Adapter and charging control method

• US 10,541,553 B2
• Filed: 01/07/2017
• Issued: 01/21/2020
• Est. Priority Date: 02/05/2016
• Status: Active Grant

• Current Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Original Assignee: Guangdong OPPO Mobile Telecommunications Corporation Limited
• Inventors: Tian, Chen, Zhang, Jialiang
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): Omar, Ahmed H
• Application Number:
  US15/561,297
• Publication Number:
  US 20180331559A1
• Time in Patent Office: 1,109 Days
• Field of Search: 320139, 320108
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H02J 2207/10 Control circuit supply, e.g. means for supplying power to the control circuit
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00043 using switches, contacts or markings, e.g. optical, magnetic or barcode
• CPC Class Codes: H02J 7/0025 Sequential battery discharge in systems with a plurality of batteries
• CPC Class Codes: H02J 7/00304 Overcurrent protection
• CPC Class Codes: H02J 7/0031 using battery or load disconnect circuits H02J9/002 takes precedence
• CPC Class Codes: H02J 7/0042 characterised by the mechanical construction
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/00711 with introduction of pulses during the charging process
• CPC Class Codes: H02J 7/00712 the cycle being controlled or terminated in response to electric parameters
• CPC Class Codes: H02J 7/00714 : in response to battery charging or discharging current
• CPC Class Codes: H02J 7/007182 : in response to battery voltage
• CPC Class Codes: H02J 7/007188 : the charge cycle being controlled or terminated in response to non-electric parameters
• CPC Class Codes: H02J 7/007192 : in response to temperature
• CPC Class Codes: H02J 7/02 : for charging batteries from ac mains by converters
• CPC Class Codes: H02J 7/04 : Regulation of charging current or voltage
• CPC Class Codes: H02J 7/06 : using discharge tubes or semiconductor devices
• CPC Class Codes: H02J 7/2434 : with pulse modulation
• CPC Class Codes: H02M 1/0009 : Devices or circuits for detecting current in a converter
• CPC Class Codes: H02M 1/08 : Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
• CPC Class Codes: H02M 1/44 : Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
• CPC Class Codes: H02M 3/335 : using semiconductor devices only
• CPC Class Codes: H02M 3/33507 : with automatic control of the output voltage or current, e.g. flyback converters H02M3/33561, H02M3/33569 take precedence
• CPC Class Codes: H02M 3/33523 : with galvanic isolation between input and output of both the power stage and the feedback loop
• CPC Class Codes: H02M 3/33576 : having at least one active switching element at the secondary side of an isolation transformer
• CPC Class Codes: H02M 3/33592 : having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
• CPC Class Codes: H02M 5/04 : by static converters controlling transformers, reactors or choke coils, e.g. by tap changing H02P13/00
• CPC Class Codes: H02M 7/04 : by static converters
• CPC Class Codes: H02M 7/06 : using discharge tubes without control electrode or semiconductor devices without control electrode
• CPC Class Codes: H02M 7/217 : using semiconductor devices only
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries

Abstract

An adapter, a charging control method and charging system are disclosed. The adapter includes a primary unit, a power adjustment unit and a secondary unit. The primary unit converts an input alternating current into a first current with a first pulsating waveform. The adapter is capable of operating in a constant current mode. A peak value of the first current is greater than a current value corresponding to a current limiting point of the constant current mode. The power adjustment unit samples current outputted by the adapter to obtain a current sampling value, modules the first current according to the current sampling value. The secondary unit converts current coupled from the primary unit to the secondary unit into the current. The current outputted by the adapter is a second current with a second pulsating waveform. A peak value of the second current is equal to the current value corresponding to the current limiting.

Claims

1. An adapter, comprising:

a primary unit, configured to convert an input alternating current into a first current with a first pulsating waveform, wherein the adapter is configured to be capable of operating in a constant current mode, and a peak value of the first current is greater than a current value corresponding to a current limiting point of the constant current mode;

a power adjustment unit, configured to sample current outputted by the adapter to obtain a current sampling value and to module the first current according to the current sampling value; and

a secondary unit, configured to convert current coupled from the primary unit to the secondary unit into the current outputted by the adapter, wherein the current outputted by the adapter is a second current with a second pulsating waveform, and a peak value of the second current is equal to the current value corresponding to the current limiting point of the constant current mode.

2. The adapter according to claim 1, wherein the second pulsating waveform represents at least one of a complete pulsating waveform and a pulsating waveform obtained after a peak clipping processing.

3. The adapter according to claim 1, wherein the adapter is configured to support a first charging mode and a second charging mode, a charging speed of the adapter in the second charging mode is faster than that in the first charging mode, the adapter is configured to charge a device to be charged by using the constant current mode in the second charging mode, the adapter further comprises a control unit, and when the adapter is coupled to the device to be charged, the control unit is configured to perform a bidirectional communication with the device to be charged so as to control output of the adapter in the second charging mode.

4. The adapter according to claim 3, wherein when the control unit performs the bidirectional communication with the device to be charged so as to control the output of the adapter in the second charging mode, the control unit is configured to:

perform the bidirectional communication with the device to be charged so as to negotiate about a charging mode between the adapter and the device to be charged.

5. The adapter according to claim 4, wherein when the control unit performs the bidirectional communication with the device to be charged so as to negotiate about the charging mode between the adapter and the device to be charged, the control unit is configured to:

send a first instruction to the device to be charged, the first instruction being configured to query the device to be charged whether to start the second charging mode;

receive a first reply instruction sent by the device to be charged, the first reply instruction being configured to indicate whether the device to be charged agrees to start the second charging mode; and

charge the device to be charged in the second charging mode when the device to be charged agrees to start the second charging mode.

6. The adapter according to claim 3, wherein when the control unit performs the bidirectional communication with the device to be charged so as to control the output of the adapter in the second charging mode, the control unit is configured to:

perform the bidirectional communication with the device to be charged so as to determine a charging voltage outputted by the adapter in the second charging mode for charging the device to be charged; and

adjust voltage outputted by the adapter, such that the voltage outputted by the adapter is equal to the charging voltage outputted by the adapter in the second charging mode for charging the device to be charged.

7. The adapter according to claim 6, wherein when the control unit performs the bidirectional communication with the device to be charged so as to determine the charging voltage outputted by the adapter in the second charging mode for charging the device to be charged, the control unit is configured to:

send a second instruction to the device to be charged, the second instruction being configured to query whether the voltage outputted by the adapter is suitable for a present voltage of a battery of the device to be charged; and

receive a second reply instruction sent by the device to be charged, the second reply instruction being configured to indicate that the voltage outputted by the adapter is suitable, high or low.

8. The adapter according to claim 3, wherein when the control unit performs the bidirectional communication with the device to be charged so as to control the output of the adapter in the second charging mode, the control unit is configured to:

perform the bidirectional communication with the device to be charged so as to determine a charging current outputted by the adapter in the second charging mode for charging the device to be charged; and

adjust current outputted by the adapter, such that the current outputted by the adapter is equal to the charging current outputted by the adapter in the second charging mode for charging the device to be charged.

9. The adapter according to claim 8, wherein when the control unit performs the bidirectional communication with the device to be charged so as to determine the charging current outputted by the adapter in the second charging mode for charging the device to be charged, the control unit is configured to:

send a third instruction to the device to be charged, the third instruction being configured to query a maximum charging current supported by the device to be charged;

receive a third reply instruction sent by the device to be charged, the third reply instruction being configured to indicate the maximum charging current supported by the device to be charged; and

determine the charging current outputted by the adapter in the second charging mode for charging the device to be charged according to the maximum charging current supported by the device to be charged.

10. The adapter according to claim 3, wherein when the control unit performs the bidirectional communication with the device to be charged so as to control the output of the adapter in the second charging mode, the control unit is configured to:

perform the bidirectional communication with the device to be charged so as to adjust the current outputted by the adapter during a charging process in the second charging mode.

11. The adapter according to claim 10, wherein when the control unit performs the bidirectional communication with the device to be charged so as to adjust the current outputted by the adapter, the control unit is configured to:

send a fourth instruction to the device to be charged, the fourth instruction being configured to query a present voltage of a battery of the device to be charged;

receive a fourth reply instruction replying the fourth instruction sent by adapter, the fourth reply instruction being configured to indicate the present voltage of the battery of the device to be charged; and

adjust the current outputted by the adapter according to the present voltage of the battery.

12. The adapter according to claim 3, further comprising:

a charging interface, wherein the control unit is configured to perform the bidirectional communicate with the device to be charged via a data wire of the charging interface, wherein the charging interface is configured as a universal serial bus interface.

13. The adapter according to claim 1, wherein the current and the voltage outputted by the adapter are applied directly to two ends of a battery of the device to be charged, so as to perform a direct charging on the battery.

14. A charging control method, applied in an adapter,

wherein the adapter comprises:

a primary unit, configured to convert an input alternating current into a first current with a first pulsating waveform, wherein the adapter is configured to be capable of operating in a constant current mode, and a peak value of the first current is greater than a current value corresponding to a current limiting point of the constant current mode;

a power adjustment unit, configured to sample current outputted by the adapter to obtain a current sampling value and to module the first current according to the current sampling value; and

a secondary unit, configured to convert current coupled from the primary unit to the secondary unit into the current outputted by the adapter, wherein the current outputted by the adapter is a second current with a second pulsating waveform, and a peak value of the second current is equal to the current value corresponding to the current limiting point of the constant current mode;

wherein the adapter is configured to support a first charging mode and a second charging mode, a charging speed of the adapter in the second charging mode is faster than that in the first charging mode, the adapter is configured to charge the device to be charged by using a constant current mode in the second charging mode, and the method comprises;

performing a bidirectional communication with the device to be charged so as to control output of the adapter in the second charging mode when the adapter is coupled to the device to be charged.

15. The method according to claim 14, wherein performing a bidirectional communication with the device to be charged so as to control output of the adapter in the second charging mode, comprises:

performing, by a control unit, the bidirectional communication with the device to be charged so as to negotiate about a charging mode between the adapter and the device to be charged.

16. The method according to claim 15, wherein performing the bidirectional communication with the device to be charged so as to negotiate about a charging mode between the adapter and the device to be charged, comprises:

sending a first instruction to the device to be charged, the first instruction being configured to query the device to be charged whether to start the second charging mode;

receiving a first reply instruction sent by the device to be charged, the first reply instruction being configured to indicate whether the device to be charged agrees to start the second charging mode; and

charging the device to be charged in the second charging mode when the device to be charged agrees to start the second charging mode.

17. The method according to claim 14, wherein performing a bidirectional communication with the device to be charged so as to control output of the adapter in the second charging mode, comprises:

performing the bidirectional communication with the device to be charged so as to determine a charging voltage outputted by the adapter in the second charging mode for charging the device to be charged; and

adjusting voltage outputted by the adapter, such that the voltage outputted by the adapter is equal to the charging voltage outputted by the adapter in the second charging mode for charging the device to be charged.

18. The method according to claim 17, wherein performing the bidirectional communication with the device to be charged so as to determine charging voltage outputted by the adapter in the second charging mode for charging the device to be charged, comprises:

sending a second instruction to the device to be charged, the second instruction being configured to query whether the voltage outputted by the adapter is suitable for a present voltage of a battery of the device to be charged; and

receiving a second reply instruction sent by the device to be charged, the second reply instruction being configured to indicate that the voltage outputted by the adapter is suitable, high or low.

19. The method according to claim 14, wherein performing a bidirectional communication with the device to be charged so as to control output of the adapter in the second charging mode, comprises:

performing the bidirectional communication with the device to be charged so as to determine a charging current outputted by the adapter in the second charging mode for charging the device to be charged; and

adjusting current outputted by the adapter, such that the current outputted by the adapter is equal to the charging current outputted by the adapter in the second charging mode for charging the device to be charged.

20. A charging System, comprising:

a device to be charged;

an adapter,

wherein the adapter is configured to support a first charging mode and a second charging mode, a charging speed of the adapter in the second charging mode is faster than that in the first charging mode, the adapter is configured to charge the device to be charged by using a constant current mode in the second charging mode;

wherein the adapter comprises;

a primary unit, configured to convert an input alternating current into a first current with a first pulsating waveform, wherein the adapter is configured to be capable of operating in a constant current mode, and a peak value of the first current is greater than a current value corresponding to a current limiting point of the constant current mode;

a power adjustment unit, configured to sample current outputted by the adapter to obtain a current sampling value and to module the first current according to the current sampling value;

a secondary unit, configured to convert current coupled from the primary unit to the secondary unit into the current outputted by the adapter, wherein the current outputted by the adapter is a second current with a second pulsating waveform, and a peak value of the second current is equal to the current value corresponding to the current limiting point of the constant current mode;

a charging interface; and

a control unit, configured to perform a bidirectional communication with the device to be charged via a data wire of the charging interface so as to control output of the adapter in the second charging mode.