KR20170008103A - A watt-hour meter - Google Patents

Abstract

A watt hour meter is installed at the charging station. The watt hour meter includes a display unit; And a control unit for controlling the display unit to display information. The control unit generates guidance information including a plurality of charge types when the power usage peak time zone is determined based on the charging information of the electric vehicle and the power supply status information, displays the guidance information on the display unit, Is selected, charging according to a specific charging type is performed. The display unit displays guidance information.

Description

{WATT-HOUR METER}

The present invention relates to a watt-hour meter.

Electric vehicles such as electric bicycles, electric motorcycles, and electric vehicles driven by electricity are becoming popular due to the depletion of fossil fuels and the pollutants generated when fossil fuels are used.

Such an electric vehicle is driven using the electric power charged in the built-in battery. When the electric vehicle is fastened to the electric vehicle charger, the electric vehicle charger supplies electric power to the electric vehicle to be charged in the battery.

A watt-hour meter is provided in the electric vehicle charger to measure the amount of electric power before and after charging the electric vehicle from the electric vehicle charger when the electric vehicle is charged.

However, the conventional watt-hour meter plays a role of measuring the watt-hour meter before and after charging only without considering the power use peak time zone, and it is possible to prevent the sudden drop of the reserve power when the power consumption is rapidly increased none. Therefore, the charging of the electric vehicle indiscriminately at the power use peak time period without considering the power use peak time period as in the prior art can cause a large national problem such as a large-scale power outage, It is imperative that measures are taken to control the situation.

The present invention is directed to solving the above-mentioned problems and other problems.

Another object of the present invention is to provide a watt-hour meter capable of inducing regulation of the charging time zone of the electric vehicle at the power use peak time zone, thereby assisting in national power supply and demand.

According to an aspect of the present invention, a watt-hour meter for measuring a charged amount of an electric vehicle generates induction information including a plurality of charging types based on charging information of the electric vehicle and information on the electric power supply and demand status A controller for performing charging according to the specific charging type when a specific charging type is selected among the plurality of charging types; And a display unit for displaying the guidance information.

The effect of the watt hour meter according to the present invention will be described as follows.

According to at least one of the embodiments of the present invention, induction information is provided in advance to the user who intends to charge in the power use peak time zone, thereby inducing the user to avoid the peak time zone, Power consumption can be reduced, thereby preventing an increase in power supply and demand.

Accordingly, by inducing all the electric vehicle users in the power usage peak time zone, considerable national power consumption can be reduced, thereby preventing national emergency or power outage due to an increase in power supply and demand.

Further scope of applicability of the present invention will become apparent from the following detailed description. It should be understood, however, that the detailed description and specific examples, such as the preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art.

1 is a schematic diagram showing an electric vehicle charging system according to the present invention.
2 is a block diagram showing the electric vehicle charger of FIG.
3 is a block diagram showing in detail the configuration of the watt hour meter of FIG.
4 is a flowchart illustrating a method of controlling the watt-hour meter according to the present invention.
5 is a view showing information displayed on the display unit during the charging process.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

1 is a schematic diagram showing an electric vehicle charging system according to the present invention.

Referring to FIG. 1, an electric vehicle charging system according to the present invention may include an electric vehicle 10 and an electric vehicle charger 20. The electric vehicle charger 20 may be referred to as an electric charging station.

The electric vehicle 10 is driven by using electricity as a power source, and may include electric bicycles, electric motorcycles, electric vehicles, and the like, but the invention is not limited thereto.

The electric vehicle charger 20 is a member for supplying electric power for charging the electric vehicle 10, and may be installed, for example, on a road or a building.

Although not shown, the electric vehicle charger 20 and the electric vehicle 10 can be connected using a cordset cable 30. [ The cordset cable 30 can supply electric power of the electric vehicle charger 20 to the electric vehicle 10 while allowing communication between the electric vehicle charger 20 and the electric vehicle 10.

Although not shown, the server can be connected to the electric vehicle charging station 20 by wire or wireless, so that the charging rate for the electric vehicle 10 can be calculated and paid.

2 is a block diagram showing the electric vehicle charger of FIG.

2, electric power can be charged from the system power supply of the electric vehicle charger 10 to the electric vehicle 10.

The electric vehicle charger 10 may include a main processing board 150, a communication board 160 and a watt hour meter 200.

Reference numerals 110 and 120 are protection devices, and 170 may be an output device.

The main processing board 150 receives the charging data of the electric vehicle 10 via the pilot communication 140 and transmits the information of the electric vehicle and the card reader value to a host system such as a server via the communication board 160 .

When the approval of the electric vehicle 10 is completed in the host system, the main processing board 150 receives the approval result, receives the current accumulated electric energy value from the watt hour meter 200, (10).

When the grid power source and the electric vehicle 10 are connected to power, electric power is supplied from the electric vehicle charger to the electric vehicle 10, and the watt hour meter 200 measures the electric power amount.

When the charging of the electric vehicle 10 is completed, the main processing board 150 receives the charging completion information from the electric vehicle 10 through the pilot communication 140, and transmits the charging completion information to the system power source and the electric vehicle 10 via the magnetic switch. Disconnect the power connection between the two.

In addition, the main processing board 150 receives a power amount value from the watt hour meter 200, calculates a power amount value according to the actual charging time through the difference in the accumulated power amount value before and after the charging, and calculates the charging rate based on the calculated amount have.

As another example, the cumulative amount of power value information before and after charging may be transmitted to the server, and the server may calculate the amount of power and the charging rate according to the actual charging time, but this is not limitative.

3 is a block diagram showing in detail the configuration of the watt hour meter 200 of FIG.

3, the watt-hour meter 200 may include a main circuit unit 210, a power supply unit 205, a voltage detection unit 201, a current detection unit 203, and a battery unit 207.

The main circuit unit 210 controls the overall operation of the watt hour meter 200. The power supply unit 205 supplies driving power to the main circuit unit 210. The voltage detection unit 201 detects the voltage of the power supplied from the power supply 180 to the load 190. [ The current detection unit 203 detects a current of electric power supplied from the power supply 180 to the load 190. [

The battery unit 207 supplies driving power to the main circuit unit 210 when the power supply unit 205 is not normally operated, such as a power failure.

The main circuit unit 210 includes an analog-to-digital conversion unit 212, a signal processing unit 214, an output unit 218, a storage unit 220, a display unit 222, a communication unit 226, an input unit 224, 216). The output unit 218 may be, but not limited to, the output device 170 shown in FIG.

The analog-to-digital converter 212 converts the analog signals detected by the detectors 201 and 203 into digital signals. The signal processing unit 214 processes the converted digital signal. The output unit 218 outputs the processed result. The storage unit 220 stores the processed result. The display unit 222 displays the processed result. The display unit 222 may be provided with a touch input function. Therefore, the display unit 222 can recognize the touch on the screen of the display unit 222 as an input signal. The input unit 224 receives data from the outside. The communication unit 226 communicates with the outside. The control unit 216 controls the overall operation of the main circuit unit 210.

Hereinafter, the function of each configuration will be described in more detail.

The power supply unit 205 receives power from the power supply 180 under the control of the controller 216 and supplies driving power for the overall operation of the watt hour meter 200 to the main circuit unit 210. The power supply unit 205 supplies the charging power to the battery unit 207 under the control of the control unit 216. [

The voltage detector 201 detects the voltage of the power supplied from the power source 180 to the load 190 and transmits the detected analog voltage signal to the analog-to-digital converter 212.

The current detector 203 detects the current of the power supplied from the power source 180 to the load 190 and transmits the detected analog current signal to the analog-to-digital converter 212.

The analog-to-digital conversion unit 212 converts the analog voltage and / or current signal detected from the voltage detection unit 201 and / or the current detection unit 203 into a digital signal and transmits the digital signal to the signal processing unit 214.

The signal processing unit 214 receives the converted digital signal, calculates a digital current and a voltage value from the received digital signal as an instantaneous power amount, and transmits the calculated instantaneous power amount to the control unit 216.

The output unit 218 may output the accumulated amount of power under the control of the control unit 216, output data to the connected external device, and convert the cumulative energy amount into a pulse signal in accordance with the output data.

The storage unit 220 stores data necessary for control or stores input and output data and communication data under the control of the control unit 216. [ In addition, the storage unit 220 may store a program for each signal processing and control in the controller 216, or may store the signal processed data signal.

For example, the storage unit 220 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory XD memory, etc.), RAM, ROM (EEPROM, etc.), and the like.

The display unit 222 may display the current amount of power under the control of the control unit 216 or may display the control state and the power supply state of the control unit 216. [ Also, the display unit 222 can display information necessary for the electric vehicle user, selection information that the electric vehicle user can select, and the like. The display unit 222 can display the charged state or the discharged state of the battery unit 207 under the control of the control unit 216. [ The display unit 222 may be not only an analog display but also a PDP, an LCD, an OLED, a flexible display, a 3D display, and the like.

The input unit 224 is used when the watt-hour meter 200 is controlled by using an external device. The input unit 224 receives an external control data and performs an interface for transmitting the control data to the control unit 216.

The communication unit 226 communicates with an external device under the control of the control unit 216 and the control unit 216 can transmit and receive data such as preset time information or power failure through the communication unit 226 to the outside.

The communication unit 226 may include an Ethernet terminal or the like for connection to an external wired network and may be a WLAN (Wireless LAN) (Wi- Fi wireless broadband (Wibro), World Interoperability for Microwave Access (Wimax), and HSDPA (High Speed Downlink Packet Access) communication standards.

Also, the communication unit 226 can perform short-range wireless communication with other electronic devices.

The watt-hour meter 200 may be implemented by, for example, Bluetooth, Radio Frequency Identification (RFID), infrared data association (IrDA), Ultra Wideband (UWB), ZigBee, Digital Living Network Alliance May be networked with other electronic devices in accordance with the communication standard of

The control unit 216 controls the overall operation of the watt hour meter 200 and controls the input / output digital signals.

The control unit 216 receives the charging information from the main processing board 150 and receives the electric power supply and demand status information from the outside, for example, the Korea Power Exchange using the communication unit 226, And generates induction information for inducing to a period other than the peak time period in the case of the power use peak time period, and displays the induction information on the display unit 222. The peak time zone may be, for example, between 2 and 5 hours, but is not limited thereto. Since the peak time period may vary from day to day even in the peak season, it may be set periodically from the Korea Power Exchange (KPS), for example, by providing a peak time zone on a weekly basis.

The power supply / demand status information may include, but is not limited to, normal, preparation, attention, attention, boundary, severity, etc., depending on the magnitude of the reserve power.

The induction information may include rapid charge / full charge selection information, charge unit price information of peak time, charge unit price information of non-peak time, information on expected charge time, and the like, but the invention is not limited thereto.

The electric vehicle user can select a charging method suitable for his / her own based on such guidance information.

For example, when the price of the peak hour is set to be three times or more higher than the price of the non-peak hour, the electric vehicle user can charge the peak time zone by rapid charging instead of the peak time zone, The electric vehicle charging station 20 may be recharged at a non-peak time zone, or may be charged again at a non-peak time period. Therefore, the electric power supply and demand status of the peak time zone can be drastically improved by inducing the electric vehicle user to perform the slow charge instead of the rapid charge at the peak time zone or to induce the electric charge to be charged at the non-peak time zone.

In the future, it is estimated that electricity usage for charging an electric vehicle is explosive when the whole country owns the electric vehicle. In such a situation, when a large number of electric vehicle users simultaneously charge the electric vehicle at the peak time of the peak season, the state of blackout can not be avoided.

Therefore, the embodiment can lead to avoid charging of the peak time zone, thereby improving the power supply and demand status.

On the other hand, when the accumulated power amount is requested from the main processing board 150, the controller 216 accumulates the amount of power generated and processed by the signal processor 214 and transmits the accumulated power amount to the main processing board 150 have.

4 is a flowchart illustrating a control method of the watt hour meter 200 according to the present invention.

2 to 4, a cord set cable is first fastened to the electric vehicle 10 by the user of the electric vehicle 10 or the staff of the electric vehicle charging station 20 (S311).

When the cordset cable is fastened to the electric vehicle 10, the main processing board 150 receives information of the electric vehicle 10, such as identification and card information, through the pilot communication 140, (10) to the host system via the communication board (160). The host system authenticates the electric vehicle 10 based on the information of the electric vehicle 10 and transmits the result to the main processing board 150. [

When the main processing board 150 receives the authentication result of the electric vehicle 10, it transmits the charging information to the watt hour meter 200. Accordingly, the control unit 216 of the watt-hour meter 200 receives the charging information (S313). The charging information may include the identifier of the electric vehicle 10 and the remaining amount information of the electric vehicle 10 battery.

In addition, the control unit 216 receives the power supply / demand status information from the Korea Power Exchange through the communication unit 226 (S315). The power supply status information can be transmitted in real time or periodically.

For example, the electricity supply and demand status information is transmitted once a day in a season where electricity usage is low. However, when the electricity usage is high in the peak season, the electricity supply and demand status information may be transmitted every hour or every 30 minutes.

The control unit 216 determines whether the current time is a peak time zone (S317).

If the current time is a peak time zone, the controller 216 generates guidance information based on the charging information and the power supply / demand status information, and displays the generated guidance information through the display unit 222 (S319).

When the current time is the peak time zone, the controller 216 calculates the charging amount and the estimated charging time to determine the corresponding charging mode, for example, the peak time zone mode and the non-peak time zone mode. Can be viewed through the display unit 222 as shown.

5B, the control unit 216 informs that the current peak time zone and the corresponding charge balance are higher than the non-peak time zone, as shown in FIG. 5 (b) Guidance information including the type can be displayed on the display unit 222. [

If the current time is not the peak time zone, charging can be performed immediately without going through the process of S319 to S323 (S329).

A desired charge type can be selected by referring to the guidance information displayed on the display unit 222 by the user (S321).

The charging types included in the guidance information include time saving type, cost saving type, direct charging time type type, and minimum type.

The time saving type is a type that can be charged in the shortest period by the buffering method, and the charging cost is the most expensive. This type of charge can be selected if you want to charge as soon as possible, even at the peak time of the user.

The cost saving type is less expensive than the time saving type. This type of charge can be selected if you want to diminish the charge cost by allowing the user to keep the current charge time longer than the current peak time but allow it to charge at a non peak time after the peak time.

For example, if the charging peak time zone is 3 hours from 2:00 to 5:00, and the current time is 3:00, if the user selects the cost saving type and is charged, the charging time is 2 hours from 3:00 to 5:00 at the peak time 4 hours from 5:00 to 9:00 will be charged in non-peak hours. Therefore, the cost-saving type reduces the charging current by allowing long charging over the peak time period and the non-peak time period, so that the power consumption can be reduced accordingly, thereby preventing an increase in power supply and demand.

The direct charging time entry type allows the user to directly enter the desired charging time when the time saving type and the cost saving type do not match the user's preference.

For example, as shown in Fig. 5 (e), when charging is performed for four hours by the user, a charging charge and confirmation button for four hours are displayed as shown in Fig. 5 (f). When a selection command for the confirmation button is input from the user, the charge may be charged for 4 hours and the charging fee of 30,000 won.

Task Note: As a result of the inventor's identification, we have removed the statement that the minimum button is not needed.

On the other hand, the control unit 216 may display a message 'Please disconnect the cord set cable from the electric vehicle 10', for example, on the display unit 222.

Referring to FIG. 4, if a selection command for a specific charge type among a plurality of charge types is input from the user, the controller 216 may perform charging according to the specific charge type selected by the user (S323).

At this time, although not shown, the controller 216 transmits the charge type information selected by the user to the main processing board 150, and the main processing board 150 transmits the charge type information to the host system 150 through the communication board 160 As shown in FIG. When charging is completed later, the host system can charge a charging fee for the electric vehicle 10 based on the charging type information.

The main processing board 150 connects the system power source and the electric vehicle 10 through the magnetic switch based on the selected charge type information. Thereby, electric power of the system power supply is supplied to the electric vehicle 10. At this time, a voltage signal and a current signal of electric power are detected from each of the voltage detecting unit 201 and the current detecting unit 203, and the voltage and current signals are converted into digital signals by the analog-digital converting unit 212, 214 to process the digital signal, and the watt-hour meter 200 is measured and transmitted to the control unit 216.

The control unit 216 accumulates the amount of electric power that is processed in real time by the signal processing unit 214 in the watt hour meter 200 while the electric vehicle 10 is being charged.

The control unit 216 may display a notification message informing that the electric vehicle 10 is currently 'charging' through the display unit 222 as shown in FIG. 5 (c) while the electric vehicle 10 is being charged.

The control unit 216 confirms whether charging is completed (S325). That is, the control unit 216 confirms whether the selected time elapses based on the charge type information selected by the user, and notifies the main processing board 150 of the elapsed time. The elapse of the time may mean that charging of the electric vehicle 10 is completed.

The control unit 216 may display a notification message indicating that the 'charge completion' is currently being performed through the display unit 222 as shown in FIG. 5 (d).

The main processing board 150 disconnects the power connection between the system power supply and the electric vehicle 10 via the magnetic switch when the selected time has elapsed. Then, the cord set cable is disconnected from the electric vehicle 10 by the user of the electric vehicle 10 or the staff member of the electric vehicle charging station 20 (S327).

As described above, the induction information is provided in advance to the user who intends to charge in the peak time period of the peak season, thereby inducing the user to avoid the peak time zone, and the charging time can be lengthened, The increase in power supply and demand can be prevented.

By inducing all electric vehicle users in the power use peak time zone, considerable national power consumption is reduced, thereby preventing national emergency or power outage due to increased power supply and demand.

The foregoing detailed description should not be construed in all aspects as limiting and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

10: electric vehicle 20: electric vehicle charging station
201: voltage detection unit 203: current detection unit
205: power supply unit 207: battery unit
210: main circuit section 212: analog-to-digital conversion section
214: signal processor 216:
218: output unit 220: storage unit
222: display section 224: input section
226:

Claims (8)

Generating induction information including a plurality of charging types based on the charging information of the electric vehicle and the electric power supply and demand status information,
A controller for performing charging according to the specific charging type when a specific charging type is selected among the plurality of charging types; And
And a display unit for displaying the guidance information. The method according to claim 1,
Wherein the charging information includes an identifier of the electric vehicle and information on a remaining amount of the battery of the electric vehicle. The method according to claim 1,
The power supply / demand status information is received from the outside in real time or periodically. The method according to claim 1,
The guidance information may include:
A wake-up meter further comprising a message indicating that the current peak time zone and the corresponding charge rate are higher than the non-peak time zone. The method according to claim 1,
The charging type includes a time-saving, cost-saving and direct charging time entry type watt-hour meter. 6. The method of claim 5,
Wherein the time-saving type is charged at a peak time. 6. The method of claim 5,
Wherein the cost saving type is charged over a peak time period and a non-peak time after the peak time period. 6. The method of claim 5,
Wherein the guidance information further comprises a minimum button,
Wherein the controller is configured to minimize charging when a selection command for the minimum button is input.

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