Power supply device and power supplying method for power supply device

• US 9,112,358 B2
• Filed: 09/01/2011
• Issued: 08/18/2015
• Est. Priority Date: 03/08/2006
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Cha, Jae-deok
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): PIGGUSH, AARON C
• Application Number:
  US13/223,709
• Publication Number:
  US 20120025767A1
• Time in Patent Office: 1,447 Days
• Field of Search: 320/103, 320/111, 320/112, 320/114, 320/120, 320/136, 320/138, 320/163
• US Class Current: 1/1
• CPC Class Codes: G06F 1/26 Power supply means, e.g. regulation thereof for memories G11C
• CPC Class Codes: G06F 1/263 Arrangements for using multiple switchable power supplies, e.g. battery and AC G06F1/30 takes precedence
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence

Abstract

A power supply device includes a battery, a charging part charging the battery, a power input to receive adapter power from an adapter supplied with external power or power output from a similarly configured power supply device, a power output part to output the adapter power, the power output of a similarly configured power supply device, or the battery power of the battery, and a controller to control the input power to apply power to the charging part and the power output part when the input power is supplied to the power input part, and to control the battery to apply power to the power output part when the input power is not supplied to the power input part. Thus, the power supply device is capable of applying power from an adapter to a portable electronic device while charging an internal battery with the adapter power.

Claims

1. A system comprising:

a portable electronic device including;

a system unit,

an internal power supply unit including a first rechargeable battery and supplying an operating power to the system unit, and

a first power input part to receive electrical power from an external source;

an AC adapter to convert AC power from an electrical outlet into an adapter power of a first voltage level, the AC adapter including an adapter connecting terminal through which the adapter power is supplied; and

an external power supply device including a second rechargeable battery of a second voltage level which is lower than the first voltage level, connectable between the AC adapter and the portable electronic device, the external power supply device including;

a second power input part connectable to receive the adapter power from the AC adapter,

a charging part to charge the second rechargeable battery using the adapter power from the AC adapter,

a power output part,

a controller to control an amount of the adapter power applied to the charging part and the power output part, when the second power input part is connected to receive the adapter power from the AC adapter, and

a voltage regulator coupled between the controller and the power output part;

wherein, when no power is received by the second power input part of the external power supply device, the voltage regulator of the external power supply device receives battery power supplied from the second rechargeable battery and increases the second voltage level of the received battery power, which is supplied to the power output part of the external power supply device, to the first voltage level of the adapter power,

wherein the portable electronic device is connectable to receive power from either one of the AC adapter and the external power supply device.

2. The system according to claim 1, wherein the first voltage level of the adapter power is 19V.

3. The system according to claim 2, wherein the controller comprises:

a first switch to control the adapter power to be applied to the charging part and the power output part; and

a second switch to control the battery power to be applied to the power output part.

4. The system according to claim 3, wherein the first switch comprises:

a first transistor interposed between the second power input part and the power output part and turned on to apply the adapter power to the charging part and the power output part;

a first diode connected in parallel to the first transistor and having an anode connected to one end of the first transistor and a cathode connected to the other end of the first transistor; and

the second switch comprises;

a second transistor interposed between the second rechargeable battery and the power output part and turned on to apply the battery power to the power output part; and

a second diode connected in parallel to the second transistor and having an anode connected to one end of the second transistor and a cathode connected to the other end of the second transistor.

5. The system according to claim 4, wherein:

when the adaptor power is supplied through the second power input part, the first switch is switched on and the second switch is switched off, so as to apply the adaptor power to the charging part and to the power output part; and

when the adaptor power is not supplied through the second power input part, the first switch is switched off and the second switch is switched on, so as to apply the battery power to the power output part.

6. The system according to claim 5, wherein the controller further comprises:

a microcontroller that compares the voltage difference between the adaptor power and the battery power with a predetermined reference value, and turns on one of the first transistor and the second transistor according to a result of the comparison.

7. The system according to claim 6, wherein the controller further comprises:

a microcontroller that controls the first switch to be switched on and the second switch to be switched off, so as to apply the adaptor power to the charging part and the power output part when the adaptor power is supplied through the second power input part, and controls the first switch to be switched off and the second switch to be switched on, so as to apply the battery power to the power output part when the adaptor power is not supplied through the second power input part.

8. The system according to claim 1, wherein the voltage regulator further comprises:

a buck/boost circuit placed ahead of the power output part to regulate the battery power applied to the power output part, so as to have a predetermined voltage level of the adapter power, and to output the regulated power to the power output part.

9. The system according to claim 8, wherein, the power output part comprises a power output terminal having the same configuration as the adapter connecting terminal of the adapter that connects to the second power input part, and

wherein the second power input part comprises a power input terminal having the same power configuration as a connecting terminal of the first power input part that connects to the power output part.

10. The system according to claim 9, wherein, when the adaptor power is supplied to the second power input part of the external power supply device, the system operates in an external power supply device charging mode where the charging part charges the battery with the adaptor power input to the external power supply device.

11. The system according to claim 10, wherein, when the adaptor power is not supplied to the second power input part of the external power supply device, the system operates in an external power supply device discharging mode where the battery power of the second rechargeable battery is applied to the power output part through the second switch and the voltage regulator.

12. The system according to claim 11, wherein, when the adapter connecting terminal of the adapter is connected to the first power input part of the portable electronic device, so as to apply the adapter power to the portable electronic device, the portable electronic device operates with the supplied adapter power and a first rechargeable battery of the portable electronic device is charged with the adapter power.

13. The system according to claim 12, wherein, when the adaptor power is supplied to the second power input part of the external power supply device and the portable electronic device is connected to the power output part of the external power supply device,

the charging part charges the second rechargeable battery with the adaptor power input to the external power supply device, the increased power which is increased by the voltage regulator is applied to the power output part, the portable electronic device operates with the increased power supplied from the external power supply device, and a first rechargeable battery of the portable electronic device is charged with the increased power.

14. The system according to claim 13, wherein the system further comprises:

another external power supply device connected to the output part of the external power supply device and to the first power input part of the portable electronic device, the another external power supply device comprising;

another rechargeable battery;

another charging part charging the rechargeable battery;

another power input part receiving adapter power connected to the adapter;

another power output part outputting the adapter power to the external power supply device; and

a controller controlling the adapter power to be applied to the charging part and to the power output part when the power input part is supplied with the adapter power, and controlling the battery power to be applied to the power output part when the power input part is not supplied with adapter power.

15. A power supply device connectable in series between a portable electronic device and an AC adapter, the power supply device comprising:

a rechargeable battery of a first voltage level;

a power input part connectable to receive an adapter power from the AC adapter;

a charging part to charge the rechargeable battery using the adapter power from the AC adapter of a second voltage level which is higher than the first voltage level;

a power output part;

a controller to control an amount of the adapter power applied to the charging part and the power output part, when the power input part is connected to receive the adapter power from the AC adapter; and

a voltage regulator coupled between the controller and the power output part,

wherein, when no power is received by the power input part, the voltage regulator receives battery power supplied from the rechargeable battery and regulates increases the first voltage level of the received battery power, which is supplied to the power output part, to the second voltage level of the adapter power.

16. The power supply device of claim 15, wherein the second voltage level of the adapter power is 19V.

17. The power supply device of claim 15, wherein the power input part is connectable to another power supply device, so as to receive a battery power from the another power supply device, and

the controller controls an amount of the received battery power applied to the charging part and the power output part.

18. The power supply device of claim 15, wherein the power output part comprises:

a power output terminal having the same configuration as the adapter connecting terminal of the adapter that connects to the power input part; and

the power input part comprises;

a power input terminal having the same configuration as a portable electronic device connecting terminal of a portable electronic device that receives either the adapter power or the power output from the power output part.

19. The power supply device of claim 18, wherein the controller comprises:

a first switch to control the adapter power to be applied to the charging part and the power output part; and

a second switch to control the battery power to be applied to the power output part.

20. The power supply device of claim 19, wherein the first switch comprises:

a first transistor interposed between the power input part and the power output part and turned on to apply the adapter power to the charging part and the power output part;

a first diode connected in parallel to the first transistor and having an anode connected to one end of the first transistor and a cathode connected to the other end of the first transistor; and

the second switch comprises;

a second transistor interposed between the battery and the power output part and turned on to apply the battery power to the power output part; and

a second diode connected in parallel to the second transistor and having an anode connected to one end of the second transistor and a cathode connected to the other end of the second transistor.

21. The power supply device of claim 20, wherein, when the adaptor power is supplied through the power input part, the first switch is switched on and the second switch is switched off, so as to apply the adaptor power to the charging part and to the power output part;

and

when the adaptor power is not supplied through the power input part, the first switch is switched off and the second switch is switched on, so as to apply the battery power to the power output part.

22. The power supply device of claim 21, wherein the controller further comprises:

a microcontroller that compares the voltage difference between the adaptor power and the battery power with a predetermined reference value, and turns on one of the first transistor and the second transistor according to a result of the comparison.

23. The power supply device of claim 22, wherein the controller further comprises:

a microcontroller that controls the first switch to be switched on and the second switch to be switched off, so as to apply the adaptor power to the charging part and the power output part when the adaptor power is supplied through the second power input part, and controls the first switch to be switched off and the second switch to be switched on, so as to apply the battery power to the power output part when the adaptor power is not supplied through the second power input part.

24. The power supply device of claim 23, wherein the voltage regulator further comprises:

a buck/boost circuit placed ahead of the power output part to regulate the battery power applied to the power output part, so as to have a predetermined voltage level of the adapter power, and to output the regulated power to the power output part.