Chargeable device and charging method

Patent metadata

Field	Value
Publication number	US-10727679-B2
Application number	US-201715555399-A
Country	US
Kind code	B2
Filing date	Feb 15, 2017
Priority date	Oct 12, 2016
Publication date	Jul 28, 2020
Grant date	Jul 28, 2020

Abstract

A chargeable device and a charging method are proposed. The chargeable device includes a charging interface and a first charging circuit coupled to the charging interface. The first charging circuit receives voltage and current outputted by an adapter through the charging interface and to apply the voltage and current outputted by the adapter between two terminals of multiple cells coupled in series built in the chargeable device to charge the multiple cells directly.

First claim

What is claimed is:

1. A chargeable device, capable of being charged with a quick charging mode or a normal charging module, and the chargeable device, comprising:
a charging interface;
a first charging circuit, coupled to the charging interface; and
a second charging circuit, coupled in parallel with the first charging circuit;
wherein when the chargeable device is charged with the quick charging mode, the first charging circuit is selected and configured to receive voltage and current outputted by an adapter through the charging interface, and to apply the voltage and current outputted by the adapter on a positive terminal and a negative terminal of multiple cells coupled in series built in the chargeable device to charge the multiple cells directly; when the chargeable device is charged with the normal charging mode, the second charging circuit is selected and configured to receive the output voltage from the adapter via the charging interface, step up the received output voltage, and apply the step-up output voltage on two terminals of multiple cells coupled in series built in the chargeable device to charge the multiple cells; and
wherein the chargeable device further comprises a step-down circuit coupled to two terminals of the multiple cells, the step-down circuit is configured to convert a total voltage of the multiple cells into a first voltage V 1 where a≤V 1 ≤b, a indicates a least operating voltage of the chargeable device, and b indicates a maximum operating voltage of the chargeable device, wherein the step-down circuit is a charge pump.

2. The chargeable device of claim 1 , further comprising:
a supply circuit, coupled to one of the multiple cells and configured to supply electrical power suitable for the components of the chargeable device based on the voltage of the selected one of the multiple cells.

3. The chargeable device of claim 2 , further comprising:
a balance circuit, coupled to the multiple cells, configured to balance voltage between the multiple cells.

4. The chargeable device of claim 1 , wherein the current outputted by the adapter and received by the first charging circuit is a pulsating direct current (DC) current, an alternating current, or a constant DC current.

5. The chargeable device of claim 1 , wherein the voltage and current outputted by the adapter and received by the first charging circuit is configured to charge the multiple cells under a constant current mode.

6. The chargeable device of claim 1 ,
wherein the second charging circuit comprises a voltage boost circuit coupled between the charging interface and the multiple cells,
wherein the voltage boost circuit is configured to convert the voltage outputted from the adapter and received by the first charging interface into a second voltage, and the second voltage is applied between the positive terminal and the negative terminal of the multiple cells to charge the multiple cells, wherein the voltage value outputted from the adapter is less than a total voltage of the multiple cells, and the second voltage value is greater than the total voltage of the multiple cells.

7. The chargeable device of claim 6 , wherein the voltage outputted by the adapter and received by the second charging circuit is five volts (5V).

8. The chargeable device of claim 6 , wherein the chargeable device and the adapter are selectively operable in the normal charging mode or the quick charging mode, a charging rate of the chargeable device operable in the quick charging mode is faster than a charging rate of the chargeable device operable in the normal charging mode, the adapter charges the multiple cells through the first charging circuit when the chargeable device and the adapter are selectively operable in the quick charging mode, and the adapter charges the multiple cells through the second charging circuit when the chargeable device and the adapter are selectively operable in the normal charging mode.

9. The chargeable device of claim 8 , wherein the charging interface comprises a data line, and the chargeable device further comprises a control circuit that supports bidirectional communication with the adapter through the data line to control output of the adapter operable in the quick charging mode.

10. The chargeable device of claim 9 , wherein
the control circuit is configured to communicate with the adapter in a means of bidirectional communication to negotiate a charging mode which the chargeable device and the adapter are operable in.

11. The chargeable device of claim 10 , wherein
the control circuit is configured to receive a first instruction sent by the adapter, the first instruction configured to inquire whether the chargeable device enables the quick charging mode;
the control circuit is further configured to send a reply instruction responsive to the first instruction to the adapter, the reply instruction responsive to the first instruction configured to indicate that the chargeable device whether agrees to enable the quick charging mode; and
the control circuit controls the adapter to charge the multiple cells through the first charging circuit when the chargeable device agrees to enable the quick charging mode.

12. The chargeable device of claim 1 , wherein the voltage and current outputted by the adapter satisfies the requirement expected by the multiple cells.

13. The chargeable device of claim 9 , wherein
the control circuit is configured to receive a second instruction sent by the adapter, the second instruction configured to inquire whether the voltage outputted by the adapter matches a present total voltage of the multiple cells; and
the control circuit is further configured to send a reply instruction responsive to the second instruction to the adapter, the reply instruction responsive to the second instruction configured to indicate that the voltage outputted by the adapter matches the present total voltage of the multiple cells, the voltage outputted by the adapter is less than the present total voltage of the multiple cells, or the voltage outputted by the adapter is greater than the present total voltage of the multiple cells.

14. The chargeable device of claim 9 , wherein
the control circuit is configured to receive a third instruction sent by the adapter, the third instruction configured to inquire a maximum charging current for the chargeable device; and
the control circuit is further configured to send a reply instruction responsive to the third instruction to the adapter, the reply instruction responsive to the third instruction configured to indicate the maximum charging current for the chargeable device, whereby the adapter adjusts an outputted charging current operable in the quick charging mode based on the reply instruction responsive to the third instruction and indicative of the maximum charging current for the chargeable device.

15. The chargeable device of claim 9 , wherein
the control circuit is configured to receive a fourth instruction sent by the adapter, the fourth instruction configured to inquire a present total voltage of the multiple cells; and
the control circuit is further configured to send a reply instruction responsive to the fourth instruction to the adapter, the reply instruction responsive to the fourth instruction configured to indicate the present total voltage of the multiple cells, whereby the adapter adjusts an outputted charging current based on the reply instruction responsive to the fourth instruction and indicative of the present total voltage of the multiple cells.

16. A charging method for charging a chargeable device comprising a charging

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Zhang Jialiang

Classifications

• H02J7/663

  using battery or load disconnect circuits (H02J9/002 takes precedence) · CPC title

• H02J7/94

  in response to battery current · CPC title

• H02J7/42

  with electronic devices having internal batteries, e.g. mobile phones · CPC title

• H02J7/933

  the cycle being controlled or terminated in response to electric parameters · CPC title

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title