CN111861661A - An electric vehicle charging transaction method and device - Google Patents

Abstract

Embodiments of the present invention provide a method and device for charging an electric vehicle. The method includes: acquiring electricity consumption time information and user number information, and querying the user's current reputation value and user points in a blockchain ledger according to the user number information Balance information; according to the electricity consumption time information and the current credit value information of the user, determine the point value consumed by this transaction and the user credit score of this transaction; obtain the user point balance information and the point value consumed by this transaction according to the user point balance information The current point balance information, and the user's current point balance information and the user's credit score for this transaction are written into the blockchain ledger. By designing an account for charging transactions on the blockchain, using electricity points instead of tokens for the circulation of funds can effectively prevent the tampering of transaction information, design a user reputation mechanism, and a service fee calculation model based on user reputation, which is conducive to Promote honest transactions and maintain the healthy operation of the charging transaction market.

Description

An electric vehicle charging transaction method and device

technical field

The present invention relates to the technical field of charging transactions, and in particular, to a method and device for charging transactions of electric vehicles.

Background technique

Electric vehicles have developed rapidly in recent years due to their high energy conversion efficiency and low emissions. However, while my country's electric vehicle industry has achieved leapfrog development, there are still problems of not paying attention to charging piles, charging infrastructure construction and operating mode lag, resulting in the development of vehicles with no piles, more vehicles and fewer piles, etc. phenomenon of coordination.

Private charging piles have obvious sharing economy attributes, huge potential business value, broad development prospects and commercial innovation space. At present, many manufacturers have begun to deploy shared charging piles to solve the problem of difficult charging of electric vehicles.

However, at present, most of the charging pile sharing platforms adopt a centralized management structure, which has the following drawbacks: additional human resources and other costs need to be added, and management is performed manually. , the centralized management platform cannot prove its innocence; once the centralized platform is attacked, there is a risk of user information leakage and transaction data being tampered with, and information security cannot be guaranteed. At present, most charging pile networks are self-organized networks of governments and enterprises. If it is not unified, the cost of establishing credit in cross-operator collaboration is high, and the transaction and payment processes are complicated. At the same time, data interconnection is difficult, and it is easy to form information islands.

Therefore, how to better realize the electric vehicle charging transaction has become an urgent problem to be solved in the industry.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide an electric vehicle charging transaction method and device, which are used to solve the technical problems raised in the above-mentioned background art, or at least partially solve the technical problems raised in the above-mentioned background art.

In a first aspect, an embodiment of the present invention provides an electric vehicle charging transaction method, including:

Obtain electricity consumption time information and user number information, and query the user's current reputation value and user point balance information in the blockchain ledger according to the user number information;

Determine the consumption points value of this transaction and the user's reputation score of this transaction according to the electricity consumption time information and the user's current reputation value information;

The user's current point balance information is obtained according to the user's point balance information and the value of points consumed in this transaction, and the user's current point balance information and the user's credit score of this transaction are written into the blockchain ledger.

More specifically, the point value consumed by the current transaction includes: the point value consumed by charging for the current transaction and the value of the current transaction service point value.

More specifically, the step of determining the point value consumed by this transaction according to the power consumption time information and the user's current reputation value information specifically includes:

Obtain the electricity price coefficient according to the current reputation value information of the user;

The preliminary transaction consumption point value is determined according to the electricity consumption time information and the time-of-use pricing information, and the current charging consumption point value is determined according to the electricity price coefficient and the preliminary transaction consumption point value, so as to charge consumption points according to the current transaction The value determines the value of points consumed by this transaction.

More specifically, after the step of obtaining the user's current point balance information according to the user point balance information and the current transaction point consumption value, the method further includes:

According to the user number information, the current number of transactions of the user is queried in the blockchain ledger;

Calculate a new user reputation value according to the current number of transactions of the user, the value of points consumed by this transaction, and the current user reputation value, and write the new user reputation value into the blockchain ledger.

More specifically, after the step of obtaining the user's current point balance information according to the user point balance information and the current transaction point consumption value, the method further includes:

Obtain the charging pile service rating information for this transaction, and query the charging pile endorsement experience value and charging pile current service rating in the blockchain ledger according to the charging pile number;

Calculate the new charging pile service score according to the charging pile service score information of this transaction, the current service score of the charging pile, the endorsement experience value of the charging pile and the current service score of the charging pile, and write the new charging pile service score into the blockchain ledger.

More specifically, the step of querying the charging pile endorsement experience value in the blockchain ledger according to the charging pile number specifically includes:

Obtain the number of times the charging pile acts as an endorsement node in the blockchain ledger according to the charging pile number;

The number of times the charging pile serves as an endorsement node and the total number of ledger updates are calculated to obtain the endorsement experience value of the charging pile.

More specifically, after the step of determining the consumption points value of this transaction and the user reputation score of this transaction according to the electricity consumption time information and the user's current reputation value information, the method further includes:

Query the current point balance information of the charging pile in the blockchain ledger according to the charging pile number;

Calculate the new charging pile point balance information according to the current transaction point consumption value and the current point balance information of the charging pile, and write the new charging pile point balance information into the blockchain ledger.

In a second aspect, an embodiment of the present invention provides an electric vehicle charging transaction device, including:

The query module is used to obtain electricity consumption time information and user number information, and query the user's current reputation value and user point balance information in the blockchain ledger according to the user number information;

a calculation module, configured to determine the consumption point value of this transaction and the user's reputation score of this transaction according to the electricity consumption time information and the user's current reputation value information;

The transaction module is configured to obtain the user's current point balance information according to the user point balance information and the point consumption value of this transaction, and write the user's current point balance information and the user credit score of this transaction into the blockchain ledger.

In a third aspect, an embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and running on the processor, the processor implementing the program as described in the first aspect when the processor executes the program Describe the steps of the electric vehicle charging transaction method.

In a fourth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, implements the steps of the electric vehicle charging transaction method according to the first aspect.

An electric vehicle charging transaction method and device provided by the embodiments of the present invention, by designing an account for a blockchain charging transaction, and using electricity points instead of tokens for the circulation of funds, can effectively prevent the tampering of transaction information, and ensure that every A charging transaction can be traced back, a user reputation mechanism and a service fee calculation model based on user reputation are designed, which is conducive to promoting honest transactions, combating low-credit user behavior, and maintaining the healthy operation of the charging transaction market.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a network structure diagram of an electric vehicle transaction model described in an embodiment of the present invention;

FIG. 2 is a flowchart of a blockchain charging model transaction according to an embodiment of the present invention;

3 is a schematic flowchart of an electric vehicle charging transaction method described in an embodiment of the present invention;

FIG. 4 is a simulation diagram of the influence of endorsement experience value M on charging service evaluation according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of simulation of the influence of service quality on charging service evaluation according to an embodiment of the present invention;

6 is a simulation diagram illustrating the influence of user reputation Rv on charging service evaluation according to an embodiment of the present invention;

7 is a simulation diagram of the influence of user reputation Rv on charging service evaluation according to another embodiment of the present invention;

FIG. 8 is a simulation diagram of service charging based on user reputation according to an embodiment of the present invention;

9 is a schematic diagram of an electric vehicle charging transaction device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The electric vehicle charging transaction method is built based on the consortium blockchain Hyperledger Fabric, so it is a typical Fabric network structure. Figure 1 is a network structure diagram of the electric vehicle transaction model described in an embodiment of the present invention. The charging transaction application program, the charging pile nodes of each charging operator, the ordering service node and the identity management organization of the charging transaction platform are composed.

The channel is a private atomic broadcast channel divided and managed by the ordering node, which can isolate the information of the channel and make the entities outside the channel inaccessible, thus realizing the security of the transaction.

The charging transaction application is the client node, which sends the user's transaction request to the blockchain network by connecting to the peer node or the ordering service node. Each charging operator company has multiple peer nodes, and smart contracts are stored on each node. All peer nodes are bookkeeping nodes (Commit Peers), responsible for maintaining a copy of the blockchain ledger. Some Peer nodes will execute transactions and endorse the results according to the endorsement policy settings, acting as Endorse Peers. In order to improve the communication efficiency of nodes, there will also be nodes acting as leader peers to communicate with ordering service nodes, responsible for obtaining the latest blocks from ordering service nodes and synchronizing them within the organization. A peer node can act as the master node, endorsement node and accounting node at the same time. The ordering service node is responsible for the ordering of transactions. It receives legal transactions with endorsement signatures and performs global ordering, and packages the ordered transactions into blocks and broadcasts them to peer nodes.

The identity management organization of the charging transaction platform acts as a membership service provider (MSP), providing authorization services for the charging operator's nodes and charging transaction applications.

The blockchain system is a decentralized design, so the consistency of data must be maintained through voting (minority obeys the majority). Any voting needs to go through three processes: proposal -> vote and count the results -> record and publish the majority Agreed proposal. Figure 2 is a flow chart of a blockchain charging model transaction described in an embodiment of the present invention. As shown in Figure 2, a charging transaction application program initiates a transaction proposal to an endorsement node in the channel, and the endorsement node that receives the proposal is verifying After the client is identified, the smart contract is called and simulated to execute (the transaction information will not be written to the ledger at this time), and then the execution result and the respective certificate signature are returned to the client. After the charging transaction application receives a sufficient number of results, it counts and summarizes the execution results of each endorsement node, and signs the proposal with the majority agreement and sends it to the ordering service node. The ordering service node sorts the transactions sent by each client (if the transaction order of each client is uncertain, there may be a double payment problem), and packs it into a block and sends it to the accounting node. Blocks are recorded in their own ledger. Finally, the charging transaction application is notified that the transaction is successful by subscribing to the event.

FIG. 3 is a schematic flowchart of an electric vehicle charging transaction method described in an embodiment of the present invention, as shown in FIG. 3 , including:

Step S1, obtaining electricity consumption time information and user number information, and querying the user's current reputation value and user point balance information in the blockchain ledger according to the user number information;

Step S2, according to the electricity consumption time information and the current reputation value information of the user, determine the point value consumed by this transaction and the user reputation score of this transaction;

Step S3, obtain the user's current point balance information according to the user point balance information and the current transaction point consumption value, and write the user's current point balance information and the user credit score of this transaction into the blockchain ledger.

Specifically, the electric vehicle charging transaction method described in the embodiments of the present invention uses power points to replace tokens to flow capital flows on an electric vehicle charging transaction platform based on blockchain technology. Users can purchase, use, and exchange power points: when the points are insufficient, they can be purchased from power suppliers or other nodes, and the excess points can also be exchanged for electricity bills.

The current credit value of the user described in the embodiment of the present invention is that the user evaluates his credit according to his transaction behavior after each electric vehicle charging transaction is completed. One point is deducted. When the user's credit is low, it is restricted from not being able to view the charging pile service score; when the user's credit value is lower than the minimum credit threshold R _min set by the platform, it is restricted from being unable to use the charging service. The minimum credit threshold of this platform is set to 0.

Each charging described in the embodiment of the present invention needs to be determined according to the time-of-use pricing system, and there are also different electricity price coefficients for different credit degrees.

Specifically, the time-of-use pricing system described in the embodiments of the present invention may refer to the time-of-use pricing system of the power grid, that is, the peak-valley electricity price. Each time period can be specifically divided according to the actual situation of the region, for example, 8 hours in the peak section (10:00~15:00; 18:00~21:00), 8 hours in the valley section (23:00~7:00), Flat section for 8 hours (7:00～10:00; 15:00～18:00; 21:00～23:00).

At the same time, the embodiment of the present invention also sets a service pricing mechanism associated with the user reputation value, that is, a user with a higher reputation value needs to pay a lower unit price of the service fee, and vice versa, bear a higher service fee. This mechanism is conducive to promoting low-credibility users to pay in time after the charging transaction is completed to increase the credit value and maintain the stable operation of the platform.

After the charging is completed, execute the steps of transaction settlement according to the smart contract, obtain the charging start time t _start and end time t _end , and divide it into k time periods according to the time-of-use electricity price, and at the same time according to the electricity consumption time information and the user's current reputation value The information determines the value of points consumed by this transaction and the user's reputation score of this transaction. If the user's balance after payment is less than 0, the user's reputation score for updating this transaction is 0; otherwise, the user's reputation score for this transaction is 1, and this transaction The user credit score is used to update the user credit value. When the owner credit value is not greater than 0, the charging service will not be available.

Write the user's current point balance information and the user's credit score for this transaction into the blockchain ledger.

In the embodiment of the present invention, by designing an account for charging transactions on the blockchain, and using electricity points instead of tokens for the circulation of funds, the tampering of transaction information can be effectively prevented, and the traceability of each charging transaction is ensured, and a user reputation mechanism is designed. , and a service fee calculation model based on user reputation, which is conducive to promoting honest transactions, combating low-credit user behavior, and maintaining the healthy operation of the charging transaction market.

On the basis of the above-mentioned embodiment, the point value consumed by the current transaction includes: the point value consumed by charging for the current transaction and the point value of the current transaction service.

The step of determining the point value consumed by this transaction according to the power consumption time information and the user's current reputation value information specifically includes:

Obtain the electricity price coefficient according to the current reputation value information of the user;

The preliminary transaction consumption point value is determined according to the electricity consumption time information and the time-of-use pricing information, and the current charging consumption point value is determined according to the electricity price coefficient and the preliminary transaction consumption point value, so as to charge consumption points according to the current transaction The value determines the value of points consumed by this transaction.

Specifically, the preliminary transaction consumption integral value in the embodiment of the present invention is the integral value of charging consumption calculated when the electricity price coefficient is not considered, and the current charging consumption integral value is the segment consumption calculated after considering the electricity price coefficient the integral value of .

In the embodiment of the present invention, the point consumption value of this transaction is composed of two parts: the charging consumption point value F _c and the service consumption point value F _s , and the formula is as follows:

F _c =f _c ·(E _end -E _start )

F _s =f _s ·(E _end -E _start )

E _end is the power at the end of charging the electric vehicle, and E _start is the initial power. Since the time-of-use pricing is adopted, the total charging power should be the sum of the product of the charging power and the charging time in different electricity price periods, namely:

Among them, P is the charging power of the electric vehicle, t _j is the charging time elapsed in the current electricity price period j, and k is the total number of time periods with different electricity prices that have elapsed during the charging time. The corresponding electricity price is used for charging at different time periods, and the initial transaction consumption point value is obtained. Then, after the initial transaction point value is multiplied by the electricity price coefficient, the current charging consumption point value F _c and the service consumption point value F _s are calculated. Methods as below:

Combined with the calculation method of the service fee bill f _s , the formula for the point value F consumed by this transaction is as follows:

The embodiment of the present invention proposes an electricity price adjustment mechanism, which is beneficial to eliminate peaks and fill valleys, reduce the loss of power equipment, and promote the user's charging behavior to be more reasonable.

On the basis of the above embodiment, after the step of obtaining the user's current point balance information according to the user's point balance information and the current transaction point consumption value, the method further includes:

According to the user number information, the current number of transactions of the user is queried in the blockchain ledger;

Calculate a new user reputation value according to the current number of transactions of the user, the value of points consumed by this transaction, and the current user reputation value, and write the new user reputation value into the blockchain ledger.

Specifically, after each completion of the electric vehicle charging transaction, the user evaluates his credit Rv according to his transaction behavior. The formula is as follows:

C _vk is the points obtained or deducted by user v when the kth charging service is completed. The value of C _vk satisfies C _vk ∈ {-1, +1}, and the user pays in time after the previous charging transaction to get a point reward, Otherwise, one point will be deducted. When the user's credit is low, it is restricted from not being able to view the charging pile service score; when the user's credit value is lower than the minimum credit threshold R _min set by the platform, it is restricted from being unable to use the charging service. The minimum credit threshold of this platform is set to 0.

By designing a user reputation mechanism and a service fee calculation model based on user reputation, the embodiment of the present invention is beneficial to promote honest transactions, combat low-credit user behavior, and maintain the healthy operation of the charging transaction market;

On the basis of the above embodiment, after the step of obtaining the user's current point balance information according to the user's point balance information and the current transaction point consumption value, the method further includes:

Obtain the charging pile service rating information for this transaction, and query the charging pile endorsement experience value and charging pile current service rating in the blockchain ledger according to the charging pile number;

Calculate the new charging pile service score according to the charging pile service score information of this transaction, the current service score of the charging pile, the endorsement experience value of the charging pile and the current service score of the charging pile, and write the new charging pile service score into the blockchain ledger.

Specifically, in order to encourage each charging service node to participate in the endorsement when verifying the transaction and maintain the stable operation of the blockchain charging transaction platform, the endorsement experience value should be incorporated into the evaluation system of the charging pile service. The endorsement experience value M is determined by the frequency of nodes participating in endorsement, and the calculation formula is as follows:

l is the number of ledger updates that the node has previously acted as an endorsement node, and L is the total number of ledger updates. δ is a parameter for adjusting the endorsement experience value.

The charging pile service rating information R _{cs, n} is updated with the increase of the number of transactions n. The service evaluation of the charging pile is determined by the ratings and endorsement experience values given by users with different credit values, and at the same time, the low rating in the early stage is considered to improve the service level. After the evaluation of the impact, the formula is as follows:

Among them, R _cs,n is the charging service rating information of the charging pile last time, and the parameter α determines the speed of the service rating information change after each rating. By adjusting the value of α, the node with a lower rating can not improve the service after improving the service. It will always be affected by low scores in the past, α>1, the larger the α, the longer the influence of past evaluations. M is the previously calculated endorsement experience value, W _n is the score made by the user whose credit value is R _v , and the range of W _n in this platform is set to W _n ∈ {1, 2, 3, 4, 5}. _En is the expected score expectation of the charging pile in this service, and s(R) is a damping function that makes the change of the charging pile service score smooth. σ is a parameter in the damping function. The larger the σ, the smoother the damping function. In this system, the value of σ is set to 0.8.

The embodiment of the present invention proposes a charging pile service evaluation mechanism, which takes into account the influence of the number of endorsements of nodes, which is beneficial to encourage nodes to participate in endorsement and maintain the stable operation of the blockchain trading platform; at the same time, the mechanism fully considers the evaluation The influence of user reputation value and historical evaluation on service score.

On the basis of the above embodiment, after the step of determining the point value consumed by the current transaction and the user credit score of the current transaction according to the electricity consumption time information and the current credit value information of the user, the method further includes: :

Query the current point balance information of the charging pile in the blockchain ledger according to the charging pile number;

Calculate the new charging pile point balance information according to the current transaction point consumption value and the current point balance information of the charging pile, and write the new charging pile point balance information into the blockchain ledger.

In another embodiment of the present invention, after the charging is completed in the embodiment of the present invention, the specific steps for the smart contract to perform transaction settlement are as follows:

①Get the electric vehicle number carID, charging pile number stationID and charging power P;

② Obtain data such as the balance and credit value of the car owner and the charging pile through the account book query interface GetState();

③ Obtain the charging start time t _s t _ar t and end time t _end , and divide it into k time periods according to the time-of-use electricity price;

④ Calculate the charging fee that the user must pay by using parameters such as charging power, k time periods and the corresponding electricity price, and deduct the corresponding amount from the owner's balance and add it to the balance of the charging pile;

⑤ If the user's balance after payment is less than 0, update C _vj = 0 this time; otherwise, C _vj = 1, C _vj is used to update the user's credit value. When the owner's credit value is not greater than 0, the charging service will not be available.

⑥PutState() the new user balance and charging pile balance to the blockchain ledger.

In another embodiment of the present invention, use Python and matplotlib libraries to conduct simulation experiments on a charging pile service evaluation model and a service fee calculation method based on user reputation. The first simulation is carried out in three parts. The influence of endorsement experience value M, user rating W, and user reputation value R _v on the charging pile service rating curve is observed through the data of the simulation experiment. In order to make the simulation data close to the real situation, the normal distribution N(μ, σ ² ) is used to simulate the user's service rating of the charging pile. It is expected that μ can roughly reflect the objective rating under a certain service quality, and the user's reputation value R _v is subject to uniform distribution U(a, b); the second simulation verifies the influence of user reputation on service fee in the service fee charging model, and explores the influence of parameters ρ and θ on the relationship between reputation and service fee to adapt to different fine-tuning of the model.

1. Simulation of charging pile service evaluation model

1) The influence of endorsement experience value M

Under a certain service quality and user reputation value, observe and analyze the impact of the number of charging piles participating in the blockchain charging transaction endorsement on its service evaluation. Under the three sets of data, the user scores W obey the normal distribution N (4, 0.25), and the user reputation value R _v obeys the uniform distribution U (0.6, 0.8). The activity of the charging pile nodes participating in the transaction endorsement can be determined by the endorsement experience value M reflect, 0.1, 0.5, 0.8, respectively.

The initial score of the charging pile is 0. Figure 4 is a simulation diagram of the impact of the endorsement experience value M on the charging service evaluation according to an embodiment of the present invention. As shown in Figure 4, after about 300 iterations of transaction scores, The service evaluation value of the charging pile is stable at the expected value μ=4 of the normal distribution of user ratings, which objectively reflects its service quality level and meets expectations. It is easy to see that under the same circumstances, the higher the endorsement experience value M, the higher the service evaluation of the node and the faster the stable score is achieved, which is conducive to encouraging the charging pile nodes to contribute computing power and maintaining the stable operation of the blockchain charging trading platform. .

2) The impact of service quality

The user score W obeys a normal distribution, which can roughly reflect the user score under a specific service quality. Several normal distributions with different expected values μ represent the different service quality provided by the charging pile. Under the same circumstances, the influence of the service quality provided by the charging pile on its service score was explored. Under the three sets of data, the charging pile endorsement experience value M was 0.2, and the user reputation value R _v obeyed the uniform distribution U (0.6, 0.8). The charging service quality provided by the pile is represented by the user score W, which obeys the normal distribution N(2.5, 0.25), N(3.5, 0.25), and N(4.5, 0.25) respectively. The initial value of the charging pile service evaluation is set to a low score of 1.5. Figure 5 is a schematic diagram of the simulation of the impact of the service quality on the charging service evaluation according to an embodiment of the present invention. As shown in Figure 5, after about 200 iterations of transaction scoring , the charging pile service evaluation is stable, and is stable on the expected value μ of their respective distributions. The user rating obeying N(4.5, 0.25) has the highest service score, and finally stabilizes at 4.5 points, followed by obeying N(3.5, 0.25), and the lowest obeying N(2.5, 0.25). It can be seen that the model can eliminate the influence of the previous low score after the charging pile improves its service quality level, and the higher the service quality, the higher the final service evaluation.

3) The influence of user reputation value R _v

A good charging service evaluation model should take into account the user's creditworthiness. Users with low creditworthiness may score randomly or deliberately. The parameter _Rv in the evaluation model reflects the user's creditworthiness to the charging pile service score. Impact. FIG. 6 is a simulation diagram of the influence of user reputation Rv on charging service evaluation according to an embodiment of the present invention. As shown in FIG. 6 , the endorsement experience values of charging piles under the three sets of data are all 0.5, and the obedience user score is N ( 4.5, 0.25) normal distribution, the user's reputation value declines in steps, obeying the uniform distribution of U(0.2, 0.4), U(0.4, 0.6), U(0.6, 0.8). It can be seen that the curve of the user reputation subject to the uniform distribution U(0.6, 0.8) reaches stability after about 300 iterations of transaction evaluation, while the credibility of U(0.4, 0.6) is stable after about 400 transaction evaluation iterations At the expected value, the curve with the lowest user reputation value U(0.2, 0.4) is still not stable after 500 iterations.

FIG. 7 is a simulation diagram of the influence of user reputation Rv on charging service evaluation according to another embodiment of the present invention. As shown in FIG. 7 , the experiment is re-run, and the service evaluation of this curve is finally stabilized at the expected value of about 4.5 after 800 iterations. . It can be seen that users with low reputation in this model have less influence on service evaluation, which is conducive to reducing the impact of malicious evaluation on charging pile service scores, and at the same time, it is conducive to promoting users to improve their reputation value and better participate in transaction evaluation. 2. Service billing simulation based on user reputation

In this model, the total charging fee is composed of electricity fee F _c and service fee F _s , of which the service fee F _s can be determined by the blockchain charging transaction model. Users with low reputation may destroy charging piles and preempt charging piles. Therefore, The billing model should take into account the user's reputation value, while taking into account that equipment maintenance costs will increase with the time it is put into use. FIG. 8 is a simulation diagram of service charging based on user reputation according to an embodiment of the present invention. As shown in FIG. 8 , it shows the change of the ratio of service fee F _s / electricity fee F _c with the user reputation value. It can be seen that When the parameters are set to θ=0.1, ρ=1, the ratio decreases with the increase of user reputation, which is beneficial to encourage low-credibility users to reduce service fees by increasing the reputation value; when θ=0.1, ρ=2 When the service fee is The ratio of electricity/electricity fee will decrease faster with the increase of reputation, and the model can be fine-tuned according to the change of user's price sensitivity; when θ=0.16, ρ=1, the ratio has increased compared with the initial situation. Adapt to the increase in equipment maintenance costs.

FIG. 9 is a schematic diagram of an electric vehicle charging transaction device according to an embodiment of the present invention. As shown in FIG. 9 , it includes: a query module 910 , a calculation module 920 and a transaction module 930 ; wherein, the query module 910 is used to obtain electricity consumption time information and user number information, according to the user number information, the user's current reputation value and user point balance information are queried in the blockchain ledger; wherein, the calculation module 920 is used for according to the electricity consumption time information and the user's current reputation value. The information determines the point consumption value of this transaction and the user credit score of this transaction; wherein, the transaction module 930 is used to obtain the current point balance information of the user according to the user point balance information and the point consumption value of this transaction, and assign the user point balance information to the user. The current point balance information and the user credit score of this transaction are written into the blockchain ledger.

The apparatuses provided in the embodiments of the present invention are used to execute the foregoing method embodiments. For specific processes and details, please refer to the foregoing embodiments, which will not be repeated here.

In the embodiment of the present invention, by designing an account for charging transactions on the blockchain, and using electricity points instead of tokens for the circulation of funds, the tampering of transaction information can be effectively prevented, and the traceability of each charging transaction is ensured, and a user reputation mechanism is designed. , and a service fee calculation model based on user reputation, which is conducive to promoting honest transactions, combating low-credit user behavior, and maintaining the healthy operation of the charging transaction market.

FIG. 10 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in FIG. 10 , the electronic device may include: a processor (processor) 1010, a communications interface (Communications Interface) 1020, a memory (memory) 1030, and a communication The bus 1040, wherein the processor 1010, the communication interface 1020, and the memory 1030 complete the communication with each other through the communication bus 1040. The processor 1010 can call the logic instructions in the memory 1030 to perform the following method: obtain the electricity consumption time information and the user number information, and query the user's current reputation value and user point balance information in the blockchain ledger according to the user number information ; Determine the point value consumed by this transaction and the user credit score of this transaction according to the power consumption time information and the current credit value information of the user; obtain the current point value of the user according to the user point balance information and the current transaction consumption point value balance information, and write the user's current point balance information and the user's credit score for this transaction into the blockchain ledger.

In addition, the above-mentioned logic instructions in the memory 1030 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

An embodiment of the present invention discloses a computer program product, where the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer, The computer can execute the methods provided by the above method embodiments, for example, including: obtaining electricity consumption time information and user number information, and querying the user's current reputation value and user point balance information in the blockchain ledger according to the user number information; Determine the point value consumed by this transaction and the user credit score of this transaction according to the electricity consumption time information and the current credit value information of the user; obtain the current point balance of the user according to the user point balance information and the current point consumption value of the transaction information, and write the user's current point balance information and the user's credit score for this transaction into the blockchain ledger.

Embodiments of the present invention provide a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores server instructions, and the computer instructions cause a computer to execute the methods provided in the foregoing embodiments, for example, including: obtaining electricity usage time Information and user number information, according to the user number information, the user's current reputation value and user point balance information can be queried in the blockchain ledger; according to the electricity consumption time information and the user's current reputation value information, determine the consumption of this transaction Point value and the user credit score of this transaction; obtain the user's current point balance information according to the user point balance information and the point consumption value of this transaction, and write the user's current point balance information and the user credit score of this transaction. into the blockchain ledger.

The device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or some parts of the embodiments.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An electric vehicle charging transaction method is characterized by comprising the following steps:

acquiring power utilization time information and user number information, and inquiring current credit value and user point balance information of a user in a block chain account book according to the user number information;

determining a consumption integral value of the transaction and a user credit score of the transaction according to the electricity utilization time information and the current credit value information of the user;

and obtaining the current point balance information of the user according to the point balance information of the user and the consumption integral value of the transaction, and writing the current point balance information of the user and the credit score of the transaction into a block chain account book.

2. The electric vehicle charging transaction method according to claim 1, wherein the consumption credit value of the current transaction comprises: the value of the charge consumption integral of the transaction and the value of the service integral of the transaction.

3. The electric vehicle charging transaction method according to claim 2, wherein the step of determining the consumption credit value of the transaction according to the power consumption time information and the user current credit value information specifically comprises:

acquiring a power utilization price coefficient according to the current credit value information of the user;

And determining a primary transaction consumption integral value according to the electricity utilization time information and the time-sharing pricing information, determining a current charging consumption integral value according to the electricity utilization price coefficient and the primary transaction consumption integral value, and determining a current transaction consumption integral value according to the current transaction charging consumption integral value.

4. The electric vehicle charging transaction method according to claim 1, wherein after the step of obtaining the current point balance information of the user according to the point balance information of the user and the consumption point value of the transaction, the method further comprises:

inquiring the current transaction times of the user in a block chain account book according to the user number information;

and calculating a new user credit value according to the current transaction times of the user, the current transaction consumption integral value and the current user credit value, and writing the new user credit value into a block chain account book.

5. The electric vehicle charging transaction method according to claim 1, wherein after the step of obtaining the current point balance information of the user according to the point balance information of the user and the consumption point value of the transaction, the method further comprises:

acquiring service score information of the transaction charging pile, and inquiring a charging pile endorsement experience value and a charging pile current service score in a block chain account book according to the charging pile number;

And calculating a new charging pile service score according to the charging pile service score information, the charging pile current service score, the charging pile endorsement experience value and the charging pile current service score of the transaction, and writing the new charging pile service score into a block chain account book.

6. The electric vehicle charging transaction method according to claim 5, wherein the step of querying the charging pile endorsement experience value in the blockchain account book according to the charging pile number specifically comprises the following steps:

acquiring the number of times of the charging pile serving as an endorsement node in a block chain account book according to the number of the charging pile;

and (4) carrying out quotient calculation on the number of times of the charging pile serving as the endorsement node and the total number of times of updating the account book to obtain the endorsement experience value of the charging pile.

7. The electric vehicle charging transaction method according to claim 1, wherein after the step of determining a consumption credit value of the transaction and a user reputation score of the transaction according to the power consumption time information and the user current reputation value information, the method further comprises:

inquiring current point balance information of the charging pile in a block chain account book according to the number of the charging pile;

and calculating new charging pile point balance information according to the transaction consumption integral value and the current charging pile point balance information, and writing the new charging pile point balance information into a block chain account book.

8. An electric vehicle charging transaction device, comprising:

the query module is used for acquiring the electricity utilization time information and the user number information, and querying the current credit value and the user point balance information of the user in the block chain account book according to the user number information;

the calculation module is used for determining the consumption integral value of the transaction and the user credit score of the transaction according to the power consumption time information and the current credit value information of the user;

and the transaction module is used for obtaining the current point balance information of the user according to the point balance information of the user and the consumption integral value of the transaction, and writing the current point balance information of the user and the credit score of the transaction into a block chain account book.

9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the program implements the steps of the method of electric vehicle charging transaction according to any of claims 1 to 7.

10. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the electric vehicle charging transaction method according to any one of claims 1 to 7.

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