KR20120133481A - A system of charging an electric vehicle and a method of communicating thereof - Google Patents

Abstract

PURPOSE: An electric vehicle charging system and a communication method thereof are provided to increase the effectiveness of management and operation by providing a communication protocol necessary for the charging system. CONSTITUTION: A central management server system(120) controls a power processing step of an electrical grid(110). A charging unit(130) includes a smart meter(131), a local server(132), and a charger(133). The local server collects necessary information between the electrical grid and an electric vehicle(140) and transmits the information to a power supply unit. The smart meter transmits energy and billing information to the local server. The charger supplies DC electricity to the electric vehicle. [Reference numerals] (110) Electrical grid; (120) Central management server system; (125) Network; (131) Smart meter; (132) Local server; (133,AA,BB) Charger; (140,CC,DD) Electric vehicle or two wheel vehicle; (150) External server

Description

A system of charging an electric vehicle and a method of communicating

The present invention relates to an electric vehicle charging system and a communication method thereof, and more particularly, to a general system for charging an electric vehicle (EV) and a communication method thereof.

Electric vehicles (EVs) are manufactured before gasoline or diesel vehicles, but have not been put to practical use due to problems such as heavy weight of batteries and time required for charging.

However, due to the depletion of fossil energy and environmental pollution, the interest in electric vehicles using electric energy has increased, and research on this is being actively conducted.

An electric vehicle refers to a vehicle that uses electric batteries and an electric motor, that is, electric power, without using petroleum fuel and an engine therefor. As such, the electric vehicle consumes the electricity accumulated in the battery, not the fossil energy, and rotates the motor to drive the vehicle.

However, although the capacity of the battery has increased due to recent technological developments, it is essential to charge the battery of an electric vehicle as fuels are still supplied by gas stations.

Conventionally, gas stations can be built without special equipment, provided that there is a certain space for building an oil depot. However, the charging system of an electric vehicle uses electric energy, and various equipments are required for this purpose. In particular, the electric vehicle charging system requires its own power grid, distribution network, substation, etc. in order to supply a sufficient amount of power, but it requires a lot of space and is not economical in terms of cost.

In addition, considering the fact that power demand is increasing year by year, it is not easy to secure a power grid for stable power supply and supply, and in particular, there are many difficulties in responding to power demand in real time and supplying cheaper power.

For this reason, the electric vehicle charging system is not properly established, so even if the electric vehicle is distributed in the future, it is expected to be difficult to operate the electric vehicle.

One object of the present invention is to provide an electric vehicle charging system.

Another object of the present invention is to provide a communication method for efficient management and operation of an electric vehicle charging system.

Still another object of the present invention is to provide information, a reservation / payment method, and a system therefor for the convenience of a user using an electric vehicle charging system.

In the present specification, an example of an electric vehicle charging system and a communication method thereof according to the present invention are disclosed.

An example of an electric vehicle charging system according to the present invention includes an operation server managing electric vehicle operation information and charger operation information in a web-based web page format, and establishing a database for the information; Chargers for collecting information about an electric vehicle and transmitting the collected information to the operation server and supplying electricity to the electric vehicle; And a communication server providing a communication environment between the operation server and each charger, wherein the communication server communicates with the operation server in a first communication protocol, and with each charger a second communication protocol. Communicate with

The electric vehicle charging system may further include an intermediate server that collects information about a charger of a predetermined unit between the operation server and the charger and transmits the collected information to the operation server by using a request / response protocol. .

The first communication protocol and the second communication protocol may use any one of TCP / IP and CDMA.

In addition, the electric vehicle charging system, the electric power grid to produce or / and supply electricity under the control of the operation server, including at least one power carrier having its own power transmission, substation and power distribution facilities to supply the power to the charger In addition, the power grid may support a smart grid (smart grid).

The charger may include: a converter for converting input AC power into DC power; An inverter for converting the converted DC power into AC power; A transformer for transforming the inverted AC power; And a rectifier for rectifying the transformed AC power to generate DC electricity.

An example of a communication method in an electric vehicle charging system according to the present invention includes the steps of receiving information of an electric vehicle user; Delivering the received user information to an operating system to perform a corresponding user authentication; Receiving information for charging an electric vehicle from a user; And performing charging of the electric vehicle in the charger based on the received information.

Here, the charger may download basic information for performing charging in advance from the operating system before performing the charging.

The basic information downloading process may include: authenticating the charger in an operating system and transferring the result to the charger; Transmitting a response message confirming the result delivered from the charger to the operating system; Transmitting version information on its basic information from the charger to the operating system; Determining whether the version information received from the operating system is the latest version, and transmitting a message to download the basic information of the latest version from the charger as a result of the determination; And downloading and updating basic information of the latest version according to the message from the charger.

The version information may include at least one of version information on existing unit price fee information, version information on a program, and version information of a module in a charger.

The basic information may include at least one of information on charging station operation, information on a basic unit price fee, information on a charger operating parameter, and information on an encryption key value.

Also, the received electric vehicle user information may be collected by recognizing an ID card tag of a pre-registered user.

The charger may output guide text and / or voice related to the authentication failure when the authentication fails.

The request / response between the operating system and the charger may be in the form of a packet, and the packet may include start information indicating the start of the packet, header information, data information, checksum information, and end information indicating the end of the packet. can do.

The header information may include at least one of information on a transmission date of a corresponding packet, corresponding packet sequence number information, machine type information for classifying an EV charger, charging station ID information, physical equipment number information of the charger, and indication identifier information. It may include one or more.

In addition, the machine type may include an entire equipment, a quick charger, a slow charger, a contactless charger, a slow charger for a motorcycle, and a quick charger for a motorcycle.

The data information may include at least one of information on a machine mode, information on a machine state, and additional information.

One example of a payment system according to the present invention, the charger connected to the electric vehicle to collect the payment information of the electric vehicle to the operating system and charging the electric vehicle under the control of the operating system; An operating system which determines a payment amount based on a supply unit price based on the payment information, transmits the determined payment amount and payment information to a payment server, receives a transaction history of payment completed by the payment server, and delivers the transaction details to a charger; And a payment server that performs a payment based on the payment amount and the payment information transmitted from the operating system and delivers the result to the operating system.

One example of a reservation method in an electric vehicle charging system according to the present invention includes the steps of accessing a web page of an electric vehicle operating system through a terminal; Selecting a particular charging station from a connected web page; Selecting and reserving at least one charger in the selected charging station; And transmitting reservation information to a corresponding charging station, and performing a reservation procedure based on the reservation information transmitted from the charging station.

Here, the charging station determines whether the reservation of the charger is duplicated based on the reservation information, and if the determination result is duplicated, the charging station notifies the user that the reservation time is duplicated and cannot be used through the operating system or directly to the user. It can provide information about other chargers, charging stations, and other times when possible.

The terminal may provide its own location information and receive information about a charging station at a location closest to the current user's location from the operating system.

The information may include at least one of map information, GPS information, charging unit price information of each charging station, and current usage status information of the charger in each charging station so that the terminal user can find the corresponding charging station at the current location. .

The operating system or the charging station may request confirmation of the information on the reservation fact in advance from the reservation time to the reserved terminal and provide an alarm.

In addition, the operating system or the charging station may provide information on whether charging is possible, including an emergency situation or other situation occurring at the charging station in relation to the scheduled time.

The operating system or the charging station may delete and update the reservation information for the charger of the corresponding charging station when there is no response or when the user cancels the reservation process when the alarm about the reserved information is received from the terminal.

In addition, the operating system or the charging station may provide information on the unit price of electricity supply to the terminal, collect information on the amount of charge and other information from the user to perform a reservation payment procedure in advance.

In addition, the operating system or the charging station may perform a payment procedure by communicating with a payment server through a request / response on whether to perform a payment procedure through a pre-registered payment means.

In addition, the operating system or the charging station may provide additional information including at least one of address information, location information, and map information of the relevant electric charging station based on the location information of the terminal reserved or at the request of the terminal. .

According to the present invention,

First, there is an effect to provide an electric vehicle charging system for charging the battery of the electric vehicle.

Second, the communication protocol required for the electric vehicle charging system is effective to increase the efficiency of management and its operation.

Third, it is possible to facilitate the user's convenience of using the electric vehicle charging system by enabling the reservation and reservation payment.

1 is a view showing an example of an electric vehicle charging system according to the present invention,
2 is a view illustrating in more detail the flow of information in the electric vehicle charging system according to the present invention,
3 is a view showing a detailed configuration of a charger according to the present invention,
4 is a flowchart illustrating an example of a power supply process in an electric vehicle charging system according to the present invention;
FIG. 5 is a flowchart illustrating an example of a detailed charging process between the charging unit and the electric vehicle in FIG. 4;
6 is a view illustrating an example of an overall communication flow in an electric vehicle charging system according to the present invention;
7 is a diagram illustrating an example of a configuration of an electric vehicle driving information system according to the present invention;
8 is a view illustrating an overall communication flow in an electric vehicle charging system according to the present invention;
9 is a view illustrating an example of a communication flow in a charger installation process according to the present invention;
10 is a diagram illustrating an example of a packet format to be transmitted to a charger in an operating system according to the present invention;
11 illustrates an example of a packet format transmitted from a charger to an operating system according to the present invention;
12 is a view illustrating an example of a communication protocol when the charger is powered on according to the present invention;
FIG. 13 is a diagram illustrating an example of a communication protocol in a corresponding process when a customer requests charging in the standby operation state of FIG. 12; FIG.
FIG. 14 is a view illustrating another example of a communication protocol in a corresponding process when a customer requests charging in the standby operation state of FIG. 12; FIG.
15 is a view showing an example of a payment system according to the present invention, and
16 is a flowchart illustrating an example of a reservation method according to the present invention.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. Rather, the intention is not to limit the invention to the particular forms disclosed, but rather, the invention includes all modifications, equivalents and substitutions that are consistent with the spirit of the invention as defined by the claims.

The present invention relates to an electric vehicle (EV) charging system and a communication method thereof, and in particular, in the present specification, an electric vehicle charging system for charging an electric vehicle and data processing, management, and operation of the electric vehicle charging system. The communication method for the above will be described.

To this end, in the present specification, by defining the communication protocol of the electric vehicle charging system according to the present invention, through the diversification and advancement of the infrastructure related to electric vehicle charging to increase the efficiency of the information system of the charging infrastructure, operating system when building the charging system In the field of communication between the charger and the charger, we will lay the foundation for technical universality and compatibility. In addition, through this, we will lay the foundation for the development of related industries and promote the convenience of customers to cope with future changes in charging environment.

Hereinafter, in the present specification, the “electric vehicle (EV)” is a concept including all means of transportation or driving means driven by using electric energy, and is not a concept that is limited to the number or form of wheels. In other words, the electric vehicle according to the present invention includes not only four wheels but also two wheels and three wheels. However, hereinafter, the present invention will be mainly described as an example of a four-wheeled electric vehicle for the sake of understanding and convenience of description. However, the present invention is not limited to the examples described below according to the concept of the electric vehicle as described above.

In addition, the term "charging" refers to a process of supplying power to a battery of an electric vehicle so that the electric vehicle can be driven. The term "charging" refers to a fast charging, a slow charging, Although classified as contactless charging or the like, the charging concept in the present invention is applicable to all of the above classifications.

In addition, the basic content of the communication protocol defined in the present specification is to be acceptable to all chargers regardless of charger manufacturer, charger type, etc. That is, to secure the versatility of the charging infrastructure information system, data encryption, tampering and hacking prevention Securing security through the use of algorithms, securing the reliability by establishing a safe system through a system that enables electric vehicle holders to receive desired services anytime and anywhere, that is, user-oriented protocols and countermeasures in the event of a failure related to the operation of the charger. It is to provide a standardized and unified system for the construction and reliability of future-oriented systems that can more actively cope with the expansion of business areas such as related supplementary services, etc., to improve reliability, ease of maintenance, universality, scalability, and economics. .

In addition, the technical idea of the present invention will be described as an embodiment of the charging system of the electric vehicle, but the related information is not limited to the charging system of the electric vehicle, but may be applicable to the related art. Therefore, it is obvious that the scope of the present invention can also be applied to the same or other technical field charging systems that can (inferentially) apply or apply the same or similar principles as the claims and the technical idea of the present invention described herein. will be.

Hereinafter, with reference to the accompanying drawings, first, an electric vehicle charging system according to the present invention will be described.

As an example, in the present specification, a method for constructing an electric vehicle charging system without providing facilities such as a transmission network, a distribution network, and a substation will be described.

In addition, the present specification is to provide an electric vehicle charging system that provides a more stable and low-cost power in response to the power demand in real time through the expansion of various power grids and linkage with smart-grid.

1 is a view showing an example of an electric vehicle charging system according to the present invention.

In FIG. 1, for convenience of description, the flow of power (power line, solid line) and the flow of data (communication line, dashed line) are divided and displayed.

An example of an electric vehicle charging system according to the present invention is largely composed of a power supply unit and a charging unit 130. In this case, the electricity produced / supplied by the power supply unit is charged and supplied to the electric vehicle 140 via the charging unit 130, and the electric vehicle 140 charges the battery with the supplied electric power to operate it as a power.

Here, the “power supply unit” includes a grid, such as a power corporation that produces and supplies electricity, and means for producing or / and supplying electricity in addition to the grid, and includes a power network. Used.

The power supply unit may be described in a sense including a management server for controlling the electric power grid in some cases. In other words, in connection with the present invention, the power supply unit is used to mean all power supply means or / and control means thereof capable of supplying electricity to the charging unit 130.

Therefore, according to the present invention, the power supply unit may be configured to include a power grid for supplying power and a first management server for controlling the power grid, the charging unit converts and transforms the power supplied from the power grid electric vehicle 140 It may be configured to include a second management server to communicate with the charger 133 and the power supply for charging. In the above, the first management server will be described with reference to the central management server system 120 to be described later, and the second management server as a local server (132) to be described later as an example.

As described above, the power grid 110 is a system, operators having at least one or more of their own power transmission, substation and distribution facilities required to supply electricity, produced and supplied primarily in the system to railroads or urban railways, etc., Small Hydropower, PhotoVoltaic (PV), Solar Thermal, Wind Power, Waste Energy, Bio Energy, Geo Thermal, Marine Energy ( At least one of the renewable energy processing system for supplying electricity generated from renewable energy, such as Ocean Energy).

In addition, the electric vehicle charging system according to the present invention, a smart-grid (intelligent smart grid) means a next generation power system and its management system implemented through the convergence or complex of modernized power technology and information and communication technology, which are emerging recently. Can be linked to and / or supported.

However, hereinafter, in the present specification, for the convenience of explanation and for convenience of description, 2 such as urban railway works that supply electric power to railways and urban railways using electric power produced and supplied by primary power providers, which mean grids. An example of using a car power carrier as a power grid is described, but is not limited thereto.

In general, high-flowing areas are not easy to build an infrastructure that provides high pressure enough to charge electric vehicles because of the danger. However, even if such infrastructure is established, efficiency is inferior in economic and non-economic aspects with regard to the configuration of the charging system, such as drawing a separate power line from a column transformer.

Therefore, the present specification has an infrastructure capable of providing a high enough pressure to be used for charging the electric vehicle, and can be installed in a region with a large population of people to charge a second electric power company to implement an effective model It is an example of a model used as one of the power grids of a system. According to this, not only can the electric vehicle charging system be configured more simply and economically, but also the efficiency can be improved.

In addition, the present invention may use a power supply means connected to each power supply means in addition to the above-described model and supplying virtually cheap power at a corresponding time period based on a smart-grid environment as the power grid 110. have.

Hereinafter, the function or role of each component of the electric vehicle charging system will be described in more detail with reference to FIG. 1.

The central management server system 120 controls the overall power processing of the power grid 110. In particular, the central management server system 120 may communicate with the charging unit 130 connected through the wired / wireless network 125 to control the overall supply process of electricity supplied to the electric vehicle 140. In the above, the wired / wireless network 125 may establish a Machine to Machine (M2M) platform and communicate with a communication protocol such as TCP / IP, CAN, CDMA, RS-232, RS-485, and the like. .

The central management server system 120 controls the power of the power grid 110 to be supplied to the charging unit 130 in response to the power supply request of the charging unit 130. In addition, the central management server system 120 supports or provides all the infrastructure, such as communication means necessary for the power supply process between the power grid 110 and the charging unit 130.

The charging unit 130 is a kind of charging station concept including a local server 132 communicating with the central management server system 120 and a charger 133 for supplying direct current electricity to the electric vehicle 140. Here, the charging unit 130 may further include a smart meter (131) for power supply / supply control as needed. The smart meter 131 may control the power supply related operation by providing the amount of power and billing related information supplied in the above-described smart-grid environment to the local server 132.

The local server 132 may collect necessary information between the electric power grid 110 and the electric vehicle 140 and transmit the necessary information to the power supply unit, and communicate with the power supply unit to directly control the electric vehicle charging process. The local server 132 may provide all resources or infrastructure necessary for collecting and transferring information. For example, when the charger 133 is connected to the electric vehicle 140, the local server 132 receives additional information from the electric vehicle 140. The local server 132 requests the power supply unit to supply necessary power based on the received additional information. In the above information, the additional information may include billing information, and the local server 132 directly calculates the billing information received from the electric vehicle 140 based on the smart meter 131 information and calculates a charge relative to the amount of power supply. Or if necessary, through the central management server system 120 or directly to the external server 150, the billing information can be transmitted, and the relevant information can be output. In the above, the external server 150 may include, for example, a linked agency such as the Environmental Management Corporation, the Road Traffic Corporation, the National Tax Service, or a server of the linked agency.

The charger 133 includes a connector (not shown) that is directly connected to an innet provided in the electric vehicle 140 to supply power. The charger 133 collects the information of the electric vehicle 140 through the internet connected to the connector, transmits the information to the local server 132, and transmits the electric power received through the electric power grid 110 based on the transmitted information. Supply to 140 to charge the battery (not shown) of the electric vehicle. In the above, the Internet and the connector are also referred to as a coupler. In connection with the present invention, a more detailed description of the charging process between the charging unit 130 and the electric vehicle 140 will be described later.

2 is a view illustrating in more detail an example of the flow of information in the electric vehicle charging system according to the present invention.

Referring to FIG. 2, only the central management server system 210, the charger 220, and the electric vehicle 240 are illustrated for convenience of description of the information flow in the electric vehicle charging system. The charger 220 may be a concept of a charging station in some cases.

The central management server system 210 includes a control unit 212, a converter 214, and a display unit 216, 218.

The charger 220 includes a first controller 222, a second controller 224, a display unit 226, a card reader 228, and a charger 230.

The electric vehicle 240 includes a battery (not shown) and a battery management system (BMS) 242.

For convenience, the flow of information in the electric vehicle charging system will be described by taking one usage scenario related to the electric vehicle charging process as an example.

When the electric vehicle 240 and the charger 220 are connected to each other, the charger 220 is activated. Here, the activation refers to, for example, the owner of the electric vehicle 240, that is, when the user inputs information for charging through a user interface (UI) provided by the charger 220, the charger 220 ) To recognize it and to prepare for charging. In other words, it means a state in which the charger 220 can perform a process necessary for charging the electric vehicle 240.

As described above, the display 226 of the charger 220 provides information necessary for the user of the electric vehicle 240 and provides a user interface (UI) for inputting charging related information of the user.

In addition, the first control unit 222 of the charger 220 communicates with the battery management system (BMS) 242 of the electric vehicle according to a predetermined protocol and collects battery related information. The collection of this information can be done, for example, through the connectors of the charger and the specific terminals included in the internet of the electric vehicle.

Here, the connector of the charger 220 and the internet of the electric vehicle 240 may be provided with a plurality of terminals as determined by the relevant standards. For example, the connector of the charger 220 basically includes an electric supply terminal for supplying electricity to the electric vehicle 240, and may further include an additional terminal for receiving and supplying a signal necessary for a charging process. Such additional terminals include, for example, a ground terminal, a charge start / stop terminal, a connection check terminal, and a CAN area controller. Can be. CAN communication is a kind of communication protocol for transmitting and receiving data through parallel connection between devices.

Here, the battery-related information collected by the first control unit 222, for example, the current remaining amount of the battery, the required charge amount, the rated voltage and current of the battery, and all that can be provided in the electric vehicle 240 in connection with the battery charging Contains information. In this case, the first control unit 222 and the battery management system (BMS) 242 of the electric vehicle may communicate using, for example, a CAN communication protocol.

The first control unit 222 transmits the battery related information collected by communicating with the battery management system (BMS) 242 of the electric vehicle to at least one of the control unit 212 and the second control unit 224 of the central management server system. . At this time, the first control unit 222 may use the M2M method to communicate with the control unit 212 and the second control unit 224 of the central management server system, and the communication protocol is TCP / IP, CAN, CDMA, RS -232, RS-485 type can be used.

The second control unit 224 receives the user's input information through the display 226 and the card reader 228, for example, the transaction history information such as the degree of supply requested power, card information, billing, payment, etc. The card information, the power supply, that is, the information about the state of charge, etc. are received from the control unit 212 of the central management server system and transmitted to the display unit 226 or the card reader 228. Can be.

For example, the second control unit 224 may include at least one communication protocol among each charger and a public switched telephone network (PSTN), an internet protocol suite, and a wireless local area network. Transmit and receive information of the electric vehicle connected to the charger using the above, the Internet Protocol Suite may include at least one of a serial communication method and an Ethernet communication method including RS-232 and RS-485.

In addition, the second controller 224 may communicate between the display 226 and the card reader using an RS-232 communication protocol. In addition, the second control unit 224 may be connected by the RS-485 communication protocol between the charger 220 and the central management server system 210, and may be internally connected by the RS-232 communication protocol, within the central management server system The converter 214 may be converted from the RS-485 to the RS-232 communication protocol to transmit information to the control unit 212 of the central management server system.

The transmitted information may be output from the first display 216 and the second display 218 in the control unit 212 of the central management server system. In this case, the first display 216 may display information related to the electric vehicle charger, such as the card information, the state of charge of the electric vehicle, the available state of the charging system. In addition, the second display 218 may display information related to the battery management system, such as a battery remaining amount of the electric vehicle, a transmission voltage charging current.

As described above, through the information exchange between the central management server system 210, the charger 220 and the electric vehicle 240, the first control unit 222 of the charger finally controls the charger 230 to control the electric vehicle Control the power supplied to.

Hereinafter, a detailed configuration of the charging unit 130 according to the present invention.

3 is a view showing an example of a detailed configuration of the charger 133 according to the present invention.

The charger 133 receives the AC power of the electric power grid 310, converts it into DC electricity, and supplies the same to the electric vehicle 340.

Referring to FIG. 3, the charger 133 according to the present invention includes a converter 326, an inverter 328, a transformer 330, a rectifier 332, and an earth leakage detector. (324,334).

The first ground fault detector 324 inspects whether a ground fault occurs while AC power is supplied to the charger 133 through the power grid 310. Here, when a short circuit is detected as a result of the test, the first ground fault detector 324 controls and processes the AC power not to be supplied from the power grid 310 to the charger 133 by using a relay or the like.

The converter 326 converts AC power supplied from the electric power grid 110 to DC power.

The inverter 328 inverts the DC power converted in the converter 326 back to the AC power.

The transformer 330 electrically insulates the electric power grid 310 and the electric vehicle 340, and converts the inverted AC power input to a voltage necessary for charging the electric vehicle.

The rectifier 332 rectifies the transformed AC power to generate desired DC electricity.

The converter 326, the inverter 328, and the transformer 330 described above are used to adjust the difference in the power supply / supply scheme between the power grid 310 and the charger 133. May be added.

The second ground fault detector 334 checks whether a ground fault occurs while DC electricity rectified by the rectifier 332 is supplied to the electric vehicle 340. Here, the second ground fault detector 334 detects a ground fault as a result of the detection, and similarly to the first ground fault detector 324 described above, the DC electricity of the charger 133 no longer uses the configuration of the relay or the like. ) So that it is not supplied.

In the above, the first ground fault detector 324 and the second ground fault detector 334 use a relay to cut off power between the power grid 310, the charger 133, and the charger 133 and the electric vehicle 340, respectively. Illustrated.

Each ground fault detector is connected between each resistor connected to ground, each resistor and a link stage for supplying power to the load, and a decompression unit for reducing the input high voltage, an adder for obtaining a gain between the link stage and the ground, and the addition. It may be configured to include a control unit for determining whether a short circuit from the negative gain.

However, this is only one embodiment according to the present invention, the scope of the present invention is not limited to the above-described examples, it is possible to use a variety of means capable of electrically connecting and disconnecting two or more components to each other, including the relay.

4 is a flowchart illustrating an example of a power supply process in an electric vehicle charging system according to the present invention.

In FIG. 4, it is assumed that an urban railway power grid is used as the power grid. That is, the power is supplied through the power grid of the primary power provider to secure its own power grid (S410).

The metro grid is linked with the electric vehicle charging system, and allocates the surplus power of the electric grid for use in the electric vehicle charging system.

Thereafter, the electric vehicle charger determines whether a power supply request for charging the electric vehicle is received (S420). As a result of the determination in step S420, if the power supply request for charging the electric vehicle has not yet been received, it continues to wait. However, if it is determined in step S420 that the electric power supply request for charging the electric vehicle is received from the charger, charging is performed by communication between the electric vehicle and the charger (S430).

After performing the step S430 or afterwards, payment is performed in the local server based on the power usage and billing information (S440). Here, for example, the payment may be delivered to the central management server system and processed together with the management information.

5 is a flowchart illustrating an example of a detailed charging process between the charging unit 130 and the electric vehicle 140 in FIG. 4.

Referring to Figure 5, the charging process in more detail, as follows.

An example of a charging process between the charger 133 and the electric vehicle 140 will be described below. However, hereinafter, the description of the power supply process from the power grid 110 to the charging unit 130 refers to the above description, and the detailed description thereof will be omitted.

The charging process between the charger 133 and the electric vehicle 140 is started by the combination of the charger 133 and the electric vehicle 140. In other words, the charging process is started while the two devices are connected (S510) by the combination of the connector of the charger 133 and the internet of the electric vehicle 140.

In operation S510, when the connector of the charger 133 is connected to the internet of the electric vehicle 140, the charger 133 and the electric vehicle 140 recognize each other (S520 and S530). That is, the connector of the charger 133 and the internet of the electric vehicle 140 may recognize the connection of each other using identification information included in signals transmitted and received through signal terminals.

When the charger 133 and the electric vehicle 140 are recognized through the steps S520 to S530, before the start of the actual charging process, the state of the charger 133, for example, is there any abnormality in the charger 133 according to the present invention? That is, it is determined whether there is a risk of leakage (S540).

If a short circuit is not properly checked, and the high voltage electricity is supplied from the electric power grid 110 to the electric vehicle 140 via the charger 133, there is a risk of burnout of human or electric vehicles due to the short circuit. Therefore, in order to prevent such a problem in advance, confirmation of a short circuit before power supply to the electric vehicle 140 should be prioritized. In this regard, the charger 133 may detect a short circuit by using a test voltage generated by itself.

In step S540, if the leakage check result, if there is no risk of leakage in the charger, the charger 133 determines that the safe charging process for supplying power to the electric vehicle 140, that is, the charging process is allowed. The charger makes a safety declaration (S550).

In step S550, when the charger safety declaration is made, the charger 133 now allows the electric power received from the electric power grid 110 to be supplied to the electric vehicle 140 (S560), and performs a charging command (S570). This charge command can be substituted by passing the voltage and current command values.

The charger 133 generates the voltage and current command values transmitted to the electric vehicle 140 to supply DC electricity to charge the battery of the electric vehicle 140 (S580). In addition, when a short circuit is detected after the start of charging, charging should be stopped immediately.

Therefore, according to the present invention, the electric vehicle charging system for electric charging can be completely implemented in the battery of the electric vehicle, and by minimizing the addition of unnecessary components by connecting with its own power grid, the efficiency of the charging system is increased, It can also be linked with smart-grids to react in real time to power conditions.

As described above, the electric vehicle charging system according to the present invention may be applied to a charging related system of the same or another field, such as a power generation facility, in addition to the charging of an electric vehicle.

In addition, the present invention, as described above, for example, when constructing an electric charging station system in connection with the secondary power operator in one power grid, there are the following advantages.

First of all, in terms of users, a) the convenience of access by being located in congested areas or downtown areas in urban centers due to the nature of urban railway history, b) the availability of urban railroads on congested roads, and reduced transit time by reducing associated transportation waiting times, c) urban There is an advantage of reducing the environmental pollution by reducing the operating cost of the electric vehicle according to the location, and d) environmental pollution through the reduction of fossil fuel use.

In terms of electric vehicle charging station operators, a) the installation of transit parking lots is easy to install according to the use of existing public institution land, so that the installation of charging stations in urban areas is easy, and b) at least the land compensation cost of construction costs (construction cost, supplementary cost, land compensation cost) Reduction of construction costs by using the existing railway transport parking lot of the existing facilities, and c) sharing of urban railways and management costs (communication facilities, substation facilities / others) has the advantages of reducing operation and maintenance costs.

In addition, on the national level, a) reduction of CO2 emissions from additional construction, b) spread of electric vehicles, c) rapid implementation of policies (public institutions), d) provision of BIZ Models for urban railways and electric vehicles, e) relieve some of the urban traffic shortages, f) improve the cost of sharing of public transportation, g) improve access to central areas, and h) provide flexible services for changing demands and branch lines.

Next, the communication protocol defined for data processing, management and operation of the electric vehicle charging system according to the present invention will be described in detail.

6 is a view illustrating an example of the overall communication flow in the electric vehicle charging system according to the present invention.

Referring to FIG. 6, the charging system may include an operation server 610, a communication server 620, and a charger 740.

The operation server 610 may include an electric vehicle driving information system, a charger operation management system, and a database management system (DBMS), which is a set of software tools that allow a plurality of users to access data in a database. have. In this case, the electric vehicle driving information system or / and the charger operation management system may be built on a web-based (web-based). In addition, the information collected from the electric vehicle driving information system and the charger operation management system can be transmitted to the database management system, and if necessary, read and used for management and operation.

In addition, there is a communication server 620 providing a necessary communication environment between the operation server 610 and the charger 740. The communication server 620 may be configured as an M2M platform that remotely manages devices by connecting them to a communication network. In addition, the communication server 620 may use TCP / IP, CAN, CDMA, RS-232, RS-485 communication, and the like for communication with the operation server 610 and the charger 740. In addition, the communication server may use the same communication protocol between the operation server 610 and the charger 740, but may also use different communication protocols. However, this communication protocol is an example for helping understanding of the present invention, and the present invention is not limited thereto. In other words, the present invention may use next-generation communication technologies such as, for example, Long Term Evolution (LTE), which provide a stable and faster communication environment through technology development, as a communication protocol for the present invention.

7 is a diagram illustrating an example of a configuration of an electric vehicle driving information system according to the present invention.

Referring to FIG. 7, such an electric vehicle driving information system may make it easier for an operator to operate codes, reports, and customer management through a web page, for example, by implementing functions in an operator management application on a web-based web page. It is to make it possible.

In addition, by reinforcing the report-related function on the web page, the function of printing the usage and billing history by smart card can be added. have.

The electric vehicle driving information system of the present invention includes, for example, a charger 710, a communication module 720, a database (DB) processing module 730, and an area of a web page 740 for customer service. do.

In other words, information about the customer and the electric vehicle collected by the charger 710 is transmitted to the communication module 720, the communication module 720 transmits it to the database processing module 730.

The database processing module 730 records charger status information, customer information, code information, vehicle information, charger information, and the like on the web page 740 of the operator.

The web page 740 uses the recorded information for management and operation.

8 is a view illustrating the overall communication flow in the electric vehicle charging system according to the present invention.

The communication flow in the EV charging system may have a hierarchical structure.

Basically, there is an electric charging station in the lower layer, and in the upper layer, there may be a server that finally collects, manages, controls, and processes information of each charging station.

Referring to FIG. 8, the hierarchical structure will be described as an electric charging station (n, n + 1, ..., n + m and k, k + 1, ..., k + l) as the lowest layer, and the second server 820 as the next higher layer. Finally, the first server 810 may exist as the highest layer.

In FIG. 8, a second server exists in the form of an intermediate server between the charging station and the first server 810 of the highest layer. However, this is to help the understanding of the present invention and for convenience of description. In some cases, the second servers 820 and 825 may not exist, and on the contrary, a larger number of second servers may exist. In addition, a third server and a fourth server may further exist in the form of an intermediate server such as a second server.

Here, the charging station may be, for example, the charger 133 of FIG. 1 or the local server 132 communicating with each charger in the charging station.

The second server 820 and 825 communicate with a charging station in a predetermined range as an intermediate server to collect information of the charging station or transmit a control command of the first server 810 to the charging station. Here, the second servers 820 and 825 may be divided into regional units, time units, and the like, and may be plural. In addition, each of the second servers may prevent an overload of a specific server by exchanging information with each other.

The first server 810 may receive information of each charging station collected by the intermediate server or transmit a specific control command through the intermediate server based on the information of each charging station.

In the above, information exchange between the first server 810, the second server 820, 825, and the charging station may be performed in a predetermined time unit, or any one of a polling method and a real time method. It may be used or a combination of each of the above manner. Alternatively, the information exchange method between the first server 810, the second server 820, 825, the second server 820, 825, and the charging station may be different from each other.

9 is a view illustrating an example of a communication flow in a charger installation process according to the present invention.

The communication protocol according to the present invention basically has a request / response process.

In a normal case, when one side of the transmitting and receiving end makes a request, the other side responds to the request. When a predetermined time elapses after receiving a response from the other side, one side transmits a confirmation message indicating that the response is normally received. Here, the predetermined time may be 30 seconds. However, the present invention is not limited thereto.

Unlike the above, in the abnormal case, it is necessary to prescribe the processing in consideration of the efficiency of the system and the like. The abnormal case may include, for example, a case in which a response is not received or a case in which an acknowledgment message according to the response is not received.

First, when the former is described, one side makes a first re-request to the other side if there is no response to the first request from the other side as a result of waiting for the first predetermined time for the first request. If one side does not respond within the second predetermined time from the other side after the first re-request, the second side requests the second side again. If there is no response within the third predetermined time from the other side after the second re-request, the one side may determine that there is a problem with the communication with the other side, and may disconnect the communication with the other side.

Next, the latter will be described. In the normal case, as described above, when a response from the other side is received in response to a request from one side, the one side transmits a confirmation message after a predetermined time elapses. However, abnormally, one side may not transmit an acknowledgment message despite the other side's response. For example, if the acknowledgment message corresponding to the response from the one side is not received from the other side within the first predetermined time, the first re-response is performed. The other side transmits a second re-answer if the acknowledgment message is still not received from the one side within a second predetermined time after the first re-response. If the other side does not receive the confirmation message for the second re-response from the one side within the third predetermined time, it determines that there is a problem with communication with the one side, and disconnects the communication with the one side.

In the above example, but re-request twice for one request, but is not limited to the number described above can be determined according to the promise between the transmitting and receiving end.

In addition, the first predetermined time to the third predetermined time may all mean the same time, or conversely, all may mean different times, or the second predetermined time and the third predetermined time may be the same, but the first predetermined time may be the same. It can also be set shorter than time. This may also be determined by an appointment between the transmitting and receiving end.

Referring to FIG. 9, the operating system 910 may be, for example, at least one of the first server 810 or the second server 820, 825 of FIG. 8.

When the charger 920 is installed in the charging station, the charger 920 may identify an identifier (charging station ID), its own ID (charging machine ID), a port number and an IP address (port number & internet protocol (IP) for communication. The charger installation information including the address), GPS (Global Positioning System) coordinate information, etc. is transmitted to the operating system 910 (S902). In this case, the installation information of the charger may be manually input and stored, and may be transmitted to the operating system 910 at the request of the operating system 910 or after the input and storage of the information according to a predetermined requirement. . For example, the GPS location information may be provided by the installation company when installing the charger.

When the operating system 910 receives the charger installation information from the charger 920 in operation S902, the operating system 910 transmits an acknowledgment / ACK message thereof (S904). In operation S904, when the charger installation information is confirmed by the operating system 910, the charger is decoded to register the ID of the charging station to which the charger belongs, the type of the charger, the port number, the IP address, the charger manufacturer, the charger ID, and the like.

Alternatively, the operating system 910 decodes the installation information received from the charger 920, and checks the installation information, such as charging station ID and charger ID, compared with the registered installation information, etc. (ACK / NAK Message) can also be sent to the charger.

When the charger 920 receives a confirmation message corresponding to transmission of installation information from the operating system 910, the charger 920 recognizes that the installation is normal and ends the installation process. However, if the check result from the installation information of the charger 920 in the operating system 910 in the above-described process, an error message is transmitted to the charger or the charging station including the charger. The charger or charging station checks the installation information again according to the error message, and if there is a problem, configures the installation information again after a reset and repeats the above-described process.

Chargers at each charging station request a basic information file when installation is complete. Here, the basic information file includes, for example, at least one or more of basic unit price information, operation parameter information, encryption key information, and the like.

When the charger 920 transmits the encryption key to the basic information file from the operating system 910, the charger 920 may receive the encryption key and store it in the memory. This data is then transmitted to the operating system 910 after encrypting the data using an encryption key, for example, using an encryption algorithm, and the operating system 910 also transmits after encrypting the data with the same key. The charger 920 may decrypt. Here, the encryption algorithm is one example of triple DES, but the present invention is not limited thereto, and various encryption algorithms may be used. In addition, such an encryption algorithm may be extended or changed to a standardized encryption algorithm according to future technology development. That is, the encryption key is used to encrypt and decrypt data between the operating system 910 and the charger 920.

In other words, the charger 920 sequentially requests the basic information file to the operating system 910 after the installation is completed. 9, a basic information file request process is performed between the charger 920 and the operating system 910. First, when the basic unit price information is requested from the charger 920 (S906), the operating system 910 is performed. The full text including the response to the request is transmitted (S908). The charger 920 then decodes and stores the full text of the operating system 910. The charger 920 requests the operating parameters to the operating system 910 (S910), and the operating system 910 transmits a response message including the requested operating parameters in operation S910 (S912). The charger 920 decodes and stores the full response of the operating system 910 in operation S912. The charger 920 requests the information on the encryption key (S914), and the operating system 910 transmits the full response in response to the request of the charger 920 in step S914 (S916). The charger 920 decodes and stores the full response of step S916 of the operating system 910.

Through the above-described process, the charger 920 is terminated installation and is powered on to supply power to the electric vehicle. In this case, the charger 920 may be an approval process for confirming whether there is an abnormality of the charger and implementing a function as a final charger from the operating system through the power-on operation.

10 is a diagram illustrating an example of a packet format transmitted to a charger in an operating system according to the present invention.

The packet format according to the present invention includes a protocol control code, a header area, a data area, and a cyclic redundancy check (CRC) area. The protocol control code may include, for example, an STX (Start of Text) in front of the header area and an ETX (End of Text) behind the CRC area.

Referring to FIG. 10, the packet format will be described in more detail as follows.

As one of the protocol control codes, STX indicates the start of the packet and ETX indicates the end of the packet.

The header area may be the same format for transmission and reception in a part common to each packet in consideration of program development convenience. This header area may include, for example, send date data, sequence number (SNO) data, machine type data, charging station ID data, charger ID data, and instruction identifier (INS). , And at least one of Message Length (ML) data.

The transmission date data is data on the date when the packet is transmitted, and the representation format of the date may have a format of, for example, year-month-date-hour-minute-second (YYYYMMDD hhmmss). However, the expression format may be a unique format according to the country or region.

The sequence number (SNO) data is for synchronization of the transmission and reception side with respect to the transmitted packet. For example, when the transmission side transmits the sequence number as 1, the reception side also responds with the sequence number as 1 to the transmission and reception side. You can distinguish packets by synchronizing numerous packets. This performs the same function as a packet identifier (PID). In addition, the sequence number may be avoided in advance in the following process, for example, by increasing it by one.

Machine type data is used for the purpose of distinguishing a type of charger. For example, the machine type includes an entire equipment, a quick charger, a slow charger, a contactless charger, a slow charger for a motorcycle, a quick charger for a motorcycle, and the like, which may be divided into predetermined values for each machine type.

The charging station ID literally means an identifier for identifying the charging station. Here, the charging station ID may have a format such as, for example, two major classification, two minor classification, and two minor classification.

The charger ID refers to an identifier for identifying the charger, and may be represented, for example, by the physical equipment number of the charger. Alternatively, the charger ID may have a value indicating the number of chargers of a specific charging station by mapping with the charging station ID described above.

The instruction code (INS) data is basically an identifier for distinguishing the type of data transmitted and received between the operating system and the charger. The identifier may be a predetermined value.

For example, if the identifier is UA, user authentication, if ST, send device status, if SR, request equipment status, download OD operation information if OD, charger mode for MR, charger mode change for MC, request for re-receive data if DR, VR To request version information, UD to download basic unit price information, PR to charge station operation unit price request, RQ to request charger reset, TR to request closing data, VD to download charger voice information, LD to download charger text information, and PD to download charger program , If the MD downloads the charger module application, the ID downloads the charger image, the LR requests the charger log, the AR requests the alarm data, the SR requests the charging start, the CS requests the charging progress, the CR completes the charging, the KD downloads the encryption key, UR sends unplugged, downloads OR charger operating parameters, AT sends charger authentication results, GT indicates GPS leftover transmission and SI indicates charger installation information.

The transmission data length data indicates the length of data transmitted through the corresponding packet. The size of the request / response buffer for this can be promised to have a minimum of 1024 bytes, for example.

Next, the data area is an area that includes actual data of variable size, and includes a data field or a result data field required to perform a business code function.

Finally, the CRC area includes a check code used for error correction up to the header area and the data area. Here, the check code may be, for example, a CRC-16 checksum, but is not limited to the above example. Various checksums may be used.

11 is a diagram illustrating an example of a packet format transmitted from a charger to an operating system according to the present invention.

An example of a packet format according to the present invention basically corresponds to the packet format of FIG. 10 described above.

Therefore, the overlapped portion of the packet format transmitted from the charger of FIG. 11 to the operating system, that is, the packet format of FIG. 11 is almost the same except for the data region of the packet format of FIG. 10. The description employs the foregoing, and hereinafter, the description focuses on different data area portions.

The data area will be described in more detail with reference to FIG. 11 as follows.

The data area further includes at least one of the machine mode and the machine state in addition to the variable data described above with reference to FIG. 10.

12 is a diagram illustrating an example of a communication protocol when the charger is powered on according to the present invention.

Referring to FIG. 12, a basic communication protocol is made between operating system 1210 and charger 1220. However, other configurations may be used in the middle as needed.

When the charger 1220 is powered on, the charger 1220 transmits an alarm message indicating that it is powered on to the operating system 1210 (S1202).

When the power-on alarm message of the charger 1220 is received, the operating system 1210 deletes all alarms for the corresponding charger displayed on the display (S1204).

The operating system 1210 transmits an acknowledgment message (ACK or NAK message) indicating that the charger 1220 recognizes the power-on state after the alarm is cleared (S1206).

In this process, the operating system 1210 may perform the authentication of the charger at the same time as the alarm is deleted, determine a confirmation message according to the authentication result and transmit it to the charger 1220. Here, if it is determined that the authentication result is a failure, the operating system 1210 may instruct to stop using the charger. Accordingly, the charger may be switched to the stop mode.

When the charger 1220 receives the confirmation message from the operating system 1210, the charger 1220 may initialize the module and perform a self-test. In this process, if there is an abnormality in the self-diagnosis result, the charger 1220 may transmit an alarm related to the abnormality to the operating system 1210 (S1208). In addition, the charger 1220 may switch to the self-suspend mode after the alarm transmission.

If there is no abnormality such as a self-diagnosis result, the charger 1220 requests version information from the operating system 1210 (S1210). Here, the version information includes, for example, version information about existing unit price fee information, version information about a program, and version information of a module in a charger. The version information may further include, for example, version information about an image, version information about a voice, version information about a text, and the like.

When the operating system 1210 receives the version information request from the charger 1220, the operating system 1210 transmits a confirmation message including the latest version information to the charger 1220 (S1212).

When the charger 1220 receives the confirmation message including the version information from the operating system 1210, the charger 1220 decodes it and compares the previously stored version information with the latest information (S1214). The charger 1220 requests to download necessary files when the received version information is newer to higher than the previously stored version information as a result of the comparison of the version information.

The charger 1220 transmits a task start alarm to the operating system 1210 after the previously stored version information is the latest version or after downloading and storing the necessary version information (S1216).

When the operation start alarm of the charger 1220 in step S1216 is transmitted, the operating system 1210 transmits a confirmation message for this (S1218). In this case, the operating system 1210 may download the basic information file to the charger 1220 or transmit the basic information file in the confirmation message. Here, the basic information file may include, for example, information on charging station operation, information on a basic unit price fee, information on a charger operating parameter, information on an encryption key value, and the like. This basic information file can be extended as additional functions are added in the future. In addition, these basic information files can be transmitted and received according to each file packet process. In addition, the operating system 1210 should be able to register and change operating parameters. When the operation start alarm is not transmitted from the charger 1220, the operating system 1210 may process a communication disconnection state with the corresponding charger.

The charger 1220 may transmit data stored in the memory (for example, charging, alarm, etc.) to the operating system 1210 and, after such data transmission, may switch to an operation standby state (S1220). , S1222).

In addition, an equipment mode may be requested and transmitted between the operating system S1218 and the charger 1220. Here, the equipment mode means, for example, a mode value currently set in the equipment, that is, the charger, and the mode value is in use, inactive, maintenance, test, card only for payment, cash only mode for payment. It contains a value indicating, etc. These mode values can be extended as the function expands in the future.

FIG. 13 is a view illustrating an example of a communication protocol in a corresponding process when a customer requests a charge in the standby operation state of FIG. 12, and FIG. 14 illustrates a charging of the customer in the standby operation state of FIG. 12. In the case of request, it is a diagram illustrating another example of a communication protocol in a corresponding process.

When the customer 1310 wants to visit the charging station and charge the battery of his electric vehicle through the specific charger 1320 of the charging station, the customer recognizes the ID card tag through the charger ( S1302). Here, as the recognition method, for example, various methods such as a method of contacting an ID card tag with a predetermined part of the charger or a method of recognizing the ID card tag with an RFID or the like in the charger may be used.

The charger 1320 requests the operating system 1330 for authentication of the corresponding customer, that is, user authentication, through the information acquired through the ID card tag of the customer 1310 (S1304).

The operating system 1330 searches the database according to the user authentication request of the charger 1320, determines whether the corresponding customer is a registered customer, and transmits a user authentication response including the determination result back to the charger 1320 (S1306). .

In this case, when the charger 1320 reads the user authentication response transmitted from the operating system 1330 and determines that the authentication has failed, the charger 1320 outputs a related announcement text and / or a voice and switches to the initial screen. At this time, for example, the request text and voice for recognizing the ID card tag or the recognition request text and voice of another ID card tag may be output on the initial screen. On the contrary, if the authentication is successful, the process proceeds to the next step (S1308).

In the next step, the charger 1320 releases the lock device of the connector, for example, coupled to the internet of the electric vehicle to supply electricity.

When the key device is released from the charger 1320, the charger and the electric vehicle may be connected to each other. And BMS information can be transmitted from the electric vehicle to the charger in a CAN communication method. In this case, the charger may provide the BMS information through a display screen. This is because it is to help the customer in determining the amount of charge (S1312).

In operation S1312, the charger 1320 receives a selection start information and a charging start command from the customer 1310 (S1314).

The charger transmits a charging start request to the operating system 1330 based on the information received in step S1314 (S1316), and if there is a charging start response in response to the transmitted charging start request (S1318), for the corresponding electric vehicle. Start charging (S1320).

In step S1320, the charger may report the charging progress state (S1322). In addition, the operating system 1330 may transmit a confirmation message in response to the charging progress report of the charger (S1324).

In operation S1322, the charger 1320 may transmit the report only when a predetermined period and / or a specific event occurs. Here, the event may be an abnormal state of connection with the electric vehicle. Alternatively, the operating system 1310 may determine a request cycle of the charging progress state, and may register and change it arbitrarily.

Further, the confirmation message of step S1324 may include a response corresponding to the request if the report includes a request including a specific control command, rather than a report of a simple progress state.

When the charging is completed after the start of charging through the S1324 step, the customer 1310 may stop the charging process by inputting a charge stop command and / or a charge completion command through a predetermined button or the like of the charger 1320 (S1326).

Of course, when the charging is completed in accordance with the charge capacity input by the customer or the charge request cost according to the charging unit price, the charger 1320 transmits that the charging is completed through the display device, and selects a selection related to the command. It may be induced.

In the above process, the operating system 1330 may send a message regarding the completion of charging to the operating system 1330 when a control command relating to stopping or terminating the charging is transmitted from the customer 1310 or the charger 1320. There is (S1328).

The operating system 1330 responds to the charging completion according to the request of the charger 1320 (ACK) (S1330), and the charger 1320 transmits the charging completion information to the customer.

At the same time, the charger 1330 transmits the unplug information to the operating system (S1332). The operating system 1330 waits for operation according to the unplug transmission of the charger 1330.

Hereinafter, referring to FIG. 14, another example of a communication protocol in a corresponding process when a customer requests charging in the standby operation state of FIG. 12 will be described.

Here, FIG. 14 refers to the above-described contents and steps that overlap with the above-described FIG. 13, and the following description will focus on differences from FIG. 13.

Basically, the difference between FIGS. 13 and 14 differs only in the flow of the charging progress state after starting charging in the chargers 1320 and 1420 in step S1322 or S1422. In other words, in FIG. 14, the charging progress status is reported from the charger 1420 to the operating system 1430 in a cycle / aperiod after the start of charging (S1426), and the operating system 1430 transmits a confirmation message thereto. (S1426). On the contrary, in FIG. 13, when the operating system 1330 requests the charging progress state from the charger 1320 (S1324), the charger 1320 responds to the charging progress state upon request (S1326). In the above, the period of the charging progress status transmission from the charger 1420 to the operating system 1430 may be, for example, depending on the value set in the operating parameter download.

15 is a diagram illustrating an example of a payment system according to the present invention.

Referring to FIG. 15, an example of the payment system of the present invention includes, for example, an operating system 1510, a charger 1520, an electric vehicle 1540, and a payment server 1530.

The payment system according to the present invention is connected to an electric vehicle, collects the payment information of the electric vehicle and delivers it to the operating system, and charges the electric vehicle according to the control of the operating system, and supplies it based on the transmitted payment information. The payment amount and payment information sent from the operating system and the operating system that determines the payment amount based on the unit price, sends the determined payment amount and payment information to the payment server, receives the transaction details of the payment completed by the payment server and passes it to the charger. It may be configured to include; a payment server for performing a payment based on and delivering the result to the operating system.

The charger 1520 is connected to the electric vehicle 1540 and collects information related to the charging amount. In addition, the charger 1520 may provide the owner of the electric vehicle 1540 with information about a basic unit price and a payment amount according to a charging amount.

To this end, the charger 1520 may previously download charging-related data from the operating system 1510 and perform a charging operation or a settlement operation on its own despite the communication failure with the operating system 1510. When the communication environment is restored in the future, the charging result and payment operation may be reported.

The charger 1520 reports the information related to the charging of the electric vehicle 1510, that is, the charging amount, the user information, the payment information, and the like to the operating system 1510, and the payment system 1540 based on the operating system 1510. The payment can be performed by communicating with.

Alternatively, as described above, the charger 1520 may communicate with the payment server 1540 to perform a payment.

Alternatively, the owner of the electric vehicle may directly access the payment server to perform the payment.

In addition, the operating system 1510 for management and the payment server (VAN) 1540 for payment are separated from each other by communication lines, for example, using two CDMA communications. However, such a communication line can be integrated into one, and in order to jump into the EV charging business in the future, when the payment system collects payment related data from the operating system 1510, data sharing through linkage with the payment server 1540 is required. .

In addition, a card or cash may be used as a payment method. In particular, when a card is used, a black list in a charger may be separately managed.

16 is a flowchart illustrating an example of a reservation method according to the present invention.

Hereinafter, a reservation method in an electric vehicle charging system according to the present invention will be described with reference to FIG. 16.

For example, when an electric vehicle charging station including at least one charger is currently located all over the country, such as a general fossil fuel filling station, users may be driven to a particular charging station if the charging stations have different electric supply prices. In this case, if the charging station waiting time is long, it may cause inconvenience to the user.

In this regard, the electric vehicle charging system according to the present invention, by establishing a web-based operating system as described above, by using the online booking system through the web-based operating system as well as offline or online booking through the charging station It can minimize the inconvenience and maximize the operating efficiency of the charging system.

As described above, when the operating system of the electric vehicle charging system is built on the web, the user can communicate at any time through not only mobile devices such as mobile phones, smart phones, tablet PCs, PDAs, but also PCs and TVs provided in homes. Access to and obtain information about charging stations and chargers to perform procedures such as reservation and payment.

Hereinafter, the present invention will be described in more detail with reference to a usage scenario for an example of a reservation method according to the present invention.

The user accesses the web page of the electric vehicle operating system through the user terminal (S1610), selects a specific charging station from the connected web page (S1620), selects and reserves at least one charger in the selected charging station ( S1630) and transmitting the reservation information to the corresponding charging station, and performing a reservation procedure based on the reservation information transmitted from the charging station (S1640).

The user accesses a web page about an operation related server or system of the electric vehicle charging system through the user terminal. In the above, the operating system collects information on the user or the user terminal or authenticates the corresponding user or the user terminal based on previously registered information.

If the above authentication is successful, the operating system provides menu items available to the user, and the user selects a particular charging station to reserve based on the provided menu items.

The user reserves one charger by referring to the current usage status and reservation status of each charger in the selected charging station.

The operating system transmits the reservation information of the user to the charging station.

The charging station performs a reservation procedure based on the transmitted reservation information.

The user performs charging in the charger of the charging station based on the reservation information.

In the above, the operating system or the charging station determines whether the corresponding charger is duplicated based on the pre-booked reservation list and the user's reservation information when the reservation procedure is performed. As a result of determining whether the operating system or the charging station is a duplicate, when the reservation of the charger is duplicated, the operating system or the charging station transmits to the user terminal that the reservation time of the charger is not duplicated. At this time, the operating system or the charging station provides the information of the reservation availability time of the charger, information on other chargers of the corresponding charging station that can be booked in the corresponding time zone, and information about other charging stations / chargers that can be reserved in the corresponding time zone, together with the notification of the unavailableness. can do. For example, the information may be provided based on the location information of the current user or the location information of the pre-reserved charging station, the lowest charging station based on the distance or the lowest charging station based on the supply base unit price as the highest. have. In the case of the charging station, offline booking is also possible. In this case, it is required to report the reservation information reserved offline at the charging station to the operating system.

Through the above process, the user can quickly and conveniently charge the electric vehicle without waiting time at a desired charging station.

In the above, the user terminal may separately download and use an application such as software or a widget from at least one of an operating system, a charging station, and a charger for convenience of performing a procedure such as access, reservation, and payment.

In the above, the user terminal may provide its location information to be recommended from the operating system the charging station information, such as the charging station of the location (most) closest to the current user's location. The charging station information may include, for example, location information of at least one charging station, navigation information from a current location of the user terminal to each charging station or a selected charging station, supply unit price information of the corresponding charging station, current usage status of each charger in the corresponding charging station, and It may include at least one or more of the reservation status information.

In addition, the operating system or the charging station may provide confirmation of the reservation information and / or an alarm to the user terminal before the predetermined time on the basis of the reservation time. In addition, the operating system or the charging station may provide the user terminal with information about whether charging can be performed according to an emergency situation or other situation occurring at the current charging station.

The operating system or the charging station may re-request the confirmation or / and alarm for a predetermined number of times when there is no response from the user to confirm the reservation information and / or the alarm. However, when there is no response to the re-request or / and the reservation cancellation request, the reservation information of the charger can be deleted and updated. If the reservation is canceled and the reservation information is deleted, the information on the reservation cancellation is transmitted to the user terminal.

In addition, the operating system or the charging station may provide the user with information about the unit price of electricity in advance, and collect payment information and other information from the user to perform a payment procedure in advance. In this case, for example, if the user is a pre-registered user, the unnecessary time is reduced by communicating with the payment server in advance through a request / response on whether or not to perform the payment process through the registered payment method. You may.

In addition, the operating system may provide additional information, for example, address information, location information, map information, etc., of the reserved charging station according to the user's request, for convenience of the user.

In the electric vehicle charging system and communication method thereof of the present invention described above, the function of the charging operation system may be previously downloaded to the charging station or each charger for data related to the charging and payment operation. This is because when communication failure occurs for other reasons, the inconvenience of the user due to the inability to perform the basic charging operation and payment operation is minimized. Therefore, basically, the relevant operation is performed through the charging operation system, but when a communication failure occurs, the mode is switched to perform the related operation or function directly at the charging station or the charger and report the result when the communication is restored in the future. It can also take the form. To this end, between the operating system and the charging station or charger periodically check whether the relevant data is updated, and if necessary, download and update the relevant data to always build up-to-date data to prevent user inconvenience from errors. have.

According to the present invention described above, it is possible to provide an electric vehicle charging system for charging the battery of the electric vehicle, it is possible to increase the efficiency of management and its operation by providing a communication protocol required for the electric vehicle charging system.

In addition, in the present invention, it is possible to facilitate the reservation and pre-payment to facilitate the user of the electric vehicle charging system.

The above embodiment is an example for explaining the technical idea of the present invention in detail, and the present invention is not limited to the above embodiment, various modifications are possible, and various embodiments of the technical idea are all protected by the present invention. It belongs to the scope.

110: power grid 120: central management server system
130: charger 131: smart meter
132: local server 133: charger
140: electric vehicle

Claims (27)

An operation server that manages electric vehicle driving information and charger operation information in a web-based web page format, and establishes a database of the information;
Chargers for collecting information about an electric vehicle and transmitting the collected information to the operation server and supplying electricity to the electric vehicle; And
And a communication server providing a communication environment between the operation server and each charger.
Here, the communication server is in communication with the operation server in a first communication protocol, and the electric vehicle charging system for communicating with each charger in a second communication protocol. The method of claim 1,
The electric vehicle charging system,
And an intermediate server which collects information on a charger of a predetermined unit between the operation server and the charger and transmits the information collected by the request / response protocol to the operation server. The method of claim 2,
An electric vehicle charging system in which the first communication protocol and the second communication protocol use one of TCP / IP and CDMA. The method of claim 3,
The electric vehicle charging system,
A power grid for producing or / or supplying electricity according to the control of the operation server and supplying the generated power to the charger including at least one power provider having its own power transmission, substation, and distribution facilities;
The power grid is an electric vehicle charging system that supports the smart grid (smart grid). 5. The method of claim 4,
The charger,
A converter for converting input AC power into DC power;
An inverter for converting the converted DC power into AC power;
A transformer for transforming the inverted AC power; And
And a rectifier for rectifying the transformed AC power to generate DC electricity. In a communication method in an electric vehicle charging system,
Receiving information of the electric vehicle user;
Delivering the received user information to an operating system to perform a corresponding user authentication;
Receiving information for charging an electric vehicle from a user; And
And charging the electric vehicle in the charger based on the received information. The method according to claim 6,
The charger,
Communication method for downloading the basic information for performing the charging in advance from the operating system prior to the charging. The method of claim 7, wherein
The basic information download process,
Performing authentication of the charger in the operating system and transferring the result to the charger;
Transmitting a response message confirming the result delivered from the charger to the operating system;
Transmitting version information on its basic information from the charger to the operating system;
Determining whether the version information received from the operating system is the latest version, and transmitting a message to download the basic information of the latest version from the charger as a result of the determination; And
And downloading and updating the latest version of the basic information according to the message from the charger. 9. The method of claim 8,
The version information,
A communication method comprising at least one of the version information for the existing unit price fee information, the version information for the program and the version information of the module in the charger. 10. The method of claim 9,
The basic information is,
And at least one of information on charging station operation, information on basic unit price charges, information on charger operating parameters, and information on encryption key values. The method of claim 10,
The received information of the electric vehicle user,
Communication method collected by recognizing ID card tag of user registered in advance. The method of claim 11,
The charger,
And when the authentication fails as a result of the user authentication, outputting announcement text and / or voice related to the authentication failure. The method of claim 12,
The request / response between the operating system and the charger is
In the form of packets,
The packet is,
A communication method comprising start information for notifying the start of a packet, header information, data information, checksum information, and end information for notifying the end of a packet. The method of claim 13,
The header information is
Communication including at least one of information on the transmission date of the packet, corresponding packet sequence number information, machine type information for identifying the type of EV charger, charging station ID information, physical equipment number information of the charger, and indication identifier information Way. 15. The method of claim 14,
In the machine type,
A communication method comprising an entire equipment, a quick charger, a slow charger, a contactless charger, a slow charger for a motorcycle, and a quick charger for a motorcycle. 16. The method of claim 15,
The data information,
And at least one of information about the machine mode, information about the machine state, and additional information. A charger connected to an electric vehicle, collecting and transmitting payment information of the electric vehicle to an operating system and charging the electric vehicle according to the control of the operating system;
An operating system which determines a payment amount based on a supply unit price based on the payment information, transmits the determined payment amount and payment information to a payment server, receives a transaction history of payment completed by the payment server, and delivers the transaction details to a charger; And
And a payment server that performs a payment based on the payment amount and the payment information transmitted from the operation system and delivers the result to the operation system. Accessing a web page of the electric vehicle operating system through the terminal;
Selecting a particular charging station from a connected web page;
Selecting and reserving at least one charger in the selected charging station; And
And transmitting the reservation information to the corresponding charging station and performing a reservation procedure based on the reservation information transmitted from the charging station. 19. The method of claim 18,
The charging station,
Based on the reservation information, it is determined whether the reservation of the charger is duplicated, and if the determination result is duplicated, other chargers, charging stations, How to book an electric vehicle charging system that provides information for different time zones. 20. The method of claim 19,
The terminal comprises:
A method of booking an electric vehicle charging system that provides information about its location and receives information from the operating system about a charging station near (most) the current user's location. 21. The method of claim 20,
The information includes:
A method for booking an electric vehicle charging system including at least one of map information, GPS information, charging unit price information of each charging station, and current usage status of chargers in each charging station so that a terminal user can find a corresponding charging station at a current location. The method of claim 21,
The operating system or charging station,
A method for reserving an electric vehicle charging system for requesting confirmation of information on a reservation fact before a predetermined time from a reservation time and providing an alarm to a reserved terminal. The method of claim 22,
The operating system or charging station,
A method of booking an electric vehicle charging system that provides information on whether a charge can be performed, including an emergency or other situation at the charging station in relation to the scheduled time. 24. The method of claim 23,
The operating system or charging station,
How to reserve the electric vehicle charging system to delete and update the reservation information for the charger of the charging station when there is no response or when the user cancels the reservation process when the alarm for the reserved information from the terminal. 25. The method of claim 24,
The operating system or charging station,
The electric vehicle charging system reservation method of providing information on the unit price of electricity supply to the terminal, and collects information about the amount of charge and other information from the user to perform a pre-booking payment procedure. 26. The method of claim 25,
The operating system or charging station,
In the case of a terminal registered in advance, the electric vehicle charging system reservation method for performing the payment process by communicating with the payment server through the request / response to whether or not to perform the payment process through the pre-registered payment means. The method of claim 26,
The operating system or charging station,
An electric vehicle charging system reservation method for providing additional information including at least one of address information, location information, and map information for a related electric charging station, which is reserved at the request of a terminal or based on location information of the terminal.

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