Wireless power reception apparatus and mobile terminal

Patent metadata

Field	Value
Publication number	US-11611237-B2
Application number	US-202017021402-A
Country	US
Kind code	B2
Filing date	Sep 15, 2020
Priority date	May 25, 2018
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

A wireless power reception apparatus and a mobile terminal are provided. The wireless power reception apparatus includes the following. A coil includes a first end, a second end, and a tap. The coil defined by the first end and the second end is configured to provide a first voltage, and the coil defined by the first end and the tap is configured to provide a second voltage. A first rectifying unit coupled with the first end and the second end of the coil. A second rectifying unit coupled with the first end and the tap of the coil. A charging unit coupled with the first rectifying unit and configured to apply the first voltage to a battery for charging. A power supply unit coupled with the second rectifying unit and configured to apply the second voltage to power a wireless receiving chip.

First claim

What is claimed is:

1. An apparatus for wireless power reception, comprising:
a coil comprising a first end, a second end, and a tap, wherein the coil defined by the first end and the second end is configured to provide a first voltage, and the coil defined by the first end and the tap is configured to provide a second voltage;
a first rectifying unit connected with the first end and the second end of the coil;
a second rectifying unit connected with the first end and the tap of the coil;
a charging unit coupled with the first rectifying unit and configured to apply the first voltage to a battery; and
a power supply unit coupled with the second rectifying unit and configured to apply the second voltage to a wireless receiving chip.

2. The apparatus of claim 1 , further comprising:
a step-down unit coupled between the second rectifying unit and the power supply unit and configured to decrease the second voltage to a third voltage to be applied to power the wireless receiving chip.

3. The apparatus of claim 1 , wherein the first voltage is higher than the second voltage.

4. The apparatus of claim 1 , further comprising a capacitor coupled in the coil and coupled with the first rectifying unit and the second rectifying unit via the first end.

5. The apparatus of claim 1 , further comprising:
a first capacitor coupled between the first end and the first rectifying unit; and
a second capacitor coupled between the first end and the second rectifying unit.

6. The apparatus of claim 1 , wherein the tap comprises a first tap and a second tap, the coil defined by the first end and the first tap of the coil is configured to provide the second voltage, the coil defined by the first end and the second tap of the coil is configured to provide a fourth voltage, and the second rectifying unit is coupled with the first end and the first tap of the coil.

7. The apparatus of claim 6 , wherein the second tap is adjustable in position.

8. The apparatus of claim 6 , further comprising:
a third rectifying unit coupled with the first end and the second tap of the coil, wherein the charging unit is coupled with the third rectifying unit and is configured to apply one of the first voltage and the fourth voltage to charge the battery.

9. The apparatus of claim 8 , wherein more than one second tap is provided, and more than one third rectifying unit is provided, wherein each of the more than one third rectifying unit is coupled with the first end and a corresponding second tap.

10. The apparatus of claim 8 , further comprising:
a first switch coupled with the second end and the first rectifying unit;
a second switch coupled with the second tap and the third rectifying unit; and
a control unit configured to control the first switch and the second switch, wherein
the charging unit is configured to:
apply the first voltage to the battery when the first switch is closed and the first rectifying unit is in a work state; or
apply the fourth voltage to charge the battery when the second switch is closed and the third rectifying unit is in a work state.

11. The apparatus of claim 6 , further comprising:
a first switch coupled with the second end of the coil and the first rectifying unit;
a second switch coupled with the second tap and the first rectifying unit; and
a control unit configured to control the first switch and the second switch, wherein
the charging unit is configured to apply one of the first voltage and the fourth voltage to charge the battery.

12. The apparatus of claim 11 , further comprising a third rectifying unit coupled with the first end and the second tap of the coil, wherein the charging unit is coupled with the third rectifying unit and is configured to apply one of the first voltage and the fourth voltage to charge the battery, wherein more than one second tap is provided, more than one third rectifying unit is provided, and more than one second switch is provided, wherein each of the more than one third rectifying unit is coupled with the first end and a corresponding second tap.

13. The apparatus of claim 1 , wherein the charging unit comprises a step-down circuit, which is configured to decrease the first voltage received from the first rectifying unit to obtain a decreased voltage to be applied to the battery.

14. The apparatus of claim 1 , wherein the charging unit comprises a converting circuit configured to perform voltage control on the first voltage received from the first rectifying unit, wherein the converting circuit comprises:
a stabilizing circuit coupled with the first rectifying unit; and
a control circuit coupled with the battery and configured for constant voltage and constant current control.

15. The apparatus of claim 1 , wherein a position of the tap is determined according to a voltage required by the wireless receiving chip.

16. The apparatus of claim 1 , further comprising:
a communication unit configured to communicate with a wireless power supply apparatus to determine a present wireless charging mode.

17. The apparatus of claim 16 , further comprising:
a detecting circuit coupled with the charging unit and the communication unit, and configured to detect a current or a voltage outputted from the charging unit and send information on the current or voltage detected to the communication unit, wherein the communication unit is further configured to communicate the information to the wireless power supply apparatus, and according to the information received, the present wireless charging mode is adjusted at the wireless power supply apparatus.

18. A mobile terminal, comprising:
a battery;
a wireless receiving chip;
a coil comprising a first end, a second end, and a tap, wherein the coil defined by the first end and the second end is configured to provide a first voltage, and the coil defined by the first end and the tap is configured to provide a second voltage;
a first rectifying unit connected with the first end and the second end of the coil;
a second rectifying unit connected with the first end and the tap of the coil;
a charging unit coupled with the first rectifying unit and the battery, and configured to apply the first voltage to the battery; and
a power supply unit coupled with the second rectifying unit and the wireless receiving chip, and configured to apply the second voltage to the wireless receiving chip.

19. The mobile terminal of claim 18 , wherein the tap comprises a first tap and a second tap, the coil defined by the first end and the first tap of the coil is configured to provide the second voltage, the coil defined by the first end and the second tap of the coil is configured to provide a fourth voltage, and the second rectifying unit is coupled with the first end and the first tap of the coil.

20. The mobile terminal of claim 19 , further comprising:
a third rectifying unit coupled with the first end and the second tap of the coil, wherein the charging unit is coupled with the third rectifying unit and is configured to apply one of the first voltage and the fourth voltage to charge the battery.

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Chen Shebiao
• Zhang Jialiang

Classifications

• H02J2105/44

  Portable electronic devices · CPC title

• H02J7/90

  Regulation of charging or discharging current or voltage · CPC title

• H01F38/14

  Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title

• H02J7/04 Primary

  Regulation of charging current or voltage · CPC title

• H02J50/80

  involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices · CPC title