瑞
屠文慧
陈小泉
蒋宜春
钱超
蔡滨宇
李红
赵笑尘
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Shanghai Wanxiang Blockchain Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F15/00—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity
    • G07F15/003—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity for electricity
    • G07F15/005—Coin-freed apparatus with meter-controlled dispensing of liquid, gas or electricity for electricity dispensed for the electrical charging of vehicles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/12—Applying verification of the received information
    • H04L63/123—Applying verification of the received information received data contents, e.g. message integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/50—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using hash chains, e.g. blockchains or hash trees
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/12—Electric charging stations

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Abstract

The invention provides a charging pile edge computing system and method based on a block chain technology, which comprises the following steps: the identity authentication module generates a block chain digital DID (digital information identification) of displacement by using an asymmetric encryption algorithm in combination with related information of a new energy vehicle or a charging device, and performs strong identity binding with a citizen digital identity EID, so that a digital identity authentication system of the human-vehicle pile is constructed; the service life evaluation module stitches the split charging data by using a block chain technology to obtain complete charging data of the pure electric vehicle, builds a battery service life model by using the completed charging data, and evaluates the attenuation of the battery to form a service life evaluation image of the battery; the charge settlement module realizes dynamic charge service charge distribution by using a block chain intelligent contract mode according to different network effects of different platforms.

Description

Charging pile edge computing system and method based on block chain technology
Technical Field
The invention relates to the technical field of block chains, in particular to a charging pile edge computing system and method based on a block chain technology.
Background
With the development of traffic electrification, the number of electric automobiles is rapidly increasing. The access of a large number of charging loads will have a great influence on the distribution network. The development of the electric power market makes the ordered scheduling of charging power of charging stations by a marketization mechanism a viable solution. And under the electric power market environment, the electric automobile, the charging station/pile and the power grid belong to different benefit main bodies, the electric automobile needs to meet the trip requirements of users, the charging station/pile is used as an operation main body of a charging service provider to pursue the maximization of own benefits, and the power grid needs to guarantee safe, economical and efficient operation. The key point of scheduling the electric automobile to participate in the power grid auxiliary service is to formulate reasonable charging and discharging electricity price and incentive measures according to the change of schedulable potential brought by different response results of users. Therefore, an incentive method can be provided for improving the willingness of the electric automobile to participate in power grid interaction by researching a charging and discharging market mechanism and charging and discharging electricity price measures of the electric automobile. However, because the charging station is different from the benefit agent of the distribution network operator, the electric energy transaction mode taking the distribution network operator as the center has the problems of unfair market status, large centralized scheduling calculation amount, low user response degree and the like. With the development of the block chain technology, a decentralized trading mode based on the technology is expected to solve the problem of multi-subject electric energy trading.
At present, research on electric vehicle charging electric energy trading interaction mainly focuses on ordered charging behavior under a vehicle-grid interaction mode which takes a power grid as a leading factor, and multi-level vehicle-pile-grid interaction under a market equal main trading mode is not considered. With the development of the energy internet and the support of the block chain technology in the future, the electric energy trading market is no longer a centralized trading environment dominated by the power grid, and the existing power price making strategy is changed. In addition, in the process of actually guiding the electric vehicle user, what directly influences the charge and discharge willingness of the electric vehicle user is the service electricity price of the charging station, so the charging station must consider the marginal electricity price of the power grid and the response degree of the user, take the influence of the traffic condition into account, and make reasonable charging station service cost.
Patent document CN111091224A (application number: 201911045464.3) discloses an electric vehicle charging electric energy trading method based on a blockchain technology, which includes designing an electric vehicle charging electric energy trading market interaction mode and a decentralized trading platform based on a blockchain storage technology; the power distribution network establishes an optimal power flow model and a blocking management model according to historical load data of the charging station, and the marginal electricity price of the power distribution network node is obtained through calculation; the charging station establishes an ordered charging scheduling model, makes a day-ahead electric energy plan according to the marginal price of the node of the power distribution network, and achieves a day-ahead electricity purchasing intelligent contract with the power distribution network through a decentralized trading platform; the charging station individually customizes charging cost for the electric vehicle user according to the real-time charging requirement of the electric vehicle user, and guides the electric vehicle user to charge in order through a charging recommendation strategy; the electric automobile user signs an intelligent contract of the charging service with the charging station through the decentralized transaction platform.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a charging pile edge computing system and method based on a block chain technology.
The invention provides a charging pile edge computing system based on a block chain technology, which comprises: the system comprises an identity authentication module, a life evaluation module, a fee settlement module and a secret key management module;
the identity authentication module generates a block chain digital DID (digital information identification) of displacement by using an asymmetric encryption algorithm and combining with related information of a new energy vehicle or a charging device, and performs strong identity binding with a citizen digital identity EID, so that a digital identity authentication system of the man-vehicle pile is constructed;
the service life evaluation module stitches the split charging data by using a block chain technology to obtain complete charging data of the pure electric vehicle, builds a battery service life model by using the completed charging data, and estimates the attenuation of the battery to form a service life evaluation image of the battery;
the charge settlement module realizes dynamic charge service charge distribution by using a block chain intelligent contract mode according to different network effects of different platforms;
the key management module distributes a unique public and private key as an identity ID of the equipment by using an HDWallet technology for each piece of Internet of things equipment, and the key management module has no replication property, and the authentication center performs reverse verification on the identity information of the equipment by using the same HDWallet technology, so that the equipment is effectively prevented from being cloned or forged.
Preferably, the life evaluation module includes:
life evaluation module M1: building a charging union network on the charging pile side according to edge computing equipment with a block chain technology;
life evaluation module M2: acquiring single charging data of the electric vehicle from the charging pile side through a CAN or Ether communication protocol;
life evaluation module M3: screening the acquired single charging data;
life evaluation module M4: repeatedly calling the life evaluation module M2 and the life evaluation module M3 until the charging data of all charging piles of the electric vehicle in the charging alliance network are obtained;
life evaluation module M5: stitching all the charging data of the electric vehicle;
life evaluation module M6: building a battery life evaluation model;
life evaluation module M7: and importing the stitched charging data into a battery life evaluation model for evaluation to obtain the SOH of the battery at the current moment.
Preferably, the life evaluation module M3 includes: extracting parameters for battery life evaluation from the acquired charging data, packaging the extracted parameters in a preset data structure, storing the parameters in a server of a charging operation platform, performing abstract extraction through an MD5 or SHA algorithm, and uploading the parameters to a block chain service platform after signing by using a private key of a charging pile; the charging operation platforms of different charging piles have different servers;
the life evaluation module M5 includes:
life evaluation module M5.1: the method comprises the steps that charging data query downloading authorization is requested to a block chain service platform through an electric vehicle block chain DID at a charging pile side, the block chain service platform queries and matches whether the charging pile has data query downloading permission or not in a DID pool according to the block chain DID of the charging pile, and if not, the request is rejected;
life evaluation module M5.2: the block chain service platform authorizes the request with the download authority and sends the authorization to servers of all charging operation platforms in the charging alliance network;
life evaluation module M5.3: the servers of all charging operation platforms in the alliance retrieve whether the charging data blocks of the electric vehicle block chain DID exist in the server according to the authorization, if yes, the charging data blocks are published to a preset theme through an MQTT transmission protocol, and only the authorized charging pile can subscribe;
life evaluation module M5.4: the authorized charging pile acquires all charging data of the electric vehicle in each charging node in the charging alliance network in a subscription mode, and calculates the hash value of each downloaded data block respectively;
life evaluation module M5.5: verifying the hash value and the hash value uploaded to the blockchain service platform firstly, confirming the integrity of data, if the data is incomplete, the issuing party re-issues the charging data to a preset theme, and the subscribing party re-downloads the database to calculate the hash value;
life evaluation module M5.6: after the charging pile acquires complete charging data, arranging the data blocks in a time sequence according to the sequence of the timestamps to acquire parameter information required by a battery life evaluation model;
the life evaluation module M6 includes:
life evaluation module M6.1: calculating the fitting slope of the voltage and current values in the preset time period by using a machine learning algorithm, wherein the slope is the current internal resistance value of the battery, and the formula is as follows:
R＝(SUM_VI-SUM_V*SUM_I/Sample_num)/(SUM_II-SUM_I*SUM_I/Sample_num)
wherein SUM _ VI represents the product of voltage and current; SUM _ V denotes a voltage SUM; SUM _ II represents the current SUM of squares; SUM _ I represents the SUM of currents; sample _ num represents the number of samples;
life evaluation module M6.2: calculating a first limit power according to the current internal resistance value of the battery;
life evaluation module M6.3: calculating a second limit power according to the internal resistance of the factory battery cell;
life evaluation module M6.4: and defining the ratio formed by the first limit power and the second limit power as the current battery health state SOH.
Preferably, the fee settlement module includes:
the block chain identity authentication and registration module: respectively creating unique block chain DIDs for charging piles and new energy vehicles of different charging platforms by using the Internet of things equipment with the block chain backup capability to obtain the charging pile DID of each charging pile and the new energy vehicle DID of each new energy vehicle;
a wallet creation management module: creating an exclusive wallet for each charging pile DID and each new energy vehicle DID, wherein the charging platform is used as a node in a charging network to own a node wallet;
a charging and billing module: charging and billing processing is carried out according to the electric charge spent by the user in single charging and the charging service charge, and the charging charge is uploaded to a block chain service platform;
a charging fee conditioning module: according to the network effect among the charging platforms, the distribution proportion of the charging service fee is dynamically calculated and used for settlement of the fee among the platforms;
the charging fee settlement module: and (4) the intelligent contract technology is adopted to settle the expenses among the platforms regularly.
Preferably, the charging billing module includes:
charging billing module M1: determining whether the charging APP and the charging pile belong to the same charging platform, and recording a flag as 0 if the charging APP and the charging pile belong to the same charging platform, otherwise, recording a flag as 1;
charging billing module M2: generating charging integration converted from 1:1 according to charging cost, wherein the charging integration Tc comprises an electric charge integration Te and a service charge integration Ts, and Tc is Te + Ts;
charging billing module M3: storing the charging credits to corresponding charging pile wallets, and recording ownership information of the charging credits;
the ownership information of the charging integral comprises address information for recording that the charging integral needs to be transferred to a node wallet of a platform to which the corresponding charging pile belongs;
the distribution proportion in the charging fee adjusting and separating module comprises:
π＝func(n_a,n_b,p,c_a,c_b)；(1)
wherein, p is position information when charging occurs; n _ a is the number of charging piles which charge the APP affiliated to the platform within the range of preset position radius value 1 when charging occurs, n _ b is the number of charging piles which charge the APP affiliated to the platform within the range of preset position radius value 2 when charging occurs, c _ a is the number of active users which charge the APP affiliated to the platform within the range of preset position radius value 1 when charging occurs, and c _ b is the number of active users which charge the APP affiliated to the platform within the range of preset position radius value 2 when charging occurs; func () represents the distribution proportion of charging service fees calculated by the number of charging piles of the two charging platforms in the preset radius range and the number of active users;
the charging fee settlement module includes:
the charging fee settlement module M1: the node wallet of the platform A periodically sends a charging point extracting instruction to a charging pile wallet under the node wallet of the platform A;
the charging fee settlement module M2: a charging pile wallet under the platform A sends charging points generated by providing charging service within a preset time range to a node wallet address corresponding to the platform A;
the charging fee settlement module M3: the intelligent contract in the platform A node wallet calculates the charging integral to be transferred according to the distribution proportion, and the specific calculation formula is as follows:
Figure BDA0002807767080000051
wherein n represents the number of times of generating effective charging in one settlement period, and effective means that electricity charges and charging service charges are actually generated; ts represents a service charge integral; te represents an electric charge integral; pi represents the distribution ratio; i represents the ith charge;
the charging fee settlement module M4: and the platform A and other platforms respectively utilize the intelligent contract to carry out one-to-one corresponding transfer on the generated charging integrals needing to be transferred and carry out corresponding expense settlement.
Preferably, the key management module includes:
the key management module M1: injecting an equipment key provided by the authentication center into the equipment by using burning software according to the manufacturing parameter information of the equipment of the Internet of things;
the key management module M2: acquiring authentication center result information according to the authentication center control information;
the key management module M3: acquiring key burning result information according to the key burning control information;
the key management module M4: acquiring the adjustment result information of the key box according to the adjustment control information of the key box;
the key management module M5: acquiring the result information of the equipment of the Internet of things according to the parameter control information of the equipment of the Internet of things;
the key management module M6: acquiring data application center setting result information according to the data application center setting information;
the key management module M7: and acquiring the key distribution and identity authentication management result information of the Internet of things equipment based on the block chain technology.
Preferably, the key management module M1 includes:
the key management module M1.1, the provided material mnemonic word parameter information applies for registration to the authentication center;
the key management module M1.2 is used for providing the device model X and applying for the X-type device key from the authentication center;
the key management module M1.3 is used for providing the X-type equipment production batch number Y for the key box;
the key management module M1.4 is used for injecting the equipment key provided by the authentication center into the equipment by using burning software;
the key management module M2 includes:
the key management module M2.1 generates a master key M and a master key D0 level chain code C according to the material mnemonic word information provided by the equipment provider;
the key management module M2.2 generates a D1 level expanded key according to the equipment model X, the master key M and the D0 level chain code C provided by the equipment manufacturer;
the secret key management module M2.3 is used for injecting the D1-level chain code C1 into secret key burning software of the equipment;
the key management module M2.4 is used for injecting the D1-level key M/X into the key box;
the key management module M2.5 is used for receiving a device public key PK1, a device ID Z and a batch number Y from the data application center;
the secret key management module M2.6 calculates a device public key PK2 by using the D1 level expanded secret key, the batch number Y and the device ID Z;
the key management module M2.7 compares PK1 and PK2 and returns the comparison result to the data application center;
the key management module M2.8 generates: d0 level master key m, D0 level chain code C, D1 level key m/X, D1 level chain code C1;
and the key management module M2.9 is used for storing: master key m at level D0, chain code C at level D0.
Preferably, the key management module M3 includes:
the key management module M3.1 provides the D1 level chain code C1 to the key box;
a key management module M3.2, receiving a D2 level expanded key from a key box;
a key management module M3.3 for receiving a device ID Z from the device;
the secret key management module M3.4 generates a D3-level expanded secret key by using the D2-level expanded secret key and taking the equipment ID Z as an index;
the secret key management module M3.5 is used for safely transmitting the D3 level expanded secret key to the device Z;
the key management module M3.6 discards the D2-level expanded key;
the key management module M3.7 generates: d3 level private key m/X/Y/Z, D3 level chain code C3;
and the key management module M3.8 is used for storing: level D1 chain code C1.
The key management module M4 includes:
the key management module M4.1 is used for receiving the D1-level chain code C1 from the key burning software;
the key management module M4.2 is used for receiving the production batch number Y from the X-type equipment;
the key management module M4.3 generates a D2-level expanded key by utilizing the D1-level chain code C1, the equipment batch number Y and a D1-level private key M/X stored in the key management module;
the secret key management module M4.4 is used for safely transmitting the D2-level expanded secret key to the burning software;
the key management module M4.5 generates: d2 level private key m/X/Y, D2 level chain code C2;
and the key management module M4.6 is used for storing: d1 level private key m/X;
preferably, the key management module M5 includes:
the secret key management module M5.1 is used for providing the equipment ID Z for the secret key burning software;
the key management module M5.2 is used for receiving the D3-level expanded key from the key burning software;
the key management module M5.3 utilizes the built-in mnemonic words and the equipment ID Z of the equipment to generate a key index I by using a BIP39 mechanism;
the secret key management module M5.4 generates a D4 level expanded secret key by utilizing the D3 level expanded secret key and the index I;
the key management module M5.5 discards the D3-level expanded key;
the key management module M5.6 is used for signing the data by using a D4-level private key M/X/Y/Z/I and sending the data to the data application center;
key management module M5.7 generating and storing: d4 level private key m/X/Y/Z/I, D4 level chain code C4;
the key management module M6 includes:
the key management module M6.1 receives the device ID Z, the batch number Y and the application data from the device;
the key management module M6.1 recovers the device public key PK1 from the application data;
the key management module M6.1 sends the equipment public key PK1, the equipment ID Z and the batch number Y to an authentication center so as to verify the equipment identity;
the key management module M6.1 receives the authentication result of the authentication center.
The invention provides a charging pile edge calculation method based on a block chain technology, which comprises the following steps: an identity authentication step, a life evaluation step, a cost settlement step and a secret key management step;
the identity authentication step utilizes an asymmetric encryption algorithm and combines related information of a new energy vehicle or a charging device to generate a block chain digital DID (digital information identification) of displacement, and the block chain digital DID is strongly bound with a citizen digital identity EID, so that a digital identity authentication system of the man-vehicle pile is constructed;
in the service life evaluation step, the cracked charging data is stitched by using a block chain technology to obtain complete charging data of the pure electric vehicle, a battery service life model is built by using the completed charging data, and the attenuation of the battery is estimated to form a service life evaluation image of the battery;
the charge settlement step realizes dynamic charge service charge distribution by using a block chain intelligent contract mode according to different network effects of different platforms;
the key management step uses the HDWallet technology to distribute a unique public and private key for each piece of Internet of things equipment, the private key serves as the identity ID of the equipment, the equipment does not have the copying property, and the authentication center uses the same HDWallet technology to reversely verify the identity information of the equipment, so that the equipment is effectively prevented from being cloned or forged.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention provides block chain-based Internet of things equipment with edge computing capability and a method thereof in an application scene of a charging pile by using related technologies such as block chains;
2. according to the invention, DID identity creation of new energy vehicles and charging piles in the whole charging network can be realized through the equipment, and a series of functions such as equipment sharing, point-to-point payment and the like are provided on the basis;
3. according to the invention, block chain technology (HDWallet, block chain signature, encryption and the like) is adopted, so that the problems of identity authentication, data right confirmation, privacy protection and the like of the equipment of the Internet of things are solved;
4. the invention uses the HDWalle technology to distribute a unique public and private key for each Internet of things device, the private key is used as the identity ID of the device, the identity ID is not reproducible, the authentication center uses the same HDWalle technology to reversely verify the identity information of the device, and the cloning or counterfeiting of the device is effectively prevented;
5. according to the invention, by using the related technology in the block chain, the data acquired by the equipment is subjected to block chain signature, encryption and other packaging processing, so that data can not be tampered and data privacy protection is really realized.
6. The invention creatively solves the difficult problems of the charge data at the charge pile side being split and fragmented by utilizing the characteristic of the block chain distributed storage, thereby providing a scheme for estimating the service life of the battery at the charge pile side.
7. The invention creatively solves the problem of difficult expense settlement caused by different network effects among a plurality of platforms by utilizing the technical characteristics of the block chain, and solves the problem of sharing of private charging equipment.
8. The contribution degree of each platform in the charging network is different, the cost settlement friction cost among the platforms is high due to different user scales, different user viscosities and different network effects.
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Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of a charging pile edge computing system based on a blockchain technology.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
The existing charging pile is relatively single in function, only supports charging and does not have edge computing capacity based on a block chain. The equipment and the method provide a secret key distribution and identity authentication management method for the charging pile and the new energy vehicle, and a digital identity authentication system of the human-vehicle pile is constructed; providing a method for evaluating the service life of a new energy automobile power battery on a charging pile side, and constructing a service life estimation model of the new energy automobile power battery; a solution is provided for the difficult problem of expense settlement between different charging platforms, so that data interfaces of different charging operators are opened, and interconnection and intercommunication are realized.
As shown in fig. 1, the data acquisition module acquires charging data; the bus module is responsible for data transmission between the equipment and the charging pile control module; the wireless module is responsible for uploading processed data in the cloud; the identity authentication management unit creates a unique DID and a unique wallet account for the charging pile and the new energy vehicle; the key management unit manages public key information of the charging vehicles stored on the charging pile at the edge side; the charge settlement unit realizes direct transaction settlement of the vehicle account, the charging pile account and the vehicle account; and the SOH calculating unit is used for stitching fragmented charging data of a certain new energy vehicle in the whole charging network, and the residual battery life data processing unit is used for cleaning the calculable data through an artificial intelligence algorithm.
The invention provides a charging pile edge computing system based on a block chain technology, which comprises: the system comprises an identity authentication module, a life evaluation module, a fee settlement module and a secret key management module;
the identity authentication module generates a block chain digital DID (digital information identification) of displacement by using an asymmetric encryption algorithm and combining with related information of a new energy vehicle or a charging device, and performs strong identity binding with a citizen digital identity EID, so that a digital identity authentication system of the man-vehicle pile is constructed;
the service life evaluation module stitches the split charging data by using a block chain technology to obtain complete charging data of the pure electric vehicle, builds a battery service life model by using the completed charging data, and estimates the attenuation of the battery to form a service life evaluation image of the battery;
the charge settlement module realizes dynamic charge service charge distribution by using a block chain intelligent contract mode according to different network effects of different platforms;
the key management module distributes a unique public and private key as an identity ID of the equipment by using an HDWallet technology for each piece of Internet of things equipment, and the key management module has no replication property, and the authentication center performs reverse verification on the identity information of the equipment by using the same HDWallet technology, so that the equipment is effectively prevented from being cloned or forged.
Specifically, the life evaluation module includes:
life evaluation module M1: building a charging union network on the charging pile side according to edge computing equipment with a block chain technology;
life evaluation module M2: acquiring single charging data of the electric vehicle from the charging pile side through a CAN or Ether communication protocol;
life evaluation module M3: screening the acquired single charging data;
life evaluation module M4: repeatedly calling the life evaluation module M2 and the life evaluation module M3 until the charging data of all charging piles of the electric vehicle in the charging alliance network are obtained;
life evaluation module M5: stitching all the charging data of the electric vehicle;
life evaluation module M6: building a battery life evaluation model;
life evaluation module M7: and importing the stitched charging data into a battery life evaluation model for evaluation to obtain the SOH of the battery at the current moment.
Specifically, the life evaluation module M3 includes: extracting parameters for battery life evaluation from the acquired charging data, packaging the extracted parameters in a preset data structure, storing the parameters in a server of a charging operation platform, performing abstract extraction through an MD5 or SHA algorithm, and uploading the parameters to a block chain service platform after signing by using a private key of a charging pile; the charging operation platforms of different charging piles have different servers;
the life evaluation module M5 includes:
life evaluation module M5.1: the method comprises the steps that charging data query downloading authorization is requested to a block chain service platform through an electric vehicle block chain DID at a charging pile side, the block chain service platform queries and matches whether the charging pile has data query downloading permission or not in a DID pool according to the block chain DID of the charging pile, and if not, the request is rejected;
life evaluation module M5.2: the block chain service platform authorizes the request with the download authority and sends the authorization to servers of all charging operation platforms in the charging alliance network;
life evaluation module M5.3: the servers of all charging operation platforms in the alliance retrieve whether the charging data blocks of the electric vehicle block chain DID exist in the server according to the authorization, if yes, the charging data blocks are published to a preset theme through an MQTT transmission protocol, and only the authorized charging pile can subscribe;
life evaluation module M5.4: the authorized charging pile acquires all charging data of the electric vehicle in each charging node in the charging alliance network in a subscription mode, and calculates the hash value of each downloaded data block respectively;
life evaluation module M5.5: verifying the hash value and the hash value uploaded to the blockchain service platform firstly, confirming the integrity of data, if the data is incomplete, the issuing party re-issues the charging data to a preset theme, and the subscribing party re-downloads the database to calculate the hash value;
life evaluation module M5.6: after the charging pile acquires complete charging data, arranging the data blocks in a time sequence according to the sequence of the timestamps to acquire parameter information required by a battery life evaluation model;
the life evaluation module M6 includes:
life evaluation module M6.1: calculating the fitting slope of the voltage and current values in the preset time period by using a machine learning algorithm, wherein the slope is the current internal resistance value of the battery, and the formula is as follows:
R＝(SUM_VI-SUM_V*SUM_I/Sample_num)/(SUM_II-SUM_I*SUM_I/Sample_num)
wherein SUM _ VI represents the product of voltage and current; SUM _ V denotes a voltage SUM; SUM _ II represents the current SUM of squares; SUM _ I represents the SUM of currents; sample _ num represents the number of samples;
life evaluation module M6.2: calculating a first limit power according to the current internal resistance value of the battery;
life evaluation module M6.3: calculating a second limit power according to the internal resistance of the factory battery cell;
life evaluation module M6.4: and defining the ratio formed by the first limit power and the second limit power as the current battery health state SOH.
Specifically, the fee settlement module includes:
the block chain identity authentication and registration module: respectively creating unique block chain DIDs for charging piles and new energy vehicles of different charging platforms by using the Internet of things equipment with the block chain backup capability to obtain the charging pile DID of each charging pile and the new energy vehicle DID of each new energy vehicle;
a wallet creation management module: creating an exclusive wallet for each charging pile DID and each new energy vehicle DID, wherein the charging platform is used as a node in a charging network to own a node wallet;
a charging and billing module: charging and billing processing is carried out according to the electric charge spent by the user in single charging and the charging service charge, and the charging charge is uploaded to a block chain service platform;
a charging fee conditioning module: according to the network effect among the charging platforms, the distribution proportion of the charging service fee is dynamically calculated and used for settlement of the fee among the platforms;
the charging fee settlement module: and (4) the intelligent contract technology is adopted to settle the expenses among the platforms regularly.
Specifically, the charging and billing module includes:
charging billing module M1: determining whether the charging APP and the charging pile belong to the same charging platform, and recording a flag as 0 if the charging APP and the charging pile belong to the same charging platform, otherwise, recording a flag as 1;
charging billing module M2: generating charging integration converted from 1:1 according to charging cost, wherein the charging integration Tc comprises an electric charge integration Te and a service charge integration Ts, and Tc is Te + Ts;
charging billing module M3: storing the charging credits to corresponding charging pile wallets, and recording ownership information of the charging credits;
the ownership information of the charging integral comprises address information for recording that the charging integral needs to be transferred to a node wallet of a platform to which the corresponding charging pile belongs;
the distribution proportion in the charging fee adjusting and separating module comprises:
π＝func(n_a,n_b,p,c_a,c_b)； (1)
wherein, p is position information when charging occurs; n _ a is the number of charging piles which charge the APP affiliated to the platform within the range of preset position radius value 1 when charging occurs, n _ b is the number of charging piles which charge the APP affiliated to the platform within the range of preset position radius value 2 when charging occurs, c _ a is the number of active users which charge the APP affiliated to the platform within the range of preset position radius value 1 when charging occurs, and c _ b is the number of active users which charge the APP affiliated to the platform within the range of preset position radius value 2 when charging occurs; func () represents the distribution proportion of charging service fees calculated by the number of charging piles of the two charging platforms in the preset radius range and the number of active users;
the charging fee settlement module includes:
the charging fee settlement module M1: the node wallet of the platform A periodically sends a charging point extracting instruction to a charging pile wallet under the node wallet of the platform A;
the charging fee settlement module M2: a charging pile wallet under the platform A sends charging points generated by providing charging service within a preset time range to a node wallet address corresponding to the platform A;
the charging fee settlement module M3: the intelligent contract in the platform A node wallet calculates the charging integral to be transferred according to the distribution proportion, and the specific calculation formula is as follows:
Figure BDA0002807767080000121
wherein n represents the number of times of generating effective charging in one settlement period, and effective means that electricity charges and charging service charges are actually generated; ts represents a service charge integral; te represents an electric charge integral; pi represents the distribution ratio; i represents the ith charge;
the charging fee settlement module M4: and the platform A and other platforms respectively utilize the intelligent contract to carry out one-to-one corresponding transfer on the generated charging integrals needing to be transferred and carry out corresponding expense settlement.
Specifically, the key management module includes:
the key management module M1: injecting an equipment key provided by the authentication center into the equipment by using burning software according to the manufacturing parameter information of the equipment of the Internet of things;
the key management module M2: acquiring authentication center result information according to the authentication center control information;
the key management module M3: acquiring key burning result information according to the key burning control information;
the key management module M4: acquiring the adjustment result information of the key box according to the adjustment control information of the key box;
the key management module M5: acquiring the result information of the equipment of the Internet of things according to the parameter control information of the equipment of the Internet of things;
the key management module M6: acquiring data application center setting result information according to the data application center setting information;
the key management module M7: and acquiring the key distribution and identity authentication management result information of the Internet of things equipment based on the block chain technology.
Specifically, the key management module M1 includes:
the key management module M1.1, the provided material mnemonic word parameter information applies for registration to the authentication center;
the key management module M1.2 is used for providing the device model X and applying for the X-type device key from the authentication center;
the key management module M1.3 is used for providing the X-type equipment production batch number Y for the key box;
the key management module M1.4 is used for injecting the equipment key provided by the authentication center into the equipment by using burning software;
the key management module M2 includes:
the key management module M2.1 generates a master key M and a master key D0 level chain code C according to the material mnemonic word information provided by the equipment provider;
the key management module M2.2 generates a D1 level expanded key according to the equipment model X, the master key M and the D0 level chain code C provided by the equipment manufacturer;
the secret key management module M2.3 is used for injecting the D1-level chain code C1 into secret key burning software of the equipment;
the key management module M2.4 is used for injecting the D1-level key M/X into the key box;
the key management module M2.5 is used for receiving a device public key PK1, a device ID Z and a batch number Y from the data application center;
the secret key management module M2.6 calculates a device public key PK2 by using the D1 level expanded secret key, the batch number Y and the device ID Z;
the key management module M2.7 compares PK1 and PK2 and returns the comparison result to the data application center;
the key management module M2.8 generates: d0 level master key m, D0 level chain code C, D1 level key m/X, D1 level chain code C1;
and the key management module M2.9 is used for storing: master key m at level D0, chain code C at level D0.
Specifically, the key management module M3 includes:
the key management module M3.1 provides the D1 level chain code C1 to the key box;
a key management module M3.2, receiving a D2 level expanded key from a key box;
a key management module M3.3 for receiving a device ID Z from the device;
the secret key management module M3.4 generates a D3-level expanded secret key by using the D2-level expanded secret key and taking the equipment ID Z as an index;
the secret key management module M3.5 is used for safely transmitting the D3 level expanded secret key to the device Z;
the key management module M3.6 discards the D2-level expanded key;
the key management module M3.7 generates: d3 level private key m/X/Y/Z, D3 level chain code C3;
and the key management module M3.8 is used for storing: level D1 chain code C1.
The key management module M4 includes:
the key management module M4.1 is used for receiving the D1-level chain code C1 from the key burning software;
the key management module M4.2 is used for receiving the production batch number Y from the X-type equipment;
the key management module M4.3 generates a D2-level expanded key by utilizing the D1-level chain code C1, the equipment batch number Y and a D1-level private key M/X stored in the key management module;
the secret key management module M4.4 is used for safely transmitting the D2-level expanded secret key to the burning software;
the key management module M4.5 generates: d2 level private key m/X/Y, D2 level chain code C2;
and the key management module M4.6 is used for storing: d1 level private key m/X;
specifically, the key management module M5 includes:
the secret key management module M5.1 is used for providing the equipment ID Z for the secret key burning software;
the key management module M5.2 is used for receiving the D3-level expanded key from the key burning software;
the key management module M5.3 utilizes the built-in mnemonic words and the equipment ID Z of the equipment to generate a key index I by using a BIP39 mechanism;
the secret key management module M5.4 generates a D4 level expanded secret key by utilizing the D3 level expanded secret key and the index I;
the key management module M5.5 discards the D3-level expanded key;
the key management module M5.6 is used for signing the data by using a D4-level private key M/X/Y/Z/I and sending the data to the data application center;
key management module M5.7 generating and storing: d4 level private key m/X/Y/Z/I, D4 level chain code C4;
the key management module M6 includes:
the key management module M6.1 receives the device ID Z, the batch number Y and the application data from the device;
the key management module M6.1 recovers the device public key PK1 from the application data;
the key management module M6.1 sends the equipment public key PK1, the equipment ID Z and the batch number Y to an authentication center so as to verify the equipment identity;
the key management module M6.1 receives the authentication result of the authentication center.
The invention provides a charging pile edge calculation method based on a block chain technology, which comprises the following steps: an identity authentication step, a life evaluation step, a cost settlement step and a secret key management step;
the identity authentication step utilizes an asymmetric encryption algorithm and combines related information of a new energy vehicle or a charging device to generate a block chain digital DID (digital information identification) of displacement, and the block chain digital DID is strongly bound with a citizen digital identity EID, so that a digital identity authentication system of the man-vehicle pile is constructed;
in the service life evaluation step, the cracked charging data is stitched by using a block chain technology to obtain complete charging data of the pure electric vehicle, a battery service life model is built by using the completed charging data, and the attenuation of the battery is estimated to form a service life evaluation image of the battery;
the charge settlement step realizes dynamic charge service charge distribution by using a block chain intelligent contract mode according to different network effects of different platforms;
the key management step uses the HDWallet technology to distribute a unique public and private key for each piece of Internet of things equipment, the private key serves as the identity ID of the equipment, the equipment does not have the copying property, and the authentication center uses the same HDWallet technology to reversely verify the identity information of the equipment, so that the equipment is effectively prevented from being cloned or forged.
Example 2
Example 2 is a modification of example 1
According to the method, the cracked charging data are stitched by utilizing a block chain technology to obtain the complete charging data of the pure electric vehicle, a battery life model is built by utilizing the data, the attenuation of the battery is estimated, and a battery life evaluation portrait is formed.
The invention provides an electric vehicle battery life evaluation method based on a block chain and a charging device, which comprises the following steps:
step 1: integrating a blockchain capable edge computing device to the side of the charging stake;
step 2: utilize above-mentioned equipment to put up the alliance network of charging based on block chain technique, specifically include: the charging pile and the distributed data processor are linked, the distributed data processor verifies the charging pile data in real time, sends a charging message to the central data processor, verifies the charging message, judges whether the charging is in process, and runs the state history database, the real-time running state database and the charging settlement database if the charging is in process; if not, only operating the state history database and the real-time operation state database; the charging alliance network can realize interconnection and intercommunication of charging piles, and unique block chain DID is allocated to all the charging piles and new energy vehicles in the network;
and step 3: acquiring single charging data of an electric vehicle from the charging pile side by utilizing the equipment through communication protocols such as CAN (controller area network) or Ether;
and 4, step 4: screening the captured single charging data, extracting key parameters related to battery life evaluation, packaging and storing the parameters to a server of a charging operation platform (the servers of the charging operation platforms of different charging piles are different) in a special data structure, performing abstract extraction through Hash algorithms such as MD5 or SHA, signing by using a private key of the charging pile, and uploading to a block chain service platform;
and 5: repeating the step 3 and the step 4, and capturing the charging data of the electric automobile in any charging pile in the charging alliance;
step 6: stitching the data of the electric vehicle;
and 7: building a battery life evaluation model;
and 8: and importing the sewed charging data into a built battery life model for estimation to obtain the SOH value of the battery at the current moment for battery use portrait evaluation.
The step 6 comprises the following steps:
step 6.1: requesting a charging data query download authorization from a block chain service platform by using the electric vehicle block chain DID distributed in the step 2 at the charging pile side, and querying and matching whether the charging pile has a data query download permission or not in a DID pool by the block chain service platform according to the block chain DID of the charging pile, if not, rejecting the request;
step 6.2: the block chain service platform authorizes the request with the downloading authority and sends the authorization to all charging operation platform servers in the alliance;
step 6.3: all charging operation platform servers in the alliance search whether the charging data blocks of the electric vehicle block chain DID exist in the servers or not according to the authorization, if so, the related charging data blocks are completely published to a specific theme through a transmission protocol similar to MQTT, and only the authorized charging piles can subscribe;
step 6.4: the authorized charging pile acquires all charging data of the electric vehicle in each charging node in the whole charging network in a subscription mode, and calculates the hash value of each downloaded data block respectively;
step 6.5: the hash value and the hash value which is uploaded to the block chain service platform firstly are checked one by one, the integrity of data is confirmed, if the data is incomplete, the publisher publishes the data again, and the subscriber downloads the data again;
step 6.6: after the charging pile obtains complete charging data, the data blocks are arranged in a time-series mode according to the sequence of the timestamps, and parameter information needed by the battery life evaluation model is obtained.
As shown in fig. 1, the step 7 includes the following steps:
step 7.1: calculating the fitting slope of the voltage and current values in a period of time by using a machine learning algorithm, wherein the slope is approximately the current internal resistance value of the battery, and the formula is as follows:
R＝(SUM_VI-SUM_V*SUM_I/Sample_num)/(SUM_II-SUM_I*SUM_I/Sample_num)
wherein SUM _ VI: the product of the voltage and the current; SUM _ V: a sum of voltages; SUM _ II: the sum of the squares of the currents; SUM _ I: the sum of the currents; sample _ num: the number of samples;
step 7.2: calculating a first limit power by using the currently estimated internal resistance;
step 7.3: calculating a second limit power by using the internal resistance of the battery cell when leaving the factory;
step 7.4: and defining the first limit power and the second limit power to form a ratio as the current SOH.
According to the invention, the system for evaluating the battery life of the electric vehicle based on the block chain and the charging equipment comprises:
module M1: at the charging pile side, building a charging alliance network according to edge computing equipment with a block chain technology;
module M2: acquiring single charging data of the electric vehicle from the charging pile side through a CAN or Ether communication protocol;
module M3: screening the acquired single charging data;
module M4: repeatedly calling the module M2 and the module M3 until the charging data of all charging piles of the electric vehicle in the charging alliance network are obtained;
module M5: stitching all the charging data of the electric vehicle;
module M6: building a battery life evaluation model;
module M7: and importing the stitched charging data into a battery life evaluation model for evaluation to obtain the SOH of the battery at the current moment.
Example 3
Example 3 is a modification of example 1
The invention provides a charging multi-platform fee settlement system based on a block chain, which comprises:
the block chain identity authentication and registration module: respectively creating unique block chain DIDs for charging piles and new energy vehicles of different charging platforms by using the Internet of things equipment with the block chain backup capability to obtain the charging pile DID of each charging pile and the new energy vehicle DID of each new energy vehicle;
a wallet creation management module: creating an exclusive wallet for each charging pile DID and each new energy vehicle DID, wherein the charging platform is used as a node in a charging network to own a node wallet;
a charging and billing module: charging and billing are carried out according to the electric charge spent by the user in single charging and the charging service charge, so that the charging charge is real and credible, and the charging charge is uploaded to a block chain service platform;
a charging fee conditioning module: according to the network effect among the charging platforms, the distribution proportion of the charging service fee is dynamically calculated and used for settlement of the fee among the platforms;
the charging fee settlement module: and (4) the intelligent contract technology is adopted to settle the expenses among the platforms regularly.
Specifically, the charging pile DID comprises a charging platform, an equipment manufacturer, an equipment number and a production date;
the new energy vehicle DID includes OEM manufacturer, vehicle VIN code, date of manufacture, and owner information.
And the identification registration of the block chain combines vehicle information such as vehicle VIN codes and the like with EID of a public security system to realize digital twin mapping of people and vehicles.
Specifically, the node wallet is provided with the right to extract charging points in all charging pile wallets under the charging platform.
Specifically, the charging and billing module includes:
charging billing module M1: determining whether the charging APP and the charging pile belong to the same charging platform, and recording a flag as 0 if the charging APP and the charging pile belong to the same charging platform, otherwise, recording a flag as 1;
charging billing module M2: generating charging integration converted from 1:1 according to charging cost, wherein the charging integration Tc comprises an electric charge integration Te and a service charge integration Ts, and Tc is Te + Ts;
te is exchanged according to the fact that the electricity consumed by the user is 1:1
Charging service cost actually generated by Ts according to contribution coefficient of platform to charging network
Charging billing module M3: storing the charging credits to corresponding charging pile wallets, and recording ownership information of the charging credits;
the ownership information of the charging integral comprises address information for recording that the charging integral needs to be transferred to a node wallet of a platform to which the corresponding charging pile belongs.
Specifically, the distribution ratio in the charging cost separation module includes:
π＝func(n_a,n_b,p,c_a,c_b)； (1)
wherein, p is position information when charging occurs; n _ a is the number of charging piles of the charging APP affiliated platform within the range of the position radius of 3km when charging occurs, n _ b is the number of charging piles of the charging APP affiliated platform within the range of the position radius of 5km when charging occurs, c _ a is the number of user activity jumps of the charging APP affiliated platform within the range of the position radius of 3km when charging occurs, and c _ b is the number of user activity jumps of the charging APP affiliated platform within the range of the position radius of 5km when charging occurs; func () represents the distribution ratio of charging service fees calculated by the number of charging piles of the two charging platforms within a preset radius range and the number of active users.
Specifically, the charging fee settlement module includes:
the charging fee settlement module M1: the node wallet of the platform A periodically sends a charging point extracting instruction to a charging pile wallet under the node wallet of the platform A;
the charging fee settlement module M2: a charging pile wallet under the platform A sends charging points generated by providing charging service within a preset time range to a node wallet address corresponding to the platform A;
the charging fee settlement module M3: the intelligent contract in the platform A node wallet calculates the charging integral to be transferred according to the distribution proportion, and the specific calculation formula is as follows:
Figure BDA0002807767080000181
wherein n represents the number of times of generating effective charging in one settlement period, and effective means that electricity charges and charging service charges are actually generated; ts represents a service charge integral; te represents an electric charge integral; pi represents the distribution ratio; i represents the ith charge;
the charging fee settlement module M4: and the platform A and other platforms respectively utilize the intelligent contract to carry out one-to-one corresponding transfer on the generated charging integrals needing to be transferred and carry out corresponding expense settlement.
According to the charging multi-platform fee settlement method based on the block chain, as shown in fig. 1, the charging multi-platform fee settlement method comprises the following steps:
a block chain identity authentication and registration step: respectively creating unique block chain DIDs for charging piles and new energy vehicles of different charging platforms by using the Internet of things equipment with the block chain backup capability to obtain the charging pile DID of each charging pile and the new energy vehicle DID of each new energy vehicle;
wallet creation management step: creating an exclusive wallet for each charging pile DID and each new energy vehicle DID, wherein the charging platform is used as a node in a charging network to own a node wallet;
charging and charging steps: charging and billing processing is carried out according to the electric charge spent by the user in single charging and the charging service charge, and the charging charge is uploaded to a block chain service platform;
a charging cost conditioning step: according to the network effect among the charging platforms, the distribution proportion of the charging service fee is dynamically calculated and used for settlement of the fee among the platforms;
and (3) charging fee settlement step: and (4) the intelligent contract technology is adopted to settle the expenses among the platforms regularly.
Specifically, the charging pile DID includes the charging platform, the device manufacturer, the device number, and the production date;
the DID comprises an OEM manufacturer, a vehicle VIN code, a production date and owner information;
the node wallet has the authority of extracting charging points in all charging pile wallets under the charging platform;
the charging billing step comprises:
charging billing step M1: determining whether the charging APP and the charging pile belong to the same charging platform, and recording a flag as 0 if the charging APP and the charging pile belong to the same charging platform, otherwise, recording a flag as 1;
charging billing step M2: generating charging integration converted from 1:1 according to charging cost, wherein the charging integration Tc comprises an electric charge integration Te and a service charge integration Ts, and Tc is Te + Ts;
charging billing step M3: storing the charging credits to corresponding charging pile wallets, and recording ownership information of the charging credits;
the ownership information of the charging integral comprises address information for recording that the charging integral needs to be transferred to a node wallet of a platform to which the corresponding charging pile belongs.
Specifically, the distribution ratio in the charging cost adjustment and separation step includes:
π＝func(n_a,n_b,p,c_a,c_b)； (1)
wherein, p is position information when charging occurs; n _ a is the number of charging piles which charge the APP affiliated to the platform within the range of preset position radius value 1 when charging occurs, n _ b is the number of charging piles which charge the APP affiliated to the platform within the range of preset position radius value 2 when charging occurs, c _ a is the number of active users which charge the APP affiliated to the platform within the range of preset position radius value 1 when charging occurs, and c _ b is the number of active users which charge the APP affiliated to the platform within the range of preset position radius value 2 when charging occurs; func () represents the distribution proportion of charging service fees calculated by the number of charging piles of the two charging platforms in the preset radius range and the number of active users;
the charging fee settlement step includes:
charging fee settlement step M1: the node wallet of the platform A periodically sends a charging point extracting instruction to a charging pile wallet under the node wallet of the platform A;
charging fee settlement step M2: a charging pile wallet under the platform A sends charging points generated by providing charging service within a preset time range to a node wallet address corresponding to the platform A;
charging fee settlement step M3: the intelligent contract in the platform A node wallet calculates the charging integral to be transferred according to the distribution proportion, and the specific calculation formula is as follows:
Figure BDA0002807767080000201
wherein n represents the number of times of generating effective charging in one settlement period, and effective means that electricity charges and charging service charges are actually generated; ts represents a service charge integral; te represents an electric charge integral; pi represents the distribution ratio; i represents the ith charge;
charging fee settlement step M4: and the platform A and other platforms respectively utilize the intelligent contract to carry out one-to-one corresponding transfer on the generated charging integrals needing to be transferred and carry out corresponding expense settlement.
According to the equipment sharing method for charging multi-platform fee settlement based on the block chain, the charging multi-platform fee settlement system based on the block chain is used for executing the following steps:
step M1: the new energy automobile sends a charging request to the private charging pile through a wireless communication technology;
step M2: the private charging pile inquires whether a block chain DID corresponding to the current vehicle exists or not from the block chain service platform, when the corresponding block chain DID exists, charging is allowed, the vehicle generates corresponding charging points for the charge generated by charging, the charging points are transferred to a private charging pile wallet, and a mobile payment interface is called to complete charge transfer between bank accounts; when there is no corresponding blockchain DID, charging is not allowed.
Example 4
Example 4 is a modification of example 1
The internet of things equipment key distribution and identity authentication management system comprises the following roles or functional modules:
1) internet of things equipment manufacturer
A. The provided materials (mnemonics) apply for registration to the authentication center;
B. providing an equipment model X, and applying for an X-type equipment key from an authentication center;
C. providing the key box with an X-type equipment production lot number Y;
D. injecting the device key provided by the authentication center into the device by using burning software;
2) the authentication center:
generating a master key m and a master key D0 level chain code C according to materials (mnemonics) provided by a device manufacturer;
A. generating a D1 level expanded key (comprising a D1 private key m/X and a D1 level chain code C1, the same below) according to the device model X, the master key m and the D0 level chain code C provided by a device manufacturer;
B. injecting the D1-level chain code C1 into key burning software of the equipment;
C. injecting a D1 level key m/X into a key box;
D. receiving a device public key PK1, a device ID Z and a batch number Y from a data application center;
E. calculating a device public key PK2 by using the D1 level expanded key, the batch number Y and the device ID Z;
F. comparing PK1 with PK2, and returning the comparison result to the data application center;
G. generating: d0 level master key m, D0 level chain code C, D1 level key m/X, D1 level chain code C1;
H. and (3) storing: master key m at level D0, chain code C at level D0;
3) key burning software
A. Providing the key locker with a D1 level chain code C1;
B. receiving a level D2 expanded key from a key box (including a level D2 private key m/X/Y and a level D2 chain code C2, the same below);
C. receiving a device ID Z from a device;
D. generating a D3 level expanded key (including a D3 private key m/X/Y/Z and a D3 level chain code C3, the same below) by using the D2 level expanded key and using the device ID Z as an index;
E. securely transmitting the D3 level expanded key out to device Z;
F. discarding the expanded key of level D2;
G. generating: d3 level private key m/X/Y/Z, D3 level chain code C3;
H. and (3) storing: level D1 chain code C1;
4) key box
A. Receiving a D1-level chain code C1 from key burning software;
B. receiving a production lot number Y from X-type equipment;
C. generating a D2-level expanded key by using the D1-level chain code C1, the equipment batch number Y and a D1-level private key m/X stored in the equipment batch number Y;
D. the D2 level expanded key is safely transmitted to burning software;
E. generating: d2 level private key m/X/Y, D2 level chain code C2;
F. and (3) storing: d1 level private key m/X;
5) internet of things equipment
A. Providing a device ID Z to the key burning software;
B. receiving a D3-level expanded key from key burning software;
C. generating a key index I by using a built-in mnemonic word and a device ID Z of the device and using a BIP39 mechanism;
D. generating a D4-level expanded key (comprising a D4 private key m/X/Y/Z/I and a D4-level chain code C4, the same below) by using the D3-level expanded key and the index I;
E. discarding the expanded key of level D3;
F. signing the data by using a D4-level private key m/X/Y/Z/I, and sending the data to a data application center;
G. generating and storing: d4 level private key m/X/Y/Z/I, D4 level chain code C4;
6) data application center
A. Receiving a device ID Z, a batch number Y and application data from a device;
B. recovering the device public key PK1 from the application data;
C. sending the device public key PK1, the device ID Z and the batch number Y to an authentication center so as to verify the identity of the device;
D. and receiving an authentication result of the authentication center.
Those skilled in the art will appreciate that, in addition to implementing the systems, apparatus, and individual modules thereof provided by the present invention in purely computer readable program code, the same procedures can be implemented entirely by logically programming method steps into logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Therefore, the system, the device and the modules thereof provided by the present invention can be considered as a hardware component, and the modules included in the system, the device and the modules thereof for implementing various programs can also be considered as structures in the hardware component; modules for performing various functions may also be considered to be both software programs for performing the methods and structures within hardware components.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

Claims (10)

1. A charging pile edge computing system based on block chain technology is characterized by comprising: the system comprises an identity authentication module, a life evaluation module, a fee settlement module and a secret key management module;
the identity authentication module generates a block chain digital DID (digital information identification) of displacement by using an asymmetric encryption algorithm in combination with related information of a new energy vehicle or a charging device, and performs strong identity binding with a citizen digital identity EID, so that a digital identity authentication system of the human-vehicle pile is constructed;
the service life evaluation module stitches the split charging data by using a block chain technology to obtain complete charging data of the pure electric vehicle, builds a battery service life model by using the completed charging data, and estimates the attenuation of the battery to form a service life evaluation image of the battery;
the charge settlement module realizes dynamic charge service charge distribution by using a block chain intelligent contract mode according to different network effects of different platforms;
the key management module distributes a unique public and private key for each piece of Internet of things equipment by using an HDWallet technology, the unique public and private key serves as the identity ID of the equipment, the equipment does not have the copying property, and the authentication center performs reverse verification on the identity information of the equipment by using the same HDWallet technology, so that the equipment is effectively prevented from being cloned or forged.
2. The blockchain technology-based charging pile edge computing system according to claim 1, wherein the life evaluation module includes:
life evaluation module M1: at the charging pile side, building a charging alliance network according to edge computing equipment with a block chain technology;
life evaluation module M2: acquiring single charging data of the electric vehicle from the charging pile side through a CAN or Ether communication protocol;
life evaluation module M3: screening the acquired single charging data;
life evaluation module M4: repeatedly calling the life evaluation module M2 and the life evaluation module M3 until the charging data of all charging piles of the electric vehicle in the charging alliance network are obtained;
life evaluation module M5: stitching all the charging data of the electric vehicle;
life evaluation module M6: building a battery life evaluation model;
life evaluation module M7: and importing the stitched charging data into a battery life evaluation model for evaluation to obtain the SOH of the battery at the current moment.
3. The blockchain technology-based charging pile edge computing system according to claim 2, wherein the life evaluation module M3 includes: extracting parameters for battery life evaluation from the acquired charging data, packaging the extracted parameters in a preset data structure, storing the parameters in a server of a charging operation platform, performing abstract extraction through an MD5 or SHA algorithm, and uploading the parameters to a block chain service platform after signing by using a private key of a charging pile; the charging operation platforms of different charging piles have different servers;
the life evaluation module M5 includes:
life evaluation module M5.1: the method comprises the steps that charging data query downloading authorization is requested to a block chain service platform through an electric vehicle block chain DID at a charging pile side, the block chain service platform queries and matches whether the charging pile has data query downloading permission or not in a DID pool according to the block chain DID of the charging pile, and if not, the request is rejected;
life evaluation module M5.2: the block chain service platform authorizes the request with the download authority and sends the authorization to servers of all charging operation platforms in the charging alliance network;
life evaluation module M5.3: the servers of all charging operation platforms in the alliance retrieve whether the charging data blocks of the electric vehicle block chain DID exist in the server according to the authorization, if yes, the charging data blocks are published to a preset theme through an MQTT transmission protocol, and only authorized charging piles can subscribe;
life evaluation module M5.4: the authorized charging pile acquires all charging data of the electric vehicle in each charging node in the charging alliance network in a subscription mode, and calculates the hash value of each downloaded data block respectively;
life evaluation module M5.5: verifying the hash value and the hash value uploaded to the blockchain service platform firstly, confirming the integrity of data, if the data is incomplete, the issuing party re-issues the charging data to a preset theme, and the subscribing party re-downloads the database to calculate the hash value;
life evaluation module M5.6: after the charging pile acquires complete charging data, arranging the data blocks in a time sequence according to the sequence of the timestamps to acquire parameter information required by a battery life evaluation model;
the life evaluation module M6 includes:
life evaluation module M6.1: calculating the fitting slope of the voltage and current values in the preset time period by using a machine learning algorithm, wherein the slope is the current internal resistance value of the battery, and the formula is as follows:
R＝(SUM_VI-SUM_V*SUM_I/Sample_num)/(SUM_II-SUM_I*SUM_I/Sample_num)
wherein SUM _ VI represents the product of voltage and current; SUM _ V denotes a voltage SUM; SUM _ II represents the SUM of the squares of the currents; SUM _ I represents the SUM of currents; sample _ num represents the number of samples;
life evaluation module M6.2: calculating a first limit power according to the current internal resistance value of the battery;
life evaluation module M6.3: calculating a second limit power according to the internal resistance of the factory battery cell;
life evaluation module M6.4: the ratio formed by the first limit power and the second limit power is defined as the current state of health SOH of the battery.
4. The blockchain technology-based charging pile edge computing system according to claim 1, wherein the fee settlement module includes:
the block chain identity authentication and registration module: respectively creating unique block chain DIDs for charging piles and new energy vehicles of different charging platforms by using the Internet of things equipment with the block chain backup capability to obtain the charging pile DID of each charging pile and the new energy vehicle DID of each new energy vehicle;
a wallet creation management module: creating an exclusive wallet for each charging pile DID and each new energy vehicle DID, wherein the charging platform is used as a node in a charging network to own a node wallet;
a charging and billing module: charging and billing processing is carried out according to the electric charge spent by the user in single charging and the charging service charge, and the charging charge is uploaded to a block chain service platform;
a charging fee conditioning module: according to the network effect among the charging platforms, the distribution proportion of the charging service fee is dynamically calculated and used for settlement of the fee among the platforms;
the charging fee settlement module: and (4) the intelligent contract technology is adopted to settle the expenses among the platforms regularly.
5. The blockchain technology-based charging pile edge computing system according to claim 4, wherein the charging billing module comprises:
charging billing module M1: determining whether the charging APP and the charging pile belong to the same charging platform, and recording a flag as 0 if the charging APP and the charging pile belong to the same charging platform, otherwise, recording a flag as 1;
charging billing module M2: generating charging integration converted from 1:1 according to charging cost, wherein the charging integration Tc comprises an electric charge integration Te and a service charge integration Ts, and Tc is Te + Ts;
charging billing module M3: storing the charging credits to corresponding charging pile wallets, and recording ownership information of the charging credits;
the ownership information of the charging integral comprises address information for recording that the charging integral needs to be transferred to a node wallet of a platform to which the corresponding charging pile belongs;
the distribution proportion in the charging fee adjusting and separating module comprises:
π＝func(n_a,n_b,p,c_a,c_b)；(1)
wherein, p is position information when charging occurs; n _ a is the number of charging piles for charging the APP affiliated platform within the range of preset position radius value 1 when charging occurs, n _ b is the number of charging piles for the APP affiliated platform within the range of preset position radius value 2 when charging occurs, c _ a is the number of active users for charging the APP affiliated platform within the range of preset position radius value 1 when charging occurs, and c _ b is the number of active users for charging the APP affiliated platform within the range of preset position radius value 2 when charging occurs; func () represents the distribution proportion of charging service fees calculated by the number of charging piles of the two charging platforms in the preset radius range and the number of active users;
the charging fee settlement module includes:
the charging fee settlement module M1: the node wallet of the platform A periodically sends a charging point extracting instruction to a charging pile wallet under the node wallet of the platform A;
the charging fee settlement module M2: a charging pile wallet under the platform A sends charging points generated by providing charging service within a preset time range to a node wallet address corresponding to the platform A;
the charging fee settlement module M3: the intelligent contract in the platform A node wallet calculates the charging integral to be transferred according to the distribution proportion, and the specific calculation formula is as follows:
Figure FDA0002807767070000041
wherein n represents the number of times of generating effective charging in one settlement period, and effective means that electricity charges and charging service charges are actually generated; ts represents a service charge integral; te represents an electric charge integral; pi represents the distribution ratio; i represents the ith charge;
the charging fee settlement module M4: and the platform A and other platforms respectively utilize the intelligent contract to transfer the generated charging integration points needing to be transferred in a one-to-one correspondence manner and carry out corresponding expense settlement.
6. The block-chain-technology-based charging pile edge computing system according to claim 1, wherein the key management module comprises:
the key management module M1: injecting an equipment key provided by the authentication center into the equipment by using burning software according to the manufacturing parameter information of the equipment of the Internet of things;
the key management module M2: acquiring authentication center result information according to the authentication center control information;
the key management module M3: acquiring key burning result information according to the key burning control information;
the key management module M4: acquiring the adjustment result information of the key box according to the adjustment control information of the key box;
the key management module M5: acquiring the result information of the equipment of the Internet of things according to the parameter control information of the equipment of the Internet of things;
the key management module M6: acquiring data application center setting result information according to the data application center setting information;
the key management module M7: and acquiring the key distribution and identity authentication management result information of the Internet of things equipment based on the block chain technology.
7. The blockchain technology-based charging pile edge computing system according to claim 6, wherein the key management module M1 includes:
the key management module M1.1, the provided material mnemonic word parameter information applies for registration to the authentication center;
the key management module M1.2 is used for providing the device model X and applying for the X-type device key from the authentication center;
the key management module M1.3 is used for providing the X-type equipment production batch number Y for the key box;
the key management module M1.4 is used for injecting the equipment key provided by the authentication center into the equipment by using burning software;
the key management module M2 includes:
the key management module M2.1 generates a master key M and a master key D0 level chain code C according to the material mnemonic word information provided by the equipment provider;
the secret key management module M2.2 generates a D1 level expanded secret key according to the equipment model X, the master secret key M and the D0 level chain code C provided by the equipment manufacturer;
the secret key management module M2.3 is used for injecting the D1-level chain code C1 into secret key burning software of the equipment;
the key management module M2.4 is used for injecting the D1-level key M/X into the key box;
the key management module M2.5 is used for receiving a device public key PK1, a device ID Z and a batch number Y from the data application center;
the secret key management module M2.6 is used for calculating a device public key PK2 by using the D1 level expanded secret key, the batch number Y and the device ID Z;
the key management module M2.7 compares PK1 and PK2 and returns the comparison result to the data application center;
the key management module M2.8 generates: d0 level master key m, D0 level chain code C, D1 level key m/X, D1 level chain code C1;
and the key management module M2.9 is used for storing: master key m at level D0, chain code C at level D0.
8. The blockchain technology-based charging pile edge computing system according to claim 6, wherein the key management module M3 includes:
the key management module M3.1 provides the D1 level chain code C1 to the key box;
a key management module M3.2, receiving a D2 level expanded key from a key box;
a key management module M3.3 for receiving a device ID Z from the device;
the secret key management module M3.4 generates a D3 level expanded secret key by using the D2 level expanded secret key and taking the device ID Z as an index;
the secret key management module M3.5 is used for safely transmitting the D3 level expanded secret key to the device Z;
the key management module M3.6 discards the D2-level expanded key;
the key management module M3.7 generates: d3 level private key m/X/Y/Z, D3 level chain code C3;
and the key management module M3.8 is used for storing: level D1 chain code C1.
The key management module M4 includes:
the key management module M4.1 is used for receiving the D1-level chain code C1 from the key burning software;
the key management module M4.2 is used for receiving the production batch number Y from the X-type equipment;
the key management module M4.3 generates a D2-level expanded key by utilizing the D1-level chain code C1, the equipment batch number Y and a D1-level private key M/X stored in the key management module;
the secret key management module M4.4 is used for safely transmitting the D2-level expanded secret key to the burning software;
the key management module M4.5 generates: d2 level private key m/X/Y, D2 level chain code C2;
and the key management module M4.6 is used for storing: d1 level private key m/X.
9. The blockchain technology-based charging pile edge computing system according to claim 6, wherein the key management module M5 includes:
the secret key management module M5.1 is used for providing the equipment ID Z for the secret key burning software;
the key management module M5.2 is used for receiving the D3-level expanded key from the key burning software;
the key management module M5.3 generates a key index I by using a built-in mnemonic word and a device ID Z of the device and using a BIP39 mechanism;
the secret key management module M5.4 generates a D4 level expanded secret key by utilizing the D3 level expanded secret key and the index I;
the key management module M5.5 discards the D3-level expanded key;
the key management module M5.6 is used for signing the data by using a D4-level private key M/X/Y/Z/I and sending the data to the data application center;
key management module M5.7 generating and storing: d4 level private key m/X/Y/Z/I, D4 level chain code C4;
the key management module M6 includes:
the key management module M6.1 receives the device ID Z, the batch number Y and the application data from the device;
the key management module M6.1 recovers the device public key PK1 from the application data;
the key management module M6.1 sends the equipment public key PK1, the equipment ID Z and the batch number Y to an authentication center so as to verify the equipment identity;
the key management module M6.1 receives the authentication result of the authentication center.
10. A charging pile edge calculation method based on a block chain technology is characterized by comprising the following steps: identity authentication, life evaluation, cost settlement and key management;
the identity authentication step utilizes an asymmetric encryption algorithm and combines related information of a new energy vehicle or a charging device to generate a block chain digital DID (digital information identification) of displacement, and the block chain digital DID is strongly bound with a citizen digital identity EID, so that a digital identity authentication system of the human-vehicle pile is constructed;
in the service life evaluation step, the cracked charging data is stitched by using a block chain technology to obtain complete charging data of the pure electric vehicle, a battery service life model is built by using the completed charging data, and the attenuation of the battery is estimated to form a service life evaluation image of the battery;
the charge settlement step realizes dynamic charge service charge distribution by using a block chain intelligent contract mode according to different network effects of different platforms;
the key management step uses an HDWallet technology to distribute a unique public and private key for each Internet of things device, the private key serves as the identity ID of the device, the identity ID is not reproducible, the authentication center uses the same HDWallet technology to reversely verify the identity information of the device, and cloning or counterfeiting of the device is effectively prevented.
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