Wireless charging device and wireless charging method

Patent metadata

Field	Value
Publication number	US-12476487-B2
Application number	US-202418891763-A
Country	US
Kind code	B2
Filing date	Sep 20, 2024
Priority date	Oct 20, 2023
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A wireless charging device and wireless charging method are disclosed. By movably setting a transmitting coil module within the wireless charging device and obtaining the position signal of the receiving coil to transmit to the controller, and connecting the sliding rod of the sliding resistor to the transmitting coil module, so that the transmitting coil module drives the sliding rod to slide during the moving process. The controller determines the position information of the receiving coil based on the position signal and detects the current electrical parameters of the sliding resistor. According to the current electrical parameters, it determines the current position information of the transmitting coil module and controls the transmitting coil module to move, enabling the transmitting coil module to accurately position and charge wirelessly with the receiving coil. Thereby, the wireless charging device may adapt to charging devices with receiving coils at different heights.

First claim

We claim:

1 . A wireless charging device, wherein the wireless charging device comprises:
a transmitting coil module, the transmitting coil module is movably set within the wireless charging device, and is configured to obtain a position signal of a receiving coil; a sliding resistor, including a sliding rod, the sliding rod is connected to the transmitting coil module, enabling the transmitting coil module to drive the sliding rod to slide during the moving process; a controller, electrically connected to the sliding resistor, the controller is configured to determine a position information of the receiving coil based on the position signal transmitted from the transmitting coil module and detect current electrical parameters of the sliding resistor, and determine a current position information of the transmitting coil module according to the current electrical parameters, and controlling the transmitting coil module to move, enabling the transmitting coil module to position and charge wirelessly with the receiving coil.

2 . The wireless charging device according to claim 1 , wherein the wireless charging device further comprises:
a motor module, comprising a motor and a transmission mechanism; wherein, the controller is further configured to control the motor to drive the transmission mechanism to move the transmitting coil module.

3 . The wireless charging device according to claim 2 , the wireless charging device further comprises:
a driving circuit, electrically connected to the motor and the controller; wherein, the controller is further configured to control the driving circuit to output a driving signal to transmit to the motor, enabling the motor to drive the transmission mechanism to move the transmitting coil module to a height corresponding to the driving signal.

4 . The wireless charging device according to claim 3 , wherein the wireless charging device further comprises:
a power supply circuit, electrically connected to the controller and the transmitting coil module, for converting a direct current (DC) signal to an alternating current (AC) signal to be sent, to transmit to the transmitting coil module; wherein, the transmitting coil module is further configured to wirelessly transmit the AC signal to be sent to the receiving coil.

5 . The wireless charging device according to claim 4 , wherein the controller is further configured to:
in response to the DC signal being detected, control the driving circuit to output a first driving signal, enabling the motor to drive the transmission mechanism to move the transmitting coil module from a first height to a second height, wherein the first height is less than the second height.

6 . The wireless charging device according to claim 5 , wherein the wireless charging device further comprises:
an optical sensor, electrically connected to the controller, for detecting an optical signal to transmit to the controller; wherein, the controller is further configured to, in response to an intensity of the optical signal being less than a threshold value, control the driving circuit to output a second driving signal based on the position information of the receiving coil and the current position information of the transmitting coil module, enabling the motor to drive the transmission mechanism to move the transmitting coil module from the second height to a third height, thereby enabling the transmitting coil module to position and charge wirelessly with the receiving coil, the second height being greater than the third height.

7 . The wireless charging device according to claim 6 , wherein the controller is further configured to:
in response to the intensity of the optical signal being greater than or equal to the threshold value, controlling the driving circuit to output a third driving signal, enabling the motor to drive the transmission mechanism to move the transmitting coil module from the third height to the second height.

8 . The wireless charging device according to claim 6 , wherein the wireless charging device further comprises:
a backup power source, electrically connected to the power supply circuit; wherein, the power supply circuit is configured to generate a charging signal based on the DC signal, to transmit to the backup power source for charging.

9 . The wireless charging device according to claim 8 , wherein the wireless charging device further comprises:
a power supply interface, configured to transmit the DC signal to the power supply circuit; wherein the backup power source is configured to supply power to the driving circuit when the wireless charging device is in a power-off state, and the power-off state represents that the power supply interface does not receive the DC signal provided by an external charging line.

10 . The wireless charging device according to claim 8 , wherein the backup power source is electrically connected to the controller, the controller is further configured to, in response to a discharge signal of the backup power source is detected and the intensity of the optical signal being greater than or equal to the threshold value, control the driving circuit to output a fourth driving signal, enabling the motor to drive the transmission mechanism to move the transmitting coil module from the third height to the first height.

11 . The wireless charging device according to claim 1 , wherein the position signal represents electrical parameters of the receiving coil, the controller is further configured to determine the position information of the receiving coil based on the electrical parameters of the receiving coil.

12 . The wireless charging device according to claim 1 , wherein the position signal represents the position information of the receiving coil, the controller is further configured to parse the position signal to determine the position information of the receiving coil.

13 . The wireless charging device according to claim 4 , wherein the transmitting coil module comprises:
a first transmitting coil, electrically connected to the power supply circuit; a second transmitting coil, electrically connected to the power supply circuit; wherein, the first transmitting coil and the second transmitting coil are set at different heights of the transmitting coil module, the first transmitting coil or the second transmitting coil is configured to wirelessly transmit the AC signal to be sent to the receiving coil.

14 . The wireless charging device according to claim 13 , wherein the first transmitting coil and the second transmitting coil are electrically connected to the controller, the controller is further configured to:
in response to electrical parameters of the first transmitting coil or the second transmitting coil meets a working parameter, control the transmitting coil module to move, enabling the first transmitting coil or the second transmitting coil to position and charge wirelessly with the receiving coil.

15 . The wireless charging device according to claim 3 , wherein the driving circuit comprises:
a resistor; a driving chip, electrically connected to the motor through the resistor, the driving chip is configured to transmit the driving signal to the motor through the resistor.

16 . The wireless charging device according to claim 15 , wherein the resistor is electrically connected to the controller, the controller is further configured to:
in response to a current value represented by the driving signal is detected as being greater than a predetermined current value, control the driving chip to stop outputting the driving signal, for

Assignees

• Lanto Electronic Ltd

Inventors

• Li Peng
• Zhou Bin
• Li Shuai
• Wang Fuqiang

Classifications

• H02J7/44

  between battery management systems and power sources · CPC title

• H02J50/10 Primary

  using inductive coupling · CPC title

• H02J50/90

  involving detection or optimisation of position, e.g. alignment · CPC title

• H02J50/12 Primary

  of the resonant type · CPC title

• H02J50/005 Primary

  Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices · CPC title