WO2017119697A1

WO2017119697A1 - Electric vehicle charger

Info

Publication number: WO2017119697A1
Application number: PCT/KR2017/000050
Authority: WO
Inventors: 황호철; 채호병
Original assignee: (주)시그넷시스템
Priority date: 2016-01-05
Filing date: 2017-01-03
Publication date: 2017-07-13

Abstract

The present invention comprises: a plurality of charging modules for supplying a current to at least one electric vehicle; a charging current measurement unit for measuring an amount of current supplied from the charging modules to the electric vehicle; and a control module distributing the current through the charging modules according to the current quantity measured by the charging current measurement unit, so as to supply the current to each of a plurality of electric vehicles.

Description

Electric car charger

The present invention relates to an electric vehicle charger, and more particularly, to an electric vehicle charger for distributing electric power to charge a plurality of electric vehicles.

Recently, the demand for more eco-friendly cars is increasing due to global warming and the depletion of fossil fuels.As a result, automobile manufacturers in each country are quieter driving environment without emitting air pollutants such as CO ₂ while driving. It also develops and manufactures electric vehicles that provide economic benefits.

Electric vehicles are cars that use batteries and electric motors. These electric vehicles move the motor by rotating the electric motor with energy stored in the battery, and the electric vehicle charges the battery from an internal or external power source.

The electric vehicle is driven by a battery, and therefore, the battery must be recharged at any time, and thus an electric vehicle charging station is installed and operated.

However, conventionally, since a single charging device is installed in a space in which one vehicle can be parked, a large parking space and a plurality of charging devices are required to simultaneously charge a plurality of electric vehicles, and as a result, a charging station is installed. It is not easy to operate. Moreover, even if a sufficient parking space and a plurality of charging devices are provided in the charging station, there is a problem that takes a long time to charge the battery of the vehicle.

Background of the present invention is disclosed in the 'system for charging electric vehicles' of Republic of Korea Patent Publication No. 10-2012-0113084 (2012.10.12).

The present invention has been made to solve the above-mentioned problems, an object of the present invention according to an aspect of the present invention is to provide an electric vehicle charger for charging a plurality of electric vehicles by efficiently distributing the power of the charger.

Another object of the present invention is to provide an electric vehicle charger which simultaneously charges a plurality of electric vehicles with one charger, thereby reducing the charging time for the plurality of electric vehicles and improving charging efficiency.

Still another object of the present invention is to provide an electric vehicle charger which continuously improves the operation rate of the charger by continuously operating a plurality of charging modules and increases the operation rate of the electric vehicle.

An electric vehicle charger according to an aspect of the present invention includes a plurality of charging modules for supplying current to at least one electric vehicle; A charging current measuring unit measuring an amount of current supplied to the electric vehicle from the charging module; And a control module for distributing a current through the charging module according to the amount of current measured by the charging current measuring unit and supplying the current to the plurality of electric vehicles.

The control module of the present invention is characterized in that to distribute the current by independently controlling at least one or more of the charging module according to the amount of current measured by the charging current measuring unit.

The control module of the present invention is characterized in that to increase or decrease the current supplied to each of the electric vehicle from the charging module by the current capacity of the charging module.

When the amount of current measured by the charging current measuring unit reaches a predetermined set current amount, the control module of the present invention detects an amount of supplyable current that can be supplied to the electric vehicle, and transmits it to the electric vehicle, which is received from the electric vehicle. The at least one of the charging module is controlled according to the required current amount to distribute the current.

Whenever the amount of current measured by the charging current measuring unit reaches a predetermined set current amount, the control module of the present invention is configured to independently distribute at least one of at least one of the charging modules.

The required current amount of the present invention is characterized by being less than the supplyable current amount.

The required current amount of the present invention may be detected based on the number of batteries in the battery device and the remaining charge of each battery.

The charging module of the present invention comprises a power source for storing power; And a switching module for supplying current supplied from the power source to any one of electric vehicles according to a control signal of the control module.

The switching module of the present invention is installed in a one-to-one correspondence with a coupler for transmitting electric power to an electric vehicle, characterized in that it comprises a plurality of switches to control the current supplied to each electric vehicle.

An electric vehicle charger according to another aspect of the present invention includes a power source for storing power; And a switching module for supplying the current supplied from the power source to any one of the electric vehicles according to the control signal of the control module.

An electric vehicle charger according to another aspect of the present invention includes a plurality of charging modules for supplying current to at least one electric vehicle; A charging current measuring unit measuring an amount of current supplied to the electric vehicle from the charging module; Detects the amount of current that can be supplied to the first electric vehicle according to the amount of current measured by the charging current measuring unit, and supplies the current to the first electric vehicle by controlling the charging module according to the required amount of current received from the first electric vehicle. A first charging control unit outputting information on a charging module capable of supplying current among the charging modules; And whenever the first charging control unit receives information about the charging module capable of supplying current, the supplyable current amount is transmitted to the second electric vehicle, and the charging module is supplied according to the required current amount received from the second electric vehicle. And a second charging control unit which controls each of the two electric vehicles to supply a current of a required current amount to the second electric vehicle.

The first charging control unit of the present invention transmits information on the charging module capable of supplying the current to the second charging control unit whenever the amount of current measured by the charging current measuring unit reaches a preset set current amount. It features.

The first charging control unit of the present invention is characterized in that for reducing the current supplied to each of the electric vehicle from the charging module by the current capacity of the charging module.

The second charging control unit of the present invention is characterized by increasing the current supplied to each of the electric vehicle from the charging module by the current capacity of the charging module.

An electric vehicle charger according to an aspect of the present invention efficiently distributes the power of a charger to charge a plurality of electric vehicles, and in particular, to charge a plurality of electric vehicles simultaneously with one charger to reduce the charging time for a plurality of electric vehicles. And the charging efficiency can be improved.

The electric vehicle charger according to an aspect of the present invention may improve the operation rate of the charger by continuously operating a plurality of charging modules and increase the operation rate of the electric vehicle based on this.

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

2 is a block diagram of a battery device according to an embodiment of the present invention.

3 is a block diagram of a charger according to an embodiment of the present invention.

4 is a block diagram of a charging module according to an embodiment of the present invention.

5 is a diagram illustrating a current distribution section according to an embodiment of the present invention.

6 is a view showing a change in the charging current according to an embodiment of the present invention.

7 is a block diagram showing another example of a control module according to an embodiment of the present invention.

Hereinafter, an electric vehicle charger according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

1 is a block diagram of an electric vehicle charger according to an embodiment of the present invention, Figure 2 is a block diagram of a battery device according to an embodiment of the present invention, Figure 3 is according to an embodiment of the present invention 4 is a block diagram of a charger, FIG. 4 is a block diagram of a charging module according to an embodiment of the present invention, FIG. 5 is a diagram showing a current distribution section according to an embodiment of the present invention, and FIG. 2 is a view illustrating a change in charging current according to an embodiment of the present invention.

Referring to FIG. 1, an electric vehicle charger 10 (hereinafter, simply referred to as a “charger”) according to an embodiment of the present invention may be connected to a plurality of battery devices 20.

Each of the battery devices 20 is installed inside the electric vehicle. Thus, the charger 10 supplies electric current to each electric vehicle to charge the electric vehicle.

That is, the electric vehicle charger 10 according to an embodiment of the present invention may be connected to a plurality of electric vehicles, and distributes the current within the range of the maximum supplyable current to supply to each electric vehicle.

For reference, in the present embodiment, charging of two electric vehicles will be described as an example.

The battery device 20 is installed inside the electric vehicle and electrically connected to the charger 10, receives the supplyable current amount from the charger 10 through bidirectional communication with the charger 10, and based on the supplyable current amount, After detecting, the detected required current amount is transmitted to the charger 10.

Here, the required current amount is a current amount required by the battery device 20 to the charger 10, and may be set to a supply current amount or less. The required current amount may be variously detected to be equal to or less than the supplyable current amount based on the number of batteries 21 in the battery device 20 and the remaining charge amount of each battery 21.

2, the battery device 20 includes a battery 21 and a battery controller 22.

The battery 21 is provided in plural and stores the power supplied from the charger 10.

When the battery controller 22 is electrically connected to the charger 10, the battery controller 22 performs bidirectional communication with the charger 10. The battery controller 22 receives the supplyable current amount from the charger 10, and detects the required current amount to be requested to the charger 10 based on the supplyable current amount.

The battery controller 22 detects the required current amount to be equal to or lower than the supplyable current amount, and may detect various amounts below the supplyable current amount based on the number of batteries 21 and the remaining charge amount of each of the batteries 21.

Subsequently, the battery controller 22 transmits the detected required current amount to the charger 10 to request battery charging.

Thereafter, when the current of the required current amount is supplied from the charger 10, the battery controller 22 checks whether the current of the required current amount is supplied by measuring the amount of current supplied from the charger 10, and stores this current in the battery ( 21 to charge the battery 21, respectively.

Referring to FIG. 3, the charger 10 includes a charging module 11, a charging current measuring unit 12, and a control module 13.

The charging module 11 is provided with a plurality, each of which supplies a current to the battery device 20 of the electric vehicle. For example, when five charging modules 11 are provided and each current capacity is 40A, the maximum supplyable current that can be supplied through the charging module 11 is 200A (5 × 40A).

Each charging module 11 is independently controlled by the control module 13, through which the current supplied to the battery device 20 can be adjusted by 40A within the range of the maximum supplyable current.

Referring to FIG. 4, the charging module 11 includes a power source 111 and a switching module 112.

The power source 111 stores power.

The switching module 112 is connected to each of the electric vehicles through a coupler, and supplies the current supplied from the power source 111 to any one of the electric vehicles.

The switching module 112 includes a first switch 113 and a second switch 114. For reference, in the present embodiment, the connection with two electric vehicles has been described as an example, and thus the switching module 112 includes the first switch 113 and the second switch 114 as an example. However, the technical scope of the present invention is not limited thereto, and a plurality of switches may be further provided according to the number of connectable electric vehicles.

Each of the first switch 113 and the second switch 114 is connected to the power source 111 to interrupt the current supplied to each of the electric vehicles, thereby transferring the current of the power source 111 to any one of the electric vehicles. That is, the first switch 113 is connected one-to-one with the electric vehicle, and the second switch 114 is one-to-one with the other electric vehicle.

Thus, when the first switch 113 is turned on by the control module 13 and the second switch 114 is turned off, the current of the power source 111 is supplied through the first switch 113, When the first switch 113 is turned off by the control module 13 and the second switch 114 is turned on, the current of the power source 111 is supplied through the second switch 114. As such, the current is supplied to any one of the two electric vehicles according to whether the first switch 113 and the second switch 114 are turned on or off.

The charging current measuring unit 12 measures the current supplied to each of the electric vehicles through the charging module 11. For example, when one electric vehicle is connected to the charging module 11, the charging current measuring unit 12 measures the current supplied to the electric vehicle, and two electric vehicles are connected to the charging module 11. In addition, all currents supplied to each electric vehicle are measured.

The control module 13 distributes the current through the charging module 11 according to the amount of current measured by the charging current measuring unit 12 and supplies each of the plurality of electric vehicles.

In more detail, when the electric vehicle is connected to any one of the couplers, the control module 13 includes at least one of whether the charging module 11 is operated, the charging amount of the charging module 11, and the voltage and current capacity of the charging module 11. After detecting the supplyable current amount that can be supplied to the electric vehicle according to one or more, the supplyable current amount is transmitted to the battery device 20.

The battery controller 22 of the battery device 20 receives the supplyable current amount from the charger 10, and detects the required current amount to be requested by the charger 10 based on the supplyable current amount.

The battery controller 22 detects the required current amount to be equal to or lower than the supplyable current amount, and transfers the detected required current amount to the charger 10.

Accordingly, the control module 13 controls the charging module 11 to supply the current of the required current amount to the battery device 20, and the battery control unit 22 is a battery with the current supplied from the charger 10. Charge 21.

Typically, when the electric vehicle is connected, the control module 13 provides the maximum supplyable current to the electric vehicle. For example, when five charging modules 11 are provided and each supplies 40A, the maximum supplyable current amount at this time is within 200A.

Accordingly, as shown in FIG. 5, the control module 13 charges the electric vehicle at 200 A when the first electric vehicle is connected, and this process is performed when the charging rate of the electric vehicle reaches 80% (about 30% of the total charging time). Lasts until. Then, the charging current gradually decreases according to the charging amount of the battery 21, and the charging rate of the battery 21 reaches 100%.

In this process, when the electric vehicle is connected to the remaining coupler, in the section in which the charging current is reduced (hatched section), the control module 13 according to the amount of current measured by the corresponding charging current measuring unit 12 ( 11) Supply currents output from at least one of them to different electric vehicles.

Since the charging current gradually decreases in the charging process as described above, the control module 13 gradually transfers the surplus current, that is, at least one or more currents of the five charging modules 11 to another newly connected electric vehicle. Supply.

In this case, the control module 13 controls the charging module 11 to increase or decrease the current supplied from the charging module 11 to each of the electric vehicles step by step according to the preset current capacity of the charging module 11. . In this case, the control module 13 controls the charging module 11 independently to distribute the current, so that the amount of current supplied to each electric vehicle increases or decreases the current by the current capacity of the charging module 11.

Here, when the first switch 113 is turned on and the second switch 114 is turned off, the current of the power source 111 is supplied through the first switch 113, and the first switch 113 is turned on. When it is off and the second switch 114 is turned on, the current of the power source 111 is supplied through the second switch 114.

Accordingly, the control module 13 turns on and off each of the first switch 113 and the second switch 114 of each of the charging modules 11, so that each charging module 11 has a current in any one of the two electric vehicles. To be supplied. This controls the amount of current supplied to each of the two electric vehicles.

For reference, a case in which the first electric vehicle is connected to the first switch 113 and the second electric vehicle is connected to the second switch 114 will be described as an example. For convenience of description, the two electric vehicles will be described as being divided into a first electric vehicle and a second electric vehicle.

Referring to FIG. 6, the control module 13 turns on the first switch 113 of each charging module 11 and turns off the second switch 114 to supply 200 A of current to the first electric vehicle. do.

Thereafter, the current supplied to the first electric vehicle (first charging current) gradually decreases, and the control module 13 controls any one or more of the five charging modules 11 to supply the current to the second electric vehicle. (Second charging current) is supplied stepwise. This process is performed until the charging for the first electric vehicle is completed.

That is, the control module 13 supplies 40 A current to the second electric vehicle when supplying 160 A of current to the first electric vehicle, and 80 A current to the second electric vehicle when supplying 120 A of current to the first electric vehicle. When supplying a current of 80A to the first electric vehicle supplies a current of 120A to the second electric vehicle, and supplying a current of 160A to the second electric vehicle when supplying a current of 40A to the first electric vehicle, When the charging of the first electric vehicle is completed, a current of 200 A is supplied only to the second electric vehicle.

In this process, whenever the amount of current measured by the charging current measuring unit 12 reaches a preset set amount of current, for example, 190A, 150A, 110A, 70A, the control module 13 includes the first electric vehicle and the first electric vehicle. 2 The amount of current that can be supplied to the electric vehicle is detected respectively, and at least one of the charging modules 11 is controlled according to the required amount of current received from the electric vehicle to distribute the current.

Whenever the amount of current supplied to the first electric vehicle reaches 190A, 150A, 110A, 70A and the amount of supplyable current is transmitted from the control module 13, the battery device 20 of the first electric vehicle is 160A, 120A, 80A. , Respectively, detect the required amount of current of 40A and transmit it to the control module 13, and the battery device 20 of the second electric vehicle detects the required amount of current of 40A, 80A, 120A, and 160A, respectively, and deliver it to the control module 13. do.

Therefore, when the control module 13 supplies a current of 160 A to the first electric vehicle as described above, according to the required current amount received from each of the battery device 20 of the first electric vehicle and the second electric vehicle. 2 When supplying a current of 40A to the electric vehicle, supplying a current of 120A to the first electric vehicle, supplying a current of 80A to the second electric vehicle, and supplying a current of 80A to the first electric vehicle to the second electric vehicle When supplying a current of 120A, 40A current to the first electric vehicle, 160A current to the second electric vehicle, and 200A current only to the second electric vehicle when charging of the first electric vehicle is completed. .

Meanwhile, in the above embodiment, one control module 13 controls each charging module 11 as an example, but the technical scope of the present invention is not limited thereto, and the number of accessible electric vehicles is limited. Accordingly, a plurality of controllers may be provided inside the charger 10.

For example, when two electric vehicles are connectable as in the above-described embodiment, the charger 10 includes a first charging control unit 131 and a first charging unit as shown in FIG. 7 to control charging of each electric vehicle. 2, the charging control unit 132 may be provided, and the first charging control unit 131 may control charging of the first electric vehicle, and the second charging control unit 132 may control charging of the second electric vehicle.

Hereinafter, another example of the control module 13 according to an embodiment of the present invention will be described with reference to FIG. 7.

Referring to FIG. 7, the control module 13 includes a first charging control unit 131 and a second charging control unit 132, and the first charging control unit 131 controls charging of the first electric vehicle, The second charging control unit 132 controls the charging of the second electric vehicle.

That is, the first charging control unit 131 gradually decreases its charging current in the charging process so that each time it reaches a predetermined set current amount, for example, 190A, 150A, 110A, 70A, the first charge control unit 131 can supply the current to the first electric vehicle. Detects and controls at least one or more of the charging module 11 according to the required amount of current received from the first electric vehicle to supply the current of 160A, 120A, 80A and 40A to the first electric vehicle, respectively. To this end, the first charging control unit 131 gradually turns off the first switch 113 of each charging module 11.

In addition, each time the first charging control unit 131 reaches a set current amount, that is, 190A, 150A, 110A, and 70A, the first charging control unit 131 transmits information on the charging module 11 capable of supplying current to the second charging control unit 132. do.

Whenever information about the charging module 11 capable of supplying current is received, the second charging control unit 132 delivers a supplyable current that can be supplied to the second electric vehicle to the second electric vehicle. That is, the second charging control unit 132 may deliver the supplyable current amounts of 40A, 80A, 120A, 160A, and 200A to the second electric vehicle step by step whenever the preset set current amount is reached.

In this case, whenever the second electric vehicle receives the amount of supplyable current from the second charging control unit 132, the second electric vehicle transfers the required current amounts of 40A, 80A, 120A, 160A, and 200A to the second charging control unit 132 step by step. .

As described above, whenever the required current amounts of 40A, 80A, 120A, 160A, and 200A are respectively transmitted, the second charging control unit 132 is provided with the second switch 114 provided in the switching module 112 of each charging module 11, respectively. ) Are respectively supplied to the second electric vehicle with currents of 40 A, 80 A, 120 A, 160 A, and 200 A, respectively.

As such, the electric vehicle charger 10 according to an aspect of the present invention efficiently distributes the power of the charger 10 to charge a plurality of electric vehicles, and in particular, to charge a plurality of electric vehicles simultaneously with one charger 10. By reducing the charging time for a plurality of electric vehicles to improve the charging efficiency, it is possible to increase the operation rate of the electric vehicle based on this.

Although the present invention has been described with reference to the embodiments shown in the drawings, it is merely exemplary and various modifications and equivalent other embodiments are possible to those skilled in the art. I will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

Claims

A plurality of charging modules for supplying current to at least one electric vehicle;

A charging current measuring unit measuring an amount of current supplied to the electric vehicle from the charging module; And

And a control module for distributing a current through the charging module according to the amount of current measured by the charging current measuring unit and supplying the current to the plurality of electric vehicles.
The method of claim 1, wherein the control module

And an electric vehicle charger for distributing current by independently controlling at least one or more of the charging modules according to the amount of current measured by the charging current measuring unit.
The method of claim 1, wherein the control module

The electric vehicle charger, characterized in that for increasing or decreasing the current supplied to each of the electric vehicle from the charging module by the current capacity of the charging module.
The method of claim 1, wherein the control module

Whenever the amount of current measured by the charging current measuring unit reaches a preset set amount of current, the amount of supplyable current that can be supplied to the electric vehicle is detected and transmitted to the electric vehicle, and the charging module according to the required current amount received from the electric vehicle An electric vehicle charger, characterized in that for distributing a current by controlling at least one of the.
The method of claim 4, wherein the control module

Whenever the amount of current measured by the charging current measuring unit reaches a predetermined set current amount, the electric vehicle charger, characterized in that to independently control at least one or more of the charging module to distribute the current.
The method of claim 5, wherein the control module

The electric vehicle charger, characterized in that for increasing or decreasing the current supplied to each of the electric vehicle from the charging module by the current capacity of the charging module.
The electric vehicle charger according to claim 4, wherein the required current amount is equal to or less than the supplyable current amount.
The electric vehicle charger of claim 4, wherein the required current amount is detected based on the number of batteries in the battery device and the remaining charge of each battery.
The method of claim 1, wherein the charging module

A power source for storing power; And

And a switching module for supplying the current supplied from the power source to any one of the electric vehicles according to the control signal of the control module.
The method of claim 9, wherein the switching module

An electric vehicle charger, comprising: a plurality of switches installed to correspond to the coupler for delivering electric power to the electric vehicle to control the current supplied to each electric vehicle.
A power source for storing power; And

An electric vehicle charger comprising a switching module for supplying the current supplied from the power source to any one of the electric vehicle according to the control signal of the control module.
The method of claim 11, wherein the switching module

An electric vehicle charger, comprising: a plurality of switches installed to correspond to the coupler for delivering electric power to the electric vehicle to control the current supplied to each electric vehicle.
A plurality of charging modules for supplying current to at least one electric vehicle;

A charging current measuring unit measuring an amount of current supplied to the electric vehicle from the charging module;

Detects the amount of current that can be supplied to the first electric vehicle according to the amount of current measured by the charging current measuring unit, and supplies the current to the first electric vehicle by controlling the charging module according to the required amount of current received from the first electric vehicle. A first charging control unit outputting information on a charging module capable of supplying current among the charging modules; And

Whenever the first charging control unit receives information about the charging module capable of supplying current, the supply current can be supplied to the second electric vehicle, and the charging modules are respectively supplied according to the required current amount received from the second electric vehicle. An electric vehicle charger comprising a second charging control unit for controlling and supplying a current of the required current amount to the second electric vehicle.
The method of claim 13, wherein the first charging control unit

Whenever the amount of current measured by the charging current measuring unit reaches a predetermined set current amount, the electric vehicle charger, characterized in that for transmitting the information about the charging module capable of supplying the current to the second charging control unit.
The method of claim 14, wherein the first charging control unit

The electric vehicle charger, characterized in that for reducing the current supplied to each of the electric vehicle from the charging module by the current capacity of the charging module.
The method of claim 14, wherein the second charging control unit

The electric vehicle charger, characterized in that for increasing the current supplied to each of the electric vehicle from the charging module by the current capacity of the charging module.