Wireless charging control device for electric vehicle and method for controlling wireless charging thereof

Abstract

A wireless charging control method of a wireless charging control device for a driving electric vehicle according to an embodiment of the present invention includes the steps in which: a first control unit detects entry of the electric vehicle into a first area; the first control unit obtains vehicle information of the electric vehicle; the first control unit transfers the vehicle information of the electric vehicle to a second control unit; the first control unit controls feeding of a plurality of ground assemblies arranged in the first area; and the second control unit controls feeding of a plurality of ground assemblies arranged in a second area, wherein: each of the step in which the first control unit controls feeding and the step in which the second control unit controls feeding comprises a first input voltage interval, a second input voltage interval, and a third input voltage interval which are sequentially performed; in the first input voltage interval, an input voltage is increased over time, and in the third input voltage interval, the input voltage is reduced over time; and the first input voltage interval, the second input voltage interval, and the third input voltage interval of the second control unit follow the first input voltage interval, the second input voltage interval, and the third input voltage interval of the first control unit.

Description

Wireless charging control device for electric vehicles and its wireless charging control method

[0001] The present invention relates to a wireless charging control device for an electric vehicle and a wireless charging control method thereof.

[0002] A wireless charging system for electric vehicles includes a ground assembly (GA) and a vehicle assembly (VA). In the case of static wireless power transfer, the ground assembly may be placed on the parking lot floor. In the case of dynamic wireless power transfer, the ground assembly may be placed on the road. The vehicle assembly is mounted on the electric vehicle.

[0003] Power can be wirelessly transferred from the ground assembly to the vehicle assembly through magnetic induction or magnetic resonance between the primary coil of the ground assembly and the secondary coil of the vehicle assembly. In a dynamic wireless power transfer method, a method for controlling power supply to multiple ground assemblies sequentially arranged on a road is required to increase the efficiency of wireless power transfer.

[0004] The technical problem to be solved by the present invention is to provide a wireless charging control device for a running electric vehicle and a wireless charging control method thereof.

[0005] Another technical problem to be achieved by the present invention is to provide a method for precisely controlling a wireless charging control device for a running electric vehicle.

[0006] Another technical challenge of the present invention is to provide a method for increasing the charging efficiency of a wireless charging control device for a running electric vehicle.

[0007] Another technical problem to be achieved by the present invention is to provide a method for detecting foreign substances in a wireless charging system for an electric vehicle.

[0008] Another technical problem to be achieved by the present invention is to provide a method for controlling wireless charging when a wireless charging system for an electric vehicle detects a foreign substance.

[0009] A wireless charging control method of a wireless charging control device for a running electric vehicle according to one embodiment of the present invention comprises: a step in which a first control unit detects entry of the electric vehicle into a first area; a step in which the first control unit obtains vehicle information of the electric vehicle; a step in which the first control unit transmits the vehicle information of the electric vehicle to a second control unit; a step in which the first control unit controls power supply of a plurality of ground assemblies arranged in the first area; and a step in which the second control unit controls power supply of a plurality of ground assemblies arranged in the second area, wherein the step in which the first control unit controls power supply and the step in which the second control unit controls power supply each include a first input voltage section, a second input voltage section, and a third input voltage section that are sequentially performed, wherein in the first input voltage section, the input voltage increases over time, and in the third input voltage section, the input voltage decreases over time, and the first input voltage section, the second input voltage section, and the third input voltage section of the second control unit follow the first input voltage section, the second input voltage section, and the third input voltage section of the first control unit.

[0010] A part of the second input voltage section of the first control unit may overlap with a part of the first input voltage section of the second control unit.

[0011] At least one of the starting point of the first input voltage section of the second control unit, the starting point of the second input voltage section of the second control unit, the maintenance period of the second input voltage section of the second control unit, and the starting point of the third input voltage section of the second control unit may be set based on the vehicle information.

[0012] The start point of the first input voltage section of the second control unit may overlap with the first input voltage section of the first control unit or the second input voltage section of the first control unit.

[0013] The start point of the second input voltage section of the second control unit may overlap with the second input voltage section of the first control unit.

[0014] The first input voltage in the second input voltage section of the first control unit may be greater than the second input voltage in the first input voltage section of the second control unit.

[0015] The above vehicle information may include speed information of the electric vehicle.

[0016] The first region and the second region include an overlapping section that overlaps with each other, and in the transmitting step, the first control unit can transmit vehicle information of the electric vehicle to the second control unit before the electric vehicle enters the overlapping section.

[0017] At least one ground assembly is disposed within the above overlapping section, and the at least one ground assembly can be controlled by the first control unit or the second control unit.

[0018] When the switch connected between the at least one ground assembly, the first control unit, and the second control unit is in a first state, the at least one ground assembly can be controlled by the first control unit, and when the switch is in a second state, the at least one ground assembly can be controlled by the second control unit.

[0019] The at least one ground assembly may be controlled by a control unit in a high input voltage state among the first control unit and the second control unit.

[0020] The step of controlling the power supply by the second control unit can be triggered by vehicle information of the electric vehicle received from the first control unit.

[0021] According to one embodiment of the present invention, a wireless charging control device for a running electric vehicle includes a communication unit that obtains vehicle information from an electric vehicle that has entered a plurality of ground assemblies arranged sequentially, and a control unit that controls power supply to the plurality of ground assemblies based on the vehicle information, wherein the control unit controls power supply to the plurality of ground assemblies so that a first input voltage section, a second input voltage section, and a third input voltage section are sequentially performed, wherein an input voltage increases over time in the first input voltage section, and an input voltage decreases over time in the third input voltage section, and the first input voltage section, the second input voltage section, and the third input voltage section for some of the plurality of ground assemblies follow the first input voltage section, the second input voltage section, and the third input voltage section for other some of the plurality of ground assemblies.

[0022] The control unit includes a first control unit that controls power supply to ground assemblies arranged in a first region among the plurality of ground assemblies, and a second control unit that controls power supply to ground assemblies arranged in a second region among the plurality of ground assemblies, and the first input voltage section, the second input voltage section, and the third input voltage section controlled by the second control unit may follow the first input voltage section, the second input voltage section, and the third input voltage section controlled by the first control unit.

[0023] Control of the above second control unit can be triggered by the above first control unit.

[0024] A wireless charging control device for an electric vehicle driving on a driving charging road according to another embodiment of the present invention includes a communication unit that receives status information from at least one of a plurality of ground assemblies arranged on the driving charging road, the electric vehicle, a vehicle assembly mounted on the electric vehicle, and an external management device; a control unit that detects an emergency state using the status information and stops supplying power to at least some of the plurality of ground assemblies; and a display unit that is installed along the driving charging road and is controlled by the control unit to display an emergency state.

[0025] The vehicle further includes an emergency signal input unit installed along the driving charging road, and when an emergency signal is input through the emergency signal input unit, the control unit stops supplying power to at least some of the plurality of ground assemblies, and the display unit can display an emergency state.

[0026] The above display unit and the above emergency signal input unit can be mounted on a structure installed along the driving charging road.

[0027] The plurality of ground assemblies may include a first ground assembly set and a second ground assembly set sequentially arranged along a driving direction of the electric vehicle on the driving charging road, the display unit may include a first display unit for displaying an emergency state of the first ground assembly set and a second display unit for displaying an emergency state of the second ground assembly set, and the emergency signal input unit may include a first emergency signal input unit for inputting an emergency signal for the first ground assembly set and a second emergency signal input unit for inputting an emergency signal for the second ground assembly set.

[0028] The above display unit and the emergency signal input unit may be arranged to overlap in a spaced area between the first ground assembly set and the second ground assembly set in a direction perpendicular to the driving direction.

[0029] The first display unit may include a first start indicator light disposed at a starting point of the first ground assembly set and a first end indicator light disposed at an ending point of the first ground assembly set, and the second display unit may include a second start indicator light disposed at a starting point of the second ground assembly set and a second end indicator light disposed at an ending point of the second ground assembly set.

[0030] In the emergency state of the first ground assembly set, both the first start indicator light and the first end indicator light may be turned on, and in the emergency state of the second ground assembly set, both the second start indicator light and the second end indicator light may be turned on.

[0031] The second emergency signal input unit may be positioned between the first end indicator light and the second start indicator light.

[0032] The above emergency condition may include at least one of a failure of at least some of the plurality of ground assemblies, detection of a foreign object, a bad road surface, an accident, and a fire.

[0033] The above communication unit can transmit the emergency state to the electric vehicle or a vehicle assembly mounted on the electric vehicle.

[0034] The above emergency state includes a first emergency state that suspends the power supply for a first period and a second emergency state that suspends the power supply for a second period longer than the first period, and the control unit can detect the first emergency state or the second emergency state from the state information and control the emergency state display period of the display unit according to the detection result.

[0035] The above emergency state includes a first emergency state that stops the power supply for a first section and a second emergency state that stops the power supply for a second section longer than the first section, and the control unit can detect the first emergency state or the second emergency state from the state information and control the emergency state display section of the display unit according to the detection result.

[0036] In another embodiment of the present invention, a wireless charging control method of a wireless charging system for an electric vehicle comprises: a step of receiving status information from a charging assembly including a ground assembly and a vehicle assembly by a wireless charging control device; a step of detecting an abnormal state of the ground assembly by using the status information by the wireless charging control device; and a step of changing power output from the ground assembly when the abnormal state is detected from the charging assembly by the wireless charging control device, wherein the status information includes at least one of a temperature, a temperature change per hour, an impedance, a current, a voltage, a power, a magnetic flux density, and a coupling coefficient between the ground assembly and the vehicle assembly obtained through the charging assembly.

[0037] The above current may be a current of a coil of the ground assembly or the vehicle assembly, and the above voltage may be a voltage of a coil of the ground assembly or the vehicle assembly.

[0038] The above state information may include state information before the ground assembly is connected to the vehicle assembly after the first power is applied to the ground assembly.

[0039] If an abnormal state of the ground assembly is not detected, a step of applying a second power higher than the first power to the ground assembly may be further included.

[0040] The above state information may further include state information when the ground assembly supplies a second power higher than the first power to the vehicle assembly.

[0041] In the step of detecting an abnormal state of the ground assembly, the abnormal state of the ground assembly can be detected when the temperature is outside a predetermined temperature range, the temperature change rate is outside a predetermined temperature change rate range, the impedance is outside a predetermined impedance range, at least one of the current, voltage, and power is outside at least one of the predetermined current, voltage, and power ranges, or the coupling coefficient is outside a predetermined coupling coefficient range.

[0042] The wireless charging control device further includes a step of receiving vehicle information from a vehicle assembly, and the step of detecting an abnormal state of the ground assembly further uses the vehicle information, and the vehicle information may include identification information of the vehicle assembly and at least one of current, voltage, and power of the vehicle assembly.

[0043] In another embodiment of the present invention, a wireless charging control method of a wireless charging system for an electric vehicle comprises a step of receiving status information from a plurality of ground assemblies, a step of detecting an abnormal state of each ground assembly using the status information, and a step of changing power output from a ground assembly in which an abnormal state is detected among the plurality of ground assemblies, wherein the status information includes at least one of a temperature, a temperature change rate, an impedance, a current, a voltage, a power, and a coupling coefficient of each ground assembly.

[0044] The wireless charging control device may further include a step of determining a ground assembly among the plurality of ground assemblies, the ground assembly having a different pattern for transmitting the status information from the surrounding ground assemblies, as a ground assembly in an abnormal state.

[0045] The receiving step may include a step of receiving status information from a first ground assembly that is charging a first vehicle assembly, and a step of receiving status information from the first ground assembly that is charging a second vehicle assembly following the first vehicle assembly, and in the step of detecting an abnormal state, if the abnormal state of the first ground assembly is not detected with respect to the first vehicle assembly and the abnormal state of the first ground assembly is detected with respect to the second vehicle assembly, the method may further include a step of changing power output from a second ground assembly on a path along which the second vehicle assembly will pass.

[0046] A wireless charging system for an electric vehicle according to one embodiment of the present invention comprises: a plurality of ground assemblies; and a wireless charging control device, wherein the plurality of ground assemblies are sequentially arranged and configured to transmit respective status information to the wireless charging control device, wherein the wireless charging control device is configured to detect an abnormal state of each ground assembly using the respective status information, and to change power output from a ground assembly in which an abnormal state is detected among the plurality of ground assemblies, wherein the status information includes at least one of a temperature, a temperature change rate, an impedance, a current, a voltage, a power, and a coupling coefficient of each ground assembly.

[0047] The wireless charging control device may be configured to determine a ground assembly among the plurality of ground assemblies that has a different pattern for transmitting the status information from a surrounding ground assembly as an abnormal ground assembly.

[0048] The wireless charging control device may be configured to receive status information from a first ground assembly charging a first vehicle assembly, receive status information from the first ground assembly charging a second vehicle assembly following the first vehicle assembly, and change power output from a second ground assembly on a path along which the second vehicle assembly will pass when an abnormal state of the first ground assembly is not detected with respect to the first vehicle assembly and an abnormal state of the first ground assembly is detected with respect to the second vehicle assembly.

[0049] The wireless charging control device may receive status information from a first ground assembly that is charging a first vehicle assembly, receive status information from the first ground assembly that is charging a second vehicle assembly following the first vehicle assembly, and determine that the first vehicle assembly is in an abnormal state when an abnormal state of the first ground assembly is detected with respect to the first vehicle assembly and an abnormal state of the first ground assembly is not detected with respect to the second vehicle assembly.

[0050] According to an embodiment of the present invention, a wireless charging control device for a running electric vehicle can be precisely controlled. According to an embodiment of the present invention, the wireless charging efficiency of a wireless charging control device for a running electric vehicle can be improved. According to an embodiment of the present invention, if a foreign substance exists between the ground assembly and the vehicle assembly, the foreign substance can be quickly and accurately detected.

[0051] FIG. 1 is a block diagram of an electric vehicle and a wireless charging system according to one embodiment of the present invention.

[0052] FIG. 2 is a block diagram of a wireless charging system according to one embodiment of the present invention.

[0053] FIG. 3 is a block diagram of a wireless charging device included in a wireless charging system according to one embodiment of the present invention.

[0054] FIG. 4 is a block diagram of a ground assembly included in a wireless charging system according to one embodiment of the present invention.

[0055] FIG. 5 is a block diagram of a vehicle assembly included in a wireless charging system according to one embodiment of the present invention.

[0056] FIG. 6 is a conceptual diagram of a wireless charging system according to one embodiment of the present invention.

[0057] FIG. 7 is a flowchart of a wireless charging control method of a wireless charging system according to one embodiment of the present invention.

[0058] Fig. 8 is a flowchart showing a power supply control method of a wireless charging control device according to an embodiment of the present invention.

[0059] Fig. 9 is an input voltage timing diagram controlled by the first control unit and the second control unit of Fig. 8.

[0060] Figures 10 and 11 are examples of input voltage state diagrams controlled by the first control unit and the second control unit of Figure 8.

[0061] FIG. 12 illustrates a switch between a ground assembly, a first control unit, and a second control unit arranged in an overlapping section according to an embodiment of the present invention.

[0062] Fig. 13 is an input voltage timing diagram controlled by a first control unit according to an embodiment of the present invention.

[0063] FIG. 14 is a block diagram of a wireless charging device according to another embodiment of the present invention.

[0064] Fig. 15 is a conceptual diagram of a wireless charging system according to another embodiment of the present invention.

[0065] FIGS. 16 and 17 are flowcharts of a wireless charging control method of a wireless charging system according to another embodiment of the present invention.

[0066] Fig. 18 is a flowchart illustrating a wireless charging control method of a wireless charging system according to another embodiment of the present invention.

[0067] FIG. 19 is a flowchart illustrating a wireless charging control method of a wireless charging system according to another embodiment of the present invention.

[0068] Fig. 20 is a flowchart illustrating a wireless charging control method of a wireless charging system according to another embodiment of the present invention.

[0069] Figure 21 is a drawing showing an environment in which a plurality of ground assemblies are sequentially arranged on a driving path of an electric vehicle.

[0070] FIG. 22 is a flowchart of a wireless charging control method of a wireless charging system according to an embodiment of the present invention in the environment of FIG. 21.

[0071] FIG. 23(a) is an example of a case where status information is received from a plurality of sequentially arranged ground assemblies and no abnormal state is detected from any of the ground assemblies, and FIGS. 23(b) to 23(e) are examples of a case where an abnormal state of the ground assembly (100-5) is detected.

[0072] FIG. 24(a) to FIG. 24(b) are examples in which the wireless charging control device receives temperature information from the first to fourth ground assemblies (GA1, GA2, GA3, GA4) while the first to fourth ground assemblies (GA1, GA2, GA3, GA4) are arranged.

[0073] Fig. 25 shows an example in which a wireless charging control method according to an embodiment of the present invention is applied.

[0074] Fig. 26 shows another example to which a wireless charging control method according to an embodiment of the present invention is applied.

[0075] Fig. 27 shows another example in which a wireless charging control method according to an embodiment of the present invention is applied.

[0076] Fig. 28 shows another example in which a wireless charging control method according to an embodiment of the present invention is applied.

[0077] Fig. 29 shows another example in which a wireless charging control method according to an embodiment of the present invention is applied.

[0078] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0079] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, but can be implemented in various different forms, and within the scope of the technical idea of ​​the present invention, one or more of the components between the embodiments can be selectively combined or substituted for use.

[0080] In addition, terms (including technical and scientific terms) used in the embodiments of the present invention may be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the present invention belongs, unless explicitly and specifically defined and described, and terms that are commonly used, such as terms defined in a dictionary, may be interpreted in consideration of the contextual meaning of the relevant technology.

[0081] Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention.

[0082] In this specification, the singular may also include the plural unless specifically stated otherwise in the phrase, and when it is described as “A and / or at least one (or more) of B, C”, it may include one or more of all combinations that can be combined with A, B, C.

[0083] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0084] These terms are intended only to distinguish one component from another, and are not intended to limit the nature, order, or sequence of the component.

[0085] And, when a component is described as being 'connected', 'coupled' or 'connected' to another component, it may include not only cases where the component is directly connected, coupled or connected to the other component, but also cases where the component is 'connected', 'coupled' or 'connected' by another component between the component and the other component.

[0086] Additionally, when described as being formed or arranged "above or below" each component, "above" or "below" includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or arranged between the two components. Furthermore, when expressed as "above" or "below", it can include the meaning of a downward direction as well as an upward direction based on one component.

[0087] Hereinafter, embodiments will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or corresponding components are given the same reference numbers, and redundant descriptions thereof will be omitted.

[0088] FIG. 1 is a block diagram of an electric vehicle and a wireless charging system according to one embodiment of the present invention, FIG. 2 is a block diagram of a wireless charging system according to one embodiment of the present invention, FIG. 3 is a block diagram of a wireless charging device included in a wireless charging system according to one embodiment of the present invention, FIG. 4 is a block diagram of a ground assembly included in a wireless charging system according to one embodiment of the present invention, and FIG. 5 is a block diagram of a vehicle assembly included in a wireless charging system according to one embodiment of the present invention.

[0089] Referring to FIG. 1, an electric vehicle (EV) 10 can be charged by a wireless charging system (20). In this specification, an electric vehicle (10) means a vehicle propelled by an electric motor that draws current from a rechargeable storage battery or other portable energy storage device.

[0090] According to an embodiment of the present invention, the electric vehicle (10) may be a vehicle that can be recharged through a wireless charging method without using a physical plug and socket.

[0091] Referring to FIGS. 2 to 5, the wireless charging system (20) includes a ground assembly (GA, 100), a vehicle assembly (VA, 200), and a wireless charging device (300).

[0092] The ground assembly (100) is placed on the floor of a parking lot or on a road, or at least partially buried, and the vehicle assembly (200) can be mounted on an electric vehicle (10). The vehicle assembly (200) is mounted on the lower part of the electric vehicle (10) and aligned to face the ground assembly (100) buried in the floor of a parking lot or on a road, and can wirelessly receive power from the ground assembly (100).

[0093] In the case of a static wireless power transfer method, a ground assembly (100) is placed on the floor of a parking lot, and a transmitting coil (110) of the ground assembly (100) can be aligned with a receiving coil (210) of a vehicle assembly (200) mounted on a parked electric vehicle (10). In the case of a dynamic wireless power transfer method, a ground assembly (100) is placed on a road, and a transmitting coil (110) of the ground assembly (100) can be aligned with a receiving coil (210) of a vehicle assembly (200) mounted on a running electric vehicle (10).

[0094] The wireless charging device (300) controls the ground assembly (100) and / or the vehicle assembly (200) and supplies power to the ground assembly (100). To this end, the wireless charging device (300) communicates with the ground assembly (100) and / or the vehicle assembly (200) and can transmit control signals to each of the ground assembly (100) and the vehicle assembly (200). The wireless charging device (100) may be an electric vehicle supply equipment (EVSE) or a part of the EVSE.

[0095] The wireless charging device (300) includes a control unit (310), a communication unit (320), and a power supply unit (330). The control unit (310) controls the transmitting coil of the ground assembly (100). The communication unit (320) communicates with the electric vehicle (10) or an electric vehicle communication controller (EVCC) mounted on the electric vehicle (10), and also communicates with the ground assembly (100). The power supply unit (330) supplies power to the receiving coil of the vehicle assembly (200) mounted on the electric vehicle (10) through the transmitting coil of the ground assembly (100). The control unit (310) and the communication unit (320) of the wireless charging device (300) may be a supply equipment communication controller (SECC). In this specification, the control unit (310) and the communication unit (320) of the wireless charging device (300) may also be referred to as a wireless charging control device or controller.

[0096] Meanwhile, the ground assembly (100) may include a transmitting coil (110), a first control circuit (120), and a first communication unit (130), and the vehicle assembly (200) may include a receiving coil (210), a second control circuit (220), and a second communication unit (230).

[0097] When the vehicle assembly (200) is aligned on the ground assembly (100), signal exchange for establishing a connection can be performed between the first communication unit (130) of the ground assembly (100) and the second communication unit (230) of the vehicle assembly (200). For example, the first communication unit (130) of the ground assembly (100) may periodically transmit a ping signal, and the second communication unit (230) of the vehicle assembly (200) that receives the ping signal may establish a connection through signal exchange with the first communication unit (130) of the ground assembly (100).

[0098] The first communication unit (130) of the ground assembly (100) and the second communication unit (230) of the vehicle assembly (200) may communicate with the wireless charging device (300). For example, the first communication unit (130) of the ground assembly (100) may transmit status information to the wireless charging device (300), and the wireless charging device (300) may transmit a control signal for wireless power transmission to the first communication unit (130) of the ground assembly (100). The first communication unit (130) of the ground assembly (100) may drive the first control circuit (120) based on the control signal received from the wireless charging device (300), and the transmitting coil (110) may be controlled according to the driving of the first control circuit (120). In addition, the second communication unit (230) of the vehicle assembly (200) can transmit vehicle information to the wireless charging device (300), and the wireless charging device (300) can transmit a control signal for wireless power reception to the second communication unit (230) of the vehicle assembly (200). The second communication unit (230) of the vehicle assembly (200) drives the second control circuit (220) based on the control signal received from the wireless charging device (300), and the receiving coil (210) can be controlled according to the driving of the second control circuit (220). However, the embodiment of the present invention is not limited thereto, and some components of the first control circuit (120) and the first communication unit (130) of the ground assembly (100) may be included in the wireless charging device (300), and some components of the second control circuit (220) and the second communication unit (230) of the vehicle assembly (200) may be included in the EVCC mounted on the electric vehicle (10).

[0099] An embodiment of the present invention relates to dynamic wireless power transfer for charging a running electric vehicle (10).

[0100] FIG. 6 is a conceptual diagram of a wireless charging system according to one embodiment of the present invention, and FIG. 7 is a flowchart of a wireless charging control method of a wireless charging system according to one embodiment of the present invention.

[0101] Referring to Fig. 6, a plurality of ground assemblies are sequentially arranged on a driving charging road. Here, the driving charging road refers to a road that enables wireless charging for a driving electric vehicle (10). Here, the transmitting coil of the ground assembly may be used interchangeably with a segment.

[0102] When an electric vehicle (10) drives on a driving charging road, the receiving coil of the vehicle assembly (300) mounted on the lower part of the electric vehicle (10) is aligned with the transmitting coil placed on the driving charging road, and receives power wirelessly from the transmitting coil.

[0103] A wireless charging control device according to an embodiment of the present invention acquires vehicle information from an electric vehicle (10) entering a driving charging road, and controls power supply to a plurality of ground assemblies sequentially arranged on the driving charging road based on the acquired vehicle information. This can enhance wireless charging efficiency.

[0104] In dynamic wireless power transfer, vehicle detection is a crucial element for safe and efficient power transfer. When an electric vehicle (10) enters a charging road and is placed on a ground assembly, power transfer begins. If the electric vehicle (10) leaves the ground assembly, power transfer must be immediately terminated. This process is based on vehicle detection.

[0105] Vehicle detection is achieved through point-to-point signaling (P2PS) using radio frequency (RF). The wireless charging control device uses RF to detect the location of an electric vehicle (10) driving on a charging road and determines which ground assembly is used to initiate power transfer.

[0106] A wireless charging control device controls a plurality of ground assemblies placed on a driving charging road, and each ground assembly is connected to the wireless charging control device through a P2PS communication line, and can detect an electric vehicle (10) running on the ground assembly.

[0107] For example, the vehicle detection procedure may be a two-way wireless P2PS. In the two-way wireless P2PS, the wireless charging control device and the electric vehicle (10) detect information. The two-way wireless P2PS may be used not only to exchange information between the wireless charging control device and the electric vehicle (10), but also to detect the position of the electric vehicle (10) while it is driving on the ground assembly.

[0108] Vehicle detection can be triggered by the ground assembly broadcasting information of the infrastructure signal, the broadcast signal of the ground assembly reaches the EVCC mounted on the electric vehicle (10) running on the ground assembly, and the EVCC mounted on the electric vehicle (10) can transmit a response signal including information on whether the electric vehicle (10) requires charging or not. The wireless charging control device determines whether to charge the ground assembly or not based on the response signal of the electric vehicle (10).

[0109] Meanwhile, supplying or cutting off power to the ground assembly depending on the location of the electric vehicle (10) is very important from a safety and efficiency perspective. Ground assembly switching means that when the electric vehicle (10) moves to the next ground assembly, power is supplied to the next ground assembly and power is cut off to the current ground assembly, and can be used interchangeably with segment switching, transmitting coil switching, handover, etc.

[0110] According to an embodiment of the present invention, a first control unit (600#1) controls power supply to ground assemblies (GA1 to GA6) arranged in a first area (A1) among a plurality of ground assemblies, a second control unit (600#2) controls power supply to ground assemblies (GA5 to GA9) arranged in a second area (A2) among a plurality of ground assemblies, and a third control unit (600#3) controls power supply to ground assemblies (GA8 to GA12) arranged in a third area (A3) among a plurality of ground assemblies. The first area (A1) and the second area (A2) may include a first overlapping section (OA1) overlapping with each other, and the second area (A2) and the third area (A3) may include a second overlapping section (OA2) overlapping with each other. According to an embodiment of the present invention, each of the first control unit (600#1), the second control unit (600#2), and the third control unit (600#3) may be the wireless charging control device described above. That is, each of the first control unit (600#1), the second control unit (600#2), and the third control unit (600#3) may include the control unit (310) and the communication unit (320) described through FIG. 3. According to another embodiment of the present invention, in the wireless charging control device including the control unit (310) and the communication unit (320) described through FIG. 3, the control unit (310) may include the first control unit (600#1), the second control unit (600#2), and the third control unit (600#3).

[0111] Hereinafter, a wireless charging control method of a wireless charging control device will be described when an electric vehicle (10) is driven in a direction from a ground assembly (GA1) toward a ground assembly (GA12).

[0112] Referring to FIG. 7, the first control unit (600#1) detects the entry of an electric vehicle (10) into the first area (A1) (S700). As described above, step S700 is triggered by the ground assembly (GA1) disposed in the first area (A1) broadcasting information of an infrastructure signal, and when the EVCC mounted on the electric vehicle (10) or the MCU of the electric vehicle (10) transmits a response signal to the broadcast signal of the ground assembly (GA1), the entry of the electric vehicle (10) can be detected.

[0113] Next, the first control unit (600#1) obtains vehicle information of the electric vehicle (10) (S710). Here, the vehicle information may include charging information of the electric vehicle (10). The charging information of the electric vehicle (10) may include information on whether the electric vehicle (10) requires charging or not. As described above, the charging information of the electric vehicle (10) may be included in the response signal in step S700. The charging information of the electric vehicle (10) in response to the broadcast signal of the ground assembly (GA1) by the EVCC mounted in the electric vehicle (10) or the MCU of the electric vehicle (10) may further include information on whether the electric vehicle (10) is chargeable, battery specification information of the electric vehicle (10), and the remaining battery capacity of the electric vehicle (10). The vehicle information may further include speed information of the electric vehicle (10). The speed information of the electric vehicle (10) may include current speed information and acceleration information of the electric vehicle (10). In addition to this, the vehicle information may further include specification information of the electric vehicle (10), specification information of the EVCC mounted on the electric vehicle (10), specification information of the vehicle assembly mounted on the electric vehicle (10), etc.

[0114] Next, the first control unit (600#1) transmits the vehicle information of the electric vehicle (10) acquired in step S710 to the second control unit (600#2) (S720). At this time, the first control unit (600#1) and the second control unit (600#2) can communicate directly. Alternatively, the first control unit (600#1) and the second control unit (600#2) may communicate through a higher management server (not shown). The power supply control of the second control unit (600#2) can be triggered by the vehicle information transmission of the first control unit (600#1). Accordingly, the second control unit (600#2) can operate in a slim mode until triggered by the first control unit (600#1), thereby reducing the power consumption of the second control unit (600#2).

[0115] Meanwhile, the first control unit (600#1) controls the power supply of a plurality of ground assemblies (GA1 to GA6) arranged in the first area (A1) (S730). To this end, each of the plurality of ground assemblies (GA1 to GA6) may be connected to the first control unit (600#1) via a communication line. For example, each of the plurality of ground assemblies (GA1 to GA6) may perform P2P signaling with the first control unit (600#1).

[0116] In addition, the second control unit (600#2) controls the power supply of the plurality of ground assemblies (GA5 to GA9) arranged in the second area (A2) using the vehicle information of the electric vehicle (10) received from the first control unit (600#1) (S740). Each of the plurality of ground assemblies (GA5 to GA9) arranged in the second area (A2) can be connected to the second control unit (600#2) via a communication line. For example, each of the plurality of ground assemblies (GA5 to GA9) can perform P2P signaling with the second control unit (600#2).

[0117] According to an embodiment of the present invention, when a plurality of ground assemblies (GA1 to GA9) are sequentially arranged along the driving direction of the electric vehicle (10), the first control unit (600#1) and the second control unit (600#2) can sequentially control the power supply of the plurality of ground assemblies (GA1 to GA9). According to an embodiment of the present invention, the first control unit (600#1) controls the first input voltage section, the second input voltage section, and the third input voltage section to be sequentially performed for the first area (A1), and the second control unit (600#2) controls the first input voltage section, the second input voltage section, and the third input voltage section to be sequentially performed for the second area (A2). The first input voltage section may be referred to as a prepower state, and may mean a state before power for wireless charging is transmitted to the vehicle assembly, which is a section in which the input voltage to the ground assembly increases over time. The second input voltage section may refer to a state in which power for wireless charging is applied, and may include a power transfer state. The voltage input to the ground assembly in the second input voltage section may be higher than the voltage input to the ground assembly in the first input voltage section. The voltage input to the ground assembly during the second input voltage section may be maintained at the highest voltage. Alternatively, although not shown, the second input voltage section may include a section in which the voltage temporarily decreases from the highest voltage and then increases back to the highest voltage. The third input voltage section may be referred to as a postpower state, and may refer to a section in which the input voltage to the ground assembly decreases over time. After the third input voltage section, the input voltage to the ground assembly may be 0.Alternatively, the inverter rise state may progress further before the first input voltage section, which is the pre-power state, and the inverter fall state may progress further after the third input voltage section, which is the post-power state.

[0118] According to an embodiment of the present invention, the first input voltage section, the second input voltage section, and the third input voltage section controlled by the second control unit (600#2) follow the first input voltage section, the second input voltage section, and the third input voltage section controlled by the first control unit (600#1). As described above, the first area (A1) controlled by the first control unit (600#1) and the second area (A2) controlled by the second control unit (600#2) are sequentially arranged along the driving direction of the electric vehicle (10), so that the electric vehicle (10) first drives in the first area (A1) and then drives in the second area (A2). Accordingly, since the ground assembly in which the electric vehicle (10) is driving can operate in the second input voltage section, the wireless charging efficiency can be maximized.

[0119] FIG. 8 is a flowchart showing a power supply control method of a wireless charging control device according to an embodiment of the present invention, FIG. 9 is an input voltage timing diagram controlled by the first control unit and the second control unit of FIG. 8, and FIGS. 10 to 11 are examples of input voltage state diagrams controlled by the first control unit and the second control unit of FIG. 8.

[0120] Referring to FIG. 8, the first control unit (600#1) initiates a first input voltage section for the first area (A1) (S800). That is, the input voltage for the first area (A1) is increased over time before power for wireless charging is transmitted.

[0121] Next, the first control unit (600#1) initiates a second input voltage section for the first region (A1) and maintains the second input voltage section for a predetermined period of time (S810). The second input voltage section may be a power transmission section for wireless charging. The voltage input to the first region (A1) in the second input voltage section may be higher than the voltage input to the first region (A1) in the first input voltage section.

[0122] Next, the first control unit (600#1) initiates a third input voltage interval for the first region (A1) (S820). During the third input voltage interval, the voltage input to the first region (A1) may decrease over time. When the third input voltage interval ends, the voltage input to the first region (A1) may be 0.

[0123] In addition, the second control unit (600#2) calculates the power supply timing for the second area (A2) based on the vehicle information received from the first control unit (600#1) (S830). Here, the power supply timing may include the start time of the first input voltage section, the start time of the second input voltage section, the maintenance period of the second input voltage section, and the start time of the third input voltage section. The second control unit (600#2) predicts the time when the electric vehicle (10) reaches the second area (A2), the period of driving in the second area (A2), and the time when it leaves the second area (A2) based on the location information and speed information of the electric vehicle (10) included in the vehicle information received from the first control unit (600#1), and can calculate the power supply timing for the second area (A2) accordingly.

[0124] Then, the second control unit (600#2) starts the first input voltage section for the second area (A2) (S840), starts the second input voltage section for the second area (A12), maintains the second input voltage section for a predetermined period of time (S850), and starts the third input voltage section for the second area (A2) (S860).

[0125] At this time, as illustrated in FIG. 9, a part of the second input voltage section (A1_P2) of the first control unit (600#1) may overlap a part of the first input voltage section (A2_P1) of the second control unit (600#2). That is, while wireless charging is in progress for an electric vehicle (10) running in the first area (A1), the second area (A2) may prepare for wireless charging for the electric vehicle (10). Accordingly, since the ground assembly in which the electric vehicle (10) is running may operate in the second input voltage section, the wireless charging efficiency may be maximized.

[0126] That is, the starting point of the first input voltage section (A2_P1) of the second control unit (600#2) may overlap with the first input voltage section (A1_P1) of the first control unit (600#1) or the second input voltage section (A1_P2) of the first control unit (600#1). For example, as illustrated in FIG. 10, the starting point of the pre-power state of the second control unit (600#2) may overlap with the power transmission state of the first control unit (600#1). Alternatively, as illustrated in FIG. 11, the starting point of the pre-power state of the second control unit (600#2) may overlap with the pre-power state of the first control unit (600#1). Accordingly, the second control unit (600#2) can quickly reach the power transmission state or reach it in advance when the electric vehicle (10) approaches the second area (A2), thereby increasing the wireless charging efficiency.

[0127] The start time of the second input voltage section (A2_P2) of the second control unit (600#2) may overlap with the second input voltage section (A1_P2) of the first control unit (600#1). For example, as illustrated in FIGS. 10 and 11, the start time of the power transmission state of the second control unit (600#2) may overlap with the power transmission state of the first control unit (600#1). Accordingly, the second control unit (600#2) can quickly reach the power transmission state or reach it in advance when the electric vehicle (10) approaches the second area (A2), thereby increasing the wireless charging efficiency.

[0128] Meanwhile, referring back to FIG. 6, the first area (A1) and the second area (A2) may include an overlapping section that overlaps with each other. For example, the ground assemblies (GA5, GA6) may be arranged in the overlapping section (OA1) of the first area (A1) and the second area (A2). According to an embodiment of the present invention, the ground assemblies (GA5, GA6) arranged in the overlapping section of the first area (A1) controlled by the first control unit (600#1) and the second area (A2) controlled by the second control unit (600#2) may be controlled by the first control unit (600#1) or the second control unit (600#2).

[0129] To this end, in step S720 of FIG. 7, the first control unit (600#1) can transmit vehicle information of the electric vehicle (10) to the second control unit (600#2) before the electric vehicle (10) enters the overlapping section. Accordingly, the power supply control of the second control unit (600#2) can be triggered, and the ground assemblies (GA5, GA6) arranged in the overlapping section can be controlled by the first control unit (600#1) or the second control unit (600#2).

[0130] According to an embodiment of the present invention, a switch (SW) may be connected between each ground assembly, the first control unit (600#1) and the second control unit (600#2) arranged in the overlapping section.

[0131] FIG. 12 illustrates a switch between a ground assembly, a first control unit, and a second control unit arranged in an overlapping section according to an embodiment of the present invention.

[0132] Referring to Fig. 12(a), when the switch (SW) is in a first state connected to the first control unit (600#1), the ground assembly (GA5) is controlled by the first control unit (600#1), and referring to Fig. 12(b), when the switch (SW) is in a second state connected to the second control unit (600#2), the ground assembly (GA5) can be controlled by the second control unit (600#2). For example, the switch (SW) can be connected to a control unit in a high input voltage state among the first control unit (600#1) and the second control unit (600#2). Accordingly, the ground assembly (GA5) can be controlled by a control unit in a high input voltage state among the first control unit (600#1) and the second control unit (600#2). Here, the switch (SW) may be a hardware device including a DC-DC converter. The switch (SW) may be a hardware device including a full-bridge converter or a half-bridge converter. Alternatively, the functions of the switch (SW) may be implemented in software.

[0133] Accordingly, the ground assembly placed in the overlapping section can be controlled by the control unit in a high input voltage state without conflict between the first control unit (600#1) and the second control unit (600#2), and thus high wireless charging efficiency can be achieved.

[0134] According to an embodiment of the present invention, the input voltage ranges may also be sequentially controlled for a plurality of ground assemblies controlled by one control unit.

[0135] Fig. 13 is an input voltage timing diagram controlled by a first control unit according to an embodiment of the present invention.

[0136] In Fig. 13, an input voltage timing diagram for two ground assemblies (GA2 to GA3) among a plurality of ground assemblies (GA1 to GA6) arranged in a first area (A1) controlled by a first control unit (600#1) is shown as an example.

[0137] Here, when two ground assemblies (GA2 to GA3) are sequentially arranged along the driving direction of the electric vehicle (10), the first control unit (600#1) can sequentially control the power supply of the two ground assemblies (GA2 to GA3). According to an embodiment of the present invention, the first control unit (600#1) can control the first input voltage section, the second input voltage section, and the third input voltage section to be sequentially performed for each ground assembly. That is, the first input voltage section, the second input voltage section, and the third input voltage section can be controlled to be sequentially performed for the ground assembly (GA2), and the first input voltage section, the second input voltage section, and the third input voltage section can be controlled to be sequentially performed for the ground assembly (GA3).

[0138] At this time, the first input voltage section (GA3_P1), the second input voltage section (GA3_P2), and the third input voltage section (GA3_P3) for the ground assembly (GA3) may follow the first input voltage section (GA2_P1), the second input voltage section (GA2_P2), and the third input voltage section (GA2_P3) for the ground assembly (GA2).

[0139] For example, the start time of the first input voltage section of the ground assembly (GA3) may overlap with the first input voltage section or the second input voltage section of the ground assembly (GA2).

[0140] Additionally, the start point of the second input voltage section of the ground assembly (GA3) may overlap with the second input voltage section of the ground assembly (GA2).

[0141] For convenience of explanation, only the timing diagram for two ground assemblies (GA2, GA3) is shown, but the input voltages for the other ground assemblies arranged in the first area (A1) may also be sequentially controlled according to their positions on the driving charging road. That is, the first input voltage section, the second input voltage section, and the third input voltage section for the ground assembly (GA2) may follow the first input voltage section, the second input voltage section, and the third input voltage section for the ground assembly (GA1), and the first input voltage section, the second input voltage section, and the third input voltage section for the ground assembly (GA4) may follow the first input voltage section, the second input voltage section, and the third input voltage section for the ground assembly (GA3).

[0142] According to this, the wireless charging efficiency can be increased because the electric vehicle (10) quickly reaches the power transmission state or reaches it in advance when approaching each ground assembly.

[0143] Meanwhile, another embodiment of the present invention relates to a wireless charging control method of a wireless charging control device when an emergency situation occurs during dynamic wireless power transfer for charging a running electric vehicle (10). Duplicate descriptions of the same content as described with reference to FIGS. 1 to 13 will be omitted.

[0144] FIG. 14 is a block diagram of a wireless charging device according to another embodiment of the present invention, FIG. 15 is a conceptual diagram of a wireless charging system according to another embodiment of the present invention, and FIGS. 16 to 17 are flowcharts of a wireless charging control method of a wireless charging system according to another embodiment of the present invention.

[0145] Referring to FIG. 14, the wireless charging device (300) may further include a display unit (340) and an emergency signal input unit (350).

[0146] Supplying or cutting off power to the ground assembly depending on the location of the electric vehicle (10) is very important from a safety and efficiency perspective.

[0147] Referring to FIGS. 15 and 16 , the wireless charging control device receives status information from at least one of a plurality of ground assemblies (GA1, ..., GA12) arranged on a driving charging road, an electric vehicle (10), a vehicle assembly (200) mounted on the electric vehicle (10), and an external management device (not shown) (S1700). As described above, the wireless charging control device may perform P2PS to receive status information from the plurality of ground assemblies (GA1, ..., GA12). For example, the status information received from the plurality of ground assemblies (GA1, ..., GA12) may be temperature information around the plurality of ground assemblies (GA1, ..., GA12), magnetic field information, current information flowing through the plurality of ground assemblies (GA1, ..., GAAn), leakage current information around the plurality of ground assemblies (GA1, ..., GA12), etc. Alternatively, the wireless charging control device may receive status information from the MCU of the electric vehicle (10), the EVCC mounted on the electric vehicle (10), or the vehicle assembly (200) mounted on the electric vehicle (10) using wireless communication. Here, the vehicle assembly (200) mounted on the electric vehicle (10) may communicate directly with the wireless charging control device or communicate through the MCU of the electric vehicle (10). For example, the status information received from the MCU of the electric vehicle (10) may be forward shooting information of the electric vehicle (10), weather information around the electric vehicle (10), speed information of the electric vehicle (10), acceleration information of the electric vehicle (10), other emergency status information, etc. The status information received from the EVCC mounted on the electric vehicle (10) may be battery information of the electric vehicle (10), charging status information, etc.Status information received from the vehicle assembly (200) mounted on the electric vehicle (10) may include temperature information of the vehicle assembly (200), magnetic field information of the vehicle assembly (200), current information flowing through the vehicle assembly (200), leakage current information around the vehicle assembly (200), etc. Alternatively, the wireless charging control device may receive status information from an external management device (not shown) using wireless communication. For example, status information received from the external management device (not shown) may include road status information, traffic volume information, other emergency status information, etc.

[0148] Next, the wireless charging control device detects an emergency condition using the status information received in step S1700 (S1710). In an embodiment of the present invention, an emergency condition may refer to a condition requiring the interruption of power supply to the ground assembly. For example, an emergency condition may be one in which continued power supply to the ground assembly could cause a malfunction or electric shock in a running electric vehicle, posing a threat to the driver's safety. For example, when a failure occurs in at least some of the plurality of ground assemblies (GA1, ..., GA12), the temperature around the ground assemblies (GA1, ..., GA12) may be higher than the normal temperature, a high magnetic field may be detected around the ground assemblies (GA1, ..., GA12), a current flowing through the plurality of ground assemblies (GA1, ..., GA12) may be significantly increased, a current flowing through the plurality of ground assemblies (GA1, ..., GA12) may be significantly decreased, or a leakage current may be detected around the plurality of ground assemblies (GA1, ..., GA12), and the wireless charging control device may detect an emergency state using this status information. As another example, if a foreign substance is placed on at least some of the plurality of ground assemblies (GA1, ..., GA12), the temperature around the ground assemblies (GA1, ..., GA12) is higher than the normal temperature, a high magnetic field is detected around the ground assemblies (GA1, ..., GA12), or a foreign substance can be detected by a camera of the electric vehicle (10), and the wireless charging control device can detect an emergency state using such status information. As another example, if the road surface of the driving charging road is bad, or an accident or fire has occurred, the road condition, the speed of the electric vehicle (10), the traffic volume, etc. can be detected by the electric vehicle (10) or an external management device (not shown), and the wireless charging control device can detect an emergency state using such status information.As another example, when wireless charging is dangerous due to heavy rain, heavy snow, wind, etc., the wireless charging control device can receive such status information from the electric vehicle (10) or an external management device and detect an emergency state based on this.

[0149] Referring to FIG. 17, instead of detecting an emergency condition in step S1710 using the status information received in step S1700, the wireless charging control device may receive an emergency signal (S1800). To this end, the wireless charging control device may further include an emergency signal input unit (350) installed along the driving charging road. The emergency signal input unit (350) may be operated by the driver of the electric vehicle (10) or the manager of the driving charging road. When an emergency signal is input through the emergency signal input unit (350), the wireless charging control device may detect an emergency condition. For example, if an emergency condition is recognized by the driver or manager with the naked eye, such as an accident or fire on the driving charging road, the presence of foreign substances, poor road conditions, or the ground assembly being exposed to the outside, an emergency signal may be input through the emergency signal input unit (350). Accordingly, even if communication between at least a part of the wireless charging control device, the ground assembly (100), the electric vehicle (10), the vehicle assembly (200) and the external management device is not smooth, power supply control according to an emergency state is possible.

[0150] Referring again to FIGS. 15 to 17, when the wireless charging control device detects an emergency state, it stops supplying power to at least some of the plurality of ground assemblies (S1720, S1810). According to an embodiment of the present invention, the plurality of ground assemblies (GA1, ..., GA12) may include a first ground assembly set (GAS1), a second ground assembly set (GAS2), a third ground assembly set (GAS3), and a fourth ground assembly set (GAS4) sequentially arranged along the driving direction of the electric vehicle (10) on the driving charging road. Each ground assembly set may include a plurality of ground assemblies sequentially arranged along the driving direction of the electric vehicle (10). The first ground assembly set (GAS1), the second ground assembly set (GAS2), the third ground assembly set (GAS3), and the fourth ground assembly set (GAS4) may be arranged to be spaced apart from each other. At this time, the wireless charging control device can control at least one of the power supply interruption period, the power supply interruption area, and the power supply interruption speed depending on the emergency state. For example, if the emergency state detected in step S1710 is determined to be a temporary emergency state, the wireless charging control device can interrupt power supply for a first period, and if the emergency state detected in step S1710 is determined not to be a temporary emergency state, the wireless charging control device can interrupt power supply for a second period that is longer than the first period.As another example, if it is determined that the emergency state detected in step S1710 is an emergency state for the first ground assembly set (GAS1), the wireless charging control device may stop supplying power to the first ground assembly set (GAS1), and if it is determined that the emergency state detected in step S710 is an emergency state for the first ground assembly set (GAS1) and the second ground assembly set (GAS2), the wireless charging control device may stop supplying power to the first ground assembly set (GAS1) and the second ground assembly set (GAS2). As another example, if it is determined that the emergency state detected in step S1710 is an extremely dangerous emergency state where power supply can no longer be maintained, the wireless charging control device may immediately stop supplying power, and if it is determined that the emergency state detected in step S1710 is not an extremely dangerous emergency state, the wireless charging control device may gradually stop supplying power.

[0151] Next, the wireless charging control device indicates an emergency state (S1730, S1820). To this end, the wireless charging control device according to an embodiment of the present invention is installed along a driving charging road and further includes a display unit (340) that indicates an emergency state. Accordingly, the driver of the electric vehicle (10) can recognize an emergency state on the driving charging road and make a detour. Furthermore, the manager of the driving charging road can recognize and manage an emergency state on the driving charging road.

[0152] According to an embodiment of the present invention, the display unit (340) and emergency signal input unit (350) of the wireless charging control device may be mounted on a structure installed along a driving charging road. For example, the structure installed along the driving charging road may be a guardrail. When the display unit (340) and emergency signal input unit (350) are mounted on a guardrail, emergency status detection and display are possible without interfering with the driving of the electric vehicle (10).

[0153] As described above, the plurality of ground assemblies (GA1, ..., GA12) may include a first ground assembly set (GAS1), a second ground assembly set (GAS2), a third ground assembly set (GAS3), and a fourth ground assembly set (GAS4) arranged to be spaced apart from each other.

[0154] At this time, each of the first ground assembly set (GAS1), the second ground assembly set (GAS2), the third ground assembly set (GAS3), and the fourth ground assembly set (GAS4) can be independently controlled. To this end, the control unit (310) can control each of the first ground assembly set (GAS1), the second ground assembly set (GAS2), the third ground assembly set (GAS3), and the fourth ground assembly set (GAS4). Alternatively, as illustrated, the control unit (310) may include a first control unit (310#1) that controls the first ground assembly set (GAS1), a second control unit (310#2) that controls the second ground assembly set (GAS2), a third control unit (310#3) that controls the third ground assembly set (GAS3), and a fourth control unit (310#4) that controls the fourth ground assembly set (GAS4).

[0155] Likewise, the display unit (340) includes a first display unit (340#1) for displaying an emergency state of the first ground assembly set (GAS1), a second display unit (340#2) for displaying an emergency state of the second ground assembly set (GAS2), a third display unit (340#3) for displaying an emergency state of the third ground assembly set (GAS3), and a fourth display unit (340#4) for displaying an emergency state of the fourth ground assembly set (GAS4), and the emergency signal input unit (350) includes a first emergency signal input unit (350#1) for inputting an emergency signal for the first ground assembly set (GAS1), a second emergency signal input unit (350#2) for inputting an emergency signal for the second ground assembly set (GAS2), a third emergency signal input unit (350#3) for inputting an emergency signal for the third ground assembly set (GAS3), and a fourth emergency signal input unit (350#4) for inputting an emergency signal for the fourth ground assembly set (GAS4). A fourth emergency signal input unit (350#4) may be included. At this time, the first display unit (340#1), the second display unit (340#2), the third display unit (340#3), and the fourth display unit (340#4) may be independently controlled. For this purpose, the control unit (310) may control the first display unit (340#1), the second display unit (340#2), the third display unit (340#3), and the fourth display unit (340#4), respectively. Alternatively, the first control unit (310#1) may control the first display unit (340#1), the second control unit (320#2) may control the second display unit (340#2), the third control unit (310#3) may control the third display unit (340#3), and the fourth control unit (320#4) may control the fourth display unit (340#4). In addition, the first emergency signal input unit (350#1), the second emergency signal input unit (350#2), the third emergency signal input unit (350#3), and the fourth emergency signal input unit (350#4) can be independently controlled.To this end, the control unit (310) can control the first emergency signal input unit (350#1), the second emergency signal input unit (350#2), the third emergency signal input unit (350#3), and the fourth emergency signal input unit (350#4), respectively. Alternatively, the first control unit (310#1) can control the first emergency signal input unit (350#1), the second control unit (320#2) can control the second emergency signal input unit (350#2), the third control unit (320#3) can control the third emergency signal input unit (350#3), and the fourth control unit (320#4) can control the fourth emergency signal input unit (350#4).

[0156] According to an embodiment of the present invention, the display unit (340) and the emergency signal input unit (350) may be arranged to overlap a separation zone (SZ) between ground assembly sets in a direction perpendicular to the driving direction of the electric vehicle (10). For example, the separation zone (SZ) between ground assembly sets is an area that is relatively safe from a magnetic field compared to the area where the ground assembly sets are arranged. Accordingly, the safety of a driver or manager attempting to operate the emergency signal input unit (350) can be ensured.

[0157] According to an embodiment of the present invention, the first display unit (340#1) includes a first start indicator light (not shown) arranged at a starting point of the first ground assembly set (GAS1) and a first end indicator light (340#1T) arranged at an ending point of the first ground assembly set (GAS1), the second display unit (340#2) includes a second start indicator light (340#2S) arranged at a starting point of the second ground assembly set (GAS2) and a second end indicator light (340#2T) arranged at an ending point of the second ground assembly set (GAS2), the third display unit (340#3) includes a third start indicator light (340#3S) arranged at a starting point of the third ground assembly set (GAS3) and a second end indicator light (340#3T) arranged at an ending point of the third ground assembly set (GAS3), and the fourth display unit (340#4) includes a fourth ground assembly set (GAS1). A fourth start indicator light (340#4S) positioned at the starting point of the set (GAS4) and a fourth end indicator light (not shown) positioned at the ending point of the fourth ground assembly set (GAS4) may be included. For example, in the case of an emergency state of the first ground assembly set (GAS1), both the first start indicator light and the first end indicator light (340#1T) may be turned on, and in the case of an emergency state of the second ground assembly set (GAS2), both the second start indicator light (340#2S) and the second end indicator light (340#2T) may be turned on. Accordingly, the driver of the electric vehicle (10) can easily recognize the starting point and the ending point of the emergency state, and thus can efficiently bypass the area where the emergency state has occurred.

[0158] According to an embodiment of the present invention, the emergency signal input unit (350) may be positioned between the display units (340). For example, the second emergency signal input unit (350#2) may be positioned between the first end indicator light (340#1T) and the second start indicator light (340#2S). For example, the first end indicator light (340#1T), the second emergency signal input unit (350#2), and the second start indicator light (340#2S) may be positioned on a single structure. Accordingly, the structure is easy to install and manage, and drivers and managers can safely input emergency signals.

[0159] In addition, the wireless charging control device can transmit an emergency status to the electric vehicle (10) or a vehicle assembly (200) mounted on the electric vehicle (10) (S1740, S1830). Accordingly, the driver can recognize the emergency status not only through the display unit (340) of the driving charging road, but also through the display of the electric vehicle (10), thereby enabling safer driving.

[0160] According to another embodiment of the present invention, a wireless charging control device detects an abnormal state of the ground assembly (100) based on status information received from the ground assembly (100) and controls the ground assembly (100). In the present specification, an abnormal state may mean a state in which a foreign object exists in the ground assembly (100) or a state in which LOP (living object protection) is required. Duplicate descriptions of the same contents as those described using FIGS. 1 to 17 will be omitted.

[0161] Fig. 18 is a flowchart illustrating a wireless charging control method of a wireless charging system according to another embodiment of the present invention.

[0162] Referring to FIG. 18, the ground assembly (100) and the vehicle assembly (200) perform signal exchange for connection establishment (S2500). For example, the ground assembly (100) periodically transmits a ping signal, and the vehicle assembly (200) within the coverage of the ground assembly (100) can respond to the ping signal of the ground assembly (100). Through this process, the ground assembly (100) detects the vehicle assembly (200), and information such as type information of the ground assembly (100), type information of the vehicle assembly (200), type information of the electric vehicle (10) in which the vehicle assembly (200) is mounted, information on the amount of power required by the electric vehicle (10), and information on the amount of power that the ground assembly (100) can provide can be exchanged between the ground assembly (100) and the vehicle assembly (200).

[0163] Next, the ground assembly (100) transmits status information to the wireless charging control device (S2510). Here, the status information includes at least one of the temperature, temperature change rate, impedance, current, voltage, power, and coupling coefficient of the ground assembly (100). For this purpose, the ground assembly (100) may further include a sensor unit (not shown) for detecting the temperature of the ground assembly (100) or the surroundings of the ground assembly (100). Alternatively, the ground assembly (100) may further include a timer (not shown). The impedance may refer to the impedance on the first control circuit (120) side. The current, voltage, and power may be the current, voltage, and power on the transmitting coil (110) side. The coupling coefficient may be the coupling coefficient between the transmitting coil (110) and the receiving coil (210).

[0164] At this time, the state information may include state information before the ground assembly (100) is connected to the vehicle assembly (200) after the first power is applied to the ground assembly (100). That is, the state information may include state information before the power for wireless charging is transmitted to the vehicle assembly (200) after the first power is applied to the ground assembly (100). Here, the state before the power for wireless charging is transmitted to the vehicle assembly (200) after the first power is applied to the ground assembly (100) may be referred to as a no-load state or a prepower state.

[0165] Next, the wireless charging control device detects an abnormal condition based on the status information received from the ground assembly (100) (S2520). The abnormal condition may refer to a state in which a foreign object (FO) or a living object (LO) exists in the ground assembly (100). If a foreign object exists in the ground assembly (100), not only will the efficiency of wireless power transmission decrease, but there is also a risk of accidents such as fire or harm to living things occurring.

[0166] To this end, the wireless charging control device can compare the status information received from the ground assembly (100) with the normal status information. Here, the normal status information may include information when the ground assembly (100) is in a normal state, for example, information when there is no foreign matter or LO present. The normal status information may be stored in advance in the wireless charging control device or received from a surrounding ground assembly (100). The normal status information may include at least one of temperature, temperature change rate, impedance, current, voltage, power, and coupling coefficient when the ground assembly (100) is in a normal state.

[0167] For example, if a foreign substance such as metal that is affected by a magnetic field exists in the ground assembly (100) or around the ground assembly (100), the temperature of the ground assembly (100) or around the ground assembly (100) may become excessively high, or the temperature change rate of the ground assembly (100) or around the ground assembly (100) may become excessively fast. Alternatively, if a foreign substance such as metal exists in the ground assembly (100) or around the ground assembly (100), power may move from the ground assembly (100) to the foreign substance.

[0168] Accordingly, if the temperature received from the ground assembly (100) is outside a predetermined temperature range, or the temperature change rate received from the ground assembly (100) is outside a predetermined temperature change rate range, or the impedance received from the ground assembly (100) is outside a predetermined impedance range, or at least one of the current, voltage, and power received from the ground assembly (100) is outside a predetermined current, voltage, and power range, or the coupling coefficient received from the ground assembly (100) is outside a predetermined coupling coefficient range, it can be determined that the ground assembly (100) is in an abnormal state.

[0169] If no abnormal condition of the ground assembly (100) is detected, the wireless charging control device transmits a control signal to the ground assembly (100) to perform wireless charging (S2530). That is, a second power higher than the first power is applied to the ground assembly (100). Accordingly, power is wirelessly transmitted from the transmitting coil (110) of the ground assembly (100) to the receiving coil (210) of the vehicle assembly (200).

[0170] When an abnormal state of the ground assembly (100) is detected, the wireless charging control device derates or shuts down the ground assembly (100) (S2540). Here, the power applied to the transmission coil (110) of the ground assembly (100) may be lowered than the first power due to the derating. Alternatively, the power may not be applied to the transmission coil (110) of the ground assembly (100) due to the shutdown.

[0171] After a predetermined period of time has elapsed after derating or shutdown, steps S2500 to S2520 may be retried. If the abnormal condition, such as the presence of foreign matter in the ground assembly (100), is eliminated, step S2530 may be performed. Conversely, if the abnormal condition is still not eliminated, the wireless charging control device may determine that repair is required and notify a management server (not shown) of this. Furthermore, when derating or shutdown is performed, the vehicle or user may be notified of this and be guided to choose to stop charging or move.

[0172] Figure 19 is a flowchart illustrating a wireless charging control method of a wireless charging system according to another embodiment of the present invention. For convenience of explanation, duplicate descriptions of the same content as described with reference to Figure 18 will be omitted.

[0173] Referring to FIG. 19, the ground assembly (100) wirelessly transmits power to the vehicle assembly (200) (S2600). To this end, while the first power is applied to the ground assembly (100), the ground assembly (100) and the vehicle assembly (200) are connected, and after the connection is established, the ground assembly (100) supplies a second power higher than the first power to the vehicle assembly (200).

[0174] In addition, the ground assembly (100) transmits status information to the wireless charging control device (S2610). Here, the status information includes at least one of the temperature, temperature change rate, impedance, current, voltage, power, and coupling coefficient of the ground assembly (100). Here, the status information may be status information when the ground assembly (100) supplies a second power higher than the first power to the vehicle assembly (200).

[0175] Next, the wireless charging control device detects an abnormal condition based on the condition information received from the ground assembly (100) (S2620). The abnormal condition may mean that a foreign object (FO) exists in the ground assembly (100).

[0176] If no abnormal condition of the ground assembly (100) is detected, the wireless charging control device transmits a control signal to the ground assembly (100) to continue wireless charging (S2630). Accordingly, power is wirelessly transmitted from the transmitting coil (110) of the ground assembly (100) to the receiving coil (210) of the vehicle assembly (200).

[0177] When an abnormal state of the ground assembly (100) is detected, the wireless charging control device derates or shuts down the ground assembly (100) (S2640). Here, the power applied to the transmission coil (110) of the ground assembly (100) may be lowered than the second power due to the derating. Alternatively, the power may not be applied to the transmission coil (110) of the ground assembly (100) due to the shutdown.

[0178] After a predetermined period of time has elapsed after derating or shutdown, steps S2610 to S2620 may be retried. If the abnormal condition, such as the presence of foreign matter in the ground assembly (100), is eliminated, step S2630 may be performed. Conversely, if the abnormal condition is still not eliminated, the wireless charging control device may determine that repair is required and notify a management server (not shown) of this. Furthermore, when derating or shutdown is performed, the vehicle or user may be notified of this and be guided to choose to stop charging or move.

[0179] Figure 20 is a flowchart illustrating a wireless charging control method of a wireless charging system according to another embodiment of the present invention. For convenience of explanation, duplicate descriptions of the same content as described with reference to Figure 18 will be omitted.

[0180] Referring to FIG. 20, the ground assembly (100) and the vehicle assembly (200) perform signal exchange for connection establishment (S2700).

[0181] Next, the ground assembly (100) transmits status information to the wireless charging control device (S2710). Here, the status information includes at least one of the temperature, temperature change rate, impedance, current, voltage, power, and coupling coefficient of the ground assembly (100).

[0182] In addition, the vehicle assembly (200) transmits vehicle information to the wireless charging control device (S2720). Here, the vehicle information may include at least one of identification information, current, voltage, and power of the vehicle assembly (200). Here, the current, voltage, and power of the vehicle assembly (200) may be current, voltage, and power on the receiving coil (210) side.

[0183] Next, the wireless charging control device detects an abnormal condition based on the status information received from the ground assembly (100) and the vehicle information received from the vehicle assembly (200) (S2730). The abnormal condition may mean a condition in which a foreign object (FO) exists in the ground assembly (100).

[0184] If no abnormal state of the ground assembly (100) is detected, the wireless charging control device transmits a control signal to the ground assembly (100) to perform wireless charging (S2740). That is, a second power higher than the first power is applied to the ground assembly (100). Accordingly, power is wirelessly transmitted from the transmitting coil (110) of the ground assembly (100) to the receiving coil (210) of the vehicle assembly (200).

[0185] When an abnormal state of the ground assembly (100) is detected, the wireless charging control device derates or shuts down the ground assembly (100) (S2750). Here, the power applied to the transmission coil (110) of the ground assembly (100) may be lowered than the first power due to the derating. Alternatively, the power may not be applied to the transmission coil (110) of the ground assembly (100) due to the shutdown.

[0186] After a predetermined period of time has elapsed after derating or shutdown, steps S2700 to S2730 may be retried. If the abnormal condition, for example, the presence of foreign matter in the ground assembly (100), is eliminated, step S2740 may be performed. Conversely, if the abnormal condition is still not eliminated, the wireless charging control device may determine that repair is required and notify a management server (not shown) of this. In addition, when derating or shutdown is performed, the vehicle or user may be notified of this and be guided to choose to stop charging or move.

[0187] Meanwhile, the wireless charging system and its wireless charging control method according to an embodiment of the present invention can also be applied when a plurality of ground assemblies are sequentially arranged.

[0188] FIG. 21 is a drawing showing an environment in which a plurality of ground assemblies are sequentially arranged on a driving path of an electric vehicle, and FIG. 22 is a flowchart of a wireless charging control method of a wireless charging system according to an embodiment of the present invention in the environment of FIG. 21.

[0189] Referring to Fig. 21, within the coverage area of ​​a wireless charging control device, a plurality of ground assemblies (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n) are sequentially arranged on a driving path of an electric vehicle (10). Here, the presence of a foreign substance in one (100-5) of the plurality of ground assemblies will be described as an example.

[0190] Referring to FIG. 22, a plurality of sequentially arranged ground assemblies (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n) transmit their respective status information to the wireless charging control device (S2900). Here, the status information includes at least one of temperature, temperature change rate, impedance, current, voltage, power, and coupling coefficient of each ground assembly (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n).

[0191] The wireless charging control device detects an abnormal state of each ground assembly using the status information received from each of the plurality of ground assemblies (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n) (S2910).

[0192] To this end, the wireless charging control device can compare each state information received from a plurality of ground assemblies (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n) with normal state information. Here, the normal state information can include at least one of temperature, temperature change rate, impedance, current, voltage, power, and coupling coefficient when no foreign matter exists on the ground assembly (100) in a no-load state.

[0193] For example, if the temperature received from a plurality of ground assemblies (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n) is outside a predetermined temperature range, or the temperature change rate is outside a predetermined temperature change rate range, or the impedance is outside a predetermined impedance range, or at least one of the current, voltage, and power is outside at least one of the predetermined current, voltage, and power ranges, or the coupling coefficient is outside a predetermined coupling coefficient range, it can be determined that the corresponding ground assembly is in an abnormal state.

[0194] The wireless charging control device transmits a control signal to perform wireless charging to a ground assembly in which an abnormal state is not detected among a plurality of ground assemblies (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n) (S2920), and derates or shuts down a ground assembly in which an abnormal state is detected (S2930).

[0195] Meanwhile, when an electric vehicle (10) is driving on a ground assembly (100-1) in the environment of FIG. 21, the vehicle assembly (200) mounted on the electric vehicle (10) transmits vehicle information to a wireless charging control device. The wireless charging control device can transmit the vehicle information and a control signal for wireless charging received from the vehicle assembly (200) to ground assemblies (100-2, 100-3, 100-4, 100-5) through which the electric vehicle (10) is scheduled to pass. Accordingly, the ground assemblies (100-2, 100-3, 100-4, 100-5) can prepare in advance to wirelessly transmit power to the vehicle assembly (200).

[0196] However, if the wireless charging control device detects an abnormal state of the ground assembly (100-5), the wireless charging control device may not transmit the vehicle information and the control signal for wireless charging received from the vehicle assembly (200) to the ground assembly (100-5). Accordingly, power consumption and temperature increase due to unnecessary preparation of the ground assembly (100-5) can be prevented.

[0197] Meanwhile, according to an embodiment of the present invention, the wireless charging control device may determine a ground assembly among a plurality of ground assemblies (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n) that has a different pattern of transmitting status information from the surrounding ground assemblies as a ground assembly in an abnormal state.

[0198] FIG. 23(a) is an example of a case where status information is received from a plurality of sequentially arranged ground assemblies and no abnormal state is detected from any of the ground assemblies, and FIGS. 23(b) to 23(e) are examples of a case where an abnormal state of the ground assembly (100-5) is detected.

[0199] Referring to Fig. 23(a), when status information is received sequentially in time order from a plurality of sequentially arranged ground assemblies, the wireless charging control device can determine that there is no abnormality on the path of the electric vehicle (10).

[0200] In contrast, referring to FIGS. 23(b) to 23(c), when status information is received sequentially in time order from a plurality of sequentially arranged ground assemblies, and status information is continuously received from a specific ground assembly (100-5), the wireless charging control device can determine that an abnormal state has occurred in the corresponding ground assembly (100-5).

[0201] Alternatively, referring to FIGS. 23(d) to 23(e), if status information is received sequentially in time order from a plurality of sequentially arranged ground assemblies, but status information is not continuously received from a specific ground assembly (100-5), the wireless charging control device may determine that an abnormal state has occurred in the corresponding ground assembly (100-5).

[0202] For example, if an accident occurs in the ground assembly (100-5) and the electric vehicle (10) does not pass through the ground assembly (100-5) but instead bypasses it, the ground assembly (100-5) does not transmit status information to the wireless charging control device.

[0203] According to an embodiment of the present invention, a wireless charging control device can determine a ground assembly among a plurality of ground assemblies (100-1, 100-2, 100-3, 100-4, 100-5, ..., 100-n) whose temperature information is different from that of surrounding ground assemblies as an abnormal ground assembly.

[0204] FIGS. 24(a) and 24(b) illustrate examples in which a wireless charging control device receives temperature information from the first to fourth ground assemblies (GA1, GA2, GA3, and GA4) when the first to fourth ground assemblies (GA1, GA2, GA3, and GA4) are arranged. The first to fourth ground assemblies may not be arranged sequentially, and may be a plurality of ground assemblies arranged within a parking space.

[0205] Referring to FIG. 24(a), when the wireless charging control device receives status information including a “first temperature” from the first to fourth ground assemblies (GA1, GA2, GA3, GA4), if the “first temperature” is room temperature, the wireless charging control device can determine that the first to fourth ground assemblies (GA1, GA2, GA3, GA4) are in a normal state. If some of the first to fourth ground assemblies (GA1, GA2, GA3, GA4) transmit status information including a “second temperature” that is a higher temperature than the surrounding ground assemblies (GA1, GA3) to the wireless charging control device, the wireless charging control device determines whether the “second temperature” is within a temperature range of a charging state, and if it is within the temperature range of a charging state, the wireless charging control device continues the procedure.

[0206] Referring to FIG. 24(b), when some of the first to fourth ground assemblies (GA1, GA2, GA3, GA4) transmit status information including a “second temperature” that is higher than the surrounding ground assemblies (GA1, GA3) to the wireless charging control device, the wireless charging control device determines whether the “second temperature” is within the temperature range of the charging state, and if so, continues the procedure. If some of the ground assemblies (GA2) transmit status information including a “third temperature” that is higher than the “second temperature” that is the temperature of the charging state to the wireless charging control device, the wireless charging control device may determine that an abnormality has occurred in the ground assembly (GA2).

[0207] According to an embodiment of the present invention, the plurality of ground assemblies (GA1, GA2, GA3, GA4) may transmit a temperature range rather than a specific temperature to the wireless charging control device. The wireless charging control device stores in advance a temperature range of an uncharged state, a temperature range of a charged state, and a temperature range of an abnormal state, and can determine whether the corresponding ground assembly is uncharged, charged, or in an abnormal state based on the temperature range received from the plurality of ground assemblies (GA1, GA2, GA3, GA4).

[0208] Wireless charging control according to an embodiment of the present invention can be applied in a no-load state or in a charging state.

[0209] Fig. 25 shows an example in which a wireless charging control method according to an embodiment of the present invention is applied.

[0210] As shown in Fig. 25(a), when a first vehicle (10-1) passes through a first GA in which a foreign substance exists and a second vehicle (10-2) follows, referring to Fig. 25(b), the wireless charging control device receives first vehicle charging information according to charging of the first vehicle (10-1) from the first GA (S2200). Here, the first GA can charge the first vehicle (10-1) with the second power. The first vehicle charging information may include impedance measured in the first GA during charging of the first vehicle (10-1), voltage or current of the first GA, and voltage, current, efficiency, or power of the first VA mounted on the first vehicle (10-1).

[0211] Next, when the second vehicle (10-2) passes through the first GA, the wireless charging control device performs charging of the second vehicle (10-2) based on the first vehicle charging information acquired in step S2200 (S2210). For example, if the first GA is determined to be in an abnormal state based on the first vehicle charging information, the first GA performs derating and can charge the second vehicle (10-2) with a first power lower than the second power.

[0212] Fig. 26 shows another example to which a wireless charging control method according to an embodiment of the present invention is applied.

[0213] As shown in Fig. 26(a), when a first vehicle (10-1) passes through a first GA in which a foreign substance exists and a second vehicle (10-2) follows, referring to Fig. 26(b), the wireless charging control device receives first vehicle charging information according to charging of the first vehicle (10-1) from the first GA (S2300). Here, the first GA can charge the first vehicle (10-1) with the second power. The first vehicle charging information may include impedance measured by the first GA during charging of the first vehicle (10-1), voltage or current of the first GA, and voltage, current, efficiency, or power of the first VA mounted on the first vehicle (10-1).

[0214] Next, the wireless charging control device acquires operation information of the first GA based on the first vehicle charging information (S2310). Here, the operation information of the first GA refers to information indicating whether the first GA is operating in an abnormal state or a normal state. For example, if the impedance measured in the first GA is out of the normal range, or the voltage or current of the first GA is out of the normal range, or the voltage, current, efficiency, or power of the first VA is out of the normal range, the first GA may be determined to be operating in an abnormal state. If the impedance measured in the first GA is within the normal range, or the voltage or current of the first GA is within the normal range, or the voltage, current, efficiency, or power of the first VA is within the normal range, the first GA may be determined to be operating in a normal state.

[0215] Next, when the second vehicle (10-2) passes through the first GA, charging of the second vehicle (10-2) is performed (S2320) based on the operating information of the first GA acquired in step S2310. For example, if the first GA is operating in an abnormal state, the first GA performs derating and can charge the second vehicle (10-2) with a first power lower than the second power.

[0216] Here, before performing step S2320, the first GA further transmits second vehicle charging information according to the charging of the second vehicle (10-2) to the wireless charging control device, and in step S2320, the wireless charging control device may further use the second vehicle charging information to perform charging of the second vehicle (10-2).

[0217] Fig. 27 shows another example in which a wireless charging control method according to an embodiment of the present invention is applied.

[0218] As illustrated in Fig. 27(a), when a first vehicle (10-1) passes through a first GA containing foreign matter and a second vehicle (10-2) follows, referring to Fig. 27(b), the same description as steps S2300 to S2320 may be applied to steps S2400 to S2420. Although not illustrated, the first GA may further transmit second vehicle charging information according to the charging of the second vehicle (10-2) to the wireless charging control device.

[0219] When a third vehicle (10-3) following a second vehicle (10-2) passes through the first GA, charging of the third vehicle (not shown) is performed based on the second vehicle charging information (S2430). For example, the wireless charging control device obtains operation information of the first GA based on the second vehicle charging information, and if the operation information of the first GA indicates a normal state, the first GA can be increased to the second power to charge the third vehicle.

[0220] Fig. 28 shows another example in which a wireless charging control method according to an embodiment of the present invention is applied.

[0221] As shown in Fig. 28(a), when a first vehicle (10-1) passes through a first GA in which a foreign substance exists and a second vehicle (10-2) follows, referring to Fig. 28(b), the wireless charging control device receives first charging information according to charging of the first vehicle (10-1) from the first GA (S1500). Here, the first GA can charge the first vehicle (10-1) with the second power. The first charging information may include impedance measured by the first GA during charging of the first vehicle (10-1), voltage or current of the first GA, and voltage, current, efficiency, or power of the first VA mounted on the first vehicle (10-1).

[0222] Thereafter, the wireless charging control device receives second charging information according to the charging of the first vehicle (10-1) from a second GA, which is another GA on the path through which the first vehicle (10-1) passes (S1510). Here, the second GA can charge the first vehicle (10-1) with the second power. The second charging information may include impedance measured by the second GA during charging of the first vehicle (10-1), voltage or current of the second GA, and voltage, current, efficiency, or power of the first VA mounted on the first vehicle (10-1).

[0223] Next, the wireless charging control device acquires operating information of the first GA based on the first charging information transmitted by the first GA and the second charging information transmitted by the second GA (S1520). Here, the operating information of the first GA refers to information indicating whether the first GA is operating in an abnormal state or in a normal state. For example, the wireless charging control device can detect an abnormal state of the first GA by comparing the first charging information transmitted by the first GA and the second charging information transmitted by the second GA.

[0224] Next, when the second vehicle (10-2) passes through the first GA, charging of the second vehicle (10-2) is performed (S1530) based on the operating information of the first GA acquired in step S1520. For example, if the first GA is operating in an abnormal state, the first GA performs derating and can charge the second vehicle (10-2) with a first power lower than the second power.

[0225] Fig. 29 shows another example in which a wireless charging control method according to an embodiment of the present invention is applied.

[0226] As shown in Fig. 29(a), when a first vehicle (10-1) passes through a first GA in advance and a second vehicle (10-2) follows, referring to Fig. 29(b), the wireless charging control device receives first charging information according to charging of the first vehicle (10-1) from the first GA (S1600). Here, the first GA can charge the first vehicle (10-1) with the second power. The first charging information may include impedance measured by the first GA during charging of the first vehicle (10-1), voltage or current of the first GA, and voltage, current, efficiency, or power of the first VA mounted on the first vehicle (10-1).

[0227] Thereafter, the wireless charging control device receives second charging information according to the charging of the second vehicle (10-2) following the first vehicle (10-1) from the first GA (S1610). Here, the first GA can charge the second vehicle (10-2) with the second power. The second charging information may include the impedance measured by the first GA during charging of the second vehicle (10-2), the voltage or current of the first GA, and the voltage, current, efficiency, or power of the second VA mounted on the second vehicle (10-2).

[0228] Next, the wireless charging control device performs foreign substance detection on the second vehicle (10-2) based on the first charging information and the second charging information transmitted by the first GA (S1620). For example, when the first charging information indicates that the first GA is operating normally, but the second charging information indicates that the first GA is operating abnormally, the wireless charging control device can determine that no foreign substance exists on the first GA, but that a foreign substance is attached to the second vehicle (10-2).

[0229] Thereafter, when the second vehicle (10-2) passes through the second GA, charging of the second vehicle (10-2) is performed (S1630) based on the result of the foreign substance detection of the second vehicle (10-2) performed in step S1520. That is, the second GA performs derating and can charge the second vehicle (10-2) with the first power that is lower than the second power.

[0230] Although the present invention has been described above with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the claims below.

Claims

1. A wireless charging control method of a wireless charging control device for a running electric vehicle, The first control unit detects the entry of the electric vehicle into the first area, The first control unit comprises a step of obtaining vehicle information of the electric vehicle; The first control unit transmits vehicle information of the electric vehicle to the second control unit, The first control unit controls the power supply of a plurality of ground assemblies arranged in the first area, and The second control unit includes a step of controlling power supply of a plurality of ground assemblies arranged in the second area, The step of controlling the power supply by the first control unit and the step of controlling the power supply by the second control unit each include a first input voltage section, a second input voltage section, and a third input voltage section that are sequentially performed, In the first input voltage section, the input voltage increases over time, and in the third input voltage section, the input voltage decreases over time. A wireless charging control method wherein the first input voltage section, the second input voltage section, and the third input voltage section of the second control unit follow the first input voltage section, the second input voltage section, and the third input voltage section of the first control unit.

2. In paragraph 1, A wireless charging control method in which a portion of the second input voltage section of the first control unit overlaps with a portion of the first input voltage section of the second control unit.

3. In paragraph 2, A wireless charging control method wherein at least one of the starting point of the first input voltage section of the second control unit, the starting point of the second input voltage section of the second control unit, the maintenance period of the second input voltage section of the second control unit, and the starting point of the third input voltage section of the second control unit is set based on the vehicle information.

4. In paragraph 2, A wireless charging control method in which the start point of the first input voltage section of the second control unit overlaps with the first input voltage section of the first control unit or the second input voltage section of the first control unit.

5. In paragraph 4, A wireless charging control method wherein the start point of the second input voltage section of the second control unit overlaps with the second input voltage section of the first control unit.

6. In paragraph 2, A wireless charging control method wherein a first input voltage in a second input voltage section of the first control unit is greater than a second input voltage in a first input voltage section of the second control unit.

7. In paragraph 1, A wireless charging control method wherein the vehicle information includes speed information of the electric vehicle.

8. In paragraph 1, The first region and the second region include overlapping sections that overlap each other, A wireless charging control method in which, in the above-mentioned transmitting step, the first control unit transmits vehicle information of the electric vehicle to the second control unit before the electric vehicle enters the overlapping section.

9. In paragraph 8, At least one ground assembly is placed within the above overlapping section, A wireless charging control method wherein at least one of the ground assemblies is controlled by the first control unit or the second control unit.

10. In paragraph 9, A wireless charging control method in which the at least one ground assembly is controlled by the first control unit when the switch connected between the at least one ground assembly, the first control unit, and the second control unit is in a first state, and the at least one ground assembly is controlled by the second control unit when the switch is in a second state.

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