Chargeable device and charging method

Patent metadata

Field	Value
Publication number	US-2018269697-A1
Application number	US-201715556025-A
Country	US
Kind code	A1
Filing date	Feb 24, 2017
Priority date	Oct 12, 2016
Publication date	Sep 20, 2018
Grant date	—

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 onto two terminals of multiple cells coupled in series built in the chargeable device to charge the multiple cells directly.

First claim

1 . A chargeable device, comprising:
a charging interface; a first charging circuit, coupled to the charging interface 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 between a positive terminal and a negative terminal of multiple cells coupled in series built in the chargeable device to charge the multiple cells directly; a balance circuit, coupled to the multiple cells and configured to balance voltage between the multiple cells.

2 . The chargeable device of claim 1 , wherein the multiple cells comprise a first cell and a second cell, and the balance circuit transfers electricity between the first cell and the second cell by capacitive coupling.

3 . The chargeable device of claim 2 , wherein the balance circuit comprises:
a first converting circuit configured to receive a direct current (DC) voltage outputted by the first cell and convert the DC voltage outputted by the first cell into a first alternating current (AC) voltage; a first voltage adjustment circuit configured to receive the first AC voltage and convert the first AC voltage into a second AC voltage, an amplitude of the second AC voltage being greater than an amplitude of the first AC voltage; a first capacitive coupling circuit and a second converting circuit, the first capacitive coupling circuit capacitive-coupling the second AC voltage to the second converting circuit; the second converting circuit converting the second AC voltage into a first charging voltage to charge the second cell.

4 . The chargeable device of claim 3 , wherein the first voltage adjustment circuit comprises a first resonance circuit configured to receive the first AC voltage and resonantly convert the first AC voltage into the second AC voltage.

5 . The chargeable device of claim 3 , wherein the balance circuit further comprises a second voltage adjustment circuit and a second capacitive coupling circuit;
the second converting circuit is further configured to receive a DC voltage outputted by the second cell and convert the DC voltage outputted by the second cell into a third AC voltage; the second voltage adjustment circuit is configured to receive the third AC voltage and convert the third AC voltage into a fourth AC voltage; an amplitude of the fourth AC voltage is greater than an amplitude of the third AC voltage; the second capacitive coupling circuit conducts the fourth AC voltage to the first converting circuit by capacitive coupling; the first converting circuit converts the fourth AC voltage into a second charging voltage to charge the first cell.

6 . The chargeable device of claim 5 , wherein the second voltage adjustment circuit comprises a second resonance circuit configured to receive the third AC voltage and resonantly convert the third AC voltage into the fourth AC voltage.

7 . (canceled)

8 . The chargeable device of claim 5 , wherein the balance circuit further comprises:
a first control circuit configured to control the first voltage adjustment circuit and the first capacitive coupling circuit to operate to charge the second cell when the voltage of the first cell is greater than the voltage of the second cell, and configured to control the second voltage adjustment circuit and the second capacitive coupling circuit to operate to charge the first cell when the voltage of the second cell is greater than the voltage of the first cell.

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

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

11 . (canceled)

12 . The chargeable device of claim 1 , further comprising:
a second charging circuit, comprising a voltage boost circuit coupled between the charging interface and the multiple cells, wherein the voltage boost circuit converts 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.

13 . (canceled)

14 . The chargeable device of claim 12 , wherein the chargeable device and the adapter are selectively operable in a first charging mode or a second charging mode, a charging rate of the chargeable device operable in the second charging mode is faster than a charging rate of the chargeable device operable in the first 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 second 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 first charging mode.

15 . The chargeable device of claim 14 , 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 second charging mode.

16 . The chargeable device of claim 15 , 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.

17 . The chargeable device of claim 16 , 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 second 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 second charging mode; the control circuit is further configured to control the adapter to charge the multiple cells through the first charging circuit when the chargeable device agrees to enable the second charging mode.

18 - 23 . (canceled)

24 . A charging method for charging a chargeable device comprising a charging interface, the charging method comprising:
receiving voltage and current outputted by an adapter through the charging interface; applying the voltage and current outputted by the adapter between a positive terminal and a negative terminal of multiple cells coupled in series built in the chargeable device to directly charge the multiple cells; and balancing voltage between the multiple cells.

25 . The charging method of claim 24 , wherein the multiple cells comprise a first cell and a second cell,
the balancing voltage between the multiple cells comprises: transferring electricity between the first cell and the second cell by capacitive coupling.

26 . The charging method of claim 25 , wherein the transferring electricity between the first cell and the second cell by capacitive coupling comprises:
receiving a direct current (DC) voltage outputted by the first cell and converting

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Zhang Jialiang
• Tian Chen
• Zhang Jun
• Chen Shebiao
• Wan Shiming
• Li Jiada

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