KR-20260065128-A - ELECTRIC VEHICLE CHARGING DEVICE WITH BYPASS SWITCH

Abstract

The present invention relates to an electric vehicle charging device, and more specifically, to an electric vehicle charging device equipped with a bypass switch, comprising a bypass switching unit that connects the output of a power supply unit to a household load. The bypass switching unit of the electric vehicle charging device of the present invention for solving the above technical problem may include a power relay that connects AC current and a signal relay that drives the power relay.

Inventors

• 장동열
• 이주운

Assignees

• 엘지이노텍 주식회사

Dates

Publication Date

20260508

Application Date

20241101

Claims (7)

1. As an electric vehicle charging device connected to a power supply unit and a household load, A bypass switching unit that connects or disconnects the output of the above power supply unit to the above household load; A grid switching unit that connects or disconnects the output of the above power supply unit; A load switching unit that connects or disconnects the output of the grid switching unit above to a household load; and An electric vehicle charging device comprising a control unit that controls the above switching units.
2. In Article 1, The above control unit is an electric vehicle charging device that turns off the bypass switching unit, turns on the grid switching unit, and turns on the load switching unit when the output of the above power supply unit is normal and connected to an electric vehicle.
3. In Article 1, The above control unit is an electric vehicle charging device that turns ON a bypass switching unit, turns OFF a grid switching unit, and turns OFF a load switching unit when the output of the above power supply unit is normal and is not connected to an electric vehicle.
4. In Article 1, The above control unit is an electric vehicle charging device that turns off the bypass switching unit and the grid switching unit when the output of the power supply unit is abnormal.
5. In Paragraph 4, The above control unit is an electric vehicle charging device that turns on a load switching unit when the charge amount of the battery of the connected electric vehicle is greater than or equal to a predetermined value.
6. In Article 1, The above-described bypass switching unit comprises a power relay that connects AC current and a signal relay that drives the power relay, in an electric vehicle charging device.
7. In Article 6, An electric vehicle charging device characterized in that the power relay is cut off when there is no driving signal, and the signal relay is connected when there is no driving signal.

Description

Electric vehicle charging device equipped with a bypass switch The present invention relates to an electric vehicle charging device, and more specifically, to an electric vehicle charging device equipped with a bypass switch, comprising a bypass switching unit that connects the output of a power supply unit to a household load. 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 extensive research and development is underway. The electric vehicle charging device receives power from the power supply unit and supplies power for battery charging to the electric vehicle, and can also supply power to household loads. In addition, the electric vehicle charging device can also supply current to household loads using the large-capacity battery of the electric vehicle. However, currently used electric vehicle charging devices cannot supply current to household loads if a malfunction occurs in the charging device. Figure 1 is a drawing showing a conventional electric vehicle charging device. Referring to FIG. 1, the charging device (100) is an electric vehicle charging device connected to a power supply unit (300) and a household load (500), and is connected to the power supply unit (300) through an AC input terminal (110) and to the household load (500) through a load connection terminal (113). The grid switching unit (183) can connect or disconnect the AC input terminal (110) to the AC-DC converter (130) and the load switching unit (185), and the load switching unit (185) can connect or disconnect the output of the grid switching unit (183) or the AC-DC converter (130) to the load connection terminal (113). However, if a defect occurs in the charging device (100) and there is an abnormality in the switching unit (183, 185) of the charging device (100), there is a problem in that power cannot be supplied to the household load (500) even if the power supply unit (300) is normal. Technology development for charging devices capable of solving such problems is necessary. Figure 1 is a drawing showing a conventional electric vehicle charging device. FIG. 2 is a drawing showing an electric vehicle charging device according to one embodiment of the present invention. Figure 3 is a diagram showing a bypass switching section according to Figure 2. FIG. 4 is a diagram showing a flowchart of a control unit of an electric vehicle charging device according to one embodiment of the present invention. FIG. 5 is a diagram showing the control of a switching unit of an electric vehicle charging device according to an 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 described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly" or "electrically connected" with other members or elements in between. Additionally, throughout the specification, the description that each layer (film), region, pattern, or structure is formed "on" or "under" the substrate, each layer (film), region, pad, or pattern includes both direct formation and formation through another layer. The criteria for "on" or "under" each layer are described based on the drawings. Furthermore, expressions such as 'first, second,' etc., are used solely to distinguish multiple compositions and do not limit the order or other characteristics between the