Power adapter capable of communicating digitally with electronic devices using packet-based protocol

• US 8,261,100 B2
• Filed: 01/03/2008
• Issued: 09/04/2012
• Est. Priority Date: 08/30/2006
• Status: Expired due to Fees

• Current Assignee: Green Plug, Inc.
• Original Assignee: Green Plug, Inc.
• Inventors: Mody, Parag, Yassaie, Hossein, Paniagua, Frank Jr.
• Primary Examiner(s): WANG, ALBERT C
• Application Number:
  US11/969,163
• Publication Number:
  US 20080222431A1
• Time in Patent Office: 1,706 Days
• Field of Search: 320/114, 455/573, 713/300
• US Class Current: 713/300
• 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 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries

Abstract

A power adapter capable of communicating digitally with a device or a legacy adapter associated with a device is described. The power adapter includes an input port to receive power from a power source, a regulator to convert the received power from the power source, an output port configured to deliver power from the regulator to a device, and a microprocessor configured to communicate digitally with a communication module associated with the device to determine the power requirements of the device. The regulator converts the power from the power source in accordance with the power requirements of the device. A related method of adapting power to a device is also described.

Claims

1. A power adapter to provide power to a device, comprising:

an input port configured to receive power from a power source;

a regulator configured to convert the received power from the power source;

an output port configured to deliver power from the regulator to the device; and

a programmable microprocessor configured to communicate digitally with a communication module associated with the device to determine power requirements of the device, the power requirements of the device being determined based on power adapter-maintained information stored in a memory associated with the microprocessor and device information communicated to the programmable microprocessor from the device via the communication module, wherein the regulator is configured to convert the power from the power source in accordance with the determined power requirements of the device, and wherein the power adaptor communicates digitally with the device using a packet layer protocol via a packet consisting of a 1 byte transmission start segment, a 4 byte vendor/manufacturer identifier segment, a 1 byte message type segment, a payload segment, a 2 byte checksum segment and a 1 byte transmission end segment.

2. The power adapter according to claim 1, further comprising a switch coupled between the input port and the regulator that is controlled by the programmable microprocessor.

3. The power adapter according to claim 1, wherein the device is a portable legacy device and the power adapter-maintained information includes information of at least one associated legacy device.

4. The power adapter according to claim 1, wherein the power adapter is configurable to delay delivery of power to the device until an off-peak time.

5. The power adapter according to claim 1, wherein the device is configured to operate in one of a plurality of operating modes and the regulator converts the power from the power source in accordance with the determined power requirements of the device, the power adapter-maintained information, and the operating mode of the device.

6. The power adapter according to claim 5, wherein the plurality of operating modes includes standby mode, charging mode, priority charging mode, and fully operational mode.

7. The power adapter according to claim 1, wherein the determined power requirements include at least a voltage requirement and a current requirement, and wherein the at least a voltage requirement includes at least one from a group consisting of a nominal voltage, a negative tolerance, and a positive tolerance.

8. The power adapter according to claim 1, further comprising a user interface, wherein the user interface includes a display, an input device for providing entry of user input, and a control menu with one or more control functions.

9. The power adapter according to claim 1, further comprising:

a power signal line to deliver power from the regulator to the output port;

a modulator/demodulator module coupled to the programmable microprocessor and the power signal line to send and receive the digital communication of the programmable microprocessor.

10. The power adapter according to claim 1, wherein the programmable microprocessor is configured to program the regulator to deliver a predefined amount of power to the communication module associated with the device when the device is connected to the output port to allow the communication module associated with the device to communicate with the power adapter.

11. The power adapter according to claim 1, wherein the packet layer protocol includes at least four message types, and the at least four messages types include at least one of a flow control message type and a power statement message type.

12. The power adapter according to claim 1, wherein the payload segment is encrypted.

13. The power adapter according to claim 1, wherein the payload segment includes proprietary information.

14. The power adapter according to claim 1, wherein communicating digitally includes communicating in accordance with a packet layer protocol encapsulated by a Universal Serial Bus protocol.

15. The power adapter according to claim 1, wherein the programmable microprocessor receives a digital communication from the device, which includes a battery, the digital communication including one or more of the following device information:

device identification information, power requirement information, proprietary information, operating mode, battery identification information, and battery condition information.

16. The power adapter according to claim 1, wherein the device information includes a record of the number of times a battery has been charged or a total amount of time the battery has been charged based on the battery identification information, and the power adapter-maintained information includes an estimate of the remaining life of the battery based on the record.

17. The power adapter according to claim 15, further comprising:

a user interface to alert a user when the battery needs replacement based at least in part on one or more of the battery identification information and the battery condition information.

18. The power adapter according to claim 1, wherein the programmable microprocessor receives, via the communication module, a digital communication from the device, which includes a battery, the digital communication including battery condition information, and the battery condition information includes one or more of:

number of times the battery has been charged, amount of time the battery has held a charge, length of time since last charge, and temperature of the battery.

19. The power adapter according to claim 18, further comprising:

a display to present one or more of;

the number of times the battery has been charged, the amount of time the battery has held a charge, the length of time since last charge, and the temperature of the battery.

20. The power adapter according to claim 1, wherein the programmable microprocessor includes a power control module configured to generate a power control signal, in response to the determined power requirements by the programmable microprocessor, to control the power output of the regulator.

21. The power adapter according to claim 1, wherein the programmable microprocessor is further configured to update the power adapter-maintained information in response to the received device information.

22. The power adapter according to claim 1, wherein the programmable microprocessor includes a temperature module configured to receive temperature information from a temperature sensor in the device or a temperature sensor in the power adapter, and the power adapter-maintained information includes the temperature information from the temperature module.

23. The power adapter according to claim 1, wherein the power delivered to the device is DC.

24. The power adapter according to claim 1 further comprising a user interface, wherein the programmable microprocessor is configured to control the user interface.

25. The power adapter according to claim 24, wherein the user interface includes a display.

26. The power adapter according to claim 24, wherein the display is one of a liquid crystal display, a LED display, or an OLED display.

27. The power adapter according to claim 24, wherein the user interface is configured to display information regarding the determined power requirements of the device.

28. The power adapter according to claim 24, wherein the user interface is configured to display a state of the output port.

29. The power adapter according to claim 28, wherein the state includes a voltage level indicator.

30. The power adapter according to claim 24, wherein the user interface includes an input device for receiving user input and displaying the received user input on a display.

31. The power adapter according to claim 30, wherein the input device includes at least one of a push button and a touch screen.

32. The power adapter according to claim 1, wherein the power adapter-maintained information includes user-input data.

33. The power adapter according to claim 1, wherein the power adapter-maintained information includes adjusted device information stored in the memory or information associated with one or more statuses of the adapter.

34. The power adapter according to claim 1, wherein the device information includes predefined power profiles that include one or more of the following:

a constant voltage value, a constant current value, a wattage value, an upper limit current value, and a battery type.

35. A method of adapting power to a device comprising:

receiving power from a power source at an input port;

communicating digitally with a communication module associated with the device to receive device information of the device, the digital communications comprising transmission of information using a packet-based protocol via a packet consisting of a 1 byte transmission start segment, a 4 byte vendor/manufacturer identifier segment, a 1 byte message type segment, a payload segment, a 2 byte checksum segment and a 1 byte transmission end segment;

determining the power requirements of the device based on the received device information and on power adapter-maintained information stored in a memory associated with a programmable microprocessor;

converting the power from the power source in accordance with the determined power requirements of the device; and

delivering the converted power to the device through an output port.

36. A power adapter comprising:

an input port configured to receive power from a power source;

one of more regulators configured to convert power from the power source;

a plurality of output ports configured to deliver power from the one or more regulators to a plurality of devices; and

a programmable microprocessor configured to communicate digitally with a respective communication module associated with a respective device to determine power requirements of the respective device, wherein

the power requirements of the respective device is determined based on power adapter-maintained information stored in a memory associated with the programmable microprocessor and on device information communicated to the programmable microprocessor from the respective device via the respective communication module,

one of the one or more regulators is configured to convert the power from the power source in accordance with the determined power requirements of the respective device, and

the power adaptor communicates digitally with the device using a packet layer protocol via a packet consisting of a 1 byte transmission start segment, a 4 byte vendor/manufacturer identifier segment, a 1 byte message type segment, a payload segment, a 2 byte checksum segment and a 1 byte transmission end segment.

37. The power adapter according to claim 36, further comprising a plurality of switches coupled between the input port and each of the one or more regulators, the plurality of switches being controlled by the programmable microprocessor.

38. The power adapter according to claim 37, wherein when activated, a respective switch of the plurality of switches prevents a respective regulator from being electrically connected to the input port.

39. The power adapter according to claim 36, wherein one or more of the plurality of devices is configured to operate in one of a plurality of operating modes and a respective regulator of the one or more regulators converts power from the power source in accordance with the determined power requirements of the respective device, the power adapter-maintained information, and the operating mode of the respective device.

40. The power adapter according to claim 36, wherein the programmable microprocessor receives a digital communication from one or more of the plurality of devices, where at least one of the one or more of the plurality of devices includes a rechargeable battery, the digital communication including one or more of the following device information:

device identification information, power requirement information, proprietary information, operating mode, battery identification information, and battery condition information.

41. The power adapter according to claim 40, further comprising a display to present at least a part of the battery condition information to a user.

42. The power adapter according to claim 40, further comprising a user interface to alert a user when the battery needs replacement based at least in part on one or more of the battery identification information and battery condition information.

43. The power adapter according to claim 36, wherein the programmable microprocessor receives a digital communication from one or more of the plurality of devices, where at least one of the one or more of the plurality of devices includes a rechargeable battery, the digital communication including battery condition information, and the battery condition information includes one or more of:

number of times the battery has been charged, amount of time the battery has held a charge, length of time since last charge, and temperature of the battery.

44. The power adapter according to claim 36, wherein the device information of the respective device includes a record of the number of times a battery has been charged or the total amount of time the battery has been charged based on battery identification information, and the power adapter-maintained information includes an estimate of the remaining life of the battery based on the record.

45. The power adapter according to claim 36, wherein a voltage and a current delivered to a respective device is independent of voltages and currents delivered to each of the other devices.

46. The power adapter according to claims 36, wherein the power adapter delivers power according to one of a plurality of charge modes when the sum of the power requirements of each of the plurality of devices exceeds a pre-defined maximum.

47. The power adapter according to claim 46, wherein the charge modes include priority charging, where the plurality of devices are charged in order of a preprogrammed preference determined by the programmable microprocessor.

48. The power adapter according to claim 46, wherein the charge modes, determined by the programmable microprocessor, include reduced power charging, where the regulator delivers a reduced power to each of the plurality of devices, which is lower than the power requirements of each of the devices.

49. The power adapter according to claim 46, wherein the charge modes include round-robin charging, where the regulator delivers power to each of the plurality of devices one device at a time.

50. The power adapter according to claim 36, further comprising:

a plurality of power signal lines to deliver power from the one or more regulators to the plurality of output ports; and

one or more encoder/decoder modules coupled to the programmable microprocessor and the plurality of power signal lines operable to send and receive the digital communication of the programmable microprocessor.

51. The power adapter according to claim 36, wherein the one or more regulators are configured to deliver a predefined amount of power to the communication module associated with the respective device when the respective device is connected to one of the output ports to allow the communication module associated with the respective device to communicate with the power adapter.

52. The power adapter according to claim 36, wherein the programmable microprocessor includes a power control module configured to generate one or more power control signals, in response to the determined power requirements of the respective device by the programmable microprocessor, to control the power output of the one or more regulators.

53. The power adapter according to claim 36, wherein the programmable microprocessor includes a communication module to communicate digitally with the communication module associated with each of the plurality of devices to determine the power requirements of each of the plurality of devices.

54. The power adapter according to claim 36, wherein the programmable microprocessor includes a temperature module configured to receive temperature information from a temperature sensor in the device or a temperature sensor in the power adapter, and the power adapter-maintained information includes the temperature information from the temperature module.

55. The power adapter according to claim 36, wherein the programmable microprocessor is configured to have information about the power adapter displayed on a display of the device.

56. The power adapter according to claim 36 further comprising a user interface, wherein the programmable microprocessor is configured to control the user interface.

57. The power adapter according to 56, wherein the user interface includes a display.

58. The power adapter according to claim 57, wherein the display is one of a liquid crystal display, a LED display, or an OLED display.

59. The power adapter according to claim 56, wherein the user interface is configured to provide information regarding the power requirements of one or more of the plurality of devices.

60. The power adapter according to claim 56, wherein the user interface is configured to display a state of one or more of the plurality of output ports.

61. The power adapter according to claim 60, wherein the state includes a voltage level indicator.

62. The power adapter according to claim 56, wherein the user interface includes an input device for providing entry of user input.

63. The power adapter according to claim 62, wherein the input device includes at least one of a push button and a touch screen.

64. The power adapter according to claim 36, wherein the power requirements include at least a voltage requirement and a current requirement, and wherein the at least a voltage requirement includes at least one from a group consisting of a nominal voltage, a negative tolerance, and a positive tolerance.

65. The power adapter according to claim 36, wherein at least one of the plurality of devices is a portable legacy device and the power adapter-maintained information includes information associated with the at least one portable legacy device.

66. The power adapter according to claim 36, wherein the power adapter is configurable to delay delivery of power to one or more of the plurality of devices until an off-peak time.

67. The power adapter according to claim 36, wherein the programmable microprocessor is further configured to update the power adapter-maintained information in response to the received device information from the respective device.

68. The power adapter according claim 36, further comprising a network communication module for communicating with a network.

69. The power adapter according to claim 36, wherein the packet layer protocol includes at least four message types, and the at least four message types include at least one of a flow control message type and a power statement message type.

70. The power adapter according to claim 36, wherein the payload segment is encrypted.

71. The power adapter according to claim 36, wherein the payload segment includes proprietary information.

72. The power adapter according to claim 36, wherein the power adapter-maintained information includes user-input data.

73. The power adapter according to claim 36, wherein the power adapter-maintained information includes adjusted device information stored in the memory or information associated with one or more statuses of the adapter.

74. The power adapter according to claim 36, wherein the device information includes predefined power profiles that include one or more of the following:

a constant voltage value, a constant current value, a wattage value, an upper limit current value, and a battery type.

75. A method of adapting power to a plurality of devices comprising:

receiving power from a power source at an input port;

communicating digitally with a communication module associated with a respective device of the plurality of devices to receive device information of the respective device, the digital communications comprising transmission of information using a packet-based protocol via a packet consisting of a 1 byte transmission start segment, a 4 byte vendor/manufacturer identifier segment, a 1 byte message type segment, a payload segment, a 2 byte checksum segment and a 1 byte transmission end segment;

determining the power requirements of the respective device based on the received device information and on power adapter-maintained information stored in a memory associated with a microprocessor;

converting power from the power source in accordance with the determined power requirements of the respective device; and

delivering the converted power to the respective device through one of a plurality of output ports.

76. A communication module for use with an electrical device, comprising:

a programmable microprocessor, housed in the electrical device, configured to communicate digitally with an external power adapter to communicate device information of the electrical device to the power adapter through a port of the electrical device, and

configured to determine power requirements of the electrical device based on power adapter-maintained information stored in a memory associated with a microprocessor and the communicated device information, the determined power requirements including at least a voltage requirement and a current requirement;

wherein the communication module and power adaptor communicate digitally using a packet layer protocol via a packet consisting of a 1 byte transmission start segment, a 4 byte vendor/manufacturer identifier segment, a 1 byte message type segment, a payload segment, a 2 byte checksum segment and a 1 byte transmission end segment.

77. The communication module of claim 76, wherein the power port of the electrical device is configured to receive a male USB plug.

78. The communication module of claim 76, wherein the programmable microprocessor is configured to communicate digitally with a second microprocessor disposed in the power adapter to determine and communicate the power requirements of the electrical device.

79. The communication module of claim 76, wherein the electrical device includes a rechargeable battery and the programmable microprocessor communicates one or more of the following device information:

device identification information, power requirements, proprietary information, operating mode, battery identification information, and battery condition information.

80. The communication module of claim 76, wherein the electrical device includes a rechargeable battery and the programmable microprocessor communicates battery identification information and battery condition information.

81. The communication module of claim 76, wherein the battery condition information includes one or more of:

number of times the battery has been charged, amount of time the battery has held a charge, length of time since last charge, and temperature of the battery.

82. The communication module of claim 76, wherein the electrical device is a portable legacy device and the power adapter-maintained information includes information associated with the portable legacy device.

83. The communication module of claim 76, wherein the programmable microprocessor is further configured to update the power adapter-maintained information stored locally in response to the received device information from the electrical device.

84. The communication module of claim 76, wherein the packet layer protocol includes at least four messages types, and the at least four message types include at least one of a flow control message type and a power statement message type.

85. The communication module of claim 76, wherein the payload segment is encrypted.

86. The communication module of claim 76, wherein the payload segment includes proprietary information.

87. The communication module according to claim 76, wherein the power adapter-maintained information includes user-input data.

88. The communication module according to claim 76, wherein the power adapter-maintained information includes adjusted device information stored in the memory or information associated with one or more statuses of the adapter.

89. The communication module according to claim 76, wherein the device information includes predefined power profiles that include one or more of the following:

a constant voltage value, a constant current value, a wattage value, an upper limit current value, and a battery type.

90. A method of receiving power from an external power adapter external to an electrical device, comprising:

receiving an initial predefined voltage to facilitate communication between the external power adapter and the electrical device;

communicating digitally with the external power adapter to communicate device information of the electrical device to the external power adapter through a power port of the electrical device, the digital communications comprising transmission of information using a packet-based protocol via a packet consisting of a 1 byte transmission start segment, a 4 byte vendor/manufacturer identifier segment, a 1 byte message type segment, a payload segment, a 2 byte checksum segment and a 1 byte transmission end segment;

determining the power requirements of the electrical device based on the received device information and power adapter-maintained information stored in a memory associated with a microprocessor;

receiving power supplied by the external power adapter based on the determined power requirements of the electrical device, wherein

the power requirements include a voltage requirement and a current requirement.