KR20200016438A - Multi-charging System for Electric Vehicle - Google Patents

Abstract

The present invention relates to an electric vehicle multiple-charging system capable of variable charging and, more specifically, to an electric vehicle multiple-charging system capable of variable charging, which simultaneously charges a plurality of electric vehicles by receiving one AC power, adjusts differently power to be charged for each electric vehicle, and provides a charging state such as instantaneous voltage, the power, the charging speed, the temperature, etc. of each electric vehicle being charged and charging information according to a charging amount.

Description

Multi-charging System for Electric Vehicle with Variable Charging

The present invention relates to an electric vehicle multiple charging system capable of variable charging, more specifically, to receive a single AC power to charge a plurality of electric vehicles at the same time, the power to be charged for each electric vehicle can be adjusted differently, for each charger The present invention relates to an electric vehicle multiple charging system capable of variable charging, which provides charging information according to the state of charge and the amount of charge such as instantaneous voltage, power, charging speed, and temperature of the electric vehicle being charged.

The present invention relates to an electric vehicle multiple charging system capable of variable charging.

In order to reduce environmental dependence, such as improving air quality and reducing CO2 emissions, and to reduce oil dependence, development of eco-friendly vehicles has emerged as a big issue for the future automobile industry, and major countries in the world are pushing for electric vehicles.

In response to climate change, the government announced that it plans to replace 100% of electric vehicles in Jeju by 2030 with the announcement of the VIP meeting of the Climate Change Party in Paris. At the same time, it is attracting attention as one of the six new energy industries. In order to materialize such governmental interests and to promote the growth of the domestic electric vehicle market, which was the initial level, the third basic plan for developing and distributing the environment-friendly car was prepared in December 2015.

However, despite the aggressive government efforts to foster the electric vehicle industry, actual electric vehicle dissemination results are insufficient. There are many reasons, such as long charging times, short mileage, and expensive vehicle prices. However, the difficulties caused by the lack of charging infrastructure are major obstacles to the spread of electric vehicles.

In the conventional electric vehicle charging system, a single electric vehicle is charged with one AC power. Recently, multiple charging systems capable of charging a plurality of electric vehicles with one input power have been proposed, but there is a problem in that the configuration of the charger is complicated. In addition, in order to connect to a charger installed in a sequential manner or not installed at the same time, a large number of power cables are required, and the manufacturing and installation costs are excessively demanded. It is difficult to grasp, and there is a disadvantage that acquisition of billing information is not easy.

Republic of Korea Patent No.: 10-1198539 Republic of Korea Patent No.: 10-1813523 Republic of Korea Patent No.: 10-1391658

The present invention aims to solve the above problems of the prior art.

Specifically, an object of the present invention is a power distribution box consisting of a power distribution unit, a power distribution device, and the like, including a plurality of chargers that can be installed in any location, easy to install, and using a small power cable It is possible to provide charging power to the charger to provide multiple charging systems that can reduce installation costs.

In addition, the amount of charging power can be flexibly changed during charging, enabling effective control of the charging time according to the state of charge of the electric vehicle, and a charging force measuring device for measuring the amount of charge is installed at the front of the charging port to monitor individual charges and the state of charge. It is an object of the present invention to provide an electric vehicle multiple charging system capable of easily variable charging.

Technical problems to be achieved by the present invention are not limited to the above-mentioned problems, and other technical problems not mentioned above may be clearly understood by those skilled in the art to which the present invention pertains. There will be.

In order to achieve the above object, the multi-charging system capable of variable charging according to the present invention includes a plurality of chargers for supplying any one or more of AC power and DC power to the electric vehicle, and are connected to the plurality of chargers and applied from outside. It is characterized in that it comprises a power distribution box for distributing power to supply AC power or DC power to the plurality of chargers, and to display the state of charge of the plurality of chargers.

The power distribution box may include: a power meter for measuring AC power drawn into the power divider; a status display unit for receiving and displaying a charging state of the charger; and distributing incoming AC power through the power meter to distribute AC power to the charger. An AC distribution device for supplying, an AC / DC converter for converting the incoming AC power into DC power, a DC distribution device for supplying DC power to the charger by distributing the DC power converted from the AC / DC converter, and the respective chargers; Performs communication, and controls the AC distributor, the AC / DC converter, and the DC distributor according to the communication value of each charger, and transfers the charger status for each charger to the status display unit so that the charger status is displayed. Characterized by including a main fisherman.

It characterized in that it comprises a display unit for displaying the state of charge of the charger.

The charger receives AC power from the power distribution box and converts it into DC power to perform slow charging. A slow charging unit measures a slow charge amount, and receives DC power from the power distribution box and converts the DC power into DC power to perform rapid charging. And a sub-control unit configured to receive the rapid charge amount from the slow charge unit, and to receive the rapid charge amount from the rapid charge unit and to transmit the rapid charge amount to the power distribution unit.

The quick charging unit receives a DC power from the power distribution box DC / DC conversion unit for DC / DC conversion, a first charging port for supplying the power converted by the DC / DC conversion unit to the electric vehicle, the first charging port A first measurement unit formed between the DC / DC converters to measure any one or more of power, power, voltage, current, power factor, and temperature charged through the first charging port, and transmit the measured power to the sub-control unit; And a serial relay connected in series between the first measurement unit and the DC / DC converter to adjust the amount of power supplied to the first charging port.

The quick charging unit includes at least two DC / DC converters, at least two first measurement units corresponding to at least two DC / DC converters, at least two series relays, and at least two series It characterized in that it comprises one or more parallel relay for connecting the relay in parallel.

The slow charging unit receives AC power from the power distribution box and converts AC into DC, a second charging port for supplying electric power converted by the AC / DC conversion unit to the electric vehicle, the second charging port, And a second measurement unit formed between the AC / DC converters to measure any one or more of power, power, voltage, current, power factor, and temperature charged through the second charging port, and transmit the measured or more to the sub-control unit. It features.

The power distribution box, the communication between the charger is characterized by using a wireless communication method including any one or more of the Internet of Things, Zigbee, Wi-Fi.

As described above, the present invention includes a power distribution box composed of a device and a power distribution device necessary for faucet, can be installed at any position, and includes a plurality of chargers that can be easily installed, and can be installed in many chargers using a small power cable. The ability to provide charging power has the effect of providing multiple charging systems that can reduce installation costs.

In addition, the amount of charging power can be flexibly changed during charging, enabling effective control of the charging time according to the state of charge of the electric vehicle, and a charging force measuring device for measuring the amount of charge is installed at the front of the charging port to monitor individual charges and the state of charge. It has the effect of providing an electric vehicle multiple charging system capable of easily variable charging.

The technical effects of the present invention are not limited to the above-mentioned technical effects, and other technical effects not mentioned above may be clearly understood by those skilled in the art from the description of the claims. There will be.

1 is a view showing an electric vehicle multiple charging system capable of variable charging according to an embodiment of the present invention.
2 is a view showing an electric vehicle multiple charging system capable of variable charging according to another embodiment of the present invention.
3 is a diagram illustrating a power distribution box structure of FIG. 2.
4 is a view showing the internal structure of the charger in an embodiment of the present invention.
5 is a flowchart of an electric vehicle multiple charging system capable of variable charging according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, the size of the components, the thickness of the line and the like shown in the drawings referred to for describing the present invention may be somewhat exaggerated for convenience of understanding. In addition, since terms used in the description of the present invention are defined in consideration of functions in the present invention, they may be changed according to a user, an operator's intention, and a custom. Therefore, the definition of this term should be made based on the contents throughout the present specification.

Prior to the detailed description of each construction step of the present invention, the terms or words used in the present specification and claims should not be construed as being limited to the ordinary or dictionary meanings, and the inventors should consider the best way to make their own inventions. In order to explain as described above, the concept of terms should be interpreted as meanings and concepts corresponding to the technical spirit of the present invention based on the principle that the concept of terms can be properly defined. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be substituted at the time of the present application It should be understood that there may be equivalents and variations.

When a part of the specification is to "include" any component, this means that it may further include other components, except to exclude other components unless specifically stated otherwise. In addition, the terms "... unit", "module", etc. described in the specification mean a unit for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software. .

Throughout the specification, when a part is "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another element in between. .

1 is a view showing an electric vehicle multiple charging system capable of variable charging according to an embodiment of the present invention.

Referring to FIG. 1, an electric vehicle multiple charging system according to an exemplary embodiment of the present invention includes a power distribution box 101 and a plurality of chargers 102. The power distribution box 101 may include a power distribution device 110 for using the AC power 100 introduced from the outside for slow and rapid charging, a main control unit 108 including a communication module for communication with a charger, and It includes a status display unit 109 for displaying the state of charge. The charger installed at an arbitrary position includes fast and slow charging functions, and transmits and receives information necessary for power distribution and charging through the communication module in the sub-control unit, and measures the state of charge of the charger through the measurement module in the sub-control unit. do. In addition, the sub-control unit may include a control function for charging to remotely control the charging.

When using the charger configuration method of the present invention, by using the AC power input 100 through one power distribution box 101 can simultaneously charge a plurality of electric vehicles requiring different charging, such as slow and rapid, charger Not only is it easy to expand further, it can be managed efficiently as well as reducing installation space and cost.

2 is a view showing an electric vehicle multiple charging system capable of variable charging according to another embodiment of the present invention.

Referring to FIG. 2, a multi-charging system capable of variable charging according to another embodiment of the present invention includes a plurality of chargers 400 and a plurality of chargers 400 supplying at least one of AC power and DC power to an electric vehicle. And a power distribution box 202 for distributing AC power applied from the outside to supply AC power or DC power to the plurality of chargers, and to display the state of charge of the plurality of chargers.

In an embodiment of the present invention, a power cable for supplying power from the power distribution box 202 to the charger 400 may be applied to a one-to-one connection method and a parallel connection method at a charger input terminal, thereby reducing installation costs. .

The power distribution box 202 is a power meter 204 for measuring the incoming power 201 to use as a reference for charging, the status display unit 250 for displaying the charging-related information and status and a plurality of chargers ( Main control unit 203 including a communication module for performing communication with the 400. The main controller 203 uses a wireless communication scheme such as the Internet of Things, Zigbee, Wi-Fi, and the like to enable communication with the sub-control unit 410 included in the plurality of chargers 400 which may be located at any position.

The incoming power 201 through the power metering unit 204 is distributed to a plurality of AC powers 208 through the AC distribution unit 207 and supplied to the slow charging unit 420 and the AC / DC conversion block 209 is provided. After converting AC to DC through the DC charging device for fast distribution to distribute the DC power 210 through a plurality of DC power 211 using a power cable to supply a rapid charging unit 430 of the charger. The power distribution box 202 will be described in more detail later with reference to FIG. 3.

The charger 400 receives the AC power from the AC distribution device 207 of the power distribution box 202, a slow charging unit 420 performing slow charging, and a DC from the DC distribution device 210 of the power distribution box 202. The fast charging unit 430 performs fast charging by receiving electric power, and distributes information such as the slow charging amount from the slow charging unit 420 and the fast charging amount from the fast charging unit 430, including the communication, control, and measurement functions. And a sub-control unit 410 communicating with the main control unit 203 of 202. The sub-control unit 410 includes a display device.

When the user of the charger 400 stops charging or becomes fully charged, the display unit of the sub-control unit 410 and the display unit of the state display unit 205 display the current state, the total charge amount and the charge rate, and the state display unit. In step 205, the charging procedure according to the charging fee is performed.

One or more chargers 400, which may be installed at any position, have one slow charging port 421 connected with the slow charging unit 420 and a plurality of quick charging ports 431 connected with the quick charging unit 430. In FIG. 2, three quick charging ports 431 are illustrated, but in another embodiment, four or more may be provided, and in another example, two may be provided. Charger 400 is a structure capable of slow and rapid charging at the same time, a structure including a sub-control unit 410 having a communication function for controlling the charging conditions and state, and the power distribution 202 and the information for charging It consists of, a plurality of chargers can be configured for power distribution and simultaneous charging.

When a user who wants to charge an electric vehicle requests charging from the display (sub-control unit) of the i-th charger, the corresponding message is transmitted to the status display unit of the power distribution box through wireless communication methods such as IoT, Zigbee, and Wi-Fi. In the simultaneous charging system, if it is possible to charge each charger after checking whether the charger can be charged, the sub-control unit operates the relay to charge the i-th charger according to the command of the main controller.

In one embodiment of the present invention, the charger uses a kiosk for charging. Kiosk is an unmanned information terminal installed in public places such as government agencies, local governments, banks, department stores, and exhibition halls. It provides dynamic traffic information, public transportation information, route guidance, fare card distribution, reservation service, various phone numbers and address information, Provides administrative procedures, product information, usage of facilities, touch screen and sound. graphic. It is an unmanned comprehensive information guide system that provides users with efficient information such as voice service and video by utilizing advanced multimedia devices such as communication cards.

3 is a diagram illustrating the power distribution box 202 of FIG. 2.

Referring to FIG. 3, the power distribution box 202 includes a power metering unit 204, a state display unit 205, an AC distribution unit 207, an AC / DC converter 209, a DC distribution unit 210, and a main control unit ( 203).

The power meter 204 is connected to the AC power 201 introduced into the power distribution box 202, the role for identifying and charging the total amount of charge used in the plurality of chargers 400 connected to the power distribution box 202 Do this. The status display unit 205 receives and displays a charging amount and a charging state of the charger of the charger 400. To this end, the status display unit 25 is configured to include a display unit for displaying the charging amount and the charging state of the charger 400.

The AC distribution device 207 distributes the incoming AC power 201 through the power metering unit 204 according to the number of chargers, and supplies the slow charging AC power 208 to the charger 400.

The AC / DC converter 209 converts the incoming AC power 201 into DC power, and the DC distribution unit 210 distributes the DC power converted by the AC / DC converter 209 according to the number of chargers. Supply DC power 211 to fast charging.

The main control unit 203 includes a communication module for communication with the sub-control unit 410 of the charger 400, and transfers the state of the charging unit 400 to the state display unit 205, the state display unit 205, and the AC. Control of the distribution device 207, the DC distribution device 210 and the like.

In other words, the AC power 201 input to the power distribution box 202 for charging the electric vehicle is first connected to the power metering unit 304. The power meter 204 is installed to determine and charge the total amount of charge used in a plurality of chargers connected to the power distribution box 202. In addition, the power consumption detected by the power meter unit 304 is transmitted to the status display unit 205 is used to display the charge amount and the charging state. The role related to charging, such as transferring or displaying the filling amount, is performed through the main control unit 203.

The AC power passing through the power meter 204 is distributed according to the number of chargers through the AC distribution device 207 and transferred to the charger 400 as a slow charging AC power 208 or to the AC / DC converter 209. By the DC power is converted into the DC distribution device 210. In the DC distribution device 210, the supplied DC power is distributed according to the number of chargers and supplied to the charger as the DC power 211 for rapid charging.

4 is a view showing the internal structure of the charger in an embodiment of the present invention.

Referring to Figure 4 in more detail the internal configuration of the charger according to an embodiment of the present invention charger is composed of a rapid charger 430 and a slow charger 420.

The fast charging unit 430 includes DC / DC conversion units 402a, 402b, 402c, ..., 402z, serial relays 404a, 404b, 404c, ..., 404z, parallel relays 403a, 403b, 403c, ... The part which consists of 1 measuring part 405a, 405b, 405c, ..., 405z, and the 1st charging ports 406a, 406b, 406c, ..., 406z is said.

The DC / DC converters 402a, 402b, 402c, ..., 402z receive DC power from the power distribution box 202 and perform DC / DC conversion, and the first charging ports 406a, 406b, 406c, ..., 406z. Supplies DC power converted by the DC / DC converters 402a, 402b, 402c, ..., 402z to the electric vehicle.

The first measuring units 405a, 405b, 405c, ..., 405z are disposed between the first charging ports 406a, 406b, 406c, ..., 406z and the DC / DC conversion units 402a, 402b, 402c, ..., 402z. Formed and measured any one or more of the DC power, DC power, DC voltage, DC current, temperature charged through the first charging port (406a, 406b, 406c, ..., 406z) and transmits it to the sub-control unit 410.

The serial relays 404a, 404b, 404c, ..., 404z are connected in series between the first measurement units 405a, 405b, 405c, ..., 405z and the DC / DC conversion units 402a, 402b, 402c, ..., 402z. Connected to adjust the amount of power supplied to the first charging port (406a, 406b, 406c, ..., 406z).

The parallel relays 403a, 403b, 403c, ... connect the serial relays 404a, 404b, 404c, ..., 404z in parallel.

The slow charging unit 420 receives an AC power from the power distribution box 202 and converts it into DC. The AC / DC converter 407 converts the DC power from the AC / DC converter 407 and supplies the DC power converted to the electric vehicle. 2 is formed between the charging port 409, the second charging port 409, the AC / DC converter 407, the DC power, DC power, DC voltage, DC current, It includes a second measuring unit 408 for measuring any one or more of the temperature and transmits to the sub-control unit 410.

For example, the configuration of the charger 400 will be described again. First, when the fast charging is desired, DC power is provided through an inlet relay 401 located in the charger 400, and the corresponding DC power is connected to several DCs connected in parallel. The input power is evenly distributed by the / DC converter 402 and the same output power is produced. The relays 403 and 404 in the charger 400 operate differently depending on the number of electric vehicles to be charged and the type of charging. In addition, the charging information (voltage, current, temperature, etc.) obtained through the measurement unit 405 located at the front end of the charging port 406 is transmitted to the sub-control unit 410 and displayed on the display device located in the sub-control unit 410. Rather, the sub-control unit 410 is transmitted to the state display unit 205 through the main control unit 203 of the power distribution box 202 to display / store the current state of charge to be used as data such as charging and power amount analysis.

As an example, it is assumed that an incoming power is 100 kW and three quick charging ports 406a, b, and c are installed. First, an electric vehicle requires charging while another vehicle requires charging. First, when one electric vehicle requires rapid charging (406a), the relays (403a, b) in the serial converter 400 turn on all the relays (404a) located on the charging port and turn on the remaining charging relays. 404b and c are turned off so that all power is supplied to one charging port 406a. The amount of power during charging is measured by the measuring unit 405a and the measurement data is transmitted to the sub-control unit. If the charging 406c needs to be supplied by a new charging request vehicle during the charging process, the 403a of the parallel relays in the charger 400 is turned off or the 403b is turned off and the series relay 404c is turned on. (on) to start charging. The operating condition of the parallel relay is adjusted differently according to the charging state of the existing charging vehicle.

The sub-control unit 410 accumulates the instantaneous values (voltage, current, power factor and temperature, etc.) of the charges collected through the first and second measurement units of each charger, and displays the charge amount up to the corresponding time, and displays the accumulated charge amount. Transfer to the main control unit 203 using a wireless communication method such as the Internet of Things, Zigbee, Wi-Fi.

5 is a flowchart of an electric vehicle multiple charging system capable of variable charging according to an embodiment of the present invention.

Looking at the overall flow of the multi-charging electric vehicle capable of variable charging according to an embodiment of the present invention with reference to Figure 5, when the user wants to fast charge using the charger of any position (i-th) that can be charged, charger When the user requests charging (S101) from the display (sub-control unit) of the i-th charging kiosk, the message is transmitted to the main control unit of the power distribution box through wireless communication methods such as IoT, Zigbee, and Wi-Fi, and the status display unit supports Determine whether the charging is possible in the simultaneous charging system (S102).

It is determined whether charging is possible (S103). If charging is not possible, a charge waiting message is displayed (S112), and the process ends. If charging is possible, the state display unit of the power distribution box approves charging to the sub-controller of the charger (S104), and the sub-controller operates the relay to charge the i-th charger according to the command of the main controller (S105). The charger starts charging and delivers a charging message indicating that the charger is being charged (S106). The measurement unit measures the instantaneous value of the charge amount and transfers it to the sub-control unit. The sub-control unit accumulates the instantaneous charge amount and displays the charge amount up to the corresponding time, and accumulates the accumulated charge amount using wireless communication methods such as the Internet of Things, Zigbee, and Wi-Fi. The control unit transmits the data to the display unit so as to be displayed on the display device of the status display unit (S108).

Then, when the user stops charging or the charging is completed (S109), the total charge amount and the charge rate are displayed on the display device of the sub-control unit and the display device of the state display unit (S110), and the charging unit according to the charge rate is displayed on the state display unit. It performs (S113). Charging should only be performed at the status display of the power distribution box as the charging procedure is necessary.

In addition, when charging is stopped or the charging is completed, the status display unit checks whether the vehicle is waiting for charging (S113), and determines whether it is waiting for charging (S114). After going through the procedure to determine the charging process according to the procedure shown above, if there is no waiting vehicle is terminated.

Although described above with reference to the drawings in accordance with an embodiment of the present invention, those skilled in the art to which the present invention pertains to various applications, modifications and adaptations within the scope of the present invention based on the above contents. will be. Accordingly, the true scope of protection of the invention should be defined only by the appended claims.

101, 202: power distribution
203: main fisherman
204: power metering unit
205: status display unit
207: AC distribution device
209: AC / DC Converter
210: DC distribution device
102, 400: Charger
410: sub-control unit
420: slow charging unit
430: fast charging unit

Claims (8)

A plurality of chargers for supplying at least one of AC power, DC power to the electric vehicle,
It is connected to the plurality of chargers, and distributes the AC power applied from the outside to supply AC power or DC power to the plurality of chargers, characterized in that it comprises a power distribution for displaying the state of charge of the plurality of chargers Electric vehicle multiple charging system capable of variable charging.
The method of claim 1,
The power distribution box
A power meter for measuring AC power drawn into the power divider;
Status display unit for receiving and displaying the state of charge of the charger,
An AC distribution device for supplying AC power to the charger by distributing incoming AC power through the power metering unit;
An AC / DC converter converting the incoming AC power into DC power;
DC distribution device for supplying the DC power to the charger by distributing the DC power converted by the AC / DC converter,
Communicates with each of the chargers, controls the AC distribution device, the AC / DC converter, and the DC distribution device according to the communication value of each charger, and transfers the charging state for each charger to the state display unit, the charging state. Variable charging possible electric vehicle multiple charging system, characterized in that it comprises a main control unit to be displayed.
The method of claim 2
Multi-chargeable electric vehicle multiple charging system, characterized in that it comprises a display unit for displaying the state of charge of the charger.
The method of claim 1,
The charger is
A slow charging unit which receives the AC power from the power distribution box and converts the DC power to perform slow charging and measures a slow charging amount;
A quick charging unit that receives the DC power from the power distribution box and converts the DC power to perform rapid charging, and measures the rapid charging amount;
And a sub-control unit for receiving the slow charge from the slow charging unit, and receiving the fast charge from the fast charging unit and transmitting the fast charge to the power distribution unit.
In accordance with claim 4
The quick charging unit
DC / DC converter for receiving DC power from the power distribution box, DC / DC conversion,
A first charging port for supplying electric power converted by the DC / DC converter to an electric vehicle;
A first battery formed between the first charging port and the DC / DC converter and measuring at least one of power, power, voltage, current, power factor, and temperature charged through the first charging port, and transferring the measured power to the sub-control unit; 1 measuring unit,
And a serial relay connected in series between the first measurement unit and the DC / DC converter to adjust the amount of power supplied to the first charging port. The method of claim 5
The quick charging unit is at least two DC / DC conversion unit,
At least two first measuring units corresponding to at least two DC / DC converters, at least two series relays,
A variable charging possible electric vehicle multiple charging system, characterized in that it comprises one or more parallel relays connecting the two or more serial relays in parallel.
The method of claim 4
The slow charging unit
An AC / DC conversion unit which receives AC power from the power distribution box and converts it into DC;
A second charging port for supplying electric power converted by the AC / DC converter to an electric vehicle;
A second charge port formed between the second charging port and the AC / DC converter to measure any one or more of power, power, voltage, current, power factor, and temperature charged through the second charging port, and transmit the measured power to the sub-control unit; Multiple charging system capable of variable charging, characterized in that it comprises a measurement unit.
The method of claim 1,
The power distribution box, the communication between the charger is an electric vehicle multiple charging system capable of variable charging, characterized in that using a wireless communication method including any one or more of the Internet of Things, Zigbee, Wi-Fi.

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