KR101297507B1 - A charging device for electric vehicle and method for charge current setting thereof - Google Patents

Abstract

PURPOSE: A charger of an electric vehicle and a charging current setting method thereof are provided to protect an internal module of the charger from contamination factors such as dust and moisture by not using a separate external port in an environment without charging infrastructure and not opening an enclosure of the charger. CONSTITUTION: A charger (100) of an electric vehicle includes an RFID reader (110) which is arranged in a main body of the charger and obtains tag data from an RFID tag; a memory part (120) which stores the tag data obtained from the RFID reader; and a control part (140) which stores the obtained tag data in the memory part and sets a charging condition of the electric vehicle using the stored tag data. The tag data includes information for setting the maximum charging current of the charger. [Reference numerals] (110) RFID reader; (120) Memory part; (130) Display part; (140) Control part

Description

CHARGING DEVICE FOR ELECTRIC VEHICLE AND METHOD FOR CHARGE CURRENT SETTING THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vehicle charger, and more particularly, to an electric vehicle charger capable of setting a charging current in a simple manner and a charging current setting method thereof.

Electric vehicles are cars that use batteries and electric motors without petroleum fuels and engines. Electric vehicles were first produced in 1873, but they were not put to practical use due to technical limitations such as heavy weight of batteries and charging time.

On the other hand, electric vehicles were produced in small quantities from the United States until the mid-1920s with advantages such as simple structure, durability, and easy operation. In recent years, regulations on exhaust emissions from vehicles have been rising due to environmental pollution (pollution) problems in the United States and Europe, and oil prices are soaring that electric vehicles are attracting attention as next-generation vehicles. In other words, electric vehicles using pollution-free electric energy are able to fundamentally solve environmental problems such as harmful exhaust gas and noise of internal combustion engines that occupy about 70% of air pollution factors, The resource life can be extended more than twice.

Accordingly, various technologies related to electric vehicles have been developed since 1990. In other words, automobile manufacturers are developing a variety of technologies to improve the relatively low battery capacity, long charge time, short travel distance, and slow running speed, which are technical problems of electric vehicles.

Recently, in order to overcome the long charging time which is one of the problems of electric vehicles, an interface part for a charging infrastructure for charging electric vehicles has been developed. The interface component for the electric vehicle charging infrastructure includes a charging interface module and a charging stand that connect the vehicle to an external power system and supply electric energy to the vehicle using electric power as an electric power source. The charging stand is a device that corresponds to the existing lubrication equipment, and includes a power control device and a charge monitoring device for linking the electric automobile with the commercial AC power system.

On the other hand, since the electric vehicle charger is closely related to the charging of the electric vehicle, it is very important to secure stability. In addition, in the case of a cord set used at home, it is important to secure stability considering the wiring condition of the home.

Accordingly, it is necessary to periodically control the maximum charging current output through the electric vehicle charger and the cord set.

The maximum charging current is information that must be set essential for the safety of the charging operation of the electric vehicle.

1 is a view showing a charging current setting method of a charging stand according to the prior art.

Referring to FIG. 1, the charging system includes a management server 10, an electric vehicle charger 20, and an electric vehicle 30.

The electric vehicle charger 20 charges the battery of the electric vehicle 30 connected to the charging cable according to the charging information transmitted through the management server 10.

In the first charging current setting method in the charging system, the electric vehicle charger 20 receives the charging current information transmitted through the management server 10, and uses the received charging current information to charge internally. Set the current.

In addition, in the second charging current setting method, the electric vehicle charger 20 receives the charging current information from the outside through a separate cable, and sets the charging current using the received charging current information.

However, such a first charging current setting method requires a separate communication infrastructure, and thus there is a problem in that the charging current information cannot be set in an environment in which the communication infrastructure is not established. In addition, there is a problem that the cost of constructing the communication infrastructure increases.

In addition, the second charging current setting method opens and closes the enclosure of the electric vehicle charger 20 to connect a separate external device to the communication cable, and receives the data through the connected external device to set the internal charging current information do.

However, this may cause a problem in the module inside the electric vehicle charger due to external contaminants (dust, moisture, etc.) because the charger enclosure must be opened and closed. In addition, the charging cable has only a communication port for general pilot communication, and thus there is a problem in that the data cannot be efficiently transmitted / received through the charging cable.
(Patent Document 1) KR10-2011-0112737 A
(Patent Document 2) JP3169439 B
(Patent Document 3) JP2010-259308 A

In accordance with an embodiment of the present invention, there is provided an electric vehicle charger and a charging current setting method thereof that can easily set the maximum charging current of a charger or a cord set without constructing a separate charging infrastructure.

In addition, an embodiment according to the present invention provides a charging current setting means having a sealed structure, to provide an electric vehicle charger and a charging current setting method thereof that can set the operating conditions of the charger without opening and closing the charger enclosure.

It is to be understood that the technical objectives to be achieved by the embodiments are not limited to the technical matters mentioned above and that other technical subjects not mentioned are apparent to those skilled in the art to which the embodiments proposed from the following description belong, It can be understood.

An electric vehicle charger according to an embodiment of the present invention, an electric vehicle charger, comprising: an RFID reader disposed in a main body of the electric vehicle charger and obtaining tag data from an RFID tag; A memory unit for storing tag data obtained through the RFID reader; And a controller configured to store the acquired tag data in a memory unit and to set a charging condition of the electric vehicle using the stored tag data.

In addition, an electric vehicle charger according to another embodiment of the present invention includes a plurality of reed switch unit for performing a switching operation by a magnet; And a controller configured to check an operating state of the plurality of reed switch units and to set a maximum charging current for charging an electric vehicle based on the checked operating states, wherein each of the plurality of reed switch units is provided with a current value. The control unit sets the maximum charging current by using the given current value.

In addition, the charging current setting method of the electric vehicle charger according to an embodiment of the present invention includes the steps of checking the reed switch in a short state of the plurality of reed switch; Checking a current value applied to the checked reed switch; And setting a maximum charging current for charging the electric vehicle using the checked current value.

In addition, the charging current setting method of the electric vehicle charger according to another embodiment of the present invention includes the steps of receiving tag data; Setting a maximum charging current for charging an electric vehicle using the received tag data; And limiting the charging current supplied to the electric vehicle based on the set maximum charging current to charge the battery provided in the electric vehicle.

According to an embodiment of the present invention, in the environment where the charging infrastructure is not established, it is possible to easily set the maximum charging current without using a separate external port, and does not need to open and close the charger enclosure, thereby contaminating dust and moisture. The module inside the charger can be protected from the factor.

In addition, according to an embodiment of the present invention by providing a charging current setting means having a sealed structure, direct contact between the user and the internal wiring of the charger can be blocked to prevent the risk of electric shock.

1 is a view showing a charging current setting method of a charging stand according to the prior art.
2 is a diagram illustrating an electric vehicle charger according to a first embodiment of the present invention.
3 is a diagram showing result information displayed by an embodiment of the present invention.
4 is a detailed block diagram of the RFID reader 110 shown in FIG. 2.
5 is a diagram illustrating an electric vehicle charger according to a second embodiment of the present invention.
FIG. 6 is a view illustrating the reed switch unit shown in FIG. 5.
FIG. 7 is a diagram illustrating an internal configuration of the electric vehicle charger illustrated in FIG. 5.
8 is a flowchart for explaining a charging current setting method according to a first embodiment of the present invention step by step.
9 is a flowchart illustrating a step-by-step method of setting a charging current according to a second embodiment of the present invention.

The following merely illustrates the principles of the invention. Thus, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, only intended for the purpose of enabling understanding of the concepts of the present invention, and are not to be construed as limited to such specifically recited embodiments and conditions do.

It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. It is also to be understood that such equivalents include all elements contemplated to perform the same function irrespective of the currently known equivalents as well as the equivalents to be developed in the future, i.e., the structure.

Hereinafter, in the environment where the charging infrastructure is not established, it is possible to easily set the maximum charging current without using a separate external port and to open and close the charger enclosure, thereby preventing the internal module of the charger from contamination factors such as dust and moisture. The electric vehicle charger that can be protected and its charging current setting method will be described.

2 is a diagram illustrating an electric vehicle charger according to a first embodiment of the present invention.

The electric vehicle charger may include only the charger stand itself. Alternatively, the electric vehicle charger may be a cord set connecting the charger stand and the electric vehicle, and may be a concept including both the stand and the cord set.

The electric vehicle charger 100 is connected to the electric vehicle, and supplies power to the battery provided in the electric vehicle at the request of the driver who owns the electric vehicle.

The electric vehicle charger 100 detects that the electric vehicle is connected through a cord set, and accordingly, supplies electric power to the electric vehicle through the cord set in response to a charging request requested by a driver of the electric vehicle.

In this case, the electric vehicle charger 100 generally includes an RFID reader 110. The RFID reader 110 is a device for recognizing a driver of the electric vehicle, and recognizes a driver of the electric vehicle by recognizing the approach of an RFID tag (card) in which the driver's information is stored, thereby recognizing the driver. The amount of power required by a driver is supplied to the battery provided in the electric vehicle.

In addition, the electric vehicle charger 100 selects an appropriate voltage and current of the power supplied to the battery based on the unique information of the battery provided in the electric vehicle, the voltage value and the current value of each cell constituting the battery. And supply the selected appropriate voltage and current to the battery.

For example, the electric vehicle charger 100 may prevent damage to the battery cells of the electric vehicle, improve the battery performance, and extend the life of the battery. An appropriate voltage and current are selected based on the above, and the appropriate voltage and current are supplied to the battery to charge the battery.

Therefore, by supplying the appropriate voltage and current required for the battery to the battery, it is possible to prevent damage to the battery cell of the electric vehicle, and to extend the life while improving the performance of the battery.

The electric vehicle charger 100 includes a storage medium therein, and the storage medium stores firmware or setting information for the operation of the electric vehicle charger 100.

Firmware generally refers to a micro program that controls hardware stored in a ROM. It is the same as software in terms of program, but it is distinguished from general application software in that it is closely related to hardware. Therefore, firmware has both characteristics of software and hardware. For example, if you make hardware that functions, if you make all the circuits that control it only in hardware, the structure becomes very complicated and even difficult to express logically. In such a case, a large part of the software can be replaced, but the memory stored in the software is configured as a central part of the control circuit of the hardware, which can solve the problem very simply and at low cost. The hardware software thus created is called firmware.

The setting information includes information necessary for the operation of the electric vehicle charger 100 or information necessary during the operation. The setting information includes the maximum charging current allowed by the electric vehicle charger 100.

The maximum charging current means a limit value of the charging current provided to the electric vehicle when the charging operation of the electric vehicle is performed.

That is, when the electric vehicle is charged by using the charging current higher than the maximum charging current, the electric vehicle charger 100 may be overwhelmed, so the maximum charging current is the safety of the electric vehicle charger 100. Information that is set for.

Hereinafter, a method of setting a maximum charging current according to a first embodiment of the present invention will be described. The method of setting the maximum charging current may be performed by using the RFID reader 110 provided as it is without additional hardware configuration. The maximum charging current information is received and the maximum charging current is set based on the maximum charging current information.

An electric vehicle charging system according to a first embodiment of the present invention includes an electric vehicle charger 100 and an RFID tag (not shown).

The RFID tag stores information for setting the maximum charging current of the electric vehicle charger 100, and thus transmits the stored information to the electric vehicle charger 100.

The electric vehicle charger 100 receives the information transmitted through the RFID tag, and sets the maximum charging current using the received information.

Hereinafter, the configuration of the electric vehicle charger 100 will be described in more detail.

As illustrated in FIG. 2, the electric vehicle charger 100 includes an RFID reader 110, a memory 120, a display 130, and a controller 140.

The RFID reader 110 recognizes an RFID tag approaching the surroundings, and accordingly acquires tag data stored in the recognized RFID tag.

In this case, the RFID tag approaching around the RFID reader 110 may be an RFID tag possessed by the driver to perform a charging operation of the electric vehicle, or alternatively, an RFID tag storing information for setting a maximum charging current. .

As the RFID tag approaches, the RFID reader 110 acquires tag data stored in the RFID tag, and transfers the acquired tag data to the controller 140.

The memory unit 120 stores information necessary for the operation of the electric vehicle charger 100.

The memory unit 120 may include a flash memory type, a hard disk type, a multimedia card micro type, and a card type memory (for example, SD or XD memory). It may include at least one type of storage medium, RAM, ROM (EEPROM, etc.).

The display unit 130 outputs information on the state of charge of the electric vehicle.

In this case, the display unit 130 includes a voice output unit (speaker) for outputting information on the state of charge as a voice signal, and an image output unit (display unit) for outputting information about the state of charge through a display screen. can do.

The display unit 130 may display a charging line, an idle charging station, an estimated charging time, a charging progress, a charged amount, and customer information through a table and a graphic. In addition, the data provided through the display unit 130 may be provided so that the customer can grasp the charging progress in advance through the large display device in the charging station, and furthermore, the charging is transmitted to the customer's electric vehicle internal system or portable terminal Status information can also be reported.

In addition, the display unit 130 according to an embodiment of the present invention further displays the maximum charging current information set through the RFID tag.

 For example, the display unit 130 additionally displays operation state information indicating the maximum charging current setting, result information according to the maximum charging current setting, and the like.

The controller 140 controls the overall operation of the electric vehicle charger.

More specifically, when the electric vehicle is connected through a charging cable, the controller 140 supplies power to a battery provided in the electric vehicle according to an external request.

In addition, when the approach of the RFID tag for setting the maximum charging current is detected, the controller 140 sets the maximum charging current by using data stored in the accessed RFID tag.

To this end, when a specific RFID tag approaches the RFID reader 110, the controller 140 receives tag data stored in the accessed RFID tag. In this case, the tag data may be tag data for setting a maximum charging current, and may alternatively be authentication information of a driver for starting charging.

Accordingly, the controller 140 determines whether the tag data is tag data for setting the maximum charging current or authentication information of the driver, and controls subsequent operations.

For example, if the acquired tag data is the driver's authentication information, the controller 140 controls the charging operation of the battery included in the electric vehicle according to the driver's authentication result.

In addition, if the acquired tag data is tag data for setting the maximum charging current, the controller 140 stops the charging operation and proceeds with setting the maximum charging current using the received tag data.

That is, when the tag data includes information corresponding to the maximum charging current, the controller 140 stores the acquired tag data in the memory unit 120 and accordingly stores the maximum charging current according to the stored information. To control the charging operation of the electric vehicle.

When the maximum charging current setting process using the acquired tag data is completed, the control unit 140 displays the information according to the result of the setting process on the display unit 130.

3 is a diagram showing result information displayed by an embodiment of the present invention.

Referring to FIG. 3, when the RFID tag in which tag information for setting the maximum charging current is set to '5A' is recognized, for example, the controller 140 sets the maximum charging current to 5A and accordingly the maximum charging. Information indicating that the current is set to 5A is displayed through the display.

In addition, when the maximum charging current is set, the controller 140 controls a pilot signal based on the set maximum charging current to control the charging current supplied to the electric vehicle connected to the code set.

4 is a detailed block diagram of the RFID reader 110 shown in FIG. 2.

Referring to FIG. 4, the RFID reader 110 includes an antenna 111, an RFID modem 112, a communication unit 113, a power supply unit 114, and a reader controller 115.

The antenna 111 recognizes the approached RFID tag according to the RF signal generated from the RFID reader 110 and accordingly detects tag data stored in the RFID tag.

In this case, the antenna 111 may detect the tag data based on the RF signal of the HF band. Alternatively, the antenna 111 may detect the tag data based on the RF signal of the UHF band.

The RFID modem 112 receives tag data obtained through the antenna 111.

The communication unit 113 may be connected to a separate external device and transmit the detected tag data.

The power supply unit 114 supplies driving power to each component constituting the RFID reader 110.

The reader controller 115 controls the overall operation of the RFID reader 110.

In particular, the reader controller 115 recognizes the acquired tag data and transfers the recognized tag data to the controller 140.

According to an embodiment of the present invention, in the environment where the charging infrastructure is not established, it is possible to easily set the maximum charging current without using a separate external port, and does not need to open and close the charger enclosure, thereby contaminating dust and moisture. The module inside the charger can be protected from the factor.

5 is a diagram illustrating an electric vehicle charger according to a second embodiment of the present invention.

Referring to FIG. 5, the electric vehicle charger 200 includes a main body 210 forming an appearance and a reed switch unit 220 formed on the main body 210 and performing a switching operation by the magnet 300. Include.

The reed switch unit 220 includes a plurality, and different currents are set in the reed switch units.

For example, the reed switch unit 220 may be configured in four, and each of the reed switch units may be set to different currents, such as 1A, 5A, 10A, and 15A.

Hereinafter, the reed switch unit 220 will be described in more detail.

FIG. 6 is a view illustrating the reed switch unit shown in FIG. 5.

Referring to FIG. 5, the reed switch unit 220 is formed in the main body of the electric vehicle charger 200, an insertion groove 222 providing a space in which the magnet 300 can be inserted, and the insertion groove ( A reed switch 224 formed in the 222 and disposed in the insertion groove 222 and performing a switching operation by a magnet 300 inserted into the insertion groove 222, and of the reed switch 224. LED 216 selectively emits light by a switching operation.

Insertion groove 222 may be formed on the upper portion of the main body 210.

The insertion groove 222 may be formed to be larger than the size of the magnet 300 inserted into the insertion groove 222.

As the magnet 300 is inserted into the insertion groove 222, a separation preventing means for preventing the separation of the magnet 300 may be further formed.

The detachment preventing means may be a cover member which blocks the inside of the insertion groove 222 from the outside in response to the operation of the reed switch 224 performing the switching operation as the magnet 300 is inserted.

The reed switch 224 is formed in the insertion groove 222, and performs a switching operation as the magnet 300 is inserted into the insertion groove 222.

For example, when the magnet 300 is inserted into the insertion groove 222, the reed switch 224 performs a short-circuit operation, and when the magnet 300 inserted into the insertion groove 222 is drawn out. The reed switch 224 performs an opening operation.

The LED 226 emits light in conjunction with the operation of the reed switch 224. For example, the LED 226 generates light in conjunction with the operation of the reed switch 224 when the reed switch 224 is short-circuited. On the contrary, when the reed switch 224 is opened, the LED 226 stops the light generation operation in conjunction with the operation of the reed switch 224.

In other words, the LED 226 performs light emission only within the shorting condition of the reed switch 224.

The LED 226 provides operation state information of the reed switch unit corresponding to the open reed switch in order to easily distinguish the reed switch opened from the outside and the shorted reed switch.

FIG. 7 is a diagram illustrating an internal configuration of the electric vehicle charger illustrated in FIG. 5.

Referring to FIG. 7, the electric vehicle charger 200 includes a main body 210, a reed switch unit 220, and a controller 230.

The controller 230 is connected to the plurality of reed switch units 220, respectively, and checks the reed switch unit 220 in a short-circuit operation state by the insertion of the magnet 300.

That is, the controller 230 checks the reed switch unit 220 in which the magnet 300 is inserted into the insertion groove.

When the reed switch unit 220 in which the magnet 300 is inserted is checked, the controller 230 sets the maximum allowable current of the electric vehicle charger using the current set in the checked reed switch unit 220. .

For example, the reed switch unit 220 may include a first reed switch unit having 1 A set, a second reed switch unit set with 5 A, a third reed switch unit set with 10 A, and a fourth reed switch unit set with 15 A, When the magnet 300 is currently inserted only in the third reed switch unit, and a short circuit of the reed switch existing in the third reed switch unit occurs, the controller 230 controls the current 10A set in the third reed switch unit. Set to the maximum allowable current.

In addition, when the plurality of reed switch units are in a short circuit state, the controller 230 sets the sum of the currents set in the plurality of reed switch units in the short state to the maximum allowable current.

For example, when the first reed switch unit and the second reed switch unit are short-circuited in the reed switch unit configured as described above, the controller 230 may include 1A set in the first reed switch unit and the second reed switch unit. Set 6A, the sum of 5A set in, as the maximum allowable current.

8 is a flowchart for explaining a charging current setting method according to a first embodiment of the present invention step by step.

Referring to FIG. 8, first, the electric vehicle charger 100 and the RFID tag maintain a standby state for mutual communication (step 110). In this case, the RFID tag 200 may be an RFID tag that stores driver's authentication information for a charging operation. Alternatively, the RFID tag 200 may be an RFID tag in which setting information for setting a maximum charging current is stored.

Hereinafter, the RFID tag 200 approaches the electric vehicle charger 100 (step 120), and accordingly, the electric vehicle charger 100, specifically, the RFID reader 110 may access the RFID tag 200. Detect (step 130).

Accordingly, the RFID tag 200 transmits the tag data stored therein to the electric vehicle charger 100 (step 140).

The electric vehicle charger 100 receives tag data transmitted through the detected RFID tag (reader) 200 (step 150).

Thereafter, the electric vehicle charger 100 uses the received tag data to determine whether the approached RFID tag (reader) is an RFID tag in which authentication information for driver authentication is stored or setting information for setting a maximum charging current is stored. It is determined whether it is an RFID tag (step 160).

As a result of the determination (step 160), if the tag data is setting information for setting the maximum charging current, the maximum charging current is set using the tag data (step 170).

In operation 160, when the tag data corresponds to authentication information for driver authentication, a preparation operation for performing a charging operation of an electric vehicle is performed using the tag data (step 180).

9 is a flowchart illustrating a step-by-step method of setting a charging current according to a second embodiment of the present invention.

9, the electric vehicle charger 100 monitors the operation of the reed switch (step 210).

That is, the electric vehicle charger 100 monitors whether the operation state of the plurality of reed switches is changed. An operation state of the plurality of reed switches is changed by a magnet. That is, the reed switch is shorted as the magnet is inserted into the insertion groove, and is opened as the inserted magnet is drawn out.

The electric vehicle charger 100 determines whether a specific reed switch responds according to the monitoring in operation 220. That is, the electric vehicle charger 100 determines whether there is a reed switch whose operation state is changed according to the monitoring.

As a result of the determination (step 220), if the reacted reed switch exists, the reed switch operating in the short-circuit state is checked at this point, and the current set in the checked reed switch is checked (step 230).

If the current is confirmed, the maximum allowable current is set using the checked current (step 240).

For example, when there is one reed switch in the short circuit state and the current set in the reed switch is 5A, the electric vehicle charger 100 sets the maximum allowable current to 5A. Alternatively, if there are two reed switches in the short-circuit state, and the currents set at the two reed switches are 5A and 10A, respectively, the electric vehicle charger 100 sets 15A, which is the sum of 5A and 10A, as the maximum allowable current.

According to an embodiment of the present invention, in the environment where the charging infrastructure is not established, it is possible to easily set the maximum charging current without using a separate external port, and does not need to open and close the charger enclosure, thereby contaminating dust and moisture. The module inside the charger can be protected from the factor.

In addition, according to an embodiment of the present invention by providing a charging current setting means having a sealed structure, direct contact between the user and the internal wiring of the charger can be blocked to prevent the risk of electric shock.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, 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 present invention.

100, 200: electric car charger
110: RFID reader
111: antenna 112: RFID modem
113: communication unit 114: power supply unit
115: reader control unit
120: memory unit
130:
140, 230: control unit
210: main body
220: reed switch unit

Claims (12)

In the electric car charger,
An RFID reader disposed in a main body of the electric vehicle charger and obtaining tag data from an RFID tag;
A memory unit for storing tag data obtained through the RFID reader; And
A control unit for storing the acquired tag data in a memory unit and setting a charging condition of an electric vehicle using the stored tag data;
The tag data,
An electric vehicle charger comprising information for setting the maximum charging current of the electric vehicle charger. delete The method of claim 1,
The control unit,
And an electric vehicle charger for limiting a charging current for power transmitted to the electric vehicle based on the set maximum charging current. The method of claim 1,
Further comprising a display unit for displaying information indicating the setting of the maximum charging current,
The displayed information includes information indicating that the maximum charging current is currently being set and a maximum charging current value set based on the tag data. A plurality of reed switch units performing a switching operation by a magnet; And
A control unit which checks an operation state of the plurality of reed switch units and sets a maximum charging current based on the checked operation state;
Each of the plurality of reed switch units is provided with a current value,
The control unit, the electric vehicle charger for setting the maximum charging current to be supplied to the electric vehicle using the given current value. 6. The method of claim 5,
Each of the plurality of reed switch units,
An insertion groove formed in the main body forming an external appearance,
And a reed switch disposed in the insertion groove and performing a switching operation as a magnet is inserted into the insertion groove. The method according to claim 6,
The control unit,
The electric vehicle charger which checks the current value of the reed switch which is in the short circuit state by the said magnet, and sets to the said maximum charging current based on the said confirmed current value. 8. The method of claim 7,
The control unit,
If there are a plurality of reed switches in the shorted state, the current value applied to the reed switch in the shorted state is set to the maximum charging current,
And a plurality of reed switches in the short-circuit state, wherein the sum of the current values applied to the plurality of reed switches is set to the maximum charging current. 8. The method of claim 7,
Each of the reed switch unit,
And an LED connected to the reed switch and configured to emit light when the reed switch is short-circuited to display operation state information of the reed switch. Identifying a reed switch in a short state among the plurality of reed switches;
Checking a current value applied to the checked reed switch; And
The charging current setting method of the electric vehicle charger comprising the step of setting the maximum charging current using the identified current value. The method of claim 10,
Setting the maximum charging current,
Setting the current value applied to the reed switch to the maximum charging current when the number of the reed switches is confirmed;
And setting the sum of the current values respectively provided to the plurality of reed switches to the maximum charging current, if the identified reed switches are plural. Receiving tag data;
Setting a maximum charging current for charging an electric vehicle using the received tag data; And
And charging the battery provided in the electric vehicle by limiting the charging current supplied to the electric vehicle based on the set maximum charging current.

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