Wireless charging method for electric vehicle and apparatus therefor

Abstract

A method for receiving power by a driving vehicle according to an embodiment of the present invention may include the steps of: identifying a state of a battery in a vehicle; identifying whether the identified state of the battery is an overcharged state; transmitting information related to the identified state of the battery to a power supply system when the identified state of the battery is the overcharged state; determining whether the battery in the vehicle is in a chargeable state; transmitting information on the amount of power being used by the vehicle to the power supply system when it is determined that the battery is in the chargeable state; and receiving power supplied from the power supply system on the basis of the transmitted information on the amount of power being used by the vehicle, wherein the amount of power supplied from the power supply system may not be greater than the amount of power being used by the vehicle.

Description

Wireless charging method for electric vehicles and device therefor

[0001] The present invention relates to a wireless charging method for an electric vehicle and a device therefor, and more specifically, to a wireless charging method that takes into account overcharging of an electric vehicle and a device therefor.

[0002] A power supply system (or wireless charging system) for an electric vehicle includes a power supply unit, a grounding assembly, and a vehicle assembly. Electric vehicles can be charged by receiving power while parked or stopped, and can also receive power while in motion. When charging while parked or stopped, a static wireless power transfer method can be used, while when charging while in motion, a dynamic wireless power transfer method can be used.

[0003] In the case of static wireless power transfer, a ground assembly is placed on the parking lot floor, and the vehicle assembly placed on the electric vehicle allows the battery in the electric vehicle to be charged while parked or stopped. In the static wireless power transfer method, the wireless charging system typically controls the wireless charging of one electric vehicle at a time, allowing the electric vehicle to be charged for a relatively long period of time.

[0004] In contrast, in the case of dynamic wireless power transfer, the ground assembly is placed on the road, and the vehicle assembly placed on the electric vehicle allows charging during driving. In dynamic wireless power transfer, the wireless charging system may need to control the wireless charging of multiple electric vehicles simultaneously, and may need to control the charging of each vehicle for a relatively short period of time while the vehicle is in motion. Therefore, it may be difficult for the wireless charging system to control each individual electric vehicle.

[0005] That is, in cases where the charging of electric vehicles can be individually controlled, such as in a static wireless power transfer method, the wireless charging system can consider overcharging of the battery within the electric vehicle. However, in cases where multiple vehicles must be controlled simultaneously, such as in a dynamic wireless power transfer method, the wireless charging system may have difficulty considering overcharging of the battery within the electric vehicle.

[0006] The technical problem to be solved by the present invention is to provide a wireless charging method and a device therefor that can charge an electric vehicle while driving without overcharging.

[0007] The technical problem to be achieved by the present invention is to provide a wireless charging method and a device therefor that can safely supply power to an electric vehicle while it is driving.

[0008] The technical problem to be achieved by the present invention is to provide a method and a device therefor that can supply power only to the amount used when an electric vehicle is already fully charged.

[0009] In addition, the technical problems to be solved by the present invention are not limited to the technical problems described above, and other technical problems may exist.

[0010] A method for supplying power to a vehicle while driving according to an embodiment of the present invention may include the steps of: checking a state of a battery within the vehicle; checking whether the checked state of the battery is in an overcharged state; if the checked state of the battery is in an overcharged state, transmitting information related to the checked state of the battery to a power supply system; determining whether the battery within the vehicle is in a chargeable state; if the battery is determined to be in a chargeable state, transmitting information on the amount of power being used by the vehicle to the power supply system; and receiving power from the power supply system based on the transmitted information on the amount of power being used by the vehicle, wherein the amount of power supplied from the power supply system may not be greater than the amount of power being used by the vehicle.

[0011] In a method for supplying power to a vehicle while driving according to an embodiment of the present invention, the step of checking whether the confirmed battery state is an overcharged state may be a step of checking whether the charge amount of the battery is greater than the charge amount of a battery previously designated as overcharged.

[0012] A method for supplying power to a vehicle while driving according to an embodiment of the present invention further includes the steps of: if it is determined that the battery is not in a chargeable state, checking the amount of power currently being used by the vehicle; re-determining whether the battery is in a chargeable state; if it is re-determined that the battery is in a chargeable state, transmitting information about the amount of power currently being used by the vehicle and the amount of power used by the vehicle in a state where the battery is not chargeable to the power supply system; and receiving power from the power supply system based on the information about the amount of power transmitted, wherein the amount of power supplied from the power supply system may not be greater than the sum of the amount of power currently being used by the vehicle and the amount of power used by the vehicle in a state where the battery is not chargeable.

[0013] A method for supplying power to a vehicle while driving according to an embodiment of the present invention may further include a step of checking whether a state of a battery in the vehicle is overcharged based on the amount of power supplied from the power supply system, a step of transmitting information on the amount of power being used by the vehicle to the power supply system if the checked battery state is overcharged, and a step of supplying power from the power supply system based on the transmitted information on the amount of power being used by the vehicle.

[0014] In a method for supplying power to a vehicle while driving according to an embodiment of the present invention, a battery in the vehicle can receive power in a constant current manner from the power supply system.

[0015] In a method for supplying power to a vehicle while driving according to an embodiment of the present invention, the step of determining whether a battery in the vehicle is in a chargeable state may be a step of determining whether power can be physically supplied from the power supply system regardless of the remaining charge level of the battery.

[0016] In a method for supplying power to a vehicle while driving according to an embodiment of the present invention, information about the amount of power being used by the vehicle may include the amount of current consumed by the vehicle.

[0017] A method for supplying power to a vehicle while driving according to an embodiment of the present invention includes the steps of: checking a state of a battery within the vehicle; transmitting information about the checked state of the battery to a power supply system; the information about the state of the battery includes information about whether the battery is overcharged; determining whether the battery within the vehicle is in a chargeable state; transmitting information about the amount of power being used by the vehicle to the power supply system when the battery is determined to be in a chargeable state; and receiving power from the power supply system based on the transmitted information about the amount of power being used by the vehicle, wherein the amount of power supplied from the power supply system may not be greater than the amount of power being used by the vehicle.

[0018] A device for wireless charging of an electric vehicle according to an embodiment of the present invention includes a coil, a battery, a communication unit, and a control unit configured to check a state of the battery within a vehicle, check whether the checked state of the battery is an overcharged state, and if the checked state of the battery is an overcharged state, transmit information related to the checked state of the battery to a power supply system using the communication unit, determine whether the battery within the vehicle is in a chargeable state, and if the battery is determined to be in a chargeable state, transmit information on the amount of power being used by the vehicle to the power supply system using the communication unit, and control to supply power from the power supply system through the coil based on the transmitted information on the amount of power being used by the vehicle, wherein the amount of power supplied from the power supply system may not be greater than the amount of power being used by the vehicle.

[0019] In a device for wireless charging of an electric vehicle according to an embodiment of the present invention, the control unit can check whether the charge amount of the battery is greater than a charge amount of the battery previously designated as overcharge.

[0020] In a device for wireless charging of an electric vehicle according to an embodiment of the present invention, if the control unit determines that the battery is not in a chargeable state, the control unit checks the amount of power currently being used by the vehicle, re-determines whether the battery is in a chargeable state, and if the battery is re-determined to be chargeable, transmits information about the amount of power currently being used by the vehicle and the amount of power used by the vehicle in a state where the battery is not chargeable to the power supply system using the communication unit, and receives power from the power supply system through the coil based on the information about the amount of power transmitted.

[0021] In a device for wireless charging of an electric vehicle according to an embodiment of the present invention, the control unit determines whether the state of a battery in the vehicle is overcharged based on the amount of power supplied from the power supply system, and if the determined battery state is overcharged, transmits information on the amount of power being used by the vehicle to the power supply system using the communication unit, and receives power from the power supply system through the coil based on the transmitted information on the amount of power being used by the vehicle.

[0022] In a device for wireless charging of an electric vehicle according to an embodiment of the present invention, a battery in the vehicle can receive power in a constant current manner from the power supply system.

[0023] In a device for wireless charging of an electric vehicle according to an embodiment of the present invention, the control unit can determine whether power can be physically supplied from the power supply system regardless of the remaining charge level of the battery.

[0024] In a device for wireless charging of an electric vehicle according to an embodiment of the present invention, information on the amount of power being used by the vehicle may include the amount of current consumed by the vehicle.

[0025] According to the present invention, an electric vehicle can safely receive power even while driving on a road.

[0026] According to the present invention, a user can request power supply from a power supply system without considering overcharging of the electric vehicle.

[0027] According to the present invention, an electric vehicle can recharge only the amount of battery used even when the battery is charged, thereby maintaining a constant amount of battery charge.

[0028] According to the present invention, a power supply system can supply power to a plurality of electric vehicles without changing the charging method.

[0029] In addition, the effects that can be obtained from the present invention are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0030] FIG. 1 is a drawing showing an example of a power supply system supplying power to a running electric vehicle according to one embodiment of the present invention.

[0031] FIG. 2 is a diagram showing the internal configuration of a power supply system and an electric vehicle that transmits power according to one embodiment of the present invention.

[0032] FIG. 3a and FIG. 3b are diagrams showing a power source supplied to a motor depending on whether a running electric vehicle is charged according to one embodiment of the present invention.

[0033] FIG. 4 is a flowchart illustrating a process in which an electric vehicle receives power from a power supply system while driving according to one embodiment of the present invention.

[0034] FIG. 5 is a flowchart for supplying power to a running electric vehicle according to one embodiment of the present invention.

[0035] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] Additionally, in describing components of embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] FIG. 1 is a drawing showing an example of a power supply system supplying power to a running electric vehicle according to one embodiment of the present invention.

[0045] Referring to FIG. 1, at least a portion of a power supply system may be installed on a road (101) to supply power to a running electric vehicle. The power supply system may include, but is not limited to, a coil (121), a DC / DC converter (123), a link capacitor (125), and an AC / DC converter (127), for example. The AC / DC converter (127) may receive power from a grid (129). The AC / DC converter (127) may convert AC power (or voltage, current) supplied from the grid (129) into DC power. The link capacitor (125) may serve as an intermediate buffer between input and output, and the DC / DC converter (123) may convert DC power (or voltage, current) into DC power. The DC / DC converter (123) can transmit the converted power to the coil (121), and the power transmitted to the coil (121) can generate power in the coil placed inside the electric vehicle, thereby charging the battery of the electric vehicle. In addition to the configuration illustrated in Fig. 1, the power supply system may include a communication unit (not illustrated), etc. The communication unit included in the power supply system can communicate with the electric vehicle and / or a server.

[0046] According to one embodiment, the coil (121) disposed on the road (101) and the coil disposed on the electric vehicle may transmit power when disposed within a certain area. In FIG. 1, the first electric vehicle (111) may be located between the coils (121) disposed on the road (101) and the coils (121) and may not be able to be charged, and the second electric vehicle (113) may be located on the coils (121) disposed on the road (101) and may be able to be charged. The spacing between the coils (121) disposed on the road may be constant, but is not limited thereto. In addition, the spacing between the coils (121) may vary depending on the location of the road or the type of road.

[0047] FIG. 2 is a diagram showing the internal configuration of a power supply system and an electric vehicle that transmits power according to one embodiment of the present invention.

[0048] Referring to FIG. 2, a power supply system (210) can receive power from a grid (201), and an electric vehicle (230) can receive power from the power supply system (210). The grid (201) is a term encompassing a power grid, power infrastructure, etc., and can refer to all components that supply power to the power supply system (210).

[0049] According to one embodiment, the power supply system (210) may include a supply equipment communication controller (SECC) (211), an inverter controller (213), an inverter (215), a DC / DC controller (217), a DC / DC converter (219), and a coil (221). The SECC (211) may be a component responsible for communication within the power supply system (210) and may be referred to as a communication unit. The SECC (211) may communicate with an electric vehicle (230) to transmit and receive necessary information. For example, the SECC (211) may receive a message requesting charging from the electric vehicle (230), and may also transmit information regarding power to be supplied to the electric vehicle (230). In addition, the SECC (211) may transmit the received information to the inverter controller (213). The inverter (215) can convert the power received from the grid (201) based on the control of the inverter controller (213). That is, the inverter (215) can convert the AC power received from the grid (201) into DC power and transmit it to the DC / DC converter (219). The DC / DC converter (219) can convert the DC power received into other DC power under the control of the DC / DC controller (217). The DC / DC converter (219) can transmit the converted power to the coil (221), and the power transmitted to the coil (221) can generate power for the coil (243) of the electric vehicle (230).

[0050] In Fig. 2, the inverter controller (213) and the DC / DC controller (217) of the power supply system (210) are described separately, but this can be implemented as one configuration, for example, a control unit, and the control unit can control each configuration within the power supply system (210) as a whole.

[0051] According to one embodiment, an electric vehicle (230) may include an electric vehicle communication controller (EVCC) (231), a motor (233), an inverter (235), an inverter controller (237), a battery (239), a battery management system (BMS) (241), a DC / DC controller (247), a DC / DC converter (245), and a coil (243). The EVCC (231) may be a component that performs communication with a power supply system (210) so that the electric vehicle (230) may be supplied with power, and may be referred to as a communication unit. Specifically, the EVCC (231) may perform communication with the SECC (211) of the power supply system (210), request necessary information, and transmit the requested information. The EVCC (231) may transmit the received information to the inverter controller (237). The inverter controller (237) can control the inverter (235) based on a request or control of the EVCC (231) and the battery management system (BMS) (241), and the inverter (235) can receive power from the battery (239) or the DC / DC converter (245) and transmit it to the motor (233). That is, the inverter (235) can convert the DC power received from the battery (239) or the DC / DC converter (245) into the AC power required for the motor (233). The battery management system (BMS) (241) is a system that manages the battery (239), can monitor the battery (239), and can control the inverter controller (237) and the DC / DC controller (247) to control the voltage / current output from the battery (239) and the voltage / current input to the battery (239), thereby managing the lifespan, performance, and safety of the battery (239). The DC / DC converter (245) can convert the power transmitted from the coil (243) into DC power under the control of the DC / DC controller (247), and the power transmitted from the coil (243) can be power generated by the coil (221) of the power supply system (210).

[0052] In FIG. 2, the inverter controller (237), battery management system (BMS) (241), and DC / DC controller (247) of the electric vehicle (230) are described separately, but these may be implemented as one configuration, for example, a control unit, and the control unit may control the overall configuration of the electric vehicle (230) described in the present disclosure.

[0053] FIG. 3a and FIG. 3b are diagrams showing a power source supplied to a motor depending on whether a running electric vehicle is charged according to one embodiment of the present invention.

[0054] Specifically, Fig. 3a shows the power supply while driving an electric vehicle that is not being charged, and Fig. 3b shows the power supply while driving an electric vehicle that is being charged.

[0055] Referring to FIG. 3A, the motor (303) of an electric vehicle that is not being charged can receive power from the battery (301). The electric vehicle can drive the motor (303) using the power charged in the battery (301).

[0056] Referring to FIG. 3B, a running electric vehicle can drive a motor (303) as well as charge a battery (301) when charging. The electric vehicle can receive power from an external source and supply power to the battery (301) and the motor (303) through an internal charging circuit (305). According to one embodiment, if the electric vehicle determines that the battery has sufficient remaining charge and is in an overcharge state, the electric vehicle can use the power received from the external source only to drive the motor (303).

[0057] FIG. 4 is a flowchart illustrating a process in which an electric vehicle receives power from a power supply system while driving according to one embodiment of the present invention.

[0058] Referring to Figure 4, if an electric vehicle determines that charging is possible while driving, the battery status can first be checked (S401). The battery status refers to a state related to battery charging, and may indicate at least one of the following: whether the battery is currently charging, the remaining battery capacity, the total number of battery charges, or whether the battery is overcharged.

[0059] The electric vehicle can determine whether the battery is overcharged (S403). For example, the electric vehicle can determine whether overcharge is occurring based on the checked battery status. The previously checked battery status may include information on overcharge, or the electric vehicle can directly determine whether the battery is overcharged. If the electric vehicle can determine the remaining battery capacity, it can compare the remaining battery capacity with a predetermined overcharge level to determine whether the battery is overcharged. In other words, if the remaining battery capacity included in the checked battery status is greater than the predetermined overcharge level, overcharge can be determined.

[0060] If the electric vehicle is determined not to be overcharged, charging can be performed in normal charging mode (S405). Normal charging mode may refer to a mode in which the electric vehicle's battery is charged without being overcharged.

[0061] If the electric vehicle determines that the battery is overcharged, it can notify the power supply system. Specifically, the electric vehicle can transmit information indicating that the battery is overcharged, or information regarding the battery's condition, including this information (S407).

[0062] Afterwards, the electric vehicle can determine whether it is capable of being charged (S409). The electric vehicle's charging status may change while it is in motion. For example, if the electric vehicle is being charged via a coil placed on the road, the electric vehicle may or may not be positioned over the coil while driving. If the electric vehicle is positioned over the coil while driving, the electric vehicle may be capable of being charged. However, if the electric vehicle is not positioned over the coil, the electric vehicle may not be capable of being charged.

[0063] If an electric vehicle is determined to be capable of charging, it can transmit information about its current power consumption to the power supply system (S411). The amount of power consumed by the electric vehicle may be, but is not limited to, the amount consumed by the motor. For example, the amount of power consumed by components other than the motor may also be included in the current amount of power consumed.

[0064] The power supply system can determine the power to be transmitted to the electric vehicle based on the information transmitted by the electric vehicle (S413). The power supply system can further refer to previously transmitted information on whether the electric vehicle is overcharged to determine the power to be transmitted to the electric vehicle. The power supply system can supply power to the electric vehicle in a constant current manner. That is, the power supply system can supply power to the electric vehicle in a manner that maintains a constant current.

[0065] The power supply system can transmit power based on the confirmed power (S415). The power supply system can transmit only the amount of power the electric vehicle is using. The power supply system can prevent the electric vehicle's battery from charging further by not transmitting more power than the electric vehicle has used. Overcharging an electric vehicle's battery can shorten its lifespan and increase the risk of fire. To prevent this, the power supply system can only supply the amount of power the electric vehicle's battery is using when overcharged.

[0066] If an electric vehicle is determined to be unchargeable, the current power consumption can be checked (S417). Since electric vehicles cannot be recharged, the motor can be powered by the stored power in the battery. The current power consumption can be determined by checking the degree of change in the remaining battery capacity.

[0067] The electric vehicle can determine whether it is rechargeable (S419). While the electric vehicle is in motion, the battery's chargeability may change. If the vehicle determines that it is not rechargeable, it can continue to check the current power consumption (S417).

[0068] However, when the electric vehicle becomes capable of being charged, it can transmit information about the amount of power currently being used and the amount of power confirmed to have been used to the power supply system (S421).

[0069] The power supply system can determine the amount of power to be transmitted to the electric vehicle based on the information transmitted by the electric vehicle (S423). The power supply system can determine the amount of power to be transmitted to the electric vehicle as the sum of the amount of power currently being used by the electric vehicle and the amount of power confirmed to have been used.

[0070] The power supply system can transmit power according to the amount of power to be transmitted confirmed in advance (S425).

[0071] FIG. 5 is a flowchart for supplying power to a running electric vehicle according to one embodiment of the present invention.

[0072] In one embodiment, an electric vehicle, i.e., a vehicle, may determine or confirm that charging is possible while driving by means of a sensor, a user input, or communication with a system connected to the vehicle when entering a road where charging is possible.

[0073] Referring to FIG. 5, the vehicle can check the battery status (S501). The battery status may include, for example, at least one of: whether the battery is currently charging, the remaining battery capacity, the number of times the battery has been charged, or whether the battery is overcharged. According to one embodiment, the vehicle may have a separate battery management system (BMS) that manages the battery, and the BMS can check the battery status.

[0074] The vehicle can determine whether or not the battery is overcharged based on the confirmed battery status (S503). For example, if the confirmed battery status directly includes whether or not the battery is overcharged, this can be determined directly. If the confirmed battery status does not include whether or not the battery is overcharged but does include the remaining battery capacity, the battery remaining capacity determined in advance as overcharge can be compared with the remaining battery capacity included in the confirmed battery status to determine whether or not the current battery is overcharged. In other words, if the remaining battery capacity included in the confirmed battery status is greater than the remaining battery capacity determined in advance as overcharge, overcharge can be determined.

[0075] If the vehicle determines that the battery is not overcharged, it can charge in normal charging mode through communication with the power supply system (S505). For example, normal charging mode can be a mode that charges the vehicle's battery without any special restrictions.

[0076] If the vehicle determines that the battery is overcharged, it can transmit related information to the power supply system (S507). For example, the vehicle may transmit information indicating that the battery is overcharged, or information regarding the battery's condition, including this information.

[0077] The vehicle can determine whether the battery is currently chargeable, even if it is overcharged (S509). While the vehicle is driving, its position on the road may change, allowing it to be charged or not. For example, if the vehicle is charging via a coil, the vehicle may determine that charging is possible if the coil within the vehicle is within a certain range of the coil installed on the road. Otherwise, the vehicle may determine that charging is not possible.

[0078] If the vehicle is determined to be capable of charging, it can transmit information about the amount of power it is currently using to the power supply system (S511). The amount of power currently being used by the vehicle may be the amount consumed by the vehicle's motor. Furthermore, this amount of power may include the amount consumed by other components of the vehicle in addition to the motor. The vehicle can verify the amount of power being used and transmit this information to the power supply system.

[0079] Thereafter, the vehicle can receive power from the power supply system based on the transmitted information (S513). The vehicle can receive power from the power supply system equivalent to the previously confirmed amount of power in use, thereby preventing the battery's remaining charge from increasing. Furthermore, the power supply system can supply power to the electric vehicle in a constant-current manner, preventing overcurrent from flowing through the vehicle.

[0080] If the vehicle is determined to be in a state where charging is not possible, the current amount of power being used can be checked (S515). In this case, the vehicle is not in a state where charging is possible, so it can use the power stored in the battery. In other words, the vehicle can check the amount of power consumed by the battery.

[0081] The vehicle can then determine whether it is currently in a charging state (S517). As previously explained, while the vehicle is in motion, its position may change, allowing it to transition to a charging state. If the vehicle is not in a charging state, it can continue to check the current amount of power being used.

[0082] When the vehicle is determined to be in a chargeable state, information on the amount of power currently being used and the amount of power confirmed to have been used can be transmitted to the power supply system (S519).

[0083] Thereafter, the vehicle can receive power from the power supply system based on the transmitted information (S521). The vehicle can receive power from the power supply system equal to the sum of the previously confirmed amount of power in use and the amount of power confirmed to have been used. This prevents the vehicle's battery from becoming overcharged.

[0084] Although the above description focuses on examples, these are merely examples and do not limit the present invention. Those skilled in the art will appreciate that various modifications and applications not exemplified above are possible without departing from the essential characteristics of the present invention. For example, each component specifically shown in the examples can be modified and implemented. In addition, differences related to such modifications and applications should be construed as being included within the scope of the present invention defined in the appended claims.

Claims

1. Step to check the battery status inside the vehicle; A step for checking whether the above-mentioned confirmed battery status is in an overcharge state; A step of transmitting information related to the confirmed battery status to a power supply system if the confirmed battery status is an overcharge status; A step of determining whether the battery in the vehicle is in a chargeable state; If the battery is determined to be in a chargeable state, a step of transmitting information about the amount of power being used by the vehicle to the power supply system; and A step of receiving power from the power supply system based on information about the amount of power being used by the vehicle transmitted above, A method for supplying power to a vehicle while it is running, wherein the amount of power supplied from the power supply system is no greater than the amount of power being used by the vehicle.

2. In the first paragraph, the step of checking whether the confirmed battery status is an overcharged state is as follows: A method for supplying power to a vehicle while it is running, the step being to check whether the charge of the battery is greater than the charge of the battery designated in advance as overcharge.

3. In paragraph 1, If it is determined that the above battery is not in a chargeable state, a step of checking the amount of power currently being used by the vehicle; A step of re-determining whether the above battery is in a chargeable state; When the battery is re-determined to be in a chargeable state, a step of transmitting information about the amount of power currently being used by the vehicle and the amount of power used by the vehicle while the battery is not chargeable to the power supply system; and Further comprising a step of receiving power from the power supply system based on information about the amount of power transmitted, A method for supplying power to a vehicle while it is running, wherein the amount of power supplied from the power supply system is no greater than the sum of the amount of power currently being used by the vehicle and the amount of power used by the vehicle while the battery is not capable of being charged.

4. In paragraph 3, A step of checking whether the state of the battery in the vehicle is overcharged by the amount of power supplied from the power supply system; If the above-determined battery status is an overcharged state, a step of transmitting information about the amount of power being used by the vehicle to the power supply system; and A method for a driving vehicle to receive power, further comprising the step of receiving power from the power supply system based on information about the amount of power being used by the vehicle that has transmitted the power.

5. In paragraph 1, A method for supplying power to a vehicle while it is running, wherein the battery in the vehicle receives power in a constant current manner from the power supply system.

6. In paragraph 1, the step of determining whether the battery in the vehicle is in a chargeable state is as follows: A method for supplying power to a vehicle while it is running, the method comprising: determining whether the vehicle is physically capable of receiving power from the power supply system regardless of the remaining charge level of the battery.

7. In paragraph 1, A method of supplying power to a vehicle while it is running, wherein information about the amount of power being used by said vehicle includes the amount of current consumed by said vehicle.

8. Step to check the battery status inside the vehicle; A step of transmitting information about the above-mentioned confirmed battery status to a power supply system; The information about the battery status includes information about whether the battery is overcharged, A step of determining whether the battery in the vehicle is in a chargeable state; If the battery is determined to be in a chargeable state, a step of transmitting information about the amount of power being used by the vehicle to the power supply system; and A step of receiving power from the power supply system based on information about the amount of power being used by the vehicle transmitted above, A method for supplying power to a vehicle while it is running, wherein the amount of power supplied from the power supply system is no greater than the amount of power being used by the vehicle.

9. Coil; battery; Department of Communications; and A control unit configured to check the state of the battery within the vehicle, check whether the checked battery state is an overcharged state, and if the checked battery state is an overcharged state, transmit information related to the checked battery state to a power supply system using the communication unit, determine whether the battery within the vehicle is in a chargeable state, and if the battery is determined to be in a chargeable state, transmit information on the amount of power being used by the vehicle to the power supply system using the communication unit, and control to supply power from the power supply system through the coil based on the transmitted information on the amount of power being used by the vehicle. A device for wireless charging of an electric vehicle, wherein the amount of power supplied from the above power supply system is no greater than the amount of power being used by the vehicle.

10. In paragraph 9, A device for wireless charging of an electric vehicle, wherein the control unit determines whether the charge amount of the battery is greater than a charge amount of the battery designated in advance as overcharge.

11. In paragraph 9, The above control unit, A device for wireless charging of an electric vehicle, wherein, if it is determined that the battery is not in a chargeable state, the amount of power currently being used by the vehicle is checked, whether the battery is in a chargeable state is re-determined, if the battery is re-determined to be chargeable, information about the amount of power currently being used by the vehicle and the amount of power used by the vehicle in a state where the battery is not chargeable is transmitted to the power supply system using the communication unit, and power is supplied from the power supply system through the coil based on the information about the amount of power transmitted.

12. In paragraph 11, The above control unit, A device for wireless charging of an electric vehicle, which determines whether a battery in the vehicle is overcharged based on the amount of power supplied from the power supply system, and if the determined battery state is overcharged, transmits information on the amount of power being used by the vehicle to the power supply system using the communication unit, and receives power from the power supply system through the coil based on the transmitted information on the amount of power being used by the vehicle.

13. In paragraph 9, A device for wireless charging of an electric vehicle, wherein the battery in the vehicle receives power in a constant current manner from the power supply system.

14. In paragraph 9, The above control unit, A device for wireless charging of an electric vehicle, which determines whether power can be physically supplied from the power supply system regardless of the remaining charge level of the battery.

15. In paragraph 9, A device for wireless charging of an electric vehicle, wherein information about the amount of power being used by the vehicle includes the amount of current consumed by the vehicle.

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