Wireless power supply system and operating method used in wireless power supply system

Abstract

To provide a wireless power supply system with low system construction cost and an operation method used in the wireless power supply system.SOLUTION: A wireless power supply system includes a charging device and a plurality of electrically-driven assist vehicles. The charging device includes a device converter and a device induction coil. Among the plurality of electrically-driven assist vehicles, a first electrically-driven assist vehicle provides wireless vehicle electrical energy to the device induction coil in a first operation mode. The charging device provides the wireless vehicle electrical energy to at least one electrically-driven assist vehicle other than the first electrically-driven assist vehicle in the first operation mode.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a power supply system and an operation method used for the power supply system, and particularly relates to a wireless power supply system and an operation method used for the wireless power supply system.

Background Art

[0002] FIG. 1 is a schematic diagram of a conventional wireless power supply system. The wireless power supply system 10 includes a plurality of charging devices 11_1 to 11_n and a plurality of electric assist vehicles 12_1 to 12_n. The electric assist vehicles 12_1 to 12_n may each be an electric assist transportation tool. The electric assist vehicles 12_1 to 12_n are each, for example, an electric assist wheelchair, an electric assist bicycle, an electric assist kick scooter, or an electric motorcycle. The wireless power supply system 10 wirelessly charges the electric assist vehicles 12_1 to 12_n one-to-one using the charging devices 11_1 to 11_n. For example, the charging device 11_1 wirelessly charges the electric assist vehicle 12_1 using the electrical energy of the power grid 13. The charging device 11_2 wirelessly charges the electric assist vehicle 12_2 using the electrical energy of the power grid 13, and so on.

[0003] Note that the wireless power supply system 10 must necessarily install the charging devices 11_1 to 11_n in order to supply power to the electric assist vehicles 12_1 to 12_n. Therefore, the wireless power supply system 10 has a high system construction cost. Therefore, how to provide a wireless power supply system that can suppress the system construction cost is one of the research topics of those skilled in the art.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention provides a wireless power supply system with a low system construction cost and an operation method used for the wireless power supply system.

Means for Solving the Problem

[0005] The wireless power supply system according to the present invention includes a charging device and a plurality of electric assist vehicles. The charging device includes a device converter and a device induction coil. The device induction coil is electrically connected to the device converter. Among the plurality of electric assist vehicles, the first electric assist vehicle provides wireless vehicle electrical energy to the device induction coil in the first operation mode. The charging device provides wireless vehicle electrical energy to at least one electric assist vehicle other than the first electric assist vehicle in the first operation mode.

[0006] The operation method of the present invention can be applied to a wireless power supply system. The wireless power supply system includes a charging device and a plurality of electric assist vehicles. The charging device includes a device converter and a device induction coil. The operation method includes providing wireless vehicle electrical energy to the device induction coil by the first electric assist vehicle among the plurality of electric assist vehicles in the first operation mode, and providing wireless carrier electrical energy to at least one electric assist vehicle other than the first electric assist vehicle by the charging device in the first operation mode.

Advantages of the Invention

[0007] As described above, the wireless power supply system includes a single charging device. Thus, the wireless power supply system has a low system construction cost. Further, in the first operation mode, the first electric assist vehicle provides wireless vehicle electrical energy to at least one electric assist vehicle other than the first electric assist vehicle. Thus, the wireless power supply system provides a new wireless power supply method.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0009] Some embodiments of the present invention will be described in detail below in conjunction with the drawings. However, the reference numerals of the components cited in the following description are treated as the same or similar elements shown in different drawings. These embodiments are only a part of the present invention and do not disclose all the possible embodiments of the present invention. Rather, these embodiments are merely examples within the scope of the claims of the present invention.

[0010] Referring to FIG. 2, FIG. 2 is a schematic diagram of a wireless power supply system according to an embodiment of the present invention. In this embodiment, the wireless power supply system 100 includes a charging device 110 and electric assist vehicles 120_1 to 120_n. The wireless power supply system 100 can perform wireless power supply to at least one of the electric assist vehicles 120_1 to 120_n. In this embodiment, the charging device 110 includes a device converter 111 and a device induction coil 112. The device induction coil 112 is electrically connected to the device converter 111.

[0011] In this embodiment, the electric assist vehicles 120_1 to 120_n may each be an electric assist transportation tool. The electric assist vehicles 120_1 to 120_n are, for example, electric assist wheelchairs, electric assist bicycles, electric kick scooters, or electric motorcycles, respectively, but are not limited thereto. In this embodiment, the wireless power supply system 100 can provide different wireless power supply operations in different operation modes. For example, in the first operation mode, the electric assist vehicle 120_1 provides the wireless vehicle electrical energy PC1 to the device induction coil 112. The charging device 110 provides the wireless vehicle electrical energy PC1 to at least one of the electric assist vehicles 120_2 to 120_n in the first operation mode.

[0012] The point to note here is that in the first operation mode, the electric assist vehicle 120_1 provides the wireless vehicle electrical energy PC1 to at least one of the electric assist vehicles 120_2 to 120_n via the device induction coil 112. In this way, the wireless power supply system 100 provides a new wireless power supply method. In addition, the wireless power supply system 100 includes a single charging device 110. In this way, the wireless power supply system 100 has a low system construction cost.

[0013] In this embodiment, the electric assist vehicle 120_1 includes a battery 121_1, a vehicle induction coil 122_1, and a vehicle converter 123_1. The battery 121_1 stores battery electrical energy PB1. The vehicle converter 123_1 is electrically connected to the battery 121_1 and the vehicle induction coil 122_1. The electric assist vehicle 120_2 includes a battery 121_2, a vehicle induction coil 122_2, and a vehicle converter 123_2. The battery 121_2 stores battery electrical energy PB2. The vehicle converter 123_2 is electrically connected to the battery 121_2 and the vehicle induction coil 122_2.

[0014] In the first operation mode, the vehicle converter 123_1 converts the battery electrical energy PB1 into the wireless vehicle electrical energy PC1 and provides the wireless vehicle electrical energy PC1 to the vehicle induction coil 122_1. The vehicle induction coil 122_1 provides the wireless vehicle electrical energy PC1 to the device induction coil 112. In the first operation mode, the vehicle induction coil 122_2 receives the wireless vehicle electrical energy PC1 from the device induction coil 112. The vehicle converter 123_2 converts the wireless vehicle electrical energy PC1 into the battery electrical energy PB2 and stores the battery electrical energy PB2 in the battery 121_2.

[0015] Referring to FIGS. 2 and 3 simultaneously, FIG. 3 is a flowchart of an operation method according to an embodiment of the present invention. In this embodiment, the operation method S100 is applied to the wireless power supply system 100. The operation method S100 shows the operation in the first operation mode. The operation method S100 includes steps S110 and S120. In step S110, the electric assist vehicle 120_1 provides the wireless vehicle electrical energy PC1 to the device induction coil 112. In step S120, the charging device 110 provides the wireless vehicle electrical energy PC1 to at least one of the electric assist vehicles 120_2 to 120_n. Specific embodiments of steps S110 and S120 are clearly described in the embodiment of FIG. 2, and thus will not be repeated here.

[0016] Returning to the embodiment of FIG. 2, in the second operation mode, the electric assist vehicle 120_1 can provide the wireless vehicle electrical energy PC1 to at least one of the electric assist vehicles 120_2 to 120_n without passing through the device induction coil 112.

[0017] For example, in the second operation mode, the vehicle converter 123_1 of the electric assist vehicle 120_1 converts the battery electrical energy PB1 into wireless vehicle electrical energy PC1, and provides the wireless vehicle electrical energy PC1 to the vehicle induction coil 122_1. In the second operation mode, the vehicle induction coil 122_2 of the electric assist vehicle 120_2 receives the wireless vehicle electrical energy PC1 from the vehicle induction coil 122_1. The vehicle converter 123_2 converts the wireless vehicle electrical energy PC1 into battery electrical energy PB2, and stores the battery electrical energy PB2 in the battery 121_2.

[0018] Taking the electric assist vehicles 120_1 and 120_2 as an example, the electric assist vehicles 120_1 and 120_2 can perform operations corresponding to the first operation mode in the wireless charging field of the charging device 110. The electric assist vehicles 120_1 and 120_2 can perform operations corresponding to the second operation mode outside the wireless charging field of the charging device 110.

[0019] In the third operation mode, the charging device 110 can perform wireless power supply to the electric assist vehicles 120_1 to 120_n.

[0020] For example, in the third operation mode, the device converter 111 converts the device electrical energy PN into wireless device electrical energies PN1 to PNn, and provides the wireless device electrical energies PN1 to PNn to the device induction coil 112. The device induction coil 112 transmits the wireless device electrical energies PN1 to PNn. The vehicle induction coil 122_1 receives the wireless device electrical energy PN1. In the third operation mode, the vehicle converter 123_1 converts the wireless device electrical energy PN1 into battery electrical energy PB1, and stores the battery electrical energy PB1 in the battery 121_1. The vehicle induction coil 122_2 receives the wireless device electrical energy PN2. The vehicle converter 123_2 converts the wireless device electrical energy PN2 into battery electrical energy PB2, and stores the battery electrical energy PB2 in the battery 121_2.

[0021] For example, the vehicle converter 123_1 operates based on the operating frequency F1. The vehicle converter 123_2 operates based on the operating frequency F2. The operating frequency F1 and the operating frequency F2 are different. The device converter 111 operates based on the operating frequency F1 in the first period and operates based on the operating frequency F2 in the second period. For example, the first period and the second period may be arranged alternately. It should be noted here that in the first period, the charging device 110 can transmit the wireless device electrical energy PN1 based on the operating frequency F1, and use the wireless device electrical energy PN1 to charge the battery 121_1 of the electric assist vehicle 120_1. In the second period, the charging device 110 can transmit the wireless device electrical energy PN2 based on the operating frequency F2, and use the wireless device electrical energy PN2 to charge the battery 121_2 of the electric assist vehicle 120_2. Therefore, the charging device 110 can selectively supply power to the electric assist vehicles 120_1 and 120_2 in a time-division manner.

[0022] In some embodiments, the operating frequency F1 and the operating frequency F2 are the same. Therefore, the charging device 110 can supply power to the electric assist vehicles 120_1 and 120_2 simultaneously.

[0023] In some embodiments, the charging voltage required to charge the batteries 121_1 and 121_2 may not be the same as the wireless device electrical energies PN1, PN2, and the device electrical energy PN. Therefore, the electric assist vehicle 120_1 can use a voltage adjustment circuit to adjust the voltage value of the battery electrical energy PB1. The electric assist vehicle 120_2 can use a voltage adjustment circuit to adjust the voltage value of the battery electrical energy PB2. Furthermore, the charging device 110 can use a voltage adjustment circuit to adjust the voltage value of the device electrical energy PN.

[0024] In this embodiment, the charging device 110 can calculate the common mode operating frequencies of the operating frequencies F1 and F2. The device converter 111 operates based on the common mode operating frequency and generates wireless device electrical energies PN1 and PN2. Therefore, the charging device 110 can simultaneously supply power to the electric assist vehicles 120_1 and 120_2.

[0025] In the fourth operation mode, at least one of the electric assist vehicles 120_1 to 120_n can wirelessly supply power to the charging device 110.

[0026] For example, in the fourth operation mode, taking the electric assist vehicle 120_1 as an example, the vehicle converter 123_1 converts the battery electrical energy PB1 into wireless vehicle electrical energy PC1 and provides the wireless vehicle electrical energy PC1 to the vehicle induction coil 122_1. The device induction coil 112 receives the wireless vehicle electrical energy PC1. In the fourth operation mode, the device converter 111 converts the wireless vehicle electrical energy PC1 into device electrical energy PN and provides the device electrical energy PN to the power grid ENT.

[0027] Referring to FIG. 4, FIG. 4 is a schematic circuit diagram of a wireless power supply system according to an embodiment of the present invention. In this embodiment, the wireless power supply system 200 includes a charging device 210 and electric assist vehicles 220_1 and 220_2. The wireless power supply system 200 can be used for the power supply operations in the first operation mode, the second operation mode, the third operation mode, and the fourth operation mode described in FIG. 2. Since the power supply operations in the first operation mode, the second operation mode, the third operation mode, and the fourth operation mode are clearly described in the embodiment of FIG. 2, they will not be repeated here.

[0028] In this embodiment, the charging device 210 includes a device converter 211, a device induction coil 212, and a controller 213. The device converter 211 includes a full-bridge type device conversion circuit 2111, a device resonance circuit 2112, and a device switch 2113. The device resonance circuit 2112 is electrically connected between the device induction coil 212 and the full-bridge type device conversion circuit 2111. The first terminal of the device switch 2113 is electrically connected to the device resonance circuit 2112. The second terminal of the device switch 2113 is electrically connected to the full-bridge type device conversion circuit 2111. The switching operation of the device switch 2113 determines the resonance operation of the device resonance circuit 2112. For example, when the device switch 2113 is turned on, the device resonance circuit 2112 performs a resonance operation on at least one wireless device electrical energy based on at least one operating frequency. When the device switch 2113 is turned off, the device resonance circuit 2112 stops the resonance operation.

[0029] Furthermore, the full-bridge type device conversion circuit 2111 includes a plurality of power switches (not shown). The device resonance circuit 2112 includes an inductor LR and capacitors CP, CR. The first terminal of the inductor LR is electrically connected to the first terminal of the full-bridge type device conversion circuit 2111. The first terminal of the capacitor CP is electrically connected to the second terminal of the inductor LR. The second terminal of the capacitor CP is electrically connected to the first terminal of the device induction coil 212. The first terminal of the capacitor CR is electrically connected to the second terminal of the inductor LR. The second terminal of the capacitor CR is electrically connected to the second terminal of the device induction coil 212. The first terminal of the device switch 2113 is electrically connected to the second terminal of the device induction coil 212 and the second terminal of the capacitor CR. The second terminal of the device switch 2113 is electrically connected to the second terminal of the full-bridge type device conversion circuit 2111. The operating frequency of the device resonance circuit 2112 may be determined by the inductance value of the inductor LR, the capacitance value of the capacitor CP, and the capacitance value of the capacitor CR.

[0030] In some embodiments, the inductor LR may be a variable inductor. At least one of the capacitors CP and CR may be a variable capacitor. Therefore, the operating frequency of the device resonant circuit 2112 can be changed.

[0031] In this embodiment, the controller 213 is electrically connected to the control terminals of the plurality of power switches of the full-bridge type device conversion circuit 2111 and the control terminal of the device switch 2113. The controller 213 can control the plurality of power switches of the full-bridge type device conversion circuit 2111 and the device switch 2113 based on the first operation mode, the second operation mode, the third operation mode, and the fourth operation mode.

[0032] In this embodiment, the electric assist vehicle 220_1 includes a battery 221_1, a vehicle induction coil 222_1, a vehicle converter 223_1, and a controller 224_1. The vehicle converter 223_1 includes a full-bridge type vehicle conversion circuit 2231_1, a vehicle resonant circuit 2232_1, and a vehicle switch 2233_1. The full-bridge type vehicle conversion circuit 2231_1 is electrically connected to the battery 221_1. The vehicle resonant circuit 2232_1 is electrically connected between the first terminal of the vehicle induction coil 222_1 and the full-bridge type vehicle conversion circuit 2231_1. The first terminal of the vehicle switch 2233_1 is electrically connected to the second terminal of the vehicle induction coil 222_1. The second terminal of the vehicle switch 2233_1 is electrically connected to the full-bridge type vehicle conversion circuit 2231_1.

[0033] More specifically, the full-bridge type vehicle conversion circuit 2231_1 includes a plurality of power switches (not shown). The vehicle resonant circuit 2232_1 includes a capacitor CS1. The capacitor CS1 is electrically connected between the first terminal of the vehicle induction coil 222_1 and the first terminal of the full-bridge type vehicle conversion circuit 2231_1. The second terminal of the vehicle switch 2233_1 is electrically connected to the second terminal of the full-bridge type vehicle conversion circuit 2231_1. The operating frequency of the vehicle resonant circuit 2232_1 may be determined by the capacitance value of the capacitor CS1.

[0034] In this embodiment, the controller 224_1 is electrically connected to the control terminals of the plurality of power switches of the full-bridge type vehicle conversion circuit 2231_1 and the control terminal of the vehicle switch 2233_1. The controller 224_1 can control the plurality of power switches of the full-bridge type vehicle conversion circuit 2231_1 and the vehicle switch 2233_1 based on the first operation mode, the second operation mode, the third operation mode, and the fourth operation mode.

[0035] In this embodiment, the electric assist vehicle 220_2 includes a battery 221_2, a vehicle induction coil 222_2, a vehicle converter 223_2, and a controller 224_2. The vehicle converter 223_2 includes a full-bridge type vehicle conversion circuit 2231_2, a vehicle resonance circuit 2232_2, and a vehicle switch 2233_2. The full-bridge type vehicle conversion circuit 2231_2 is electrically connected to the battery 221_2. The vehicle resonance circuit 2232_2 is electrically connected between the first terminal of the vehicle induction coil 222_2 and the full-bridge type vehicle conversion circuit 2231_2. The first terminal of the vehicle switch 2233_2 is electrically connected to the second terminal of the vehicle induction coil 222_2. The second terminal of the vehicle switch 2233_2 is electrically connected to the full-bridge type vehicle conversion circuit 2231_2.

[0036] More specifically, the full-bridge type vehicle conversion circuit 2231_2 includes a plurality of power switches (not shown). The vehicle resonance circuit 2232_2 includes a capacitor CS2. The capacitor CS2 is electrically connected between the first terminal of the vehicle induction coil 222_2 and the first terminal of the full-bridge type vehicle conversion circuit 2231_2. The second terminal of the vehicle switch 2233_2 is electrically connected to the second terminal of the full-bridge type vehicle conversion circuit 2231_2. The operating frequency of the vehicle resonance circuit 2232_2 may be determined by the capacitance value of the capacitor CS2.

[0037] In this embodiment, the controller 224_2 is electrically connected to the control terminals of the plurality of power switches of the full-bridge type vehicle conversion circuit 2231_2 and the control terminal of the vehicle switch 2233_2. The controller 224_2 can control the plurality of power switches and the vehicle switch 2233_2 of the full-bridge type vehicle conversion circuit 2231_2 based on the first operation mode, the second operation mode, the third operation mode, and the fourth operation mode.

[0038] In the first operation mode, the controller 213 controls the full-bridge type device conversion circuit 2111 not to operate and turns off the device switch 2113. In the first operation mode, the controller 224_1 controls the switching operation of the plurality of power switches of the full-bridge type vehicle conversion circuit 2231_1 using the control signals SC6 to SC9 and turns on the vehicle switch 2233_1 using the control signal SC10. Therefore, the vehicle converter 223_1 forms a resonant DC-AC power converter. The vehicle converter 223_1 converts the battery electrical energy PB1 into the wireless vehicle electrical energy PC1. The battery electrical energy PB1 is DC electrical energy. The wireless vehicle electrical energy PC1 is AC electrical energy. The vehicle induction coil 222_1 transmits the wireless vehicle electrical energy PC1 to the device induction coil 212. In the first operation mode, the vehicle induction coil 222_2 receives the wireless vehicle electrical energy PC1 from the device induction coil 212. The controller 224_2 controls the switching operation of the plurality of power switches of the full-bridge type vehicle conversion circuit 2231_2 using the control signals SC11 to SC14 and turns on the vehicle switch 2233_2 using the control signal SC15. The battery electrical energy PB2 is DC electrical energy. Therefore, the vehicle converter 223_2 forms a full-bridge type rectifier. The vehicle converter 223_2 converts the wireless vehicle electrical energy PC1 into the battery electrical energy PB2.

[0039] In the second operation mode, the controller 213 controls the full-bridge type device conversion circuit 2111 and the device switch 2113 not to operate. In the second operation mode, the controller 224_1 uses the control signals SC6 to SC9 to control the switching operations of a plurality of power switches of the full-bridge type vehicle conversion circuit 2231_1, and uses the control signal SC10 to turn on the vehicle switch 2233_1. Therefore, the vehicle converter 223_1 forms a resonant DC-AC power converter. The vehicle converter 223_1 converts the battery electrical energy PB1 into the wireless vehicle electrical energy PC1. The vehicle induction coil 222_1 transmits the wireless vehicle electrical energy PC1 to the device induction coil 212. In the second operation mode, the vehicle induction coil 222_2 receives the wireless vehicle electrical energy PC1 from the device induction coil 212. The controller 224_2 uses the control signals SC11 to SC14 to control the switching operations of a plurality of power switches of the full-bridge type vehicle conversion circuit 2231_2, and uses the control signal SC15 to turn on the vehicle switch 2233_2. Therefore, the vehicle converter 223_2 forms a full-bridge type rectifier. The vehicle converter 223_2 converts the wireless vehicle electrical energy PC1 into the battery electrical energy PB2.

[0040] In the third operation mode, the controller 213 uses the control signals SC1 to SC4 to control the switching operations of a plurality of power switches of the full-bridge type device conversion circuit 2111, and uses the control signal SC5 to turn on the device switch 2113. Therefore, the device converter 211 forms a resonant DC-AC power converter. The device converter 211 converts the device electrical energy PN into at least one of the wireless device electrical energies PN1 and PN2. The device electrical energy PN is DC electrical energy. The wireless device electrical energies PN1 and PN2 are AC electrical energies.

[0041] In the third operation mode, the controller 224_1 controls the switching operations of a plurality of power switches of the full-bridge type vehicle conversion circuit 2231_1 using the control signals SC6 to SC9, and turns on the vehicle switch 2233_1 using the control signal SC10. Accordingly, the vehicle converter 223_1 forms a full-bridge type rectifier. The vehicle converter 223_1 converts the wireless device electrical energy PN1 into the battery electrical energy PB1. The controller 224_2 controls the switching operations of a plurality of power switches of the full-bridge type vehicle conversion circuit 2231_2 using the control signals SC11 to SC14, and turns on the vehicle switch 2233_2 using the control signal SC15. Accordingly, the vehicle converter 223_2 forms a full-bridge type rectifier. The vehicle converter 223_2 converts the wireless device electrical energy PN2 into the battery electrical energy PB2.

[0042] In the fourth operation mode, the controller 224_1 controls the switching operations of a plurality of power switches of the full-bridge type vehicle conversion circuit 2231_1 using the control signals SC6 to SC9, and turns on the vehicle switch 2233_1 using the control signal SC10. Accordingly, the vehicle converter 223_1 forms a resonant DC-AC power converter. The vehicle converter 223_1 converts the battery electrical energy PB1 into the wireless vehicle electrical energy PC1. In the fourth operation mode, the controller 224_2 controls the switching operations of a plurality of power switches of the full-bridge type vehicle conversion circuit 2231_2 using the control signals SC11 to SC14, and turns on the vehicle switch 2233_2 using the control signal SC15. Accordingly, the vehicle converter 223_2 forms a resonant DC-AC power converter. The vehicle converter 223_2 converts the battery electrical energy PB2 into the wireless vehicle electrical energy PC2.

[0043] In the fourth operation mode, the controller 213 controls the switching operations of a plurality of power switches of the full-bridge type device conversion circuit 2111 using the control signals SC1 to SC4, and turns on the device switch 2113 using the control signal SC5. Therefore, the full-bridge type device conversion circuit 2111 forms a full-bridge type rectifier. The device converter 211 converts at least one of the wireless vehicle electrical energies PC1 and PC2 into the device electrical energy PN.

[0044] In this embodiment, the controller 213 receives the feedback current values and feedback voltage values of the device electrical energy PN, the wireless device electrical energies PN1 and PN2, and can control the device electrical energy PN and the wireless device electrical energies PN1 and PN2 based on the feedback current values and feedback voltage values so as to meet the expected power specifications. The controller 224_1 receives the feedback current value and feedback voltage value of the battery electrical energy PB1 and the wireless vehicle electrical energy PC1, and can control the battery electrical energy PB1 and the wireless vehicle electrical energy PC1 based on the feedback current value and feedback voltage value so as to meet the expected power specifications. The controller 224_2 receives the feedback current value and feedback voltage value of the battery electrical energy PB2 and the wireless vehicle electrical energy PC2, and can control the battery electrical energy PB2 and the wireless vehicle electrical energy PC2 based on the feedback current value and feedback voltage value so as to meet the expected power specifications.

[0045] To sum up, the wireless power supply system of the present invention only requires a single charging device. Thus, the wireless power supply system has a low system construction cost. The wireless power supply system provides various wireless power supply methods. In the first operation mode, the first electric assist vehicle provides wireless vehicle electrical energy to at least one electric assist vehicle other than the first electric assist vehicle. Thus, the wireless power supply system provides a new wireless power supply method. Further, in the first period, the charging device transmits the first wireless device electrical energy based on the first operating frequency, and the battery of the first electric assist vehicle can be charged using the first wireless device electrical energy. In the second period, the charging device transmits the second wireless device electrical energy based on the second operating frequency, and the battery of the second electric assist vehicle can be charged using the second wireless device electrical energy. In this way, the charging device can selectively supply power to a plurality of electric assist vehicles in a time-sharing manner.

[0046] As described above, the present invention has been disclosed through the embodiments, but these are not intended to limit the present invention. Those with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the appended claims.

Industrial Applicability

[0047] The present invention provides a wireless power supply system with a low system construction cost and an operation method used in the wireless power supply system. Further, the wireless power supply system provides a new wireless power supply method.

Explanation of Reference Numerals

[0048] 10, 100, 200: Wireless power supply system 11_1~11_n, 110, 210: Charging device 111, 211: Device converter 112, 212: Device induction coil 12_1~12_n, 120_1~120_n, 220_1, 220_2: Electrically assisted vehicle 121_1, 121_2, 221_1, 221_2: Battery 122_1, 122_2, 222_1, 222_2: Vehicle induction coil 123_1, 123_2, 223_1, 223_2: Vehicle converter 13.ENT: Power system 2111: Full-bridge type device conversion circuit 2112: Device resonance circuit 2113: Device switch 213, 224_1, 224_2: Controller 2231_1, 2231_2: Full-bridge type vehicle conversion circuit 2232_1, 2232_2: Vehicle resonance circuit 2233_1, 2233_2: Vehicle switch CP, CR, CS1, CS2: Capacitor F1, F2: Operating frequency LR: Inductor PB1, PB2: Battery electrical energy PC1, PC2: Wireless vehicle electrical energy PN: Device electrical energy PN1~PNn: Wireless device electrical energy S100: Operating method S110, S120: Step SC1~SC15: Control signal

Claims

1. a charging device including a device transducer and a device induction coil electrically connected to the device transducer; A plurality of electrically assisted vehicles; a first electrically assisted vehicle of the plurality of electrically assisted vehicles providing wireless vehicle electrical energy to the device induction coil in a first operating mode; A wireless power supply system, wherein the charging device provides the wireless vehicle electric energy to at least one electrically assisted vehicle other than the first electrically assisted vehicle in the first operation mode.

2. The first electric assisted vehicle, a first battery configured to store electrical energy; a first vehicle induction coil; a first vehicle converter electrically connected to the first battery and the first vehicle induction coil and configured to convert the first battery electrical energy into the wireless vehicle electrical energy and provide the wireless vehicle electrical energy to the first vehicle induction coil in the first mode of operation; The wireless power transfer system of claim 1 , wherein the first vehicle induction coil provides the wireless vehicle electrical energy to the device induction coil in the first mode of operation.

3. A second electric assisted vehicle among the plurality of electric assisted vehicles, A second battery; a second vehicle induction coil positioned to receive the wireless vehicle electrical energy from the device induction coil in the first mode of operation; 3. The wireless power supply system of claim 2, further comprising: a second vehicle converter electrically connected to the second battery and the second vehicle induction coil and configured to, in the first mode of operation, convert the wireless vehicle electrical energy into second battery electrical energy and store the second battery electrical energy in the second battery.

4. In a second operating mode, the first vehicle converter converts the first battery electrical energy into the wireless vehicle electrical energy and provides the wireless vehicle electrical energy to the first vehicle induction coil; the second vehicle induction coil receives the wireless vehicle electrical energy from the first vehicle induction coil; The wireless power supply system of claim 3 , wherein the second vehicle converter converts the wireless vehicle electrical energy to the second battery electrical energy and stores the second battery electrical energy in the second battery.

5. In a third operating mode, the device converter converts device electrical energy into wireless device electrical energy and provides the wireless device electrical energy to the device induction coil; The wireless power supply system of claim 3 , wherein the device induction coil transmits electrical energy to the wireless device.

6. In the third mode of operation, the first vehicle induction coil receives the wireless device electrical energy; The wireless power supply system of claim 5 , wherein the first vehicle converter converts the wireless device electrical energy to the first battery electrical energy and stores the first battery electrical energy in the first battery.

7. the first vehicle transducer operates based on a first operating frequency; The wireless power transfer system according to claim 6 , wherein the second vehicle transducer operates based on a second operating frequency.

8. the device converter operates at the first operating frequency during a first period of time; The wireless power supply system according to claim 7 , wherein the wireless power supply system operates based on the second operating frequency during a second period.

9. In a fourth operating mode, the first vehicle converter converts the first battery electrical energy into the wireless vehicle electrical energy and provides the wireless vehicle electrical energy to the first vehicle induction coil; the device induction coil receives the wireless vehicle electrical energy; The wireless power supply system of claim 2 , wherein the device converter converts the wireless vehicle electrical energy into device electrical energy and provides the device electrical energy to a power grid.

10. The first vehicle transducer includes: a full-bridge type vehicle conversion circuit electrically connected to the first battery; a vehicle resonant circuit electrically connected between a first terminal of the first vehicle induction coil and the full-bridge type vehicle conversion circuit; a vehicle switch having a first terminal electrically connected to a second terminal of the first vehicle induction coil and a second terminal electrically connected to the full-bridge type vehicle conversion circuit; When the vehicle switch is turned on, the vehicle resonant circuit operates to resonate with the wireless vehicle electric energy based on a first operating frequency; The wireless power supply system of claim 2 , wherein the vehicle resonant circuit stops the resonant operation when the vehicle switch is turned off.

11. The device converter includes: A full-bridge converter circuit; a device resonant circuit electrically connected between the device induction coil and the full-bridge device conversion circuit; a device switch having a first terminal electrically connected to the device resonant circuit and a second terminal electrically connected to the full-bridge device conversion circuit; When the device switch is turned on, the device resonant circuit performs a resonant operation for at least one wireless device electrical energy based on at least one operating frequency; The wireless power supply system of claim 1 , wherein when the device switch is turned off, the device resonant circuit stops the resonant operation.

12. An operation method for a wireless power supply system including a charging device including a device converter and a device induction coil, and a plurality of electrically assisted vehicles, comprising: providing wireless vehicle electrical energy to the device induction coil in a first operational mode by a first electrically assisted vehicle of the plurality of electrically assisted vehicles; providing, by the charging device, the wireless vehicle electric energy to at least one electrically assisted vehicle other than the first electrically assisted vehicle in the first operating mode.

13. the first electrically assisted vehicle includes a first battery, a first vehicle induction coil, and a first vehicle transducer, providing the wireless vehicle electric energy to the device induction coil by the first electrically assisted vehicle in the first operating mode; converting, by a first vehicle converter, first battery electrical energy from the first battery into the wireless vehicle electrical energy and providing the wireless vehicle electrical energy to the first vehicle induction coil; The method of claim 12 further comprising providing the wireless vehicle electrical energy to the device induction coil by the first vehicle induction coil.

14. a second electrically assisted vehicle among the plurality of electrically assisted vehicles including a second battery, a second vehicle induction coil, and a second vehicle converter; and providing the wireless vehicle electric energy to at least one electrically assisted vehicle other than the first electrically assisted vehicle by the charging device in the first operation mode; 14. The method of claim 13, further comprising: converting, by the second vehicle converter, the wireless vehicle electrical energy to second battery electrical energy and storing the second battery electrical energy in the second battery.

15. In a second operating mode, converting, by the first vehicle converter, the first battery electrical energy into the wireless vehicle electrical energy and providing the wireless vehicle electrical energy to the first vehicle induction coil; receiving, by the second vehicle induction coil, the wireless vehicle electrical energy from the first vehicle induction coil; 15. The method of claim 14, further comprising: converting, by the second vehicle converter, the wireless vehicle electrical energy to the second battery electrical energy and storing the second battery electrical energy in the second battery.

16. In a third operating mode, converting device electrical energy with the device converter into wireless device electrical energy and providing the wireless device electrical energy to the device induction coil; 15. The method of claim 14, further comprising transmitting the wireless device electrical energy with the device induction coil.

17. In the third mode of operation, receiving the wireless device electrical energy by the first vehicle induction coil; 17. The method of claim 16, further comprising: converting, by the first vehicle converter, the wireless device electrical energy to the first battery electrical energy and storing the first battery electrical energy in the first battery.

18. the first vehicle transducer operates based on a first operating frequency; The method of claim 17 , wherein the second vehicle transducer operates according to a second operating frequency.

19. 20. The method of claim 18, wherein the device converter operates according to the first operating frequency during a first period and operates according to the second operating frequency during a second period.

20. In a fourth operating mode, converting, by the first vehicle converter, the first battery electrical energy into the wireless vehicle electrical energy and providing the wireless vehicle electrical energy to the first vehicle induction coil; receiving the wireless vehicle electrical energy by the device induction coil; The method of claim 13 further comprising converting, with the device converter, the wireless vehicle electrical energy to device electrical energy and providing the device electrical energy to an electrical grid.

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