KR102433299B1 - Smart charging system based on battery charging status information - Google Patents

Abstract

The charging state information-based smart charging system of the present invention includes: a recognition unit for acquiring vehicle information and battery information for charging; a calculator for generating a discrete charging schedule composed of a plurality of discrete charging and determining each discrete charging condition; a charging command unit receiving a charging signal from the operation unit to generate a charging command for a specific charger and instructing the specific charger; a storage unit for storing the vehicle information, battery information, and a discrete charging schedule; an operation communication unit that communicates with an external operating system; and a settlement unit configured to perform settlement on a result of charging according to the discrete charging schedule.

Description

Smart charging system based on battery charge status information

The present invention relates to a smart charging system and a discrete charging method for performing smart charging according to a discrete charging schedule based on charge state information of a battery provided in an electric vehicle.

An electric vehicle (EV) refers to a vehicle that uses an electric battery and an electric motor without using petroleum fuel and an engine. Electric vehicles are researched and developed not only in pure electric vehicles (EVs) that run only with batteries and electric motors, but also in the form of hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs). is being used

Electric vehicles basically do not use a fossil fuel-using automobile engine as a power source, but rotate a battery, supercapacitor, inverter, and motor to drive the wheels of the vehicle via a speed reducer. The inverter is connected to the DC-DC converter to supply DC voltage to the Electronic Control Unit (ECU), and the ECU is linked with the Electronic Power Steering (EPS) that controls the steering state and works with an actuator. ), is connected to the brake, and electronically controls the state of the automatic transmission and the anti-lock brake system (ABS).

The electric vehicle battery may use, for example, a lithium battery and be equipped with a 400V driving battery and a 12V auxiliary battery. In the case of an electric vehicle, the battery is discharged during operation, so it must be charged regularly. The charging time is known to take 4 to 9 hours when using a fully charged battery and 30 minutes to 1 hour for fast charging, and the slow charging or rapid charging speed is improving according to the development of battery technology. An electric vehicle charger provides a function of charging electric energy by connecting a charging cable to a charging terminal of an electric vehicle, and generally supports a high-speed or low-speed charging type.

Existing electric vehicle charging technology, which continuously charges to a target value immediately after connection, is likely to cause a concentration of power load as the charging demand may be concentrated in a specific time period or in some regions. Direct control of electric vehicle charging power is required as a preemptive measure or a post-mitigation measure for this phenomenon.

For accurate charge control, EV internal information such as battery state of charge information (SOC) must be brought to the outside, but there are currently limitations in how to acquire internal information. Although it is possible to exchange battery status information through digital communication between EV and charger, commercial chargers and vehicles capable of digital communication have not yet been released.

Accordingly, it was difficult to construct a smart charging system based on the charging state information of the electric vehicle battery.

Korean Patent Publication No. 10-0229168

An object of the present invention is to provide a charging state information-based smart charging system and a discrete charging method capable of directly controlling the charging power load by acquiring battery state information regardless of whether digital communication is connected or not.

A charging state information-based smart charging system according to an aspect of the present invention includes: a recognition unit for acquiring vehicle information and battery information for charging; a calculator for generating a discrete charging schedule composed of a plurality of discrete charging and determining each discrete charging condition; a charging command unit receiving a charging signal from the operation unit to generate a charging command for a specific charger and instructing the specific charger; a storage unit for storing the vehicle information, battery information, and a discrete charging schedule; an operation communication unit that communicates with an external operating system; and a settlement unit configured to perform settlement on a result of charging according to the discrete charging schedule.

Here, the recognition unit may collect the initial SOC of the battery and whether the vehicle user agrees to charge according to the discrete charging schedule.

Here, the recognition unit may receive initial SOC information and updated SOC information of the battery from a vehicle terminal connected to the OBD terminal of the vehicle.

Here, the recognition unit, an application or electric vehicle loaded into the smartphone so that the user utilizes one or more of the interface means - typing, voice recognition, and image recognition, the SOC value of the battery two or more times with a time difference in the initial stage of charging or during charging It is provided on the dashboard of the charger or on the control panel of the charger.

Here, the calculating unit may include: a scheduler generating the discrete charging schedule; and a comparison determination unit configured to determine whether charging is paused or continued to generate a charging signal.

Here, the scheduler may include: a short-time charging instructing unit for transmitting a short-time charging signal for the first charging to the charging command unit when detecting the driving signal received from the recognition unit; After the first charging is performed, an updated SOC, which is an updated remaining amount SOC value, is acquired through the recognition unit, and a charging characteristic value (K1) and a required charging amount (ΔS) are respectively calculated from the initial SOC and the updated SOC. a value calculation unit and a required charging amount calculation unit; and a subroutine for generating a charging schedule by receiving the charging characteristic value K1 and the required charging amount ΔS.

Here, the subroutine combines the unit price (Wi) and the total charging time (tc) of a plurality of hourly charging power charges received from the storage unit to minimize the total charging power charges until fully charged. The charging schedule may be generated in which the charging pause signal txi is generated during the peak power rate within the time range tc, and the charging continuation signal toi is generated during other time periods.

Here, the comparison determination unit may perform a process of recognizing the charging schedule received from the scheduler and determining whether the next charging time period is a charging continuation (toi) or a charging pause (txi) time period.

Here, the settlement unit transmits the smart charging fee (\e) received from the operation unit to the storage unit, using the charger charging end state signal received from the charging command unit as a start signal, and received from the comparison determination unit The charging rate can be calculated in consideration of the charging time (ti) and the unit price (Wi) of the charging rate for each charging time period.

Here, the smart charging system may have the form of a software package module that is executed in the vehicle user's smart phone, the MCU of the specific charger, or a charging/discharging device other than the vehicle.

An SOC-based charging control system according to another aspect of the present invention includes a function of obtaining vehicle information and battery information for charging, a function of generating a discrete charging schedule composed of a plurality of discrete charges, and determining each discrete charging condition a package module to determine whether charging is paused or continued to perform a function of generating a charging signal;

a charger for charging the vehicle according to the charging signal; and an operating system that performs data communication with the package module and the charger, provides information for generating the discrete charging schedule, and supports settlement for charging according to the discrete charging schedule.

Here, the package module may be in the form of a software package module that is executed in the vehicle user's smart phone, the MCU of the specific charger, or a charging/discharging device other than the vehicle.

In accordance with another aspect of the present invention, there is provided a method for discrete charging based on state of charge information, comprising: confirming an initial SOC of a vehicle battery for a vehicle connected to a charger connected to a charging system; performing a first charging for a first predetermined period of time; checking the updated SOC of the vehicle battery after performing the first charging; calculating a charging characteristic value and a required charging amount from the initial SOC and the updated SOC; establishing a discrete charging schedule for the vehicle battery; and performing each discrete charging according to the discrete charging schedule.

Here, in the checking of the initial SOC and the checking of the updated SOC, the initial SOC information and the updated SOC information may be transmitted from a vehicle terminal connected to the OBD terminal of the vehicle.

Here, the confirming the initial SOC and the confirming the updated SOC may secure input values of the initial SOC information and the updated SOC information of the user of the vehicle to the user interface means.

Here, in the setting of the discrete charging schedule, a discrete charging schedule including discrete charging at another charging station where the vehicle will be located in the future may be generated according to the driving schedule information of the vehicle.

Here, in the step of performing the discrete charging, it may be confirmed whether or not at least one of the time period specified in the discrete charging schedule, the actual charging cost, and the location of the vehicle is satisfied.

Here, in the step of performing the discrete charging, a charging command or a charging hold command process is executed, and the SOC of the battery is in a fully charged state ( SOC X%) or when the accumulated charging time is equal to the total charging time (tc), charging may be terminated.

When the smart charging system and/or the discrete charging method based on the charging state information according to the spirit of the present invention having the above configuration are implemented, the battery state information can be acquired regardless of whether digital communication is connected, and the charging power load can be directly controlled. There is this.

The charging state information-based smart charging system and/or the discrete charging method of the present invention has the advantage of increasing the convenience and economic feasibility of charging an electric vehicle and simultaneously utilizing the electric vehicle as an effective resource required for power grid operation.

1 is a block diagram illustrating a smart charging system that proactively performs a smart charging method according to the spirit of the present invention.
2 is an operation configuration diagram of the SOC-based charging control system including the smart charging system of FIG.
3 is a block diagram illustrating an embodiment of a calculation unit provided in the smart charging system of FIG. 1 .
4 is a graph illustrating a discrete charging control method using an SOC-based charging schedule.
5 is a flowchart illustrating a schedule created by an embodiment of a scheduler provided in the smart charging system of FIG. 1;
6 is a block diagram illustrating an embodiment of a comparison determination unit provided in the smart charging system of FIG. 1 .
7 is a flowchart illustrating a discrete charging method performed in a smart charging system based on battery state of charge information according to the spirit of the present invention.
8 and 9 are detailed flowcharts specifically illustrating the discrete charging method shown in the flowchart of FIG. 7 as an example in a smart charging system including an electric vehicle (EV) and a charger.
10 is a detailed flowchart specifically illustrating the discrete charging method shown in the flowchart of FIG. 7 as another example in a smart charging system including an electric vehicle (EV) and a charger.

In describing the present invention, terms such as first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms are only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.

When a component is referred to as being connected or connected to another component, it may be directly connected or connected to the other component, but it can be understood that other components may exist in between. .

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression may include the plural expression unless the context clearly dictates otherwise.

In this specification, the terms include or include are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, and includes one or more other features or numbers, It may be understood that the possibility of the presence or addition of steps, operations, components, parts, or combinations thereof is not precluded in advance.

In addition, shapes and sizes of elements in the drawings may be exaggerated for clearer description.

In the present invention, the continuous charging time of the electric vehicle is redistributed to the discrete charging time. As a discrete charging method, after short-time charging is performed, an updated battery remaining amount (updated SOC) is acquired, and the initial battery remaining amount (initial SOC) and the updated battery remaining amount (updated SOC) are used as the charging characteristic value (K1) and the required full charge amount (ΔS) Calculate, create a discrete charge schedule, and apply it to discrete charge.

In addition, in order to build a battery charge state information (SOC)-based smart charging system, a smart charging system that performs a discrete charging method is configured.

Accordingly, the SOC-based smart charging system can be configured by installing the smart charging system shown at the charging station site without replacing the previously installed chargers having a relatively high replacement cost.

The SOC-based smart charging system proposes to redistribute the continuous charging time of an existing electric vehicle to discrete charging time. In this case, the input value of the charging time redistribution schedule (smart charging schedule) may be major decision-making factors of stakeholders related to electric vehicle charging, such as charging rate level, input SOC, departure time, power quality status, and power supply and demand balance situation.

1 is a block diagram illustrating a charging system that proactively performs a smart charging method according to the spirit of the present invention.

The illustrated charging system 1000 includes: a recognition unit 200 for acquiring vehicle information for charging and in-vehicle battery information; an operation unit 300 for generating a discrete charging schedule composed of a plurality of discrete charging and determining each discrete charging condition; Charging command unit 600 for instructing charging to the connected charger; a storage unit 800 for storing the vehicle information, the battery information, and the discrete charging schedule; an operation communication unit 700 for performing communication with an external operating system; and a settlement unit 500 that performs settlement on a result of charging according to the discrete charging schedule.

The smart charging system 1000 may serve to collect major factors of the SOC-based smart charging system, reconfigure and process them according to the needs of each stakeholder, and provide them. In addition, it can improve charging convenience and economic feasibility, and at the same time support systematic management of electric vehicles so that they can be used as effective resources required for power grid operation.

The illustrated recognition unit 200 may acquire information from a plurality of electric vehicles or chargers located at a charging station site, recognize individual chargers and charging readiness states of electric vehicles, and collect various information necessary for calculation and system operation.

The illustrated calculation unit 300 includes a scheduler 330 for generating a smart charging schedule; and a comparison determination unit 340 that generates a charging signal by determining whether charging is paused or continued.

The illustrated settlement unit 500 may estimate the total charging fee according to the smart charging schedule and secure basic data required for subsidy calculation. Here, the subsidy may be established for consent and/or cooperation for discrete charging according to the spirit of the present invention.

The illustrated charging command unit 600 may receive a charging signal from the operation unit 300 , generate a charging command for a specific charger, and transmit it to the specific charger.

The illustrated operation communication unit 700 may perform a wired/wireless two-way communication function for exchanging information with an external system (a higher operation server).

The illustrated storage unit 800 may store data collected/generated by the components, and may provide the stored data upon request.

The recognition unit 200, the customer (user) - charger - electric vehicle matching information, the connection state of the coupler (the connector of the charger and the inlet of the vehicle), the initial EV battery SOC (State of Charge, remaining amount %, S1), etc. It is possible to collect / secure whether or not to consent to collection and smart charging. In this case, the relevant elements may be interconnected by using an appropriate wired/wireless communication method, and the collected information may be recorded in the storage unit 800 by matching and dividing by customer (user) - charger - electric vehicle.

Among the recognition results of the above-described information, in the case of smart charging failure, the recognition unit 200 may transmit a simple charging signal (conventional method charging execution command) to the charging command unit 600 . On the other hand, in the case of smart charging agreement, the recognition unit 200 may transmit a charging schedule generation request signal to the operation unit 300 .

Among the information necessary for implementing the idea of the present invention, the most important is vehicle internal information such as the SOC of the EV battery, and specific methods for the recognition unit 200 to obtain it are presented as follows.

As a first method, a terminal dedicated to data collection (acquisition) may be attached to the electric vehicle, and automatic collection and transmission may be obtained from the terminal. That is, the recognition unit 200 may receive initial SOC information and updated SOC information from a vehicle terminal connected to the OBD terminal of the vehicle.

Specifically, a terminal device is installed on the vehicle OBD terminal and vehicle internal information is acquired through this. It can be configured for easy connection.

As a second method, it may be based on a direct input of a user (customer). That is, to secure the input values of the initial SOC information and the updated SOC information of the user of the vehicle to the user interface means. The recognition unit 200 may receive the input values from the interface means.

Specifically, the SOC value of the vehicle is directly inputted by the user through the interface means two or more times with a time difference between the initial charging period or the charging process. At this time, it can be configured to automatically set the input time to a user setting or an input time.

In addition, as a direct input method, all available Human-Machine Interfaces such as typing, voice recognition, and image recognition can be applied. The user interface means may be provided in an application loaded on a user's smartphone, a dashboard of an electric vehicle, an operation unit of a charger, and the like.

A third method is to configure the past charging history to automatically calculate and store charging characteristic values through accumulation/patterning/estimation/correction processes, and to configure so that the user can search and selectively input them. The recognition unit 200 may directly receive the input charging characteristic value.

A fourth method may be obtained by attaching a wireless communication terminal for data acquisition separately to the vehicle and communicating with the smart charging system package module of FIG. 2 . For example, it is possible to obtain by recognizing vehicle cluster or windshield HUD (Head Up Display) display information, user voice, and the like with a camera and microphone-embedded communication device.

The fifth method is to receive the SOC value from the electric vehicle by using a user application (eg, an application for vehicle management provided by a manufacturer or a third party) that mediates data transfer. The data transfer medium may be applied by screen recognition of an application program or an application-application program method input. That is, the user application functions as the recognition unit 200 .

Recently, vehicle manufacturers are mainly actively implementing a function of providing vehicle information to a user's smartphone, and the data transfer mediating user application is advantageously in the form of a user's smartphone application, but is not limited thereto.

Specifically, when the SOC value is recognized in the vehicle information app provided by the vehicle manufacturer and transmitted to the smart charging system by presetting, it is used as the user input SOC value (recognizing the screen information of the app, reading the DB directly, communication method between apps, etc.) can be used.

The smart charging system is implemented to perform the discrete charging method according to the spirit of the present invention by controlling only the chargers disposed at one charging station site, or by controlling a large number of chargers disposed between a plurality of spaced charging stations. It can be implemented to perform the discrete charging method according to the spirit of the present invention.

In addition, the above-described abnormal charging schedule for the specific vehicle may include discrete charging at other charging stations where the vehicle will be located in the future according to operation schedule information of the specific vehicle.

2 is an operation block diagram of the SOC-based charging control system in which the smart charging system of FIG. 1 is implemented in the form of a package module.

The illustrated smart charging system package module may be implemented in the form of an application (app) inside the smartphone. In this case, a kind of distributed arrangement of calculation units_Edge Computing execution structure is formed. In this way, by placing the calculation module that generates the smart charging schedule locally (eg, a smartphone app, etc.) rather than on the top-level server, it is possible to block possible bottlenecks such as a decrease in calculation speed and communication overload.

In another implementation, it may be applied as a software package that can be easily downloaded, installed, and driven in a third device other than a vehicle among charge/discharge related devices such as a charger MCU (Main Control Unit).

In the illustrated configuration, for example, Wifi, Bluetooth, and LTE/3G/5G communication may be applied to route ①, Wifi, Ethernet, or LTE/3G/5G communication may be applied to route ②, and route ③ may be Wifi. However, LTE/3G/5G communication may be applied.

The illustrated structure will be described in detail in a way that utilizes a smartphone as a communication medium.

It can be configured to acquire essential information such as SOC values from individual vehicles through communication technologies (BlueTooth, NFC, LTE/3G, etc.) applied to smartphones and exchange information with the upper operating system when necessary. In this case, a communication terminal device may be attached to the vehicle in order to acquire the in-vehicle battery SOC.

In addition, using a smartphone basic communication module such as LTE/3G as long-distance communication with the upper operating system, etc., the smart charging system package module shown in the figure and the upper operating system are smart It is possible to secure functional connectivity as an SOC-based charging control system for performing the discrete charging method. In other words, the package module application installed in the user's specific smartphone, the charger at a specific site, and the upper operating system may form an SOC-based charging control system.

FIG. 3 is a block diagram illustrating an embodiment of a calculator provided in the smart charging system of FIG. 1 .

The illustrated operation unit exemplifies the scheduler 330 in more detail, and detects the subroutine driving signal received from the recognition unit 200, and simultaneously sends a short-time charging signal for the first charging to the charging command unit ( 600) a short-time charging instruction unit 331 to transmit; After the first charging (i.e., short-time charging) is executed, an updated SOC, which is an updated remaining amount SOC value, is acquired through the recognition unit 200, and the obtained initial SOC (S1) and updated SOC (S2) are used as the charging characteristic value ( K1) and a charging characteristic value calculation unit 332 and a required charging quantity calculation unit 333 for calculating the required buffering charge amount (ΔS), respectively; The subroutine 334 may include a subroutine 334 for receiving the charging characteristic value K1 and the required buffering charge amount ΔS to generate a charging schedule.

In the short-time charging instruction unit 331 , the short-time means a sufficient test time to determine the charging characteristics per unit time of the electric vehicle battery, and the first charging according to the spirit of the present invention is performed during this test time.

The first charging time may be configured to be as short as possible during which the smart charging system or the upper server can automatically calculate an appropriate time value for each vehicle through accumulation/patterning/estimating/correction processes. At this time, considerations for automatic calculation may be the starting point SOC, battery temperature, outside temperature and humidity, whether or not the previous parking-driving is performed, and the parking-driving period.

The charging characteristic value calculation unit 332 may calculate the charging characteristic value K1 according to Equation 1 below.

Equation 1 exemplifies the case where the first charging time is set to 10 minutes, and of course, other times shorter or longer than this may be set.

The required charging amount calculation unit 333 may calculate the required charging amount ΔS according to Equation 2 below.

In Equation 2, the required charging amount ΔS may mean the charging amount from the updated SOC(S2) excluding the initial SOC(S1) to the customer input SOC(X).

4 is a graph illustrating a discrete charging control method using an SOC-based discrete charging schedule.

5 is a flowchart illustrating a schedule created by an embodiment of the scheduler 330 provided in the smart charging system of FIG. 1 .

Here, the discrete charging schedule consists of a plurality of discrete charging. Each discrete charge means a discrete unit charge performed at the discrete charge time specified in the above discrete charge schedule.

The subroutine 334 may calculate the total charging time tc using K1 and ΔS received from the charging characteristic value calculation unit 332 and the required charging amount calculation unit 333 .

The subroutine 334 is, in generating (creating) the charging schedule, by combining, for example, the unit price (Wi) and the total charging time (tc) of 8760 hourly charging power charges received from the storage unit 800 per hour. In order to minimize the sum of the charging power charges until fully charged, the charging pause signal txi is generated during the power rate peak time within the total charging time tc, and the charging continuation signal toi is generated at other times. can do.

According to the implementation, even when the comparison determination unit 340 performs the pre-written charging schedule, the subroutine 334 generates a charging pause signal txi or a charging continuation signal toi for determination, It may be transmitted to the comparison determination unit 340 .

Also, a change in the charging schedule may be transmitted through the communication unit 700 by attaching a periodic or aperiodic tag to an external upper server. At this time, the hourly charging power rate unit price (Wi) can reflect all of the TOU (Time of Use), CPP (Critical Peak Pricing), and RTP (Real Time Price) plans, and select them if necessary. It can be configured to be applicable.

Calculation of the total charging time tc in the above-described process may be performed according to Equation 3 below.

Here, as can be seen from the graph of FIG. 4 , the calculation result value may mean the total of the actual charging time required until fully charged (tc=k1+c2+c3+c4).

Calculation of the smart charging fee (￦e) in the above-described process may be performed according to Equation 4 below.

The result value according to Equation 4 may be stored in the storage unit 800 via the settlement unit 500 .

In the description using the above equations, the case where the charging rate is applied differentially for each time period is exemplified, but in other implementations, social costs according to a predetermined rule for electricity use may be applied for each time period. For example, a value converted by the average carbon emission induced to produce unit power consumed in a corresponding time period may be applied. For example, a cost that reflects not only the power generation cost but also the transmission/distribution cost for supplying power to the corresponding charging station site may be applied.

6 is a block diagram illustrating an embodiment of the comparison determination unit 340 provided in the smart charging system of FIG. 1 .

The illustrated comparison determination unit 340 recognizes the smart discrete charging schedule received from the scheduler 330, and performs a process of determining whether the next charging time period is a charging continuation (toi) or a charging pause (txi) time period. . At this time, if the charging continues (toi), the process moves to the 'charge command (S701)' process shown, and transmits a charging signal to the charging command unit 600, and if it belongs to the charging hold (txi) time zone, the 'charge hold command ( S702)' process, after transmitting the charge hold signal to the charging command unit 600, the battery SOC measurement result is transmitted from the charging command unit 600, and the battery charge state is fully charged (SOC X%) or until now If the accumulated charging time of is equal to the total charging time (tc), it moves to the 'Charging end command (S703)' process to prepare a charging end command, and if it is not fully charged or the accumulated charging time is less than the total charging time, the above process Repeat to enable smart charging until the battery full charge requirement is reached.

The settlement unit 500 uses the charging end state signal of the charger received from the charging command unit 600 as a start signal, and the smart charging rate (\e) received from the operation unit 300 is stored in the storage unit 800 . and finally calculates the smart charging rate in consideration of the charging time (ti) received from the comparison determination unit 340 and the charging rate unit price (Wi) for each charging time period and transmits it to the storage unit 800, based on this to secure the basic data for subsidy calculation.

7 is a flowchart illustrating a discrete charging method performed in a smart charging system based on battery state of charge information according to the spirit of the present invention. The illustrated discrete charging method may be mainly performed by a smart charging system.

The illustrated discrete charging method includes: confirming an initial SOC of a vehicle battery for a vehicle connected to a charger connected to the charging system (S150); performing a first charging (short-term charging) for a first predetermined period (S200); checking the update SOC of the vehicle battery after the first charging is executed (S250); calculating a charging characteristic value and a required charging amount from the initial SOC and the updated SOC (S300); setting a discrete charging schedule for the vehicle battery (S500); and performing each discrete charging according to the discrete charging schedule ( S700 ).

8 is a detailed flowchart illustrating the discrete charging method shown in the flowchart of FIG. 7 as an example in a smart charging system including an electric vehicle (EV) and a charger.

In the detailed flowchart shown, the smart charging system package module is a concept including user (driver) interfaces mainly centered on the smart charging system. Although the electric vehicle (EV) and the charger (#n charger) are directly connected, in the drawing, the smart charging system package module is placed in the center to focus on the smart charging system.

In FIG. 8, the connection process between the electric vehicle and the charger is expressed. When the electric vehicle and the charger are connected through the charging terminal, the vehicle number, vehicle identification number, and other information of EV specifications are transmitted from the electric vehicle to the smart charging system via the charger, and the charger identification number and the Reading information of the RFID card for charging service recognized by the user is transmitted to the charger.

When a user inputs a target charge amount value through a user interface such as a smartphone application, the target charge amount value is converted into a target SOC and obtained by the smart charging server. In an implementation different from that shown, the target charge amount value may be input by an input means provided in the charger.

In addition, Figure 8 further represents the step of checking whether to apply smart discrete charging according to the spirit of the present invention. If it is confirmed in the checking step that simple charging according to the prior art is applied, normal charging according to the prior art is performed, and the procedure according to the spirit of the present invention is terminated.

In the case of applying smart discrete charging, short-term charging (first charging) and SOC check are performed as the illustrated steps S150, S200, and S250, and the charging characteristic value (K1) and the required charging amount (ΔS) in the illustrated step S300 ) and provide it as a subroutine.

The step of checking the illustrated initial SOC (S150) and the step of checking the updated SOC (S250) are transmitted from a data collection (acquisition) dedicated terminal provided in an electric vehicle (EV), or scanned from a user (driver) interface device. implemented in a way that is received.

The illustrated step S500 represents that the subroutine is performed in such a way that a discrete charging schedule is created and stored using the charging characteristic value (K1) and the required buffering charging amount (ΔS).

In the illustrated step S700, the 'charge command (S701)' or 'charge hold command (S702)' process is performed according to whether the charging time period is the charging continue (toi) or the charging pause (txi) time according to the subsequent discrete charging schedule. and when the battery SOC is fully charged (SOC X%) or the accumulated charging time is equal to the total charging time tc, charging is terminated (S703).

In implementing the discrete charging method shown in FIGS. 8 and 9, the main factors of the SOC-based smart charging system are collected and reconfigured to meet the needs of each stakeholder. can

For example, in the illustrated step S100, key decision-making factors of stakeholders related to electric vehicle charging, such as charging rate level, input SOC, departure time, power quality status, and power supply and demand balance situation, may be reflected.

Accordingly, in step S190, simple charging is performed in case of smart charging motion, and charging is performed according to the smart discrete charging schedule in case of smart charging motion. In addition, the user directly inputs the SOC value of the vehicle two or more times with a time difference at the beginning of charging or during charging, and in this case, the input time may be configured to be set automatically by a user setting or an input time.

10 is a detailed flowchart illustrating another example of the discrete charging method shown in the flowchart of FIG. 8 in a smart charging system including an electric vehicle (EV) and a charger in detail. In the illustrated flow configuration, processes after branch A and branch B are as shown in FIG. 9 .

The step of checking the illustrated initial SOC (S150') and the step of checking the updated SOC (S250') are implemented in a manner of receiving the measured value of the charger, which is different from the case of FIG. 7 . To this end, in order to perform the discrete charging method of FIG. 9 , a charger supporting real-time measurement of the SOC of an electric vehicle battery being charged in connection with digital communication or the like is required.

Since the configuration of FIG. 8 is substantially similar to that of FIG. 8 except for the method for checking the SOC, a redundant description will be omitted.

Those skilled in the art to which the present invention pertains should understand that the present invention can be embodied in other specific forms without changing the technical spirit or essential characteristics thereof, so the embodiments described above are illustrative in all respects and not restrictive. only do The scope of the present invention is indicated by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention. .

200: recognition unit
300: arithmetic unit
330: scheduler
340: comparison determination unit
500: settlement department
600: charge command unit
800: storage
1000: smart charging system

Claims (18)

a recognition unit for acquiring vehicle information and battery information for charging;
an operation unit for generating a discrete charging schedule composed of a plurality of discrete charging and determining each discrete charging condition;
a charging command unit for receiving a charging signal from the calculating unit, generating a charging command for a specific charger, and instructing the specific charger;
a storage unit for storing the vehicle information, battery information, and a discrete charging schedule;
an operation communication unit that communicates with an external operating system; and
A settlement unit for performing settlement on a result of charging according to the discrete charging schedule
including,
The recognition unit, the user interface means - typing, voice recognition, image recognition, the SOC value of the battery two or more times with a time difference in the initial stage of charging or during charging, so that the user utilizes one or more of the application or the dash of the electric vehicle loaded into the smartphone Provided on the control panel of the board or charger - A smart charging system that acquires the value directly input by .
According to claim 1,
The recognition unit,
A smart charging system for collecting the initial SOC of the battery and whether the vehicle user agrees to charge according to the discrete charging schedule.
delete delete According to claim 1,
The calculation unit,
a scheduler for generating the discrete charging schedule; and
A comparison determination unit that determines whether charging is paused or continued to generate a charging signal
A smart charging system that includes.
6. The method of claim 5,
The scheduler is
a short-time charging instructing unit for transmitting a short-time charging signal for first charging to the charging command unit when detecting the driving signal received from the recognition unit;
After the first charging is performed, an updated SOC, which is an updated remaining amount SOC value, is acquired through the recognition unit, and a charging characteristic value (K1) and a required charging amount (ΔS) are respectively calculated from the initial SOC and the updated SOC. a value calculation unit and a required charging amount calculation unit; and
A subroutine for generating a charging schedule by receiving the charging characteristic value (K1) and the required charging amount (ΔS)
A smart charging system that includes
7. The method of claim 6,
The subroutine is
Within the range of the total charging time (tc) so that the sum of the charging power charges up to full charge is minimized by combining the unit price (Wi) and the total charging time (tc) of a plurality of hourly charging power charges received from the storage unit. A smart charging system for generating the charging schedule by generating a charging pause signal (txi) during the peak power rate time period and generating a charging continuation signal (toi) during other time periods.
8. The method of claim 7,
The comparison determination unit,
A smart charging system that recognizes the charging schedule received from the scheduler and performs a process of determining whether the next charging time period is a charging continuation (toi) or a charging pause (txi) time period.
8. The method of claim 7,
The settlement unit,
Using the charging end status signal of the charger received from the charging command unit as a start signal, the smart charging rate (\e) received from the calculation unit is transmitted to the storage unit, and the charging time (ti) received from the comparison determination unit and A smart charging system that calculates the charging rate considering the unit price (Wi) of the charging rate for each charging time.
According to claim 1,
The smart charging system is a smart charging system, characterized in that it has the form of a software package module that is executed in the vehicle user's smartphone or the MCU of the specific charger or a charging/discharging device other than the vehicle.
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