KR102820701B1 - Charging system for electric vehicle - Google Patents

Abstract

The present invention relates to a charging system for an electric vehicle, the charging system for the electric vehicle including: a main charger that receives power from a substation and charges the electric vehicle; and one or more channel chargers that communicate with the main charger and receive power from the main charger and selectively charge the electric vehicle, wherein the main charger includes a control unit that controls the amount of power allocated to the main charger and the channel charger.

Description

{CHARGING SYSTEM FOR ELECTRIC VEHICLE}

The present invention relates to a charging system for an electric vehicle, and more specifically, to a charging system that automatically controls whether a charger is charging and can vary the number of chargers.

Due to the rapid increase in electric vehicles due to policies to promote the spread of electric vehicles and various tax incentives, and the mandatory installation of electric vehicle chargers in parking lots, the load on power supply facilities has increased significantly, and unstable phenomena such as additional power generation facilities due to large-scale substation facilities have occurred, resulting in increased energy loss and greenhouse gas emissions.

In addition, since rapid chargers for electric vehicles consume a lot of power, the capacity of substation facilities also increases, and the installation of substation facilities to protect them also needs to be expanded, which is a problem. In existing buildings, it is impossible to increase or expand substation facilities. In particular, if the capacity of transformers in substation facilities increases, no-load loss and load loss increase, which ultimately leads to a phenomenon in which the efficiency of the transformer decreases.

Existing electric vehicle rapid chargers have large capacities and are also large in size, which takes up a lot of space and hinders securing parking spaces. In addition, rapid charging requires the charging station to be vacated immediately due to rapid charging, but this is not the case in everyday life, which causes friction with those waiting to use rapid charging, and for operators, the turnover rate decreases, which reduces the profitability of expensive chargers, and charging fees are continuously raised, creating a vicious cycle between users and operators.

When there are many users or end users who want to use electric vehicle chargers or when continuous additional installations are required, the most difficult issue to consider when reviewing the installation is the capacity of the water supply facility. If the capacity is insufficient or it is difficult to increase, accidents may occur due to unsafe operation of the water supply facility, which can cause serious safety problems.

When installing chargers for electric vehicles, there is a problem that it is difficult to comply with mandatory installation when the capacity of the substation equipment is insufficient, and there are frequent cases of inconvenience to users and conflicts between residents or users due to the small number of chargers.

delete

KR 10-2032554 B1

The present invention aims to solve the above-mentioned problems and other problems. Another object is to provide a charging system for an electric vehicle that automatically controls a plurality of chargers and can vary the number of chargers.

According to one aspect of the present invention to achieve the above or other purposes, a charging system for an electric vehicle may be provided, including a main charger that receives power from a substation and charges an electric vehicle; and one or more channel chargers that communicate with the main charger and receive power from the main charger and selectively charge the electric vehicle, wherein the main charger includes a control unit that controls the amount of power allocated to the main charger and the channel charger.

According to one aspect of the present invention, the main charger may include a control unit that controls a charging method of the main charger and the channel charger; a payment management unit that stores and manages payment information for a charging cost according to charging in the main charger and the channel charger; a load detection unit that detects a load in the main charger and each channel charger; a communication unit that communicates with each channel charger; and a notification unit that transmits a notification message to a terminal of a user of an electric vehicle when charging is completed in the main charger and the channel charger.

According to one aspect of the present invention, the control of the amount of power allocated to the main charger and the channel charger may be a channel control method that selectively supplies power to the main charger and the channel charger by prioritizing the power supplied to the main charger and the channel charger within a preset power range.

According to one aspect of the present invention, the control of the amount of power allocated to the main charger and the channel charger may be a load control method that controls the load capacity allocated to each charger by supplying the power to the main charger and the channel charger.

According to one aspect of the present invention, the main charger may be a rapid charger.

According to one aspect of the present invention, the channel charger may be capable of rapid charging or slow charging.

According to one aspect of the present invention, payment information for charging costs incurred during charging in the main charger and channel charger can be stored and managed in the payment management unit of the main charger.

According to one aspect of the present invention, the electric vehicle may be a two-wheeled vehicle, a three-wheeled vehicle or a four-wheeled vehicle.

According to one aspect of the present invention, when the total usage of the main charger and the channel charger reaches the maximum capacity, charging is controlled according to a channel control method that controls charging in the order in which charging started, and when the load is light, rapid charging can be performed even in the channel charger.

According to one aspect of the present invention, the channel charger may be connected in series with two or more of them and form an extended channel controlled by the control unit.

According to one aspect of the present invention, the channel charger may include an inverter and a converter.

The charging system for an electric vehicle according to the present invention is described as follows.

According to at least one of the embodiments of the present invention, a channel charger is provided so as to operate multiple expandable chargers, thereby providing an advantage in that multiple electric vehicles can be charged at the same time while installing chargers for electric vehicles without increasing the power supply facilities.

According to at least one of the embodiments of the present invention, there is an advantage in that the system can be controlled so that overload operation of power facilities and a large amount of energy loss do not occur. That is, in order to prevent accidents due to an increase in the load of power facilities and overload operation of transformers, etc. due to the increase and introduction of chargers for electric vehicles, there is an advantage in that voltage and current can be stably controlled while expanding a large number of expandable chargers for electric vehicles through real-time artificial intelligence detection.

In addition, according to at least one of the embodiments of the present invention, it is possible to add charger channels for a large number of electric vehicles with one rapid charger or a large-capacity charger, and there is an advantage in that rapid charging can be performed sequentially through priority charging for safe driving and load control.

According to at least one of the embodiments of the present invention, there is an advantage in that a large number of electric vehicles can be charged by a single main charger with multiple channel chargers through a balanced charging method (load control method). In other words, there is an advantage in that channels can be freely added and installed so that multiple electric vehicles can be flexibly charged.

Further scope of applicability of the present invention will become apparent from the detailed description below. However, since various changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present invention, are given by way of example only.

Figure 1 is a schematic diagram of a charging system for an electric vehicle for designing a low-capacity water supply facility related to the present invention.
Figure 2 is an internal configuration diagram of a main charger according to an embodiment of the present invention.

Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing symbols, the same or similar components will be given the same reference numerals and redundant descriptions thereof will be omitted. The suffix "part" used for components in the following description is assigned or used interchangeably only for the convenience of writing the specification, and does not in itself have a distinct meaning or role. In addition, when describing the embodiments disclosed in this specification, if it is determined that a specific description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The terms are used only to distinguish one component from another.

Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, it should be understood that terms such as “comprises” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but do not exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

Fig. 1 is a schematic diagram of an electric vehicle charging system (100) for designing a low-capacity water supply facility related to the present invention. Hereinafter, an electric vehicle charging system (100) according to one embodiment of the present invention will be described with reference to Fig. 1. An electric vehicle according to one embodiment of the present invention includes a two-wheeled vehicle, a three-wheeled vehicle, and a four-wheeled vehicle driven by electricity. That is, it is not limited to an electric vehicle.

FIG. 1 is a drawing illustrating an expanded charging system for a charger of an electric vehicle through a main charger (110) via a substation (101) according to one embodiment of the present invention.

A charging system (100) for an electric vehicle according to one embodiment of the present invention includes a main charger (110) that receives power from a substation (101) to charge an electric vehicle, and one or more channel chargers (120) that communicate with the main charger (110) and receive power from the main charger (110) to selectively charge the electric vehicle. In addition, the main charger (110) includes a control unit (111) that controls the amount of power allocated to the main charger (110) and the channel chargers (120). That is, while some of the main charger (110) and the one or more channel chargers (120) receive power for charging by the control unit (111), the others may not receive power. However, if necessary, both the main charger (110) and the one or more channel chargers (120) may be charged.

In one embodiment of the present invention, the amount of power allocated to the main charger (110) and the channel charger (120) can be controlled by a channel control method that selectively supplies power to the main charger (110) and the channel charger (120) by prioritizing the power supplied to the main charger (110) and the channel charger (120) within a preset power range. The channel control method refers to a method that selectively supplies power to the main charger (110) and a plurality of channel chargers (120), and for example, refers to a method that controls charging in the order in which charging started. If the electric vehicle is charged by the channel control method, if power is set to be supplied only to five channel chargers (120), only the five electric vehicles that started charging first are charged, and charging is not possible with the remaining channel chargers (120).

That is, when freely installing and increasing multiple chargers for electric vehicles according to the capacity of the limited substation facility (101), the voltage and current status of the substation facility (101) is detected in real time and controlled at the same time, thereby allowing many electric vehicles to be connected to the charger. At this time, the method of controlling charging is to sequentially charge the vehicles being charged first, thereby controlling the charging within the capacity of the substation facility, thereby minimizing suppression of building expansion, power cable increase, or energy loss. The voltage and current status of the substation facility (101) can be detected by the load detection unit (115) of the main charger (110).

In addition, the control of the amount of power allocated to the main charger (110) and the channel charger (120) in one embodiment of the present invention may be controlled by a load control method that controls the load capacity allocated to each charger for the power supplied to the main charger (110) and the channel charger (120). For example, it may be controlled in a manner that some of the power supplied from the substation (101) is supplied to the main charger (110), and the remaining power is evenly supplied to the channel chargers (120). The load at this time means power. For example, when the main charger (110) receives 100 power from the substation (101), 50 may be used by the main charger (110), and the remaining 50 may be evenly provided to a plurality of channel chargers (120). However, it is not limited to the fact that power is always supplied evenly to the multiple channel chargers (120), and the remaining power used by the main charger (110) may be supplied unevenly to the multiple channel chargers (120).

At this time, the channel control method and the load control method do not always have to be used separately, and may be used interchangeably as needed. That is, when the total usage of the main charger (110) and the channel charger (120) reaches the maximum capacity, the charging is controlled according to the channel control method that controls the charging in the order in which the charging started, and during light load, rapid charging can be controlled to be operated sequentially even in the channel charger (120). The light load refers to the case where the main charger (110) and the channel charger (120) are not using at least a portion of the available power. That is, the channel control method or the load control method can be used to control by considering the total amount of power being used by the main charger (110) and the channel charger (120). For example, when the number of electric vehicles to be charged is not large, only a small number of channel chargers (120) are used according to the channel control method, and when the number of electric vehicles to be charged increases and the use of all chargers is required, the power can be supplied to all chargers (110, 120) by the load control method to enable charging. In this way, if the number of electric vehicles to be charged increases and the number of main chargers (110) or channel chargers (120) to be used increases and is controlled by a load control method, the charging time of an electric vehicle that is already being charged may increase from the initially expected time. Accordingly, the number of channel chargers (120) can be increased or decreased without increasing or decreasing the power supplied from the substation equipment (101).

The above main charger (110) may be a rapid charger, and the channel charger (120) may support rapid charging and slow charging. In addition, since the channel charger (120) also supports rapid or slow charging, it is possible to reduce conflicts with unspecified people over charging space by parking in an empty channel parking space without going to a separate rapid charger in the parking lot.

At this time, the charging cost incurred when charging at the main charger (110) and channel charger (120) can be paid at the main charger (110). This means that when payment is made through a payment method at multiple channel chargers (120), the processing for this is done at the main charger (110). To this end, the main charger (110) is equipped with a payment management unit (113) that can receive and store payment information made at each channel charger (120).

FIG. 2 is a diagram showing the internal configuration of a main charger according to an embodiment of the present invention. Referring to FIG. 2, the main charger (110) includes a control unit (111) that controls the charging capacity or charging method of a plurality of channel chargers (120), a payment management unit (113) that stores and manages payment information for charging costs in the main charger (110) and the plurality of channel chargers (120), a load detection unit (115) that detects a load in the main charger (110) and each channel charger (120), a communication unit (117) that communicates with each channel charger (120), and a notification unit (119) that notifies a user's terminal of a notification message when charging in the main charger (110) and the channel charger (120) is completed. In addition, the plurality of channel chargers (120) are also equipped with a communication unit so as to be able to communicate with the main charger (110), and a payment unit so as to enable payment by a payment method such as a user's credit card or cash.

Meanwhile, in one embodiment of the present invention, the channel chargers (120) are connected in series with each other in two or more numbers and form an extended channel controlled by the control unit (111). They are also connected in series with the main charger (110). That is, the extended channel includes a plurality of channel chargers (120) that are connected in series, such as a first channel charger (121), a second channel charger (122), and a third channel charger (123). That is, it includes a plurality of chargers (121, 122, 123) that selectively receive power from the main charger (110). At this time, the number of the channel chargers (120) can be increased or decreased without increasing or decreasing the power supplied from the substation equipment (101).

As described above, in one embodiment of the present invention, an artificial intelligence electric vehicle expandable charger and charging system for designing low-capacity water supply facilities can install multiple chargers for electric vehicles without increasing the capacity of limited water supply facilities.

In the case where an expandable channel charger is to be installed in addition to a main charger (110), power and communication lines can be connected to the channel charger (120), and the number of charging terminals can be increased by the number of channel chargers (120). In the case where multiple vehicles are charged at the same time, the charging load is evenly controlled so that the capacity of the power supply facility is not exceeded, thereby supporting safe and high-efficiency driving without additional installation of power facilities.

In addition, the battery of an electric vehicle is a chemical energy storage device in which lithium ions are charged and discharged through the positive and negative electrodes, and is charged through an electric vehicle charger. High-voltage AC power is input from KEPCO, and it is reduced to low voltage through a transformer in a substation (101), and then the AC is converted into DC through an inverter in the charger, and the rated DC voltage and current are supplied to the battery through a converter to charge and discharge. At this time, as the capacity and quantity increase, a large amount of harmonics are generated, which causes noise and malfunctions in the transformer and surrounding electric and electronic devices. The additional channel charger (120) according to one embodiment of the present invention includes a part connected to the main charger (110), an inverter, and a converter.

In addition, each of the above channel chargers (120) supports fast charging when the quantity is small, and can also support mobile guidance along with an alarm when charging is completed according to a preset time.

In addition, the electric vehicle expansion channel charger (120) according to the present invention must be installed in a location that is easy to inspect, and the main charger (110) and each channel charger (120) must be equipped with CCTV and fire detection to enable movement monitoring and video recording for maintenance and security monitoring.

The above detailed description should not be construed as restrictive in all respects but should be considered as illustrative. The scope of the invention should be determined by a reasonable interpretation of the appended claims, and all changes coming within the equivalent scope of the invention are intended to be embraced within the scope of the invention.

100: Charging system of electric vehicle, 101: Substation equipment, 110: Main charger, 111: Control unit, 113: Payment management unit, 115: Load detection unit, 117: Communication unit, 119: Notification unit, 120: Channel charger, 121: 1st channel charger, 122: 2nd channel charger, 123: 3rd channel charger, 150: Electric vehicle

Claims (10)

Supplied from substation equipment A main charger that supplies part of the electricity to charge an electric vehicle; and
It includes one or more channel chargers that communicate with the main charger and selectively charge electric vehicles by receiving the remaining power from the power supplied from the substation from the main charger.
The above main charger comprises a control unit that controls the amount of power allocated to the main charger and the channel charger; and
Includes a payment management unit that stores and manages payment information for charging costs according to charging at the main charger and channel charger;
The above main charger is a rapid charger,
The above channel charger can be used for fast charging or slow charging.
Payment information for charging costs incurred when charging at the main charger and channel charger is stored and managed in the payment management section of the main charger,
Charging system for electric vehicles.
In claim 1,
The above main charger is,
A control unit that controls the charging method of the main charger and channel charger;

A load detection unit that detects the load in the main charger and each channel charger;
A communication unit communicating with each of the above channel chargers; and
Including a notification unit that transmits a notification message to the user's terminal of the electric vehicle when charging is completed at the main charger and channel charger.
Charging system for electric vehicles.
In claim 1,
Control of the amount of power allocated to the above main charger and channel charger,
It is characterized by a channel control method that selectively supplies power to the main charger and channel charger by prioritizing the power supplied to the main charger and channel charger within a preset power range.
Charging system for electric vehicles.
In claim 1,
Control of the amount of power allocated to the above main charger and channel charger,
It is characterized by a load control method that controls the load capacity allocated to each charger by supplying power to the main charger and channel charger.
Charging system for electric vehicles.
delete delete In claim 1,
The above channel charger is characterized by including an inverter and a converter.
Charging system for electric vehicles.
In claim 1,
When the total usage of the main charger and the channel charger reaches the maximum capacity, the charging is controlled according to the channel control method that controls charging in the order in which charging started, and is characterized in that the channel charger is also controlled so that rapid charging is possible during light load.
Charging system for electric vehicles.
In claim 1,
The above channel charger is,
Characterized in that it comprises two or more extended channels connected in series with each other and controlled by the control unit.
Charging system for electric vehicles.
In claim 9,
Characterized in that the number of channel chargers can be increased or decreased without increasing or decreasing the power supplied from the substation equipment.
Charging system for electric vehicles.