KR101302115B1 - Electric vehicle charging device and offline Prepaid charging accounting method - Google Patents

Abstract

The present invention relates to a portable electric vehicle charging apparatus and offline prepaid billing method thereof, which provides a convenient charging service using a portable electric vehicle charging apparatus and prevents charge charge forgery attack even in a difficult installation of a charging infrastructure. A charging apparatus for a portable electric vehicle in a grid environment, comprising: a control unit for blocking and counting passing power in a charging process and calculating a power charge of the counted power; a passing power amount, data and device identification ID received during the charging process, Data storage unit for storing the electric unit price; Status display unit for displaying the amount of passing power changes during the charging process, the charge of the passing power and the corresponding charge service amount, the final amount of charge after the completion of the charge; Recognition of the prepaid card required for charging the electric vehicle It supports; card recognition unit.

Description

Portable electric vehicle charging device and offline prepaid charging accounting method

The present invention relates to charging and charging of an electric vehicle, and in particular, a portable electric vehicle charging apparatus for providing a convenient charging service using a portable electric vehicle charging device and preventing charging charge forgery and attack even in a difficult installation of a charging infrastructure. And its offline prepaid billing method.

Recently, due to the problem of depletion of fossil fuels and air pollution caused by excessive use of fossil fuels, research and development on the use of renewable energy and eco-friendly transportation are being actively conducted.

Among these environmentally friendly vehicles, electric vehicles do not emit air pollutants at all during operation and do not cause noise pollution. In addition, countries around the world are striving for the development and installation of electric vehicle charging systems in order to spread and use these eco-friendly electric vehicles.

Meanwhile, advanced countries including Korea are developing and implementing a smart grid, a new power system that can efficiently manage the grid. Smart Grid is a next-generation power grid for maximizing energy efficiency and efficiently managing power supply by integrating IT technology into the existing power grid and exchanging real-time information between power providers and consumers in both directions.

The smart grid aims to reduce energy waste by increasing energy efficiency and reduce the energy dependence on fossil fuels by activating distributed power sources based on renewable energy.

In addition, the smart grid has a number of advantages, such as the efficient use of power, the production and storage of individual power, the sale of stored electricity through real-time information exchange between consumers and power companies.

One of the most common charging methods we use today is to charge by simply plugging it into a charging outlet.

However, with the development of smart grids and electric vehicles, the use of electric vehicles is expected to be as common as the current vehicles. Therefore, electric vehicles need to be recharged at regular times when the battery of the electric vehicle is low.

There is an urgent need for the development and dissemination of the infrastructure to efficiently manage the charging and charging of electric vehicles using such a smart grid so as not to inconvenience the dissemination and use of electric vehicles.

In the process of selling electricity in the smart grid, there may be a phenomenon in which charge charge forgery attack by an attacker or an electric vehicle charging service are provided and an unjust profit is taken.

In other words, a charge charge forgery attack that incurs more charges by manipulating the electric charging device / meter, or an unfair profit that charges much more than the standard rate from the electric buyers during the electricity sale may occur. Can be.

1 is a configuration diagram showing an example of charging charge forgery attack in the electric vehicle charging process of the prior art.

Smart Grid enables efficient use of power, production and sales of individual power through real-time exchange of information between consumers and power companies. If a safe electric vehicle charging and billing service method is not provided in this power sales process, the electric sales process There may be a phenomenon in which an attacker provides a charge charge forgery attack or an electric vehicle charging service and takes an unjust profit.

When attempting to charge by connecting the electric vehicle 107 to the outlet 102 in the home 101 that does not have a charging infrastructure as shown in Figure 1, the attacker 104 operates the power meter 103 to charge the actual 1KW Although it has been 105, the phenomenon of collecting 106 charge charge of 1.5KW may occur.

These attacks are not a problem at EV charging stations with security, but they can be easily exposed to these attacks in places such as rural areas or homes where there is no EV charging infrastructure and no security. An electric vehicle charging device is needed.

As such, the development of a charging infrastructure and payment method for charging charges due to the popularization of electric vehicles has emerged as an important problem.

The present invention provides a portable electric vehicle charging device and offline prepaid billing method thereof to provide a convenient charging service using a portable electric vehicle charging device even in the difficult installation of the charging infrastructure and to prevent the charge fee forgery attack. There is this.

An object of the present invention is to provide a portable electric vehicle charging device that can provide a convenient charging service using a portable electric vehicle charging device in a place where the charging infrastructure is not installed or difficult to install the charging infrastructure.

The present invention enables to charge the charge charge offline without the help of the center system, to prevent the phenomenon of unfair profit through the charge charge forgery attack and electric vehicle charging service in the offline charge charge payment process, and to the small charge service provider An object of the present invention is to provide an offline prepaid billing method for a portable electric vehicle charging device which can be compensated for a certain service amount.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The portable electric vehicle charging device according to the present invention for achieving the above object is a portable electric vehicle charging device in a smart grid environment, the control and counting of the passing power during the charging process and the power charge of the counted power Control unit for calculating; Passing power amount, data and device identification ID received during the charging process, the data storage unit for storing the unit price; Passing power amount changed during the charging process, the charge and the corresponding charge service amount of the passing power, the final after completion of charging It includes a status display unit for displaying the amount of money information; Card recognition unit for supporting the recognition of the prepaid card required for charging the electric vehicle.

Here, the portable electric vehicle charging device is characterized in that the charging plug is provided on one side, the plug connector is provided on the other side.

When the portable electric vehicle charging device is charged, the charging plug provided in the charging device of the electric provider is connected to an outlet of the electric provider, and the plug connector provided in the charging device of the electric provider is provided in the charging device of the electric consumer. The charging plug is connected and the plug connector provided in the charging device of the electric consumer is characterized in that the plug of the electric vehicle is connected.

In addition, the portable electric vehicle charging device of the electric provider connected to the charging and the portable electric vehicle charging device of the electric consumer are compared with the charging amount, unit price, charging rate data during the charging process, and the electric vehicle charging and It is characterized by preventing the forgery attack in the charging process.

The portable electric vehicle charging device may include a selector switch for selecting whether the portable electric vehicle charging device is used at the electric provider side or at the electric consumer side.

And the control unit, the power control unit to block the passage of the current in the initial state and to allow the passage of the current only when a certain condition is satisfied, the passing power counting unit for counting the passing power, and the power rate calculation for calculating the power rate of the corresponding counting power And a power counter initialization unit for initializing an existing counting record to count the next passing current when charging is completed.

The data storage unit includes: a pass-through power storage unit for storing the amount of power passing through the charging process; an electrical unit price storage unit for storing an electric unit price required for charging charge calculation; and an ID storage unit for storing device identification IDs; It is characterized in that it comprises a charge elapsed time storage unit for informing the user the charging time elapsed time, and a received data storage for storing the received data.

The card recognizing unit may increase or decrease the card balance by offline charging the real-time charging cost and the settlement according to the amount of electricity passed.

The offline prepaid charging method of the portable electric vehicle charging device according to the present invention for achieving another object is that the charging device of the electric provider and the charging device of the electric consumer is electrically coupled between the outlet of the electric provider and the electric vehicle plug of the electric consumer In the control of the charging device connected to, by allowing offline prepaid billing, allowing the charge only when the balance of the card of the other party is higher than the basic charge rate; Real-time charging and charging charges are displayed in real time, Displaying the balance of the card; The charging device of the electricity provider and the charging device of the electric consumer during the charging process to prevent the charge charge forgery attack in the offline charging fee payment process by transmitting and receiving the charging information; Charge amount and charge service amount Is updated in real time and charging is complete And displaying an electricity sale amount, a charge service amount, and a final amount, and performing an offline charge fee payment.

Here, the offline prepaid billing, the electric consumer owns a prepaid card precharged and the amount is reduced in real time by the electric charge amount and service amount of the prepaid card in accordance with the increase in the electric charge amount of the electric vehicle, the electricity provider also prepaid card As the number of owned and sold electricity increases, the prepaid card amount of the electric seller increases in real time by the amount of electricity sold and the service amount.

And in the step of preventing the charge charge forgery attack, the charging device of the electricity provider and the consumer of the electricity transmits the amount of passing current, the charge charge information calculated by the self to the other party, and the other party receiving the information received Comparing the passing current amount, the charge rate information and the charge current amount, the charge rate information calculated by the user, if the two values are different, the counterfeit attack characterized in that the counterfeiting attack.

And in the charging control of the charging device of the electric provider, the step of connecting the electric vehicle plug, portable electric vehicle charging apparatus and outlet of the electric consumer side, checking the charge request sent by the electric consumer side and the balance of the electric consumer And permitting the electric vehicle to be charged and passing the electric power when the balance of the electric consumer side is greater than the basic charge rate, and when the charging completion information is received during the charging, stopping the charging of the electric vehicle, or Determining whether the remaining amount after subtracting the charge and service amount corresponding to the passing power from the balance of the electric consumer side is greater than 0, and if it is greater than 0, continue charging the electric vehicle and calculate information such as the calculated amount and service amount. Real-time updating step, and if the remaining amount is less than 0, stop charging the electric vehicle And is characterized in that it comprises an amount of electricity sales and services amount, displaying the final amount.

And in the charging control of the charging device of the electric consumer, the step of connecting the electric vehicle plug, portable electric vehicle charging device, the outlet, and the balance of the user on the consumer side of the charge more than the basic charge, charge request signal to the electricity provider Transmitting the power, allowing the power to pass when receiving the charging permission from the electricity supplier, and stopping the charging when receiving the charging information of the electric vehicle in the charging state, or passing power from the balance of the prepaid card. Determining whether the remaining amount minus the charge charge and service amount corresponding to is greater than 0, and if greater than 0, continue charging the electric vehicle and update the calculated charge and service amount information in real time, and the remaining amount is If it is less than 0, the electric vehicle stops recharging, and the amount of electricity sales, service amount, and maximum Characterized in that it comprises a step of displaying the amount of money.

And the step of preventing the charge charge forgery attack, at a predetermined time interval to check the real-time charge amount, service amount, balance information in real time during the charging process, the electricity purchase time from the consumer-side charging device to the electricity provider-side charging device Transmitting the unit price and charge amount information when purchasing the electricity, comparing the amount of charge received by the charging device of the electricity provider with the current passing amount measured by the electricity provider; and if the two values are the same, there is no counterfeit attack during the charging process. And judging the electricity sales volume, the electricity sales price calculated by the customer, and the corresponding service fee, and when the electricity provider transmits the electricity purchase time and the calculated electricity sales rate information, the electricity consumer receives the electricity purchase time and himself / herself. Comparing the electric purchase time sent to determine whether a forgery attack exists in the message. By comparing the charge amount calculated by yourself with the recorded electricity price and the received electricity sales rate, if it is the same, it is determined that there is no forgery attack in the charging process and repeats the steps of updating the charge amount calculated by the user and the charge rate calculated by the user. It is characterized by.

And in order to refund the electricity charges after paying the offline charge fee, if the prepaid card is connected to the electricity bill refund machine, receiving the electricity sales amount, electricity sale date, card record electricity unit price information from the card, and received card record posting Comparing the unit price with the real-time unit price, if the result of the comparison is different, recalculates the electricity sales rate using the current electricity unit price, the electricity sales date, the current electricity unit price, and the recalculated electricity sales rate in the electricity bill refund machine. The prepaid card compares the received electricity sale date with the transmitted electricity sale date to determine whether there is a forgery attack, and recalculates the electricity sale rate based on the received current electricity price. And comparing the calculated electricity sales rates to notify the accuracy of the sales rates.

And it is possible to check the card cumulative electricity sales amount and the corresponding electricity sales charges in the electricity bill refund machine, the user can withdraw the electricity sales charges in cash from the electricity bill refund machine by clicking the refund button.

Such a portable electric vehicle charging device and offline prepaid charging method thereof according to the present invention has the following effects.

First, it is possible to provide a convenient charging service using a portable electric vehicle charging device in a place where the charging infrastructure is not installed or difficult to install the charging infrastructure.

Second, it is possible to pay the charge charge offline without the help of the center system, there is no need to communicate with the center system has the effect of reducing the cost to support power line communication or existing wired and wireless network communication.

Third, the offline prepaid billing using a portable electric vehicle charging device can pay real-time charging fee even in places where communication with the center system is difficult.

Fourth, the charge fee forgery can be prevented by the electricity provider and the electric consumer by comparing the charge and billing information calculated by the electricity provider at regular time intervals.

Fifth, the amount of electric charges and a certain percentage of services are reduced by the amount of electricity charged by the electric vehicle on the card of the electric consumer, and the amount of electricity sales and a certain amount of services are increased by the amount of electricity sold on the card of the electric provider. There is an effect that the charging service provider is compensated for a certain service amount.

1 is a configuration diagram showing an example of charge rate forgery attack in the electric vehicle charging process of the prior art
2 is a block diagram showing a charging process using a portable electric vehicle charging apparatus according to the present invention
3a and 3b is a block diagram of a portable electric vehicle charging device according to the present invention
4 is a block diagram showing the configuration of a portable electric vehicle charging device according to the present invention.
5a and 5b is a flow chart showing a charging and offline prepaid charging method of a portable electric vehicle charging apparatus according to the present invention.
6 is a flow chart showing a charging charge forgery attack prevention and offline charging method of a portable electric vehicle charging device according to the present invention.
7a and 7b is a flow chart showing a charge charging method and a charge refund method of the prepaid card of the portable electric vehicle charging apparatus according to the present invention.

Hereinafter, a preferred embodiment of a portable electric vehicle charging device and an offline prepaid charging method thereof according to the present invention will be described in detail.

Features and advantages of the portable electric vehicle charging apparatus according to the present invention and its offline prepaid charging method will become apparent from the detailed description of each embodiment below.

Figure 2 is a block diagram showing a charging process using a portable electric vehicle charging apparatus according to the present invention, Figure 3a and Figure 3b is a block diagram of a portable electric vehicle charging apparatus according to the present invention.

4 is a block diagram of a portable electric vehicle charging device according to the present invention.

The present invention is to enable convenient charging and reliable payment in places where the charging infrastructure is not established as follows.

For example, when you drive an electric car and do not have an electric vehicle charging infrastructure, such as the countryside, or go out where it is difficult to find an electric car charging station, you unexpectedly run out of batteries and charge the electric car before arriving home. This may be necessary.

In this case, if there is a portable electric vehicle charging device that can perform charging and charging functions, it is more convenient to charge the electric vehicle and pay the corresponding charge at places such as homes, convenience stores, and rest areas that have the same portable electric vehicle charging device. You can do it.

The portable electric vehicle charging apparatus and offline prepaid charging method thereof according to the present invention have the following features.

First, we initiated an offline prepaid billing method that enables charging of offline charges without the help of a portable electric vehicle charger and a center system that can provide convenient charging services where charging infrastructure is not installed or where it is difficult to install. do.

Second, a method of preventing an unjust profit through a charge charge forgery attack and an electric vehicle charging service in an offline charge rate payment process.

Third, a method of allowing a small charge service provider to be compensated for a certain service amount in an offline charge fee payment process.

Fourth, if the balance of the other party's card is more than the basic charge rate, the electric charge is allowed, real-time electric charge amount and charge rate are displayed, the balance of the card is displayed in real time, and the charge charge forgery attack prevention process in the offline charge rate payment process is performed. It provides a, and includes a technology that allows a small charge service provider to be compensated for a certain service amount in the offline charging fee payment process.

Fifth, the electric consumer owns a prepaid card with a certain amount of charge in advance, and the amount is reduced by the corresponding electric charge amount and service amount of the prepaid card as the electric vehicle electric charge increases, and the electric provider also owns the prepaid card and increases the electric sales volume. According to the present invention includes a technology configuration in which the amount of the prepaid card of the electric seller increases by the amount of the electric sale and the service amount.

Sixth, the electricity provider and the electric consumer transmit the information, such as' pass current amount 'and' charge rate, calculated by themselves to the other party at a predetermined time, and the other party receiving the corresponding value receives the 'pass current amount' and 'charge rate' It compares information such as 'pass current amount' and 'charge rate' calculated by the user, and if the two values are different, it includes a technology configuration that determines that the counterfeit attack is counterfeit.

According to an embodiment, the charging using the portable electric vehicle charging device according to the present invention is performed as shown in FIG. 2, and the portable electric vehicle charging device stored by the electric consumer on the charging plug 204 side of the electric vehicle 203. 206 is connected to the outlet 202 of the home 201 by connecting the portable electric vehicle charging device 205 stored in the electricity provider is made to charge and charge.

Electricity providers and consumers are each responsible for verifying the reliability of their own charging devices, and in the process of charging and charging electric vehicles by exchanging, calculating, and comparing data such as charging amount, unit price, and charging charges between the two charging devices. Counterfeit attack can be prevented.

The appearance of a portable electric vehicle charging device according to the present invention is the same as in Figs. 3a and 3b.

Figure 3a is a charging chip embedded portable electric vehicle charging device, Figure 3b is a portable electric vehicle charging device for recognizing a prepaid card.

The portable electric vehicle charging device according to the present invention has a terminal 301 for connecting to an outlet side, a terminal 302 for connecting to an electric vehicle plug side, an LCD screen 303 for displaying charging related information, and when there is no external power supply. And a switch 304 and a prepaid card recognition unit 305 for allowing information to be displayed on the LCD and for selecting the functions of the electric provider-side charging device and the electric consumer-side charging device.

In order to provide convenience of electric vehicle charging and charging service, the present invention uses a portable electric vehicle charging device that can recognize the prepaid card 306 as shown in FIG. 3b.

That is, after connecting the portable electric vehicle charging device with the outlet and the electric vehicle plug, check the information such as the balance of the prepaid card 306 through the prepaid card recognition unit 305 during the electric vehicle charging process, The amount of money is increased or decreased and the relevant amount of money information is displayed on the LCD 303.

Using a prepaid card such as a transportation card, it is possible to pay a convenient electric vehicle charging fee, as shown in Figure 3a can be used by embedding a chip including a prepaid card function in a portable electric vehicle charging device as needed.

In addition, the portable electric vehicle charging apparatus according to the invention can check the information such as the balance using the switch 304 even in the state of not receiving electricity through a power supply such as an outlet.

Such a detailed configuration of a portable electric vehicle charging device according to the present invention is as follows.

The portable electric vehicle charging device according to the present invention counts the passing power in the charging process largely, calculates the charge of the passing power by the stored electric unit price, displays the information such as the amount of charge and the amount of charge on the LCD display and goes offline. Implement the function to calculate the electric vehicle charging fee.

As shown in FIG. 4, the portable electric vehicle charging apparatus of the present invention includes a controller 410, a data storage unit 420, a status display unit 430, a card recognition unit 440, and a switch 450.

The controller 410 blocks the passage of current in the initial state and satisfies a predetermined condition to allow the passage of current, the passing power counting unit 412 for counting the passing power, and the power rate of the counting power. It includes a power charge calculator 413 for calculating a, and a power counter initializer 414 for initializing the existing counting record to count the next pass current when the charge is completed.

The data storage unit 420 includes a pass power storage unit 421 for storing the pass power, an electric unit price storage unit 422 for storing the electric unit price required for charging charge calculation, and an ID storage unit for storing the device identification ID. The unit 423 includes an elapsed charge time storage unit 424 for notifying the user of the charging time and a received data storage unit 425 for storing the received data.

In addition, the status display unit 430 displays information such as the amount of power passed, the charge value of the power passed, the corresponding charge service amount, the final amount after the completion of charging.

In addition, the card recognition unit 440 supports the recognition of the prepaid card required for charging the electric vehicle, and increases / decreases the related rate of the card according to the real-time charging cost calculation and the amount of electricity passed through the card recognition unit 440. .

Hereinafter, the charging and offline prepaid charging process of the portable electric vehicle charging device according to the present invention will be described in detail.

5A and 5B are flowcharts illustrating a charging and offline prepaid charging method for a portable electric vehicle charging device according to the present invention.

In order to provide an electric vehicle charging and charging service, the present invention requires a portable electric vehicle charging device at each of an electric consumer side and an electric provider side, and whether the portable electric vehicle charging device is at the electric consumer side or at the electric provider side. There is a difference in the control method, the difference in the control method of the portable electric vehicle charging device in the two cases are as follows.

First, the control method of the charging device of the electricity provider side is as follows.

In the case of using the electric provider-side charging device (S501), it is also possible to manually select the switch as the electric-provider-side charging device, or to automatically determine whether to use the electric provider side or the electric consumer side.

The control of the charging device on the electricity provider side is initially connected to the electric vehicle plug, the electric vehicle charger and the portable electric vehicle charger and the outlet (S512), as shown in Figure 5a, at the electric consumer side Check the charge request sent and the balance of the electric consumer (S513).

If the balance on the consumer side is greater than the basic charge rate (S514) permits charging of the electric vehicle (S515) and passes the power (S516).

If the balance on the consumer side is less than the basic charge rate, the charging of the electric vehicle is cut off (S523).

Subsequently, when charging completion information is received during charging of the electric vehicle (S517) (S518), the portable electric vehicle charging device stops charging of the electric vehicle (S523), and if the charging completion information is not received, the current prepaid card It is determined whether the remaining amount minus the charging charge and service amount corresponding to the passing power from the balance is greater than zero.

If greater than zero, the charging of the electric vehicle continues to be performed (S520), and information such as the calculated charging amount and service amount is updated in real time on the LCD.

On the other hand, if the remaining amount is less than 0, the charging of the electric vehicle is stopped (S523), and the electric sales amount, service amount, and final amount are displayed (S524).

After updating the information of the LCD, after a predetermined time, the above procedure is repeated again (S522), and this repeating process is repeated until the charging of the electric vehicle is completed.

That is, after updating the information on the LCD, it is determined whether the completion of charging message has been received or the remaining amount after subtracting the charge amount and service amount corresponding to the passing power from the balance of the current prepaid card is not greater than zero, and has not received the charge completion information. If the amount is greater than zero, continue charging and update the LCD real time information.

And the control method of the electric consumer-side charging device is as follows.

In the case of using the electric consumer-side charging device (S502), it is also possible to manually select the switch as the electric consumer-side charging device, or to automatically determine whether to use the electric provider side or the electric consumer side.

The electric consumer-side charging device initially connects the electric vehicle plug, the portable electric vehicle charger, and the outlet in the state of shutting off the electricity (S531).

And only if the balance of the consumer's own balance is more than the basic charge rate (S533), and transmits a charge request signal to the electricity provider (S534), and receives the charge permission from the electricity supplier (S535), the power is allowed to pass (S536)

If his balance is less than the basic charge rate, the charging of the electric vehicle is cut off (S543).

Subsequently, when the charging completion information of the electric vehicle is received (S537) (S538), the portable electric vehicle charging device stops charging the electric vehicle (S543), and if the charging completion information is not received, The remaining amount of the prepaid card minus the charge and service amount corresponding to the passing power is determined to be greater than zero (S539). If greater than zero, the charging of the electric vehicle is continued (S540). Information such as service amount is updated in real time on the LCD. (S541)

On the other hand, if the remaining amount is less than zero stops the charging of the electric vehicle (S543).

After a certain period of time after updating the information of the LCD, the above procedure is repeated again, and this repetition process is repeated until the charging of the electric vehicle is completed.

That is, after updating the information of the LCD, it is determined whether the completion of charging message is received or the remaining amount after subtracting the charge amount and service amount corresponding to the pass power from the balance of the current prepaid card is greater than 0, and did not receive the charge completion information. If the amount is greater than zero, continue charging and update the LCD real time information.

Hereinafter, a charging charge forgery attack prevention and offline charging method of the portable electric vehicle charging apparatus according to the present invention will be described in detail.

6 is a flow chart illustrating a charging charge forgery attack prevention and offline charging method of a portable electric vehicle charging device according to the present invention.

In the present invention, in order to provide a convenient charging service in a place where the electric vehicle charging infrastructure is not installed, and to provide a safe and offline charging service that prevents forgery attack, the electric vehicle charging is performed in the following manner.

In the present invention, since the electric providing vehicle-side charging device and the consumer-side charging device are directly connected and communicated without using a weak wireless communication method, there is little risk of a third party's eavesdropping attack and forgery attack.

Therefore, the electric provider-side charging device uses only a method of checking whether the data sent from the electric consumer-side charging device is forged or not, and the electric consumer-side charging device only checks whether the data is sent from the electric provider-side charging device.

First, the outlet of the electric provider side, the electric provider side charging device, the electric consumer side charging device, the electric vehicle plug is connected (S611).

If the balance of the electric consumer-side charging device is greater than the basic charging fee (S612), the electric consumer-side charging device sends a charging request to the electric provider-side charging device (S613).

The electricity provider-side charging device requests a balance check request to the electricity consumer-side charging device before passing power (S614), and if the balance of the electricity consumer-side charging device included in the received balance notification message (S615) is greater than the basic charge rate ( In step S616, the charging device of the electricity provider performs charging permission notification and charging start (S617).

Subsequently, charging of the electric vehicle is started and during the charging process of the electric vehicle (S618), in order to update the real-time charge amount, service amount, balance information, etc. on the LCD screen, the electric provider side charging device and the electric consumer side charging device have a predetermined time interval. Repeat the following process (S627).

That is, when the electric purchase time, the electric appliance purchase price, and the charging amount information are transmitted from the electric consumer-side charging device to the electric provider-side charging device (S619), the electric provider-side charging device receives the current passing amount measured by itself and the electric charge amount. Compare (S620).

As a result of the comparison, if the two values are the same, it is determined that there is no forgery attack in the charging process, and the electricity sales amount (that is, the current passing amount thereof), the electricity sales rate calculated by him, and the corresponding service charge are displayed or updated on the LCD.

In addition, when the electricity provider transmits the electric purchase time and the calculated electric sales charge information (S622), the electric consumer compares the electric purchase time received with the electric purchase time sent by the user and checks whether there is a forgery attack in the message. (S623)

In addition, by comparing the result of multiplying the charge amount calculated by the electric charge and the received electric sales charge (S624), if it is the same, it is determined that there is no forgery attack in the charging process, and the charge amount calculated by the user and the charge rate calculated by the user are displayed on the LCD. (S625).

In addition, check whether the charging of the electric vehicle is completed or the balance of the electric consumer's charging device is less than the basic charging fee (S626).

While repeating the above process (S627), if the charging of the electric vehicle is completed or the balance of the electric consumer-side charging device is less than the basic charge rate, the electric consumer-side charging device notifies the electric provider-side charging device of the charging completion message. (S628)

In this way, the charging of the electric vehicle is stopped (S629), and the charging device of the electric provider side and the consumer side displays information such as the amount of charge, the charge amount, the service amount, and the final amount of the electric vehicle on the LCD (S630).

As described above, the portable electric vehicle charging device according to the present invention exchanges information such as an electric unit price, a charge amount, etc. in the electric vehicle charging device and the electric consumer charging device during the charging process, and compares the calculated value with the received value. This prevents counterfeit attacks in the charging and charging of electric vehicles.

Hereinafter, a method of charging a charge and a method of refunding a prepaid card of a portable electric vehicle charging device according to the present invention will be described in detail.

7A and 7B are flowcharts illustrating a charge method and a charge refund method of a prepaid card of a portable electric vehicle charging device according to the present invention.

Electric vehicle owners need portable electric vehicle chargers on the consumer's side to charge the electric vehicle, and electric sales service providers require portable electric vehicle chargers on the electricity provider's side to provide charging and collect charges. need.

The portable electric vehicle charging device according to the present invention should include a chip including a charging function as shown in FIG. 3 or include a recognition function of a prepaid card such as a transportation card. In addition, in order to charge and charge the electric vehicle, it is necessary to charge the electric vehicle charging device or charge the prepaid card.

The prepaid card purchase method required for charging and charging of electric vehicles, the prepaid card charging method for the electric vehicle charging device or prepaid card is the same as the prepaid card purchase method for subway, public bus, prepaid card charge charging method.

In the prepaid card charge charging method, as shown in FIG. 7A, first, the prepaid card is connected to the machine (S711), the desired charge amount is selected (S712), and the corresponding cash is input into the machine (S713), while charging (S714). Is displayed and charging is completed after a while (S715).

However, there is a slight difference in the method of providing the electricity sales service to cash back the sales electricity recorded on the prepaid card.

The present invention uses an off-line method when charging the electric vehicle charges, and because of the characteristics of the smart grid there may be a difference in the unit price every time, proceeds as follows how to refund the amount of electricity sold on the card in cash.

As shown in FIG. 7B, when a prepaid card is first connected to an electric bill refunding machine (S721), the electric bill refunding machine receives related information such as an electric sales amount, an electric selling date, and a card record electric unit price from the card (S722). The charge refunding machine compares the received card record electricity price with the real-time electricity price (S723), and if the comparison result is different, recalculates the electricity sales charge with the current electricity price (S724).

If the electricity bill refund machine sends the electricity sale date, the current electricity price, and the recalculated electricity sale fee to the card (S725), the card compares the received electricity sale date with the transmitted electricity sale date (S726). Check whether there is, and also compare the sales price calculated by recalculating the electricity sales rate by the current electricity price received and the recalculated electricity sales rate received (S727), if the comparison result is the same, the sales rate Notify the accuracy of (S728).

At this time, the electricity bill refund machine can check the card cumulative electricity sales amount and the corresponding electricity sales charges (S729), and the user can withdraw the electricity sales charges in cash from the electricity bill refund machine by clicking the refund button (S730). (S731)

When the cash withdrawal and the cash receipt of the user is completed, the electric bill refund machine notifies the card side of the withdrawal completion and reset command (S732), and the card receiving the command resets the cumulative electricity sales amount (S733).

Finally, if the user finds the cash withdrawn from the electricity bill refund machine, the whole process is completed (S734).

As described above, the portable electric vehicle charging device according to the present invention supports offline prepaid charging method, and permits charging when the balance of the counterpart card is larger than the basic charge rate, and displays the electric charge amount and the charge rate in real time. It displays the balance of the card and prevents the charge charge forgery attack during the offline charge payment process.

It will be understood that the present invention is implemented in a modified form without departing from the essential features of the present invention as described above.

It is therefore to be understood that the specified embodiments are to be considered in an illustrative rather than a restrictive sense and that the scope of the invention is indicated by the appended claims rather than by the foregoing description and that all such differences falling within the scope of equivalents thereof are intended to be embraced therein It should be interpreted.

410. Control unit 420. Data storage unit
430. Status display unit 440. Card recognition unit
450. Switch

Claims (16)

In the portable electric vehicle charging device in a smart grid environment,
A control unit which cuts off and counts the passing power in the charging process and calculates a power rate of the counted power;
A data storage unit for storing the amount of power passing through, data and device identification ID received during the charging process, and an electric unit price;
A state display unit for displaying the amount of power passing through the charging process, the charge of the power passing through and the corresponding charge service amount, and the final amount of money after the charging is completed;
It includes; card recognition unit for supporting the recognition of the prepaid card required for electric vehicle charging,
During the charging process, the electric vehicle charging device of the electric provider connected to the charging unit and the portable electric vehicle charging device of the electric consumer are compared with each other through the exchange and calculation of the charge amount, unit price, and charge rate data. Portable electric vehicle charging device, characterized in that to prevent the forgery attack. According to claim 1, The portable electric vehicle charging device,
The charging plug is provided on one side, and the plug connector is provided on the other side of the portable electric vehicle charging device. The method of claim 1, wherein the portable electric vehicle charging device,
The charging plug provided in the charging device of the electricity provider is connected to an outlet of the electricity provider, and the charging plug provided in the charging device of the electric consumer is connected to the plug connector provided in the charging device of the electricity provider and provided in the charging device of the electric consumer. Portable electric vehicle charging apparatus, characterized in that the plug connector is connected to the plug of the electric vehicle. delete According to claim 1, The portable electric vehicle charging device,
And a selector switch for selecting whether the portable electric vehicle charging device is used at the electric provider side or at the electric consumer side. The apparatus of claim 1,
In the initial state, the power control unit blocks the passage of current and allows the passage of current only when certain conditions are satisfied.
A pass power counting unit for counting pass power;
A power rate calculator for calculating a power rate of the counting power;
When the charging is completed, the portable electric vehicle charging apparatus comprising a power counter initialization unit for initializing the existing counting record to count the next passing current. The method of claim 1, wherein the data storage unit,
Pass-through power storage unit for storing the amount of power passing through the charging process,
An electric unit price storage unit for storing an electric unit price required for the charge rate calculation;
ID storage unit for storing the device identification ID,
The elapsed charge storage unit for informing the user about the elapsed charge time,
Portable electric vehicle charging apparatus comprising a reception data storage for storing the received data. The card recognition unit of claim 1,
Portable electric vehicle charging apparatus, characterized in that the increase or decrease of the balance of the card by the offline real-time charging cost calculation and settlement according to the amount of electricity passed. In the control of the charging device in which the electrically coupled charging device of the electricity provider and the charging device of the electric consumer are connected between the outlet of the electrical provider and the electric vehicle plug of the electrical consumer,
Allowing offline prepaid billing to permit charging only when the balance of the other party's card is greater than the basic charging fee;
Displaying a charge amount and a charge rate in real time during charging, and displaying the balance of the card in real time;
Preventing charging charge forgery and attack in the offline charging fee payment process by transmitting and receiving charging information between the charging device of the electricity provider and the charging device of the electric consumer during the charging process;
And updating the charge amount and the charge service amount in real time and displaying the electric sales amount, the charge service amount, and the final amount when the charge is completed, and performing an offline charge fee payment. Offline prepaid billing method. The method of claim 9, wherein the offline prepaid billing,
Electricity consumers own a prepaid card precharged and the amount is reduced in real time by the corresponding amount of electric charge and service of the prepaid card as the amount of electric vehicle electric charge increases,
The electricity provider also owns the prepaid card and supports the way in which the amount of the prepaid card of the electric seller increases in real time by the corresponding electric sales amount and the service amount according to the increase in the electric sales volume. Charging method. The method of claim 9, wherein in the step of preventing the charge charge forgery attack,
The charging device of the electricity provider and the consumers of electricity transmits the calculated amount of passing current and charge rate to the other party at regular intervals.
The other party receiving the information compares the amount of passing current, charge rate information received by the user with the amount of charge current, and charge rate information. If the two values are different, the other party determines that the counterfeit attack has been forged. Offline prepaid charging method for electric vehicle charger. The method of claim 9, wherein the charging control of the charging device of the electricity provider,
Connecting an electric vehicle plug, a portable electric vehicle charger and an outlet on an electric consumer side;
Confirming the balance of the charge request and the electric consumer sent by the electric consumer side;
Authorizing the charging of the electric vehicle and passing the electric power when the balance of the electric consumer side is greater than the basic charging fee;
If charging completion information is received during charging, stopping charging of the electric vehicle, or determining whether the remaining amount is less than zero after subtracting the charging charge and service amount corresponding to the passing power from the balance of the current electric consumer;
If the value is greater than zero, continue charging the electric vehicle and update information such as the calculated charge amount and service amount in real time;
If the remaining amount is less than 0, the charging of the electric vehicle, the off-line prepaid charging method of the portable electric vehicle charging apparatus comprising the step of displaying the electric sales amount and service amount, the final amount. The charging control of the charging device of the electric consumer according to claim 9,
Connecting the electric vehicle plug, portable electric vehicle charging device, outlet;
Sending a charge request signal to the electricity provider only if his balance is greater than the basic charge rate;
Allowing power to pass when receiving a charge from the utility provider;
Receiving the charging completion information of the electric vehicle in the state of charging stops charging, or determining whether the remaining amount less than the charge charge and service amount corresponding to the passing power from the balance of their prepaid card is greater than zero,
If the value is greater than zero, continue charging the electric vehicle and updating the calculated charge and service amount information in real time;
If the remaining amount is less than 0, the charging of the electric vehicle, the off-line prepaid charging method of the portable electric vehicle charging apparatus comprising the step of displaying the electric sales amount and service amount, the final amount. The method of claim 9, wherein the charging fee forgery attack prevention step,
In order to check the real-time charge amount, service amount, balance information in real time during the charging process,
Transmitting electricity purchase time, unit price at the time of purchase, and charge amount information from the electricity consumer-side charging device to the electricity provider-side charging device;
Comparing the amount of electric charge received by the charging device of the electricity provider with the amount of current passing through the charging device;
If the comparison results in the consumer's charging device is the same, there is no forgery attack during the charging process, updating the electricity sales volume, their own electricity sales charges, the corresponding service charges,
When the electricity provider transmits the electricity purchase time, the calculated electricity sales charges information, the electricity consumer to check the presence of the forgery attack of the message by comparing the electricity purchase time and the electricity purchase time sent by the consumer;
Compare the result of multiplying the unit price by the charge price calculated by the consumer's own charging device and the received electricity sales rate.If it is the same, it is judged that there is no forgery attack during the charging process. Offline prepaid charging method for a portable electric vehicle charging device, characterized in that for repeating the updating step. 10. The method of claim 9, in order to refund the electricity charges after payment of the offline charge fee,
When the prepaid card is connected to the electricity bill refund machine, the electricity bill refund machine receives the electricity sales amount, the electricity sale date, and the card record electricity unit price information from the card;
Comparing the electricity price of the card record received by the electricity bill refund machine with the electricity price in real time, and if the comparison result is different, recalculating the electricity sales rate using the current electricity price;
Transmitting the electricity sales date, the current electricity price, and the recalculated electricity sales fee to the prepaid card in the electricity bill refund machine;
The prepaid card compares the received electricity sales date with the transmitted electricity sales date to check whether there is a forgery attack, and recalculates the electricity sales rate based on the current electricity price received and the recalculated electricity sales. Comparing the rate and notifying the accuracy of the sales rate to the electric charge refund machine; offline prepaid billing method of a portable electric vehicle charging device comprising a. 16. The method of claim 15, wherein the amount of electricity accumulated in the card and the corresponding electricity sales rate can be confirmed in the electricity rate refund machine, and the user can click the refund button to withdraw the electricity sales rate in cash from the electricity rate refund machine. Offline prepaid charging method for a portable electric vehicle charging device characterized in that.

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