KR101850025B1 - Apparatus for managing energy of electric vehicle and method thereof - Google Patents

Abstract

An apparatus and method for managing energy of an electric vehicle according to the present invention are disclosed.
An apparatus for managing energy of an electric vehicle according to the present invention includes: a communication unit for receiving power information on a smart grid that supplies electric power from a charger; The amount of charge energy required for charging mode is calculated by using the power information, the user schedule information, and the surplus energy amount, A charge controller for controlling the amount of surplus energy within the required amount of charge energy to be sold within a time band in which the maximum amount of charge per unit time can be sold; And a storage unit for storing the power information, battery status information, schedule information of the user, and V2G information.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for managing energy of an electric vehicle,

The present invention relates to an energy management method for an electric vehicle, and more particularly, to an energy management method for an electric vehicle in which a required amount of energy is charged to a battery within a time band that can be charged with a minimum electric power charge per unit time, The present invention relates to an apparatus and method for managing the energy of an electric vehicle, which can be sold within a time band that can be sold at the highest electric power rate per unit time.

Recently, electric vehicles and plug-in hybrid electric vehicles have been attracting attention as future vehicles for solving environmental problems and energy resources.

The electric power for charging the battery of the electric vehicle is partially supplied by the regenerative braking and the generator driving from the engine. However, in order to activate the electric vehicle and the plug-in hybrid electric vehicle, electric power is supplied from the national power grid or the distributed electric power source Should be.

On the other hand, when electric vehicles and plug-in hybrid electric vehicles are used for commuting, the pattern of driving in the morning and charging in the evening has a bad effect on the national grid or distributed power in a certain period of time and increases the maximum power consumption of the grid.

This is the amount that is matched to the maximum power consumption. In the present power system, which has a reserve ratio of about 10% if more power is used, additional power generation equipment is required and energy is inefficient due to the abandonment of electricity during inactivity time.

Recently, a Smart Grid system has been established to intelligentize the power grid for energy efficiency and energy saving. Apart from the vertical system in which electricity was unilaterally supplied from the center, a bi-directional supply system such as a micro grid and a distributed power system is provided .

At the core of the Smart Grid system is a combination of information and communication technologies such as zigbee and power line communication in the power grid, allowing consumers and utilities to exchange information in real time. If necessary, the charged energy can be resold to the Smart Grid.

However, the technology for charging the battery of an existing electric vehicle can be accomplished by manually charging the battery immediately or by manually selling the energy regardless of the electric charge, so that the energy required for charging can be charged at an inexpensive time, It is difficult to carry out smart energy management such as sales.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for calculating a required energy amount according to a user's schedule, And to charge the battery within the calculated chargeable time band, and a method for managing the energy of an electric vehicle.

Another object of the present invention is to provide a method and apparatus for calculating a predetermined surplus energy within a required amount of energy by using power information to calculate a time band that can be sold at a highest power rate per unit time and to sell surplus energy within the calculated time- An apparatus for managing energy of an electric vehicle, and a method thereof.

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

In order to achieve the above objects, an apparatus for managing energy of an electric vehicle according to an aspect of the present invention includes: a communication unit for receiving power information on a smart grid for supplying power from a charger; Wherein the control unit calculates the required amount of charged energy using the power information, the user schedule information, and the surplus energy amount, and charges the battery in a time band in which the required amount of charged energy can be charged with a minimum power rate per unit time, A charge controller for controlling the amount of the surplus energy within the required charge energy amount to be sold in a time band in which the maximum chargeable electricity cost per unit time can be sold; And a storage unit for storing the power information, the battery status information, the schedule information of the user, the charging information, and the V2G information.

Preferably, the battery status information indicates type information of a battery for selecting a minimum energy amount, a rated power, a constant current charge, or a constant voltage charge selection for preventing a battery's current energy amount and a battery performance from deteriorating, The charging information represents the chargeable time band, the voltage, the current, and the energy source, and the V2G information represents the amount of surplus energy, the available time band .

Preferably, the charge controller sets a charge energy amount based on the battery state information, the user schedule information, and the surplus energy amount, and then, using the set charge energy amount and the power information, Calculates a power band for each time slot, calculates a time band that can be charged with a minimum power rate according to the calculated result, and charges the battery within the calculated chargeable time band.

Preferably, the charge control unit calculates a time-based power rate within the recommended time-of-sale band using the surplus energy amount and the power information, calculates a time zone available for selling at the highest power rate according to the calculated result, The surplus energy amount can be provided to the smart grid within the available time zone of sale.

Advantageously, said chargeable time zone and said salable time zone may comprise a plurality of time bands.

According to another aspect of the present invention, there is provided a method for managing energy of an electric vehicle, the method comprising: receiving power information for a smart grid supplying electric power from a charger; When the operation mode is the charging mode, the battery is charged into the battery within the time band in which the required charging energy calculated using the power information, the battery status information, the user schedule information, and the surplus energy amount can be charged with the minimum power rate per unit time step; And selling, when the operation mode is the sales mode, the surplus energy amount within a time band in which sales can be performed at the highest power rate per unit time.

Preferably, the battery status information indicates type information of a battery for selecting a minimum energy amount, a rated power, a constant current charge, or a constant voltage charge selection for preventing a battery's current energy amount and a battery performance from deteriorating, The required amount of energy corresponding to the distance or time to be traveled by the time zone may be represented according to the schedule of FIG.

Preferably, the charging step sets the amount of charge energy based on the battery state information, the user schedule information, and the amount of surplus energy, and then sets the amount of charge energy in the charge recommended time zone And calculates a chargeable time band with a minimum power charge according to a result of the calculation, and charges the battery within the calculated chargeable time band.

Preferably, the selling step calculates a time-based power rate within a recommended selling time band using the surplus energy amount excluding the required amount of charged energy and the power information, and can sell the power rate according to a result of the calculation And can provide the surplus energy amount to the smart grid within the calculated salesable time band.

Advantageously, said chargeable time zone and said salable time zone may comprise a plurality of time bands.

Accordingly, the present invention calculates a required energy amount according to the amount of energy for maintaining battery performance and a user's schedule, calculates a chargeable time band with a minimum power rate per unit time based on the calculated amount of energy and power information There is an effect that the battery can be charged at a low cost by charging the battery within the calculated chargeable time band.

According to the present invention, a predetermined surplus energy within a necessary amount of energy is calculated based on a user's schedule, a time band in which the predetermined surplus energy can be sold at the highest power rate per unit time using the power information, and the surplus energy is sold Thereby, the surplus energy of the battery can be effectively utilized.

1 is a block diagram of an apparatus for managing energy according to an embodiment of the present invention.
Fig. 2 is a view showing a detailed configuration of the charging apparatus 100 shown in Fig.
FIG. 3 is a view for explaining an energy charge by time according to an embodiment of the present invention.
4 is a diagram illustrating a method for charging a battery according to an embodiment of the present invention.
5 is a diagram illustrating a method for selling surplus energy according to an embodiment of the present invention.

Hereinafter, an apparatus and method for managing energy of an electric vehicle according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5 attached hereto. First, a detailed description will be given centering on parts necessary for understanding the operation and operation according to the present invention. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In the drawings, like reference numerals refer to like elements throughout the specification.

In the present invention, 1) calculating a necessary energy amount considering a user's schedule, calculating a chargeable time band with a minimum electric power charge per unit time based on the calculated amount of energy and electric power information, 2) calculating a time band in which the surplus energy other than the required energy amount can be sold at the highest electricity rate per unit time using the power information, and selling the surplus energy within the calculated available sales time band I suggest.

1 is a block diagram of an apparatus for managing energy according to an embodiment of the present invention.

As shown in FIG. 1, an apparatus for managing energy of an electric vehicle according to the present invention may include a charging device 100, a charger 200, and a management server 300. Here, the electric vehicle may be an electric vehicle that uses a battery as a driving power source, a plug-in hybrid electric vehicle that uses an internal combustion engine and a battery as driving power sources at the same time.

The charging apparatus 100 is provided in an electric vehicle and can be supplied with electric power corresponding to a required charging amount or a charging energy amount from a charger connected to an intelligent power grid, that is, a smart grid, using a charging cable. Further, the charging apparatus 100 may provide the smart grid with a surplus energy amount other than the required energy amount through the charger.

The charger 200 controls the power supply or the power cutoff so that the charging device 100 and the intelligent power network can be interlocked to supply / cut the electric power from the intelligent power network to / from the electric vehicle or to supply / can do.

The management server 300 may provide power information to the charging device 100. [ Here, the electric power information may include electric power rate information by time slot. The electric power rate information may be an average price, an expected price, etc., and may be changed in real time according to an energy source, date, time,

Fig. 2 is a view showing a detailed configuration of the charging apparatus 100 of the automobile shown in Fig.

2, an automobile charging apparatus 100 according to the present invention includes a charging terminal 110, a communication unit 120, a charging control unit 130, a battery 140, a storage unit 150, and the like .

The charging terminal 110 can receive power using a charging cable connected to the charger. Also, the charging terminal 110 may exchange data with the charger using a charging cable.

The communication unit 120 may receive power information including power charge information. The communication unit 120 may be used to exchange various data in synchronization with the charger. Here, the communication unit 120 can transmit and receive information using various methods such as broadband communication, wire communication, wireless communication, short-range wireless communication such as ZigBee, and power line communication.

The charge control unit 130 may operate in a charge mode and a sales mode as an operation mode. That is, the charging control unit 130 can charge the battery in a time band in which 1) the charging energy amount considering the user's schedule and the required energy and sales can be charged with the minimum power rate per unit time in the charging mode, 2) In the sales mode, the surplus energy other than the required energy amount can be provided to the smart grid in the time band that can be sold at the highest power rate per unit time.

At this time, the required amount of charged energy E _REQ can be defined as the following equation (1).

[Equation 1]

E _REQ = E _BASE + E _SCHEDULE + E _V2G

Here, E _BASE represents the minimum amount of energy to prevent battery degradation, E _SCHEDULE represents the amount of energy required by the user's schedule, and E _V2G can represent the amount of surplus energy that can be sold. The amount of surplus energy E _V2G that can be sold can be changed according to the user's selection.

1) In the case of a charging mode for charging the battery, the charge controller 130 controls the charge energy of the battery based on the battery state information including the current energy amount and the minimum energy amount of the battery, the required energy amount and the surplus energy amount according to the user's schedule, Can be set. The charge control unit 130 calculates a power rate for each time zone within the recommended charging time band using the set charging energy amount and the power information, calculates a chargeable time band with a minimum power rate according to the calculated charging rate, The result can be set as charging information.

The amount of surplus energy can also be set based on the power information.

The charge control unit 130 can charge the battery within the chargeable time band calculated according to the generated charge information. Here, the charge information may include a chargeable time band or a charge time zone, for example, a charge start time, a charge end time, a voltage, a current, an energy source, and the like, under optimal conditions depending on the amount of energy required.

At this time, the chargeable time band can be set by dividing into several time zones according to the amount of energy.

2) In the case of a sales mode for selling energy, the charge control unit 130 calculates a power rate by time zone within the recommended selling time band using the surplus energy amount and the power information excluding the required energy amount, and according to the calculated result It is possible to calculate a time zone available for sale at the highest power rate and set the calculated result as V2G information. Therefore, the charge controller 130 can provide surplus energy to the smart grid within the available time band that is calculated according to the set V2G information. Here, the V2G information may include a time zone or a V2G time zone that can be sold under optimal conditions according to the amount of surplus energy and the amount of surplus energy that can be provided, for example, a sales start time, a sales end time, and the like.

At this time, the available time band can be set by dividing into several time zones according to the amount of energy.

FIG. 3 is a view for explaining an energy charge by time according to an embodiment of the present invention.

Referring to FIG. 3, assuming that the current energy amount is 12 Kwh and the required energy amount is 5 Kwh according to the user's schedule and the minimum energy amount is 10 Kwh, the required amount of charge energy may be 3 Kwh.

The charging control unit 130 calculates a charging rate for each time slot and calculates a chargeable time band, for example, from 0:00 am to 3:00 am, at a minimum power rate according to the calculated charging rate, 3 Kwh.

As another example, if the current energy amount is 12 Kwh and the required amount of energy according to the user's schedule is 5 Kwh, the minimum amount of energy is 10 Kwh, and the amount of surplus energy to be secured for sale is 7 Kwh, the required amount of charging energy may be 10 Kwh .

The charge control unit 130 calculates a power charge for each time zone within the recommended charging time band and calculates a chargeable time band from 0:00 am to 5:00 am according to a result of the calculation at a minimum power charge, And the battery is charged to 10 Kwh within the calculated chargeable time band.

In addition, the charge control unit 130 calculates a power rate for each time zone within the recommended selling time band, calculates a time zone from 9:00 am to 3:00 pm that can be sold at the highest power rate according to the calculated result, The surplus energy in the V2G time band is sold by 7 Kwh.

In addition, the charge controller 130 may perform user authentication with the charger to authenticate whether the user is a legitimate user. That is, the charge control unit 130 can perform the operation of charging the battery or selling the energy after the user authentication with the rechargeable battery is successful.

The battery 140 can be used as a power source for driving a motor which is a drive power of an electric vehicle.

The storage unit 150 may store battery status information, power information, user schedule information, charging information, and V2G (Vehicle to Grid) information as information necessary for battery charging and energy sales.

Herein, the battery status information represents the current energy amount of the battery and the minimum energy amount for preventing deterioration of the battery, the rated power, the type information of the battery for the constant current charging or the constant voltage charge selection, The required amount of energy corresponding to the distance or time to travel according to the schedule up to a predetermined or next chargeable day, and the like.

4 is a diagram illustrating a method for charging a battery according to an embodiment of the present invention.

As shown in FIG. 4, the charging apparatus according to the present invention can confirm whether it is connected to a charger (S410). When the charging device is connected to the charger, user authentication can be performed using a user ID (Identifier) through the connected charger (S420).

Next, when the user authentication is successful, the charging device can receive power information from the charger (S430).

Next, the charging device can set the charging energy amount in consideration of the battery state information including the current energy amount and the minimum energy amount of the battery, the user schedule information, the power information including the power rate by time slot, and the surplus energy amount (S440 ).

Next, the charging device calculates power charges by time in the recommended charging time band using the set charging energy amount and the power information including the power charges by the time of day, and according to the calculation result, (S450).

Next, the charging device can determine whether the current time is a rechargeable time zone or a charging time zone (S560), and control the charging device to automatically charge the battery within the rechargeable time band as a result of the determination (S460).

This is explained in detail as follows. First, the charging device can determine whether the current time coincides with the charging start time of the rechargeable time band. That is, if the current time matches the charging start time as a result of the determination, the charging apparatus can request the charger to start charging the battery and start charging the battery.

The charging device can determine whether the charged amount of the battery exceeds the charged energy amount. That is, if the charging device does not exceed the charging energy amount as a result of the determination, the charging device can continuously charge the battery. On the other hand, as a result of the determination, if the amount of charge of the battery exceeds the amount of charge energy, the charging device can immediately end the charging of the battery.

And the charging device can determine whether the current time coincides with the charging end time of the rechargeable time band. That is, if the current time matches the charging end time, the charging device can request the charging device to terminate the charging of the battery and terminate the charging of the battery. On the other hand, if the current time does not coincide with the charging end time as a result of the determination, the charging device can continuously charge the battery.

The above process can be repeatedly performed when the charging information is divided into several charging time zones.

5 is a diagram illustrating a method for selling surplus energy according to an embodiment of the present invention.

As shown in FIG. 6, after the charging apparatus according to the present invention is connected to the charger, the operator can receive a request for selling energy (S510). That is, when the charging device is requested to sell the energy, the charging device can perform user authentication using the connected charger and the user ID (S520).

Next, if the user authentication is successful, the charging device can receive power information from the charger (S530).

Next, the charging apparatus calculates a time-based power rate using the power information and the surplus energy amount, and calculates a time zone available for selling at the highest power rate according to the calculated power rate, and stores the calculated time period as V2G information (S540).

Next, the charging device determines whether the current time is a sellable time zone or a V2G time zone (S550). As a result of the determination, the recharging device determines surplus energy in the V2G time zone after the surplus energy is secured, Energy can be sold (S560). That is, the charging device can provide surplus energy to the smart grid.

This is explained in detail as follows. The charging device can determine whether the current time coincides with the sales start time of the available time zone. That is, if the current time corresponds to the sales start time as a result of the determination, the charging device can start supplying energy to the smart grid by requesting the charger to start selling energy.

And the charging device can determine whether the current time coincides with the sales end time of the available time zone. That is, if the current time is equal to the sales completion time, the charging apparatus can terminate the supply of energy to the smart grid by requesting the charger to terminate sales of the energy. On the other hand, if the current time does not coincide with the sales end time as a result of the determination, the charging device can continuously perform sales of energy.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: Charging device
110: Charging terminal
120:
130:
140: Battery
150:
200: Charger
300: management server

Claims (10)

A communication unit for receiving power information on a smart grid supplying power from a charger;
The time required to charge the required amount of charged energy with a minimum power rate per unit time is calculated as charging information in the case of the charging mode, while calculating the necessary amount of charged energy in consideration of the power information, battery information, user schedule information, And sets the time band in which the amount of surplus energy within the required charging energy amount in the sales mode as the highest power rate per unit time as V2G information and sells the energy according to the V2G information A charge control unit for controlling the charge control unit; And
And a storage unit for storing the power information, the battery information, the schedule information of the user, the charging information, and the V2G information,
The charge control unit sets the amount of charge energy based on the battery information, the user schedule information, and the surplus energy amount, and then uses the set amount of charge energy and the power information to calculate power Calculating a charge and calculating a chargeable time band with a minimum electric power charge according to the calculated result, and charging the battery within the calculated chargeable time band.
The method according to claim 1,
Wherein the battery information includes at least one of a current energy amount of the battery and at least one of a minimum energy amount for preventing deterioration of the battery, a rated power, and a type information of a battery for constant current charging or constant voltage charging selection. For managing the energy of the battery.
The method according to claim 1,
The user schedule information indicates a required energy amount including energy corresponding to a distance or time to be moved according to a user's schedule, the charging information indicates a chargeable time band, a voltage, a current, and an energy source, and the V2G information indicates a surplus energy amount , ≪ / RTI > which represents a time zone available for sale.
delete The method according to claim 1,
The charging control unit calculates a time zone power rate within the recommended selling time band using the surplus energy amount and the power information, calculates a time zone available for selling at the highest power rate according to the calculated result, And providing said surplus energy amount to the smart grid within a time zone available for sale.
Receiving power information for a smart grid supplying power from a charger;
Charging the battery in a time band in which the required charge energy calculated using the power information, the battery information, the user schedule information, and the surplus energy amount can be charged with the minimum power rate per unit time when the operation mode is the charge mode, ; And
Selling the surplus energy amount within a time band in which sales can be performed at a highest power rate per unit time when the operation mode is the sales mode,
The step of charging comprises:
Setting a charging energy amount based on the battery information, the user schedule information, and the surplus energy amount;
Calculating a power rate by time zone within the recommended charging time band using the set charging energy amount and the power information and calculating a chargeable time band with a minimum power rate according to the calculated charging rate; And
And charging the battery within the calculated chargeable time band. ≪ Desc / Clms Page number 19 >
The method according to claim 6,
Wherein the battery information indicates type information of a battery for selecting a minimum energy amount, a rated power, a constant current charge, or a constant voltage charge selection for preventing a current energy amount of the battery and degradation of the battery, .
The method according to claim 6,
Wherein the user schedule information indicates a required energy amount corresponding to a distance or time to be moved by time according to a user's schedule.
delete The method according to claim 6,
Wherein the selling comprises:
Calculating a time zone power tariff within a recommended selling time band using the surplus energy amount excluding the required amount of charged energy and the power information and calculating a time zone available for selling at the highest power tariff according to the calculated result; And
And providing an amount of surplus energy to the smart grid within the calculated salable time band.

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