Energy-storage integrated application device and operation thereof

1. An application device comprising:

an energy storage,

a signal port connectable to a distribution line configured to:

in a first mode, receive power from an AC power source for operating the application device, and

in a second mode, exchange data via the distribution line;

wherein the first and second modes are applied consecutively and wherein the application device is powered with energy from the energy storage during the second mode; wherein the application device stays in the second mode for a time period depending on the amount of data to be exchanged.

2. The application device according to claim 1 , wherein the signal port is further adapted to receive:

in a third mode, power from a DC power source for operating the application device.

3. The application device according to claim 1 , wherein the signal port is further adapted to transmit:

in a third mode, power from the energy storage onto the distribution line.

4. The application device according to claim 2 , wherein in the third mode, the signal port is further adapted to transmit or receive data modulated onto the DC power signal.

5. The application device according to claim 1 , further comprising circuitry to monitor a status of the energy storage and submit a signal to an external controller, if the energy stored by the energy storage falls below a predetermined threshold to request operation in the first mode.

6. The application device according to claim 1 , further comprising a bidirectional current controller and a communication module, both connectable to the distribution line, wherein

in the first mode, the current controller is connected to the distribution line to receive power from the external AC power source and the communication module is disconnected from the distribution line,

in the second mode, the current controller is disconnected from the distribution line and the communication module is connected to the distribution line, and

in a third mode, the current controller is connected to the distribution line to receive DC power from an external DC power source or to provide power from the energy storage to the distribution line.

7. The application device according to claim 6 , further comprising a modulation-demodulation module connected to the bidirectional current controller, to modulate data onto the DC power signal provided on the distribution line or to demodulate data received with the DC power signal.

8. The application device according to claim 1 further comprising an energy storage charger, wherein in the first mode the signal port connectable to the distribution line is further configured to receive power from the AC power source for charging the energy storage by the energy storage charger.

9. The application device according to claim 2 , further comprising an energy storage charger, wherein in the third mode the signal port connectable to the distribution line is further configured to receive power from the DC power source for charging the energy storage by the energy storage charger.

10. An application controller for use in the application device according to claim 1 , wherein the application controller comprising:

a signal port connectable to a distribution line, and

wherein the application controller is configured to:

in a first mode, control an AC power source to connect to the distribution line to provide power to an application device via the distribution line,

in a second mode, control the AC power source to disconnect from the distribution line and to send a data transmission to the application device or to receive a data transmission from the application device; wherein the application device stays in the second mode for a time period depending on the amount of data to be exchanged;

wherein the application device is powered with energy from the energy storage during the second mode; and,

wherein the application controller switches between the first and second mode.

11. The application controller according to claim 10 , wherein the application controller switches from the second mode to the first mode upon receipt of a signal from the application device indicating that a power stored by the energy storage of the application device has fallen below a predetermined threshold.

12. The application controller according to claim 10 , further comprising a monitoring unit for monitoring a quality of the AC power in the first mode, wherein the application controller is configured to control the application device to switch to a third mode in which DC power is provided by an energy storage of the application device and transmitted via the distribution line as a power signal with or without a modulated data signal when the quality of the AC power drops below a certain value.

13. The application controller according to claim 12 , wherein the monitoring unit comprises a phase locked loop detector to detect a zero crossing of the AC voltage to determine the AC frequency and wherein the application controller is configured to control the application device to switch to the third mode, if the AC frequency deviates from a nominal frequency by a predetermined amount.

14. The application controller according to claim 10 , further comprising a monitoring unit for monitoring costs of the AC power in the first mode, wherein the application controller is configured to control the application device to switch to a third mode in which DC power is provided by an energy storage of the application device and transmitted via the distribution line as a power signal with or without a modulated data signal when the quality of the AC power drops below a certain value.

15. A method for operating an application system comprising one or more application devices and an application controller, the method comprising:

in a first mode, controlling an AC power source to connect to the distribution line to provide power to an application device via the distribution line,

in a second mode, controlling the AC power source to disconnect from the distribution line and enabling data transmission between the one or more application devices and between the one or more application devices and the application controller; wherein the application device stays in the second mode for a time period depending on the amount of data to be exchanged;

in a third mode, controlling the AC power source to disconnect from the distribution line and enabling DC power transmissions between the one or more application devices.