KR20150108141A - Cable installment type charging control apparatus and method thereof - Google Patents

Abstract

A cable installed charging control device, capable of coupling to a grid-side cable assembly having an allowable current indicating capacitor, includes: an electric vehicle-side cable assembly coupled to an electric vehicle; a connector coupled to the grid-side cable assembly; and an allowable current sensing unit for generating a pulse signal having a pulse width according to a charging velocity of the allowable current indicating capacitor by charging the allowable current indicating capacitor, and determining allowable current of the grid-side cable assembly based on the pulse width.

Description

[0001] CABLE INSTALLMENT TYPE CHARGING CONTROL APPARATUS AND METHOD THEREOF [0002]

The present invention relates to charging an electric vehicle.

An electric vehicle is an automobile that is operated by electricity. The electric vehicle can be classified into a pure electric vehicle (Batttery Powered Electric Vehicle) and a hybrid electric vehicle (Hybrid Electric Vehicle). Here, a pure electric vehicle is an automobile that travels only by using electricity without using fossil fuel, and is generally called an electric vehicle. And hybrid electric vehicles are meant to run on electricity and fossil fuels. Such an electric vehicle is provided with a battery for supplying electricity for running. Particularly, a pure electric vehicle and a plug-in type hybrid electric vehicle charge a battery using electric power supplied from an external power source and drive an electric motor using electric power charged in the battery.

Electric vehicle charging cable assemblies are used when charging an electric vehicle using commercial grid power of 60 Hz provided by a socket provided in a home or the like.

The electric vehicle charging cable assembly includes a connector connected to the electric vehicle and a plug connected to the socket, and a power line connecting the connector and the plug.

Since the electric vehicle charging cable assembly is used in various environments, a cable-type charging control device that provides stable charging of the electric vehicle can be provided in the electric vehicle charging cable assembly. The cable-installed type charge control device is attached to the power line integrally with the power line so as not to be easily separated from the power line by the user. In order for the cable-type charge control device to provide stable charging of the electric vehicle, it is necessary that the cable-type charge control device itself satisfies the requirements that are resistant to external temperature, external humidity, vibration, shock and the like. When the cable-mounted type charge control device includes a connector for wire communication, the connector includes a metal terminal, so that the cable-type charge control device can no longer satisfy the aforementioned requirements.

However, since the user has a desire to check the state of charge, the cable-type charge control device attached to the electric vehicle charge cable assembly as a unit needs to inform the user of the charge state.

To this end, the cable-type charge control device displays information on charging or failure information through LEDs of a predetermined color.

That is, the user can acquire the charge-related information only by looking directly at the cable-type charge control device. In general, the user may want to check the charging status in a rainy, cold or hot weather. However, the fact that it is necessary to go outside in such a weather condition and directly observe the cable-type charge control device is a serious inconvenience to the user.

Different types of wall sockets are used in different countries. This also necessitates a change in the type of plug that is coupled to the wall socket. In particular, in Europe, cars are crossing the border. In many countries, plug replacement is required to charge electric vehicles.

Replacement of the cable-mounted charge control device itself for plug replacement is costly and inefficient. Thus, there is a demand that the grid-side charging cable assembly is designed to be detachable and engageable with a cable-type charging control device.

However, since charge currents are defined for each country, allowable currents of the grid-side charge cable assemblies vary from country to country.

At this time, if the cable-type charge control device can not detect the allowable current of the grid-side charge cable assembly, there is a problem that it may cause errors such as a fire or a machine failure.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cable-type charge control apparatus which is capable of easily detecting an allowable current of a cable assembly coupled with the cable-type charge control apparatus and performing a charge operation based thereon.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system, an apparatus, and a method for providing electric vehicle charging related information conveniently to a user.

In one embodiment, a cable-mounted charge control device capable of engaging with a grid-side cable assembly having an allowable current indicating capacitor comprises: an electric vehicle-side cable assembly coupled with the electric vehicle; A connector coupled to the grid-side cable assembly; And a permissible current sensing unit for charging the allowable current indicating capacitor to generate a pulse signal having a pulse width corresponding to the charging rate of the allowable current indicating capacitor and for determining a permissible current of the grid side cable assembly based on the pulse width .

Wherein the allowable current sensing unit comprises: a comparator for comparing the voltage charged in the allowable current indicating capacitor and the reference voltage to generate the pulse signal; and a pulse width measuring unit And a permissible current determiner for determining a permissible current of the grid side cable assembly based on the pulse width.

The cable-type charge control device includes a power terminal connected to the power terminal of the grid-side cable assembly; A signal terminal connected to a signal terminal of the grid side cable assembly; And an AC-DC converter for converting the grid AC power flowing into the power terminal into an operation DC voltage.

The resistor may charge the allowable current indicating capacitor using the operating DC voltage.

And the signal terminal of the grid side cable assembly is connected to the signal terminal of the cable installation type charge control device after the power terminal of the grid side cable assembly is connected to the power terminal of the cable installation type charge control device, May be provided.

The allowable current sensing unit may determine the allowable current of the grid side cable assembly based on the pulse width using a lookup table.

A cable-mounted charge control device includes: a relay for controlling a connection between the electric vehicle-side cable assembly and the grid-side cable assembly; The relay is turned on to charge the electric vehicle, and information on the allowable current of the grid-side cable assembly is provided to the electric vehicle so that the electric vehicle can charge the battery So that the user can charge the battery.

The controller may measure the charge current and turn off the relay if the charge current exceeds the allowable current.

The cable-mounted type charge control apparatus may further include a communication unit for communicating with the add-on communication apparatus attached to the cable-type charge control apparatus.

The control unit may notify the terminal device that the charge current has exceeded the allowable current through the add-on communication communication device through the communication unit.

In one embodiment, a cable-mounted charge control apparatus connectable to a grid-side cable assembly having a signal terminal coupled to one end of the first capacitor includes: a power terminal through which grid alternating current flows; A signal terminal connected to a signal terminal of the grid side cable assembly; A resistor having one end connected to the signal terminal; And a permissible current sensing part for generating a pulse signal based on the voltage of the signal terminal and determining a permissible current of the grid side cable assembly based on the pulse width of the pulse signal.

The embodiment of the present invention enables the cable-mounted charge control device to detect the allowable current of the grid-side charge cable assembly, thereby enabling replacement of the grid-side charge cable assembly while preventing fire and machine malfunction.

Further, the embodiment of the present invention maintains the characteristics of a cable-installed type charge control apparatus manufactured to have characteristics such as resistance to external temperature, external humidity, vibration, impact, etc., facilitates repair of the cable- It is possible to conveniently provide electric vehicle charging related information to the user without causing an increase in the cost burden when the installation type charge control device is replaced.

1 is a conceptual diagram of a charging system for an electric vehicle according to an embodiment of the present invention.
2 is a block diagram of an electric vehicle according to an embodiment of the present invention.
3 is a block diagram of an electric vehicle charging cable assembly in accordance with an embodiment of the present invention.
4 is a block diagram of a sensing unit according to an embodiment of the present invention.
5 is a block diagram of a terminal device according to an embodiment of the present invention.
6 is a ladder diagram illustrating an operation method of an electric vehicle charging system according to an embodiment of the present invention.
7 is a conceptual diagram of a charging system for an electric vehicle according to another embodiment of the present invention.
8 is a block diagram of an electric vehicle charging cable assembly in accordance with another embodiment of the present invention.
9 is a block diagram of an add-on communication apparatus according to an embodiment of the present invention.
10 is a ladder diagram showing an operation method of an electric vehicle charging system according to another embodiment of the present invention.
11 is a ladder diagram showing an operation method of an electric vehicle charging system according to another embodiment of the present invention.
12 shows a cable-type charge control apparatus and a sub-cable assembly including a detailed configuration of an allowable current sensing unit according to an embodiment of the present invention.
FIG. 13 is a flowchart illustrating a method of sensing the allowable current according to an embodiment of the present invention.
FIG. 14 is a signal waveform diagram in an allowable current sensing unit according to an embodiment of the present invention.

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

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), navigation and the like. However, it will be understood by those skilled in the art that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to a mobile terminal.

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

1 is a conceptual diagram of a charging system for an electric vehicle according to an embodiment of the present invention.

1, an electric vehicle charging system 10 according to an embodiment of the present invention includes an electric vehicle 100, an electric vehicle charging cable assembly 20, a socket 30, and a terminal device 300 do.

The socket 30 provides an alternating current (AC) power supply provided by the grid.

The electric vehicle 100 is connected to the socket 30 through the electric vehicle charging cable assembly 20 and is supplied with AC power from the socket 30. [

Electric vehicle charging cable assembly 20 transfers AC power from socket 30 to electric vehicle 100.

The electric vehicle charging cable assembly 20 includes a cable-mounted charge control device 200, an electric vehicle connector 51, an EV-side power cable 53, a plug 65, and a grid- And a grid-side power cable 63.

An EV-side power cable 53 and a grid-side power cable 63 transmit electric power.

The electric vehicle connector 51 may be inserted into the electric vehicle inlet 120, combined with the electric vehicle inlet 120, and may conform to the SAE J1772 standard.

The plug 65 is inserted into the socket 30 and engages with the socket 30.

The cable-type charge control device 200 monitors the charge of the electric vehicle 100, provides charging related information acquired through monitoring to the terminal device 300, and controls charging of the electric vehicle 100.

In the embodiment, the cable-installed charge control device 200 is integrally attached to the electric power line 53 so as not to be easily separated from the electric motor-side electric power line 53 by the user, , Impact and the like.

In an embodiment, the cable-mounted charge control device 200 may include a connector such that it can be coupled to and disconnected from the electric vehicle-side power line 53 by the user. At this time, the connector needs to have characteristics that are resistant to external temperature, external humidity, vibration, shock, and the like.

In the embodiment, the cable-type charge control device 200 is integrally attached to the power line 63 so as not to be easily separated from the grid-side power line 63 by a user, Impact and the like.

In an embodiment, the cable-mounted charge control device 200 may include a connector such that it can be coupled to and disconnected from the electric vehicle-side power line 63 by the user. At this time, the connector needs to have characteristics that are resistant to external temperature, external humidity, vibration, shock, and the like.

When the cable-installed charge control device 200 is provided with a connector for wire communication, the connector may include a metal terminal, so that it may be vulnerable to external environment. In order to solve such a problem, the cable-installed charge control device 200 can wirelessly transmit charge-related information to the terminal device 300. [

The terminal device 300 wirelessly communicates with the electric vehicle charging cable assembly 20 in a non-contact manner to display information about the electric vehicle charging cable assembly 20.

2 is a block diagram of an electric vehicle according to an embodiment of the present invention.

The electric vehicle 100 includes a battery 110, a battery charging device 115, an electric vehicle inlet 120, a communication unit 130, and a control unit 140.

The battery 110 provides electric power for driving the electric vehicle 100 to the electric vehicle 100.

The electric vehicle inlet 120 is a connector for receiving electric power for charging the battery 110 from the outside. The electric vehicle inlet 120 may comply with the SAE J1772 standard.

The battery charging device 115 charges the battery 110 using electric power provided through the electric vehicle inlet 120. [

The communication unit 130 may communicate with the electric vehicle charging cable assembly 20 or the terminal device 300.

The control unit 140 controls the overall operation of the electric vehicle 100.

3 is a block diagram of an electric vehicle charging cable assembly in accordance with an embodiment of the present invention.

The electric vehicle charging cable assembly 20 includes a cable-mounted charge control device 200, an electric vehicle-side power cable assembly 50, and a grid-side power cable assembly 60.

Hereinafter, the electric vehicle-side power cable assembly 50 and the grid-side power cable assembly 60 may be referred to as sub-cable assemblies.

The electric vehicle side power cable assembly 50 includes an electric vehicle connector 51, an electric vehicle side electric power line 53, and an electric vehicle side data communication line 55.

The grid-side power cable assembly 60 includes a connector 61, a grid-side power line 63, and a plug 65.

The cable-type charge control apparatus 200 includes a connector 205, a relay 220, a sensing unit 230, an electric vehicle communication unit 240, a terminal communication unit 250, a storage unit 260, and a control unit 270 .

The connector 205 is engaged with the connector 61. The connector 205 supports coupling and disconnection with the connector 61. That is, the connector 205 is detachably attachable to the connector 61.

The relay 220 controls the connection between the electric vehicle-side power line 53 and the grid-side power line 63. Specifically, when the relay 220 is turned off, the relay 220 disconnects the electric vehicle-side power line 53 and the grid-side electric power line 63 from each other. When the relay 220 is turned on, the relay 220 electrically connects the electric vehicle-side power line 53 and the grid-side power line 63.

The sensing unit 230 senses electric vehicle charging related information to be described later. In particular, the sensing unit 230 may sense both the information about the electric vehicle 100 and the information about the electric vehicle charging cable assembly 20. The sensing unit 230 may sense information on the electric vehicle charging cable assembly 20 without sensing information on the electric vehicle 100. [

The electric vehicle communication unit 240 performs communication with the electric vehicle 100. Specifically, the electric vehicle communication unit 240 communicates with the communication unit 130 of the electric vehicle 100. The electric vehicle communication unit 240 and the communication unit 130 can communicate with each other through the electric power line 53 using a power line communication system. The electric vehicle communication unit 240 and the communication unit 130 may be connected to each other via an infrared communication (IrDA) system, a radio frequency communication system, a Bluetooth system, an ultra wideband (UWB) And ZigBee, Digital Living Network Alliance (DLNA), and the like.

The terminal device communication unit 250 performs communication with the terminal device 300. Specifically, the terminal device communication unit 250 communicates with the communication unit 310 of the terminal device 300. [ In particular, the terminal device communication unit 250 and the communication unit 310 may be connected to each other through an infrared communication (IrDA) method, a radio frequency communication method, a Bluetooth, an ultra wideband (UWB) And ZigBee, Digital Living Network Alliance (DLNA), and the like.

The storage unit 260 stores various information to be described later. Specifically, the storage unit 260 may store electric vehicle charging related information. The storage unit 260 may store information on the usage history of the cable-installed charge control device 210. For example, the storage unit 260 may store information regarding the last use time and time of the cable-installed type charge control apparatus 210, the cumulative use time, and the like.

The controller 270 controls the overall operation of the cable-installed charge control device 200, including the operations described below.

4 is a block diagram of a sensing unit according to an embodiment of the present invention.

4, the sensing unit 230 includes a relay fusion sensing unit 231, a current sensing unit 232, an internal temperature sensing unit 233, an internal humidity sensing unit 234, an external temperature sensing unit An external humidity sensing unit 236, an electrical leak detecting unit 237, a disconnection detecting unit 238, and an allowable current sensing unit 239.

The relay fusion detection unit 231 can detect whether the relay 220 is fused or not.

The current sensing unit 232 may sense the magnitude of the current flowing through the power line 53.

The internal temperature sensing unit 233 can sense the internal temperature of the electric vehicle charging cable assembly 20.

The internal humidity sensing unit 234 can sense the internal humidity of the electric vehicle charging cable assembly 20. [

The external temperature sensing unit 235 senses the temperature around the cable-type charge control device 200.

The external humidity sensing unit 236 senses the humidity around the cable-installed charge control device 200.

The electric leak detecting portion 237 can detect whether or not the electric car charging cable assembly 20 is short-circuited.

The disconnection detecting unit 238 can detect whether the electric vehicle charging cable assembly 20 is disconnected.

The allowable current sensing unit 239 may include a first allowable current sensing unit and a second allowable current sensing unit.

The first allowable current sensing unit senses the allowable current of the electric vehicle side power cable assembly (50). Specifically, the first permissible current sensing unit senses the allowable current of the power supply line 53 on the electric vehicle side.

The second allowable current sensing unit senses the allowable current of the grid side power cable assembly (60). Specifically, the second allowable current sensing unit senses the allowable current of the grid-side power line.

5 is a block diagram of a terminal device according to an embodiment of the present invention.

The terminal device 300 includes a communication unit 310, an input device 320, a control unit 330, and a display unit 340.

The communication unit 310 communicates with the terminal device communication unit 250.

The input device 320 acquires user input. The input device 320 may include at least one of a touch screen, a physical button, a microphone for acquiring a user input in voice form, an acceleration sensor for acquiring a motion gesture of the terminal device 300 as a user input, a keyboard, a mouse, .

The control unit 330 controls the overall operation of the terminal device 300 including an operation to be described later.

The display unit 340 displays information on the charging operation and the state of the cable-installed charge control device 200. In addition, the display unit 340 may display information on the failure of the cable-type charge control device 200 and information on the action of the user corresponding thereto. For example, the display unit 340 may display information on the charging operation and the state of the cable-installed charge control device 200 in a visual display method including at least one of characters, graphics, or light, and / It can be displayed by the enemy display method.

6 is a ladder diagram showing an operation method of the electric vehicle charging system 10 according to an embodiment of the present invention.

The control unit 330 of the terminal device 300 obtains a user input for commanding the electric vehicle charging cable assembly 20 through the input device 320 at step S101. At this time, the user input for controlling the electric vehicle charging cable assembly 20 may include one or more of charging start of the electric vehicle 100, charging stop of the electric vehicle 100, and request of electric car charging related information .

The control unit 330 of the terminal device 300 transmits a command corresponding to the acquired user input to the cable-type charging controller 200 through the communication unit 310 (S103). The control unit 270 of the cable-type charge control device 200 receives the command through the terminal device communication unit 250.

The control unit 270 of the cable-installed charge control device 200 executes the received command (S105).

Specifically, when the command corresponding to the user input is the charging start of the electric vehicle 100, the controller 270 of the cable-installed charging controller 200 turns on the relay 220 turned off to turn on the electric vehicle charging cable assembly (20) can provide AC electric power of the socket (30) to the electric vehicle (100).

More specifically, when the command corresponding to the user input is the charging start of the electric vehicle 100, the control unit 270 of the cable-installed charging control device 200 receives electric power from the electric car ( Side power cable assembly 50 and information on the allowable current of the grid-side power cable assembly 60 to the battery charging device 115 of the power-source side power cable assembly 100. [ The control unit 270 of the cable-type charge control apparatus 200 turns on the relay 220 turned off. Then, the battery charging device 115 of the electric vehicle 100 may determine the charging current based on the provided information, and may then charge the battery 110 by bringing the determined charging current through the electric vehicle charging cable assembly 20 .

The battery charger 115 of the electric vehicle 100 can be charged with a current equal to or lower than the permissible current when the controller 270 provides information on the permissible current of the electric power cable assembly 50 of the electric vehicle 100. [ (110).

The battery charger 115 of the electric vehicle 100 may supply the electric power to the battery (not shown) using a current smaller than or equal to the allowable current, when the controller 270 provides information on the allowable current of the grid- 110).

When the control unit 270 provides information on the allowable current of the electric vehicle side power cable assembly 50 and information on the allowable current of the grid side power cable assembly 60, 115 can charge the battery 110 using a current smaller than or equal to the smaller of the two allowable currents.

The control unit 270 of the cable installation type charge control apparatus 200 turns off the turned on relay 220 to turn off the electric vehicle charging cable assembly 20, So that the electric vehicle 100 can no longer be charged.

When the command corresponding to the user input is a request for electric vehicle charging related information, the controller 270 of the cable installation type charging control device 200 collects electric vehicle charging related information.

The control unit 270 of the cable-type charge control device 200 transmits a response corresponding to the received command to the terminal device 300 through the terminal device communication unit 250 (S107).

When the command corresponding to the user input is the charge start of the electric vehicle 100, the response may include information informing that the state of the relay 220 is the turn-on state.

If the command corresponding to the user input is charge stop of the electric vehicle 100, the response may include information indicating that the state of the relay 220 is the turn off state.

If the command corresponding to the user input is a request for electric car charging related information, the response may include information about electric car charging collected.

The electric vehicle charging related information may include at least one of information on the electric vehicle 100 and information on the electric vehicle charging cable assembly 20.

The information on the electric vehicle 100 includes an initial charge state, a current charge state, a charge start time, a predicted charge end time, an actual charge end time, an electric vehicle charge status information, Information on the charging error of the vehicle, information on the amount of electric power supplied to the electric vehicle 100, and information on the magnitude of the electric current applied to the electric vehicle 100, for example. The initial charge state and the current charge state may be expressed as a ratio of the current charge amount to the total capacity of the battery 110. [ The electric vehicle charging status information may indicate whether the electric vehicle 100 is charging, waiting for charging, or charging has been completed.

The information on the electric vehicle charging cable assembly 20 includes information on the charging operation of the electric vehicle charging cable assembly 20 and information on the usage history of the electric vehicle charging cable assembly 20, , Information on the failure of the electric vehicle charging cable assembly 20, information on the permissible current of the electric vehicle side power cable assembly 50, information on the permissible current of the grid side electric power cable assembly 60 And may include at least one. Information regarding the charging operation of the electric vehicle charging cable assembly 20 may indicate whether the electric vehicle charging cable assembly 20 is providing the electric power of the socket 30 to the electric vehicle 100. [ The state information of the electric vehicle charging cable assembly 20 includes information on the state of the relay 220, information on whether or not the relay 220 is fused, information on the temperature of the electric vehicle charging cable assembly 20, Information about the electric leakage of the electric car charging cable assembly 20, information about disconnection of the electric car charging cable assembly 20, and environment information about the electric car charging cable assembly 20 . Information about the state of the relay 220 may indicate whether the relay 220 is turned on or turned off. The environmental information of the surroundings of the electric vehicle charging cable assembly 20 may include at least one of information on the ambient temperature and information on the ambient humidity.

The control unit 330 of the terminal device 300 displays the received response on the display unit 340 (S109).

The control unit 330 of the terminal device 300 displays on the display unit 340 information indicating that the state of the relay 220 is in a turned-on state when the command corresponding to the user input is charging of the electric vehicle 100 .

The control unit 330 of the terminal 300 displays information informing that the state of the relay 220 is in the turned off state on the display unit 340 can do.

When the command corresponding to the user input is a request for electric vehicle charging related information, the control unit 330 of the terminal device 300 can display the electric vehicle charging related information on the display unit 340. The user can input additional user input for controlling the electric vehicle charging cable assembly 20 into the terminal device 300 through the input device 320 by referring to the displayed electric vehicle charging related information.

In this way, the information about the charging operation and the state of the electric vehicle charging cable assembly 20 is displayed through the terminal device 300. Therefore, the user can more easily and easily recognize the information on the charging operation and the state of the electric vehicle charging cable assembly 20. Also, the user can more easily determine whether the electric car charging cable assembly 20 is faulty or faulty through information on the state of the electric car charging cable assembly 20, and can quickly take measures corresponding thereto . For example, when the ground wire between the electric vehicle charging cable assembly 20 and the commercial power supply is short-circuited, it can not be detected separately in the past. However, in this embodiment, the sensing unit 230 senses the disconnection and displays it, so that the user can stop the charging operation of the electric vehicle charging cable assembly 20, and repair or repair the disconnected part . Particularly, when information on the failure of the electric vehicle charging cable assembly 20 and the corresponding action items are transmitted from the cable-installed charge control device 200 to the terminal device 300, And can take action on it. Therefore, the user can recognize in advance that the electric car 100 is not being charged due to the failure of the electric car charging cable assembly 20. Further, for example, when the history of use of the electric vehicle charging cable assembly 20 is transmitted to the terminal device 300, the user predicts the life of the electric vehicle charging cable assembly 20 in advance, Cable assemblies can be prepared.

On the other hand, the electric vehicle charging cable assembly 20 is frequently used in a harsh environment and may cause frequent repair and replacement. However, when the electric vehicle charging cable assembly 20 has the cable-mounted charging control device 200 including the terminal device communication unit 250 which is relatively expensive, the electric vehicle charging cable assembly 20 has characteristics that are robust against external temperature, external humidity, It is possible to make the repair more difficult due to the characteristics of the cable-type charge control device 200 manufactured to be installed, and to increase the cost burden in the replacement.

In order to solve such a problem, it may be considered to separate the terminal device communication unit of the cable-installed type charge control device 200 into a separate device. This embodiment will be described with reference to Figs. 7 to 10. Fig.

7 is a conceptual diagram of a charging system for an electric vehicle according to another embodiment of the present invention.

Referring to FIG. 7, an electric vehicle charging system 10 according to an embodiment of the present invention includes an electric vehicle 100, an electric vehicle charging cable assembly 20, a socket 30, a terminal device 300, On communication device (400).

In particular, the system of FIG. 7 is the same as the add-on communication apparatus 400 in the system of FIG. 1 except for the portion related to the add-on communication apparatus 400, and a detailed description thereof will be omitted.

The cable-installed charge control device 200 monitors the charge of the electric vehicle 100, provides the charge-related information acquired through monitoring to the add-on communication device 400, and controls charging of the electric vehicle 100 do.

When the cable-installed charge control device 200 is provided with a connector for wire communication, the connector may include a metal terminal, so that it may be vulnerable to external environment. In order to solve such a problem, the cable-installed charge control device 200 can communicate with the add-on communication device 400 wirelessly.

The terminal device 300 wirelessly communicates with the add-on communication device 400 in a non-contact manner to display information about the electric vehicle charging cable assembly 20. [

The add-on communication device 400 is attached to the cable-installed charge control device 200. At this time, the add-on communication device 400 may be mechanically combined with the cable-type charge control device 200. Also, the add-on communication device 400 may be attached to the cable-type charge control device 200 by magnetic force.

8 is a block diagram of an electric vehicle charging cable assembly in accordance with another embodiment of the present invention.

Compared with the embodiment of Fig. 3, the cable-installed charge control device 200 shown in Fig. 8 further includes an add-on device communication unit 210. Fig. The cable-type charge control device 200 shown in FIG. 8 may not have the terminal device communication unit 250 to lower the price and the repairing cost, but may include the terminal device communication unit 250 in various applications.

The operations of the relay 220, the sensing unit 230, the electric vehicle communication unit 240, the storage unit 260, and the control unit 270 are the same as or similar to those of the embodiment of FIG.

The add-on device communication unit 210 performs communication with the add-on communication device 400. The add-on device communication unit 210 and the add-on communication device 400 are connected to each other via an infrared communication (IrDA) system, a radio frequency communication system, a Bluetooth system, an ultra wideband (UWB) ), And ZigBee, Digital Living Network Alliance (DLNA), or the like.

In particular, the add-on device communication unit 210 may use an infrared data association (IrDA) method to lower the price of the electric vehicle charging cable assembly 20 and the add-on communication device 400. At this time, the add-on device communication unit 210 may include an infrared light emitting diode and an infrared light receiving diode.

9 is a block diagram of an add-on communication apparatus according to an embodiment of the present invention.

The add-on communication device 400 includes a charge control device communication unit 440, a terminal device communication unit 450, a storage unit 460, and a control unit 470.

The charging control device communication unit 440 performs communication with the cable installation type charging control device 200. [ Specifically, the charge control device communication unit 440 communicates with the add-on device communication unit 210 of the cable-type charge control device 200. [ The charging control device communication unit 440 and the add-on device communication unit 210 may communicate with each other through an infrared communication (IrDA), a radio frequency communication, a Bluetooth, an ultra wideband (UWB) , ZigBee, Digital Living Network Alliance (DLNA), and the like.

In order to lower the prices of the electric vehicle charging cable assembly 20 and the add-on communication device 400, the charging control device communication unit 440 may use an infrared data association (IrDA) method. At this time, the charge control device communication unit 440 may include an infrared ray emitting diode 441 and an infrared ray receiving diode 442.

The position of the infrared ray emitting diode 441 and the infrared ray receiving diode 442 of the charge control device communication unit 440 may be set to be the same as that of the cable type charging control device 200, And is matched to the infrared light-receiving diode and the infrared light-emitting diode of the add-on device communication unit 210 of the control device 200, respectively.

The terminal device communication unit 450 performs communication with the terminal device 300. Specifically, the terminal device communication unit 450 communicates with the communication unit 310 of the terminal device 300. Particularly, the terminal device communication unit 450 and the communication unit 310 can communicate with each other through an infrared communication (IrDA) method, a radio frequency communication method, a Bluetooth, an ultra wideband (UWB) And ZigBee, Digital Living Network Alliance (DLNA), and the like. In particular, the terminal device communication unit 450 may be a wireless local area network (WLAN) such as WI-FI defined in IEEE 802.11 and a wireless remote area network (WLAN) defined by the IEEE 802.16 or Long Term Evolution And a wireless wide area network (WWAN).

The storage unit 460 stores various information to be described later. Specifically, the storage unit 460 may store electric vehicle charging related information. The storage unit 460 may store information on the use history of the cable-installed type charge control apparatus 210. For example, the storage unit 460 may store information regarding the last usage time and time and the cumulative use time of the cable-installed charge control device 200. [

The control unit 470 controls the overall operation of the add-on communication apparatus 400, including the operations described below.

Since the add-on communication device 400 is not in direct electrical contact with the cable-type charge control device 200, it is necessary to receive additional power. However, when the user is not using the add-on communication device 400, the user may not interrupt the power provided to the add-on communication device 400. [ This increases unnecessary power consumption, and therefore, there is a demand for minimizing power consumption when the add-on communication device 400 is not in use.

10 is a ladder diagram showing an operation method of the electric vehicle charging system 10 according to another embodiment of the present invention.

The control unit 330 of the terminal device 300 obtains a user input for setting the add-on communication device 400 through the input device 320 (S301). The user input for setting the add-on communication device 400 may include at least one of a charge allowance amount and a charge mode. The charge allowable amount may include at least one of a charge allowable amount in a public area and a charge allowable amount in a home area. The charging mode may include at least one of a charging mode in the public area and a charging mode in the home area. The allowable charge amount may be an absolute value represented by a unit such as Wh, or a relative value represented by a unit such as%. The set of values that the charge mode may represent may include a fast charge mode and a slow charge mode.

The control unit 330 of the terminal device 300 controls the communication unit 310 to transmit the setting information corresponding to the user input acquired by the communication unit 310 to the add- 400 (S303). At this time, the setting information may include at least one of setting information for the allowable charging amount and setting information for the charging mode. The setting information for the allowable charge amount may include at least one of setting information for the allowable charge amount in the public area and setting information for the allowable charge amount in the home area. The setting information for the charging mode may include at least one of setting information for the charging mode in the public area and setting information for the charging mode in the home area. The control unit 470 of the add-on communication device 400 receives the setting information from the terminal device 300 through the terminal device communication unit 450.

The add-on communication apparatus 400 stores the received setting information in the storage unit 460, and sets the add-on communication apparatus 400 based on the received setting information (S305).

Meanwhile, the control unit 330 of the terminal device 300 obtains a user input for commanding the electric vehicle charging cable assembly 20 through the input device 320 (S315). At this time, the user input for controlling the electric vehicle charging cable assembly 20 may include one or more of charging start of the electric vehicle 100, charging stop of the electric vehicle 100, and request of electric car charging related information . The user input may include at least one of a fast charge initiation, a slow charge initiation.

The control unit 330 of the terminal device 300 transmits a command corresponding to the acquired user input to the add-on communication device 400 through the communication unit 310 (S317). The control unit 470 of the add-on communication device 400 can receive a command from the terminal device 300 through the terminal device communication unit 450. At this time, the set of values that the command can indicate may include a start of charging of the electric vehicle 100, a charge stop of the electric vehicle 100, and a request of electric car charging related information. The set of values that charging start of electric vehicle 100 may indicate may include a fast charge start and a low charge charge start of electric vehicle 100.

The control unit 470 of the add-on communication device 400 generates a control command for controlling the cable-type charge control device 200 (S318). The control unit 470 of the add-on communication apparatus 400 controls the control unit 470 based on at least one of the command received from the terminal device 300, the current position, setting information, and the charging state of the electric vehicle 100, Command can be generated. At this time, the set of values that the control command may indicate may include a request for charging start, charge stop, electric car charging related information. The set of values that the charge initiation may indicate may include a fast charge initiation, a slow charge initiation.

In one embodiment, if the command received from the terminal device 300 is charging start, the control unit 470 of the add-on communication device 400 may generate a control command indicating the start of charging.

In one embodiment, if the command received from the terminal device 300 is a fast charge start, the control section 470 of the add-on communication device 400 can generate a control command indicating the fast charge start.

In one embodiment, if the command received from the terminal device 300 is a slow charge start, the control portion 470 of the add-on communication device 400 may generate a control command indicating low-speed charge initiation.

In one embodiment, when the command received from the terminal device 300 is charging start and the set charge mode is the fast charge mode, the control unit 470 of the add-on communication device 400 generates a control command indicating the fast charge start can do.

In one embodiment, when the command received from the terminal device 300 is charging start and the set charge mode is the low-speed charge mode, the control unit 470 of the add-on communication device 400 generates a control command indicating the low- can do.

In one embodiment, if the command received from the terminal device 300 is a charge stop, the control unit 470 of the add-on communication device 400 may generate a control command indicating a charge stop.

In one embodiment, if the command received from the terminal device 300 is a request for electric vehicle charging related information, the control unit 470 of the add-on communication device 400 issues a control command indicating the request for electric vehicle charging related information Can be generated.

In one embodiment, when the command received from the terminal device 300 is charging and the current position is the home area, the control unit 470 of the add-on communication device 400 controls the charging mode according to the set charging mode in the home area It is possible to generate a control command indicating the start of charging. Specifically, when the set charging mode in the home area is the fast charging mode, the control unit 470 of the add-on communication device 400 can generate a control command indicating the fast charging start. When the set charging mode in the home area is the low-speed charging mode, the control unit 470 of the add-on communication device 400 can generate the control command indicating the low-speed charging start.

In a preferred embodiment, when the command received from the terminal device 300 is charging and the current position is a public area, the control unit 470 of the add-on communication device 400 selects the charging mode It is possible to generate a control command indicating the start of charging. Specifically, when the set charging mode in the public area is the fast charging mode, the control unit 470 of the add-on communication device 400 can generate a control command indicating the fast charging start. When the set charging mode in the public area is the low-speed charging mode, the control unit 470 of the add-on communication device 400 can generate the control command indicating the low-speed charging start.

In one embodiment, when the command received from the terminal device 300 is charging and the current position is the home area, the control unit 470 of the add-on communication device 400 generates a control command indicating the start of the low- can do.

In one embodiment, when the command received from the terminal device 300 is charging start and the current position is a public area, the control unit 470 of the add-on communication device 400 generates a control command indicating the fast charge start can do.

In one embodiment, when the command received from the terminal device 300 is charge start and the amount of power supplied to the electric vehicle 100 as a result of the monitoring reaches the set charge allowable amount, 470) may generate a control command indicating a charge interruption.

When the command received from the terminal device 300 is the charging start and the current position is the home area and the amount of power supplied to the electric vehicle 100 as a result of the monitoring reaches the set charging capacity in the home area, The control unit 470 of the add-on communication device 400 may generate a control command indicating a charge interruption.

When the command received from the terminal device 300 is charge start, the current position is the public area, and the amount of power supplied to the electric vehicle 100 as a result of the monitoring reaches the set chargeable amount in the public area, The control unit 470 of the add-on communication device 400 may generate a control command indicating a charge interruption.

To this end, the control unit 470 of the add-on communication device 400 can acquire the current position of the electric vehicle 100. The control unit 470 of the add-on communication device 400 may control the electric vehicle 100 using at least one of global positioning system (GPS) information, base station information of a wireless local area network, and base station information of a wireless long- Can be obtained.

The set of values that the current location may represent may be a home area and a public area.

The control unit 470 of the add-on communication device 400 transmits the generated control command to the cable-type charge control device 200 through the charge control device communication unit 440 (S319). The infrared ray emitting diode 441 of the charge control device communication unit 440 can irradiate infrared rays having a digital pattern corresponding to the generated control command.

The control unit 270 of the cable-installed charge control device 200 executes the received control command (S321).

Specifically, when the command corresponding to the user input is the charging start of the electric vehicle 100, the controller 270 of the cable-installed charging controller 200 turns on the relay 220 turned off to turn on the electric vehicle charging cable assembly (20) can provide AC electric power of the socket (30) to the electric vehicle (100).

The control unit 270 of the cable installation type charge control apparatus 200 turns on the relay 220 that is turned off to turn on the electric vehicle charging cable assembly 20 So that the AC power of the socket 30 can be supplied to the electric vehicle 100 at a high speed.

When the command corresponding to the user input is the low-speed charging start of the electric vehicle 100, the controller 270 of the cable-installed charging controller 200 turns on the relay 220 turned off to turn on the electric vehicle charging cable assembly 20 So that the AC electric power of the socket 30 can be supplied to the electric vehicle 100 at a low speed.

The control unit 270 of the cable installation type charge control apparatus 200 turns off the turned on relay 220 to turn off the electric vehicle charging cable assembly 20, So that the electric vehicle 100 can no longer be charged.

When the command corresponding to the user input is a request for electric vehicle charging related information, the controller 270 of the cable installation type charging control device 200 collects electric vehicle charging related information.

The control unit 270 of the cable-installed charge control device 200 transmits a response corresponding to the received command to the add-on communication device 400 through the add-on device communication unit 210 (S323). The infrared ray emitting diode of the add-on device communication unit 210 of the cable-type charge control device 200 can irradiate infrared rays having a digital pattern corresponding to a response corresponding to the received command. The control unit 470 of the add-on communication device 400 can receive a response from the cable-installed charge control device 200 through the charge control device communication unit 440. [

When the command corresponding to the user input is the charge start of the electric vehicle 100, the response may include information informing that the state of the relay 220 is the turn-on state.

If the command corresponding to the user input is the fast charge start of the electric vehicle 100, the response may include information indicating that the state of the relay 220 is a turn-on state for fast charge.

If the instruction corresponding to the user input is the low-speed charge start of the electric vehicle 100, the response may include information indicating that the state of the relay 220 is a turn-on state for low-speed charging.

If the command corresponding to the user input is charge stop of the electric vehicle 100, the response may include information indicating that the state of the relay 220 is the turn off state.

If the command corresponding to the user input is a request for electric car charging related information, the response may include information about electric car charging collected. As described above, the electric vehicle charging related information may include at least one of information on the electric vehicle 100 and information on the electric vehicle charging cable assembly 20.

The control unit 470 of the add-on communication apparatus 400 transmits the received response to the terminal apparatus 300 through the terminal apparatus communication unit 450 (S325).

The control unit 330 of the terminal device 300 displays the received response on the display unit 340 (S327). Since the operation described in step S109 can be applied to the operation in step S327, a detailed description for the operation in step S327 will be omitted.

On the other hand, the control unit 470 of the add-on communication apparatus 400 checks whether the generated control command is completed (S331).

The control unit 470 of the add-on communication apparatus 400 can determine that the generated control command is not completed when the generated control command is charging start, the charge allowable amount is set, and charging has not been completed yet.

On the other hand, if the generated control command is a charge interruption, or if the generated control command is a request for electric car charging related information, or if the control command is a charge start state in a state in which the charge allowable amount is not set, The control unit 470 of the controller 400 may determine that the generated control command is completed.

When the received control command is completed, the control unit 470 of the add-on communication apparatus 400 can wait for reception of new setting information or a new command.

If the generated control command is not completed, the control unit 470 of the add-on communication device 400 monitors the charged state of the electric vehicle 100 (S333). Particularly, the controller 470 of the add-on communication device 400 can monitor the amount of electric power supplied to the electric vehicle 100.

The control unit 470 of the add-on communication device 400 checks whether a further control command for the cable-installed charge control device 200 is necessary based on at least one of the charge state and the setting information of the electric vehicle 100 S335). Specifically, the control unit 470 of the add-on communication device 400 compares the amount of power supplied to the electric vehicle 100 with the set allowable charge amount to check whether an additional control command for the cable-installed charge control unit 200 is necessary can do. The control unit 470 of the add-on communication device 400 may issue an additional control command to the cable-installed charge control device 200 when the amount of electric power supplied to the electric vehicle 100 reaches the set allowable charge amount It can be judged to be necessary. The control unit 470 of the add-on communication apparatus 400 may issue an additional control command for the cable-installed charge control apparatus 200 when the amount of power supplied to the electric vehicle 100 does not reach the set allowable charge amount It can be judged that it is not necessary.

If no additional control command is required, the controller 470 of the add-on communication device 400 can continue to monitor the charging status of the electric vehicle 100. [

If an additional control command is required, the control unit 470 of the add-on communication device 400 generates an additional control command (S318). Since the generation of the control command at this time has been described above, the description thereof will be omitted here.

11 is a ladder diagram showing a method of operating the electric vehicle charging system 10 according to another embodiment of the present invention.

The terminal device 300 transmits a charge command to the cable-installed charge control device 200 (S501).

The control unit 270 of the cable installation type charge control apparatus 200 receives the charge current of the electric vehicle charge cable assembly 20 through the allowable current detection unit 239 (S503).

At this time, the allowable current of the electric vehicle charging cable assembly 20 may be the permissive current of the electric vehicle side power cable assembly 50 or the permissible current of the grid side power cable assembly 60. The allowable current of the electric vehicle charging cable assembly 20 may be an allowable current that satisfies both the allowable current of the electric vehicle side power cable assembly 50 and the allowable current of the grid side power cable assembly 60. [ More specifically, the allowable current of the electric vehicle charging cable assembly 20 may be a small value among the allowable current of the electric vehicle side power cable assembly 50 and the allowable electric current of the grid side power cable assembly 60.

In the embodiment, if the electric vehicle side power cable assembly 50 is not attached and detached integrally with the cable-installed type charge control device 200 and the allowable current of the electric vehicle side power cable assembly 50 is made relatively high, The installation type charge control apparatus 200 can measure the allowable current of the grid side power cable assembly 60 without measuring the allowable current of the electric vehicle side power cable assembly 50.

The cable-installed charge control device 200 transmits information on the measured allowable current to the electric vehicle 100 (S505).

At this time, the cable-installed charge control device 200 determines whether or not the information on the allowable current of the electric vehicle-side power cable assembly 50, information on the allowable electric current of the grid-side power cable assembly 60, And information on the allowable current.

The cable-installed charge control device 200 transmits information on the measured allowable current to the terminal device 300 (S507).

At this time, the cable-installed charge control device 200 determines whether or not the information on the allowable current of the electric vehicle-side power cable assembly 50, information on the allowable electric current of the grid-side power cable assembly 60, And information on the allowable current.

The electric vehicle 100 and the cable-installed charge control device 200 start charging the battery 110 of the electric vehicle 100 (S509). At this time, the controller 270 of the cable-type charge control device 200 turns on the relay 220 to turn on the electric vehicle charging cable assembly 20 to supply the AC electric power of the socket 30 to the electric vehicle 100 .

The battery charging device 115 of the electric vehicle 100 may determine the charging current based on the provided information and then charge the battery 110 by bringing the determined charging current through the electric vehicle charging cable assembly 20. That is, the battery charging device 115 of the electric vehicle 100 can charge the battery 110 using the charging current satisfying the allowable current of the electric vehicle charging cable assembly 20. [

The cable-installed charge control device 200 informs the terminal device 300 of the start of charging (S511).

The control unit 270 of the cable-type charge control apparatus 200 measures the charge current through the current sensing unit 232 (S513).

The control unit 270 of the cable-installed charge control device 200 detects whether the charge current exceeds the allowable current (S515).

If the charging current does not exceed the allowable current, the controller 270 of the cable-installed charging controller 200 determines whether charging is completed (S517).

If the charging is not completed, the electric vehicle 100 and the cable-installed charge control device 200 continue to charge the battery 110 of the electric vehicle 100.

When the charging is completed, the cable-installed charge control device 200 informs the terminal device 300 of the completion of charging (S519) and stops charging the battery 110 (S521). At this time, the control unit 270 of the cable-type charge control apparatus 200 turns off the turned-on relay 220.

On the other hand, if the charge current exceeds the allowable current, the cable-installed charge control device 200 transmits an abnormal charge stop notification message informing that the charge current exceeds the allowable current to the terminal device 300 (S523) 110) is stopped (S521). At this time, the control unit 270 of the cable-type charge control apparatus 200 turns off the turned-on relay 220.

11, the exchange of information between the cable-installed charge control device 200 and the terminal device 300 may be performed without going through the add-on communication device 400, or may be performed via the add-on communication device 400 .

The communication between the electric vehicle 100 and the cable installation type charge control device 200, the communication between the cable installation type charge control device 200 and the add-on communication device 400, the connection between the cable installation type charge control device 200 and the terminal device 300 Communication between the add-on communication device 400 and the terminal device 300 can be performed in the manner described above.

11, when the terminal device 300 receives the information, the terminal device 300 can display the information. For example, when the terminal device 300 receives an abnormal charging stop notification message informing that the charging current exceeds the allowable current, the terminal device 300 may display a message informing that the charging current exceeds the allowable current have.

Next, the measurement of the allowable current according to the embodiment of the present invention will be described with reference to Figs. 12 to 14. Fig.

12 shows a cable-type charge control apparatus and a sub-cable assembly including a detailed configuration of an allowable current sensing unit according to an embodiment of the present invention.

12, the connector 61 of the grid-side power cable assembly 60 includes a first power terminal L, a second power terminal N, a signal terminal PP, and a ground terminal PE .

Further, the grid-side power cable assembly 60 further includes a permissible current indicating capacitor Cv.

One end of the allowable current indicating capacitor Cv is connected to the signal terminal PP of the grid side power cable assembly 60 and the other end is connected to the ground terminal PE of the grid side power cable assembly 60.

On the other hand, the connector 205 of the cable-type charge control device 200 includes a first power terminal L, a second power terminal N, a signal terminal PP, and a ground terminal PE.

The grid AC power flows through the first power terminal L and the second power terminal N of the connector 205 of the cable installation type charge control device 200. [

The signal terminal PP of the connector 61 is connected to the signal terminal PP of the connector 205 after the power terminals of the connector 61 are connected to the power terminals of the connector 205. [ A signal terminal PP and a signal terminal PP of the connector 205 may be provided.

The relay 220 of the cable-type charge control device 200 includes a first relay 220a and a second relay 220b.

The cable-mounted charge control apparatus 200 further includes an AC-DC converter 280. [

The allowable current detection unit 239 includes a pulse signal generation unit 239a, a pulse width measurement unit 239b, and an allowable current determination unit 239c.

The pulse signal generating section 239a includes a reference voltage generating section U2, a comparing section U1, and a carpetatter charging resistor Rk.

The reference voltage generating unit U2 includes a first resistor R1 and a second resistor R2.

One end of the kicker charging resistor Rk is connected to the working DC voltage and the other end is connected to the signal terminal PP of the connector 205. [

One end of the first resistor R1 is connected to the working DC voltage. One end of the second resistor R2 is connected to the other end of the first resistor R1 and the other end of the second resistor R2 is connected to the ground terminal PE of the connector 205. [

The comparator U1 includes a positive input terminal connected to the signal terminal PP of the connector 205, a negative input terminal connected to the other end of the resistor R1, and an output terminal for outputting a pulse signal.

Hereinafter, an allowable current sensing method according to an embodiment of the present invention will be described with reference to FIG.

FIG. 13 is a flowchart illustrating a method of sensing the allowable current according to an embodiment of the present invention.

When the power terminals of the connector 205 are connected to the power terminals of the connector 61, the AC-to-DC converter 280 generates the working DC voltage using the incoming grid DC power through the power terminals of the connector 205 (S701).

The pulse signal generator 239a generates a pulse signal using the operation DC voltage (S703). At this time, the pulse signal may have a pulse width indicating the allowable current. The pulse signal generator 239a charges the allowable current indicating capacitor Cv through the kicker FET charging resistor Rk by using the operating DC voltage and outputs the pulse signal having the pulse width corresponding to the charging rate of the allowable current indicating capacitor Cv A pulse signal can be generated.

More specifically, the reference voltage generating unit U2 generates the reference voltage using the operating DC voltage. The reference voltage generating unit U2 can generate the reference voltage by dividing the operating DC voltage. The reference voltage generating unit U2 may generate the reference voltage by dividing the operating DC voltage using the first resistor R1 and the second resistor R2 connected in series.

When the signal terminal PP of the connector 61 is connected to the signal terminal PP of the connector 205, the kicker charging resistor Rk charges the allowable current indicating capacitor Cv using the operating DC voltage .

The comparing unit U1 compares the voltage across the allowable current indicating capacitor Cv, that is, the voltage at the node N1 with the reference voltage to generate a pulse signal.

The pulse signal generator 239a will be described in detail with reference to FIG.

FIG. 14 is a signal waveform diagram in an allowable current sensing unit according to an embodiment of the present invention.

Between the time 0 and the time t1, the power terminals of the connector 61 are not connected to the power terminals of the connector 205.

At time tl, the power terminals of the connector 61 are connected to the power terminals of the connector 205. [ The AC-to-DC converter 280 then uses the incoming grid DC power through the power terminals of the connector 205 to generate an operating DC voltage.

Before the power terminals of the connector 61 are connected to the power terminals of the connector 205 and before the signal terminal PP of the connector 61 is connected to the signal terminal PP of the connector 205, Since the magnitude of the voltage is the same as the magnitude of the operation DC voltage and the magnitude of the reference voltage Vref has a magnitude of the distributed operation DC voltage, the magnitude of the voltage at the node N1 is larger than the reference voltage Vref. Thus, the comparator U1 outputs a pulse signal of logic high.

The signal terminal PP of the connector 61 is connected to the signal terminal PP of the connector 205 at time t2. At this time, since the state of the allowable current indication capacitor Cv is not fully charged, a large current is instantaneously introduced into the allowable current indication capacitor Cv, so that the magnitude of the voltage of the node N1 is close to 0 . Thus, the comparator U1 outputs a logic low-level pulse signal.

After the time t2, as the allowable current indicating capacitor Cv is charged, the voltage of the node N1 gradually increases. The larger the allowable current indicating capacitor Cv is, the smaller the rate of increase of the voltage of the node N1 is.

When the magnitude of the allowable current indicating capacitor Cv is C1, the magnitude of the voltage of the node N1 after time t3 is larger than the reference voltage Vref. Thus, after time t3, the comparator U1 outputs a pulse signal of logic high. Thus, the pulse signal has a pulse of logic low between time t2 and time t3.

The magnitude of the voltage of the node N1 after the time t4 is larger than the reference voltage Vref when the size of the allowable current indicating capacitor Cv is C2 (> C1). Thus, after time t4, the comparing unit U1 outputs a pulse signal of logic high. Thus, the pulse signal has a pulse of logic low between time t4 and time t3. The width of this pulse is larger than the width of the pulse when the allowable current indicating capacitor Cv is C1.

The magnitude of the voltage of the node N1 after the time t5 is larger than the reference voltage Vref when the size of the allowable current indicating capacitor Cv is C3 (> C2). Thus, after time t5, the comparator U1 outputs a pulse signal of logic high. Thus, the pulse signal has a pulse of logic low between time t5 and time t3. The width of this pulse is larger than the width of the pulse when the allowable current indicating capacitor Cv is C2.

As the size of the allowable current indication capacitor Cv is larger, the rate of increase of the voltage of the node N1 becomes smaller, and accordingly, a pulse signal having a larger pulse width is generated.

13 is described again.

The pulse width measuring unit 239b measures the pulse width of the pulse signal (S705).

The allowable current determination unit 239c determines the allowable current of the grid-side power cable assembly 60 based on the measured pulse width (S707). The allowable current determination section 239c can determine the current corresponding to the measured pulse width as the allowable current of the grid side power cable assembly 60. [ Specifically, the allowable current determiner 239c can determine the current corresponding to the pulse width as the permissible current of the electric vehicle charging cable assembly 20 by using the look-up table as shown in Table 1. [

Pulse width Allowable current 10 usec 26A 15 usec 29A 20 usec 32A 25 usec 35A 30 usec 38A

According to an embodiment of the present invention, the above-described method can be implemented as a code readable by a processor on a medium on which a program is recorded. Examples of the medium that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and may be implemented in the form of a carrier wave (e.g., transmission over the Internet) .

The above-described mobile terminal may be configured such that all or some of the embodiments are selectively combined so that various modifications can be made to the embodiments and the methods of the embodiments described above are not limitedly applied .

Claims (9)

A cable-mounted charge control apparatus connectable with a grid-side cable assembly having an allowable current indicating capacitor,
An electric vehicle side cable assembly coupled with an electric vehicle;
A connector coupled to the grid-side cable assembly; And
A permissible current sensing unit for charging the allowable current indicating capacitor to generate a pulse signal having a pulse width corresponding to the charging rate of the allowable current indicating capacitor and determining a permissive current of the grid side cable assembly based on the pulse width doing
Cable-mounted charge control unit. The method according to claim 1,
The allowable current sensing unit
A resistor for charging the allowable current indicating capacitor,
A comparing unit for comparing the voltage applied to the allowable current indicating capacitor with a reference voltage to generate the pulse signal,
A pulse width measuring unit for measuring the pulse width,
And a permissible current determination unit for determining a permissible current of the grid side cable assembly based on the pulse width
Cable-mounted charge control unit. 3. The method of claim 2,
A power terminal connected to a power terminal of the grid side cable assembly;
A signal terminal connected to a signal terminal of the grid side cable assembly;
Further comprising an AC-to-DC converter for converting a grid AC power flowing through the power terminal to an operation DC voltage,
Wherein the resistor charges the allowable current indicating capacitor using the operating DC voltage
Cable-mounted charge control unit. The method of claim 3,
And the signal terminal of the grid side cable assembly is connected to the signal terminal of the cable installation type charge control device after the power terminal of the grid side cable assembly is connected to the power terminal of the cable installation type charge control device, Is provided with a signal terminal
Cable-mounted charge control unit. The method according to claim 1,
Wherein the allowable current sensing unit uses a look-up table to determine an allowable current of the grid side cable assembly based on the pulse width
Cable-mounted charge control unit. The method according to claim 1,
A relay for controlling connection between the electric vehicle side cable assembly and the grid side cable assembly;
The relay is turned on to charge the electric vehicle, and information on the allowable current of the grid-side cable assembly is provided to the electric vehicle so that the electric vehicle can charge the battery And a control unit
Cable-mounted charge control unit. The method according to claim 6,
The control unit measures the charge current and turns off the relay when the charge current exceeds the allowable current
Cable-mounted charge control unit. 8. The method of claim 7,
And a communication unit for communicating with the add-on communication apparatus attached to the cable-installed type charge control apparatus,
The control unit informs the terminal device of the charge current exceeding the allowable current through the add-on communication communication device through the communication unit
Cable-mounted charge control unit. A cable-installed type charge control apparatus connectable with a grid-side cable assembly having a signal terminal connected to one end of a first capacitor,
A power terminal through which grid AC power flows;
A signal terminal connected to a signal terminal of the grid side cable assembly;
A resistor having one end connected to the signal terminal; And
And a permissible current sensing unit for generating a pulse signal based on the voltage of the signal terminal and determining a permissible current of the grid side cable assembly based on the pulse width of the pulse signal
Cable-mounted charge control unit.

Images