KR102662979B1 - Dual type electirc vehicle charging control apparatus and controlling method thereof - Google Patents

Abstract

According to an embodiment of the present invention, the dual-type electric vehicle charging control device includes a first power pack and a second power pack capable of supplying a first charging current and a second charging current, which are direct currents that can be used by the first electric vehicle and the second electric vehicle, respectively. 2 power pack; A first connector and a second connector to which the first electric vehicle and the second electric vehicle can be connected for charging, respectively;
It is electrically connected to the first connector and the second connector, and is capable of generating and transmitting a first detection signal that detects the connection of the first electric vehicle and a second detection signal that detects the connection of the second electric vehicle. EV sensing unit; a first current distribution unit electrically connected to the first power pack, the first connector, and the second connector, and capable of distributing and supplying the first charging current to the first connector and the second connector; a second current distribution unit electrically connected to the first power pack, the first connector, and the second connector, and capable of distributing and supplying the second charging current to the first connector and the second connector; And it is electrically connected to the first power pack, the second power pack, the EV sensing unit, the first current distribution unit, and the second current distribution unit, and receives the first detection signal and the second detection from the EV sensing unit. and a charging control unit that controls charging of the electric vehicle corresponding to the detection signal through the first and second current distributors when one or more of the detection signals are received.

Description

Dual type electric vehicle charging control device and control method {DUAL TYPE ELECTIRC VEHICLE CHARGING CONTROL APPARATUS AND CONTROLLING METHOD THEREOF}

The present invention relates to a dual-type electric vehicle charging control device, and more specifically, not only does the charging efficiency not deteriorate even when two electric vehicles are charged simultaneously with one electric vehicle charger, but also in the case of electric vehicles that require a large amount of charging request power. This relates to a dual-type electric vehicle charging control device and its control method that can efficiently save charging time.

Recently, with the carbon neutral policy, the development and distribution of electric vehicles that are environmentally friendly and have low maintenance costs are expanding, and various charging technologies are being developed to charge the batteries of electric vehicles.

Generally, to charge the battery of an electric vehicle, one or two charging connectors connected to an electric vehicle charger are connected 1:1 to the electric vehicle to charge the battery.

However, when using two charging connectors as described above, there is a problem that charging efficiency is reduced by charging the two electric vehicles with the same charging current even though the two electric vehicles require different charging request powers. . In addition, in the case of electric vehicles that require a large amount of charging power, it takes a lot of time to charge, and it causes a lot of inconvenience to drivers in that they have to wait a long time until charging is completed.

Republic of Korea Patent Publication No. 10-1297079 (published on August 19, 2013) Republic of Korea Patent Publication No. 10-2021-0149467 (published on December 9, 2021)

The problem to be solved by the present invention is to not only not reduce charging efficiency even when two electric vehicles are simultaneously charged in one electric vehicle charger, but also to efficiently save charging time even for electric vehicles that require a large amount of charging request power. The aim is to provide a dual-type electric vehicle charging control device and its control method.

Other problems to be solved by the present invention will become clearer from the following detailed description and drawings.

According to one embodiment of the present invention, the dual-type electric vehicle charging control device includes a first power pack and a second power pack capable of supplying a first charging current and a second charging current, which are direct currents that can be used by the first electric vehicle and the second electric vehicle, respectively. 2 power pack; A first connector and a second connector to which the first electric vehicle and the second electric vehicle can be connected for charging, respectively;

It is electrically connected to the first connector and the second connector, and is capable of generating and transmitting a first detection signal that detects the connection of the first electric vehicle and a second detection signal that detects the connection of the second electric vehicle. EV sensing unit; a first current distribution unit electrically connected to the first power pack, the first connector, and the second connector, and capable of distributing and supplying the first charging current to the first connector and the second connector; a second current distribution unit electrically connected to the first power pack, the first connector, and the second connector, and capable of distributing and supplying the second charging current to the first connector and the second connector; And it is electrically connected to the first power pack, the second power pack, the EV sensing unit, the first current distribution unit, and the second current distribution unit, and receives the first detection signal and the second detection from the EV sensing unit. and a charging control unit that controls charging of the electric vehicle corresponding to the detection signal through the first and second current distributors when one or more of the detection signals are received.

Here, the first detection signal and the second detection signal may include the first charging request power of the first electric vehicle and the second charging request power of the second electric vehicle, respectively.

And, the charging control unit controls the first current distribution unit so that the first charging current is supplied to the first electric vehicle when the first detection signal is received, and the first charging current is supplied to the first electric vehicle. When the second detection signal is received while being supplied, the distribution ratio of the first charging current and the second charging current can be adjusted by comparing the first charging request power and the second charging request power.

At this time, the first charging current may be composed of a first main charging current supplied to the first connector and a first sub-charging current supplied to the second connector.

Here, the second charging current may be comprised of a second main charging current supplied to the second connector and a second sub-charging current supplied to the first connector.

In addition, the charging control unit controls the second current distributor to supply the second sub-charge current when the second charging request power is less than the first charging request power, and the first charging request power is adjusted to the first charging request power. 2 When the charging request power is less than the first sub-charge current, the first current distribution unit is controlled so that the first sub-charge current is supplied, and the first remaining charging power of the first electric vehicle and the second remaining charging power of the second electric vehicle are adjusted. It is calculated periodically, and when the first remaining charging power and the second remaining charging power are equal, the supply of the first sub-charging current and the second sub-charging current can be stopped.

According to another embodiment of the present invention, the dual-type electric vehicle charging control method is a method of controlling the dual-type electric vehicle charging control device, wherein the first detection signal and the second detection signal are each connected to the first detection signal of the first electric vehicle. 1 Charging request power and the second charging request power of the second electric vehicle may be included, and when the second detection signal is received while the first charging current is being supplied to the first electric vehicle, the first charging An adjustment step of adjusting the distribution ratio of the first charging current and the second charging current by comparing the requested power and the second charging requested power.

Here, the first charging current may be comprised of a first main charging current supplied to the first connector and a first sub-charging current supplied to the second connector.

And, the second charging current may be composed of a second main charging current supplied to the second connector and a second sub-charging current supplied to the first connector.

At this time, in the adjustment step, when the second charging request power is less than the first charging request power, the second sub-charge current is supplied, and when the first charging request power is less than the second charging request power, the first sub-charge current is supplied. It is preferable that this is the stage in which sub-charge current is supplied.

In addition, the dual-type electric vehicle charging control method includes a remaining charging power calculation step of periodically calculating a first remaining charging power of the first electric vehicle and a second remaining charging power of the second electric vehicle; and

It may further include a remaining charging power comparison step of stopping supply of the first sub-charging current and the second sub-charging current if the first remaining charging power and the second remaining charging power are equal.

The dual-type electric vehicle charging control device and control method according to the present invention have the following effects.

First, not only does charging efficiency not deteriorate even when two electric vehicles are charged simultaneously on one electric vehicle charger, but it also has the advantage of efficiently saving charging time even for electric vehicles that require a large amount of charging request power.

Second, even if one electric vehicle (EV1) starts charging while another electric vehicle (EV2) starts charging, there is an advantage in that charging of the two vehicles can be completed at the same time.

1 to 3 are diagrams for explaining a dual-type electric vehicle charging control device according to an embodiment of the present invention.
Figure 4 is a diagram for explaining a dual-type electric vehicle charging control method according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached FIGS. 1 to 4. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as limited to the embodiments described below. These embodiments are provided to explain the present invention in more detail to those skilled in the art. Therefore, the shape of each element shown in the drawing may be exaggerated to emphasize a clearer description.

Throughout the specification, when a part is said to be “connected” to another part, this includes not only cases where it is “directly connected,” but also cases where it is “electrically connected” with another element in between. Additionally, when a part is said to “include” a certain component, this does not mean excluding other components unless specifically stated to the contrary, but may further include other components and one or more other features. It should be understood that it does not exclude in advance the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

1 to 3 are diagrams for explaining a dual-type electric vehicle charging control device according to an embodiment of the present invention.

However, since the dual-type electric vehicle charging control device of FIGS. 1 to 3 is only an example of the present invention, the present invention is not limited to FIGS. 1 to 3.

Referring to FIG. 1, the dual-type electric vehicle charging control device 100 according to this embodiment is for simultaneously charging two electric vehicles (EV1 and EV2), and includes a first power pack 111, a second power pack 112, It includes a first connector 131, a second connector 132, an EV sensing unit 140, a first current distribution unit 121, a second current distribution unit 122, and a charging control unit 110.

The first power pack 111 can convert power supplied from the outside into direct current that can be used by the electric vehicle and supply the first charging current (I₁) to the electric vehicles (EV1 and EV2). The second power pack 112 can convert power supplied from the outside into direct current that can be used by the electric vehicle and supply the second charging current (I₂) to the electric vehicles (EV1 and EV2). At this time, it is preferable that the maximum output current of the first power pack 111 and the second power pack 112 are the same.

The first connector 131 and the second connector 132 are for charging batteries of electric vehicles (EV1 and EV2) and can be electrically connected to the first power pack 111 and the second power pack 112.

The EV sensing unit 140 is electrically connected to the first connector 131 and the second connector 132. When the EV sensing unit 140 detects the connection of the electric vehicle (EV1), it generates a first detection signal and transmits it to the charging control unit 110. The EV sensing unit 140 may transmit the charging request power and battery charge state information transmitted from the electric vehicle EV1 to the charging control unit 110 along with the first detection signal.

. When the EV sensing unit 140 detects the connection of the electric vehicle (EV2), it generates a second detection signal and transmits it to the charging control unit 110. The EV sensing unit 140 may transmit the charging request power and battery charge state information transmitted from the electric vehicle (EV2) to the charging control unit 110 along with the second detection signal.

The first current distribution unit 121 is electrically connected to the first power pack 111, the first connector 131, the second connector 132, and the charging control unit 110. The first current distributor 121 divides the first charge current (I₁) into a first main charge current (I₁₁) and a first sub-charge current (I₁₂) and connects them to the first connector 131 and the second connector 132, respectively. can be supplied.

The second current distribution unit 122 is electrically connected to the second power pack 111, the first connector 131, the second connector 132, and the charging control unit 110. The second current distributor 122 divides the second charging current (I₂) into a second main charging current (I₂₂) and a second sub-charging current (I₂₁) and connects them to the second connector 132 and the first connector 131, respectively. can be supplied.

By doing this, it is possible to supply the first main charging current (I₁₁) and the second sub-charging current (I₂₁) to the electric vehicle (EV1) through the first current distributor 121 and the second current distributor 122. . In addition, it is possible to supply the second main charging current (I₂₂) and the first sub-charging current (I₁₂) to the electric vehicle (EV2).

The charging control unit 110 is electrically connected to the first power pack 111, the second power pack 112, the EV sensing unit 140, the first current distribution unit 121, and the second current distribution unit 122, The first power pack 111, the second power pack 112, the EV sensing unit 140, the first current distribution unit 121, and the second current distribution unit 122 can be controlled.

When the first detection signal is received from the EV sensing unit 140, the charging control unit 110 controls charging of the electric vehicle (EV1) through the first current distribution unit 121 and the second current distribution unit 122. You can.

When the first detection signal is received from the EV sensing unit 140, the charging control unit 110 can control the first charging current (I₁) to be supplied to the electric vehicle (EV1) through the first current distribution unit 121. there is. At this time, if the charging request power transmitted from the electric vehicle (EV1) is more than a preset value, the second sub-charging current (I₂₁) can be controlled to be supplied to the electric vehicle (EV1) through the second current distributor 122. . In addition, when the battery charge state information transmitted from the electric vehicle (EV1) is less than a preset value, the second sub-charge current (I₂₁) can be controlled to be supplied to the electric vehicle (EV1) through the second current distributor 122. there is.

When the second detection signal is received while the first charging current (I₁) is being supplied to the electric vehicle (EV1), the charging control unit 110 determines the first charging request power of the electric vehicle (EV1) and the electric vehicle (EV2). By comparing the second charging request power, the distribution ratio of the first charging current and the second charging current can be adjusted.

When the second detection signal is received while the first charging current (I₁) is being supplied to the electric vehicle (EV1), the charging control unit 110 provides the first charging state information of the battery of the electric vehicle (EV1) and the electric vehicle ( By comparing the second charging state information of the battery of EV2), the distribution ratio of the first charging current and the second charging current can be adjusted.

Specifically, the charging control unit 110 may control the second current distribution unit 122 to supply the second sub-charge current (I₂₁) when the second charging request power is less than the first charging request power. When the first charging state information is less than the second charging state information, the charging control unit 110 may control the second current distribution unit 122 to supply the second sub-charging current (I₂₁).

On the other hand, when the first charging request power is less than the second charging request power, the charging control unit 110 may control the first current distribution unit 121 even if the first sub-charging current (I₁₂) is supplied. . When the second charging state information is less than the first charging state information, the charging control unit 110 may control the first current distribution unit 121 to supply the first sub-charging current (I₁₂).

Meanwhile, the charging control unit 110 may periodically calculate the first remaining charging power of the electric vehicle (EV1) and the second remaining charging power of the electric vehicle (EV2). The charging control unit 110 may stop supplying the first sub-charge current (I₁₂) and the second sub-charge current (I₂₁) when the first remaining charging power and the second remaining charging power are equal. That is, the charging control unit 110 controls the magnitude of the first sub-charge current (I₁₂) and the second sub-charge current (I₂₁) to 0 [A] when the first remaining charging power and the second remaining charging power are equal. can do. At this time, remaining charging power [kW] = charging request power [kW] - charging supply power (power supplied to electric vehicles to date) [kW]

Specifically, it is assumed that the maximum supply current of the first power pack 111 and the second power pack 112 is 100 [A], the first charging request power is 50 [kW], and the second charging request power is 100 [kW]. This explains.

First, when the charging control unit 110 receives the first detection signal from the EV sensing unit 140, it supplies 100 [A] (I₁) to the electric vehicle EV1 through the first current distribution unit 121.

When the second detection signal is received while 100 [A] (I₁) is being supplied to the electric vehicle (EV1), the charging control unit 110 adjusts the first charging request power (50 [kW]) to the second detection signal. 2 Since the charging request power (100 [kW]) is less than 50 [A] (I₁₂), the first current distribution unit 121 can be controlled even if 50 [A] (I₁₂) is supplied to the electric vehicle (EV2). That is, from this point on, a charging current of 50 [A] (I₁-I₁₂) begins to be supplied to the electric vehicle (EV1), and a charging current of 150 [A] (I₂+ I₁₂) begins to be supplied to the electric vehicle (EV2). ,

Figure 4 is a diagram for explaining a dual-type electric vehicle charging control method according to an embodiment of the present invention. Hereinafter, a dual-type electric vehicle charging control method according to an embodiment of the present invention will be described with reference to FIG. 4. Hereinafter, in the process of explaining each step, content that overlaps with the part described with reference to the dual-type electric vehicle charging control device described above will be omitted or briefly described.

First, when the first detection signal is received from the EV sensing unit 140, the charging control unit 110 controls the first charging current (I₁) to be supplied to the electric vehicle (EV1) through the first current distribution unit 121. can do. At this time, if the charging request power transmitted from the electric vehicle (EV1) is more than a preset value, the second sub-charging current (I₂₁) can be controlled to be supplied to the electric vehicle (EV1) through the second current distributor 122. . In addition, when the battery charge state information transmitted from the electric vehicle (EV1) is less than a preset value, the second sub-charge current (I₂₁) can be controlled to be supplied to the electric vehicle (EV1) through the second current distributor 122. there is.

Next, when the second detection signal is received while the first charging current (I₁) is being supplied to the electric vehicle (EV1), the charging control unit 110 determines the first charging request power of the electric vehicle (EV1) and the electric vehicle. By comparing the second charging request power of (EV2), the distribution ratio of the first charging current and the second charging current can be adjusted (S10).

Next, the charging control unit 110 may control the second current distribution unit 122 to supply the second sub-charge current (I₂₁) when the second charging request power is less than the first charging request power ( S20). When the first charging state information is less than the second charging state information, the charging control unit 110 may control the second current distribution unit 122 to supply the second sub-charging current (I₂₁).

On the other hand, when the first charging request power is less than the second charging request power, the charging control unit 110 may control the first current distribution unit 121 even if the first sub-charging current (I₁₂) is supplied. (S20). When the second charging state information is less than the first charging state information, the charging control unit 110 may control the first current distribution unit 121 to supply the first sub-charging current (I₁₂).

Next, the charging control unit 110 may periodically calculate the first remaining charging power of the electric vehicle (EV1) and the second remaining charging power of the electric vehicle (EV2) (S30).

Next, the charging control unit 110 may stop supplying the first sub-charge current (I₁₂) and the second sub-charge current (I₂₁) when the first remaining charging power and the second remaining charging power are equal ( S40). That is, the charging control unit 110 limits the magnitude of the first sub-charge current (I₁₂) and the second sub-charge current (I₂₁) to 0 [A] when the first remaining charging power and the second remaining charging power are the same. can do. At this time, remaining charging power [kW] = charging request power [kW] - charging supply power (power supplied to electric vehicles to date) [kW]

As a result, the dual-type electric vehicle charging control device 100 according to the present invention not only does not reduce charging efficiency even when two electric vehicles (EV1 and EV2) are simultaneously charged in one electric vehicle charger, but also allows one electric vehicle (EV1) Even if another electric vehicle (EV2) starts charging during charging, the two vehicles can complete charging at the same time.

Although the present invention has been described in detail through preferred embodiments, other embodiments are also possible. Therefore, the technical spirit and scope of the claims set forth below are not limited to the preferred embodiments.

100: Dual type electric vehicle charging control device 110: Charging control unit
111: 1st power pack 112: 2nd power pack
121: first current distribution unit 122: second current distribution unit
131: first connector 132: second connector
140: EV sensing unit I₁: first charging current
I₂: Second charging current I₁₁: First main charging current
I₁₂: 1st sub-charge current I₂₂: 2nd main charge current
I₂₁: 2nd sub-charge current EV1: 1st electric vehicle EV1: 1st electric vehicle
EV2: Second electric vehicle

Claims (6)

A first power pack and a second power pack that are capable of supplying a first charging current and a second charging current, which are direct currents that can be used by the first electric vehicle and the second electric vehicle, respectively, and have the same maximum output current;
A first connector and a second connector to which the first electric vehicle and the second electric vehicle can be connected for charging, respectively;
A first detection signal that detects the connection of the first electric vehicle, which is electrically connected to the first connector and the second connector and consists of the first charging request power of the first electric vehicle, and a first detection signal of the second electric vehicle. 2 EV sensing units capable of generating and transmitting second detection signals that detect the connection of the second electric vehicle consisting of charging request power;
a first current distribution unit electrically connected to the first power pack, the first connector, and the second connector, and capable of distributing and supplying the first charging current to the first connector and the second connector;
A second current distribution unit electrically connected to the first power pack, the first connector, and the second connector, and capable of distributing and supplying the second charging current to the first connector and the second connector; And
It is electrically connected to the first power pack, the second power pack, the EV sensing unit, the first current distribution unit, and the second current distribution unit, and receives the first detection signal and the second detection signal from the EV sensing unit. When one or more of the detection signals are received, a charging control unit that controls charging of the electric vehicle corresponding to the detection signal through the first current distributor and the second current distributor,
The first detection signal and the second detection signal may include a first charging request power of the first electric vehicle and a second charging request power of the second electric vehicle, respectively,
The first charging current consists of a first main charging current supplied to the first connector and a first sub-charging current supplied to the second connector,
The second charging current consists of a second main charging current supplied to the second connector and a second sub-charging current supplied to the first connector,
The charging control unit,
When the first detection signal is received, the first current distributor is controlled so that the first charging current is supplied to the first electric vehicle, and when the first charging request power is greater than the first set value, the first charging current is supplied to the first electric vehicle. The second sub-charge current is also controlled to be supplied, and when the battery charge state information transmitted from the first electric vehicle is less than a second set value, the second sub-charge current is supplied to the first electric vehicle through the second current distributor. controlling to supply;
When the second detection signal is received while the first charging current is being supplied to the first electric vehicle, the first charging request power and the second charging request power are compared to determine the first charging current and the second charging current. The distribution ratio of the charging current is adjusted, and when the second charging request power is less than the first charging request power, the second current distribution unit is controlled to supply the second sub-charging current, and the first charging request power is If it is less than the second charging request power, controlling the first current distributor so that the first sub-charge current is supplied; And
The first remaining charging power of the first electric vehicle and the second remaining charging power of the second electric vehicle are periodically calculated, and if the first remaining charging power and the second remaining charging power are the same, the first sub-charging is performed. A dual-type electric vehicle charging control device that performs a step of stopping supply of current and the second sub-charging current. delete delete delete delete delete