KR-20260062764-A - Electric vehicle charging Equipment wireless communication and system with it

KR20260062764AKR 20260062764 AKR20260062764 AKR 20260062764AKR-20260062764-A

Abstract

The present invention relates to an electric vehicle charging device equipped with wireless communication for charging an electric vehicle and an electric vehicle battery, and a system including the same. The control units of the present invention for solving the above technical problem can check whether the electric vehicle and the electric vehicle charging device are connected to each other by a cable, start operation using wireless communication, and block the connection of the output switching unit if they are not connected.

Inventors

장주영

Assignees

엘지이노텍 주식회사

Dates

Publication Date: 20260507
Application Date: 20241210
Priority Date: 20241029

Claims (14)

In an electric vehicle charging system that charges electric vehicles and electric vehicle batteries, An electric vehicle charging device comprising an output switching unit for connecting or cutting off a current for charging the electric vehicle, a wireless communication unit for communicating with the electric vehicle, and a charging device control unit for controlling the output switching unit and the wireless communication unit; and An electric vehicle comprising: a connection unit for connecting or disconnecting the output switching unit and the battery; an electric vehicle wireless communication unit for communicating with the electric vehicle charging device; and an electric vehicle control unit for controlling the connection unit and the electric vehicle wireless communication unit. An electric vehicle charging system characterized by the above-mentioned control units confirming that the electric vehicle and the electric vehicle charging device are connected to each other by a cable and starting operation using wireless communication.
In Article 1, The above-described charging device control unit checks the voltage of the PD (Proximity Detection) to determine whether the electric vehicle and the cable are connected, in an electric vehicle charging system.
In Article 2, The above charging device control unit determines that the electric vehicle is connected to the electric vehicle via a cable if the voltage of the PD (Proximity Detection) is greater than the reference voltage, in an electric vehicle charging system.
In Article 2, The above charging device control unit enables wireless communication operation when connected to the electric vehicle via a cable, an electric vehicle charging system.
In Article 2, The above charging device control unit blocks the connection of the output switching unit when the above electric vehicle is not connected by a cable, in an electric vehicle charging system.
In Article 1, The above electric vehicle control unit is an electric vehicle charging system that checks the voltage of PD (Proximity Detection) to determine whether the electric vehicle charging device and the cable are connected.
In Article 6, The above electric vehicle control unit determines that the electric vehicle is connected to the electric vehicle charging device via a cable if the voltage of the PD (Proximity Detection) is lower than the reference voltage.
In Article 6, The above electric vehicle control unit enables wireless communication operation when connected to the electric vehicle charging device by a cable, an electric vehicle charging system.
In Article 6, The electric vehicle control unit above blocks the connection of the connection unit when the electric vehicle is not connected by a cable, in an electric vehicle charging system.
In an electric vehicle charging device that charges an electric vehicle battery, An electric vehicle charging device comprising an output switching unit for connecting or disconnecting a current for charging the electric vehicle, a wireless communication unit for communicating with the electric vehicle, and a charging device control unit for controlling the output switching unit and the wireless communication unit, wherein the charging device control unit confirms that the electric vehicle and the charging device are connected to each other by a cable and starts operation using wireless communication.
In Article 10, The above charging device control unit checks the voltage of the PD (Proximity Detection) to determine whether the electric vehicle and the cable are connected, and is an electric vehicle charging device.
In Article 11, The above charging device control unit determines that the electric vehicle is connected to the electric vehicle via a cable if the voltage of the PD (Proximity Detection) is greater than the reference voltage.
In Article 11, The above charging device control unit enables wireless communication operation when connected to the electric vehicle via a cable, an electric vehicle charging device.
In Article 11, The above charging device control unit blocks the connection of the output switching unit when the above electric vehicle is not connected to the above electric vehicle via cable, an electric vehicle charging device.

Description

Electric vehicle charging device equipped with wireless communication and system including the same The present invention relates to a system including an electric vehicle and an electric vehicle charging device for charging the battery of an electric vehicle, equipped with wireless communication. As carbon dioxide emissions increase due to the use of petroleum-based fuels in automobiles, and as the resulting global warming continues and abnormal climate phenomena occur, automobile manufacturing technologies to reduce carbon dioxide emissions are advancing, and extensive research is being conducted on technologies related to eco-friendly vehicles. As such eco-friendly vehicles, electric vehicles (EVs) powered by batteries and electric motors have been commercialized, and much research is being concentrated on them. These electric vehicles must supply electricity to their internal batteries, and typically, the batteries are charged by an electric vehicle charging device. The electric vehicle and the electric vehicle charging device that charges the electric vehicle's battery must verify charging-related data through mutual data exchange before the necessary operations for charging can begin. A system is being established between a charging device and an electric vehicle to perform bidirectional communication between the charger and the electric vehicle through a Control Pilot (CP) signal line connecting the charging device to the electric vehicle. In other words, to perform bidirectional communication between the electric vehicle charging device and the electric vehicle, bidirectional communication can be carried out using the Power Line Communication (PLC) method as a high-level communication protocol. Signal messages modulated by the PLC are transmitted through the Control Pilot (CP) signal line. However, the electric vehicle may support two-way communication while the charging device does not, and conversely, the charging device may support two-way communication while the electric vehicle does not, or neither the electric vehicle nor the charger may support two-way communication. To support bidirectional communication in these existing systems, a separate wireless communication module can be added to the electric vehicle and the electric vehicle charger to enable relatively easy bidirectional wireless communication. However, when charging is controlled via wireless communication between the electric vehicle charging device and the electric vehicle, it may be difficult to accurately verify the connection status of the charging cable and the communication status. If a problem occurs in communication between the wireless communication module of an electric vehicle and the wireless communication module of a charger, the electric vehicle charging device and the electric vehicle may improperly connect power lines, potentially causing serious safety issues and reduced charging efficiency in the electric vehicle charging system. The development of technology capable of providing an improved electric vehicle charging system to address these issues is required. FIG. 1 is a drawing showing an AC electric vehicle charging device and an electric vehicle according to one embodiment of the present invention. FIG. 2 is a drawing showing a DC electric vehicle charging device and an electric vehicle according to another embodiment of the present invention. FIG. 3 is a drawing showing a cable connection part according to the present invention. FIG. 4 is a diagram showing a flowchart of a charging device control unit according to an embodiment of the present invention. FIG. 5 is a diagram showing a flowchart of an electric vehicle control unit according to one embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Throughout the specification, the same reference numerals refer to the same components. "And/or" includes each of the mentioned items and all combinations of one or more. The terms used herein are for describing embodiments and are not intended to limit the invention. In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. As used herein, "comprising" and/or "comprising" does not exclude the presence or addition of one or more other components, steps, actions, and/or elements to the mentioned components, steps, actions, and/or elements. Furthermore, throughout the specification, when a part is des